TABLE I
Sewer and Septic Tank Minimum Distances
| ||
---|---|---|
Requirement
|
Distance
(feet)
| |
Property line
|
10
| |
Occupied buildings
|
10
| |
Buried water pipe under pressure
|
10
| |
Domestic water supply
|
50
| |
Buried water pipe under suction
|
50
|
TABLE II
Minimum Capacities for Septic Tanks
(Provides for use of garbage grinders, automatic washers and other
household appliances)
| ||
---|---|---|
Number of Bedrooms
|
Minimum Tank Capacity
(gallons)
| |
3
|
900
| |
4
|
1,000
| |
Each additional
|
250
| |
The liquid capacity of a septic tank shall provide a sewage detention
period of not less than 24 hours in the tank. Sewage flow shall be computed
according to types of establishment and water use. With sewage flows greater
than 1,500 gallons per day, the liquid tank capacity shall equal 1,125 gallons
plus 75% of the daily anticipated sewage flow.
|
TABLE III
Location of Subsurface Disposal Field
| ||
---|---|---|
Requirement
|
Distance
(feet)
| |
Any water supply or buried water suction pipe
|
100
| |
Streams
|
50
| |
Occupied buildings
|
10
| |
Large trees
|
10
| |
Property lines or buried pipe distributing water under pressure
|
10
|
TABLE IV
Absorption Area Requirements for Private Residences
(Provides for garbage grinder and automatic-sequence washing machines)
| ||
---|---|---|
Required Absorption Percolation Rate
(time required for water to fall 1 inch)
(in minutes)
|
Area
(per bedroom; standard trench and seepage pits)
(in square feet)
| |
1 or less
|
70
| |
2
|
85
| |
3
|
100
| |
4
|
115
| |
5
|
125
| |
10
|
165
| |
15
|
190
| |
30
|
250
| |
45
|
300
| |
60
|
330
|
NOTES:
| |
---|---|
1.
|
In every case, sufficient area shall be provided for at least two bedrooms.
|
2.
|
Absorption area for standard trenches is computed as trench-bottom area.
|
3.
|
Absorption area for seepage pits is computed as effective sidewall area
beneath the inlet.
|
4.
|
Soils are unsuitable for seepage pits if the percolation rate is 30
minutes or more, and are unsuitable for any subsurface leaching system if
the percolation rate is 60 minutes or more.
|
TABLE V
Absorption Area Requirements for Other Establishments
| ||
---|---|---|
Percolation Rate
(Time required for water to fall 1 inch)
(in minutes)
|
Maximum Rate of Sewage Application for Standard Trenches and Seepage
Pits
(gallons per square foot per day)
| |
1 or less
|
5.0
| |
2
|
3.5
| |
3
|
2.9
| |
4
|
2.5
| |
5
|
2.2
| |
10
|
1.6
| |
15
|
1.3
| |
30
|
0.9
| |
45
|
0.8
| |
60
|
0.6
|
NOTES:
| |
---|---|
1.
|
These figures do not include effluents from septic tanks that receive
wastes from garbage grinders and automatic washing machines.
|
2.
|
Absorption area for standard trench is computed as trench-bottom area.
|
3.
|
Absorption area for seepage pits is computed as effective sidewall area
beneath the inlet.
|
4.
|
Soils are unsuitable for seepage pits or leaching systems if the percolation
rate is 30 minutes or more.
|
TABLE VI
Distances Between Trenches
| ||
---|---|---|
Minimum Distance Trench Width
(inches)
|
Between Center Line of Trenches
(feet)
| |
12 to 18
|
6
| |
18 to 24
|
6.5
| |
24 to 30
|
7.0
| |
30 to 36
|
7.5
|