Sources of Contamination
|
Minimum Lateral Distances
(feet)
| ||
---|---|---|---|
Subsurface disposal facilities
|
125
| ||
Where soil percolation is greater than or equal to 6 minutes
an inch
| |||
Subsurface disposal fields
|
125
| ||
Where soil percolation is less than 6 minutes per inch
| |||
Cesspools, seepage pits
|
150
| ||
Public ways
|
100
| ||
Leaching fields
|
125
| ||
Septic tank, distribution box, dosing tank
|
75
| ||
Underground petroleum storage tank
|
1,000
| ||
Sewers (watertight joints)
|
75
| ||
Footing drains
|
50
| ||
Surface water
|
50
| ||
Property line
|
50
|
Type
|
Depth of Surface Seal
(feet)
| |
---|---|---|
Local water supply wells
|
20
| |
Domestic wells
|
6
|
*
|
Clay in the form of a mud-laden fluid is similar to and has
the advantage of neat cement and cement grout. There is a disadvantage
in that clay may separate out of the fluid. A bentonite-gelatinous
mud is recommended. Concrete is useful in sealing large-diameter wells,
particularly where the width of annular ring is several inches or
more. However, unless care is exercised during placement, the coarse
aggregate may become separated from the cement.
|
Chemical and Mineral Quality
| ||
Arsenic
|
Not to exceed 0.05 ppm
| |
Copper
|
Not to exceed 1.0 ppm
| |
Color
|
Not to exceed 15.0 units
| |
Turbidity
|
Not to exceed 1 turbidity unit
| |
Odor
|
Not to exceed 3 threshold
| |
**Sodium
|
Not to exceed 20 mg/l
| |
pH
|
Between 6.5 and 8.5
| |
Chloride
|
Not to exceed 250 mg/l
| |
Total iron
|
Not to exceed 0.3 mg/l
| |
Total hardness
|
Not to exceed 50 mg/l
| |
Sulfate
|
Not to exceed 250 mg/l
| |
Manganese
|
Not to exceed 0.005 mg/l
| |
Nitrogen-nitrite
|
Not to exceed 1 mg/l
| |
Nitrogen-nitrate
|
Not to exceed 10 mg/l
| |
Organics
|
EPA method 524 - not to exceed standards
|
**
|
This standard is included to inform the prospective homeowners.
Failure does not constitute disapproval of the well.
|
Well Depth
(feet)
|
Minimum Gallons/Minimum for 4 Hours
| |
---|---|---|
0 to 150
|
5 to 6
| |
150 to 200
|
4
| |
200 to 300
|
2 to 3
| |
300 and over
|
1 to 2
|