NGWA - Study Questions - Augering &
Monitoring Well
• The primary item which dictates the type of drilling equipment to be used
on a site is...
- CORRECT ANSWER-... geology.
• The commonly used hollow-stem auger system for monitoring well
installations...
- CORRECT ANSWER-... should include an auger head than can be machined
to accent a plate that facilitates well installation below the ground water
level.
• Which is NOT a component of a monitoring well rig?
- CORRECT ANSWER- Mud pump.
• What is the minimum size hollow-stem auger, casing, or borehole used for
installation of a typical 2-inch well?
- CORRECT ANSWER- 4.25 in.
• The best drilling method to use in a highly toxic contaminated limestone
formation that would produce the least fluid management would be?
- CORRECT ANSWER- Cable tool.
• Monitoring wells are commonly installed...
- CORRECT ANSWER-... downgradient of a landfill to determine ground
water contamination.
• Which of the following is not an impermeable material?
- CORRECT ANSWER- Sand.
• Glacial drift is defined as...
- CORRECT ANSWER- Unconsolidated sediment transported by glaciers and
disposed and deposited directly on land or sea.
, • What type of material(s) is(are) typically on monitor wells for a seal above
the filter packs?
- CORRECT ANSWER- Bentonite pellets.
• The most efficient method of drilling a bedrock monitoring well would be...
- CORRECT ANSWER-... air rotary with a down-hole hammer.
• The difference between the flight OD and the ID of a hollow-stem auger is
generally...
- CORRECT ANSWER- 4-5 inches.
• The safety of operation of a hollow-stem auger drill rig is compromised
when...
- CORRECT ANSWER-... drilling operations occur closer than the 100' safety
zone from an electrical line.
• Daily inspection of drilling equipment should include, but is not limited to...
- CORRECT ANSWER- Inspection of cable, hoses, etc.
All fluid levels
First aid kit available
• The drilling method used to construct a monitoring well should...
- CORRECT ANSWER-... minimize disturbance of subsurface materials.
• The "auger fork" is a device that slips through the flights of the auger
column and...
- CORRECT ANSWER-... keeps the augers from "sliding" back into the
borehole when removing the augers from the borehole.
• For drilling operations at a hazardous waste site, the exclusion zone is...
- CORRECT ANSWER-... the area on-site that is potentially contaminated and
where workers must wear PPE as stipulated in the site specific health and
safety plan.
• An advantage of using hollow-stem augers is...
- CORRECT ANSWER-... no drilling fluid is used, eliminating contamination
by drilling fluid additives.
Monitoring Well
• The primary item which dictates the type of drilling equipment to be used
on a site is...
- CORRECT ANSWER-... geology.
• The commonly used hollow-stem auger system for monitoring well
installations...
- CORRECT ANSWER-... should include an auger head than can be machined
to accent a plate that facilitates well installation below the ground water
level.
• Which is NOT a component of a monitoring well rig?
- CORRECT ANSWER- Mud pump.
• What is the minimum size hollow-stem auger, casing, or borehole used for
installation of a typical 2-inch well?
- CORRECT ANSWER- 4.25 in.
• The best drilling method to use in a highly toxic contaminated limestone
formation that would produce the least fluid management would be?
- CORRECT ANSWER- Cable tool.
• Monitoring wells are commonly installed...
- CORRECT ANSWER-... downgradient of a landfill to determine ground
water contamination.
• Which of the following is not an impermeable material?
- CORRECT ANSWER- Sand.
• Glacial drift is defined as...
- CORRECT ANSWER- Unconsolidated sediment transported by glaciers and
disposed and deposited directly on land or sea.
, • What type of material(s) is(are) typically on monitor wells for a seal above
the filter packs?
- CORRECT ANSWER- Bentonite pellets.
• The most efficient method of drilling a bedrock monitoring well would be...
- CORRECT ANSWER-... air rotary with a down-hole hammer.
• The difference between the flight OD and the ID of a hollow-stem auger is
generally...
- CORRECT ANSWER- 4-5 inches.
• The safety of operation of a hollow-stem auger drill rig is compromised
when...
- CORRECT ANSWER-... drilling operations occur closer than the 100' safety
zone from an electrical line.
• Daily inspection of drilling equipment should include, but is not limited to...
- CORRECT ANSWER- Inspection of cable, hoses, etc.
All fluid levels
First aid kit available
• The drilling method used to construct a monitoring well should...
- CORRECT ANSWER-... minimize disturbance of subsurface materials.
• The "auger fork" is a device that slips through the flights of the auger
column and...
- CORRECT ANSWER-... keeps the augers from "sliding" back into the
borehole when removing the augers from the borehole.
• For drilling operations at a hazardous waste site, the exclusion zone is...
- CORRECT ANSWER-... the area on-site that is potentially contaminated and
where workers must wear PPE as stipulated in the site specific health and
safety plan.
• An advantage of using hollow-stem augers is...
- CORRECT ANSWER-... no drilling fluid is used, eliminating contamination
by drilling fluid additives.
