A.
When establishing a well location, the professional
engineer shall identify actual or potential sources of contamination
and apply the following minimal lateral distances for each source
listed.
|
Source of Contamination
|
Minimum Lateral Distance
| ||
|---|---|---|---|
|
1.
|
Subsurface sewage disposal field, cesspool,
seepage pit, in use, abandoned or reserved area
|
Where topography gradient is 1% or less or slopes
away from well site, or percolation rate is greater than 8 minutes
per inch, the minimum required distances shall comply with 310 CMR
15.00. Required distances shall be increased 50% when percolation
rate is less than 8 minutes per inch and gradient is more than 1%
and slopes toward well site.
| |
|
2.
|
Septic tank
|
Minimum required by 310 CMR 15.00
| |
|
3.
|
Building sewer/sewer lines
|
Minimum required by 310 CMR 15.03 Note 3
| |
|
4.
|
Property line
|
50% of minimum distance required in #1 above
| |
|
5.
|
Public way
|
50% of minimum distance required in #1 above
when topography gradient is 1% or less or slope is upward toward well
site. When lot slopes from public way downward to well site, distance
shall be equal to minimum required in 310 CMR 15.00
| |
|
6.
|
Private driveway
|
15 feet
| |
|
7.
|
Underground storage tanks, all uses
|
Tanks and piping shall conform to 527 CMR 9.00--
25 feet
| |
|
8.
|
Rights-of-way controlled by herbicides or pesticides
|
50 feet from edge of right-of-way. Owner shall
post and maintain a sign at edge of right-of-way as required in 333
CMR 11
| |
B.
No variance shall be granted for lesser distances.
C.
Alternate or state-of-the-art protection from contamination
may be proposed to the Board by an owner. The Board shall be the sole
arbitrator in judging whether to accept such alternate or state-of-the-art
protection.
A.
Bored or drilled wells shall be constructed by licensed
well drillers and utilize latest acceptable standards for construction
or comply with Massachusetts laws and regulations.
B.
Dug wells shall be protected from surface water contamination
and sheltered from rainwater. Fencing shall be erected to provide
safety to humans and prevent animal trespass.
A.
Yield test pumping shall be conducted at a rate at
least equal to the pumping rate expected during normal well use and
shall be conducted for a minimum of four hours.
B.
The required minimum well yield may vary depending
on the depth of the well. A well is required to yield 110 gallons/bedroom/day
as per 310 CMR 15.00. The minimum well yield shall conform to the
following table:
|
Depths of Water in Well
(feet)
|
Gallons Per Minute for Four Hours
| |
|---|---|---|
|
0 - 150
|
5
| |
|
150 - 200
|
4
| |
|
200 - 250
|
3
| |
|
250 - 300
|
1 1/2
| |
|
300 and deeper
|
1/2
|
A.
No private well shall be used as a drinking water
supply until the water derived from the well has been tested and satisfies
quality standards enacted by the Board of Health.
B.
Chemical and bacteriological analyses shall be conducted
by a laboratory licensed by the Commonwealth of Massachusetts and
shall identify the following:
|
Constituent
|
Maximum acceptable standards
| |
|---|---|---|
|
Coliform bacteria
|
None detected
| |
|
Sodium (Na)
|
20 mg/l
| |
|
Chloride (Cl)
|
250 mg/l
| |
|
Nitrate nitrogen (NO3)
|
10 mg/l
| |
|
Nitrite nitrogen
|
0.001 mg/l
| |
|
Iron (Fe)
|
0.3 mg/l
| |
|
Manganese (Mn)
|
0.05 mg/l
| |
|
pH
|
6.0 - 9.0
| |
|
Total hardness
|
150 mg/l
|
C.
No variances shall be granted from these standards.
D.
Additional tests may be required by the Board.
