1. Q: What does VCLG stand for? ANSWER Vertical Closed-Loop
Geothermal
2. Q: What is the minimum distance a well must be from a property line
in NJ? ANSWER 50 feet
3. Q: What is the minimum distance from a septic system? ANSWER 100
feet
4. Q: What is the minimum distance from a water supply well? ANSWER
100 feet
5. Q: Who issues well drilling licenses in New Jersey? ANSWER New
Jersey Department of Environmental Protection (NJDEP)
6. Q: What is the minimum well casing diameter for geothermal wells?
ANSWER 4 inches
7. Q: How long must well construction records be retained? ANSWER 5
years
8. Q: What type of cement must be used for grouting? ANSWER Portland
cement or bentonite-based grout approved by NJDEP
9. Q: What is the minimum grout coverage from surface? ANSWER At
least 20 feet or to bedrock
10.Q: When must a well permit be obtained? ANSWER Before any drilling
begins
11.Q: What is the maximum time allowed to complete grouting after
casing installation? ANSWER 24 hours
12.Q: What is the purpose of the annular space seal? ANSWER To prevent
contamination and protect groundwater quality
,13.Q: What is the minimum depth for surface casing? ANSWER 20 feet or
to bedrock, whichever is deeper
14.Q: Who must sign the well completion report? ANSWER The licensed
well driller
15.Q: What is the minimum well cap requirement? ANSWER Watertight,
vermin-proof cap
16.Q: How soon must a well completion report be filed? ANSWER Within
30 days of completion
17.Q: What is the minimum distance from a building foundation?
ANSWER 10 feet
18.Q: What material is prohibited for well casing? ANSWER Lead and
galvanized steel in certain applications
19.Q: What is the purpose of a drilling log? ANSWER To record geological
formations encountered during drilling
20.Q: Who can witness a well pressure test? ANSWER A licensed well
driller or NJDEP inspector
21.Q: What is the minimum grout strength requirement? ANSWER 500 psi
compressive strength
22.Q: How must geothermal loops be pressure tested? ANSWER At 1.5
times operating pressure for at least 1 hour
23.Q: What is the minimum loop pipe wall thickness? ANSWER SDR-11 or
equivalent
24.Q: What fluid is acceptable for pressure testing? ANSWER Water or
antifreeze solution
25.Q: When must a well be sealed if abandoned? ANSWER Immediately
upon abandonment
26.Q: What is the purpose of the well permit? ANSWER To ensure
compliance with state regulations and protect groundwater
27.Q: What information must be on a well identification tag? ANSWER
Well permit number, driller license number, and date of completion
, 28.Q: What is the minimum concrete pad thickness around the well?
ANSWER 4 inches
29.Q: How far must the concrete pad extend from the casing? ANSWER At
least 2 feet in all directions
30.Q: What is the slope requirement for the concrete pad? ANSWER
Minimum 1% slope away from the well
31.Q: Can a well be drilled in a flood hazard area? ANSWER Only with
special permits and flood-proofing measures
32.Q: What is the purpose of a pitless adapter? ANSWER To provide a
sanitary connection below the frost line
33.Q: What is the minimum frost depth consideration in NJ? ANSWER 36
inches
34.Q: How must drilling fluids be disposed of? ANSWER According to
NJDEP waste disposal regulations
35.Q: What is the maximum allowable deviation from vertical? ANSWER 2
degrees per 100 feet
36.Q: When is a geophysical log required? ANSWER For wells deeper than
200 feet or as specified by permit
37.Q: What is the purpose of a tremie pipe? ANSWER To place grout from
the bottom up without segregation
38.Q: What is the minimum tremie pipe diameter? ANSWER 1.5 inches
39.Q: How long must grout be allowed to cure? ANSWER At least 24 hours
before pressure testing
40.Q: What is the requirement for backflow prevention? ANSWER
Required on all geothermal loop connections
41.Q: When must drilling be suspended? ANSWER When contamination is
encountered or safety hazards exist
42.Q: Who must be notified if contamination is found? ANSWER NJDEP
immediately
43.Q: What is the maximum daily production rate for test wells? ANSWER
As specified in the permit
Geothermal
2. Q: What is the minimum distance a well must be from a property line
in NJ? ANSWER 50 feet
3. Q: What is the minimum distance from a septic system? ANSWER 100
feet
4. Q: What is the minimum distance from a water supply well? ANSWER
100 feet
5. Q: Who issues well drilling licenses in New Jersey? ANSWER New
Jersey Department of Environmental Protection (NJDEP)
6. Q: What is the minimum well casing diameter for geothermal wells?
ANSWER 4 inches
7. Q: How long must well construction records be retained? ANSWER 5
years
8. Q: What type of cement must be used for grouting? ANSWER Portland
cement or bentonite-based grout approved by NJDEP
9. Q: What is the minimum grout coverage from surface? ANSWER At
least 20 feet or to bedrock
10.Q: When must a well permit be obtained? ANSWER Before any drilling
begins
11.Q: What is the maximum time allowed to complete grouting after
casing installation? ANSWER 24 hours
12.Q: What is the purpose of the annular space seal? ANSWER To prevent
contamination and protect groundwater quality
,13.Q: What is the minimum depth for surface casing? ANSWER 20 feet or
to bedrock, whichever is deeper
14.Q: Who must sign the well completion report? ANSWER The licensed
well driller
15.Q: What is the minimum well cap requirement? ANSWER Watertight,
vermin-proof cap
16.Q: How soon must a well completion report be filed? ANSWER Within
30 days of completion
17.Q: What is the minimum distance from a building foundation?
ANSWER 10 feet
18.Q: What material is prohibited for well casing? ANSWER Lead and
galvanized steel in certain applications
19.Q: What is the purpose of a drilling log? ANSWER To record geological
formations encountered during drilling
20.Q: Who can witness a well pressure test? ANSWER A licensed well
driller or NJDEP inspector
21.Q: What is the minimum grout strength requirement? ANSWER 500 psi
compressive strength
22.Q: How must geothermal loops be pressure tested? ANSWER At 1.5
times operating pressure for at least 1 hour
23.Q: What is the minimum loop pipe wall thickness? ANSWER SDR-11 or
equivalent
24.Q: What fluid is acceptable for pressure testing? ANSWER Water or
antifreeze solution
25.Q: When must a well be sealed if abandoned? ANSWER Immediately
upon abandonment
26.Q: What is the purpose of the well permit? ANSWER To ensure
compliance with state regulations and protect groundwater
27.Q: What information must be on a well identification tag? ANSWER
Well permit number, driller license number, and date of completion
, 28.Q: What is the minimum concrete pad thickness around the well?
ANSWER 4 inches
29.Q: How far must the concrete pad extend from the casing? ANSWER At
least 2 feet in all directions
30.Q: What is the slope requirement for the concrete pad? ANSWER
Minimum 1% slope away from the well
31.Q: Can a well be drilled in a flood hazard area? ANSWER Only with
special permits and flood-proofing measures
32.Q: What is the purpose of a pitless adapter? ANSWER To provide a
sanitary connection below the frost line
33.Q: What is the minimum frost depth consideration in NJ? ANSWER 36
inches
34.Q: How must drilling fluids be disposed of? ANSWER According to
NJDEP waste disposal regulations
35.Q: What is the maximum allowable deviation from vertical? ANSWER 2
degrees per 100 feet
36.Q: When is a geophysical log required? ANSWER For wells deeper than
200 feet or as specified by permit
37.Q: What is the purpose of a tremie pipe? ANSWER To place grout from
the bottom up without segregation
38.Q: What is the minimum tremie pipe diameter? ANSWER 1.5 inches
39.Q: How long must grout be allowed to cure? ANSWER At least 24 hours
before pressure testing
40.Q: What is the requirement for backflow prevention? ANSWER
Required on all geothermal loop connections
41.Q: When must drilling be suspended? ANSWER When contamination is
encountered or safety hazards exist
42.Q: Who must be notified if contamination is found? ANSWER NJDEP
immediately
43.Q: What is the maximum daily production rate for test wells? ANSWER
As specified in the permit
