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HomeMy WebLinkAbout91-0430107 RWVi.VD 1.846 BEFORE THE BOARD OF COUNTY COMMISSIONERS OF DESCHUTES COUNTY, OREGON An Ordinance Amending Chapter * ' 13.08 of the Deschutes County Code, Relating to On Site Sewage * c='cn Disposal and Declaring An Emergency. * t; ORDINANCE NO. 91-043 co THE BOARD OF COUNTY COMMISSIONERS OF DESCHUTES COUNTY, 6REGON, ORDAINS as follows: Section 1. ADOPTION. That the Oregon Administrative Rules adopted by the Department of Environmental Quality pertaining to on-site sewage disposal (OAR Chapter 340 - Divisions 71, 72 and 73), dated September 16, 1986, as amended on March 11, 1988, and as further amended on June 14, 1991, all as attached hereto as Exhibit A and by this reference incorporated herein are hereby adopted by the County as its rules pertaining to on-site sewage disposal. Section 2. REPEAL. That the Oregon Administrative Rules pertaining to on-site sewage adopted by Ordinance 83-057 and found at volume 48 pages 429 to 613 of the Deschutes County Commissioner's Journal are hereby repealed and superseded by the rules adopted pursuant to Section 1 of this Ordinance. Section 3. CODE AMENDMENT. That Section 13.08.010 be amended to read as follows: "13.08.010 Document adopted by reference. A certain book or publication, a copy of which is on file with the county clerk, marked and entitled On -Site Sewage Disposal Rules (dated September 16, 1986, as amended by enactments dated March 11, 1988 and June 14, 1991), hereinafter referred to as "sewage disposal rules" is adopted in its entirety as the sewage disposal rules for the unincorporated areas of the county, for regulating and controlling the construction, alteration, repair, operation and maintenance of on-site sewage disposal systems in the unincorporated areas of the county. The sewage disposal rules so adopted and on file in the office of the county clerk are referred to and by this reference made a part of this chapter as though fully set out in the chapter." Section 4. CONTINUING LIABILITIES. The repeal of any Ordinance or other provision of law by this Ordinance shall not release or extinguish any penalty, forfeiture, nuisance, obligation or liability incurred under such Ordinance, unless a provision of this Ordinance shall so expressly provide, and such Ordinances or other provisions repealed shall be treated as still remaining in 1 - ORDINANCE NO. 91-043 (10/9/91) N1 0V 1991 0167 1847 force for the purpose of sustaining any proper action or prosecution for the enforcement of such penalty, forfeiture, nuisance, obligation, or liability. Section 5. EMERGENCY. This Ordinance being necessary for the immediate preservation of the public peace, health and safety, an emergency is declared to exist, and this Ordinance takes effect on its passage. DATED this J,�Jday of October, 1991. AT T: ecording Secretary BOARD OF COUNTY COMMISSIONERS OF DESSCCH�U ES COUNTY, OREGON TrOM(THIMP, Commissioner NANCY POPE SCHLANGEN, Commissioner DIM 61arLrDLIN, Chairman 2 - ORDINANCE NO. 91-043 (10/9/91) 01%'7 1848 O 1� a 0 o � ` ¢ STATE OF OREGON DEPARTMENT OF ENVIRONMENTAL QUALITY RULES CURRENT AS OF MARCH 11, 1988 CoRR��r ,�s ox' OREGON ADMINISTRATIVE RULES CHAPTER 340 -DIVISIONS 71, 72 & 73 EXHIBIT "A" CONTENTS ,*dry DIVISION 71 ®1 V 1 1849 OAR NUMBER TITLE Page 340-71-100 Definitions . . . . . . . . . . . . . . . . . . . . . 71-1 340-71-110 Purpose . . . . . . . . . . . . . . . . . . . . . . .71-17 340-71-120 Jurisdiction and Policy . . . . . . . . . . . . . . .71-18 340-71-130 General Standards, Prohibitions and Requirements. . . 71-19 340-71-140 Fees - General . . . . . . . . . . . . . . . . . . . 71-21 340-71-150 Site Evaluation Procedures . . . . . . . . . . . . . 71-27 340-71-155 Existing System Evaluation Report . . . . . . . . . .71-30 340-71-160 Permit Application Procedures, General Requirements . 71-31 340-71-165 Permit Denial Review . . . . . . . . . . . . . . . . 71-34 340-71-170 Pre -cover Inspections . . . . . . . . . . . . . . . . 71-35 340-71-175 Certificate of Satisfactory Completion . . . . . . .71-36 340-71-185 Abandonment of Systems . . . . . . . . . . . . . . . 71-38 340-71-195 Upgrading Disposal Systems . . . . . . . . . . . . . 71-39 340-71-200 Prior Construction Permits or Approvals . . . . . . . 71-40 340-71-205 Authorization To Use Existing Systems . . . . . . . . 71-41 340-71-210 Alteration of Existing On -Site Sewage Disposal Systems . . . . . . . . . . . . . . . . . 71-44 340-71-215 Repair of Existing Systems . . . . . . . . . . . . . 71-46 340-71-220 Standard Subsurface Systems . . . . . . . . . . . . . 71-47 340-71-260 Alternative Systems, General . . . . . . . . . . . . 71-57 340-71-265 Capping Fills . . . . . . .. . . . . . . . . 71-58 340-71-270 Evapotranspiration -Absorption (ETA) Systems . . . . . 71-60 340-71-275 Pressurized Distribution Systems . . . . . . . . . . 71-61 340-71-280 Seepage Trench System . . . . . . . . . . . . . . . . 71-65 340-71-285 Redundant Systems . . . . . . . . . . . . . . . . . . 71-66 340-71-290 Conventional Sand Filter Systems . . . . . . . . . . 71-67 340-71-295 Conventional Sand Filter Design and Construction. . . 71-71 340-71-300 Other Sand Filter Designs . . . . . . . . . . . . . . 71-73 340-71-305 Sand Filter System Operation & Maintenance . . . . . 71-75 340-71-310 Steep Slope Systems . . . . . . . . . . . . . . . . . 71-76 340-71-315 Tile Dewatering Systems . . . . . . . . . . . . . . . 71-77 340-71-320 Split Waste Systems . . . . . . . . . . . . . . . . . 71-79 340-71-325 Gray Water Waste Disposal Sumps . . . . . . . . . . . 71-80 340-71-330 Nonwater-Carried Systems . . . . . . . . . . . . 71-81 340-71-335 Cesspools and Seepage Pits . . . . . . . . . . . . .71-83 340-71-340 Holding Tanks . . . . . . . . . . . . . . . . . . . .71-84 340-71-345 Aerobic Systems . . . . . . . . . . . . . . . . . . 71-87 340-71-350 Low -Flush Toilets . . . . . . . . . . . . . . . . . . 71-90 340-71-355 Gravel -Less Disposal Trench Systems . . . . . . . . . 71-91 340-71-360 Disposal Trenches in Saprolite. . . . . . . . . . . . 71-92 340-71-400 Geographic Area Special Considerations . . . . . . . 71-94 340-71-401 Mid -Multnomah County Cesspool and Seepage Pit Use . . 71-101 340-71-410 Rural Area Variances . . . . ... . . . . . . . . . . 71-104 340-71-415 Formal Variances . . . . . . . . . . . . . . . . . . 71-105 340-71-420 Hardship Variances . . . . . . . . . . . . . . . . 71-107 340-71-425 Variance Officers . . . . . . . . . . . . . . . . . . 71-108 340-71-430 Variance Hearings . . . . . . . . . . . . . . . . 71-109 340-71-435 Variance Permit Issuance, Inspections, Certificate of Satisfactory Completion . . . . 71-110 340-71-440 Variance Appeals . . . . . . . . . . . . . . . . . 71-111 I CONTENTS 0107 1850 OAR NUMBER TITLE Page 340-71-445 Variance Administrative Review . . . . . . . . . . . 71-112 340-71-450 Experimental Systems . . . . . . . . . . . . . . . . 71-113 340-71-460 Moratorium Areas . . . . . . . . . . . . . . . . . .71-116 340-71-500 Community Systems . . . . . . . . . . . . . . . . . 71-118 340-71-520 Large Systems . . . . . . . . . . . . . . . . . . . 71-119 340-71-600 Sewage Disposal Service . . . . . . . . . . . . . . 71-120 TABLES 340 -71 -TABLE 1 Minimum Separation Distances . . . . . . . . . . . TABLES -1 340 -71 -TABLE 2 Quantities of Sewage Flows. . . . . . TABLES -2 340 -71 -TABLE 3 Slope, Effective Soil Depth Relationship. . . . . . . TABLES -3 340 -71 -TABLE 4 Minimum Trench Length -Effective Soil Depth. . . . . . TABLES -4 340 -71 -TABLE 5 Minimum Trench Length -Temporary . . DIAGRAMS -3 340 -71 -DIAGRAM 4 Groundwater Depth . . . . . . . . . . . . . . . . .TABLES -5 340 -71 -TABLE 6 Soil Textural Classification Chart . . . . . . . . . TABLES -6 340 -71 -TABLE rs . 7 USDA Soil Classification Sizes of Soil Separator . TABLES -7 340 -71 -TABLE 8 Minimum Separation Distances for Nonwater TABLES -8 340 -71 -DIAGRAM 8 Carried Facilities . . . . . . . . . . . . . . . . . DIAGRAMS -8 DIAGRAMS 340 -71 -DIAGRAM 1 Typical Serial Distribution System (With Drop Boxes) . . . . . . . . DI AG RAMS- 340 -71 -DIAGRAM 2 Typical Serial Distribution System (Without Drop Boxes) . . . . . . . . . . . . . . .DIAGRAMS -2 340 -71 -DIAGRAM 3 Typical Equal Distribution System (With Box). . . . . DIAGRAMS -3 340 -71 -DIAGRAM 4 Typical Equal Distribution System (Without Box) . . . DIAGRAMS -4 340 -71 -DIAGRAM 5 Typical Loop Distribution System . . . . . . . . . . DIAGRAMS -5 340 -71 -DIAGRAM 6 ETA Bed on Gently Sloping Site . . . . . . . . . . . DIAGRAMS -6 340 -71 -DIAGRAM 7 ETA Bed on Sloping Site . . . . . . . . . . . . . . . DIAGRAMS -7 340 -71 -DIAGRAM 8 Reinforced Concrete Sand Filter Container . . . . . . DIAGRAMS -8 340 -71 -DIAGRAM 9 Reinforced Concrete Sand Filter Container . . . . . . DIAGRAMS -9 340 -71 -DIAGRAM 10 Capping Fill . . . . . . . . . . . . . . . . . . . . DIAGRAMS -10 340 -71 -DIAGRAM 11 Redundant System . . . . . . . . . . . . . . . . . . DIAGRAMS -11 340 -71 -DIAGRAM 12 Disposal Trench Cross Sections . . . . . . . . . . . DIAGRAMS -12 340 -71 -DIAGRAM 13 Typical Curtain Drain . . . . . . . . . . . . . . . DIAGRAMS -13 340 -71 -DIAGRAM 14 Typical Gray Water Waste Disposal Sump . . . DIAGRAMS -14 (using seepage chamber) 340 -71 -DIAGRAM 15 Typical Gray Water Waste Disposal Sump . . . . . DIAGRAMS -15 340 -71 -DIAGRAM 16 Pre -Cast Concrete Liner Details . . . . . . . . . . . DIAGRAMS -16 340 -71 -DIAGRAM 17 Typical Cross Section -Parallel Pits . . . . . . . . . DIAGRAMS -17 340 -71 -DIAGRAM 18 Idealized Cross -Section of Escarpment . . . . . . . DIAGRAMS -18 340 -71 -DIAGRAM 19 Idealized Cross -Section of Escarpment . . . . . . . . DIAGRAMS -19 340 -71 -DIAGRAM 20 Idealized Cross -Section of Soil Column . . . . . . . DIAGRAMS -20 340 -71 -DIAGRAM 21 Idealized Illustration of Unstable Landforms . . . . DIAGRAMS -21 340 -71 -DIAGRAM 22 Idealized Cross Section of Unstable Landform . . . . DIAGRAMS -22 340 -71 -DIAGRAM 23 . Idealized Cross Section of Unstable Landform . . . . DIAGRAMS -23 ii CONTENTS 1 R DIVISION 72 0107 1851 OAR NUMBER TITLE Page 340-72-070 Multnomah County Fee Schedule . . . . . . . . . . . . 72-1 340-72-080 Jackson County Fee Schedule . . . . . . . . . . . . . 72-3 340-72-090 Linn County.Fee Schedule . . . . . . . . . . . . . . 72-6 DIVISION 73 OAR NUMBER TITLE Page 340-73-025 Septic Tank Construction . . . . . . . . . . . . ... 73-1 340-73-030 Dosing Septic Tank Assemblies . . . . . . . . . . .73-5 340-73-035 Distribution Boxes . . . . . . . . . . . . . . . . .73-8 340-73-040 Drop Boxes . . . . . . . . . . . . . . . . . . . . 73-9 340-73-041 Filter Fabric . . . . . . . . . . . . . . . . . . . 73-11 340-73-045 Diversion Valves . . . . . . . . . . . . . . . . . 73-12 340-73-050 Dosing Tank Construction . . . . . . . . . . . . 73-13 340-73-055 Effluent Pumps, Controls & Alarms, and Dosing Siphons.. . . . . . . . . . . . . . . . . 73-16 340-73-060 Pipe Materials andConstruction . . . . . . . . . 73-17 340-73-065 Privies and Portable Toilet Shelters . . . . . . . 73-21 340-73-070 Unsealed Earth Pits for Privies . . . . . . . . 73-23 340-73-075 Self -Contained Nonwater-Carried Toilet Facilities . . . . . ... . . . . . . . . . .73-24 340-73-080 Gray Water Waste Disposal Sumps . . . . . . . . . . . 73-26 340-73-085 Flexible Membrane Liners for Sand Filters Treating Septic Tank Effluent . . . . . . . 73-27 WH1816 Revised 9/16/86 iii INDEX (By Subject) 01 f i 7 TITLE V tPPage 1852' Abandonment of Systems . . . . . . . . . . . . . . . . . 71 (38, 46 ) Aerobic Systems . . . . . . . . . . . . . . . . . . . . 71 73 (87) (15 ) Alarms & Controls. . . . . . . . . . . . . . . . . . . Alsea Dunal Aquifer . . . . . . . . . . . . . . . . . . 71 (95 ) Alteration Permit . . . . . . . . . . . . . . . . . . . 71 (44 ) Alternative Systems: General Requirements . . . . . . . . . . . .. . . 71 (57 ) Aerobic Systems . . . . . . . . . . . . . . . . . . 71 (87) Capping Fill . . . . . . . . . . . . . . . . . . . 71 (58 ) Cesspools . . . . . . . . . . . . . . . . . . . . . 71 (83 ) Disposal'Trenches in Saprolite . . . . . . . . 71 (92) Evapotranspiration -Absorption . . . . . . . . . . ..71 (60 ) Gravel -less Disposal Trench System . . . . . . . . 71.(91) Gray Water Waste Disposal Sump . . . . . . . . . . 71 (80), 73 (26) Holding Tank . . . . . . . . . . . . . . . . . . . 71 (84 ) Land Irrigation . . . . . . . . . . . . . . . . . . 71 (57 ) Low Flush Toilet . . . . . . . . . . . . . . . . . 71 (90 ) Nonwater-Carried System . . . . . . . . . . . . . 71 (81), 73 (21-25) Pressurized Distribution System . . . . . . . . . 71 (61) Redundant System . . . . . . . . . . . . . . . . . 71 (66) Sand Filter System . . . . . . . . . . . .. . . 71 (67) Seepage Pit . . . . . . . . . . . . . . . . . . . . 71 (83 ) Seepage Trench System . . . . . . . . . . . . . . . 71 (65 ) Sewage Stabilization Pond . . . . . . . . . . . . . 71 (57) Split Waste System . . . . . . . . . . . . . . . 71 (79) Steep Slope System . . . . . . . . . . . . . . . 71 (76) Tile Dewatering System . . . . . . . . . . . . . . 71 (77) Applications . . . . . . . . . . . . . . . . . . . 71 (31 ) Alteration Permit . . . . . . . . . . . . . . . . . 71 (44 ) Existing System . . . . . . . . . . . . . . . . . . 71 (30) Experimental System . . . . . . . . . . . . . . 71 (113) Permit . . . . . . . . . . . . . . . . . . . . 71 (31, 44 ) Sand Filter . . . . . . . . . . . . . . . . . . . . 71 (73 ) Sewage Disposal License . . . . . . . . . . . . . . 71 (120 ) Site Evaluation . . . . . . . . . . . . . . . . . . 71 (27) Variance . . . . . . . . . . . . . . . . . .. . . 71 (105 ) Authorization Notice . . . . . . . . . . . . . . . . . 71 (37, 41 ) Personal Hardship . . . . . . . . . . . . . . . . . 71 (42 ) Temporary Mobile Home Placement . . . . . . . . . . 71 (43) Backfill of System . . . . . . . . . . . . . . . . . . . 71 (36, 55 ) Bond . . . . . . . . . . . . . . . . . . . . . . . . . . 71 (121 ) Capping Fill . . . . . . . . . . . . . . . . . . . . . . 71 (58) Certificate of Satisfactory Completion . . . . . . . . . 71 (36, 44, 46, 110) Cesspools . . . . . . . . . . . . . . . . . . . . . . . 71 (83, 101 ) Chemical Toilets . . . . . . . . . . . . . . . . . . . . 71 (74), 73 (21, 22, 24 ) Christmas Valley Townsite . . . . . . . . . . . . . . . 71 (98) Cl atsop Plains . . . . . . . . . . . . . . . . . . 71 (98 ) iv INDEX 0167 1853 TITLE Page Commercial Facility . . . . . . . . . . . . . . . . . . 71 (34, 118, 119 ) Permit .Denial . . . . . . . . . . . . . . . . . . . 71 (34) County, General . . . . . . . . . . . . . . . . . . 71 Plan Review . . . . . . . . . . . . . . . . . . . . 71 (22, 118, 119) Community System . . . . . . . . . . . . . . . . . . 71 (118) (25) , 72 (1 ) Controls & Alarms . . . . . . . . . . . . . . . . . . . 73 (15 ) (6 ) Filter Fabric . . . . . . . . . . . . . . County Ordinances . . . . . . . . . . . . . . . . . . . 71 (18 ) Flexible Membrane Liner . . . . . . . . . . . . . . . . 71 Definitions . . . . . . . . . . . . . . . . . . . . . . 71 (1-16) Delegation of Responsibility . . . . . . . . . . . . . . 71 (18) Denial Review Authorization Notice . . . . . . . . . . . .. . . 71 (43 ) Certification of Satisfactory Completion . . . . . 71 (37, 44) Permit . . . . . . ... . . . . . . . . . . . . . . 71 (34 ) Site Evaluation . . . . . . . . . . . . . . . . . 71 (29 ) Disposal of Pumpings . . . . . . . . . . . . . . .. . . 71 (126 ) Disposal Sumps . . . . . . . . . . . . . . . . . . . . . 71 (80) , 73 (26 ) Disposal Trenches . . . . . . . . . . . . . . . . . . . 71 (54, 62, 92 ) Distribution Box . . . . . . . . . . . . . . . . . . . . 71 (53)9 73 (8) Distribution Pipe . . . . . . . . . 71 (55) , 73 (17 ) Distribution Technique . . . . . . . 71 (52) Diversion Valves . . . . . . . . . . 73 (12 ) Dosing Septic Tank Assemblies. . . . 73 (5) Dosing Siphon . . . . . . . . . . . . . . . . . .. . . 73 (16 ) Dosing Tank . . . . . . . . . . . . . . . . . . . . . . 71 (53) , 73 (13 ) Drop Box . . . . . . . . . . . . . . . . . . . . . . . . 71 (53), 73 (9) East of Cascade Range . . . . . . . . . . . . . . . . . 71 (99 ) Effluent Sewer . . . . . . . . . . . . . . . . . . . . . 71 (55) , 73 (17 ) Encumbrances . . . . . . . . . . . . . . . 71 (19 ) Evaluation Report, Existing System . . . . . . . . . . . 71 (30) Evapotranspiration -Absorption Systems . . . . . .. . . 71 (60) Existing Systems, Authorization To Use . . . . . . . . . 71 (41 ) Existing System Evaluation Report . . . . . . 71 (30) Experimental Systems . . . . . . . . . . . . . . . . . . 71 (113) Failing Systems . . . . . . . . . . . . . . . . . . . . 71 (46 ) Fees . . . . . . . . . . . . . . . . . . . . . . . . . . 71 (21-26), 72 (1-6) County, General . . . . . . . . . . . . . . . . . . 71 (21-25) Jackson County . . . . . . . . . . . . . . . . . . 71 (25) , 72 (3 ) Multnomah County . . . . . . . . . . . . . . . . . 71 (25) , 72 (1 ) Linn County . . . . . . . . . . . . . . . . . . . . 71 (25) , 72 (6 ) Filter Fabric . . . . . . . . . . . . . . . . . . . . . . 71 (54, 63 ) Flexible Membrane Liner . . . . . . . . . . . . . . . . 71 (72), 73 (27) General Standards, Prohibitions, Requirements . . . . . 71 (19) V INDEX . . . 71 0107 1854. TITLE . . . 71 -�- Geographic Areas . . . . . . . . . . . . . 71 (43, 94-100) Alsea Dunal Aquifer . . . . 71 71 (95 ) (98) Clatsop Plains Aquifer . . . . (116 ) Christmas Valley Townsite . . . . . . . . . . . . . 71 (98) East of Cascade Range . . . . . . . . . . . .. . . 71 (99 ) Mid -Multnomah County . . . . . . . . . . . . . . . 71 (101) North Florence Dunal Aquifer . . . . . . . . . . . 71 (95) River Road -Santa Clara .. . . . . 71 (110 ) Gravel -less Disposal Trench Sys� ems . . . . . . . . . . 71 (91) Gray Water Waste Disposal Sumps . . . . . . . . .. . . 71 (80), 73 (26) Groundwater Interceptor . . . . . . . . . . . . . . . . 71 (48) Hardship . . . . . . . . . . . . . . . . . . . . . . . . 71 (42, 107 ) Header Pipe . . . . . . . . . . . . . . . . . . . . . . 71 (55) , 73 (17 ) Holding Tank . . . . . . . . . . . . . . . . . . . . . . 71 (84 ) Increased Flows . . . . . . . . . . . . . . . . . . . . 71 (19, 44 ) Jackson County Fee Schedule . . . . . . . . . . . . . . . 72 (3) Jurisdiction and Policy . . . . . . . . . . . . . . . . . 71 (18 ) Land Irrigation of Sewage . . . . . . . . . . . . . . 71 (57 ) Large Systems . . . . . . . . . . . . . . . . . . . . . 71 (18, 56, 119 ) License, Sewage Disposal Service . . . . . . . . . . . . 71 (120) License, Suspension or Revocation . . . . . . . . . . . 71 (123) Linn County Fee Schedule . . . . . . . . . . . . . . . . 72 (6 ) Low -Flush Toilets . . . . . . . . . . . . . . . . . . . 71 (90 ) Manhole Riser . . . . . . . . . . . . . . . . . . . . . 71 (52, 53) , 73 (14 ) Material Standards . . . . . . . . . . . . . . . . . . . 71 (19) , 73 (1-31) Mid -Multnomah County . . . . . . . . . . . . . . . . . . 71 (101 ) Mobile Home Placement . . . . . . . . . . . . . . . . . 71 (43 ) Moratorium Areas . . . . . . . . . . . . . . . . . . . . 71 (116 ) Multnomah County Fee Schedule . . . . . . . . . . . 72 (1) Nonwater-Carried Systems, Toilet Facilities . . . . . . 71 (81), 73 (21-25) North Florence Dunal Aquifer . . . . . . . . . . . . . . 71 (95 ) Notice of Intent to Deny Permit . . . . . . . . . . . . 71 (34) Operation and Maintenance . . . . . . . . . . . . . . . 71 (18, 20, 75, 85, 86, 118, 125), 73 (31) Permit Procedures - General Requirements Application . . . . . . . . . . . . . . .. . . 71 (31-33) Denial . . . . . 71 (31 ) Experimental System . . 71 (113) Issue to . . . . . . . . . . . . . . . .. . . 71 (32 ) Moratorium Areas . . . . . . . . . . . . . . . . . 71 (94-100) Notice of Intent to Deny . . . . . . . . . . . 71 (34) Not Transferable . . . . . . . . . . . . . . . . 71. (33) Renewal . . .. . . . . . . . . . . . . . . . 71 (23, 33) Variance . . . . . . . . . . . . . . . . . . . . . 71 (110 ) Vi INDEX, 0107 1855 TITLE Page Personal Hardship . . . . . . . . . . . . . . . . 71 (42 ) Pipe . . . . 71 (26 ) Distribution . . . . . . . . . . . . . . . . . . 71 (55) , 73 (17-20) Effluent Sewer . . . . . . . . . . . . . . .. . . 71 (55) , 73 (17 ) Header . . . . . . . . . . . . . . . . . . . . . . 71 (55) , 73 (17-20) Pressurized . . . . . . . . . . . . . . . . . . . . 71 (62-64) , 73 (19 ) Pit Privy . . . . . . . . . . . . . . . . . . . . . . . 71 (81, 82) , 73 (21 , 23 ) Plan Review . . . . . . . . . . . . . . . . . . . . . 71 (18, 118, 119) Plumbing Fixtures . . . . . . . . . . . . . . . . . . . 71 (19-20) Policy . . . . . . . . . . . . . . . . . . . . . . . . . 71 (18, 113 ) 73 (27) Portable Toilet Shelters . . . . . . . . . . . . . . . . 71 (81, 82) , 73 (21, 22, Seepage Bed . . . . . . . . . . . . . . . . . 71 24) Pre -cover Inspection . . . . . . . . . . . . . . . . . . 71 (35 ) Pressurized Distribution . . . . . . . . . . . . .. . . 71 (61) Prior Approvals . . . . . . . . . . . . . . . . . . . . 71 (40 ) (21-25) Privy & Portable Toilet Shelters . . . . . . . . . . . . 73 (21, 23 ) 73 (1) Property Line Crossed . . . . . . . . . . . . . . . . . 71 (20 ) Property Owner Responsibility . . . . . . . . . .. . ..71 (18) Public Health Hazard . . . . . . . . . . . . . . . . . . 71 (19 ) Public Waters . . . . . . . . . . . . . . . . . . . . 71 (19 ) 27-29) Pumping Equipment . . . . . . . . . . . . . . . . . . . 71. (123-125) Pumps . . . . 73 (15 ) Purpose of Rules . . 71 (17 ) Redundant Systems . . . . . . . . . . . . . . . . . . . 71 (66) Refunds . . . . . . . . . . . . . . . . . . . . . . . . 71 (26 ) Repair of Existing Systems Permit . . . . . . . . . . . . . . . . . . . . . . 71 (31, 46 ) Emergency Repair . . . . . . . . . . . . . . . . . 71 (46 ) Replacement Area . . . . . . . . . . . . . . . . . . . . 71 (20, 28 ) Report Review . . . . . . . . . . . . . . . . . . . . . 71 (29 ) River Road -Santa Clara . . . . . . . . . . . . . . . . . 71 (94 ) Rural Area Variances . . . . . . . . . . . . . . . . . . 71 (1o4) Sand Filter . . . . . . . . . . . . . . . . . 71 (67-75), 73 (27) Saprolite System . . . . . . . . . . . . . . . 71 (92) Seepage Bed . . . . . . . . . . . . . . . . . 71 (63 ) Seepage Pit . . . . . . . . . . . . . . . . . 71 (83, 101 ) Seepage Trench . . . . . . . . . . . . . . . . 71 (65 ) Self Contained Nonwater-Carried Facilities . . . . . . . 71 (81), 73 (21-25) Septic Tanks . . . . . . . . . . . . . . . . . . . . . . 71 (51, 52) , 73 (1) Sewage Disposal Service . . . . . . . . . . . . . . . . 71 (120 ) Sewage Disposal Service License . . . . . . . . . . . . 71 (120) Sewage Stabilization Pond . . . . . . . . . . . . . . . 71 (57) Site Evaluation - Procedures . . . . . . . . . . . . . . 71 (21, 214, 27-29) Split Waste Systems . . . . . . . . . . . . . . . . . . 71 (79) Standard Subsurface System . . . . . . . . . . . . . . . 71 (47 ) Groundwater Interceptor . . . . . . . . . . . . . . 71 (48) System Sizing . . . . . . . . . . . . . . . . . . . 71 (50 ) Water Tables . . . . . . . . . . . . . . . . . . . 71 (47 ) Steep Slope System . . . . . ... . . . . . . . . . . ... 71 (76) Strength of Wastewater . . . . . . . . . . . . . . . . . 71 (50, 63, 71 ) Vii INDEX 0167 1856. TITLE Page Subdivisions . . . . . . . . . . . . . . . . . . . . . . 71 (28 ) Sumps . . . . . . . . . . . . . . . . 71 (8o), 73 (26 ) Surcharge . . . . . . . . . . . . . . 71 (25 ) Temporary Mobile Home Placement . . . . . . . . . . . . 71 (43) Tile Dewatering System . . . . . . . . . . . . . .. . . 71 71 (77) (81, 90) , 73 (21-25) Toilets . . . . . . . . . . . . . . . . . . . . . . . . (109 ) Trenches 71 (35, 55 ) Backfill . . . . . . . . . . . . . . . . . . . . . (110) Pressurized . . . . . . . . . . . . . . . . .. . . 71 (62 ) Seepage . . . . . . . . . . . . . . . . . . . . . . 71 (65 ) Standard Disposal . . . . . . . . . . . . . . . . 71 (54) Steep Slope . . . . . . . . . . ... . . . . . . . . 71 (76) Upgrading Disposal Systems . . . . . . . . . . . . . . . 71 (39) Unsealed Earth Pits for Privies . . . . . . . . . . . . 71 (81, 82), 73 (211 23) Variances . . . . . . . . . . . . . . . . . . . . . . . . 71 (1o4-112) Appeals . . . . . . . . . . . . . . . . . . . . . . 71 (111 ) Applications . . . . . . . . . . . . . . . .. . . 71 (105 ) Administrative Review . . . . . . . . . . . . . . . 71 (112) Formal . . . . . . . . . . . . . . . . . . . . . . 71 (105 ) Hardship . . . . . . . . . . . . . . . . . .. . . 71 (107 ) Hearings . . . . . . . . . . . . . . . . . . . . . 71 (109 ) Officers . . . . . . . . . . . . . . . . . . . . . 71 (108 ) Permit Issuance, Inspections, Certificate . .. . . 71 (110) Rural Area . . . . . . . . . . . . . . . . . . . . 71 (104 ) Waiver of Fees . . . . . . . . . . . . . . . . . . 71 (105 ) Vault Toilets . . . . . . . . . . . . . . . . . . . . . 71 (81), 73 (21, 24) Waste Strength . . . . . . . . . . . . . . . . . 71 (50, 63, 71 ) Water Pollution Control Facilities (WPCF) Permit . . . . 71 (18, 20, 57) WH1816.1 Revised 9/16/ 86 0167 1857 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program OREGON ADMINISTRATIVE RULES FOR OM -SITE SEWAGE DISPOSAL. CHAPTER 340, DIVISION 71 Rules pertaining to Subsurface Sewage and Alternative Disposal contained in OAR 340-71-005 thru 71-045, OAR 340-72-005 thru 72-030, OAR 340-74-004 thru 74-025 and OAR 340-75-010 thru 75-060 are repealed effective upon filing with the Secretary of State of the rules which follow (OAR 71-100 thru 71-600, 72-050 thru 72-080, and 73-025 thru 73-085). TABLES, DIAGRAMS AND APPENDICES All tables, diagrams and appendices referred to in the text of Division 71 may be found in numerical order following the text of these rules. INDIVIDUAL ON-SITE SYSTEMS 340-71-100 DEFINITIONS. As used in OAR 340, Divisions 71, 72, and 73, unless otherwise specified: (1) "Absorption Facility" means a system of open -jointed or perforated piping, alternative distribution units, or other seepage systems for receiving the flow from septic tanks or other treatment facilities and designed to distribute effluent for oxidation and absorption by the soil within the zone of aeration. (See Diagrams 1 through 7 and 14 through 17) (2) "Active Sand Dune" means wind drifted ridges and intervening valleys, pockets, and swales of sand adjacent to the beach. The sand is grayish -brown (color value of four (4) or more), with little or no horizon, color, or textured differences. Active dunes are either bare of vegetation or lack sufficient vegetation to prevent blowing of sand. (3) "Aerobic Sewage Treatment Facility" means a sewage treatment plant which incorporates a means of introducing air and oxygen into the sewage so as to provide aerobic biochemical stabilization during a detention period. (4) "Agent" means the Director or that person's authorized representative. (5) "Alteration" means expansion and/or change in location of an existing system, or any part thereof. SSRULE (9-16-86) 71-1 On --Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 010"1 1858 (6) "Alternative System" means any Commission approved on-site sewage disposal system used in lieu of the standard subsurface system. (7) "Authorization Notice" means a written document issued by the Agent which establishes that an existing on-site sewage disposal system appears adequate to serve the purpose for which a particular application is made. (8) "Authorized Representative" means the staff of the Department of Environmental Quality or staff of the local governmental unit performing duties for and under agreement with the Department of Environmental Quality. (9) "Automatic Siphon" means a hydraulic device designed to rapidly discharge the contents of a dosing tank between predetermined water or sewage levels. (10) "Bedroom" means any room within a dwelling which is accepted as such by the State of Oregon Department of Commerce building codes representative or the local authorized building official having jurisdiction. (11) "Black Waste" means human body wastes including feces, urine, other extraneous substances of body origin and toilet paper. (12) 'Building Sewer" means that part of the system of drainage piping which conveys sewage into a septic tank, cesspool or other treatment facility that begins five feet (5) outside the building or structure within which the sewage originates. (See Diagrams 1, 2, 3, and 16) (13) "Cesspool" means a lined pit which receives raw sewage, allows separation of solids and liquids, retains the solids and allows liquids to seep into the surrounding soil through perforations in the lining. (See Diagram 16) (14) "Chemical Recirculating Toilet Facility" means a toilet facility wherein black wastes are deposited and carried from the bowl by a combination of liquid waste and water which has been chemically treated and filtered. (15 ) "Chemical Toilet Facility" means a non -flushing. non - recirculating toilet facility wherein black wastes are deposited directly into a chamber containing a solution of water and chemical. (16) "Clayey Soil" means mineral soil that is over forty (40) percent clay that shrinks and develops wide cracks when dry and swells and shears when rewet forming slickensides and wedge-shaped SSRULE (9-16-86) 71-2 On --Site Sewage Disposal 0107 1859 , DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program structure. Clayey soil is very hard or extremely hard when dry, very firm when moist, and very sticky and very plastic when wet. (17) "Claypan" means a dense, compact clay layer in the subsoil. It has a much higher clay content than the overlying soil horizon from which it is separated by an abrupt boundary. Claypans are hard when dry and very sticky and very plastic when wet. They impede movement of water and air and growth of plant roots.. (18) "Combustion Toilet Facility" means a toilet facility wherein black wastes are deposited directly into a combination chamber for incineration. (19) "Commercial Facility" means any structure or building, or any portion thereof, other than a single—family dwelling. (20) "Commission" means the Environmental Quality Commission. (21) "Community System" means an on—site system which will serve more than one (1) lot or parcel or more than one (1) condominium unit or more than one (1) unit of a planned unit development. (22) "Completed Application" means one in which the application form is completed in full, is signed by the owner or that person's authorized representative, is accompanied by all required exhibits and required fee. (23) "Conditions Associated With Saturation" means: (a) Reddish brown or brown soil horizons with gray (chromas of two (2) or less) and red or yellowish red mottles; or (b) Gray soil horizons, or gray soil horizons with red, yellowish red, or brown mottles; or (c) Dark colored highly organic soil horizons; or (d) Soil profiles with concentrations of soluble salt at or near the ground surface. (24) "Confining Layer" means a layer associated with an aquifer that because of its low permeability does not allow water to move through it perceptibly under head differences occuring in the groundwater system. (25) "Construction" means installation of a new system or part thereof, or the alternation or repair of an existing system. (26) "Conventional Sand Filter" means a filter with two (2) feet or more of medium sand designed to filter and biologically treat - SSRULE (9-16-86) 71-3 On—Site Sewage Disposal 0107 1860 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program septic tank or other treatment unit effluent from a pressure distribution system at an application rate not to exceed one and twenty-three hundredths (1.23) gallons per square foot sand surface area per day applied at a dose not to exceed twenty (20) percent of the projected daily sewage flow per cycle. (27) "Curtain Drain" means a groundwater interceptor. (28) "Cut -Manmade" means a land surface resulting from mechanical land shaping operations where the modified slope is greater than fifty (50) percent, and the depth of cut exceeds thirty (30) inches. (29) "Department" means the Department of Environmental Quality. (30) "Director" means the Director of the Department of Environmental Quality. (31) "Disposal Area" means the entire area used for underground dispersion of the liquid portion of sewage including the area designated for the future replacement system. It may consist of a seepage pit or of a disposal field or of a combination of the two. It may also consist of a cesspool, seepage bed, bottomless sand filter, or evapotranspiration- absorption system. (32) "Disposal Field" means a system of disposal trenches or a seepage trench or system of seepage trenches. (33) "Disposal Trench" means a ditch or trench with vertical sides and substantially flat bottom with a minimum of twelve (12) inches of clean, coarse filter material into which a single distribution pipe has been laid, the trench then being backfilled with a minimum of six (6) inches of soil. (See Diagram 12) (34) "Distribution Boa" means a watertight structure which receives septic tank or other treatment facility effluent and distributes it concurrently into two (2) or more header pipes leading to the disposal area. (See Rule 340-73-035.) (35) "Distribution Pipe" means an open -jointed or perforated pipe used in the dispersion of septic tank or other treatment facility effluent into disposal trenches, seepage trenches, or seepage beds. ( See Diagrams 1 through 7 and 11) (36) "Distribution Unit" means a distribution box, dosing tank, diversion valve or box, header pipe, or other means of transmitting septic tank or other treatment unit effluent from the effluent sewer to the distribution pipes. (See Diagrams 1 through 7 and 11) SSRULE (9-16-86) 71-4. On --Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (37) "Diversion Valve" means a watertight structure which receives septic tank or other treatment facility effluent through one (1) inlet, distributes it to two (2) outlets, only one (1) of which is utilized at a given time (See Diagram 11 and Rule 340-73-045.) (38) "Dosing Tank" means a watertight receptacle placed after a septic tank or other treatment facility equipped with an automatic siphon or pump designed to discharge treated effluent at a rate not to exceed twenty (20) percent of the projected daily sewage flow. (39) "Dosing Septic Tank" means a unitized device performing functions of both a septic tank and a dosing tank. (40) "Dwelling" means any structure or building, or any portion thereof which is used, intended, or designed to be occupied for human living purposes including, but not limited to: houses, houseboats, boathouses, mobile homes, travel trailers, hotels, motels, and apartments. (41) "Effective Seepage Area" means the sidewall area within a disposal trench or a seepage trench from the bottom of the trench to a level two (2) inches above the distribution pipes, or the sidewall area of any cesspool, seepage pit, unsealed earth pit privy, or gray water waste disposal sump seepage chamber; or the bottom area of a pressurized soil absorption facility installed in soil as defined in section (114) of this rule. (See Diagrams 12, 14, 15, 16, and.17) (42) "Effective Soil Depth" means the depth of soil material above a layer that impedes movement of water, air, and growth of plant roots. Layers that differ from overlying soil material enough to limit effective soil depth are hardpans, claypans, fragipans, compacted soil, bedrock, saprolite, and clayey soil. (43) "Effluent Lift Pump" means a pump used to lift septic tank or other treatment facility effluent to a higher elevation. (See Rule 340-73-055) (44) "Effluent Sewer" means that part of the system of drainage piping that conveys partially treated sewage from a septic tank or other treatment facility into a distribution unit or an absorption facility. (See Diagrams 1 through 7, 11, and 17, and Rule 340-73-060) (45) "Emergency Repair" means repair of a failing system where immediate action is necessary to relieve a situation in which SSRULE (9-16-86) 71-5 On -Site -Sewage Disposai 0107 1862 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program sewage is backing up into a dwelling or building, or repair of a broken pressure sewer pipe. (46) "Escarpment" means any naturally occurring slope greater than fifty (50) percent which extends vertically six (6) feet or more as measured from toe to top, and which is characterized by a long cliff or steep slope which separates two (2) or more comparatively level or gently sloping surfaces, and may intercept one (1) or more layers that limit effective soil depth. (See Diagrams 18 and 19) (47) "Evapotranspiration -Absorption (ETA) System" means an alternative system consisting of a septic tank or other treatment facility, effluent sewer and a disposal bed or disposal trenches, designed to distribute effluent for evaporation, transpiration by plants, and by absorption into the underlying soil. (See Diagrams 6 and 7) (48) "Existing On -Site Sewage Disposal System" means any installed on- site sewage disposal system constructed in conformance with the rules, laws and local ordinances in effect at the time of construction. or which would have conformed substantially with system design _provided for in Commission. State Board of Health or State Health Division rules. (49) "Existing System" means "Existing On -Site Sewage Disposal System". (50) "Failing System" means any system which discharges untreated or incompletely treated sewage or septic tank effluent directly or indirectly onto the ground surface or into public waters. (51) "Family Member" means any one (1) of two (2) or more persons related by blood or marriage. (52) "Filter Fabric" means a woven or spun -bonded sheet material used to impede or prevent the movement of sand, silt and clay into filter material. A specification for filter fabric is found in OAR 340-73-041. (53) "Filter Material" means clean, washed gravel ranging from three quarters (3/4) to two and one-half (2-1/2) inches in size, or clean crushed rock ranging in size from one and one-half (1-1/2) to two and one-half (2-1/2) inches. (See Diagrams 6, 7, 9, 12, 14, 15, 16, and 17) (54) "Five -Day Biochemical Oxygen Demand" (BODS) means the.quantity of oxygen used in the biochemical oxidation of organic matter in five days at twenty (20) degrees centigrade under specified conditions and reported as milligrams per liter (mg/L). SSRULE (9-16-86) 71-6 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (55) "Fragipan" means a loamy subsurface horizon with high bulk density relative to the horizon above, seemingly cemented when dry, and weakly to moderately brittle when moist. Fragipans are mottled and low in organic matter. They impede movement of water, air,. and growth of plant roots. (56) "Governmental Unit" means the state or any county, municipality, or political subdivision, or any agency thereof. (57) "Grade" means the rate of fall or drop in inches per foot or percentage of fall of a pipe. (58) "Gray Water" means household sewage other than "black wastes", such as bath water, kitchen waste water and laundry wastes. (59) "Groundwater Interceptor" means any natural or artificial groundwater or surface water drainage system including agricultural drain tile, cut banks, and ditches which intercept and divert groundwater or surface water from the area of the absorption facility. (See Diagram 13) (60) "Hardpan" means a hardened layer in soil caused by cementation of soil particles with either silica, calcium carbonate, magnesium carbonate, or iron and/or organic matter. The hardness does not change appreciably with changes in moisture content. Hardpans impede movement of water and air and growth of plant roots. (61) "Header Pipe" means a tight jointed part of the sewage drainage conduit which receives septic tank effluent from the distribution box, or drop -box, or effluent sewer and conveys it to the disposal area. (See Diagrams 1 through 5. 7, 11, and 17) (62) "Headwall" means a steep slope at the head or upper end of a land slump block or.unstable landform. (See Diagrams 22 and 23) (63) "Holding Tank" means a watertight receptacle designed to receive and store sewage to facilitate disposal at another location. (64) "Incinerator Toilet Facility" means "Combustion Toilet Facility". (65) "Individual SysteoL" means a system that is not a community -system. (66) "Individual Water Supply" means a source of water and a distribution system which serves a residence or user for the purpose of supplying water for drinking, culinary, or household uses and which is not a public water supply system. SSRULE (9-16-86) 71-7 on—Site Sewage Disposal 0107 1804 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (67) "Industrial Waste" means any liquid, gaseous, radioactive, or solid waste substance or a combination thereof resulting from any process of industry, manufacturing, trade, or business, or from the development or recovery of any natural resources. (68) "Intermittent Stream" means any surface public water or groundwater interceptor that continuously flows water for a period of greater than two months in any one year, but not continuously for that year. (69) "Invert" is the lowest portion of the internal cross section of a pipe or fitting. (See Diagram 12) (70) "Large System" means any onsite system with a projected daily sewage flow greater than two thousand five hundred (2,500) gallons. (71) "Lateral Pipe" means "Distribution Pipe". (72) "Mechanical Oxidation Sewage Treatment Facility" means an aerobic sewage treatment facility. (73) "Medium Sand" means a mixture of sand with 100 percent passing the 3/8 inch sieve, 90 percent to 100 percent passing the No. 4 sieve, 62 percent to 100 percent passing the No. 10 sieve, 45 percent to 82 percent passing the No. 16 sieve, 25 percent to 55 percent passing the No. 30 sieve, 5 percent to 20 percent passing the No. 50 sieve, 10 percent or less passing the No. 60 sieve, and 4 percent or less passing the No. 100 sieve. (74) "Nonwater-Carried Waste Disposal Facility" means any toilet facility which has no direct water connection, including pit privies, vault privies and portable toilets. (75) "Occupant" means any person living or sleeping in a dwelling. (76) "Om -Site Sewage Disposal System" means any existing or proposed on-site sewage disposal system including, but not limited to a standard subsurface, alternative, experimental or non -water carried sewage disposal system, installed or proposed to be installed on land of the owner of the system or on other land as to which the owner of the system has the legal right to install the system. (77) "Owner" means any person who alone, or jointly, or severally with others: (a) Has legal title to any single lot, dwelling, dwelling unit, or commercial facility; or SSRULE (9-16-86) 71-8 On -Site Sewage Disposal 0107 1865 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (b) Has care, charge, or control of any real property as agent, executor, executrix, administrator, administratrix. trustee, commercial lessee, or guardian of the estate of the holder of legal title; or (c) Is the contract purchaser of real property. NOTE: Each such person as described in subsections (b) and (c), thus representing the legal title holder, is bound to comply with the provisions of these rules as if he were the legal title holder. (78) "Permanent Groundwater Table" means the upper surface of a saturated zone that exists year-round. The thickness of the saturated zone, and, as a result, the elevation of the permanent groundwater table may fluctuate as much as twenty (20) feet or more annually; but the saturated zone and associated permanent groundwater table will be present at some depth beneath land surface throughout the year. (79) "Permit" means the written document issued and signed by the Agent which authorizes the permittee to install a system or any part thereof, which may also require operation and maintenance of the system. (80) "Person" includes individuals, corporations, associations, firms, partnerships, joint stock companies, public and municipal corporations, political subdivisions, the state and any agencies thereof, and the federal government and any agencies thereof. (81) "Pollution" or "Water Pollution" means such alteration of the physical, chemical or biological properties of any waters of the state, including change in temperature, taste, color, turbidity, silt or odor of the waters, or such discharge of any liquid, gaseous, solid, radioactive or other substance into any waters of the state, which will or tends to, either by itself or in connection with any other substance, create a public nuisance or which will or tends to render such waters ha= ful, detrimental or injurious to public health, safety or welfare, or to domestic, commercial, industrial, agricultural, recreational or other legitimate beneficial uses or to livestock, wildlife, fish or. other aquatic life or the habitat thereof. (82) "Portable Toilet Shelter" means any readily relocatable structure built to house a toilet facility. (83) "Pressure Distribution Lateral" means piping and fittings in pressure distribution systems which distribute septic tank or SSRULE (9-16-86) 71-9 On -Site Sewage Disposal 6167 1 866. Water Quality Program ' other treatment unit effluent to filter material through small diameter orifices. (See Diagrams 8, 9, and 12) (84) "Pressure Distribution Manifold" means piping and fittings in a pressure distribution system which supply effluent from pressure transport piping to pressure distribution laterals. (See Diagrams 8and 9) (85) "Pressure Distribution Systea" means any system designed to uniformly distribute septic tank or other treatment unit effluent under pressure in an absorption facility or sand filter. (See Diagrams 8 and 9) (86) "Pressure Transport Piping" means piping which conveys septic tank or other treatment unit effluent to a pressure distribution manifold by means of a pump. (See Diagrams 8 and 9) (87) "Prior Approval" means a written approval for on-site sewage disposal, for a specific lot, issued prior to January 1, 1974. (88) "Prior Construction Permit" means a subsurface sewage disposal system construction permit issued prior to January 1, 1974, by a county that had an ordinance requiring construction permits for subsurface sewage disposal systems. (89) "Privy" means a structure used for disposal of human waste without the aid of water. It consists of a shelter built above a pit or vault in the ground into which human waste falls. (90) "Public Health Hazard" means a condition whereby there are sufficient types and amounts of biological, chemical or physical, including radiological, agents relating to water or sewage which are likely to cause human illness, disorders or disability. These include, but are not limited to, pathogenic viruses, bacteria, parasites, toxic chemicals, and radioactive isotopes. (91) "Public Waters" means lakes, bays, ponds, impounding reservoirs, springs, wells, rivers, streams, creeks, estuaries, marshes, inlets, canals, the Pacific Ocean within the territorial limits of the State of Oregon, and all other bodies of surface or underground waters, natural or artificial, inland or coastal, fresh or salt, public or private (except those private waters which do not combine or effect a junction with natural surface or underground waters), which are wholly or partially within or bordering the state or within its jurisdiction. (92) "Redundant Disposal Field Syste=" means a system in which two complete disposal systems are installed, the disposal trenches of each system alternate with each other and only one system operates at a given time. (See Diagram 11) SSRULE (9-16-86) 71-10 On -Site Sewage Disposal 0107 1807 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality rogram (93) "Repair" means installation of all portions of a system necessary to eliminate a public health hazard or pollution of public waters created by a failing system. Major repair is defined as the replacement of the soil absorption system. Minor repair is defined as the replacement of a septic tank, broken pipe, or any part of the on-site sewage disposal system except the soil absorption system. (94) "Sand Filter Surface Area" means the area of the level plane section in the medium sand horizon of a conventional sand filter located two (2) feet below the bottom of the filter material containing the pressurized distribution piping. (95) "Sand Filter System" means the combination of septic tank or other treatment unit, dosing system with effluent pump and controls, or dosing siphon, piping and fittings, sand filter, and absorption facility used to treat and dispose of sewage. (96) "Sanitary Drainage System" means that part of the system of drainage piping that conveys untreated sewage from a building or structure to a septic tank or other treatment facility, service lateral at the curb or in the street or alley, or other disposal terminal holding human or domestic sewage. The sanitary drainage system consists of a building drain or building drain and building sewer. (See Diagrams 1, 2, 3, and 16) (97) "Saprolite" means weathered material underlying the soil that grades from soft thoroughly decomposed rock to rock that has been weathered sufficiently so that it can be broken in the hands or cut with a knife. It does not include hard bedrock or hard fractured bedrock. It has rock structure instead of soil structure. (98) "Saturated Zone" means a three (3) dimensional layer, lens, or other section of the subsurface in which all open spaces including joints, fractures, interstitial voids, pores, etc. are filled with groundwater. The thickness and extent of a saturated zone may vary seasonally or periodically in response to changes in the rate or amount of groundwater recharge or discharge. (See Diagram 20) (99) "Scum" means a mass of sewage solids floating at the surface of sewage which is buoyed up by entrained gas, grease, or other substances._. (100) "Seepage Area" means "Effective Seepage Area." (101) "Seepage Bed" means an absorption system having disposal trenches wider than three (3) feet. SSRULE (3/11/88) 71-11 On -Site Sewage Disposal 11'H980 0107 1868 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (102) "Seepage Pit" means a "cesspool" which has a treatment facility such as a septic tank ahead of it. (See Diagram 17) (103) "Seepage Trench System" means a system with disposal trenches with more than six (6) inches of filter material below the distribution pipe. (104) "Self -Contained Nonwater-Carried Waste Disposal Facility" includes, but is not limited to, vault privies, chemical toilets, combustion toilets, recirculating toilets, and portable toilets, in which all waste is contained in a watertight receptacle. (105) "Septic Tank" means a watertight receptacle which receives sewage from a sanitary drainage system, is designed to separate solids from liquids, digest organic matter during a period of detention, and allow the liquids to discharge to a second treatment unit or to a soil absorption facility. (See Rules 340-73-025 and 340-73-030.) (106) "Septic Tank Effluent" means partially treated sewage which is discharged from a septic tank. (107) "Sewage" means water -carried human wastes, including kitchen, bath, and laundry wastes from residences, buildings, industrial establishments, or other places, together with such groundwater infiltration, surface waters, or industrial waste as may be present. (108) "Sewage Disposal Service" means: (a) The installation of on-site sewage disposal systems (including the placement of portable toilets), or any part thereof; or (b) The pumping out or cleaning of on-site sewage disposal systems (including portable toilets), or any part thereof: or (c) The disposal of material derived from the pumping out or cleaning of on-site sewage disposal systems (including portable toilets); or (d) Grading, excavating, and earth -moving work connected with the operations described in subsection (a) of this section, except streets, highways, dams, airports or other heavy construction projects and except earth -moving work performed under the supervision of a builder or contractor in connection with and at the time of the construction of a building or structure; or SSRULE (3/11/88) 71-12 On -Site Sewage Disposal 71H980 0107 1869 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (e) The construction of drain and sewage lines from five (S) feet outside a building or structure to the service lateral at the curb or in the street or alley or other disposal terminal holding human or domestic sewage. (109) "Sewage Stabilization Pond" means a pond designed to receive the raw sewage flow from a dwelling or other building and retain that flow for treatment without discharge. (110) "Slope" means the rate of fall or drop in feet per one hundred (100) feet of the ground surface. It is expressed as percent of grade. (111) "Soil Permeability Rating" refers to that quality of the soil that enables it to transmit water or air, as outlined in the United States Department of Agriculture Handbook, Number 18, entitled Soil Survey Manual. (112) "Soil Separate" means the size of soil particles according to Table 7. (113) "Soil Texture" means the amount of each soil separate in a soil mixture. Field methods for judging the texture of a soil consist of forming a cast of soil, both dry and moist, in the hand and pressing a ball of moist soil between thumb and finger. (a) The major textural classifications are defined as follows: (See Table 6.) (A) Sand: Individual grains can be seen and felt readily. Squeezed in the hand when dry, this soil will fall apart when the pressure is released. Squeezed when moist, it will form a cast that will hold its shape when the pressure is released, but will crumble when touched. (B) Sandy loam: Consists largely of sand, but has enough silt and clay present to give it a small amount of stability. Individual sand grains can be readily seen and felt. Squeezed in the hand when dry, this soil will readily fall apart when the pressure is released. Squeezed when moist, it forms a cast that will not only hold its shape when the pressure is released, but will withstand careful handling without breaking. The stability of the moist cast differentiates this soil from sand. (C) Loam: Consists of an even mixture of the different sizes of sand and of silt and clay. It is easily SSRULE (3/11/88) 1.-13 On -Site Sewage Disposal :,:H980 0107 1870 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program crumble.d when dry and has a slightly gritty, yet fairly smooth feel. It is slightly plastic. Squeezed in the hand when dry, it will form a cast that will withstand careful handling. The cast formed of moist soil can be handled freely without breaking. (D) Silt loam: Consists of a moderate amount of fine grades of sand, a small amount of clay, and a large quantity of silt particles. Lumps in a dry, undisturbed state appear quite cloddy, but they can be pulverized readily; the soil then feels soft and floury. When wet, silt loam runs together in puddles. Either dry or moist, casts can be handled freely without breaking. When a ball of moist soil is pressed between thumb and finger, it will not press out into smooth, unbroken ribbon, but will have a broken appearance. (E) Clay loam: Consists of an even mixture of sand, silt, and clay, which breaks into clods or lumps when dry. When a ball of moist soil is pressed between the thumb and finger, it will form a thin ribbon that will readily break, barely sustaining its own weight. The moist soil is plastic and will form a cast that will withstand considerable handling. (F) Silty clay loam: Consists of a moderate amount of clay, a large amount of silt, and a small amount of sand. It breaks into moderately hard clods or lumps when dry. When moist, a thin ribbon or one-eighth (1/8) inch wire can be formed between thumb and finger that will sustain its weight and will withstand gentle movement. (G) Silty clay: Consists of even amounts of silt and clay and very small amounts of sand. It breaks into hard clods or lumps when dry. When moist, a thin ribbon or one-eighth (1/8) inch or less sized wire formed between thumb and finger will withstand considerable movement and deformation. (H) Clay: Consists of large amounts of clay and moderate tc small amounts of sand. It breaks into very hard clods or lumps when dry. When moist, a thin, long ribbon or one -sixteenth (1/16) inch wire can be molded with ease. Fingerprints will show on the soil, and a dull to bright polish is made on the soil by a shovel. SSRULE (3/11/88) 71-14 On -Site Sewage Disposal :H98O 0107 1871 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (b) These and other soil textural characteristics are also defined as shown in the United States Department of Agriculture Textural Classification Chart which is hereby adopted as part of these rules. This textural classification chart is based on the Standard Pipette Analysis as defined in the United States Department of Agriculture, Soil Conservation Service Soil Survey Investigations Report No. 1. (See Table 6) (114) "Soil With Rapid or Very Rapid Permeability" means: (a) Soil which contains thirty-five (35) percent or more of coarse fragments two (2) millimeters in diameter or larger by volume with intersticial soil of sandy loam texture or coarser as defined in subsection (113) (a) of this rule and as classified in Soil -Textural Classification Chart, Table 6; or (b) Coarse textured soil (loamy sand or sand as defined in section (113) of this rule and as classified in Soil Textural Classification Chart, Table 6); or (c) Stones, cobbles, gravel, and rock fragments with too little soil material to fill interstices larger than one (1) millimeter in diameter. (115) "Stabilized Dune" means a sand dune that is similar to an active dune except vegetative growth is dense enough to prevent blowing of sand. The surface horizon is either covered by a mat of undecomposed and partially decomposed leaves, needles, roots, twigs, and moss, etc., or to a depth of at least six (6) inches contains roots and has a color value of three (3) or less. (116) "Standard Subsurface System" means an on-site sewage disposal system consisting of a septic tank, distribution unit and gravity -fed absorption facility constructed in accordance with OAR 340-71-220(2), using six (6) inches of filter material below the distribution pipe, and maintaining not less than eight (8) feet of undisturbed earth between disposal trenches. (117) "Strength of Wastewater" means the concentration of pollutants in wastewater as measured by BODSand TSS. (118) "Subsurface Sewage Disposal" means the physical, chemical or bacteriologiQal breakdown and aerobic treatment of sewage in the unsaturated zone of the soil above any temporarily perched groundwater body. SSRULE (3/11/88) 71-15 On -Site Sewage Disposal 'NH980 0107 18'72 . DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (119) "Subsurface Disposal System" means a cesspool or the combination of a septic tank or other treatment unit and effluent sewer and absorption facility. (See Diagrams 1, through 6, 11, 16, and 17) (120) "System" means "On -Site Sewage Disposal System." (121) "Temporary Groundwater Table" means the upper surface of a saturated zone that exists only on a seasonal or periodic basis. Like a permanent groundwater table, the elevation of a temporary groundwater table may fluctuate. However, a temporary groundwater table and associated saturated zone will dissipate (dry up) for a period of time each year. (122) "Test Pit" means an open pit dug to sufficient size and depth to permit thorough examination of the soil to evaluate its suitability for subsurface sewage disposal. (123) "Toilet Facility" means a fixture housed within a toilet room or shelter for the purpose of receiving black waste. (124) "Total Suspended Solids" (TSS) means solids in sewage that can be removed readily by standard filtering procedures in a laboratory and reported as milligrams per liter (mg/L). (125) "Unstable Landforms" means areas showing evidence of mass downslope movement such as debris flow, landslides, rockfalls, and hummocky hillslopes with undrained depressions upslope. Unstable landforms may exhibit slip surfaces roughly parallel to the hillside; landslide scars and curving debris ridges; fences, trees, and telephone poles which appear tilted; or tree trunks which bend uniformly as they enter the ground. Active sand dunes are unstable landforms. (See Diagrams 21, 22, and 23) (126) "Water Pollution" means "Pollution". (127) "Zone of Aeration" means the unsaturated zone that occurs below the ground surface and above the point at which the upper limit of the water table exists. (See Diagram 20) SSRULE (3/11/88) 71-16 On -Site Sewage Disposal '.-;'tM o 0107 1873 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-110 PURPOSE. These rules, adopted pursuant to ORS 454.625, prescribe the requirements for the construction, alteration, repair, operation, and maintenance of on- site sewage disposal systems. Their purpose is to restore and maintain the quality of public waters and to protect the public health and general welfare of the people of the.State of Oregon. SSRULE 9-16-86 71-17 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 0107 1874 340-71-120 JURISDICTION AND POLICY. (1) Prior to July 1, 1981, unless otherwise required within these rules, county agreements with the Department under ORS 454.725 shall be renegotiated to provide for county responsibility for receiving and processing applications, issuing permits and performing required inspections for all on-site systems. The Department shall assume those responsibilities in nonagreement counties. The division of responsibilities, by projected daily sewage flow, is set forth as follows: (a) Systems of twenty five hundred (2500) gallons or less shall have site evaluations, plan review, permits and inspections conducted or processed by the Agent, unless otherwise required within these rules. Plan review may be done by the Department at Agent's request. (b) Systems of twenty five hundred and one (2501) gallons to five thousand (5000) gallons shall have site evaluations, plan review, permits and inspections conducted or processed by the Department. Site evaluations, permit issuance and inspections may be delegated to the Agent. (c) Systems of five thousand and one (5001) gallons or larger shall have site evaluations, plan review, permits and inspection conducted or processed by the Department. The permit shall be a Water Pollution Control Facilities (WPCF) permit. For systems of this size, periodic inspections may be delegated to the Agent. (2) Each and every owner of real property is jointly and severally responsible for: (a) Disposing of sewage on that property in conformance with the rules of this Division; and (b) Connecting all plumbing fixtures on that property, from which sewage is or may be discharged, to a sewerage or on- site sewage disposal system approved by the Department; and (c) Maintaining, repairing, and/or replacing the system as necessary to assure proper operation of the system. (3) Agreement counties may, by ordinance, adopt requirements for operation and maintenance of systems within that county. Such requirements must be approved by the Director. (4) The Commission may, by rule impose operation and maintenance requirements on specified types and/or sizes of systems. SSRULE (9-16-86) 71-18 Orr. -Site Sewage Disposal 0107 1875 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-130 GENERAL STANDARDS. PROHIBITIONS AND REQUIREMENTS. (1) Public Waters or Public Health Hazards. If. in the judgment of the Agent, proposed operation of a system would cause pollution of public waters or create a public health hazard, system installation or use shall not be authorized. (2) Approved Disposal Required. All sewage shall be treated and disposed of in a manner approved by the Department. (3) Discharge of Sewage Prohibited. Discharge of untreated or partially treated sewage or septic tank effluent directly or indirectly onto the ground surface or into public waters constitutes a public health hazard and is prohibited. (4) Discharges Prohibited. No cooling water, air conditioning water, water softener brine, ground water, oil, hazardous materials or roof drainage shall be discharged into any system. (5) Increased Flows Prohibited. Except where specifically allowed within this -Division, no person shall connect a dwelling or commercial facility to a system if the total projected sewage flow would be greater than that allowed under the original system construction permit. (6) System Capacity. Each system shall have adequate capacity to properly treat and dispose of the maximum projected daily sewage flow. The quantity of sewage shall be determined from Table 2 or other information the Agent determines to be valid that may show different flows. (7) Material Standards. All materials used in on-site systems shall comply with standards set forth in these rules. (8) Encumbrances. A permit to install a new system can be issued only if each site has received an approved site evaluation (OAR 340-71-150) and is free of encumbrances (i.e.. easements, deed restrictions, etc.) which could prevent the installation or operation of the system from being in conformance with the rules of this Division. (9) Future Connection to Sewerage System. In areas where a district has been formed to provide sewerage facilities placement of house plumbing to facilitate connection to the sewerage system shall be encouraged. (10) Plumbing Fixtures Shall be Connected. All plumbing fixtures in dwellings and commercial facilities from which sewage is or may be discharged, shall be connected to, and shall discharge into an SSRULE (9-16-86) 71-19 On -Site Sewage Disposal 0167 1S76, DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program approved areawide sewerage system, or an approved on—site system which is not failing. (11) Property Line Crossed. (a) A recorded utility easement and covenant against conflicting uses, on a form approved by the Department, is required whenever a system crosses a property line separating properties under different ownership. The easement must accommodate that part of the system, including setbacks, which lies beyond the property line, and must allow entry to install, maintain and repair the system. (b) Whenever an on—site system is located on one lot or parcel and the facility it serves is on another lot or parcel under the same ownership. the owner shall execute and record in the county land title records, on a form approved by the Department, an easement and a covenant in favor of the State of Oregon: (A) Allowing its officers, agents, employees and representatives to enter and inspect, including by excavation. that portion of the system, including setbacks, on the other lot or parcel; and (B) Agreeing not to put that portion of the other lot or parcel to a conflicting use; and (C) Agreeing that upon severance of the lots or parcels, to grant or reserve and record a utility easement, in a form approved by the Department, in favor of the owner of the lot or parcel served by the system. (12) Replacement Area. Except as provided in specific rules, system replacement area shall be kept vacant, free of vehicular traffic and soil modification. (13) Operation and Maintenance. All systems shall be operated and maintained so as not to create a public health hazard or cause water pollution. (14) Operating Permit Requirements. Systems with a projected daily sewage flow greater than five thousand (5,000) gallons shall be constructed and operated under a Water Pollution Control Facilities (WPCF) Permit. (15) No person shall dispose of sewage or septage (septic tank pumpings) in any location not authorized by the Department under applicable laws and rules for such disposal. SSRIILE(9-16-861-71-20 On --Site Sewage Disposal 0107 1877 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Ouality Proeraa 340-71-140 FEES -- GENERAL. (1) Except as provided in section (5) of this rule, the following nonrefundable fees are required to accompany applications for site evaluations, permits, licenses and services provided by the Department. ON-SITE MAXIMUM SEWAGE DISPOSAL SYSTEMS FEE (a) New Site Evaluation: (A) Single Family Dwelling: (i) First Lot ............................... $245 (ii) Each Additional Lot Evaluated During Initial Visit .......................... $205 (B) Commercial Facility System: (i) For First One Thousand (1000) Gallons Projected Daily Sewage Flow ........... $245 (ii) Plus For Each Five Hundred (500) Gallons or Part Thereof Above One Thousand (1000) Gallons, for Projected Daily Sewage Flows up to Five Thousand (5,000) Gallons ........................ $ 75 (C) Site Evaluation Report Review ................ $200 (D) Fees for site evaluation applications made to an agreement county shall be in accordance with that county's fee schedule.. (E) Each fee paid for a site evaluation report entitles the applicant to as many site inspections on a single parcel or lot as are necessary to determine site suitability for a single system. The applicant may request additional site inspections within ninety (90) days of the initial site evaluation, at no extra cost. (F) Separate fees shall be required if site inspections are to determine site suitability for more than one (1) system on a single parcel of land. (b) Construction -Installation Permit: SSRULE.1 (6-14-91 71-21 On -Site Sewage Disposal 0107 X8"78 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (A) For First One Thousand (1000) Gallons Projected Daily Sewage Flow: (i) Standard On -Site System ............... $245 (ii) Alternative System: (I) Aerobic System ................. $245 (II) Capping Fill ................... $415 (III) Cesspool ....................... $245 (IV) Disposal Trenches in Saprolite... $245 (V) Evapotranspiration -Absorption... $245 (VI) Gray Water Waste Disposal Sump.. $120 (VII) Holding Tank ................... $245 (VIII) Pressure Distribution .......... $350 (IX) Redundant ....................... $245 (X) Sand Filter .................... $445 (XI) Seepage Pit .................... $245 (XII) Seepage Trench ................. $245 (XIII) Steep Slope .................... $245 (XIV) Tile Dewatering ................ $350 (iii) At the discretion of the Agent, the permittee may be assessed a reinspection fee, not to exceed $25, when a-precover inspection correction notice requires correction of improper construction and, at a subsequent inspection, the Agent finds system construction deficiencies have not been corrected. The Agent may elect not to make further precover inspections until the reinspection fee is paid. (iv) With the exceptions of sand filter and pressure distribution systems, a $25 fee may be added to all permits that specify the use of a pump or dosing siphon. (B) For systems with projected daily sewage flows greater than one thousand (1,000) gallons, the Construction -Installation permit fee shall be equal to the fee required in OAR 340-71-140 (1)(b)(A) plus $15 for each five hundred (500) gallons or part thereof above one thousand (1,000) gallons. NOTE: Fees for construction permits for systems with projected daily sewage flows greater than five thousand (5,000) SSRULE J (6-14-91 71-22 On -Site Sewage Disposal 0107 1879 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program gallons shall be in accordance with the fee schedule for WPCF permits. (C) Commercial Facility System, Plan Review: (i) For a system with a projected daily sewage flow of less than six hundred (600) gallons, the cost of plan review is included in the permit application fee. (ii) For a system with a projected daily sewage flow of six hundred (600) gallons, but not more than one thousand (1,000) gallons projected daily sewage flow .......... $100 (iii) Plus for each five hundred (500) gallons or part thereof above one thousand (1,000) gallons, to a maximum sewage flow limit of five thousand (5,000) gallons perday ............................... $ 25 (iv) Plan review for systems with projected sewage flows greater than five thousand (5,000) gallons per day shall be pursuant to OAR 340, Division 52. (D) Permit Renewal: (i) If Field Visit Required ............... $150 (ii) No Field Visit Required ................ $ 85 NOTE: Renewal of a permit may be granted to the original permittee if an application for permit renewal is filed prior to the original permit expiration date. Refer to OAR 340-71-160(10).. (E) Alteration Permit ............................ $245 (F) Repair Permit: (i) Single Family Dwelling: (I) Major ........................... $115 (II) Minor ........................... $ 75 (ii) Commercial Facility: SSRULE.1 (6-14-91 71-23 On -Site Sewage Disposal 0107 1880 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Proeraa r_ (I) Major -- The appropriate fees identified in paragraphs (1)(b)(A), (B), and (C) of this rule apply. SSRULE.1 (6-14-91 71-24 On -Site Sewage Disposal (II) Minor ........................... $ 75 (G) Permit Denial Review ......................... $200 (c) Authorization Notice: (A) If Field Visit Required ...................... $150 (B) No Field Visit Required ...................... $ 85 (C) Authorization Notice Denial Review ........... $200 (d) Annual Evaluation of Alternative System (Where Required) .................................. $150 (e) Annual Evaluation of Large System (2501 to 5000 GPD) ......................................... $150 (f) Annual Evaluation of Temporary or Hardship MobileHome .....................................:.. $ 90 (g) Variance to On -Site System Rules .................. $225 NOTE: The variance application fee may be waived if the applicant meets the requirements of OAR 340-71-415(5). (h) Rural Area Variance to Standard Subsurface Rules: (A) Site Evaluation .............................. $245 NOTE: In the event there is on file a site evaluation report for that parcel that is less than ninety (90) days old, the site evaluation fee shall be waived. (B) Construction -Installation Permit -- The appropriate fee identified in subsection (1)(b) of this rule applies. (i) Sewage Disposal Service: (A) Annual Business License ...................... $ 175 SSRULE.1 (6-14-91 71-24 On -Site Sewage Disposal ®107 1881 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (B) Transfer of or Amendments to License ......... $ 100 (C) Reinstatement of Suspended License ........... $ 125 (D) Pumper Truck Inspection, First Vehicle: (i) Each Inspection ........................ $ 50 (ii) Each Additional Vehicle, Each Inspection...... ...................... $ 35 (j) Experimental Systems: Permit ...................... $1,000 (k) Existing System Evaluation Report ................. $ 150 NOTE: The fee shall not be charged for an evaluation report on any proposed repair, alteration or extension of an existing system. (2) Contract County Fee Schedules. Pursuant to ORS 454.745(4), fee schedules which exceed maximum fees in ORS 454.745(1), and section (1) of this rule, are established for contract counties as follows: (a) Multnomah County: See OAR 340-72-070. (b) Jackson County: See OAR 340-72-080. (c) Linn County: See OAR 340-72-090. (3) Contract County Fee Schedules, General: (a.) Each county having an agreement with the Department under ORS 454.725 shall adopt a fee schedule for services rendered and permits to be issued. (b) A copy of the fee schedule and any subsequent amendments to the schedule shall be forwarded to the Department. (c) Fees shall not: (A) Exceed actual costs for efficiently conducted services; or (B) Exceed the maximum established in section (1) of this rule, unless approved by the Commission pursuant to ORS 454.745(4). (4) Surcharge. In order to offset a portion of the administrative costs of the statewide on-site sewage disposal program, a SSRULE.1 (6-14-91 71-25 On -Site Sewage Disposal 0107 1882 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program surcharge for each activity, as set forth in the following schedule, shall be levied by the Department and by each Agreement County. Proceeds from surcharges collected by the Department and Agreement Counties shall be accounted for separately. Each Agreement County shall forward the proceeds to the Department as negotiated in the memorandum of agreement (contract) between the county and the Department. Activity Surcharge (a) Site evaluation, for each site examined, based on a projected flow of: A. 1,000 gallons or less .................... $ 20 B. 1,001 gallons to 2,000 gallons ........... $ 40 C. 2,001 gallons to 3,000 gallons ........... $ 60 D. 3,001 gallons to 4,000 gallons ....... $ 80 E. 4,001 gallons or more .................... $100 (b) Construction -Installation Permit ............. $ 10 (c) Repair Permit ................................ $ 10 (d) -Alteration Permit ............................ $ 10 (e) Authorization Notice ......................... $ 10 (f) Existing System Evaluation Report ............. $ 10 (5) Refunds.. The Agent may refund a fee accompanying an application if the applicant withdraws the application before the Agent has done any field work or other substantial review of the application. SSRULE.1 (6-14-91 71-26 On -Site Sewage Disposal OF ENVIRONMENTAL QUALITY _ Water Qu�a�iy�P 0 340-71-150 SITE EVALUATION PROCEDURES. (1) A site evaluation is the first step in the process of obtaining a construction permit for an on-site system. Except as otherwise allowed in these rules, any person who wishes to install a new on-site sewage system shall first obtain a site evaluation report. (2) Applications for site evaluations shall be made to the Agent, on forms approved by the Department. Each application must be completed in full, signed by the owner or his legally authorized representative, and be accompanied by all required exhibits and appropriate fee. Incomplete applications shall be returned to the applicant to be completed. Unless other procedures approved by the Department are provided within a contract county, applicants shall provide at least two (2) test pits with dimensions of at least two (2) feet wide by four (4) feet long by five (5) feet deep, and located approximately seventy-five (75) feet apart and within the area of the proposed system. (3) Site Evaluation Report: (a) The Agent shall evaluate the site of the proposed system, shall consider all system options, and shall provide a report of such evaluation. (b) The site evaluation report shall be on a form approved by the Department. (c) The report shall contain, at a minimum, a site diagram and observations of the following site characteristics, if present: (A) Parcel size; (B) Slope—in disposal field and replacement areas (percent and direction); (C) Surface streams—springs—other bodies of water; (D) Existing and proposed wells; (E) Escarpments; (F) Cuts and fills; (G) Unstable landforms; (H) Soil profiles—determined from test pits provided by applicant; SSRULE.1 (9-16-86) 71-27 On -Site Sewage Disposal DEPARMENT OF ENVI Water (I) Water table levels (as indicated by conditions associated with saturation); (J) Useable area for initial and replacement disposal areas; (K) Encumbrances (applicant list on application); (L) Sewerage availability; (M) Other observations as appropriate. (d) Site evaluation reports for subdivisions or other land divisions shall be based upon an evaluation of each lot. (e) Specific conditions or limitations imposed on an approved site shall be listed on the evaluation report. (f) An approved site evaluation report assures that the property owner will receive a permit to construct a system on that property provided procedures and conditions for permit issuance found in Rule 340-71-160 are met. (4) Approval or Denial: (a) In order to obtain a favorable site -evaluation report the following conditions shall be met: (A) All criteria for approval of a specific type or types of system, as outlined in OAR 340, Division 71 shall be met. (B) Each lot or parcel must have sufficient usable area available to accommodate an initial and replacement system. The usable area may be located within the lot or parcel, or within the bounds of another lot or parcel if secured pursuant to OAR 340-71-130(11). Sites may be approved where the initial and replacement systems would be of different types, e.g., a standard subsurface system as the initial system and an alternative system as the replacement system. The site evaluation report shall indicate the type of the initial and type of replacement system for which the site is approved. EXCEPTION: A replacement area is not required in areas under control of a legal entity such as a city, county. or sanitary district. provided the legal entity gives a SSRULE.1 (9-16-86) 71-28 Ov-Site Sewage Disposal 010"7 1885 DEPARTIILW OF ENVIRONMENTAL QUALITY Water Quality Program written commitment that sewerage service will be provided within five (5) years. (b) A site evaluation shall be denied where the conditions identified in subsection (4)(a) of this rule are not met. (c) Technical rule changes shall not invalidate a favorable site evaluation, but may require use of a different kind of system. •(5) Site Evaluation Report Review. A site evaluation report issued by the Agent shall be reviewed at the request of the applicant. The application for review shall be submitted to the Department in writing, within thirty (30) days of the site evaluation report issue date, and be accompanied by the review fee. The review shall be conducted and a report prepared by the Department. SSRULE.1 (9-16-86) 71-29 On -Site Sewage Disposal. ®16'7 1886 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-155 EXISTING SYSTEM EVALUATION REPORT. (1) Any person, upon application, may request an evaluation report on an existing on—site sewage disposal system. The application shall be on a form provided by the Agent and approved by the Department. (2) The application is complete only when the form, on its face, is completed in full, signed by the owner or the owner's legally authorized representative, and is accompanied by all necessary exhibits including the fee. A fee shall not be charged for an evaluation report on any proposed repair, alteration or extension of an existing system. (3) The Agent shall: (a) Examine the records, if available, on the existing system; and (b) Conduct a field evaluation of the existing system; and (c) Issue a report of findings to the applicant. SSRULE.1 (9-16-86) 71-30 On—Site Sewage Disposal 0107 188'7 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-160 PERMIT APPLICATION PROCEDURES -GENERAL REQUIREMENTS. (1) No person shall cause or allow construction, alteration, or repair of a system, or any part thereof, without first applying for and obtaining a permit. EXCEPTION: Emergency repairs as set forth in Rule 340-71-215. (2) Applications for permits shall be made on forms provided by the Agent and approved by the Department. (3) An application is complete only when the form, on its face, is completed in full, is signed by the owner or the owner's legally authorized representative, and is accompanied by all required exhibits and fee. Except as otherwise allowed in OAR 340-71- 400(6), the exhibits shall include: (a) Favorable site evaluation report. (b) Favorable land use compatibility statement from the appropriate land use authority signifying that the proposed land use is compatible with the Land Conservation and Development Commission acknowledged comprehensive plan or complies with the statewide planning goals. (c) Plans and specifications for the on-site system proposed for installation within the area identified in the favorable site evaluation report. The Agent shall determine and request the minimum level of detail necessary to insure proper system construction. (d) Any other information the Agent finds is necessary to complete the permit application. (4) The application form shall be received by the Agent only when the form is complete, as detailed in section (3) of this rule. (5) Upon receipt of a completed application the Agent shall deny the permit if: (a) The application contains false information; (b) The application was wrongfully received by the Agent; (c) The proposed system would not comply with these rules; (d) The proposed system, if constructed, would violate a Commission moratorium as described in rule 340-71-460; -SSRULE.1 (9-16-86) 71-31 On -Site Sewage Disposal 010'7 1888 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (e) The proposed system location is encumbered as described in section 340-71-130 (8) ; (f) A sewerage system which can serve the proposed sewage flow is both legally and physically available, as described below: (A) Physical Availability. A sewerage system shall be deemed physically available if its nearest connection point from the property to be served is: (i) For a single family dwelling, or other establishment with a maximum projected daily sewage flow of not more than four hundred fifty (450) gallons, within three hundred (300) feet; (ii) For a proposed subdivision or group of two (2) to five (5) single family dwellings, or equivalent projected daily sewage flow, not further than two hundred (200) feet multiplied by the number of dwellings or dwelling equivalents. (iii) For proposed subdivisions or other developments with more than five (5) single family dwellings, or equivalents, the Agent shall make a case-by- case determination of sewerage availability. EXCEPTION: A sewerage system shall not be considered available if topographic or man-made features make connection physically impractical. (B) Legal Availability. A sewerage system shall be deemed legally available if the system is not under a Department connection permit moratorium, and the sewerage system owner is willing or obligated to provide sewer service. (6) A permit shall be issued only to a person licensed under ORS 454.695, or to the owner or easement holder of the land on which the system is to be installed. (7) No person shall construct, alter or repair a system, or any part thereof, unless that person is licensed under ORS 454.695, or is the permittee. (8) The Agent shall either issue or deny the permit within twenty (20) days after receipt of the completed application. SSRULE.1 (9-16-86) ,71-32 O:r Site Sewage Disposal 010'7 1889 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program EXCEPTION: If weather conditions or distance and unavailability of transportation. prevent the Agent from acting to either issue or deny the permit within twenty (20) days. the applicant shall be notified in writing. The notification shall state the reason for delay. The Agent shall either issue or deny the permit within sixty (60) days after the mailing date of such notification. (9) A permit issued pursuant to these rules shall be effective for one (1) year from the date of issuance for construction of the system. The construction—installation permit is not transferable. Once a system is installed pursuant to the permit. and a Certificate of Satisfactory Completion has been issued for the installation. conditions imposed as requirements for permit issuance shall continue in force as long as the system is in use. (10) Renewal of a permit may be granted to the original permittee if an application for permit renewal is filed prior to the original permit expiration date. Application for permit renewal shall conform to the requirements of sections (2) and (4) of this rule. The permit shall be issued or denied consistent with sections (5). (6). (8). and (9) of this rule. SSRULE.1 (9-16-86) 71-33 On—Site Sewage Disposal DEPARTMENT 340-71-165 PERMIT DENIAL REVIEW. Ola? X890 Water Quality r gr (1) A permit denied by the Agent shall be reviewed at the request of the applicant. The application for review shall be submitted to the Department in writing. within thirty (30) days of the permit denial notice from the Agent, and be accompanied by the denial review fee. The denial review shall be conducted and a report prepared by the Department. (2) Permit denials for systems proposed to serve a commercial facility, intended to be used in a commercial activity, trade, occupation or profession, may be appealed through the contested case hearing procedure set forth in ORS 183 and OAR Chapter 340, Division 11. (3) If the Agent intends to deny a permit for a parcel of ten (10) acres or larger in size, the Agent shall: (a) Provide the applicant with a Notice of Intent to Deny; (b) Specify reasons for the intended denial; and (c) Offer a contested case hearing in accordance with ORS 183 and OAR Chapter 340, Division 11. SSRULE.1 (9-16-86) 71-34 On -Site Sewage Disposal 0107 1891 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-170 PRE -COVER INSPECTIONS. (1) When construction, alteration or repair of a system for which a permit has been issued is complete, except for backfill (cover), or as required by permit, the system installer shall notify the Agent. The Agent shall inspect the installation to determine if it complies with the rules of the Commission, unless the inspection is waived by the Agent in accordance with section (2) of this rule or in accordance with the provisions of OAR 340-71-400(6). (2) The Agent may, at his own election, waive the pre -cover inspection provided: (a) The installation is a standard subsurface system installed by a sewage disposal service licensed pursuant to ORS 454.695; and (b) The inspecting jurisdiction and the Department have developed an impartial method of identifying those installers --who have a history of proper installations without excessive numbers of corrections; and (c) Inspections waived are for installations made by installers identified as having a good history of proper installation; and (d) A list of installers whose inspections may be waived is available to the public and the Department; and (e) A representative number of each installer's systems has been inspected, regardless of installation history; and (f) After system completion the installer certifies in writing that the system complies with the rules of the Commission, and provides the Agent with a detailed as -built plan (drawn to scale) of the installation. (3) Precover inspection details shall be recorded on a form approved by the Department. SSRULE.1 (9-16-86) 71-35 On -Site Sewage Disposal 0107 1892 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-175 CERTIFICATE OF SATISFACTORY COMPLETION. (1) The Agent shall issue a Certificate of Satisfactory Completion, if, upon inspection of installation, the system complies with the rules of the Commission and the conditions of the permit. (2) If inspected installation does not comply with the rules of the Commission and the conditions of the permit, the permittee shall be notified in writing or a Correction Notice shall be posted on the site. System deficiencies shall be explained and satisfactory completion required.. Follow-up inspections may be waived by the Agent. After satisfactory completion a Certificate shall be issued. (3 ) If the inspection is not made within seven (7 ) days after notification of completion, or the inspection is waived, a Certificate of Satisfactory Completion shall be deemed to have been issued by operation of law. In such cases, a modified Certificate shall be issued to the owner. (4) A system, once installed, shall be backfilled (covered) only when: (a) The permittee is notified by the Agent that inspection has been waived; or (b) The inspection has been conducted by the Agent and a Certificate of Satisfactory Completion has been issued; or (c) A Certificate of Satisfactory Completion has been issued by operation of law where the inspection has not been conducted within seven (7) days of notification of completed installation. (5) Failure to meet requirements for satisfactory completion within thirty (30) days after written notification or posting of a .Correction Notice on the site, constitutes a violation of ORS 454.605 to 454.745 and these rules. (6) No person shall connect to or use any system. completed on or after January 1, 1974, unless a Certificate of Satisfactory Completion has been issued for the installation, or deemed issued by operation of law as provided in ORS 454.665(2). (7) Unless otherwise required by the Agent the system installer shall backfill (cover) a system within ten (10) days after issuance of a Certificate of Satisfactory Completion for that system. SSRULE.1 (9-16-86) 71-36 On -Site Sewage Disposal 010'7 1893 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (8) A Certificate of Satisfactory Completion shall be valid for a period of one (1) year, for connection of the system to the facility for which it was constructed. After the one (1) year period, rules for Authorization Notices or Alteration Permits apply, as outlined in rules 340-71-205 and 340-71-210. (9) Denial of a Certificate of Satisfactory Completion may be appealed in accordance with ORS 183.310 and OAR Chapter 340, Division 11. SSRULE.1 (9-16-86) 71-37 On -Site Savage Disposal 0107 1894 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-185 ABANDONMENT OF SYSTEMS. (1) The owner shall abandon a system when: (a) A sewerage system becomes available and the building sewer has been connected thereto; or (b) The source of sewage has been permanently eliminated; or (c) The system has been operated in violation of OAR 340-71- 130(13), unless and until a repair permit and Certificate of Satisfactory Completion are subsequently issued therefor; or (d) The system has been constructed, installed, altered, or repaired without a required permit authorizing same, unless and until a permit is subsequently issued therefor; or (e) The system has been operated or used without a required Certificate of Satisfactory Completion or Authorization Notice authorizing same, unless and until a Certificate of Satisfactory Completion or Authorization Notice is subsequently issued therefor. (2) Procedures for Abandonment: (a) The septic tank, cesspool or seepage pit shall be pumped by a licensed sewage disposal service to remove all sludge; (b) The septic tank, cesspool or seepage pit shall be filled with reject sand, bar run gravel, or other material approved by the Agent; (c) The system building sewer shall be permanently capped. (d) If. in the judgment of the Agent, it is not reasonably possible or necessary.to comply with subsections (2)(a) and (2)(b) of this rule, the Agent may waive either or both of these requirements provided such action does not constitute a menace to public health, welfare or safety. SSRULE.1 (9-16-86) 71-38 On -Site Sewage Disposal 0.0'7 1895 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-195 UPGRADING DISPOSAL SYSTEMS. When upgrading systems which approximate a pit privy and gray water discharge to the surface or to a pit, system repair rules (340-71-215) shall apply, provided: (1) The system serves an occupied dwelling; and (2) The system and dwelling were constructed prior to January 1, 1974. SSRULE.1 (9-16-86) 71-39 On—Site Sewage Disposal DEPARTMENT OF 340-71-200 PRIOR CONSTRUCTION PERKITS OR APPROVALS. (1) All construction permits and written approvals issued prior to January 1, 1974, expired by rule of the Commission on July 1, 1976, unless they met all requirements of OAR 340-71- 015(8) and were converted to Department construction permits prior to that date. (2) Converted permits required system construction prior to July 1, 1980. Any prior approvals or prior permits failing to meet the two (2) deadline dates above are void. (3) All sites now proposed for on—site systems must meet appropriate requirements of these rules. SSRULE.1 (9-16-86) 71-40 Oa --Site Sewage Disposal I ANT OF ENVIR 340-71-205 AUTHORIZATION TO USE EXISTING SYSTEMS. Water (1) For the purpose of these rules, "Authorization Notice" means a written document issued by the Agent which establishes that an existing on-site sewage disposal system appears adequate to serve the purpose for which a particular application is made. Applications for Authorization Notices shall conform to requirements of OAR 340-71-160(2) and (4). (2) Authorization Notice Required. No Person shall place into service, change the use of, or increase the projected daily sewage flow into an existing on-site sewage disposal system without obtaining an Authorization Notice, Construction - Installation Permit or Alteration Permit as appropriate. EXCEPTIONS: -a- An Authorization Notice is not required when there is a change in use (replacement of mobile homes or recreational vehicles with similar units) in mobile home parks or recreational vehicle facilities. -b- An Authorization Notice is not required for placing into service a previously unused system for which a Certificate of Satisfactory Completion has been issued within one (1) year of the date such system is placed into service, providing the projected daily sewage flow does not exceed the design flow. (3) For placing into service or for changes in the use of an existing on-site sewage disposal system where no increase in sewage flow is projected, or where the design flow is not exceeded; an Authorization Notice valid for a period not to exceed one (1) year shall be issued if: (a) The existing system is not failing; and (b) All set -backs between the existing system and the structure can be maintained; and (c) In the opinion of the Agent the proposed use would not create a public health hazard on the ground surface or in surface public waters. (4) If the conditions of section (3) of this rule cannot be met, an Authorization Notice shall be withheld until such time as the necessary alterations and/or repairs to the system are made. (5) For changes in the use of a system where projected daily sewage flow would be increased by not more than three hundred (300) SSRULE.1 (9-16-86) 71-41 Orr Site Sewage Disposal gallons beyond the design capacity or by not more than fifty (50) percent of the design capacity for the system, whichever is less; an Authorization Notice valid for a period not to exceed one (1) year shall be issued if: (a) The existing system is shown not to be failing; and (b) All set -backs between the existing system and the structure can be maintained; and (c) Sufficient area exists so that a complete replacement area meeting all requirements of these rules (except those portions relating to soil conditions and groundwater) is available; and (d) In the opinion of the Agent the proposed increase would not create a public health hazard or water pollution. (6) Only one (1) Authorization Notice for an increase up to three hundred (300) gallons beyond the design capacity, or increased by not more than fifty (50) percent of the design capacity, whichever is less, will be allowed per system. (7) For changes in the use of a system where projected daily sewage flows would be increased by more than three hundred (300) gallons beyond the design capacity, or increased by more than fifty (50) percent of the design capacity of the system, whichever is less, a Construction -Installation Permit shall be obtained. Refer to rule 340-71-210. (8) Personal Hardship: (a) The Agent may allow a mobile home to use an existing system serving another dwelling, in order to provide housing for a person suffering hardship, or for an individual providing care for such a person, by issuing an Authorization Notice, if: (A) The Agent receives satisfactory evidence which indicates that a person is suffering physical or mental impairment, infirmity, or is otherwise disabled (a hardship approval issued under local planning ordinances shall be accepted as satisfactory evidence); and (B) The system is not failing; and (C) The application is for a mobile home;.and (D) Evidence is provided that a hardship mobile home placement is allowed on the subject property by the SSRULE.1 (6-14-91) 71-42 On -Site Sewage Disposal 919'7 1899 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program governmental agency that regulates zoning, land use planning, and/or building. (b) The Authorization Notice shall remain in effect for a specified period, not to exceed cessation of the hardship. The Authorization Notice is renewable on an annual or biennial basis. The Agent shall impose conditions in the Authorization Notice which are necessary to assure protection of public health. (9) Temporary Placement: (a) The Agent may allow a mobile home to use an existing system serving another dwelling in order to provide temporary housing for a family member in need, and may issue an Authorization Notice provided: (A) The Agent receives evidence that the family member is in need of temporary housing; and (B) The system is not failing; and (C) A full system replacement area is available; and (D) Evidence is provided that a temporary mobile home placement is allowed on the subject property by the governmental agency that regulates zoning, land use planning, and/or building. (b) The Authorization Notice shall authorize use for no more than two (2) years and is not renewable. The Agent shall impose conditions in the Authorization Notice necessary to assure protection of public health. If the system fails during the temporary placement and additional replacement area is no longer available, the mobile home shall be removed from the property. (10) An Authorization Notice denied by the Agent shall be reviewed at the request of the applicant. The application for review shall be submitted to the Department in writing within thirty (30) days of the authorization notice denial, and be accompanied by the denial review fee. The denial review shall be conducted and a report prepared by the Department. SSRULE.1 (9-16-86) 71-43 On—Site Sewage Disposal 0167 x.900 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-210 ALTERATION OF EXISTING ON-SITE SEWAGE DISPOSAL SYSTEMS. (1) Permit Required: (a) No person shall alter, or increase the design capacity of, an existing on-site sewage disposal system without first obtaining an Alteration Permit or Construction -Installation Permit, as appropriate. Refer to rule 340-71-160. (b) No person shall increase the projected daily sewage flow into an existing on-site sewage disposal system by more than three hundred (300) gallons beyond the design capacity or increase by more than fifty (50) percent of the design capacity of the system, whichever is less, until a Construction -Installation Permit is obtained. Refer to rule 340-71-160. (2) An application for an Alteration Permit shall be submitted to the Agent for proposed alterations to an existing system that do not increase the existing system's design capacity, or do not exceed the existing system's design capacity by more than three hundred (300) gallons per day or fifty (50) percent, whichever is less. The permit may be issued if: (a) The existing system is not failing; and (b) The setbacks in Table 1 can be met; and (c) In the opinion of the Agent, use of the on-site system would not create a public health hazard or water pollution. (3) An application for a Construction -Installation Permit shall be submitted to the Agent when the existing system's design capacity is proposed to be exceeded by greater than three hundred (300) gallons per day or greater than fifty (50) percent, whichever is less. The permit may be issued if: (a) The existing system is not failing; and (b) A favorable site evaluation report has been obtained from the Agent (refer to rule 340-71-150); and (c) The proposed installation will be in full compliance with these rules. (4) Certificate of.Satisfactory Completion Required. Upon completion of installation of that part of a system for which an Alteration Permit or Construction -Installation Permit has been issued, the permittee shall obtain a Certificate of Satisfactory Completion from the Agent pursuant to rule 340-71-175. An increase in the SSRULE.1 (9-16-86) 71-44 Oir-Site Sewage Disposal 0107 I�'01 DEPARTMENT OF ENVIRONMENTAL QUALITY water Quality Program projected daily sewage flow into the system shall be prohibited until the Certificate is issued. SSRULE.1 (9-16-86) 71-45 Oa—Site Sewage Disposal 0107 1902, DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-215 REPAIR OF EXISTING SYSTEMS. (1) For the purpose of these rules, "Emergency Repair" means the repair of a system where sewage is backing up into a dwelling or commercial facility, or there is a broken pressure sewer pipe and immediate action is necessary to correct the situation. (2) A failing system shall be immediately repaired. EXCEPTION: If in the opinion of the Agent adverse soil conditions exist due to climatic conditions that would likely preclude a successful repair, the Agent may allow a delay in commencing repairs until the soil conditions improve. If this exception is exercised, a compliance date shall be specified in a Notice of Violation to the system owner. (3) No person shall repair a failing system without first obtaining a Repair Permit. See OAR 340-71-160. EXCEPTION: Emergency repairs may be made without first obtaining a permit provided that a repair permit application is submitted to the Agent within three (3) working days after the emergency repairs are begun. (4) Certificate of Satisfactory Completion. Upon completion of installation of that part of a system for which a repair permit has been issued, the permittee shall obtain a Certificate of Satisfactory Completion from the Agent pursuant to Rule 340-71-175. (5) Criteria for Permit Issuance: (a) If the site characteristics and standards described in Rule 340-71-220 can be met, then the repair installation shall conform with them. (b) If the site characteristics or standards described in Rule 340-71-220 cannot be met, the Agent may allow a reasonable repair installation in order to eliminate a public health hazard. Reasonable repairs may require the installation of an alternative system in order to eliminate a public health hazard. (6) Failing systems which cannot be repaired shall be abandoned in accordance with Rule 340-71-185. SSRULE.1 (9-16-86) 71-46 On -Site Sewage Disposal DEPARTMENT 340-71-220 STANDARD SUBSURFACE SYSTE S. (1) For they purpose of these rules: Water litAioZ.1903 (a) "Standard Subsurface System" means an on—site sewage disposal system consisting of a septic tank, distribution unit and gravity—fed absorption facility constructed in accordance with section (2) of this rule, using six (6) inches of filter material below the distribution pipe, and maintaining not less than eight (8) feet of undisturbed earth between disposal -trenches. (b) "Effective Soil Depth" means the depth of soil material above a layer that impedes movement of water, air, or growth of plant roots. Layers that differ from overlying soil material enough to limit effective soil depths are hardpans, claypans, fragipans, compacted soil, bedrock, saprolite and clayey soil. (c) "Large System" means any on—site system with a daily sewage flow greater than two thousand five hundred (2,500) gallons. (d) "Conditions Associated with Saturation" means: (A) Reddish brown or brown soil horizons with gray (chromas of two (2) or less) and red or yellowish red mottles; or (B) Gray soil horizons, or gray soil horizons with red, yellowish red or brown mottles; or (C) Dark colored highly organic soil horizons; or (D) Soil profiles with concentrations of soluable salts at or near the ground surface. (2) Criteria For Standard Subsurface System Approval. In order to be approved for a standard subsurface system each site must meet all the following conditions: (a) Effective soil depth shall extend thirty (30) inches or more from the ground surface as shown in Table 3. A minimum six (6) inch separation shall be maintained between the layer that limits effective soil depth and the bottom of the absorption facility. (b) Water table levels shall be predicted using "conditions associated with saturation." If conditions associated with saturation do not occur in soil with rapid or very rapid permeability, predictions of the highest level of the water SSRULE.1 (9-16-86) 71-47 On—Site Sewage Disposal 0107 1904 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program table shall be baseu on past recorded observations of the Agent. If such nbservations have not been made, or are inconclusive, the application shall be denied until observations can be made. Groundwater leve determinations shall be made during the period of the year in which high groundwater normally occurs in that area. (A) A permanent water table shall be four (4) feet or more from the bottom of the absorption facility. EXCEPTION: In defined geographic areas where the Department has determined through a groundwater study that degradation of groundwater would not be caused nor public health hazards created. In the event this exception is allowed, the rule pertaining to a temporary water table shall apply. (B) A temporary water table shall be twenty-four (24) inches or more below the ground surface. An absorption facility shall not be installed deeper than the level of the temporary water table. (C) Groundwater Interceptors. (Diagram 13) A groundwater interceptor may be used to intercept and/or drain temporary water from a disposal area; however, it may be required to demonstrate that the site can be de - watered prior to issuing a Construction -Installation permit. Groundwater interceptors may be used only on sites with adequate slope to permit proper drainage. Each outlet shall be protected by a short section of Schedule 40 PVC or ABS plastic pipe and a grill to exclude rodents. Where required, groundwater interceptors are an integral part of the system, but do not need to meet setback requirements to property lines, streams, lakes, ponds or other surface water bodies. (c) Soil with rapid or very rapid permeability shall be thirty six (36) inches or more below the ground surface. A minimum eighteen (18) inch separation shall be maintained between soil with rapid or very rapid permeability and the bottom of disposal trenches. EXCEPTION: Sites may be approved with no separation between the bottom of disposal trenches and soil as defined in OAR 340-71-100(114)(a) and (b), with rapid or very rapid permeability, and disposal trenches may be placed into soil as defined in OAR 340-71-100(114)(a) and (b), with SSRULE.1 (9-16-86) 71-48 On -Site Sewage Disposal 0107 1905 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program rapid or very rapid permeability if any of the following conditions occur: -a- A confining layer occurs between the bottom of disposal trenches and the groundwater table. A minimum six (6) inch separation shall be maintained between the bottom of disposal trenches and the top of the confining layer; or -b- A layer of non -gravelly (less than 15% gravel) soil with sandy loam texture or finer at least eighteen (18) inches thick occurs between the bottom of the disposal trenches and the groundwater table; or -c- The projected daily sewage flow does not exceed a loading rate of four hundred fifty (450) gallons per acre per day. (d) Slopes shall not exceed thirty (30) percent and the slope/depth relationship set forth in Table 3. (e) The site has not been filled or the soil has not been modified in a way that would, in the opinion of the Agent, adversely affect functioning of the system. (f) The site shall not be on an unstable land form, where operation of the system may be adversely affected. (g) The site of the initial and replacement absorption facility shall not be covered by asphalt or concrete, or on to vehicular traffic, livestock, or other activity which would adversely affect the soil. (h) The site of the initial and replacement absorption facility will not be subjected to excessive saturation due to, but not limited to, artificial drainage of ground surfaces, driveways, roads, and roof drains. (i) Setbacks in Table 1 can be met. (A) Stream Setbacks. Setback from streams shall be measured from bank drop-off or mean yearly highwater mark, whichever provides the greatest separation distance. (B) Lots Created Prior to May 1, 1973. For lots or parcels legally created prior to May 1, 1973, the Agent may approve installation of a standard or alternative SS&ULE.1 (9-16-86) 71-49 Oa -Site Sewage Disposal ®167 1906 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program system with a setback from surface public waters of less than one hundred (100) feet but not less than fifty (50) feet, provided all other provisions of these rules can be met. (C) Water Lines and Sewer Lines Cross. Where water lines and building or effluent sewer lines cross, separation distances shall be as required in the State Plumbing Code. (D) Septic Tank Setbacks. The Agent shall encourage the placement of septic tanks and other treatment units as close as feasible to the minimum separation from the building foundation in order to minimize clogging of the building sewer. (3) Criteria For System Sizing: Disposal Fields. Disposal fields shall be designed and sized on the basis of: (a) Table 2 -Quantities of Sewage Flows; or other information determined by the Agent to be reliable. EXCEPTIONS: Systems shall be sized on the basis of three hundred (300) gallons sewage flow per day, plus seventy five (75) gallons per day for the third bedroom when: -a- Systems to serve single family dwellings on lots of record prior to March 1, 1978, which are inadequate in size to accommodate a system sized for a daily sewage flow of four hundred fifty (450) gallons. -b- Systems for specifically planned developments, with living units of three (3) or fewer bedrooms, where deed restrictions prohibit an increase in the number of bedrooms. (b) Table 4, Minimum Length of Disposal Trench Required, Soil Texture Versus Effective Soil Depth. (c) Table 5, Minimum Length of Disposal Trench Required, Soil Texture Versus Depth to Temporary Water. (d) Strength of the Wastewater. The minimum length of disposal trench shall be determined by using the following equation: SSRULE.1 (9-16-86) 71-50 On -Site Sewage Disposal 0107 1007 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program Length = (P) x (Q) x (R), where: P = Trench length from Tables 4 or 5, whichever is larger. Q = Design peak daily sewage flow divided by 150. R = BOD5 of Wastewater divided by 200 mg/L, or TSS of Wastewater divided by 150 mg/L, whichever has the higher value. In no case, however, may the value of R be less than 1. For a single family dwelling, assume a value of 200 mg/L BOD5 and 150 mg/L TSS. (4) Septic Tanks: (a) For the purpose of these rules, "Septic Tank" means a watertight receptacle which receives sewage from a sanitary drainage system, is designed to separate solids from liquids, digest organic matter during a period of detention, and allow the liquids to discharge to a second treatment unit or to a soil absorption facility. (b) Liquid Capacity. (A) For projected daily sewage flows up to fifteen hundred (1,500) gallons the septic tank shall have a liquid capacity equal to at least one and one-half (1-1/2) days sewage flow, or one thousand (1,000) gallons, whichever is greater. (B) For projected daily sewage flows greater than fifteen hundred (1,500) gallons, the septic tank shall have a liquid capacity equal to eleven hundred twenty-five (1,125) gallons plus seventy-five (75) percent of the projected daily sewage flow. (C) Additional volume may be required by the Agent for industrial or other special wastes. (D) The quantity of daily sewage flow shall be estimated from Table 2. For structures not listed in Table 2, the Agent shall determine the projected daily sewage flow. (E) Single Family Dwelling. Septic tanks to serve single family dwellings shall be sized on the number of bedrooms in the dwelling, as follows: (i) 1 to 4 bedrooms ........... 1,000 gallons i SSRULE.1 (9-16-86) 71-51 Oa --Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (ii) 5 bedrooms ................ 1,250 gallons (iii) More than 5 bedrooms ....... 1,500 gallons (c) Installation Requirements: (A) Septic tanks shall be installed on a level, stable base that will not settle. (B) Septic tanks located in high groundwater areas shall be weighted or provided with an antibuoyancy device to prevent flotation. (C) All septic tanks installed with the manhole access deeper than eighteen (18) inches, or when used within a sand filter system, commercial system, or pressurized system shall be provided with a watertight manhole riser extending to the ground surface or above. The riser shall have a minimum inside dimension equal to or greater than that of the tank manhole. A cover shall be provided and securely fastened or weighted to prevent easy removal. (D) Septic tanks shall be installed in a location that provides access for servicing and pumping. (E) Where practicable, the sewage flow from any establishment shall be consolidated into one septic tank. (F) At the discretion of the Agent, a removable plug may be placed in the top of the septic tank's inlet sanitary tee if the septic tank discharges directly into a gravity -fed absorption facility. (d) Construction. Septic tank construction shall comply with minimum standards set forth in Rules 340-73-025 and 340-73-030, unless otherwise authorized in writing by the Department. (5) Distribution Techniques. Disposal trenches shall be constructed according to one of the following methods: (a) :Gravity Fed Equal Distribution (including Loop) System. (Diagrams 3, 4 and 5) The equal distribution system shall be used on generally level ground. All trenches and piping shall be level within a tolerance of plus or minus one (1) inch. All lateral piping shall be at the same elevation. SSRULE.1 (9-16-86) 71-52 Oir-Site Sewage Disposal 0107 1909 DEPARTMENT OF ENVIRONKENTAL QUALITY Water Quality Program (b) Serial Distribution System. (Diagrams 1 and 2) The serial distribution system is generally used on sloping ground. Each trench shall be level within a tolerance of plus or minus one (1) inch. (c) Pressurized Distribution Systems. See Rule 340-71-275. for pressurized distribution requirements. (6) Distribution Boxes and Drop Boxes: (a) Construction. Construction of distribution boxes and drop boxes shall comply with minimum standards in rules 340-73-035 through 340-73-045. (b) Foundation. All distribution boxes and drop boxes shall be bedded on a stable, level base. (7) Dosing Tanks: (a) Construction of dosing tanks shall comply with the minimum standards in Rule 340-73-050, unless otherwise authorized in writing by the Department on a case-by-case basis. (b) Each dosing tank shall be installed on a stable level base. (c) Each dosing tank shall be provided with a watertight riser and manhole cover, extending to the ground surface or above. Provision shall be made for securely fastening the manhole cover. (d) At the discretion of the Agent, a removable plug may be placed in the top of the septic tank's inlet sanitary tee, and a trench ten (10) feet long and otherwise constructed the same as a standard disposal trench may be used to provide air and gas exchange from the dosing tank, providing: (A) Ground and surface water will not infiltrate through the gravel -filled trench into the dosing tank; and (B) The invert elevation of the perforated pipe in the ten (10) foot trench is one (1) foot higher than the invert elevation of -the septic tank's inlet sanitary tee; and (C) The design flow for the system does not exceed six hundred (600) gallons per day. SSRULE.1 (9-16-86) 71-53 On -Site Sewage Disposal 0107 1010 DEPARTMENT OF ENVIRONiMENTAL QUALITY Water Quality Program (e) Dosing tanks located in high groundwater areas shall be weighted or provided with an antibuoyancy device to prevent flotation. (8) Disposal Trenches. (Diagrams 1, 2, 3, 4, 5, 11, and 12) (a) Disposal trenches shall be constructed in accordance with the standards contained in the following table, unless otherwise allowed or required within a specific rule of this division: (A) Maximum length of trench ................. 125 feet (B) Minimum bottom width of trench ........... 24 inches (C) Minimum depth of trench, using: (i) Equal or loop distribution ........ 18 inches (ii) Serial distribution ................ 24 inches (iii) Pressure Distribution ............. 18 inches (D) Maximum depth of trench .................. 36 inches (E) Minimum distance of undisturbed earth between disposal trenches ................ 8 feet (b)The bottom of the disposal trench shall be level within a tolerance of plus or minus one (1) inch. (c) When the sidewall within the disposal trench has been smeared or compacted, sidewalls shall be raked to insure permeability. (d) Trenches shall not be constructed in a manner that would allow septic tank effluent to flow backwards from the distribution pipe to undermine the distribution box, the septic tank, or any portion of the distribution unit. (e) Filter material shall extend the full width and length of the disposal trench to a depth of not less than twelve (12) inches. There shall be at least six (6) inches of filter material under the distribution pipe and at least two (2) inches over the distribution pipe. (f) Prior to backfilling the trench, the filter material shall be covered with filter fabric, untreated building paper, or other material approved by the Agent. (g) Where trenches are installed in loamy sand or coarser soils, filter fabric or other non -degradable material approved by SSRULE.1 (9-16-86) I1-54 Osr-Site Sewage Disposal 0107 1911 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program the Agent shall be used to line the trench sidewall and cover the filter material. (9) Trench Backfill: (a) The installer shall assume responsibility for backfilling the system. Backfill shall be carefully placed to prevent damage to the system. (b) A minimum of six (6) inches of backfill is required, except in serial systems where twelve (12) inches is required. (c) Backfill shall be free of large stones, frozen clumps of earth, masonry, stumps, or waste construction materials, or other materials that could damage the system. (10) Header Pipe. (Rule 340-73-060) Header pipe shall be watertight, have a minimum diameter of four (4) inches, and be bedded on undisturbed earth. Where distribution boxes or drop boxes are used, header pipe shall be at least four (4) feet in length. (11) Distribution Pipe (Rule 340-73-060): (a) Distribution pipes shall have a minimum diameter of four (4) inches. (b) Each disposal trench shall have distribution piping that is centered in the trench and laid level within a tolerance of plus or minus one (1) inch. (c) Distribution piping, which complies with standards in Rule 340-73-060, may consist of perforated bituminized fiber, perforated plastic, clay tile or concrete tile. (d) All perforated pipe shall be installed with centerline markings up. (e) Concrete tile and clay tile shall be laid with grade boards and with one-quarter (1/4) inch open joints. The top one- half (1/2) of the joints shall be covered with strips of treated building paper, tar paper, tile connectors, spacers, collars or clips, or other materials approved by the Agent. (12) Effluent Sewer. (Rule 340-73-060) The effluent sewer shall extend at least five (5) feet beyond the septic tank before connecting to the distribution unit. It shall be installed with a minimum fall of four (4) inches per one hundred (100) feet, but in no instance shall there be less than two (2) inches of fall from one end of the pipe to the other. SSRULE.1 (9-16-86) 71-55 On -Site Sewage Disposal nIRPARTMFW nF ENVIRONMENTAL Wa 0.107 1.912. (13) Large Systems. Systems with a projected daily sewage flow ` greater than two thousand five hundred (2,500) gallons shall be designed in accordance with requirements set forth in Rule 340-71-520. SSRULE.1 (9-16-86) 71-56 On—Site Sewage Disposal 0107 1913 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-260 ALTERNATIVE SYSTEMS, GENERAL. (1) For the purpose of these rules "Alternative System" means any Commission approved on --site sewage disposal system used in lieu of the standard subsurface system. (2) "Sewage Stabilization Ponds" and "Land Irrigation of Sewage" are alternative systems available through the Water Pollution Control Facilities (WPCF) permit program. (3) Unless otherwise noted, all rules pertaining to the siting, construction, and maintenance of standard subsurface systems shall apply to alternative systems. (4) General Requirements: (a) Periodic Inspection of Installed Systems. Where required by rule of the Commission, periodic inspections of installed alternative systems shall be performed by the Agent. An inspection fee may be charged. (b) A report of each inspection shall be prepared by the Agent. The report shall list system deficiencies and correction requirements and timetables for correction. A copy of the report shall be provided promptly to the system owner. Necessary follow—up inspections shall be scheduled. SSRULE.1 (9-16-86) 71-57 Ow -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program im 340-71-265 CAPPING FILLS. (Diagrm 10) 0107 1914 (1) For the purposes of this rule, "Capping Fill" means a system where the disposal trench effective sidewall is installed a minimum of twelve (12) inches into natural soil below a soil cap of specified depth and texture. (2) Criteria for Approval. In order to be approved for a capping fill system, each site must meet all the following conditions: (a) Slope does not exceed twelve (12) percent. (b) Temporary water table is not closer than eighteen (18) inches to the ground surface at anytime during the year. A six (6) inch minimum separation must be maintained between the bottom of the disposal trench and the temporary water table. (c) Where a permanent water table is present, a minimum four (4) feet separation shall be maintained between the bottom of the disposal trench and the water table. (d) Where material with rapid or very rapid permeability is present, a minimum eighteen (18) inches separation shall be maintained between the bottom of the disposal trench and soil with rapid or very rapid permeability. (e) Effective soil depth is eighteen (18) inches or more below the natural soil surface. (f) Soil texture from the ground surface to the layer that limits effective soil depth is no finer than silty clay 1 oam . (g) A minimum six (6) inch separation shall be maintained between the bottom of the disposal trench and the layer that limits effective soil depth. (h) The system can be sized according to effective soil depth in Table 4. (3) Installation Requirements. The cap shall be constructed pursuant to permit requirements. Unless otherwise required by the Agent, construction sequence shall be as follows: (a) The soil shall be examined and approved by the Agent prior to placement. The texture of the soil used for the cap shall be of the same textural class, or of one textural class finer, as the natural topsoil. SSRULE.1 (9-16-86) .71-58 On --Site Sewage Disposal 9107 1915. DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (b) Construction of capping fills shall occur between June 1 and October 1 unless otherwise allowed by the Agent. The upper eighteen (18) inches of natural soil must not be saturated or at a moisture content which causes loss of soil structure and porosity when worked. (c) The disposal area and the borrow site shall be scarified to destroy the vegetative mat. (d) The system shall be installed as specified in the construction permit. There shall be a minimum ten (10) feet of separation between the edge of the fill and the absorption facility. (e) Fill shall be applied to the fill site and worked in so that the two (2) contact layers (native soil and fill) are mixed. Fill material shall be evenly graded to a final depth of sixteen (16) inches over the gravel. Both initial cap and repair cap may be constructed at the same time. (f) The site shall be landscaped according to permit conditions and be protected from livestock, automotive traffic or other activity that could damage the system. (4) Required Inspections. The following minimum inspections shall be performed for each capping fill installed: (a) Both the disposal area and borrow material must be inspected for scarification, soil texture, and moisture content, prior to cap construction. (b) Pre—cover inspection of the installed absorption facility. (c) After cap is placed, to determine that there is good contact between fill material and native soil (no obvious contact zone visible), adequate depth of material, and uniform distribution of fill material. (d) Final inspection, after Landscaping. A Certificate of Satisfactory Completion may be issued at this point. SSRULE.1 (9-16-86) 71-59 Oir Site Sewage Disposal 0107 1916 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340=71-270 EVAPOTRANSPIRATION -ABSORPTION (ETA) SYSTEMS. (Diagram 6 & 7) (1) For the purpose of these rules "Evapotranspiration -Absorption System" means an alternative system consisting of a septic tank or other treatment facility, effluent sewer and a disposal bed or disposal trenches, designed to distribute effluent for evaporation, transpiration by plants, and by absorption into the underlying soil. (2) Criteria for Approval. Installation permits may be issued for evapotranspiration -absorption (ETA) systems on sites that meet all of the following conditions: (a) Mean annual precipitation does not exceed twenty-five (25) inches. (b) There exists a minimum of thirty (30) inches of moderately - well to well drained soil. The subsoil at a depth of twelve (12) inches and below shall be fine textured. (c) Slope does not exceed fifteen (15) percent. Exposure may be taken into consideration. (3) Criteria for System Design. ETA beds shall be designed under the following criteria: - (a) Beds shall be sized using a minimum eight hundred fifty (850) square feet of bottom surface area per one hundred fifty (150) gallons of projected daily sewage flow in areas where annual precipitation is fifteen (15) to twenty-five (25) inches, or six hundred (600) square feet of bottom surface area per one hundred fifty (150) gallons of projected daily sewage flow in areas where annual precipitation is less than fifteen (15) inches. (b) Beds shall be installed not less than twelve (12) inches nor deeper than twenty-four (24) inches into natural fine textured soil on the downhill side and not more than thirty- six (36) inches deep on the uphill side. (c) A minimum of one (1) distribution pipe shall be placed in each bed. (d) The surface shall to be seeded according to permit conditions. (e) Other bed construction standards contained in Diagrams 6 and 7 shall apply. SSRIILE.1 (9-16-86) 71-60 Oa --Site Sewage Disposal 0107 1917 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-275 PRESSURIZED DISTRIBUTION SYSTEMS. (1) Pressurized distribution systems may be permitted on any site meeting requirements for: installation of standard subsurface sewage disposal systems, or other sites where this method of effluent distribution is desired. (2) Except as provided in OAR 340-71-220(2)(c), pressurized distribution systems shall be used where depth to soil as defined in OAR 340-71-100(114) (a) and (b) is less than thirty-six (36) inches and the minimum separation distance between the bottom of the disposal trench and soil as defined in OAR 340-71-100(114) (a) and (b) is less than eighteen (18) inches. (3) Pressurized distribution systems installed in soil as defined in OAR 340-71-100(114)(a) and (b) in areas with permanent water tables shall not discharge more than four hundred fifty (450) gallons of effluent per one-half (1/2) acre per day except where: (a) A split waste system is proposed to serve a single family dwelling on ' -a lot of record existing prior to January 1, 1974, which has sufficient area to accommodate a gray water pressurized distribution split waste system; or (b) Groundwater is degraded and designated as a nondevelopable resource by the State Department of Water Resources; or (c) A detailed hydrogeological study discloses loading rates exceeding four hundred fifty (450) gallons per one-half (1/2) acre per day would not increase the nitrate -nitrogen concentration in the groundwater beneath the site, or at any down gradient location, above five (5) milligrams per liter. (4) Materials and Construction: (a) General: (A) All materials used in pressurized systems shall be structurally sound, durable, and capable of withstanding normal stresses incidental to installation and operation. (B) Nothing in these rules shall be construed to set aside applicable building, electrical, or other codes. An electrical permit and inspection from the Department of Commerce or the municipality with jurisdiction (as defined in ORS 456.750(5)) is required for pump wiring installation. SSRULE.2 (9-16-86) 71-61 On -Site Sewage Disposal 0107 1918 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (b) Pressurized Distribution Piping. Piping, valves and fittings for pressurized systems shall meet the following minimum requirements: (A) All pressure transport, manifold, lateral piping, and fittings shall meet or exceed the requirements for Class 160 PVC 1120 pressure pipe as identified in ASTM Specification D2241. (B) Pressure transport piping shall be uniformly supported along the trench bottom, and at the discretion of the Agent, it shall be bedded in sand or other material approved by the Agent. A fourteen (14) gauge tracer wire shall be placed above piping when crossing property lines or entering public property or right of way. (C) Orifices shall be located on top of the pipe, except in areas of extended frozen soil conditions in which case the Agent may specify orifice orientation. (D) The ends of lateral piping shall be provided with threaded plugs or caps. (E) All joints in the manifold, lateral piping, and fittings shall be solvent welded, using the appropriate joint compound for the pipe material. Pressure transport piping may be solvent welded or rubber ring jointed. (F) A gate valve shall be placed on the pressure transport pipe, in or near the dosing tank, when appropriate. (G) A check valve shall be placed between the pump and the gate valve, when appropriate. (c) Disposal Trench Sizing and Construction: (A) A system using disposal trenches shall be designed and sized in accordance with the requirements of OAR 340-71-220(3). (B) Disposal trenches shall be constructed using the speci- fications for the standard disposal trench unless other- wise allowed by the Department on a case-by-case basis. (C) Pressure lateral piping shall have not less than six (6) inches of filter material below, nor less than four (4) inches of filter material above the piping. (D) The sides of the trench and top of the filter material shall be lined or covered with filter fabric, or other, SSRDLE.2 (9-16-86) 71-62 On -Site Sewage Disposal 0107 1919 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 1' nondegradable material permeable to fluids that will not allow passage of soil particles coarser than very fine sand. In soils finer textured than loamy sand, lining the sidewall may not be required. (d) Seepage Bed Construction: (A) Seepage beds may only be used in soil as defined in OAR 340-71-100(114)(a) and (b) as an alternative to the use of disposal trenches. (B) The effective seepage area shall be based on the bottom area of the seepage bed. The minimum area shall be determined as follows: Seepage Bed Area = R x F x S Where: R = BOD5 of Wastewater divided by 200 mg/L, or TSS of Wastewater divided by 150 mg/L, whichever has the higher value. In no case, however, may the value of R be less than 1. F = Design Peak Daily Sewage Flow in gallons divided by 150 gallons. S = Size factor. Seepage beds shall use a factor of 200 square feet. (C) Beds shall be installed not less than eighteen (18) inches (twelve (12) inches with a capping fill) nor deeper than thirty-six (36) inches into the natural soil. The seepage bed bottom shall be level. (D) The top of the filter material shall be lined or covered with filter fabric, or other nondegradable material that is permeable to fluids but will not allow passage of soil particles coarser than very fine sand. (E) Pressurized distribution piping shall have not less than six (6) inches of filter material below, nor less than four (4) inches of filter material above the piping. (F) Pressurized distribution piping shall be horizontally spaced not more than four (4) feet apart, and not more than two (2) feet away from the seepage bed sidewall. At least two (2) parallel pressurized distribution pipes shall be placed in the seepage bed. SSRULE.2 (9-16-86) 71-63 on -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (G) A minimum of ten (10) feet of undisturbed earth shall be maintained between seepage beds. (e) Notwithstanding other requirements of this rule, when the projected daily sewage flow is greater than two thousand five hundred (2500) gallons the Department may approve other design criteria and standards it deems appropriate. (5) Hydraulic Design Criteria. Pressurized distribution systems shall be designed for appropriate head and capacity: (a) Head calculations shall include maximum static lift, pipe friction and orifice head requirements: (A) Static lift where pumps are used shall be measured from the minimum dosing tank level to the level of the perforated distribution piping. (B) Pipe friction shall be based upon a Hazen Williams coefficient of smoothness of 150. All pressure lateral piping and fittings shall have a minimum diameter of two (2) inches unless submitted plans and specifica- tions show a smaller diameter pipe is adequate. The head loss across a lateral with multiple evenly spaced orifices may be considered equal to one-third (1/3) of the head loss that would result if the entrance flow were to pass through the length of the lateral. (C) There shall be a minimum head of five (5) feet at the remotest orifice and no more than a fifteen (15) percent head variation between nearest and remotest orifice in an individual unit. (b) The capacity of a pressurized distribution system refers to the rate of flow given in gallons per minute (gpm): (A) Lateral piping shall have discharge orifices drilled a minimum diameter of one-eighth (1/8) inch, and evenly spaced at a distance not greater than twenty-four (24) inches in coarse textured soils or greater than four (4) feet in finer textured soils. (B) The system shall be dosed at a rate not to exceed twenty (20) percent of the projected daily sewage flow. (C) The affect of back drainage of the total volume of effluent within the pressure distribution system shall be evaluated for its impact upon the dosing tank and system operation. SSRIILE.2 (9-16-86) 71-64 On -Site Sewage Disposal 0107 1921; DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-280 SEEPAGE TRENCH SYSTEM. (1) For the purpose of these rules "Seepage Trench System" means a system with disposal trenches with more than six (6) inches of filter material below the distribution pipe. (2) Criteria for Approval. Contruction permits may be issued by the Agent for seepage trench systems on lots created prior to January 1, 1974, for sites that meet all the following conditions: (a) Groundwater degradation would not result. (b) Lot or parcel is inadequate in size to accommodate standard subsurface system disposal trenches with a projected flow of four hundred fifty (450) gallons per day. (c) All other requirements for standard subsurface systems can be met. (3) Design Criteria: (a) The seepage trench may have a maximum depth of forty-two (42) inches; (b) The seepage trench system shall be sized according to the following formula: Length of seepage trench = (4) x (length of standard disposal trench) divided by (3 + 2D). where D = depth of filter material below distribution pipe in feet. Maximum depth of filter material (D) shall be two (2) feet. (c) The projected daily sewage flow shall be limited to a maximum of four hundred fifty (450) gallons. SSRULE.2 (9-16-86) 71-65 On -Site Sewage Disposal 0107 192 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-285 REDUNDANT SYSTEMS. (Diagraa 11) (1) For the purpose of these rules "Redundant Disposal Field System" means a system in which two (2) complete disposal systems are installed, the disposal trenches of each system alternate with each other and only one system operates at any given time. (2) Criteria for Approval. Construction installation permits may be issued by the Agent for redundant disposal field systems to serve single family dwellings on sites that meet all the following conditions: (a) The lot or parcel was created prior to January 1, 1974, and (b) There is insufficient area to accommodate a standard system. (3) Design Criteria: (a) Each redundant disposal system shall contain two (2) complete disposal fields. (b) Each disposal field shall be adequate in size to accommodate the projected daily sewage flow from the dwelling. (c) A minimum separation of ten (10) feet (twelve (12) feet on centers) shall be maintained between disposal trenches designed to operate simultaneously, and a minimum separation of four (4) feet (six (6) feet on centers) shall be maintained between adjacent disposal trenches. SSRULE.2 (9-16-86) 71-66 Olt -Site Sewage Disposal 9197 1923 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program T 340-71-290 CONVENTIONAL SAND FILTER SYSTEMS. (1) For the purpose of these rules: (a) "Conventional sand filter" means a filter with two (2) feet or more of medium sand designed to filter and biologically treat septic tank or other treatment unit effluent from a pressure distribution system at an application rate not to exceed one and twenty-three hundredths (1.23) gallons per square foot sand surface area per day, applied at a dose not to exceed twenty (20) percent of the projected daily sewage flow. (b) "Medium sand" means a mixture of sand with 100 percent passing the 3/8 inch sieve, 90 percent to 100 percent passing the No. 4 sieve, 62 percent to 100 percent passing the No. 10 sieve, 45 percent to 82 percent passing the No. 16 sieve, 25 percent to 55 percent passing the No. 30 sieve, 5 percent to 20 percent passing the No. 50 sieve, 10 percent or less passing the No. 60 sieve, 4 percent or less passing the No. 100 sieve. (c) "Sand filter system" means the combination of septic tank or other treatment unit, a dosing system with effluent pump and controls, or dosing siphon, piping and fittings, sand filter, and absorption facility used to treat and dispose of sewage. (2) Inspection Requirements. Each sand filter system installed under this rule, and those filters installed under OAP. 340-71-038, may be inspected annually. The Agent may waive the annual evaluation fee during years when sand filter field evaluation work is not performed. (3) Sites Approved for Sand Filter Systems. Sand filters may be permitted on any site meeting requirements for standard subsurface sewage disposal systems contained under OAR 340-71-220, or where standard or pressurized disposal trenches would be used, and all the following minimum site conditions can be met: (a) The highest level attained by temporary water would be: (A) Twelve (12) inches or more below ground surface where gravity equal distribution trenches are used. Pressurized distribution trenches may be used to achieve equal distribution on slopes up to twelve (12) percent; or SSRULE.2 (9-16-86) 71-67 On -Site Sewage Disposal DEPARTMENT NVIRONMENTAL QUALITY Water Quality Yrograt (B) Twelve (12) inches or more below ground surface on sites requiring serial distribution where disposal trenches are covered by a capping fill, provided: trenches are excavated twelve (12) inches into the original soil profile, slopes are twelve (12) percent or less, and the capping fill is constructed according to provisions under OAR 340-71-265(3) and 340-71- 265(4)(a) through (c); or (C) Eighteen (18) inches or more below ground surface on sites requiring serial distribution where standard serial distribution trenches are used.. (b) The highest level attained by a permanent water table would be equal to or more than distances specified as follows: *Minimum Separation Distance from Bottom Soil Groups Effective Seepage Area (A) Gravel, sand, loamy sand, sandy 24 inches loam (B) Loam, silt loam, sandy 18 inches clay loam, clay loam (C) Silty clay loam, silty 12 inches clay, clay, sandy clay *NOTE: Shallow disposal trenches (placed not less than twelve (12) inches into the original soil profile) may be used with a capping fill to achieve separation distances from permanent groundwater. The fill shall be placed in accordance to the provisions of OAR 340-71- 265(3) and 340-71-265(4)(a) through (c) . (c) Permanent water table levels shall be determined in accordance with methods contained in subsection 340-71-220(1)(d). Sand filters installed in soils as defined in OAR 340-71-100(114), in areas with permanent water tables shall not discharge more than four hundred fifty (450) gallons of effluent per one-half (1/2) acre per day except where: (A) A split waste system is proposed to serve a single family dwelling on a lot of record existing prior to January 1, 1974, which has sufficient area to SSRULE.2 (9-16-86) 71-68 On -Site Sewage Disposal 01.07 1925 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program accommodate a gray water sand filter split waste system, or (B) Groundwater is degraded and designated as a non -developable resource by the State Department of Water Resources, or (C) A detailed hydrogeological study discloses loading rates exceeding four hundred fifty (450) gallons per one-half (1/2) acre per day would not increase nitrate - nitrogen concentration in the groundwater beneath the site, or any down gradient location, above five (5) milligrams per liter. (d) Soils, fractured bedrock or saprolite diggable with a backhoe occur such that a standard twenty-four (24) inch deep trench can be installed. (e) Where slope is thirty (30) percent or less. (f) Setbacks in Table 1 can be met, except the minimum separation distance between the sewage disposal area and surface public waters shall be no less than fifty (50) feet. (4) The minimum length of standard disposal trench per one hundred fifty (150) gallons projected daily sewage flow required for a sand filter absorption facility is indicated in the following table: Soil Groups Linear Feet (a) Gravel, sand, loamy sand, sandy loam ........ 35 (b) Loam, silt loam, sandy clay loam, clay loam ................................... 45 (c) Silty clay loam, silty clay, sandy clay, clay ............................ 50 (d) Saprolite or fractured bedrock .............. 50 (e) High shrink -swell clays (Vertisols) ......... 75 NOTE: -a- Disposal trenches in Vertisols shall contain twenty-four (24) inches of filter material and twenty-four (24) inches of -soil backfill. -b- On lots created prior to January 1, 1974, that have insufficient suitable area within which to install an absorption SSRULE.2 (9-16-86) 71-69 Oa -Site Sewage Disposal 01m 1926' DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality_ Program facility sized in accordance with this table, may at the Agent's -discretion utilize seepage trenches, providing: the design criteria and limitations contained in OAR 340-71-280(3) are met; the soil is not a high shrink -swell clay; and all other provisions of this rule are met except that a temporary water table shall be thirty (30) inches or more below the ground surface. (5) Sites with saprolite, fractured bedrock. gravel or soil textures of sand, loamy sand, or sandy loam in a continuous section at least two (2) feet thick in contact with and below the bottom of the sand filter, that meet all other requirements of section 340-71-290(3), may utilize either a conventional sand filter without a bottom or a sand filter in a trench that discharges biologically treated effluent directly into those materials. The application rate shall be based on the design sewage flow in OAR 340-71-295(1) and the basal area of the sand in either type of sand filter. A minimum twenty-four (24) inch separation shall be maintained between a water table and the bottom of the sand filter. (6) Materials and Construction: (a) All materials used in sand filter system construction shall be structurally sound, durable and capable of withstanding normal installation and operation stresses. Component parts subject to malfunction or excessive wear shall be readily accessible for repair and replacement. (b) All filter containers shall be placed over a stable level base. (c) In areas of temporary groundwater at least twelve (12) inches of unsaturated soil shall be maintained between the bottom of the sand filter and top of the disposal trench. (d) Piping and fittings for the sand filter distribution system shall be as required under pressure distribution systems, OAR 340-71-275. (e) The specific requirements for septic tanks, dosing tanks, etc. are found in OAR 340-71-220. (f) The requirements in OAR 340-71-295 shall be met. SSRULE.2 (9-16-86) 71-70 Ott -Site Sewage Disposal 0107 1927 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-295 CONVENTIONAL SAND FILTER DESIGN AND CONSTRUCTION. (Diagrams 8 and 9) (1) Sewage Flows: (a) Design sewage flows for a system proposed to serve a commercial facility shall be limited to six hundred (600) gallons or less, with a wastewater strength not to exceed a BODS of two hundred (200) mg/L and a TSS of one hundred fifty (150) mg/L per day unless otherwise authorized in writing by the Department. (b) Design sewage flows for a system proposed to serve a single family dwelling shall be in accordance with the provisions of OAR '340-71-220(3)(a). (2) Minimum Filter Area. (a) A sand filter proposed to serve a single family dwelling shall have an effective medium sand surface area of not less than three hundred sixty-six (366) square feet. If the design sewage flow exceeds four -hundred fifty (450) gallons per day, the medium sand surface area shall be determined with the following equation: Area = (projected daily sewage flow) divided by (1.23) (b) A sand filter proposed to serve a commercial facility shall be sized on the basis of projected peak daily sewage flow and the strength of the wastewater,. using the following equation: Area = (projected peak daily sewage flow) x (R) divided by (1.23) where R = BODS of Wastewater divided by 200 mg/L, or TSS of Wastewater divided by 150 mg/L, whichever has the higher value. In no case, however, may the value of R be less than one (1). (3) Sand filter container, piping, medium sand, gravel, gravel cover, and soil crown material for a sand filter system discharging to disposal trenches shall meet minimum specifications indicated in Diagrams 8 and 9 unless otherwise authorized in writing by the Department. (4) Container Design .and Construction: (a) A reinforced concrete container consisting of floor and walls as shown in Diagrams 8 and 9 is required where water SSRULE.2 (9-16-86) 71-71 On -Site Sewage Disposal 0107 1.928 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program tightness is necessary to prevent groundwater from infiltrating into the filter.. (b) Container may be constructed of materials other than concrete where equivalent function, workmanship, watertightness and at least a twenty (20) year service life can be documented: (A) Flexible membrane liner (FML) materials must have properties which are at least equivalent to thirty (30) mil unreinforced polyvinyl chloride (PVC) described in OAR 340-73-085. To be approved for filter installa- tion. FML materials must: (i) Have field repair instructions and materials which are provided to the purchaser with the liner; and (ii) Have factory fabricated "boots" suitable for field bonding onto the liner to facilitate the passage of piping through the liner in a waterproof manner. (B) Where accepted for use, flexible sheet membrane liners shall be placed against relatively smooth, regular surfaces. Surfaces shall be free of sharp edges, corners, roots, nails, wire, splinters and other projections which might puncture, tear, or cut the liner. Where a smooth, uniform surface cannot be assured in the field, filter system plans must include specifications for liner protection. A four (4) inch bed of clean sand or a non -degradable filter fabric acceptable to the Agent, shall be used to provide liner protection. SSRULE.2 (9-16-86) 71-72 Otr•Site.Sewage Disposal 010'7 1929 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-300 OTHER SAND FILTER DESIGNS. (1) Other sand filters which vary in design from the conventional sand filter may be authorized by the Department if they can be demonstrated to produce comparable effluent quality. (2) Pre -Application Submittal. Prior to applying for a construction permit for a variation to the conventional sand filter the Department must approve the design. To receive approval the applicant shall submit the following required information to the Department: (a) Effluent quality data. Filter effluent quality samples shall be collected and analyzed by a testing agency acceptable to the Department using procedures identified in the latest edition of "Standard Methods for the Examination of Wastewater," published by the American Public Health Association, Inc. The duration of filter effluent testing shall be sufficient to ensure results are reliable and applicable to anticipated field operating conditions. The length of the evaluation period and number of data points shall be specified in the test report. The following parameters shall be addressed: (A) BODS; (B) TSS; (C) Fecal coliform; (D) Nitrogen (Ammonia, Nitrate and Total Kjeldahl Nitrogen). (b) A description of unique technical features and process advantages. (c) Design criteria, loading rates, etc. (d) Filter media characteristics. (e) A description of operation and maintenance details and requirements. (f)' Any additional information specifically requested by the Department. (3) Construction Procedure. Following pre -application approval, a permit application shall be submitted in the usual manner. Applications shall include applicable drawings, details and written specifications to fully describe proposed construction and allow system construction by contractors. Included must SSRULE.2 (9-16-86) 71-73 Oa --Site Sewage Disposal 0167 1930 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program ` be the specific site details peculiar to that application, including soils data, groundwater type and depth, slope, setbacks, existing structures, wells, roads, streams, etc. Applications shall include a manual for homeowner operation and maintenance of the system. SSRULE.2 (9-16-86) 71-74 Orr - Site Sewage Disposal 0107 1931' DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-305 SAND FILTER SYSTEM OPERATION AND MAINTENANCE - (1) Sand filter operation and maintenance tasks and requirements shall be as specified on the Certificate of Satisfactory Completion. Where a conventional sand filter system or other sand filter system with comparable operation and maintenance requirements is used, the system owner shall be responsible for the continuous operation and maintenance of the system. (2) The owner of any sand filter system shall provide the Agent written verification that the system's septic tank has been pumped at least once each forty-eight (48) months by a licensed sewage disposal service business. Service start date shall be assumed to be the date of issuance of the Certificate of Satisfactory Completion. The owner shall provide the Agent certification of tank pumping within two (2) months of the date required for pumping. (3) No permit shall be issued for the installation of any other sand filter which in the judgment of the Department would require operation and maintenance significantly greater than the conventional sand filter unless arrangements for system operation and maintenance meeting the approval of the Director have been made which will ensure adequate operation and maintenance of the system. Each permitted installation may be inspected by the Agent at least every twelve (12) months and checked for necessary corrective maintenance. The Agent may waive the annual system evaluation fee during years when the field evaluation work is not performed. SSRULE.2 (9-16-86) 71-75 On -Site Sewage Disposal 0107 1932 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-310 STEEP SLOPE SYSTEMS. (1) General conditions for approval. An on --site system construction permit may be issued by the Agent for a steep slope system to serve a single-family dwelling on slopes in excess of thirty (30) percent provided all the following requirements can be met: (a) Slope does not exceed forty-five (45) percent. (b) The soil is well drained with no evidence of saturation. (c) The soil has a minimum effective soil depth of sixty (60) inches. (2) Construction Requirements: (a) Seepage trenches shall be installed at a minimum depth of thirty (30) inches and at a maximum depth of thirty-six (36) inches below the natural soil surface on the downhill side of the trench, and contain a minimum of eighteen (18) inches of filter material and twelve (12) inches of native soil backfill. (b) The system shall be sized at a minimum of seventy-five (75) linear feet per one hundred fifty (150) gallons projected daily sewage flow. SSRULE.2 (9-16-86) 71-76 Oa -Site Sewage Disposal 0197 1.933 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-315 TILE DEWATERING SYSTEM. (1) General conditions for approval. On-site system construction permits may be issued by the Agent for tile dewatering systems. provided the following requirements can be met: (a) The site has a natural outlet that will allow a field tile installed on a proper grade around the proposed absorption facility to daylight above annual high water. (b) Soils must be silty clay loam or coarser textured and be drainable, with a minimum effective soil depth of at least thirty (30) inches in soils with temporary groundwater, and at least seventy-two (72) inches in soils with permanent groundwater. (c) Slope does not exceed three (3) percent. (d) All other requirements for the system, except depth to groundwater, can be met. However, after the field collection drainage tile is installed, the groundwater levels shall conform to the requirements of OAR 340-71-220(2) or 340-71-290(3). (2) Construction Requirements: (a) Field collection drainage tile shall be installed on a uniform grade of two-tenths to four -tenths (0.2-0.4) feet of fall per one hundred (100) feet, and either (A) A minimum of thirty-six (36) inches deep in soils with temporary groundwater, or (B) A minimum of sixty-six (66) inches deep in soils with permanent groundwater. (b) Maximum drainage tile spacing shall be seventy (70) feet center to center. (c) Minimum horizontal separation distance between the drainage tile and absorption facility shall be twenty (20) feet. (d) Field collection drainage tile shall be rigid smooth wall perforated pipe with a minimum diameter of four (4) inches. (e) Field collection drainage tile shall be enveloped in clean filter material to within thirty (30) inches of the soil surface in soils with permanent groundwater, or to within twelve (12) inches of the soil surface in soils with temporary groundwater. Filter material shall be covered SSRULE.2 (9-16-86) 71-77 Ow -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL Water Qua, 0 g194 with filter fabric, treated building paper or other nondegradable material approved by the Agent. (f) Outlet tile shall be rigid smooth wall solid PVC pipe with a minimum diameter of four (4) inches. The outlet end shall be protected by a short section of Schedule 80 PVC or ABS or metal pipe, and a flap gate or grill to exclude rodents. (g) A silt trap with a thirty (30) inch minimum diameter shall be installed between the field collection drainage the and the outlet pipe unless otherwise authorized by the Department. The bottom of the silt trap shall be a minimum twelve (12) inches below the invert of the drainage pipe outlet. (h) The discharge pipe and tile drainage system are integral parts of the system, but do not need to meet setback requirements to property lines. streams, lakes, ponds or other surface water bodies. (i) The Agent has the discretion of requiring demonstration that a proposed tile dewatering site can be drained prior to issuing a Construction—Installation permit. (j) The absorption facility shall use equal or pressurized distribution. SSRULE.2 (9-16-86) 71-78 Oa --Site Sewage Disposal DEP. OF ENV 340-71-320 SPLIT WASTE SYSTEMS. . Water ualit `P rim 193 (1) - For the purpose of these rules: (a) "Split waste system" means a system where "black waste" sewage and "gray water" sewage from the same dwelling or building are disposed of by separate methods. (b) 'Black waste" means human body wastes including feces, urine, other extraneous substances of body origin and toilet paper. (c) "Gray water" means household sewage other than "black wastes", such as bath water, kitchen waste water and laundry wastes. (2) Criteria for Approval. In split waste systems wastes may be disposed of as follows: (a) Black wastes may be disposed of by the use of State Department of Commerce approved nonwater-carried plumbing units such as recirculating oil flush toilets or compost toilets. (b) Gray water may be disposed of by discharge to: (A) An existing on-site system which is not failing; or (B) A new on-site system with a soil absorption facility two-thirds (2/3) normal size. A full size initial disposal area and replacement disposal area of equal size are required; or (C) A public sewerage system. SSRULE.2 (9-16-86) 71-79 On -Site Sewage Disposal 0107 1936. DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-325 GRAY WATER. WASTE DISPOSAL SUMPS. (Diagrams 14 and 15) (1) For the purpose of these rules "gray water waste disposai'sump" means a series of receptacles designed to receive hand -carried gray water for disposal into the soil. (2) Criteria for Approval: (a) Hand -carried gray water may be disposed of in gray water waste disposal sumps which serve facilities such as recreation parks, camp sites, seasonal dwellings, or construction sites where the projected daily gray water flow does not exceed ten (10) gallons per unit. Gray water or other sewage shall not be piped to the gray water waste disposal sump. Where projected daily sewage flow exceeds ten (10) gallons per unit, gray water shall be disposed of in facilities meeting requirements of OAR 340-71-320(2)(b). (b) Gray water sumps may be used only where soil conditions are approved for such use by the Agent. (3) In campgrounds or other public use areas, gray water waste disposal sumps shall be identified as "sink waste disposal" by placard or sign in letters not less than three (3) inches in height and in a color contrasting with the background. SSRULE.2 (9-16-86) 71-80 Oa -Site Sewage Disposal 0107 1937 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program a 340-71-330 NONWATER-CARRIED SYSTEMS. (1) For the purpose of these rules: (a) Nonwater-carried waste disposal facility" means any toilet facility which has no direct water connection, including pit privies, vault privies and portable toilets. (b) "Privy" means a structure used for disposal of human waste without the aid of water. It consists of a shelter built above a pit or vault in the ground into which human waste falls. (c) "Portable toilet" means any self-contained chemical toilet facility that is housed within a portable toilet shelter, and includes but is not limited to construction -type chemical toilets. (2) No person shall cause or allow the installation or use of a ' nonwater-carried waste disposal facility without prior written approval of the Agent. EXCEPTIONS: -a- Temporary use pit privies used on farms for farm labor shall be exempt from approval requirements. -b- Sewage Disposal Service business licensed pursuant to OAR 340-71-600 may install portable toilets without written approval of the Agent, providing all other requirements of this rule are met. (3) Non -water carried waste disposal facilities may be approved for temporary or limited use areas, such as recreation parks, camp sites, seasonal dwellings, farm labor camps, or construction sites, provided all liquid wastes can be handled in a manner to prevent a public health hazard and to protect public waters, provided further that the separation distances in Table 8 can be met. EXCEPTION: The use of portable toilets shall not be allowed for seasonal dwellings. (4) Construction. Nonwater-carried waste disposal facilities shall be constructed in accordance with requirements contained in Rules 340-73-065 through 340-73-075. (5) Maintenance. Nonwater- carried waste disposal facilities shall be maintained to prevent health hazards and pollution of public waters. SSRULE.2 (9-16-86) 71-81 Or -Site Sewage Disposal 010' 103�8. DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (6) General. No water -carried sewage shall be placed in nonwatex-, carried waste disposal facilities. Contents of nonwater-carried waste disposal facilities shall not be discharged into storm sewers, on the surface of the ground or into public waters. (7 ) Pit Privy: (a) Unsealed earth pit type privies may be approved where the highest level attained by groundwater shall not be closer than four (4) feet to the bottom of the privy pit. (b) The privy shall be constructed to prevent surface water from running into the pit. (c) When the pit becomes filled to within sixteen (16) inches of the ground surface, a new pit shall be excavated and the old pit shall be backfilled with at least two (2) feet of earth. (8) No person shall cause or allow the installation or use of a portable toilet unless the pumping or cleaning of the portable toilet is covered by a valid and effective contract with a person licensed pursuant to ORS 454.695. Each portable toilet shall display the business name of the sewage disposal service that is responsible for servicing it. SSRULE.2 (9-16-86) 71-82 Otr-Site Sewage Disposal UIU 7 �(;,Jj DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-335 CESSPOOLS AND SEEPAGE PITS. (Diagrams 16 and 17) (1) For the purpose of these rules: (a) "Cesspool" means a lined pit which receives raw sewage, allows separation of solids and liquids, retains the solids and allows liquids to seep into the surrounding soil through perforations in the lining. (b) "Seepage Pit" means a "cesspool" which has a treatment facility such as a septic tank ahead of it. (2) Except as provided in OAR 340-71-401, construction of new cesspool sewage disposal systems in Oregon is prohibited. (3) Seepage pit sewage disposal systems may be used only to serve existing sewage loads and replace existing failing seepage pit and cesspool systems on lots that are inadequate in size to accommodate a standard system or other alternative on --site sewage systems. A construction -installation permit allowing replacement of the failing system shall not be issued if a sewerage system is both legally and physically available, as described in OAR 340-71-160(5)(f). (4) Construction Requirements: (a) Each seepage pit shall be installed in a location to facilitate future connection to a sewerage system when such facilities become available. (b) Maximum depth of seepage pits shall be thirty-five (35) feet below ground surface. (c) The seepage pit depth shall terminate at least four (4) feet above the water table. (d) Other standards for seepage pit construction are as shown in diagrams 16 and 17. (5) Notwithstanding the permit duration specified in section 340-71-160(9), a permit issued pursuant to this rule may be effective for a period of less than one (1) year from the date of issue if specified by the Agent. SSRULE.2 (9-16-86) 71-83 Ozr-Site Sewage Disposal 0107 1940 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-340 HOLDIM TANKS. (1) For the purpose of these rules "Holding Tank" means a watertight receptacle designed to receive and store sewage to facilitate disposal at another location. (2) Criteria for Approval. Installation permits may be issued by the Agent for holding tanks on sites that meet all the following conditions: (a) Permanent Use: (A) The site is not approvable for installation of a standard subsurface system; and (B) No community or area -wide sewerage system is available or expected to be available within five (5) years; and (C) The tank is intended to serve a small industrial or commercial building, or an occasional use facility such as a county fair or a rodeo; and (D) Unless otherwise allowed by the Department, the projected daily sewage flow is not more than two hundred (200) gallons; and (E) Setbacks as required for septic tanks can be met. (b) Temporary Use: (A) In an area under the control of a city or other legal entity authorized to construct, operate, and maintain a community or area7-wide sewerage system, a holding tank may be installed provided the application for permit includes a copy of a legal commitment from the legal entity that within five (5) years from the date of the application the legal entity will extend to the property covered by the application a community or area -wide sewerage system meeting the requirements of the Commission, and provided further that the proposed holding tank will otherwise comply with the requirements of these rules; or (B) Installation of an approved on-site system has been delayed by weather conditions; or (C) The tank is to serve a temporary construction site. SSRULE.2 (9-16-86) 71-84 On -Site Sewage Disposal 019'7 1941 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (3) Generali (a) No building may be served by more than one (1) holding tank. (b) A single tax lot may be served by no more than one (1) holding tank unless the holding tanks are under control of a municipality as defined in ORS 454.010(3). (4) Design and Construction Requirements: (a) Plans and specifications for each holding tank proposed to be installed shall be submitted to the Agent for review and approval. (b) Each tank shall have a minimum liquid capacity of fifteen hundred (1,500) gallons. (c) Each tank shall: (A) Comply with standards for septic tanks contained in Rules 340-73-025 and 340-73-030. (B) Be located and designed to facilitate removal of contents by pumping. (C) Be equipped with both an audible and visual alarm, placed in a location acceptable to the Agent, to indicate when the tank is seventy-five (75) percent of full. The audible alarm only may be user cancelable. (D) Have no overflow vent at an elevation lower than the overflow level of the lowest fixture served. (E) Be designed for antibuoyancy if test hole examination or other observations inidicate seasonally high groundwater may float the tank when empty. (5) Special Requirements. The application for an installation permit shall contain: (a) A copy of a contract with a licensed sewage disposal service company which shows the tank will be pumped periodically, at regular intervals or as needed, and the contents disposed of in a manner and at a facility approved by the Department. (b) Evidence that the owner or operator of the proposed disposal facility will accept the pumpings for treatment and disposal. SSRULE.2 (9-16-86) 71-85 Oo-Site Sewage Disposal. 010'7 1942, DEPARTMENT OF ENVIROHIMENTAL QUALITY Water Quality Program (c) A record of pumping dates and amounts pumped shall be maintained by both the treatment facility owner and the sewage disposal service, and upon request, made available to the Agent. (6) Inspection Requirements. Each holding tank installed under this rule, and those tanks installed under OAR 340-71-037(3), shall be inspected annually. An alternative system evaluation fee shall be charged for each annual inspection. SSRULE.2 (9-16-86) 71-86 Ott -Site Sewage Disposal 0.07 1943 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-345 AEROBIC SYSTEMS. (1) For the purpose of these rules: (a) "Aerobic Sewage Treatment Facility" means a sewage treatment plant which incorporates a means. of introducing air (oxygen) into the sewage so as to provide aerobic biochemical stabilization during a detention period. (b) "Mechanical Oxidation Sewage Treatment Facility" means an aerobic sewage treatment facility. (2) Criteria for Approval. Aerobic sewage treatment facilities may be approved for a construction -installation permit provided all the following criteria are met: (a) The daily sewage flow to be treated is less than five thousand (5000) gallons. (b) The aerobic sewage treatment facility (plant) is part of an approved on-site sewage disposal system. (c) The plant has been tested pursuant to the current version of the National Sanitation Foundation (NSE) Standard No. 40, relating to Individual Aerobic Wastewater Treatment Plants, and been found to conform with Class I or Class II and other requirements of the standard. In lieu of NSE testing, the Department may accept testing by another agency which it considers to be equivalent. (d) The property owner records in the county land title records, in a form approved by the Department, an easement and a covenant in favor of the State of Oregon. (A) Allowing its officers, agents, employees and representatives to enter and inspect, including by excavation, the aerobic sewage treatment facility; and (B) Acknowledging that proper operation and maintenance of the plant is essential to prevent failure of the entire on-site sewage disposal system; and (C) Agreeing for himself and his heirs, successors and assigns, to hold harmless, indemnify and defend the State of Oregon, its officers, representatives, employees and agents for any and all loss and damage caused by installation or operation of the system; and (D) Agreeing not to put the land to any conflicting use. SSRULE.2 (9-16-86) 71-87 Otr-Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (3) The plant shall: (a) Have a visual and audible alarm, placed at a location acceptable to the Agent, which are activated upon an electrical or mechanical malfunction. (b) Have a minimum rated hydraulic capacity equal to the daily sewage flow or five hundred (500) gallons per day, whichever is greater. (c) Have aeration and settling compartments constructed of durable material not subject to excessive corrosion or decay. (d) Have raw sewage screening or its equivalent. (e) Have provisions to prevent surging of flow through the aeration and settling compartments. (f) Have access to each compartment for inspection and maintenance. (g) Have provisions for convenient removal of solids. (h) Be designed to prevent: (A) Short circuiting of flow. (B) Deposition of sludge in the aeration compartment. (C) Excessive accumulation of scum in the settling compartment. (4) Disposal Field Sizing. Disposal fields serving systems employing aerobic sewage treatment facilities shall be sized according to Tables 4 and 5 of these rules. Where a NSF Class I plant is installed, the linear footage of disposal trench installed may be reduced by twenty (20) percent, provided a full sized standard system replacement area is available. (5) Operation and Maintenance: (a) The supply of parts must by locally available for the expected life of the unit. (b) The supplier of the plant shall be responsible for providing operation training to the owner. SSMME.2 (9-16-86) 71-88 On -Site Savage Disposal DEPARMENT OF ENVIRONKM AL QUALITY water tjual3.ry rro (c) The supplier of the plant shall provide the owner with an operation and maintenance (0 & M) manual for the specific plant installed. (d) The owner shall remove excess solids from the plant at least once per year, or more frequently if recommended by the 0 & M manual. (6) Inspection Requirements. Each aerobic sewage treatment facility installed under this rule shall be inspected by the Agent at least once per year (See OAR 340-71-260(4)(a)). SSRULE.2 (9-16-86) 71-89 On -Site Sewage Disposal W 0107 1946 DEPARMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-350 LOW -FLUSH TOILETS. Permits issued for installation of an on-site system shall allow a reduction of twenty-five (25) percent in the seepage area provided: (1) The single family dwelling or commercial facility utilizes two (2) quarts or less low volume flush toilets approved by the State Department of Commerce; and (2) A full sized initial and replacement drainfield area is available. SSRULE.2 (9-16-86) 71-90 On -Site Sewage Disposal 0107 1947 DEPARTMENT OF ENVIRONMENTAL QUALITY Watei Quality Program 340-71-355 GRAVEL -LESS DISPOSAL TRENCH SYSTMIS. (1) Gravel -less disr^ral trench systems may be permitted on any site providing: (a) The site fully complies with the criteria for installation of a standard subsurface sewage disposal system, as identified in OAR 340-71-220(2) and (b) The site has sandy loam, loamy sand, or sand soil textures; and (c) It serves a single family dwelling. (2) Distribution pipes for gravel -less disposal trench systems shall 'conform to the requirements in OAR 340-73-060(2)(f). (3) Gravel -less disposal trench systems shall be constructed pursuant to the standards identified in OAR 340-71-220. EXCEPTIONS: -a- The bottom trench width shall not be less than eighteen (18) inches wide; and -b- The provisions of OAR 340-71-220(8)(e), (f), and (g) are not applicable. SSRULE.2 (9-16-86) 71-91 Oa -Site Savage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-360 DISPOSAL TRENCHES IN SAPRCLITE. 010 7 1948 (1) General Conditions for Approval. An onsite system constructz.on- installation permit may be issued for a system to serve a single family dwelling on a site with soil shallow to saprolite provided requirements in either subsection (a) or (b) of this section can be met. (a) Slope does not exceed thirty (30) percent: (A) The saprolite is sufficiently weathered so that it can be textured, crushed, or broken with hand pressure to a depth of twenty-four (24) inches and can be dug from a test pit wall with a spade or other hand tool to a depth of forty-eight (48) inches; and (B) Clay films or iron coatings with moist values of five (5) or less and moist chromas of four (4) or more and/or organic coatings with moist values of three (3) or less and moist chromas of two (2) or more occur on fracture surfaces of the saprolite to a depth of forty- eight (48) inches. (b) Slope is in excess of thirty (30) percent but does not exceed forty-five (45) percent: (A) -The saprolite is sufficiently weathered so that it can be textured, crushed, or broken with hand pressure to a depth of twenty-four (24) inches and can be dug from a test pit wall with a spade or other hand tool to a depth of sixty (60) inches; and (B) Clay films or iron coatings with moist values of five (5) or less and moist chromas of four (4) or more and/or organic coatings with moist values of three (3) or less and moist chromas of two (2) or more occur on fracture surfaces of the saprolite to a depth of sixty (60) inches. (2) Construction Requirements. (a) Standard disposal trenches shall be installed where slope does not exceed thirty (30) percent. (A) Standard disposal trenches shall be installed at a minimum depth of twenty-four (24) inches and a maximum depth of thirty (30) inches below the natural soil surface and contain twelve (12) inches of filter material and a minimum of twelve (12) inches of native soil backfill. SSRULE.2 (9-16-86) 71-92 Ow. -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (B) Standard disposal trenches shall be sized at'a minimum of one hundred (100) linear feet per one hundred fifty (150) gallons projected daily sewage flow. (b) Seepage trenches shall be installed where slope is in excess of thirty (30) percent but does not exceed forty-five (45) percent. (A) Seepage trenches shall be installed at a minimum depth of thirty (30) inches and at a maximum depth of thirty- six (36) inches below the natural soil surface and contain a minimum of eighteen (18) inches of filter material and twelve (12) inches of -native soil backfill. (B) Seepage trenches shall be sized at a minimum of seventy-five (75) linear feet per one hundred fifty (150) gallons of projected daily sewage flow. -' SSRULE.2 (9-16-66) 71-93 O= -Site Sewage Disposal 0107 1.950 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-400 GEOGRAPHIC AREA SPECIAL CONSIDERATIONS. (1) River Road -Santa Clara Area, Lane County: (a) Within the areas set forth in subsection (b) of this section the Agent may issue either construction permits for new subsurface sewage disposal systems or favorable reports of evaluation of site suitability to construct systems under the following circumstances: (A) The system complies with all rules in effect at the time the permit is issued; and (B) The system will not in itself contribute, or in combination with other new sources after April 18, 1980, contribute more than sixteen and seven tenths (16.7) pounds nitrate -nitrogen per acre per year to the local groundwater. The applicant shall assure compliance with this condition by showing his ownership or control of adequate land through easements or equivalent. (b) Subsection (a) of this section shall apply to all of the following area generally known as River Road/Santa Clara, and defined by the boundary submitted by the Board of County Commissioners for Lane County, which is bounded on the south by the city of Eugene, on the west by the Southern Pacific Railroad, on the north by Beacon Drive, and on the east by the Willamette River, and containing all or portions of T16S, R4W, sections 33. 34, 35, 36; T17S, R4W, sections 1, 2, 3, 4, 10, 11, 12, 13, 14, 15, 22, 23, 24, 25; and T17S. R1E, sections 6. 7, 18, Willamette Meridian. (c) This rule is subject to modification or repeal by the Commission on an area -by -area basis upon petition by the appropriate local agency or agencies. Such petition either shall provide reasonable evidence that development using subsurface sewage disposal systems will not cause unacceptable degradation of groundwater quality or surface water quality or shall provide equally adequate evidence that degradation of groundwater or surface water quality will not occur as a result of such modification or repeal. (d) Subsections (a) and (b) of this section shall not apply to any construction permit application based on a favorable report of evaluation of site suitability issued by the Agent pursuant to ORS 454.755(1)(b), where such report was issued prior to the effective date of this rule. SSRULE.2 (9-16-86) 71-94 On -Site Sewage Disposal 0107 1951 DEPARTMENT OF ENVIRON[ENTAL QUALITY Water Quality Program (2) General North Florence Aquifer, North Florence Dunal Aquifer Area, Lane County: (a) Within the area set forth in subsection (2)(b) of this rule, the agent may issue construction permits f or new on-site sewage disposal systems or favorable reports of evaluation of site suitability to construct individual or community on- site sewage disposal systems under the following circumstances: (A) The lot and proposed system shall comply with all rules in effect at the time the permit or favorable report of site suitability is issued; or (B) The lot and proposed system complies with paragraph 2(a)(A) of this rule, except for the projected daily sewage loading rates, and the system in combination with all other previously approved systems owned or legally controlled by the applicant shall be projected by the Department to contribute to the local groundwater not more than fifty-eight (58) pounds nitrate -nitrogen NO3-Nper year per acre owned or controlled by the applicant. (b) Subsection (2)(a) of this rule shall apply to all of the following area hereby known as the General North Florence Aquifer of the North Florence Dunal Area and is defined by the hydrologic boundaries identified in the June 1982, 208 North Florence Dunal Aquifer Study, which is the area bounded on the west by the Pacific Ocean; on the southwest and south by the Siuslaw River; on the east by the North Fork of the Siuslaw River and the ridge line at the approximate elevation of four hundred (400) feet above mean sea level directly east of Munsel Lake, Clear Lake and Collard Lake; and on the north by Mercer Lake, Mercer Creek, Sutton Lake and Sutton Creek; and containing all or portions of T17 S, R12W, sections 27, 28, 33, 34, 35, 36, and T18S, T12 W. sections 1, 2, 3, 4, 9, 10, 11, 12. 13, 14, 15, 16, 22. 23, 24, 25. 26, 27; W.M. , . Lane County. except that portion defined as the Clear Lake Watershed more particularly described by OAR 340-71-460(6)(f). (3) Lands Overlaying the Alsea Dunal Aquifer: (a) Within the area set forth in subsection (3) (c) of this rule, the Agent may issue a construction permit for a new on-site sewage disposal system or a favorable report of evaluation of site suitability to construct a single on-site system on lots that were lots of record prior to January 1, 1981; or on lots in partitions or subdivisions that have received SSRULE.2 (9-16-86) 71-95 Oir-Site Sewage Disposal 0107 1952 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program preliminary planning, zoning, and on-site sewage disposal approval prior to January 1, 1981, providing one of the following can be met: (A) At the time the permit or favorable report of site suitability is issued the lot complies with OAR 340-71-100 through OAR 340-71-350 and OAR 340-71-410 through OAR 340-71-520; or (B) The lot is found through site evaluation not to comply with OAR 340-71-100 through OAR 340-71-350 and OAR 340-71-410 through OAR 340-71-520, but does meet all of the following conditions when a pressurized seepage bed is utilized: (i) Groundwater levels shall not be closer than four (4) feet from the ground surface or closer than three (3) feet from the bottom of the seepage bed. (ii) The seepage bed shall be constructed in accordance with OAR 340-71-275(4) and (5). (iii) The seepage bed shall be sized on the basis of two hundred (200) square feet of bottom area per one hundred fifty (150) gallons projected daily sewage flow. (iv) Projected daily sewage flows shall be limited to not more than three hundred seventy-five (375) gallons per lot, except those lots which have a certificate of favorable site evaluation which provides for a larger flow. (v) All setbacks identified in Table 1 can be met, except that lots of record prior to May 1, 1973, shall maintain a minimum fifty (50) feet separation to surface public waters. (vi) Sufficient area exists on the lot to install a seepage bed and a replacement seepage bed. The area reserved for replacement may be waived pursuant to the exception in OAR 340-71-150(4) (a)(B)• (C) The lot is found through site evaluation not to comply with OAR 340-71-100 through OAR 340-71-350 and OAR 340-71-410 through OAR 340-71-520, but does meet all of the following conditions when a conventional sand filter without a bottom is utilized: SSRULE.2 (9-16-86) 71-96 On -Site Sewage Disposal 0107 1.953 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (i) Groundwater levels shat not be closer than one (1) foot from the ground surface and not closer than one (1) foot from the bottom of the sand filter. (ii) Sewage flows shall be limited to not more than three hundred seventy-five (375) gallons per day per lot. except those lots which have a certificate of favorable site evaluation which provides for a larger flow. (iii) The sand filter shall be sized at one (1) square foot of bottom area for each gallon of projected daily sewage flow. (iv) The conventional sand filter without a bottom shall be constructed in accordance with OAR 340-71-295(3). (v) All setbacks identified in Table 1 can be met, except that lots of record prior to May 1, 1973. shall maintain --a minimum fifty (50) feet separation to surface public waters. (vi) Sufficient area exists on the lot to install a bottomless conventional sand filter and a replacement bottomless conventional sand filter. The area for replacement may be be waived pursuant to the exception contained in OAR 340-71-150 (4) (a) (B) . (b) Within the area set forth in subsection (3)(c) of this rule, for lots created on or after January 1, 1981, and/or when the on-site system will serve a commercial facility, the Agent may issue a construction permit for a new on-site sewage disposal system or a favorable report of evaluation of site suitability if it is determined that all rules of the Commission can be met. (c) The Alsea Dunal Aquifer is defined as all the land bounded on the East by Highway 101, the Pacif is Ocean on the West. and from Drift -wood Beach Wayside South to the southern tip of the Alsea Bay Spit. . (d) If the results of groundwater monitoring in the Alsea Dunal Aquifer indicate unacceptable levels of degradation or if it appears necessary or desirable to pursue development of the aquifer as a source of drinking water, sewage collection and off-site treatment and disposal facilities shall be installed unless further study demonstrates that such SSRULE.2 (9-16-86) 71-97 O= -Site Sewage Disposal 0107 1954 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program facilities are not necessary or effective to protect the beneficial use. (4) Christmas Valley Townsite, Lake County: (a) Within the area set forth in subsection (4)(b) of this rule, the agent may consider the shallow groundwater table, if present, in the same manner as a temporary water table when preparing and/or issuing site evaluation reports and construction -installation permits. (b) The Christmas Valley Townsite is defined as all land within the Christmas Valley Townsite plat located within section 9. 10, 11, 14, 15 and 16 of Township 27 South, Range 17 East, Willamette Meridian, in Lake County. (5) Clatsop Plains Aquifer, Clatsop County: The Clatsop Plains Groundwater Protection Plan, prepared by R.W. Beck and Associates and adopted by Clatsop County, provides a basis for continued use of on-site sewage disposal systems w hil e protecting the quality of groundwater for future water supplies. For the plan to be successful, the following components must be accomplished: (a) By not later than January 1, 1983, Clatsop County shall identify and set aside aquifer reserve areas for future water supply development containing a minimum of two and one half (2-1/2) square miles- The reserve areas shall be controlled so that the potential for groundwater contamination from nitrogen and other possible pollutants is kept to a minimum. (b) The Agent may issue construction installation permits for new on-site sewage disposal systems or favorable reports of site evaluation to construct orr site systems, within the area generally known as the Clatsop Plains, which is bounded by the Columbia River to the North; the Pacific Ocean to the west; the Necanicum River, Neawanna Creek, and County Road 157 on the south; and the Carnahan Ditch-Ski.panon River and the foothills of the Coast Range to the east, providing: (A) The lot or parcel was created in compliance with the appropriate comprehensive plan for Gearhart (adopted by County Ordinance 80-3). Seaside (adopted by County Ordinance 80-10). Warrenton (adopted by County Ordinance 82-15), or the Clatsop County plan adopted through Ordinance No. 79-10; and either SSRULE.2 (9-16-86) 71-98 Orr -Site Sewage Disposal 0107 1955 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (B) The lot or parcel does not violate any rule of this Division; or (C) Lot or parcel does' not violate the Department's Water Quality Management Plan or any rule of this Division, except the projected maximum sewage loading rate would exceed the ratio of four hundred fifty (450) gallons per one-half (1/2) acre per day. The on-site system shall be either a sand filter system or a pressurized distribution system with a design sewage flow not to exceed four hundred fifty (450) gallons per day; or (D) The Department may approve the use of standard on-site systems to serve single family dwellings within planned developments or clustered -lot subdivisions providing: (i) The planned development or clustered -lot subdivision is not located within Gearhart, Seaside, Warrenton, or their urban growth boundaries; and (ii) The lots do not violate any rule of this Division. except the projected maximum sewage loading rate may exceed the ratio of four hundred fifty (450) gallons per acre per day; and (iii) The Department is provided satisfactory evidence through a detailed groundwater study that the use of standard systems will not constitute a greater threat to groundwater quality than would occur with the use of sand filter systems or pressurized distribution systems. (6) Within areas east of the Cascade Range where the annual precipitation does not exceed twenty (20) inches, and after evaluating the site, the Agent may issue a construction - installation permit authorizing installation of a standard system to serve a single family dwelling, provided the requirements in subsections (6)(a) and (b) of this rule are met. (a) Minimum Site Criteria: (A) The property is twenty (20) acres or larger in size, with planning restrictions that prohibit division of the property into parcels containing less than twenty (20) acres; (B) The property is not within an Urban Growth Boundary; SSRULE.2 (9-16-86) 71-99 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program . OA 7 -x,95% (C) The slope gradient does not exceed thirty (30) percent; (D) The soils are diggable with a backhoe to a depth of at least twenty-four (24) inches; (E) The site is found to comply with the provisions of OAR 340-71-220(2)(b,e,f,g.h, and i). (b) Minimum Construction Requirements: (A) The system shall contain not less than two hundred twenty-five (225) linear feet of disposal trench for projected sewage flows not exceeding four hundred fifty (450) gallons per day. Larger sewage flows shall be sized on the basis of seventy-five (75) linear feet per each one hundred fifty (150) gallons of projected flow. (B) The system shall be constructed and backfilled in compliance with OAR 340-71-220: sections (4), (5). (6). (8). (9). (10). (11), and (12). (c) At the discretion and request of the owner or the owner's authorized representative, a single application may be submitted to the Agent for both a site evaluation report and a construction -installation permit. The application would include the sum of the fees for both activities, pursuant to OAR 340-71-140(1)(a)(A) and OAR 340-71-140(1)(b)(A)(iii), as well as the following: (A) Favorable land use compatibility statement from the appropriate land use authority signifying that the proposed land use is compatible with the Land Conservation and Development Commission acknowledged comprehensive plan or complies with the statewide planning goals. (B) Property development plan acceptable to the Agent showing the location of existing and proposed improvements, including the locations of the dwelling and sewage disposal system. (C) All other exhibits the Agent finds are necessary to complete the application. (d) The Agent may waive the pre -cover inspection for a system installed pursuant to this section, provided the system installer certifies in writing that the system was installed in accordance with the permit plans and conditions. SSRULE.2 (9-16-86) 71-100 Os- Site Sewage Disposal DEP r 340-71-401 MID-MULTNCmAH COUNTY, CESSPOOL AMD SEEPAGE PIT USE. (1) This rule shall be applicable only within the area def ined in Appendix B of the document entitled Evaluation of Hearing Record for Proposal to Declare a Threat to Drinking Water in a Specifically Defined Area of Mid -Multnomah County Pursuant to ORS 454.275 et. seq.. February 6, 1986. (2) Favorable site evaluation reports and new construction - installation permits for cesspool and seepage pit sewage disposal systems may be issued within the area defined in section (1) of this rule, provided all of the following conditions are met: (a) Construction of sewers and connection thereto is on schedule as defined in the Mid -Multnomah County Sewer Implementation Plan, September 1985. (b) The total waste load discharged into cesspool and seepage pit sewage disposal systems within the affected area at any time does not exceed that indicated by the EQC Bencb=ark Removal Rate line in Figure 4-1, of Mid -Multnomah County Sewer Implementation Plan, September 1985, based on the assumption that fifty-six thousand (56,000) single family dwelling unit equivalent cesspool and seepage pit systems existed in the affected area at the beginning of 1985. (c) Sewers are not available to serve the proposed development. Connection to sewers shall be made whenever practicable. Connection will be deemed practicable if sewers are physically available as defined in OAR 340-71-160(5) (f) unless otherwise allowed by the Agent. (d) Any land division or subdivision development that involves construction of streets shall construct dry sewers at the time of development to minimize costs and disruption when connection to a sewer becomes possible. If in the judgment of the Agent construction of dry sewers is not practicable, the land division or subdivision may be approved for cesspools and seepage pits if funds in the amount of the cost of the needed dry sewer construction is placed in an interest bearing escrow account to be applied to construction of the sewers when appropriat4. under the schedule for sewer construction by the local. governments. (e) Cesspool or seepage pit systems shall not be authorized on any lot that is large enough to install a standard or other alternative on-site system. (f) Site Criteria: SSRULE.2 (9-16-86) 71-101 Ow -Sita Sewage Disposal DEPARTMENT OF (A) The permanent water table is sixteen (16) feet or greater from the surface. (B) Gravelly sand, gravelly loamy sand, or other equally porous material occurs in a continuous five (5) foot deep stratum within twelve (12) feet of the ground surface. (C) A layer that limits effective soil depth does not overlay the gravel stratum. (D) The site is found to comply with the provisions of OAR 340-71-220(2)(e, f, and i). (3) Construction Requirements: (a) Each cesspool and seepage pit shall be installed in a location to facilitate future connection to a sewerage system when such facilities become available. (b) Maximum depth of cesspools and seepage pits shall be thirty- five (35) feet below ground surface. (c) The cesspool or seepage pit depth shall terminate at least four (4) feet above the water table. (d) Cesspool and seepage pit structures shall be of a design to assure that collapse or cave-in will not occur. Diagrams 16 and 17, which show seepage pit designs, reflect an acceptable design for cesspools. (e) The provisions of OAR 340-71-220(2)(i) are met. (4) Permits to repair or replace failing cesspool or seepage pit systems may be issued if sewers are not available. Connection to sewers shall be made whenever practicable.- Connection will be deemed practicable if sewers are physically available as defined in OAR 340-71-160(5)(f) unless otherwise allowed by the Agent. The Agent may exercise judgment in determining whether strict compliance with the requirements identified in section 3 of this rule are reasonable. (5) Notwithstanding the permit duration specified in section 340-71-160(9), a permit issued pursuafit to this rule may be effective for a period of less - than one (1) year from the date of issue if specified by the Agent. (6) The Agent shall report to the Department of Environmental Quality at the end of each calendar year on the number of cesspools and seepage pits removed, the number of repair and replacement SSRULE.2 (9-16-36) 71-102 On -Site Sewage Disposal 0107 1959 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program systems authorized, and the number of new interim cesspool and seepage pit systems approved through on-site system and WPCF permit issuance. The calculated number of single family dwelling unit equivalent cesspools remaining in service shall at all times be less than or equal to the number derived for that point in time based on fifty-six thousand (56,000) units in existence at the beginning of 1985, and the target percent removed based on the benchmark removal rate as shown in Figure 4-1 of "Mid - Multnomah County Sewer Implementation Plan", September 1985. (7) For proposed new sewage loads in excess of five thousand (5000) gallons per day, applications for site evaluation reports and construction permits must be submitted to the Department of Environmental Quality. The permits shall be issued pursuant to OAR 340, Divisions 14 and 45 only after the Agent and the Department concur the provisions of subsection (2)(b) of this rule not are violated. SSRULE.2 (9-16-86) 71-103 On -Site Sewage Disposal DEPARTMENT OF EWIROID714 AL QUALITY Water Quality Program 0107 1950 340-71-410 RURAL AREA VARIANCES - (1) Variances from any standard contained in Subsections 340-71- 220(2)(a) through (h) may be granted by the Agent in certain rural zones provided: (a) The County designates and the Department accepts specific rural zoning classifications for purposes of this rule. (b) The minimum parcel size considered under this rule is designated by the County, but in no event shall it be less than ten (10) acres. (c) The parcel is an existing parcel that does not have an accessible area approvable for a standard on-site system. (d) The permit is for an on-site system designed to serve a single family dwelling, or for a commercial facility with an equivalent or less sewage flow permitted by the zone. (e) The on-site sewage disposal system will function in a satisfactory manner so as not to create a public health hazard, or cause pollution of public waters. (f) Requiring strict compliance with the standards contained in subsections 340-71-220(2)(a) through (h), would in the judgment of the Agent, be unreasonable, burdensome, or impractical due to special physical conditions or cause. (2) The conditions for rural area variances shall be set forth in an addendum to the memorandum of agreement (contract) between the County and the Department. SSRULE.2 (9-16-86) 71-104 on -Site Sewage Disposal 0107 1961 DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-415 FORMAL VARIANCES. (1) Variances from any rule or standard for on-site sewage systems, contained in these rules. may be granted to applicants for permits by the Commission after a hearing before a special variance officer. The variance officer shall make a recommendation to the Commission for or against the variance. (2) Variances from any rule contained in OAR 340, Division 71 may be granted to applicants for permits by special variance officers appointed by the Director. (3) No variance may be granted unless the Commission or a special variance officer finds that: (a) Strict compliance with the rule or standard is inappropriate for cause; or (b) Special physical conditions render strict compliance unreasonable, burdensome, or impractical. (4) Applications. (a) Applications shall be made to the Department or Agreement County as appropriate. A separate application must be filed for each site considered for a variance. (b) Each application shall by accompanied by: (A), A site evaluation report, unless waived by the variance officer; and (B) Plans and specifications for the proposed system; and (C) The appropriate fee; and (D) Other information necessary for rendering a proper decision; and (E) The application shall be signed by the property owner. (5) An applicant for a variance under this rule is not required to pay the application fee, if at the time of filing. the applicant: (a) Is sixty-five (65) years of age or older; and (b) Is a resident of the State of Oregon; and (c) Has an annual household income, as defined in ORS 310.030, of $15,000 or less; and SSRULE.2 (9-16-86) 71-105 Oa -Site Sewage Disposal 0107 196 DEPARTMENT OF ENVIRODIl MAL QUALITY Water Quality Program (d) Has not previously applied under the provisions of this section. SSRULE.2 (9-16-86) 71-106 On --Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL. QUALITY Water 340-71-420 HARDSHIP VARIMCSS. (1) The Commission may grant variances from rules or standards pertaining to on—site sewage disposal systems in cases of extreme and unusual hardship. (2) The Commission may consider the following factors in reviewing an application for a variance based on hardship: (a) Advanced age or bad health of applicant. (b) Need of applicant to care for aged, incapacitated or disabled relatives. (c) Relative insignificance of the environmental impact of granting a variance. (3) Hardship variances granted by the Commission may contain conditions such as: (a) Permits for the life of the applicant. (b) Limiting the number of permanent residents using the system. (c) Use of experimental systems for specified periods of time. (4) Before an application is considered for a hardship variance it must be denied for a standard variance on the basis of technical rule considerations. At the time of application, the applicant must designate on the application whether it is to be considered for a hardship variance. (5) Documentation of hardship must be provided before the application is referred to the Commission for action. (6) Department personnel shall strive to aid and accommodate the needs of applicants for variances due to hardship. SSRULE.2 (9-16-86)' 71-107 Ott—Site Sewage Disposal 0107 1964. DEPAR724M OF ENVIRONMENTAL QU41TY Water Quality Program 340-71-425 VARIANCE OFFICERS. (1) To qualify for appointment as a special variance officer after the effective date of these rules an individual must: (a) Have three (3) years full time experience in subsurface sewage disposal methods since January 1, 1974; one (1) year of which shall have been in Oregon; and (b) Have attended one (1) or more seminars, workshops, or short courses pertaining soils and their relationship to subsurface sewage disposal. (2) Agreement (contract) counties may request that a county staff member, meeting the above qualifications, be appointed special variance officer. That staff member, if appointed, would perform the Department's variance duties within that county. SSRULE.2 (9-16-86) 71-108 Oa -Sita Sewage Disposal 0107 1.965 DEP"=MT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-430 VARIANCE HEARINGS. (1) The variance officer shall hold a public information type hearing on each variance application. (2) -The hearing shall be held in the county where the property described in the application is located. (3) Each variance shall be heard within thirty (30) days after receipt of a completed application. (4) A decision to grant or deny the variance shall be made in writing within thirty (30) days after completion of the hearing. If the variance is granted. the variance officer shall set forth in writing the specifications, conditions and location of the system. (S) The burden of presenting the supportive facts shall be the responsibility of the applicant. (6) The variance officer shall visit the site of the proposed system prior to conducting the hearing. (7) Except for hardship variances, granted variances shall run with the land. SSRULE.2 (9-16-86) 71-109 Oa -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program . 0107 196-6 340-71-435 VARIANCE PERMIT ISSUANCE. INSPECTIONS. CERTIFICATE OF SATISFACTORY COMPLETION. (1) After a variance is granted the appropriate Agent shall be notified in writing. (2) In nonagreement counties the Department shall issue system construction installation permits, perform necessary inspections and issue Certificates of Satisfactory Completion. (3) In agreement counties, the county shall issue system construction installation permits, perform necessary inspections and issue Certificates of Satisfactory Completion. SSRULE.2 (9-16-86) 71-110 Ow -Site Sewage Disposal DEPARIMMT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-440 VARIANCE APPEALS. 0107 -1,`7 Decisions of variance officers to grant or deny a variance may be appealed to the Commission. SSRULE.2 (9-16-86) 71-111 Ow -Site Sewage Disposal. DEPARTMENT OF ENVIRONMENTAL QUALITY- Water Quality Program 340-71-445 VARIANCE ADMINISTRATIVE REVIEW- The Department may review all records and files of variance officers to determine compliance or noncompliance with these rules. SSRULE.2 (9-16-86) 71-112 On7--Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-450 EBPSRIMLNTAL SYSTEMS.�+� (1) Policy. Alternative technologies to standard on-site sewage systems are needed in areas planned for rural or low density development. It is the policy of the'Commission to allow the Department to pursue a program of experimentation for the purpose of obtaining sufficient data for the development of alternative sewage disposal systems, which may benefit significant numbers of people within Oregon. (2) Permit Required. Without first obtaining a permit from the Department, no person shall construct an experimental on-site sewage treatment and disposal system. (3) Application Procedures: (a) Application for experimental systems shall be made on Department forms. (b) The application shall be complete, signed by the owner and be accompanied by the required fee. (c) The application shall include detailed system design specifications and plans and any additional information the Department considers necessary. (d) The owner shall agree, in writing, to hold the State of Oregon, its officers, employes, and agents haiml ess of any and all loss and damage caused by defective installation or operation of the proposed system. (4) Criteria For Approval. Sites may be considered for experimental system permits where: (a) Soils, climate, groundwater, or topographical conditions are common enough to benefit large numbers of people. (b) A specific acceptable backup alternative is available in the event of system failure. (c) For absorption systems, soils.in both original and system replacement areas are similar. (d) Installation of a particular system is necessary to provide a sufficient data sampling base. (e) Zoning, planning, and building requirements allow system installation. (f) A single family dwelling will be. served. SSRULE.3 (9-16-86) 71-113 Otr-Site Sewage Disposal 0107 1970 . DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program (g) The system will be used on a continuous basis during the life of the test project. (h) Resources for monitoring, sample collection, and laboratory testing are available. (i) Legal and physical access by easement for construction inspections and monitoring are available. (j) The property owner records a Department approved affidavit which notifies prospective property purchasers. of the existence of an experimental system. (k) The parcel size is at least one (1) acre. (S) Permit Conditions. The system installation permit shall: (a) Specify method and manner.of system installation. operation, and maintenance; (b) Specify method, manner, and duration of system testing and monitoring; (c) Identify when and where system is to be inspected; (d) Require that permit not be transferable; - (e) Require system construction and use within one (1) year of permit issuance. (6) Denial Appeal. The decision of staff to either issue or deny a permit may be reviewed by the Director. The Director may affirm or reverse the decision. (7) Inspection of Installed System: (a) Upon completing construction for each inspection phase required ander the permit, the permit holder shall notify the Department. (b) The Department shall inspect construction to determine whether it complies with permit conditions and requirements. (c) After system installation is complete and complies with permit conditions, a Certificate of Satisfactory Completion shall be issued. (8) Repair or Replacement of System. If the Department finds the operation of the system is unsatisfactory, the owner upon written notification. shall promptly repair or modify the system, replace SSRDLE.3 (9-16-86) 71-114 Oa—Site Sewage Disposal OF Wa it with another acceptable system, or as a last resort, abandon the system. (9) System Monitoring. The system shall be -monitored by the Department in accordance with a schedule contained in the permit. SSRULE.3 (9-16-86) 71-115 On -Site Sewage Disposal DEPARTMENT 340-71-460 MORATORIUM AREAS. Proaram ' 0107 1972 (1) Whenever the Commission finds that construction of subsurface or alternative sewage disposal systems should be limited or prohibited in an area, it shall issue an order limiting or prohibiting such construction. (2) The order shall be issued only after public hearing for which more than thirty (30) days notice is given. (3) The order shall be a rule of this division which contains a general description of the moratorium area. A more detailed description of the area, if needed, shall be an appendix to these rules. (4) No permit or site evaluation report shall be issued for construction of a new or expanded system which would violate any order of the Commission issued pursuant to ORS 454.685. (5) Criteria For Establishing Moratoriums. In issuing an order under this section the Commission shall consider the factors contained in ORS 454.685(2). (6) Specific Moratorium Areas. Pursuant to ORS 454.685, the Agent shall not issue sewage system construction installation permits or approved site evaluation reports within the boundaries of the following areas of the state: (a) Benton County — Kingston Heights Subdivision; (b) Benton County — Kingston Heights Subdivision. First Addition; (c) Benton County — Princeton Heights Subdivision; (d) Benton County — Princeton Heights Subdivision, First Addition; (e) Lane County — Community of Dexter, as follows: The area generally know as Dexter, and defined by the Boundary submitted by the Board of County Commissioners for Lane, which is bounded on the Northeast by Willamette Highway No. 58, and contains those properties Southwesterly of Highway No. 58 in the following tax assessment maps of Lane County: T 19 S, R 1 W. Section 16.2. T 19 S. R 1 W. Section 16.32, T 19 S. R 1 W. Section 16.31, T 19 S, R 1.W. Section 16.42, and T 19 S, R 1 W. Section 16 and index located totally within Lane County. SSRIILE.3 (9-16-86) 71-116 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL Water ity Program �7 1973 (f) Lane County - Clear Lake Watershed of the North Florence Dunal Aquifer Area, as follows: The area hereby known as the Clear Lake Watershed of the North Florence Dunal Aquifer Area defined by the hydrologic boundaries identified in the June 1982, 208 North Florence Dunal Aquifer Study which is the area beginning at a point known as Tank One, located in Section One, Township 18 South, Range 12 West, of the Willamette Meridian, Lane County, Oregon: Run thence S. 670 50' 51.51- E. 97.80 ft. to the True Point of Beginning; Run thence S. 050 40' 43.0" W. 1960.62 ft. to a point, Run thence S. 040 58' 45.4" W. 1301.91 ft. to a point, Run thence S. 520 44' 01.0" W. 231.21 ft. to a point. Run thence S. 150 20' 45.4" W. 774.62 ft. to a point, Run thence S. 310 44' 14.0" W. 520.89 ft. to a point. Run thence S. 000 24' 43.9" W. 834.02 ft. to a point. Run thence S. 070 49' 01.8" W. 1191.07 ft. to a point, Run thence S. 500 26' 06.3" W. 731.61 ft. to a point, Run thence S. 020 51' 10.511 W. 301.37 ft. to a point, Run thence S. 360 37' 58.2" W. 918.41 ft. to a point, Run thence S. 470 12' 26.3" W. 1321.86 ft. to a point, Run thence S. 720 58' 54.2" W. 498.84 ft. to a point. Run thence S. 850 44' 21.3" W. 955.64 ft. to a point, Which is N. 110 39' 16.9" W. 5434.90 ft. from a point known as Green Two (located in Section 13 in said Township and Range);. Run thence N. 580 09' 44.1" W. 1630.28 ft. to a point, Run thence N. 250 231-10.1" W. 1978.00 ft. to a point. Run thence N. 160 34' 21.0" W. 1731.95 ft. to a point, Run thence N. 060 13' 18.0" W. 747.40 ft. to a point. Run thence N. 030 50' 32.8" E. 671.51 ft. to a point, Run thence N. 590 33' 18.9" E. 1117.02 ft. to a point. Run thence N. 590 50' 06.0" E. 2894.56 ft. to a point, Run thence N. 480 28' 40.0" E. 897.56 ft. to a point. Run thence N. 310 29' 50.7" E. 920.64 ft. to a point, Run thence N. 190 46' 39.6" E. 1524.95 ft. to a point. Run thence S. 760 05' 37.1" E. 748.95 ft. to a point, Run thence S. 570 33' 30.2" E. 445.53 ft. to a point. Run thence S. 780 27' 44.9" E. 394.98 ft. to a point. Run thence S. 610 55' 39.0" E. 323.00 ft. to a point, Run thence N. 890 04' 46.8" E. 249.03 ft. to a point, Run thence S. 670 43' 17.4" E. 245.31 ft. to a point, Run thence S. 790 55' 09.8" E. 45.71 ft. to a point, Run thence S. 830 59' 27.6" E. 95.52 ft. to a point, Run thence N. 420 02' 57.2" E. 68.68 ft. to a point, Run thence S. 800 41' 24.2" E. 61.81 ft. to a point. Run thence S. 10047' 03.5" E. 128.27 ft. to the True Point of Beginning; and containing all or portions of T17 S. R12W, Section 35 and 36, and T18S. R12W, Sections 1, 2. 11 and 12; W.M., Lane County. SSRULE.3 (9-16-86) 71-117 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-71-500 COMMUNITY SYSTEMS. (1) For the purpose of these rules: Q 1 o e 10074 (a) "Community System" means an onsite system which will serve more than one (1) lot or parcel; or more than one (1) condominium unit; or more than one (1) unit of a planned unit development. (b) "Person" means individuals, corporations, associations, firms, partnerships, joint stock companies, public and municipal corporations, political subdivisions, the State and any agencies thereof, and the federal government and any agencies thereof. (2) Without first applying for and obtaining a construction installation permit, no person shall install a community on-site system. (3) Proposed community systems with projected sewage flcws greater than two thousand five hundred (2,500) gallons per day shall have plans reviewed and approved by the Department prior to construction permit issuance. (4) Plans for all community systems shall include operation and maintenance details including details for financing system operation and maintenance. (5) The site criteria for approval of community systems shall be the same as required for standard subsurface systems contained in section 340-71-220(2), or in the case of community alternative systems, the specific site conditions for that system contained in rules: 340-71-260 through 340-71-275; 340-71-290 through 340-71-305; 340-71-315; and 340-71-345. (6) Operation Responsibility. (a) Responsibility for operation and maintenance of community systems shall be vested in a municipality as defined in ORS 454.010(3), or an Association of Unit Owners.as defined in ORS 94.004 and ORS 94.146. (b) Unless otherwise required by permit, community systems shall be inspected at least annually by the responsible entity. SSRULE.3 (9-16-86) 71-118 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 0107 19 340-71-520 LARGE SYSTEMS. 75 (1) For the purpose of these rules "large system" means any system with a projected daily sewage flow greater than two thousand five hundred (2,500) gallons. (2) Special Design Requirements. Unless otherwise authorized by the Department, large systems shall comply with the following requirements: (a) Large system absorption facilities shall be designed with pressure distribution. (b) The disposal area shall be divided into relatively equal units. Each unit shall receive no more than thirteen hundred (1300) gallons of effluent per day. (c) The replacement (repair) disposal area shall be dividedinto relatively equal units, with a replacement disposal area unit located adjacent to an initial disposal area unit. (d) Effluent distribution shall alternate between the disposal area units. (e) Each system shall have at least two (2) pumps or siphons. (f) ,The applicant shall provide a written assessment of the impact of the proposed system upon the quality of public waters and public health. (3) Plans and specifications for large systems shall be prepared by any competent professional with education or experience in the specific technical field involved. The professional may accept an assignment requiring education or experience outside of his/her own field of competence provided he/she retains competent and legally qualified services to perform that -part of the assignment outside his/her own field of competence, his/her client or employer approves this procedure, and he/she retains responsibility to his/her client or employer for the competent performance of the whole assignment. (4) Construction Requirements: (a) Construction shall be in substantial' conformance with approved plans and specifications and any terms of the permit issued by the Agent. (b) After completion of the system the professional shall certify that the system was installed in accordance with approved plans and specifications. SSRULE.3 (9-16-86) 71-119 On --Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 010 '15-76 340-71-600 SEWAGE DISPOSAL SERVICE. (1) For the purpose of these rules "Sewage Disposal Service" means: (a) The installation of on-site sewage disposal systems (including the placement of portable toilets), or any part thereof; or Cb) The pumping out or cleaning of on-site sewage disposal systems (including portable toilets), or any part thereof; or (c) The disposal of material derived from the pumping out or cleaning of on. -site sewage disposal systems (including portable toilets); or (d) Grading. excavating. and earth -moving work connected with the operations described in subsection (1) (a) of this rule, except streets, highways, dams, airports or other heavy construction projects and except earth -moving work performed under the supervision of a builder or contractor in connection with and at the time of the construction of a building or structure; or (e) The construction of drain and sewage lines from five (5) feet outside a building or structure to the service lateral at the curb or in the street or alley or other disposal terminal holding human or domestic sewage. (2) No person shall perform sewage disposal services or advertise or represent himself/herself as being in the business of performing such services without first obtaining a license from the Department. Unless suspended or revoked at an earlier date, a Sewage Disposal Service license. issued pursuant to this rule expires on July 1 neat following the date of issuance. (3) Those persons making application for a sewage disposal service license shall: (a) Submit a complete license application form to the Department for each business; and (b) File and maintain with the. Department original evidence of surety bond, or other approved equivalent security, in the penal sum of two thousand five hundred dollars ($2,500) for each business; and (c) Shall have pumping equipment inspected by the Agent annually if intending to pump out or clean systems and shall complete the "Sewage Pumping Equipment Description/Inspection" form SSRULE.3 (9-16-86) 71-120 On -Site Sewage Disposal 0107 1977 DEPARTMENT OF ENVIRONMENTAL QUALITY water Quality Program supplied by the Department. An inspection performed after January lst shall be accepted for licensing the following July 1st; and (d) Submit the appropriate fee as set forth in subsection 340-71-140(1)(i) for each business. (4) A Sewage Disposal Service license may be transferred or amended during the license period to reflect changes in business name, ownership, or entity (i.e. individual, partnership, or corporation), providing: (a) A complete application to transfer or amend the license is submitted to the Department with the appropriate fee as set forth in subsection 340-71-140(1)(i); and (b) The Department is provided with a rider to the surety, or a new form of security as required in subsection (3)(b) of this rule; and (c) A valid Sewage Disposal Service license (not suspended, revoked, or expired) is returned to the Department; and (d) If there is a change in the business name, a new "Sewage Pumping Equipment Description/Inspection" form for each vehicle is submitted to the Department. (5) The type of security to be furnished pursuant to OAR 340-71- 600(3) (b) may be: (a) Surety bond executed in favor of the State of Oregon on a form approved by the Attorney General and provided by the Department. The bond shall be issued by a surety company licensed by the Insurance Commissioner of Oregon. Any surety bond shall be so conditioned that it may be cancelled only after forty five (45) days notice to the Department, and to otherwise remain in effect for not less than two (2) years following termination of the sewage disposal service license, except as provided in subsection (e) of this section; or (b) Insured savings account irrevocably assigned to the Department, with interest earned by such account made payable to the depositor; or (c) Negotiable securities of a character approved by the State Treasurer, irrevocably assigned to the Department, with interest earned on deposited securities made payable to the depositor. SSRULE.3 (9-16-86) 71-121 Os -Site Sewage Disposal 0107 1978 DEPARIT4ENT OF ENVIRONMENTAL QUALITY Water Quality Program 4 (d) Any deposit of cash or negotiable securities under ORS 454.705 shall remain in effect for not less than two (2) years following termination of the sewage disposal service' license except as provided in subsection (e) of this section. A claim against such security deposits must be submitted in writing to the Department, together with an authenticated copy of: (A) The court judgment or order requiring payment of the claim; or (B) Written authority by the depositor for the Department to pay the claim. (e) When proceedings under ORS 454.705 have been commenced while the security required is in effect, such security shall be held until final disposition of the proceedings is made. At that time claims will be referred for consideration of payment from the security so held. (6) Each licensee shall: (a) Be responsible for any violation of any statute, rule, or order of the Commission or Department pertaining to his licensed business. (b) Be responsible for any act or omission of any servant, agent, employee, or representative of such licensee in violation of any statute, rule, or order pertaining to his license privileges. (c) Deliver to each person for whom be performs services requiring such license, prior to completion of services, a written notice which contains: (A) A list of rights of the recipient of such services which are contained in ORS 454.705(2); and (B) Name and address of the surety company which has executed the bond required by ORS 454.705(1); or (C) A statement that the licensee has deposited cash or negotiable securities for the benefit of the Department in compensating any person injured by failure of the licensee to comply with ORS 454.605.to 454.745 and with rules of the Environmental Quality Commission (d) Keep the Department informed on company changes that affect the license, such as business name change, change from SSRULE.3 (9-16-86) 71-122 Otr-Site Sewage Disposal DEPAR== OF ENVIROMWM QUALITY Water Quality Program o7 1979 individual to partnership, change from Partnershioo corporati.on,•change in ownership, etc. (7) Misuse of License: (a) No licensee shall permit anyone to operate under his license, except a person who is working under supervision of the licensee. (b) No person shall: (A) Display or cause or permit to be displayed, or have in his possession any license, knowing it to be fictitious, revoked, suspended or fraudulently altered. (B) Fail or refuse to surrender to the Department any license which has been suspended or revoked. (C) Give false or fictitious information or knowingly conceal a material fact or otherwise commit a fraud in any license application. (8) Pumping and Cleaning Responsibilities: (a) Persons performing the service of pumping or cleaning of sewage disposal facilities shall avoid spilling of sewage while pumping or while in transport for disposal. (b) Any spillage of sewage shall be immediately cleaned up by the operator and the spill area shall be disinfected. (9) License Suspension or Revocation: (a) The Department may suspend, revoke, or refuse to grant, or refuse to renew, any sewage disposal service license if it finds: (A) A material misrepresentation or false statement in connection with a license application; or (B) Failure to comply with any provisions of ORS 454.605 through 454.785, the rules of the Environmental Quality Commission or an order of the Commission or Department; or (C) Failure to maintain in effect at all times the required bond or other approved equivalent security, in the full amount specified in ORS 454.705; or SSRULE.3 (9-16-86) 71-123 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QU4ITY Water Quality Program . 0107 1%VQV (D) Nonpayment by drawee of any instrument tendered by applicant as payment of license fee. (b) Whenever a license is suspended, revoked or expires. the licensee shall remove the license from display and remove all Department identifying labels from equipment. The licensee shall surrender the suspended or revoked license, and certify in writing to the Department within fourteen (14) days after suspension or revocation that all Department identification labels have been removed from all equipment. (c) A sewage disposal service may not be considered for re - licensure for a period of at least one (1) -year after revocation of its license. (d) A suspended license may be reinstated. providing: (A) A complete application for reinstatement of license is submitted to the Department, accompanied by the appropriate fee as set forth in Subsection 340-71- 140(1) (i); and (B) The grounds for suspension have been corrected; and (C) The original license would not have otherwise expired. (10) Equipment Minimum Specifications: (a) Tanks for pumping out of sewage disposal facilities shall comply with the following: (A) Have a liquid capacity of at least five hundred fifty (550) gallons. EXCEPTION: Tanks for equipment used exclusively for pumping chemical toilets not exceeding fifty (50) gallons capacity, shall have a liquid capacity of at least one hundred fifty (150) gallons. (B) Be of watertight metal construction; (C) Be fully enclosed; (D) Have suitable covers to prevent spillage. (b) The vehicle shall be equipped with either a vacuum or other type pump which will not allow seepage from the diaphragm or other.packing glands and which is self priming. SSRIILE.3 (9-16-86) 71-124 Oa -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL' QUALITY Water Quality Program (c) The sewage hose on vehicles shall be drained, capped, and stored in a manner that will not create a public health hazard or nuisance. (d) The discharge nozzle shall be: (A) Provided with either a camlock quick coupling or threaded screw cap. (B) Sealed by threaded cap or quick coupling when not in use. (C) Located so that there is no flow or drip onto any portion of the vehicle. (D) Protected from accidental damage or.breakage. (e) No pumping equipment shall have spreader gates. (f) Each vehicle shall at all times be supplied with a pressurized wash water tank, disinfectant, and implements for cleanup. (g) Pumping equipment shall be used for pumping sewage disposal facilities exclusively unless otherwise authorized in writing by the Agent. (h) Chemical toilet cleaning equipment shall not be used for any other purpose. (11) Equipment Operation and Maintenance: (a) When in use, .pumping equipment shall be operated in a manner so as not to create public health hazards or nuisances. (b) Equipment shall be maintained in a reasonably clean condition at all times. (12) Vehicles shall be identified as follows: (a) Display the name or assumed business name on each vehicle cab and on each side of a tank trailer: (A) In letters at least three (3) inches in height; and (B) In a color contrasting with the background. (b) Tank capacity shall be printed on both sides of the tank: (A) In letters at least three (3) inches in height; and SSRULE.3 (9-16-86) 71-125 Oa -Site Sewage Disaosail DEPARTMENT OF'ENVIRODIIMTAL QUALITY Water Quality Program . 0107 1982 (B) In a color contrasting with the background. (c) Labels issued by the Department for each current license period shall be displayed at all times at the front, rear, and on each side of the "motor vehicle" as defined by United States Department of Transportation Regulations, Title 49 U. S. C. (13) Disposal of Pumpings. Each licensee shall: (a) Discharge no part of the pumpings upon the surface of the ground unless approved by the Department in writing. (b) Dispose of pumpings only in disposal facilities approved by the Department. (c) Possess at all times during pumping, transport or disposal of pumpings, origin -destination records for sewage disposal services rendered. (d) Maintain.on file complete origin -destination records for sewage disposal services rendered. Origin -Destination records shall .include: (A) Source of pumpings on each occurrence, including name and address. (B) Specific type of material pumped on each occurrence. (C) Quantity of material pumped on each occurrence. (D) Name and location of authorized disposal site, where pumpings were deposited on each occurrence. (E) Quantity of material deposited on each occurrence. (e) Transport pumpings in a manner that will not create a public health hazard or nuisance. SSRULE.3 (9-16-86) 71-126 On -Site Sewage Disposal TABLE 1 0107 1983 Mi ni zz- Separatim Distances r0� t= TaZJJL an Sewage Disposal Other Treatment Units. Area _urLo Eiflueat- Sewer and Items ReQuiring Setback geplacement Area Distribution Uritis 1. Groundwater Supplies 100' 501 2. Temporarily Abandoned Wells 100' 50' 3. Springs: — upgradient 501 100 50 50' — downgradient *4. Surface Public Waters: — year round 00' 150' 50' S0' — seasonal 5. Intermittent Streams: — Piped (watertight not less than 25' from 20' 201 any part of the on --site system) 501 -- Unpiped 501 6. Groundwater Interceptors: 20' 20' On a slope of 3% of less On a slope greater than 3% 10' — Upgradient 10, S01 251 — Downgradient 7. Irrigation Canals: 25 ' 251 Limed (watertight canal) Unlined 251 251 -- Upgradient 50' 50' — Dowagradient 8. Cuts Manmade in Excess of 30 Inches (Top of Downslope Cut): — Which Intersect Layers that Limit Effective Soil Depth Within 48 50' 25' Inches of Surface — Which Do Not Intersect Layers That Limit Effective Soil Depth 25110' 9. Escarpments: — Which Intersect Layers that Limit 10' Effective Soil Depth 501 — Which Do Not Intersect Layers 10' That Limit Effective Soil Depth 251 10. Property Lines 10' 10' 11. Water Lines + 10' 10' 12. Eouadation Lines of any Building. 51 Including Garages and Out Buildings 10' * This does not prevent stream crossings of pressure effluent sewers. S00:h 12/31/85 Table - _ TABLE 2 • Quantities of Sewage Flows 010'7 1984 Column 1 Column 2 Minimum Gallons per Establishment Type of Establishment Gallons Per Day Per Day Airports Bathhouses and swimming pools Cams: (4 persons per campsite, where applicable) Campground with central comfort stations With flush toilets, no showers canstructicn cams (semi-permanent) Day cams (no meals served) Resort (night and day) with limited plumbing Luxury camps Churches Country clubs country clubs Dwellings: Boarding rouses Additional for non-residental boarders Rc=rV houses Condominiums, Multiple family dwellings (Including apartments) Single family dwellings With more than 2 bedrooms Factories (exclusive of industrial wastes, with shower facilities) Factories (exclusive of industrial wastes, without shower facilities Hospitals hotels with private baths Hotels without private baths institutions other than hospitals Laundries, self-service :bile r=te par ks Motels (with bath, toilet, and kitchen .asses) Motels (without kitchens) Picnic Panics (toilet wastes only) Picnic Parks (with bathhouses, showers and !lush toilets) Restaurants Restaurants (single -service) Restaurants (wit's bars and/or lounges) Schools: Boarding Day, without gyms, cafeterias or showers Day, with gyms, cafeterias and showers Day, with cafeteria, but without gyros or showers Service Stations Swimming pools and bathhouses '^heaters : Movie Drive -In i T --ave! ;railer parks (without individual water and sewer hookups) ':ravel trailer parks (with individual water and sewer hookups) Workers: Constructian (as semi-permanent camQs) Day, at schools and offices Except as otherwise provided in these rules. 5 (per passenger) 150 10 (per person) 300 35 (per person) 700 500 25 (Par person) 1000 50 (per person) 300 15 (per person) 750 50 (per person) 1000 2000 100 (per person) 150 5 100 (per seat) (per resident member) 2000 25 (per non-resident member present) — 150 (per bedroom) 600 10 (per person) — 500 80 (per person) 900 300 (per unit) 3000 300 (not exceeding 2 bedrooms) 450* 75 (for third & each succeeding bedroom) 450 35 (per person per shift) 300 15 (per•perscn per shift) 150 250 (per bed space) 2500 120 (per room) 600 500 100 125 (per roam) (per bed space) 1250 500 (per machine) 2500 250 (per space) 750 100 (per bedroom) 500 80 (per bedroom) 400 5 (per picnicker) SO 10 (per picnicker) 300 40 (per seat) 800 2 (per customer) 300 50 (per seat) 1000 100 (per person) 3000 15 (per person) 450 25 (per person) 150 20 (per person) 600 10 (per vehicle served) 500 10 (per person) 300 5 (per seat) 300 20 (per car space) 1000 50 (per space) 300 100 (per space) 500 50 (per person) 1000 15 (per shift) SO 0=4 11) Tables - 2 50" — 48" — 45„ — F—T= SOIL DEPTH 40" - IN "HES 35" — 30" — 0.0'7 1985 TABLE 3 SLOPE, EFFECTIVE SOIL DEPTH RELATIONSHIP Sys 12% 15% 20% 25 30%* PERCENT SLOPE * :men slope exceeds 30 percent, rules on steep slope systems apply. (Refer to OAR 340-71-310) -abies - mss �.0 • FA s Sys 12% 15% 20% 25 30%* PERCENT SLOPE * :men slope exceeds 30 percent, rules on steep slope systems apply. (Refer to OAR 340-71-310) -abies - TABLE 4 0107 198E -Minimum length of disposal trench (linear feet) required per one hundred fifty (150) gallons projected daily sewage flow determined from soil texture versus effective soil depth. 18" to Less .than 24" 125 150 175 EFFECTIVE 24" to Less than 36" 100 125 150 SOIL 36" to less than 48" 75 100 125 DEPTH 43" or more 50 75 125 A B C SOIL GFZUP * Soil Group A Sand, Loamy Sand, Sandy Loam Soil Group B Sandy Clay Loam, Loam, Silt Loam, Silt, Clay Loam Soil Group C Silty Clay Loam, Sandy Clay, Silty Clav, Clay Tables - 4 - `-'% 3 7,3LE 5 Minimum length of dispc-al trench (linear feet) required per one hundred fifty (150) gallons projected daily sewage flow determined from soil texture versus depth to temporary groundwater. DEPTH 24'1 To Less 100 125 150 TO Than 48" TEMPORARY 4811 1, GROUNDWATER or 50 75 125 More A B C SOIL GROUP * Soil Group A Sand, Loamy Sand, Sandy Loam Soil Group B Sandy Clay Loam, Loam, Silt Loam, Silt, Clay Loam Soil Group C Silty Clay Loam, Sandy Clay, Silty Clay, Clay T ables - 5 7,127,/3 TABLE 7 0197 1989 Sieve Sizes Millimeters Clay vv Silt Very fine sand 200 .075 Ne Fine sand 66 Medium sand 35 .55 Coarse sandto _ . Very coarse sand ,^ ^^ Fine gravel 4 4.75 3/8" 9.5 17'2 r . Coarse gravel Cobbles USDA SOM CLASSIFICATICM SIZES OF SOIL SEPARATES OAL24 (1) Tables - 7 TABLE 8 SEPARATION DISTANCES 0107 1990. FOR NONWATM-CARRIED WASTE DISPOSAL FAC JTIES Unsealed Earth Type Privies, Self -Contained Nonwater-Carried Gray Water Waste Disposal Waste Disposal Facility Sump and Seepage Chambers Groundwater supplies including 100' springs and cisterns 50' Surface public waters, excluding 50, 100' intermittent streams Intermittent streams Property OAL24 ( 1) Tables - 8 DIAGRAM 1 TYPICAL SER= DISTRIBUTION SYSTEM (With Drop Boxes) 0107 1991 Structure Building Drain b C Building Sewer v :7 10, 0 :4 -<-Septic Tank i y to Z. Drop Box Effluent Sewer ' ! I Future I eader Piping A \--Lateral Piping - Replacement i { Area —Disposal Trenches . i L Plan View S jOAe J- �4" to 36" 12-1 - � 1 10' Min. 1 :(--c--ion A - -, itAGi,L1I•:S -: TYPICAL SERIAL DISTRIBUTION SYSTEM Building (Without Drop Boxes) -Drain _Building Sewer S 010 7 1992 7 -Septic Tank Y Qj Min. , o Min. o S4 _ rn Effluent- Sewer ffluentSewer Disposal Trenches 01 14= Watertight Joints Lateral Piping Zi 1 i Future : i Replacement i• Area Watertight Joints— v Slope 691WA 12" to 24" Undisturbed j Earth 44s:i Ls.7._..,:s� < --- 10' Min - 1 G-L.AMS- DIAGRAM 3 TYPICAL EQUAL DISTRIBUTION SYSTEM (With Distribution Box) 0107 1993 Effluent Sewer Structure Septic 51 Tank Box EHeader eader Pipes �— — LA Building Future Drain Replacement Building Area Sewer '10' Min. 18" � Lateral Piping at the to 36" Same Elevation 24" Section A - A TYPICAL EQUAL DISTRIBUTION SYSTEM Effluent Sewer Pipe 41 0107 1994 • Distribution Box - — :._ •S I � —Header piping 8• 10' • I ; i Lateral Piping--\ 8' 10' \ I Y - Disposal Trenches 8' With Distribution Box Effluent Sewer Pipe Disposal Trenches -- 8' 10' I +1 1 �j 8' 10' --- Lateral Piping -- 8'' 10' Without Distribution Box -DLAGIW-1S- 4 DIAGRAM 5 TYPICAL LOOP EQUAL DISTRIBUTION SYSTEMS 01017 1995 Effluent Sewer Distribution Box T � ! 4' Header Piping + Disposal Trench 8' I�j 10' � 1+ 10' 1�{10' Lateral Piping- 8 ISI i 0 Effluent Sewer — -- Disposal Trench 8' i� 10' [7.l 8' 10' ! �1 I Lateral Piping --- S 10' U F H N c 0107 1996 1-4 1-4 .14 w 0 1-4 `n.1 i -[ 1-4 44 ,x N ito ... O a -4 r -.1 ai J Ull m �.J > W -��- 0 En G W ��• ' m O G m � o E 04 r i a4 c � � w tn .14 0 I � i C � V L � V • m to .v .. U p L 1a O X JI :J w m i J O - cn �► — L .a ^_ - �� ` C r 0 1 vl w u C C y >. y J —4 0+ a) 0107 199'7 a 0, -4 a C O t0 �? \ �4 ,4 4 N E 1 c 0a \ -1 41 x C O J a y � w ro Q W U Sr [a � D Luarms - 0107 199'7 N >: 0, 0 -f E ° 4 2: t0 �? \ �4 1 ' •.i al W > a� c°v 1 > \ 41 to 41 ° U •rl 4 � 41 a) O 41 4 a41 O .a > E.. -4 i- 1 W (0 w -� I a) 1 N •� c O 1 } O N W J c •� 3 / a) i C E ji > y y J zri Q' J •.1 .-1 $4 a) O (n O 41 L Er (;j ff > -4 -4 O 4+ 44 G U al • f; 'v "" r � I J •J Luarms - 7 DIAGRAM 8 REINFORCED CONCRETE SAND FILTER CONTAINER 2' 4'I 4' 4' I 4' 2' Max. I Max. Max. l i Max. I Max. IMax. -. __ < . J lis" 0 (min) Pressure istributioi Pipe See I Diagram 9 11 Detail 1 11 C l i 12" 0 (Mir Pressure 0107 1998 2" A (Min) Pressure Transport Pipe .,l r o" (Min) Reinforced Concrete Wall 4" 0 Solid Smooth Wallr{,,, 4" q1 Perforated Under -Drain Under -Drain to Disposal — Piping (Note 2) Trench NOTE: 1. Refer to_Diagram 9 for Section Details. 2. The Invert Elevation of the Perforated Under -Drain Piping Must Be at least twelve inches (12) above the Disposal Trench Filter Material. 3. A Thirty (30) Mil. (Minimum Thickness) PVC Sheet Membrane Liner or Other Material Approved by the Department May Be Used in Place of Concrete. Use of a Sand Filter Container is Required where there is Likelihood of Groundwater Infiltration. -:..evised '_/20/83 REINFORCED CONCRETE SAND FILTER CONTAINER - 4 7 Shaped Soil Backfill L' Min Overfill 25% to Shed Rainfall L''Min - G'�p< Ja p;' ovp00-� ' Ue ��0 VC7 0 0 0 000 Medium Sand. Z" Min • a c ' �-- (Discharge) 4" 0 Smooth Wall , Under -Drain to Disposal Trench 0107 1999 a � acs C? j o 0 vv� 00 ....Pressure:-*.".'. Transport :.... ' ' : •' Pipe' �J -'F 1ter� Material, ^ v Sand Leveling Base SECTION A -A E 1' min Filter Fabric —� r teinfcrced 1' Min - _ v Concreze ^1P'ressure d= ManifolFiltr eMaterial CC7C^,. _.J .. - -.-, = ^ - _ ' Container • 2' Kin :. _ .: : -Medium Sand . 1 - Filter Fabric— : • ' : - - Pressure i -.. , •• - �;.' ." " : - ... - Transport — } _ Pipe 6"'Min ^ 4" 0 Perforated Under -Drain Piping (Collection) j_ < P� .. < - •. , Water Stop 10. SECTIOU B -B Filter Fabric DETAIL 1 2' 2' 2' ?74 Max Max ! Max A o v o 0 (Min) Pressure Dist. Pip —.-" •J "-!in) ?-ensure '-lsnifold 4" Min Pressure Dist. Pipe 6" min Filter - - Pipe material "-dium Sand N N r1 U «� H ! � N E N .a t � y �'Na oo°a o ij I OCc I I n opeoC �-1 C0Doe W i E U + Co ato �m I I � I 1 r-1 U W C «� $4 •.-i N a40 ce $4 I ° i E O — I I � I 1 a40 ce I 4�p — C 0 •rl E E 04 �y O C � (� - onOWN a-° IZ - C4 3° W ,d W O 4 ' � � a O I 0�0 \ C 4j O o C 04 I N =p �O C N f2. N ��o o ma_. o �a a �- ro N u� o E4 a),\ CAN (� o or. ' o �^I U C O oo I {� E ►0`p C o0 t°A 00 � p0 ,� � a flO00 > N OO�c J .� —�— 1 rl \ W 1 I 3�ec oa a o H 1 t � � ,0 •.-I � o. JJ 1 ul f o i , N t Irl .-1 U N (D ras U ro �o C W \ ? I C W - -4 )4 \ _f •••1 Sa •-+ N ! 1 Effluent DIAGRAM 11 REDUNDANT SYSTEM Diversion Valve - 0107 2001 Disposal Field No. 2 Disposal Field No. 1 Header Pipe Header - - Disposal Trench Pipe -� Lateral Piping ' s . C d' I •.1 DIAGRAM 12 DISPOSAL TRENCH CROSS-SECTIONS Native Soil Back -".ill y���, Filter Material , Protection \{ 010'7 2002 f � 6" min. GRAVITY -FED 12" Min.; l TRENCH 36" Max. �G od��� 6" Min g Filter Material �! 24" Min. Native Soil Backf ill Filter Fabric 1� 6" M= or Equal. r PFWSSURIS::D 14"in:�; ..- �l� 2ter .. TRE<IC`i Material��..�., QC ' 36" Max Q `� 1> -, "^ �-� 1i12" 24in. 1 Pressurized 1 \ 1 �r D istributicn ,^ I 24" 'Ain. I ' Native Soil'- .l�/ 6" in. Backf ill GRAVE L-LEESS 104. Sidewall Seepage Area (Botts Sides) DIAGRAM 13 TYPICAL CURTAIN DRAIN Berm to e S 1 (Undisturbed Soil) 10' �c`,------- Trench Sidewall .er Layer That Limits__ :ia,erial Effective Soil Depth24 •' 010'7 2003 Soil /.. 1 ' - Filter Fabric or Othef Non -biodegrad- able Material Filter z 7, Material -F-- 12 Min. DIAGRAM 14 TYPICAL GRAY WATER WASTE DISPOSAL SUMP (Using Seepage Chamber) .Cedar or Equivalent 4 x 4See Detail A Was" 2 aftPosai 7 Detail A 0107 X004 1/4" Hardware Cloth Weld to Band 1-2"Bar " - , M 1A Grate 4J Concrete r- 4 -4 Slab 2-- concrete Slab Poured in Place Settling 181, Min. Chamber undisturbe Soil Concrete Lid ;DlFilter . . . . . . . . . . . Filter Material N Seepage Chamber A! Grouna Line Filter Fabric 0- '7aual Receiv ino g CO I,. - Chamber .1 I. D. 12"r*1 Min. aj !4j a n. (n -W {oc. a U14 7 Detail A 0107 X004 1/4" Hardware Cloth Weld to Band 1-2"Bar " - , M 1A Grate 4J Concrete r- 4 -4 Slab 2-- concrete Slab Poured in Place Settling 181, Min. Chamber undisturbe Soil Concrete Lid ;DlFilter . . . . . . . . . . . Filter Material N Seepage Chamber A! Grouna Line Filter Fabric 0- '7aual Sink Wssts Ditp�l DIAGRAM 15 TYPICAL GREY WATER WASTE DISPOSAL SUMP (Using Disposal Trench) Filter Fabric or Equal 0167 2005 s overfill allow for Settlement ri j ✓E 8 VV 2„ Bar o c S Grate Concrete- im £ Slab 18" Min. Settling Chamber )IAGR MS- L c Disposal Trench DIAGRAM 16 t A.0 � � a i Uo. /c wire 10P.yinI/IG W �± Lid Filter Material 1-- 3000 /b. G.,rr�cre�st ve ma. 10 wf* �3C.'�on7 cx7G^et2 141a i 3h �' z� a 1 C ❑ GTS Q t;01'_i ;., �'*: i a 0 ❑❑ C3" G Q a Vii:?, c a ar>t 76 or //4 .veea •Ja/d der Diner• 2x 2 inside ami 2 X6 cu=lce CROSS SECTC1V Ol6'7 2006 0 Effluent Sewer or ..Building Sewer T.,•.c aaaau 1 12.1 aA �. , c f T a o .ac J t 7 a a Ca 4 c t t J •� t : .� 21 � Y Cespool or Seepage Pit ^R` -CAST CONCRETE LINER CETAILS :. _0/S3 ) 1,7, G R11f•1S -'_ 9 Imp--- tian Fort -7.,- 75-17,k 6ffluerA4, sewer ReaderApe, 0107 2007 6" Min. Separation Between Pit Wall and Pit Ring Filter Material YPICAL 70PVIEW PARALLEL SEEPAGE P17 S �� , I i L Filter ala. --Yc -//)C ground -acer Material 7 "Weader Pit" Pere Sepj7e tW7K) Refer to Diaaram 16 -Concrete for Pre -Cast Liner Details � A in L Filter ala. --Yc -//)C ground -acer Material 7 IDEALIZED CROSS-SECTION OF ESCARPM&IT (without a Layer That Limits Effective Soil Depth) 0107 2008 ge tem DIAGRAM 19 IDEALIZED CROSS SECTION OF ESCARPMENT (With a Layer That Limits Effective Soil Depth) 010'7 2009 72" or Greater Greater Than 50 Percent Slope 50' Min. On -Site Sewage Disposal System Layer That Limits Effective Soil Depth l DIAGRAM 20 IDEALIZED CROSS SECTION OF A SOIL COLUMN 0107 2010 f /'+,i •�.,rsw� sof,. : ' ,q it .Se:�t��f'�•��`�J '� - •'Zone of Aeration "fit "� '-^�-' Temporarj Nater Table Temporary Groundwater layer that 1 its -Soil Depth. _ef_f ��° A •J :•'u May or may not be Preset : • :a. Unsaturated Zone Water Table Saturated Zone . • � • ' Bedrock w Ti�.:r� .: ,. • i I: G RAi•IS - 0 DIAGRAM 21 IDEALIZED ILLUSTRATION OF UNSTABLE LANDFORMS Process Definition and Characteristics Rock fall The rapid descent of a rock mass, vert - and ically from a cliff or by leaps down a debris fall slope. The chief means by which taluses are maintained. Rocks l i de The rapid, sliding descent of a rock ' and I mass down a slope. Commonly forms i debris sl ide I `reaps and confused, i rregui•ar masses or i ruob le. I i i i 1 Slump I The downward slipping of a conerent body I of rock or regolith along a curved sur - ace of the slumped mass, and any flat - lying planes in it, become rotated as i they slide downward. The movement creates) a sharp facing downslope. I Debris =low I Variety: Mudflow The raoid downslope plastic flow of a mass of debris. Ccmmoniv forms an apron -like or tongue -like area, with a very irregular surface. In some cases, begins with slump at head, and con- centric ridges and transverse furrows in surface of the tonguelike part. 1 debris flow in which the consistency )f the substance is that of mud; general- ly contains a large proportion of fine )articles, and a large amount of Nater. 0107 2011 Illustration IDEALIZED CROSS SECTION Of\UNSTABLE LANDFORM Headwall SO' Kin. / -••� -rte ' Slump Toe on -Site Sewage Disposal Svstem 0107 2012 . 50' Kin. r I M On-site Sewace Disposal Svstem; Unstable Landform DIAGRAM 23 0107 2013 IDEALIZED CROSS SECTION OF UNSTABLE LANDFORM Trees Appear Tilted. Tree Trunks Bend Uniformly .as They Enter the Ground. 411 Telephone Poles Appear Tilted Fences Acnear „ : Tilted or tea• .�. �• � Nei - Displaced )IAC AMS DEPARTMENT OF ENVIRORMCAL QUALITY Water Quality Program SSRULE.3 (9-16-66) 72-1 On -Site Sewage Disposal DIVISION 72 ®107 2014 FEE SCHEDULES 340-72-070 MULTNOMAH COUNTY FEE SCHEDULE (1) Septic Tank and Disposal Fields: (a) New site evaluation, 1st lot . . . . . . . . . $120.00 (b) Each additional lot evaluation while on site . . . . . . . . . . . . . . . . . . . . $120.00 (2) Seepage Pits, Cesspools or Holding Tanks (New Site Evaluation) (a) Commercial site . . . . . . . . . . . . . . . . $120.00 (b) Industrial site . . . . . . . . . . . . . . . . $120.00 (c) (A) Multiple residential site, 1st system . . . . . $ 70.00- 0.00(B) (B)Each additional system . . . . . . . . . . . . . $ 50.00 (d) Single family residential site . . . . . . . . . $ 70.00 (3) Construction Installation Permit: (a) Standard septic tank/drainfield, with daily flow of 450 gallons per day maximum . . . . . . . . . . . . . . . . . $ 65.00 (b) Septic tank capping fill on disposal area . . . . . . . . . . . . . . . . . . . . . $ 75.00 (c) Sand filter system . . . . . . . ... . . . . . . . $100.00 (d) Septic tank/drainfield system in excess of 450 gallons per day . . . . . . . . . . . . . . . $ 65.00 Plus $20.00 for -each increment of 450 gal/day (e) Septic tank/drainfield lift pump system . . . . . . . . . . . . . . . . . . . . . . $ 85.00 (f) All alternative systems other than . capping fill and sand filter systemg . . . . . . . $100.00 (g) Cesspool . . . . . . . . . . . . . . . . . . . . . $ 65.00 SSRULE.3 (9-16-66) 72-1 On -Site Sewage Disposal DEPARTMENT OF ENVIROHIMENTAL QUALITY Water Quality Program 010'7 2015 (h) Cesspool excess of 20' of rings . . . . . $100.00 (i) Septic tank (maximum capacity 2500 gallons) and one 15' or 20' seepage pit . . . . . . . . . . . . . . . . . . . . . . . . $ 65.00 (j) Septic tank (maximum capacity 2500 gallons) and two 15' x 20' seepage pits . . . . . . . . . . . . . . . . . . . . . . . $100.00 (k) System with septic tank larger than 3000 gallons shall be prorated at increments of $50.00/1000 gallon capacity. $50.00 for each increment of 1000 gallons of capacity . . . . . . . . . . . $100.00 (1) Holding tank permits . . . . . . . . . . . . . $iOG.00 (4) Replacement of Cesspool . . . . . . . . . . . . . . . . $ 65.00 (5) Alteration of septic tank and drainfield . . . . . . . $ 40.00 (6) Extension of septic tank and drainfield . . . . . . . . $ 40.00 (7) Repair of septic tank and drainfield . . . . . . . . . $ 40.00 (8) Repair of Septic tank/drainfield with lift . . . . $ 55.00 pump . . . . . . . . . . . . . . . . . . . . . (9) (a) Inspection of sewage disposal pump truck $ 25.00 (b) Each additional licensed truck on premises premises . . . . . . . . . . . . . . . . . $ 10.00 (10) Evaluation of existing system adequacy . . . . $ 30.00 (11) Annual evaluation of alternative system . . . . $ 40.00 (When required including holding tank) (12) Annual evaluation of temporary mobile homes $ 25.00 (13) Abandonment of subsurface system . . . . . . . $ 35.00 (14) Any person commencing work without having first been issued a permit, as required in section 340-71-160(1), if subsequently permitted to obtain a permit, shall pay double the fee established in this rule. 3SRULE.3 9-16-36 72-2 Ozr-Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program . ' 0107 4016 340-72-080 JACKSON COUNTY FEE SCHEDULE , ON-SITE SEWAGE DISPOSAL SYSTEMS (1) New Site Evaluation: (a) Single Family Dwelling: (A) First Lot . . . . . . . . . . . . . $175 (B) Each Additional Lot Evaluated During Initial visit . . . . . . . . . . . . . . . . . . . $160 (b) Commercial Facility System: (A) For First 1,000 Gallons Projected Daily Sewage Flow . . . . . . . . . . . . . . . . . . . . $175 (B) Plus For Each 500 Gallons or Part Thereof Above 1,000 Gallons . . . . . . . . . . . . . $ 40 (2) Preliminary Site Inspection . . . . . . . . . . . . . $ 75 This fee will be credited to the site evaluation fee if application for a site evaluation on the same property is made within 90 days. (3) Construction Installation Permit: (a) For First 1.000 Gallons Projected Daily Sewage Flow: (A) Standard On -Site System . . . . . . . . . . . $ 80 (B) Alternative System: Aerobic System . . . . . . . . . . . . . . . . $130 Capping Fill . . . . . . . . . . . . . . . . . $130 Evapotranspiration -Absorption . . . . . . . . $130 Gray Water Waste Disposal Sump . . . . . . . . $ 80 Holding Tank . . . . . . . . . . . . . . . . . $100 Pressure Distribution . . . . . . . . . . . . . $130 Redundant . . . . . . . . . . . . . . . . . . $110 Sand Filter . . . . . . . . . . . . ... . . $150 Seepage Trench . . . . . . . . . . . . . . . . $ SO Steep Slope . . . . . . . . . . . . . . . . . $ 80 Tile Dewatering ... . . . . . . . . . . . $130 (b) For systems with projected daily sewage flows greater than 1,000 gallons, the construction installation permit fee shall be equal to the fee required in subsection (3)(a) of SSRUL?..3 (9-16-86) 72-3 On -Site Sewage Disposal 0107 2017 DEPARITENT OF ENVIRONKENTAL QUALITY Water Quality Program this rule, plus $10 for each 500 gallons or part thereof above 1.000 gallons. NOTE: Fees for construction permits for systems with projected daily sewage flaws greater than 5,000 gallons shall be in accordance with the fee schedule for WPCF permits. (c) Construction -Installation Permit Renewal: (A) If Field Visit Required . . . . . . . . . . . $ 50 (B) No Field Visit Required . . . . . . . . . . . . $ 10 NOTE: Renewal of a permit may be granted to the original permittee if an applica- tion for permit renewal is filed prior to the original permit expiration date. (4) Alteration Permit . . . . . . . . . . . . . . . . . . . . $ 50 (5) Repair Permit: (a) Single Family Dwelling . . . . . . . . . . . . . . . $ 40 (b) Commercial Facility . . . The appropriate fee identified in subsections (3)(a) and (b) of this rule apply- (6) pply. (6) Authorization Notice: (a) If Field Visit Required . . . . . . . . . . . . . . $ 40 (b) No Field Visit Required . . . . . . . . . . . . . . $ 0 (7) Annual Evaluation of Alternative System (Where Required) . . . . . . . . . . . . . . . . . . $ 25 (S) Annual Evaluation of Large System (2,501 to 5.000 GPD) $ 50 (9) Annual Evaluation of Temporary Mobile Home . . . . . . . . $ 25 (10) Rural Area Variance to Standard Subsurface Rules: t (a) Site Evaluation . . . . . . . . . . . . . . . . . . . $175 NOTE: In the event there is on file a site evaluation report for that parcel that is less than ninety days old, the site evaluation fee shall be waived. SSRULE.3 (9-16-86) 12-4 On -Site Sewage Disvosai DEPARTMENT OF ENVIRODIlENTAL QUALITY Water Quality Program . 0107 2018 (b) Construction Installation Permit The appropriate fee identified in Section (3) of this rule applies. (11) Sewage Disposal Service: Pumper Truck Inspection. Each Business Licensed . . . . . $ 25 SSRUL3.3 (9-16-66) 72-5 Oa -Site Sewage Disposal DEPARI4CNT OF ENVIRONKMITAL QIIALITY Water Quality.Program 340-72-090 LIMN COU=Y SEE scgEDULE. 0107 2019 Linn County 340-72-090 Linn County is authorized to establish fees for permits to repair failing on --site sewage disposal systems in amounts not to exceed the following: (1) System serving a single family dwelling $163. (2) System serving a commercial facility . . . The appropriate fee identified in OAR 340-71-140 (1) (b) (A) and (B) . SSRULZ-.3 (9-16-86) 72-5 On -Site Savage Disposal DEPARTMENT OF ENVIRODIIU;NTAL QUALITY Water Quality Program 340-73-025 SEPTIC TANK CONSTRUCTION. 0107 2020, The following requirements shall arply to all septic tanks manufactured for use in Oregon unless specifically exempted by other portions of these rules: (1) Compartments: Septic tanks shall have single or multiple compartments. Multiple compartment tanks shall comply with the f oll owing: (a) The first compartment shall have a minimum liquid capacity of at least two-thirds (2/3) of the total required liquid capacity, as measured from the invert of the outlet fitting. (b) The second and succeeding compartments shall each have a minimum liquid capacity equal to or greater than one -calf (1/2) of the liquid capacity of the first compartment. (c) Each compartment shall have access provided by a manhole having not less than eighteen (18) inches across its shortest dimension unless otherwise approved by the Department. The manhole cover shall not weigh more than seventy-five (75) pounds. (d) No compartment shall have an inside horizontal dimension of less than twenty-four (24) inches. (2) Liquid Depth: The liquid depth.of any compartment shall be at least thirty (3.0) inches. Liquid depths greater than seventy-two (72) inches,.shall not be considered in determining the working liquid capacity. (3) Septic tanks shall be watertight. (4) Septic tanks shall be capable of supporting an earth load of at least three hundred (300) pounds per square foot when the maximum coverage does not exceed three (3) feet. Tanks installed with more than three (3) feet of cover shall be reinforced to support the additional load. (5) The inlet and outlet fittings shall be of cast iron, Schedule 40 P.V.C. plastic. Schedule 40 ABS plastic, or other materials approved by the Department, with a minimum diameter of four (4) inches: (a) The distance between -the inlet and outlet fittings shall be equal to; or greater than, the liquid depth of the tank. SSRULE.3 (9-16-36) 73-1 0; -Site Sewage Disposal' DEPARTMENT OF ENVIRODIIMM QUALITY Water Quality Program 010'7 2021 (b) The inlet and outlet fittings shall be located at opposite ends of the tank. They shall be attached in a watertight manner approved by the Department. (c) The inlet fitting shall be a "sanitary tee"'extending at least six (6) inches above and below the liquid level. (d) The outlet fitting shall -be a "tee" extending below liquid level a distance equal to not less than thirty-five (35) percent nor greater then fifty (50) percent of the liquid depth, and at least six (6) inches above the liquid depth in order to provide scum storage. When the tank is used as a holding tank, the outlet fitting shall be provided with a watertight plug. (e) Ventilation shall be provided through the fittings by means of a two (2) inch minimum space between the underside of the top of the tank and the top of the "tee" fitting. (f) The invert of the inlet fitting shall be not less than one (1) inch and preferably three (3) inches above the invert of the outlet fitting. (g) The septic tank manufacturer shall provide with each fitting a rubber or neoprene rubber gasket meeting ASTM Specification C-564, or an appropriate coupler which the Department determines will provide a watertight connection between the fittings and the building and effluent sewer pipes. (h) An access cover of not less than six (6) inches across shall be provided above each fitting. (6) At least ten (10) percent of the inside volume of the tank shall be above liquid level to provide scum storage. (7) In tanks with more than one (1) compartment, a four (4) inch diameter (minimum) "tee" fitting shall be placed in each common compartment wall, using the same specifications as required for the outlet fitting. The invert of this "tee" fitting shall be at the same elevation as the outlet "tee." (8) Septic tanks shall be constructed of concrete, not less than twelve (12) gauge or thicker steel, or other materials approved by the Department:. (a) Steel tanks shall be coated inside and out with asphalt or other protective coatings, meeting the most current American National Standards Institute UL 70 standard, Sections 25 SSMME.3 (9-16-86) 73-2 On -Site Sewage Disposal DEPARTMENT OF ENQIRONiKENTAL QUALITY Water Quality Program through 43, or other coatings of equal or better performance approved by the Department. �0�2 � (b) Precast concrete tanks shall have a mini.mum'wall.10'7 compartment, and bottom thickness of two and one-half (2 1/2) inches, and shall be adequately reinforced. The top shall be at least four (4) inches thick. (c) Where concrete block tanks are permitted by the Agent, the tanks shall be constructed of heavyweight concrete block, eight (8) inch minimum thickness, laid on a six (6) inch (minimum) poured foundation slab. The mortared joints shall be well filled. All block holes or cells shall be filled with mortar or concrete. "k" webbing shall be installed at every third row of block. Number three (3) re -bar shall be installed vertically in every block. Tank interiors shall be surfaced with at least two (2) one-quarter (1/4) inch thick coats of corrosion resistant water -proof sealant. The first row of blocks shall be keyed or doweled to the concrete foundation. (d) Cast -in-place concrete tanks shall be constructed using the minimum sidewall thickness, bottom thickness, top thickness, and reinforcing shown in Diagram 1. All other requirements contained herein shall also be met. A structural permit is required from the Department of Commerce or the municipality with jurisdiction as defined in ORS 456.750(5). (See Diagram 1.) (e) For cast -in-place septic tanks with dimensions different from those shown in Diagram 1, or when the septic tank is to be located under a road or driveway, two (2) copies of detailed plans and specifications, prepared by a registered professional engineer licensed to practice in Oregon shall be provided to the Agent for review and approval. (9) All prefabricated septic tanks shall be marked on the uppermost tank surface with the liquid capacity of the tank and either the manufacturers full business name or the number assigned by the Department. (10) Each commercial;manufacturer of prefabricated septic tanks shall provide two (2),complete sets -of plans and specifications, prepared by a registered professional engineer licensed to practice in Oregon, to the Department for review and approval. (11) Each commercial manufacturer of prefabricated septic tanks shall provide the Department with written certification that septic tanks for use in on-site sewage disposal systems in the State of Oregon will comply with all requirements of this Rule. SSRDLB.3 9-16-86 73-3 On -Site Sewage Disposal ' DEPARTMDIT OF MWIRON O:NTAL QII�Ty Water Quality Program :tou 1. Kix shall 5e at least 5 1/2 sacks crmeat ler Cubic Yard. ill _. Kis shat : be vssraud or ta=POd all. acids. :ret �� :. Work shall be cantisuc'uslY :!Or seven days after PlAce mnc. A" rS=forc:.a4 steel =acs shal.1 be centered :a raspec-.:Ve slabs and aal:s- S. �aiator-:a4 steel shall he LM -ed 17. =rhes ..i^,m at &jl cc=&= and splices- ;. gar shat; be cold -bent jtth not less than. a : 1/4 inch radius. %Q. ! Rob"ac i• O.C. ..eY f—..•r at C"c" 1 \ .t sl•s c J�.ciac� I Lul.c ota►crJU4 1 (340-73-025 Te„ L C 010'7 2023 TYPICAL C.aST-M-,STCNG�E'S= S '^ZC _ I1C 5?_+r'= �T:C.f5 _ lam wig .111C vie Cel C cityI =aci_7 I Cepth ccrbic (gaucsisl I feet) j i v •'° 9 -. 7 - 4 l e A .moi 1i y 03 Cj- I I ' I �1 J0011017 I L'6 i ! 4'-3• ; 9' 18' I---------------------- 5' yf 5f-11'" 4'-1" . i IL001 Lt73 I I GO:. I I f •� f w 3w. ? w j•w :tou 1. Kix shall 5e at least 5 1/2 sacks crmeat ler Cubic Yard. ill _. Kis shat : be vssraud or ta=POd all. acids. :ret �� :. Work shall be cantisuc'uslY :!Or seven days after PlAce mnc. A" rS=forc:.a4 steel =acs shal.1 be centered :a raspec-.:Ve slabs and aal:s- S. �aiator-:a4 steel shall he LM -ed 17. =rhes ..i^,m at &jl cc=&= and splices- ;. gar shat; be cold -bent jtth not less than. a : 1/4 inch radius. %Q. ! Rob"ac i• O.C. ..eY f—..•r at C"c" 1 \ .t sl•s c cwi s.+•a � I J'- I iawa C,CYI ; Sa•acac► .. w � ' S L - -oL rR'1 s 3SRUL-.3 (9-16—a6) 73-4 on -Site Sewage Disposal J�.ciac� I Lul.c wen•• - acC..a wa�•t. — cwi s.+•a � I J'- I iawa C,CYI ; Sa•acac► .. w � ' S L - -oL rR'1 s 3SRUL-.3 (9-16—a6) 73-4 on -Site Sewage Disposal DEPARTMENT OF ENVIRONKENTAL QUALITY Water Quality Program 340-73-030 DOSING SEPTIC TANK ASSEMLIES. ®107 2024 (1) Introduction: A dosing septic tank combines the functions of a septic tank and dosing tank into one unitized assembly by.withdrawing septic tank effluent with a pump or dosing siphon from the clear zone at the outlet end of the tank. These may be considered by the Department for equipment approval for installations where the design flow does not exceed 450 gallons per day. (2) Structural: Dosing septic tanks shall comply with applicable standards for septic tanks and for dosing tanks. Each tank shall be water tested by filling to the soffit for a period of one hour. During the test there shall be no measurable drop in water level, and no visible leakage. Each tank shall be certified watertight. (3) Configuration: (a) A typical design is shown in Diagram 2- (b) The minimum total volume of the tank shall be 1,100 gallons. (c) The minimum submerged volume at the lowest operating liquid level shall be 900 gallons. (d) Unless otherwise authorized by the Department, liquid levels shall be controlled so that twenty (20) percent of the projected daily sewage flow is discharged each cycle. (e) The invert of the inlet tee shall be not less than one inch above the high operating liquid level. (f) Ports, or holes provided in a vault or outlet device shall be located to withdraw effluent horizontally at an elevation measured from the inside bottom of the tank of 65 to 75 percent of the lowest operating liquid depth. The net area of the ports shall be not less than 20 square inches. (g) A convenient means of monitoring sludge and scum accumulation shall be provided, with access extending to ground level.: (4) Features: (a) Design and equipment shalf emphasize ease of maintenance and longevity and reliability of components, and shall be proven SSRULE.3 (9-16-86) 73-5 On -Site Sewage Disposal- DEPAMENT OF ENVIRONMENTAL QUALITY Water Quality Program suitable by opreational experience, test, or anal y s suitable to the Department. % _07 2025 (b) An easy means of electrical and plumbing disconnect shall be provided. preventing the need for a repairman to be more than briefly exposed to the sewerage atmosphere. (c) Component materials shall be durable and corrosion resistant such as Type 316 stainless steel, suitable plastics. or 85-5-5-5 bronze. (5) Approvals: Each commercial manufacturer of prefabricated dosing septic tanks shall provide two (2) complete sets of plans and specifications, prepared by a registered professional engineer licensed to practice in Oregon, to the Department for review and approval. Each manufacturer must also provide written certification to the Department that such assemblies distributed for use in onsite sewage disposal systems in Oregon will comply with all requirements of this Rule. SSRULE.3 (9-16-36) 73-6 On—Site Sewage Disposal DEPARTMENT OF MWERORMCAL QUALITY Water Quality Program DIAGRAM 2 (340-73-0$0 (3)) TYPICAL DOSING TANK PUN 01up" 7 2®26 l., Ac= -'ss -or siudce and s cim onitor'n. s =cr:3 in irnm_:n { Sc�T1C1V' DIAGRAMS �SBIII.-.1 �?—ib-36 73— J�i Sita Sewage Jisnosz -DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-73-035, DISTRIBUTION BOXES.0107 Z®spry (1) Distribution Boxes shall be constructed of concrete, fiberglass. �'GGrr// or'other materials acceptable to the Department. (2) Distribution boxes shall be watertight, and designed to accommodate the necessary distribution laterals. (See Diagram 3 for detail.) The top, walls. and bottom of concrete distribution boxes shall be at least one and one—half (1 1/2) inches thick. (3) The invert elevation of all outlets shall be the same, and shall be at least two (2) inches below the inlet invert. (4) Each distribution box shall be provided with *a sump extending at least two (2) inches below the invert of the outlets. (5) The minimum inside horizontal dimension measured at the bottom shall be eight (8) inches, with a minimum bottom inside surface area of one hundred sixty (160) square inches. The bottom outside surface area shall be equal to or greater than the top outside surface area. (6) Distribution box covers shall be marked with the manufacturer's full business name, or number assigned by the Department. (7) Each manufacturer shall provide the Department with complete, detailed plans and specifications of the distribution box, and shall certify. in writing. that distribution boxes manufactured for use in on—site sewage systems in Oregon will comply with all requirements of this Rule. SSRULE.3 (9-16-86) 73-8 On -Site Sewage Disposal ' DEPAR=IENT OF ENQIRONHENTAL QUALITY Water Quality Program 340-73-040 DROP BOXES. 0107 2028 (1) Drop boxes shall be constructed of concrete, fiberglass, or other materials acceptable to the Department. (2) Drop boxes -shall be watertight, and designed to accommodate the necessary piping. (See Diagram 3 for detail.) The top, walls, and bottom of concrete drop boxes shall be at least one and one- half (1 1/2) inches thick. (3) The inverts of the inlet and overflow port shall be at the same elevation. The invert of the header pipe port(s) leading to the disposal trench(es) shall be six (6) inches below the inlet invert. (4) Drop box covers shall be marked with the manufacturer's full business name, or number assigned .by the Department. (5) Each manufacturer shall provide the Department with complete, detailed plans and specifications of the drop box, and shall certify, in writing, that drop boxes manufactured for use in on- site sewage disposal systems in Oregon will comply will all requirements of this Rule. SSP=.3 (9-16-66) 73-9 On -Site Sewage Disposal QUALITY Wates Quality Program DzPARMMT OF ENVIRONMENTAL a. 0107 2029 OIAGPAM 3 PRE- AST CONCRETE DISTRIBUTION BOX DETAIL (OAR 340-73-035) 1 1/2* Effluent Header Sewer inlet - - - - - - I Header Outlet p r za:, w I- — "u Pipe LL 2- =arth Stable Level Base (Undisturbed Earth or Bedded In Sand) PRE -CAST COZICVZ".m- DROP BOX DETAIL (OAR 340-73-040) 'sight Tjcht Joint CdV— Outlar Ituat Header p4 pe 14- V eon I Stable Lava Bass (Undisturbed Earth or Bedded in Sand) 3 -DIAGRAMS -'9-16-10 -1-10 om-iita Savage Disacea, DEPARTMENT OF ENVIRONMENTAL QII4ITY Water Quality Program 340-73-041 FILTER FABRIC 0107 2030 Filter Fabric 340-73-041 Except as otherwise allowed by the Department on a case-by-case basis, filter fabric used within on-site systems in Oregon shall meet the following specifications: (1) Material synthetic fabric, either spunbonded or woven. (2) Burst Strength, psi — not less than 25 psi. (3) Air Permeability, cfm per sq. ft. — not less than 500. (4) Water Flow Rate — not less than 500 gpm per sq. ft. at 3 inches of head. (5) Surface Reaction to Water — Hydrophilic. (6) Equivalent Opening Size — 70 to 100 sieve. (7) Chemical Properties: (a) Nov -biodegradable. (b) Resistant to acids and alkalies within a pH range of 4 to 10. (c) Resistant to common solvents. SS8IIL8.3 (9-16-86) 73-11 Oa -Site Sevage Disposal DEPARIENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-73-045 DIVERSION VALVES. 0107 2031 (1) Diversion valves shall be constructed of durable material and be of a design approved by the Department. They shall be corrosion - resistant, watertight, and designed to accomodate the inlet and outlet pipes. (2) The manufacturer's name or number assigned by the Department shall be marked on the cover. (3) Each manufacturer shall provide the Department with complete, detailed plans and specifications of the diversion valve, and shall certify, in writing, that diversion valves manufacuted for use in on-site sewage disposal systems in Oregon will comply with all requirements of this Rule. SSRULE.3 (9-16-86) 73-12 Oa -Site Sewage Disposal DEPARTMENT OF ENPIROD4IENTAL QIIALITY Water Quality Program 340-73-050 DOSING TANK CONSTRUCTION. 010" ��2 (1) Dosing tanks used in on-site sewage disposal systems in Oregon shall be watertight. They may be constructed of concrete, fiberglass, or other noncorrosive materials approved by the Department: (a) Fiberglass dosing tanks shall be a minimum three sixteenths (3/16) inch thick and constructed with a glass fiber content of 40 percent and a resin content of 60 percent, with no exposed non -resin -covered glass fibers. (b) Precast concrete dosing tanks shall have a minimum wall and bottom thickness of two and one-half (2 1/2) inches. The top shall be not less than four (4) inches thick. There shall be no seams in the walls or bottom. (c) Cast -in-place concrete dosing tanks shall have a minimum wall, top, and bottom thickness of six (6) inches when the liquid capacity is twelve hundred (1200) gallons or less. A structural permit from the Department of Commerce or the municipality with jurisdiction (as defined in ORS 456.750(5)) is required when cast -in-place concrete dosing tanks are used. Cast -in-place concrete dosing tanks with a liquid capacity greater than twelve hundred (1200) gallons shall require sub mit tal of detailed plans and specifications, prepared by a registered professional engineer licensed to practice in Oregon. (2) Each dosing tank shall be constructed and reinforced to withstand the loads imposed upon the top, walls and bottom. (3) Each dosing tank employing one (1) or more pumps shall have a minimum liquid capacity equal to the projected daily sewage flcw for flcws up to twelve hundred (1200) gallons per day. The Department may use its discretion in sizing dosing tanks when the projected daily sewage flcw is greater than twelve hundred (1200) gallons per day. The liquid capacity shall be as measured from the invert elevation of the inlet fitting. (4) The inlet fitting shall be of hubbed cast iron soil pipe or other materials approved by the Department, with a minimum diameter of four (4) inches. The dosing tank manufacturer shall supply a rubber or neoprene rubber compression gasket meeting the minimum requirements of ASTM specification C-564 with each fitting, or an appropriate coupler which the Department determines will provide for a watertight connection. (5) Each dosing tank proposed to serve a commercial facility with a maximum projected daily sewage flcw of twenty-five (2500) gallons, or proposed to serve a single family dwelling, shall be provided with an SSRULE.3 (9-16-86) 73-13 On -Site Sewage Disposal. DEPARTMENT OF EN71RONMENTAL QUALITY Water Quality Program access manhole and a manhole cover, both having a minimum 0107 2A33 horizontal measurement of eighteen (18) inches. (6) Each dosing tank proposed to serve a commercial facility with a projected daily sewage flow greater than twenty-five (2500) gallons or when containing more than one (1) pump or siphon shall be provided with a manhole access that conforms to the following minimum horizontal dimensions: (a) Opening at tank soffit—thirty (30) inches; (b) Inside of manway—forty-two (42) inches; (c) Manhole cover opening—twenty-three (23) inches. (7) Each prefabricated dosing tank shall be marked on the uppermost surface with the liquid capacity and the manufacturer's full business name or number assigned by the Department. (8) Each commerical manufacturer of prefabricated dosing tanks shall provide two (2) complete sets of plans and specifications, prepared by a registered professional engineer, licensed to practice in Oregon. to the Department for review and approval. Each manufacturer must also provide written certification to the Department that such tanks distributed for use in on-site sewage disposal systems in Oregon will comply with all requirements of this Rule. (9) Dosing tanks with siphons shall be designed and sized for each specific project and shall allow sufficient clearance above the siphon dome to allow removal of the dome. 1 SSRULE.3 (9-16-86) 73-14 On -Site Sewage Disposal DEPAR=V= OF ENVIRONMENTAL QUALITY Water Quality Program 010'7 2,034 340-73-055 EFFLUENT PUMPS, CONTROLS &'ALARMS, AND DOSING SIPHONS. (1) Pumps, Controls, and Alarms: Electrical components used in on- site sewage disposal systems shall comply with State of Oregon Electrical Code, and the following provisions: (a) Motors shall be continuous—duty, with overload protection. (b) Pumps shall have durable impellers of bronze, cast iron, or other materials approved by the Department. (c) Submersible pumps shall be provided with an easy, readily accessible means of electrical and plumbing disconnect, and a noncorrosive lifting device as a means of removal for servicing. (d) Except where specifically authorized in writing by the Director, the pump shall be placed within a corrosion- resistant screen that extends above the maximum effluent level within the pump chamber. The screen shall have at least twelve (12) square feet of surface area, with one— eighth (1/8) inch openings. The use of a screen is not required if the pump does not discharge into a pressurized distribution system, and the pump has a nonclog impeller capable of passing a 3/4 inch diameter solid sphere. (e) Pumps shall be automatically controlled by sealed mercury float switches with a minimum mercury tube rating of twelve (12) amps at one hundred fifteen (115) volts A.C. or by a Department approved equivalently reliable switching mechanism. The switches shall be installed so that approximately twenty (20) percent of the projected daily sewage flow is discharged each cycle. (f) An audible and visual high water level alarm with manual silence switch shall be located in or near the building served by the pump. The audible alarm only may be user cancelable. The switching mechanism controlling the high water level alarm shall be located so that at time of activation the dosing tank has at least one—third (1/3) of its capacity remaining for effluent storage. (g) When a system has more than one (1) pump, the Department may require they be wired into the electrical control panel to function alternately after each pumping cycle. If either pump should fail the other pump will continue to function. while an audible (user cancelable) and visual ala = (not user cancelable) indicating pump malfunction will activate. A cycle counter shall be installed in the electrical control panel for each pump. SSRULE.3 (9-16-66) 73-15 On—Site Sewage Disposal 010' 2035 DEPARTMM OF ENV RONKMAL QUALITY pater Quality Program (2) Dosing Siphons. Dosing s4_Yhons used in ocr-site sewage disposal systems shall comply with all of the following minimum requirements (a) Shall be constructed of corrosionresistant materials. (b) Shall be installed in accordance with the -manufacturer's recommendations. 3SRDLE.'. (9 -i6 -6) -?6 7a -Site Sewage Disposal DEPARM4M OF ENVIROnmzNTAL QUALITY Water Quality Program, 340-73-060 p1p% MATERIALS AICD CONSTRUCTION. 0107 2036 (1) Effluent C,.wer Pipe: The effluent sewer shall be constructed with materials in conformance to building sewer standards, as identified in the Oregon State Plumbing Laws and Administrative Rules. The effluent sewer pipe shall have a minimum diameter of three (3) inches. (2) Distribution and Header Pipe and Fittings: (a) Plastic Pipe and Fittings: (A) Styrene -rubber plastic distribution and header pipe and fittings shall meet the most current ASTM (American Society for Testing and Materials) Specification D 2852 and Sections 5.5 and 7.8 of Commercial Standard 228, published by the U.S. Department of Commerce. Pipe and fittings shall also pass a deflection test withstanding three hundred -fifty (350) pounds/foot without cracking by using the method found in ASTM 2412. In addition to the markings required by ASTM 2852, each manufacturer of styrene -rubber plastic pipe shall certify, in writing to the Department. that the pipe to be distributed for use in absorption facilities within the State of Oregon will comply with all requirements of this section. (B) Polyethylene distribution pipe in ten (10) foot lengths and header pipe in lengths of ten (10) feet or greater of which pipe and fitting shall meet the current ASTM Specification F405. Pipe and fittings shall also pass a deflection test withstanding three hundred -fifty (350) pounds per foot without cracking or collapsing by using the method found in ASTM 2412. Pipe used in absorption facilities shall be heavy duty. In addition to the markings required by ASTM F405. each manufacturer of polyethylene pipe shall certify, in writing to the Department that the pipe to be distributed for use in absorption facilities within the State of Oregon will comply with all requirements of this section. (C) Polyvinyl chloride (PVC) distribution and header pipe and fittings shall meet the most current ASTM Specification D-2729. Pipe and fittings shall pass a deflection test withstanding three hundred -fifty (350). pounds per foot without cracking or collapsing by using the method found in ASTM 2412. Markings shall meet SSRUL=.L k9-:6-86) '3-:7 O= -Site Barrage Disposal DEPARTMENT OF ENVIRAHI�NTAL IIALITY water,, �< &� UIU7 Z037 requirements established in ASTM Specification D-2729. subsections 9.1.1., 9.1.2 and 9.1.4. Each manufacturer of polyvinyl chloride pipe shall certify, in writing to the Department, that pipe and fittings to be distributed for use in absorption facilities within the State of Oregon will comply with all requirements of this section. (D) Polyethylene smooth wall distribution and header pipe (ten (10) foot lengths) and fittings shall meet the most current ASTM specification F 810. Pipe and fittings shall also pass a deflection test of three hundred fifty (350) pounds per foot without cracking or collapsing by - using the method found in ASTM 2412. Markings shall meet the requirements established in ASTM specification F 810. Section 9. Each manufacturer of polyethylene smooth wall pipe shall certify, in writing to the Department that the pipe to be distributed for use in absorption facilities within the State of Oregon will comply with all requirements of this Rule. (E) The four types of plastic pipe described above shall have two (2) rows of holes spaced one hundred -twenty (120) degrees apart and sixty (60) degrees on either side of a center line. For distribution pipe, a line of contrasting color shall be provided on the outside of the pipe along the line furthest away and parallel to the two (2) rows of perforations. Markings, consisting of durable ink, shall cover at least fifty (50) percent of the pipe. Markings may consist of a solid line, letters, or a combination of the two. Intervals between markings shall not exceed twelve (12). inches. The holes of each row shall be not more than five (5) inches on center and shall have a minimum diameter of one-half (1/2) inch. (b) Concrete tile in twelve (12) inch lengths shall meet the current ASTM Specification C 412. Each manufacturer of concrete the shall certify. in writing to the Department, that the pipe to be distributed for use in absorption facilities within the State of Oregon will comply with all of the requirements of this section. (c) Clay drain tile in twelve (12) inch lengths shall meet the current ASTM Specification C 4. Tile used as part of an . absorption facility shall bear the ASTM number above and some identification as to which quality standard it meets (Standard, Extra -Quality. Heavy -Duty). In addition to the markings required above. each manufacturer of clay tile SSRULE.3 (9-16-86) 73-18 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program shall certify. in writing to the Department, that the pipe to be distributed for use in absorption facilities within . the State of Oregon shall comply with all of the r� 2038 � Q requirements of this section. Q1 0 ( 2038 (d) Bituminized fiber solid pipe and fittings shall meet the current ASTM Specification D 1861. Perforated bituminized fiber pipe shall meet the cusent ASTM Specification D 2312. Each length of pipe and each fitting shall be marked with the nominal size, the manufacturer's name or trademark, or other symbol which clearly identifies the manufacturer and the appropriate ASTM specification number above. Markings on pipe shall be spaced at intervals not greater than two (2) feet. In addition to the markings required above, each manufacturer of bituminized pipe shall certify. in writing to the Department. that the pipe to be distributed for use in absorption facilities within the State of Oregon shall comply with all requirements of this section. In addition. all bituminized pipe that is to be installed as part of an absorption facility shall comply with the following requirements. The pipe shall have two rows of holes spaced one hundred -twenty (120) degrees apart and sixty (60 ) degrees on either side of a center line. For distribution pipe, a line of contrasting color shall be provided on the outside of the pipe along the line furthest away and parallel to the two (2) rows of perforations. Markings, consisting of durable ink, shall cover at least fifty (50) percent of the pipe. Markings may consist of a solid line, letters, or a combination of the two. Intervals between markings shall not exceed twelve (12) inches. The holes of each row shall not be more than five (5) inches on center and shall have a minimum diameter of one-half (1/2) inch. (e) Polyvinyl chloride (PVC) pressure transport pipe, pressure manifolds. and pressure lateral pipe and fittings shall meet the current requirements for Class 160 PVC 1120 pressure pipe as identified in ASTM Specification D-2241. The pipe and fittings shall marked be as required by ASTM Specification D-2241. (f) Gravel -less disposal trench systems shall be constructed using corrugated polyethylene pipe. fittings and couplings that comply with the requirements of ASTM F 667. The pipe shall have two rows of holes spaced approximately one hundred twenty (120) degrees apart, and approximately one hundred twenty (120) degrees apart each from the locaticn stripe which shall be a contrasting color. The drain holes shall be a minimum of one-half (1/2) inch diameter. The minimum outlet area shall be one (1) square inch per -lineal foot of pipe. There shall be at least one (1) drain hole SSRULE.3 (9-16-66) 73-19 Oa -Site Sewage Disposal 0107 2039 DEPARZMENT OF ENVIRONMITAL QUALITY Water Quality Program present in the valley of each corrugation. The gravel -less disposal trench pipe shall have a minimum inside diameter of ten (10) inches. and be encased in a factory -installed filter fabric wrap acceptable to the Department. Each manufacturer of this pipe shall certify in writing to the Department that the pipe and fittings to be distributed for use in absorption facilities within the State of Oregon will comply with all requirements of this subsection. SSR =.3 19-16-86) 73-20 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program NONWATER-CARRIED WASTE DISPOSAL FACILITIES, MATERIALS. AND CONSTRUCTION. 340-73-065 PRIMRTAB ES AND POLE TOILET SHELTERS. 0107 2040 (1) Privies and portable toilet shelters shall comply with the following general requirements: (a) Structures shall be free of hostile surface features, such as exposed nail points, sharp edges, and rough or broken boards, and shall provide privacy and protection from the elements. (b) Building ventilation shall be equally divided between the bottom and top halves of the room. All vents shall be screened with sixteen (16) mesh screen of durable material. (c) Buildings shall be of fly -tight construction and shall have self-closing doors with an inside latch. (d) Pits. tanks or vaults shall be vented to the outside atmosphere by a flue or vent stack having a minimum inside diameter of four (4) inches. Vents shall extend not less than twelve (12) inches above the roof. (e) Interior floors, walls, ceilings, partitions, and doors shall be finished with readily cleanable impervious materials resistant to wastes, cleansers and chemicals. Floors and risers shall be constructed of impervious material and in a manner which will prevent entry of vermin. (f) Seat tops shall be not less than twelve (12) inches nor more than sixteen (16) inches above the floor. The seat openings shall be covered with attached. open -front toilet seats wit: lids, both of which can be raised to allow use as a urinal. (g) The distance between the front of the riser and the building wall shall not be less than twenty-one (21) inches. (2) Privies. In addition to complying with the requirements specified in Section 1 of this Rule, privies shall be provided with: (a) Vents equal in area to not less than one-fifth (1/5) the floor area or a minimum of three (3) square feet, whichever is greater. (b) A minimum clear space of twenty-four (24) inches betweeen seats in multiple -unit installations and a clear space of twelve (12) inches from the seat opening to the building wall in both single and multiple units. SSR ULE .3 (9-16-86) 73-21 On -Site Sewage Disposal DEPARTMENT OF MWIRONKENTAL QUALITY Water Quality Program 0107 2041 (3) Portable Toilet Shelters. Portable toilet shelters may be prefabricated, skid mounted, or mobile. In addition to complying with the requirements specified in Section 1 of this Rule. portable toilet shelters.shall: (a) Provide screened ventilation to the outside atmosphere having a minimum area of one (1) square foot per seat. (b) Provide a minimum floor space outside of the riser of nine (9) square feet per seat. (c) Be furnished with a toilet tissue holder for each seat. (d) Be located in areas readily accessible to users and to pumping/cleaning services. (e) Provide separate compartments with doors and partitions or walls of sufficient height to insure privacy in multiple - unit shelters except that separate compartments are not required for urinals. SSRULE.3 (9-16-86) 73-22 Oa -Site Sewage Disposal DEPARMENT OF ENVIROHI=AL Q94ITY Water Quality_ Program 340-73-070 UNSEAI.F.D 'FARTS PITS FOR PRIVIES. 0107 2042 (1) The pit shall be constructed of such material and in such a manner as to prevent rapid deterioration, provide adequate capacity, and facilitate maintenance in a satisfactory manner under ordinary conditions of usage. (2) The pit shall provide a capacity of fifty (50) cubic feet for each seat installed in the privy building and shall be at least five (5) feet deep. The area within sixteen (16) inches of the surface grade shall not be counted as part of the fifty (50) cubic—foot capacity. (3_) Pit cribbing shall fit final.y and be in uniform contact with the earth walls on all sides, and shall rise at least six (6) inches above the original ground line and descend to the full depth of the pit. However, pit cribbing below the soil line may be omitted in rock formations. SSRULE.3 (9-16-66) 73-23 0t -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALM Water Quality Program 340-73-075 SELF-CONTAINED NONWATER-CARRIED TO=T FACILITIES 07 043 (1) General Standards. All self-contained nonwater-carried toilet facilities shall comply with the following requirements: (a)' They shall have water -tight chambers constructed of reinforced concrete, plastic, fiberglass, metal, or of other material of acceptable durability and corrosion resistance, approved by the Department, and designed to facilitate the removal of the wastes. (b) Black wastes shall be stored in an appropriate chamber until removal for final disposal elsewhere. Wastes shall be removed from the chamber whenever necessary to prevent overf 1 ow . (c) Chemicals containing heavy metals, including but not limited to copper. cadmium and -zinc. shall not be used in self- contained toilet facilities. (d) All surfaces subject to soiling shall be impervious, easily cleanable, and readily accessible. (2) Vault Toilet Facilities: (a) The minimum capacity of vaults shall be three hundred -fifty (350) gallons or, in places of employment, one hundred (100 ) gallons per seat. (b) Caustic shall be added routinely to vault chambers to control odors. (3) Chemical Toilet Facilities: (a) Toilet bowls shall be constructed of stainless steel, plastic, fiberglass, ceramic or of other material approved by the Department. (b) Waste passages shall have smooth surfaces and be free of obstructions, recesses or cross braces which would restrict or interfere with flow of black wastes. (c) Biocides and oxidants shall be added to waste detention chambers at rates and intervals recommended by the chemical manufacturer and approved by the Department. (d) Chambers and receptacles shall provide a minimum storage capacity of fifty (50) gallons per seat. SSRULE.3 (9-16-86) 73-24 on -Site Sewage Disposal OF ENVIRONIENTAI. QUALITY WaterPro ram '7 . (e) Portable shelters housing chemical toilets shall display the business name of the licensed sewage disposal service that is responsible for servicing them. SSRULE.3 (9-16-86) 73-25 On -Site Sewage Disposal DEPARIIENT OF ENVIRONKMAL QUALITY Water Quality Program 340-73-080 CONSTIMCTION OF GW WATER WASTE DISPOSAL. SM4PS0100 2045 A gray water waste disposal sump shall consist of a receiving chamber, settling chamber, and either a seepage chamber or disposal trench. An acceptable design for gray water waste disposal sumps is shown in OAR 340, Division 71, Diagrams 14 and 15.. SSRULE.3 (9-16-86) 73-26 On -Site Sewage Disposal DEPARTMENT OF ENVIRONMENTAL QUALITY Water Quality Program 340-73-085 FLEXIBLE MEMBRANE LINERS FOR SAHD FILTERS TREATING SEPTIC TANK EFFLUENT. (1) Unsupported polyvinyl chloride (PVC) shall have the fol properties: 0�1�1F77 2VA46 �owi/�ng__ Property Test Method (a) Thickness ASTM D15 93 30 mil, minimum Para 8.1.3 (b) Specific Gravity ASTM D792 (minimum) Method A (c) Minimum Tensile Properties ASTM D882 (each direction) (A) Breaking Factor (pounds/inch width) (B) Elongation at Break (percent) (C) Modulus (force) at 100% Elongation (pounds/inch width) (d) Tear Resistance (pounds, minimum) (e) Low Temperature (f) Dimensional Stability (each direction, percent change maximum) (g) Water Extraction (h) Volatile Loss (i) Resistance to Soil Burial (percent chatge maximum in original value) (A) Breaking Factor (B) Elongation at Break Method A or B 69 (1 inch wide) Method A or B 300 Method A or B 27 ASTM D1004 8 Die C ASTM D1790 -20 of ASTM D1204 f5 2120F, 15 min. ASTM D1239 -0.35% max. ASTM D1203 0.7% mag. Method A ASTM D3083 -5 -20 SSRULE.3 (9-16-86) 73-27 Oo-Site Savage Disposal, DEPARTMENT OF MWIRON19WAL QUALITY Water.Quality Program 0107 2047 (C) Modulus at 100% Elongation +10 (j) Bonded Seam Strength (factory seam, breaking factor, ppi width) (k) Hydrostatic Resistance (2) Installation Standards: ASTM D3083 55.2 ASTM D751 82 Method A (a) Patches, repairs and seams shall have the same physical properties as the parent material. (b) Site considerations and preparation: (A) The supporting surface slopes and foundation to accept the liner shall be stable and structurally sound including appropriate compaction. Particular attention shall be paid to the potential of sink hole development and differential settlement. (B) Soil stabilizers such as cementations or chemical binding agents shall not adversely affect the membrane; cementations and chemical binding agents may be potentially abrasive agents. (c) Only fully buried membrane liner installation shall be considered to avoid weathering. (d) Unreinforced liners have high elongation and can conform to irregular surfaces and follow settlements within limits. Unreasonable strain reduces effective thickness and may reduce life expectancy by.lessening the chemical resistance of the thinner (stretched) material. Every effort shall be made to minimize the strain (or elongation) anywhere in the flexible membrane liner. (e) Construction of site: (A) Surface condition: (i) Preparation of earth subgrade. The prepared subgrade shall be of soil types no larger than Unified Soil Classification System (USCS) sand (SP) to a minimum of four (4) inches below the surface and free from loose earth, rock, fractured stone, debris, cobbles, rubbish and roots. The surface of the completed subgrade shall be properly compacted, smooth, uniform and SSRULE.3 (9-16-86) 73-28 Oa -Site Sewage Disposal DEPARMUM OF ENVIRONMENTAL QUALITY Water Quality Program, 0107 2048 free from sudden changes in grade. Importing suitable soil may be required. (ii) Maintenance of subgrade. The earth subgrade shall be maintained in a smooth, uniform and compacted condition during installation of the lining. (B) Climatic conditions: (i) Temperature. The desirable temperature range for membrane installation is 42OF to 780F. Lower or higher temperatures may have an adverse effect on transportation, storage, field.handling and placement, seaming and backfilling and attaching boots and patches may be difficult. Placing liner outside the desirable temperature range shall be avoided. (ii) Wind. Wind may have an adverse effect on liner installation such as interfering with liner placement. Mechanical damage may result. Cleanliness of areas for boot connection and patching may not be possible. Alignment of seams and cleanliness may not be possible. Placing the liner in high wind shall be avoided. (iii) Precipitation. When field seaming is adversely affected by moisture, portable protective structures and/or other methods shall be used to maintain a dry sealing surface. _ Proper surface preparation for bonding boots and patches may not be possible. Seaming. patching and attaching 'boots' shall be done under dry conditions. (C) Structures. Penetration of a flexible liner by any designed means shall be avoided. Where penetrations are necessary, such as horizontal 'and vertical pipes, it is essential to obtain a secure, liquid -tight seal between the pipes and the flexible liner. Liners shall be attached to pipes with a mechanical type seal supplemented by a chemically compatible caulking or adhesives to effect a liquid -tight seal. The highest order of compaction shall be provided in the area adjacent to pipes to compensate for any settlement. (D) Liner Placement: (i) Size. The final cut size of the liner shall be carefully determined and ordered to generously SSRDLE.3 (9-16-86) 73-29 On, -Site Sewage Disposal DEPARITMNT OF EMRODIIMENTAL QUALITY Water Quality Program 0107-2Meld fit the container geometry without semi: g or excess straining of the liner material. (ii) Transportation, handling and storage. Trans- portation, handling and storage procedures shall be planned to prevent material damage. Material shall be stored in a secured area and protected from adverse weather. (iii) Site inspection. A site inspection shall be carried out by the Agent and the installer prior to liner installation to verify surface conditions, etc. (iv) Deployment. Panels shall be positioned to minimize handling. Seaming should,not be necessary. Bridging or stressed conditions shall be avoided with proper slack allowances for shrinkage. The liner shall be secured to prevent movement and promptly backfilled. (v) Anchoring trenches. The liner edges should be secured frequently in a backfilled trench. (vi) Field seaming. Field seaming, if absolutely necessary, shall only be attempted when weather conditions are favorable. The contact surfaces of the materials should be clean of dirt, dust. moisture, or other foreign materials. The contact surfaces shall be aligned with sufficient overlap and bonded in accordance with the suppliers recommended procedures. Wrinkles shall be smoothed out and seams should be inspected by nondestructive testing techniques to verify their integrity. As seaming occurs during installation, the field seams shall be inspected continuously and any faulty area repaired immediately. (vii) Field repairs. It is important that traffic on the lined area be minimized. Any necessary repairs to the liner shall be patched using the same lining material and following.the recommended procedure of the supplier. (viii) Final inspection and acceptance. Completed liner installations shall be visually checked for punctures, rips, tears and seam discontinuities before placement of any backfill. At this time the installer shall also SSP=.3 (9-16-36) 73-30 Oct -Site Sewage Disaosal DEPARTMENT OF IIALITY Water9W1jWZ-9rURiL ulul. 4K manually check all factory and f:ald seams with an appropriate tool. In lieu of or in addition to manual checking of seamy �y the installer, either of the following tests may be performed: (I) Wet Test: The lined basin shall be flooded to the four (4) foot level with water after inlets and outlets have been plugged. Workmanship shall be accepted if leakage rate in a 24-hour period is no greater than 0.25 inches. (II) Air Lance'Test: Inspect all seams (factory and field) for unbonded areas using an air nozzle directed on the upper seam edge and surface to detect loose edges. Riffles indicate unbonded areas within the seam, or other undesirable seam constructicn. Check all bonded seams using a minimum 50 PSI (gauge) air supply directed through a 3/16 inch (typical) nozzle, held not more than 2 inches from the seam edge and directed at the seam edge. (3) Operation and Maintenance Standards. The owner/purchaser of a sand filter system must recognize that he assumes the continuous responsibility to preserve the installation as near as practical in its "as built" state. This responsibility includes the control or erosion of any "mound," the control and removal of large perennial plants, the fencing out of livestock and the control of burrowing animals. SZMnZ.3 (3-:6-36) -3-31 On -Site Sewage Disposal