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Commissioner's Journal are hereby repealed and superseded by the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other provisions repealed shall be treated as still remaining in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
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` ¢ 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)
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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.
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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
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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
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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
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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
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N .a
t �
y �'Na
oo°a o
ij I OCc
I I n opeoC
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W i E
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ato
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I
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C
«� $4
•.-i N
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ce
$4
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4 '
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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
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.� —�—
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oa a o
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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
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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
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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