NGWA - Augering & Monitoring Well
Study Questions and Answers (Verified)
A "travel blank" is a special sample vial that... - ANSWER-... contains ASTM Type II
reagent water and is shipped to the laboratory with ground water samples that are to be
tested for VOCs.
A disadvantage of using cable tool drilling for monitoring wells is... - ANSWER-...
possible problems in controlling heaving sands.
A flush mount well cover should have... - ANSWER-... concrete in the base.
A piezometer is... - ANSWER-... an instrument placed in the ground water used to
measure pressure (head).
A poorly developed monitoring well can lead to which of the following? - ANSWER-1.
Low production rate.
2. High turbidity.
3. Non-representative ground water samples.
Air in the discharge line of a recovery well system could be caused by... - ANSWER-
Hole in drop pipe
Cascading water
Plugged screen and cavitation
An advantage of using hollow-stem augers is... - ANSWER-... no drilling fluid is used,
eliminating contamination by drilling fluid additives.
An auger head uses... - ANSWER-... tungsten faced forged steel teeth.
Contamination from the cement grout leaking into the filter pack may be indicated by... -
ANSWER-... high pH.
Daily inspection of drilling equipment should include, but is not limited to... - ANSWER-
Inspection of cable, hoses, etc.
All fluid levels
First aid kit available
Different types of knock-out plugs are used when reaming holes. Which type is not
generally used? - ANSWER-Flat low carbon steel.
Doubling the inside diameter of casing in a well will increase its cross sectional area
by... - ANSWER-... 4 times.
, Due to the advanced technology, today's monitoring equipment and material... -
ANSWER-...
Federal Motor Carrier safety regulations require the driver of a CMV of 10,001 lbs.
combined weight or over to have... - ANSWER-... a medical card and valid driver's
license.
For drilling operations at a hazardous waste site, the exclusion zone is... - 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.
Glacial drift is defined as... - ANSWER-Unconsolidated sediment transported by glaciers
and disposed and deposited directly on land or sea.
Hollow-stem auger drill rigs have many components which make up the drill rig. Which
items are not generally part of the package? - ANSWER-Down the hole hammer and
float sub.
Hollow-stem augers are commonly used to install wells because... - ANSWER-... soil
sampling is easy and accurate in most cases.
How far can a well screen section be moved vertically after a filter pack and bentonite
seal have been placed? - ANSWER-The length of the filter pack above the screen.
If decontamination procedures are not followed, what piece(s) of drill equipment is (are)
most likely to contaminate a well? - ANSWER-1. Drill rods.
2. Augers.
3. Samplers.
In order to establish project expectations, the drilling contractor should... - ANSWER-1.
Request and review the statement of work.
2. Discuss project specifics with the project manager.
3. Outline the statement of work with the drill crew.
In selecting a fluid for a well, the following consideration should be given. - ANSWER-
Fluid should be selected on the basis of the circumstances of each individual well.
Monitoring wells are commonly installed... - ANSWER-... downgradient of a landfill to
determine ground water contamination.
Monitoring wells used to sample ground water should always be... - ANSWER-1.
Installed with great care to avoid contamination from the drilling process
2. Installed to protect the well from surface pollution.
3. Protected with secure well protective covers.
Study Questions and Answers (Verified)
A "travel blank" is a special sample vial that... - ANSWER-... contains ASTM Type II
reagent water and is shipped to the laboratory with ground water samples that are to be
tested for VOCs.
A disadvantage of using cable tool drilling for monitoring wells is... - ANSWER-...
possible problems in controlling heaving sands.
A flush mount well cover should have... - ANSWER-... concrete in the base.
A piezometer is... - ANSWER-... an instrument placed in the ground water used to
measure pressure (head).
A poorly developed monitoring well can lead to which of the following? - ANSWER-1.
Low production rate.
2. High turbidity.
3. Non-representative ground water samples.
Air in the discharge line of a recovery well system could be caused by... - ANSWER-
Hole in drop pipe
Cascading water
Plugged screen and cavitation
An advantage of using hollow-stem augers is... - ANSWER-... no drilling fluid is used,
eliminating contamination by drilling fluid additives.
An auger head uses... - ANSWER-... tungsten faced forged steel teeth.
Contamination from the cement grout leaking into the filter pack may be indicated by... -
ANSWER-... high pH.
Daily inspection of drilling equipment should include, but is not limited to... - ANSWER-
Inspection of cable, hoses, etc.
All fluid levels
First aid kit available
Different types of knock-out plugs are used when reaming holes. Which type is not
generally used? - ANSWER-Flat low carbon steel.
Doubling the inside diameter of casing in a well will increase its cross sectional area
by... - ANSWER-... 4 times.
, Due to the advanced technology, today's monitoring equipment and material... -
ANSWER-...
Federal Motor Carrier safety regulations require the driver of a CMV of 10,001 lbs.
combined weight or over to have... - ANSWER-... a medical card and valid driver's
license.
For drilling operations at a hazardous waste site, the exclusion zone is... - 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.
Glacial drift is defined as... - ANSWER-Unconsolidated sediment transported by glaciers
and disposed and deposited directly on land or sea.
Hollow-stem auger drill rigs have many components which make up the drill rig. Which
items are not generally part of the package? - ANSWER-Down the hole hammer and
float sub.
Hollow-stem augers are commonly used to install wells because... - ANSWER-... soil
sampling is easy and accurate in most cases.
How far can a well screen section be moved vertically after a filter pack and bentonite
seal have been placed? - ANSWER-The length of the filter pack above the screen.
If decontamination procedures are not followed, what piece(s) of drill equipment is (are)
most likely to contaminate a well? - ANSWER-1. Drill rods.
2. Augers.
3. Samplers.
In order to establish project expectations, the drilling contractor should... - ANSWER-1.
Request and review the statement of work.
2. Discuss project specifics with the project manager.
3. Outline the statement of work with the drill crew.
In selecting a fluid for a well, the following consideration should be given. - ANSWER-
Fluid should be selected on the basis of the circumstances of each individual well.
Monitoring wells are commonly installed... - ANSWER-... downgradient of a landfill to
determine ground water contamination.
Monitoring wells used to sample ground water should always be... - ANSWER-1.
Installed with great care to avoid contamination from the drilling process
2. Installed to protect the well from surface pollution.
3. Protected with secure well protective covers.
