NJ RADON MEASUREMENT
TECHNICIAN EXAM
________ out of every ________ homes is expected to have elevated radon
levels. - ANSWERS-1 out of every 15
If first short-term test is 2 x the EPA action level of 4.0 pCi/L you should... -
ANSWERS-take a second short-term test immediately
If average of first and second short-term test is above EPA action level of 4.0
pCi/L you should... - ANSWERS-consider mitigation
Average indoor radon level is estimated to be approximately ____________ -
ANSWERS-1.3 pCi/L
Average outdoor radon level is estimated to be approximately _____________ -
ANSWERS-0.4 pCi/L
Most homes can be lowered to ___ pCi/L - ANSWERS-2
Two types of water supply treatments for radon in well water: - ANSWERS-1.
Point of Entry Device: device at where water enters house (best)
2. Point of Use Device: at faucets (not as effective)
You should retest your home every __________ - ANSWERS-2 years
,Radon measurement devices should not be within ___________ of other objects
or measurement devices. - ANSWERS-4 inches
The EPA action level for radon in pCi/L is 4, what is the action level in WL -
ANSWERS-0.02 WL
Most stable radon levels occur during _____________ and ______________ -
ANSWERS-late fall and early spring
Radon testing should not be performed in these (9) locations in a home: -
ANSWERS-1. Bathrooms
2. Kitchens
3. Closets
4. Furnace Rooms
5. Garages
6. Crawl Spaces
7. Hallways
8. Stairways
9. Laundry Rooms
How long do Licensed Radon Professionals keep testing records? - ANSWERS-
minimum of 5 years
recommended permanent record retention
Calibration Measurements - ANSWERS-samples collected or measurements
made in a known radon environment, such as a calibration chamber
, Known Exposure Measurements/ Spiked Samples - ANSWERS-consist of
detectors that have been exposed to known concentrations in a radon calibration
chamber. Used to monitor the accuracy of the entire measurement system.
Quality System - ANSWERS-The organized structure, responsibilities
procedures, processes and resources needed for implementing quality
management.
Quality Management - ANSWERS-Includes defining roles and responsibilities,
planning the level of quality provided to the customer, clearly defining
objectives for quality and defining accountability and reporting.
Precision - ANSWERS-Having a set of data which is tightly grouped together.
Bias - ANSWERS-Average location of the results in relation to the target.
Accuracy - ANSWERS-Occurs when both precision and bias are high.
The first kind of quality control measure. Used to assess the precision (how
tightly grouped results are) of devices and processes. Two or more devices used
in the same place simultaneously. - ANSWERS-Duplicates
What does it mean for a radon decay product to be "plated out"? - ANSWERS-It
has attached to a non-breathable object
If a radon decay product attaches to a solid object, such as a wall, it... -
ANSWERS-...can no longer be inhaled.
TECHNICIAN EXAM
________ out of every ________ homes is expected to have elevated radon
levels. - ANSWERS-1 out of every 15
If first short-term test is 2 x the EPA action level of 4.0 pCi/L you should... -
ANSWERS-take a second short-term test immediately
If average of first and second short-term test is above EPA action level of 4.0
pCi/L you should... - ANSWERS-consider mitigation
Average indoor radon level is estimated to be approximately ____________ -
ANSWERS-1.3 pCi/L
Average outdoor radon level is estimated to be approximately _____________ -
ANSWERS-0.4 pCi/L
Most homes can be lowered to ___ pCi/L - ANSWERS-2
Two types of water supply treatments for radon in well water: - ANSWERS-1.
Point of Entry Device: device at where water enters house (best)
2. Point of Use Device: at faucets (not as effective)
You should retest your home every __________ - ANSWERS-2 years
,Radon measurement devices should not be within ___________ of other objects
or measurement devices. - ANSWERS-4 inches
The EPA action level for radon in pCi/L is 4, what is the action level in WL -
ANSWERS-0.02 WL
Most stable radon levels occur during _____________ and ______________ -
ANSWERS-late fall and early spring
Radon testing should not be performed in these (9) locations in a home: -
ANSWERS-1. Bathrooms
2. Kitchens
3. Closets
4. Furnace Rooms
5. Garages
6. Crawl Spaces
7. Hallways
8. Stairways
9. Laundry Rooms
How long do Licensed Radon Professionals keep testing records? - ANSWERS-
minimum of 5 years
recommended permanent record retention
Calibration Measurements - ANSWERS-samples collected or measurements
made in a known radon environment, such as a calibration chamber
, Known Exposure Measurements/ Spiked Samples - ANSWERS-consist of
detectors that have been exposed to known concentrations in a radon calibration
chamber. Used to monitor the accuracy of the entire measurement system.
Quality System - ANSWERS-The organized structure, responsibilities
procedures, processes and resources needed for implementing quality
management.
Quality Management - ANSWERS-Includes defining roles and responsibilities,
planning the level of quality provided to the customer, clearly defining
objectives for quality and defining accountability and reporting.
Precision - ANSWERS-Having a set of data which is tightly grouped together.
Bias - ANSWERS-Average location of the results in relation to the target.
Accuracy - ANSWERS-Occurs when both precision and bias are high.
The first kind of quality control measure. Used to assess the precision (how
tightly grouped results are) of devices and processes. Two or more devices used
in the same place simultaneously. - ANSWERS-Duplicates
What does it mean for a radon decay product to be "plated out"? - ANSWERS-It
has attached to a non-breathable object
If a radon decay product attaches to a solid object, such as a wall, it... -
ANSWERS-...can no longer be inhaled.
