EPA RISK ASSESSOR TEST EVALUATION 2025/2026
QUESTIONS WITH SOLUTIONS GRADED A+
✔✔when lead dust levels are needed in a specific location - ✔✔When to use single
wipe sampling?
✔✔Advantages:
-lower cost per sample
-increased surface area per wipe
Disadvantages:
-lead dust in a specific location info is lost
-labs must adopt special prep procedures - ✔✔advantages and disadvantages of
composite wipe sampling: 2 each
✔✔at least 6-8 per dwelling - ✔✔how many single wipe samples should be collected per
dwelling?
✔✔floors = <10ug/ft2
sills = <100ug/ft2
troughs = <100ug/ft2 - ✔✔HUD clearance levels for floor, sills, troughs:
✔✔-main child play room
-kitchen
-bedroom of youngest child over 6 months
-bedroom of next oldest child - ✔✔Rooms to sample when composite wipe sampling at
a minimum: 4
✔✔3-10 subsamples per composite collected roughly along a straight line - ✔✔Number
of sub-samples per soil composite sample?
✔✔at least 2 samples - ✔✔how many composite soil samples are needed?
✔✔A2LA - American Association for Laboratory Accreditation
AIHA - American Industrial Hygiene Association - ✔✔Labs used by risk assessors must
be certified by one of these two agencies:
✔✔At least 6 hours, best time to sample is first thing in the morning - ✔✔How long
should water sit motionless before being sampled?
✔✔False. (>2 ft2 is poor condition) - ✔✔T/F: Interior wall has >3 ft2 of deteriorated
paint. This is classified as fair condition.
, ✔✔False. (<10% is fair condition for components) - ✔✔T/F: 8% of a window sill in the
living room is deteriorated. This is classified as poor condition.
✔✔False, only bare soil is required to be sampled - ✔✔T/F: Soil covered in dense grass
and vegetation can be a lead based hazard?
✔✔False, dust is the strongest predictor for child blood lead level - ✔✔T/F: Dust lead
levels are the weakest predictor of children's BLL compared to other variables.
✔✔No, the acceptable recovery rate is 80% - 120% - ✔✔If a dust wipe has a recovery
rate of 65% is it acceptable to use?
✔✔25 ug/ft2 - ✔✔HUD Clearance level for dust samples collected for a lead hazard
screen for floors is...
✔✔125 ug/ft2 - ✔✔HUD Clearance level dust samples collected for a lead hazard
screen on window sills is...
✔✔-building history
-painting history
-maintenance and management history
-similar construction - ✔✔similar dwellings have common:
✔✔10 units or 20% - ✔✔What is minimum # of dwellings to sample when using
targeted/worse case in a multi-family of 23 units?
✔✔19 - ✔✔Minimum # of dwellings to sample in multi-family of 128 units?
(targeted/worse case)
✔✔all units if <5 units - ✔✔Minimum # of dwellings samples in multi-family of 4 units?
(targeted/worse case)
✔✔20 - ✔✔Random Sampling: # of units to sample in multi-family of 25 units?
✔✔60 units - ✔✔Random Sampling: # of units to sample in multi-family of 1,045 units?
✔✔assess each dwelling individually - ✔✔If there are fewer than 5 dwellings and they
do not have similar histories, you should assess...
✔✔after sampling the final dwelling of the day but before decontamination - ✔✔at what
time in the inspection do you collect blank samples?
✔✔between 50ug - 1000ug - ✔✔spike samples contain this range of lead-containing
dust
QUESTIONS WITH SOLUTIONS GRADED A+
✔✔when lead dust levels are needed in a specific location - ✔✔When to use single
wipe sampling?
✔✔Advantages:
-lower cost per sample
-increased surface area per wipe
Disadvantages:
-lead dust in a specific location info is lost
-labs must adopt special prep procedures - ✔✔advantages and disadvantages of
composite wipe sampling: 2 each
✔✔at least 6-8 per dwelling - ✔✔how many single wipe samples should be collected per
dwelling?
✔✔floors = <10ug/ft2
sills = <100ug/ft2
troughs = <100ug/ft2 - ✔✔HUD clearance levels for floor, sills, troughs:
✔✔-main child play room
-kitchen
-bedroom of youngest child over 6 months
-bedroom of next oldest child - ✔✔Rooms to sample when composite wipe sampling at
a minimum: 4
✔✔3-10 subsamples per composite collected roughly along a straight line - ✔✔Number
of sub-samples per soil composite sample?
✔✔at least 2 samples - ✔✔how many composite soil samples are needed?
✔✔A2LA - American Association for Laboratory Accreditation
AIHA - American Industrial Hygiene Association - ✔✔Labs used by risk assessors must
be certified by one of these two agencies:
✔✔At least 6 hours, best time to sample is first thing in the morning - ✔✔How long
should water sit motionless before being sampled?
✔✔False. (>2 ft2 is poor condition) - ✔✔T/F: Interior wall has >3 ft2 of deteriorated
paint. This is classified as fair condition.
, ✔✔False. (<10% is fair condition for components) - ✔✔T/F: 8% of a window sill in the
living room is deteriorated. This is classified as poor condition.
✔✔False, only bare soil is required to be sampled - ✔✔T/F: Soil covered in dense grass
and vegetation can be a lead based hazard?
✔✔False, dust is the strongest predictor for child blood lead level - ✔✔T/F: Dust lead
levels are the weakest predictor of children's BLL compared to other variables.
✔✔No, the acceptable recovery rate is 80% - 120% - ✔✔If a dust wipe has a recovery
rate of 65% is it acceptable to use?
✔✔25 ug/ft2 - ✔✔HUD Clearance level for dust samples collected for a lead hazard
screen for floors is...
✔✔125 ug/ft2 - ✔✔HUD Clearance level dust samples collected for a lead hazard
screen on window sills is...
✔✔-building history
-painting history
-maintenance and management history
-similar construction - ✔✔similar dwellings have common:
✔✔10 units or 20% - ✔✔What is minimum # of dwellings to sample when using
targeted/worse case in a multi-family of 23 units?
✔✔19 - ✔✔Minimum # of dwellings to sample in multi-family of 128 units?
(targeted/worse case)
✔✔all units if <5 units - ✔✔Minimum # of dwellings samples in multi-family of 4 units?
(targeted/worse case)
✔✔20 - ✔✔Random Sampling: # of units to sample in multi-family of 25 units?
✔✔60 units - ✔✔Random Sampling: # of units to sample in multi-family of 1,045 units?
✔✔assess each dwelling individually - ✔✔If there are fewer than 5 dwellings and they
do not have similar histories, you should assess...
✔✔after sampling the final dwelling of the day but before decontamination - ✔✔at what
time in the inspection do you collect blank samples?
✔✔between 50ug - 1000ug - ✔✔spike samples contain this range of lead-containing
dust
