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2024 WI Lead Risk Assessor Exam Questions and Answers
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2024 WI Lead Risk Assessor Exam
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2024 WI Lead Risk Assessor ExamEPA and WI DHS Lead Based Paint Definition - answer≥0.5%
≥1.0 mg/cm2
Nationally houses built before 1978_______ have lead based pain - answer75%
XRF - answerX-ray fluorescence
Factors that should be considered for XRF: - answer- Substrate Correction
- inconclusive range
- measuring K & L shell reading
What year was lead based paint banned? - answer1978
Only _______ areas that are in the scope of work from the contractor - answer testing
areas
Sampling requirements for Inside a home - answer Visual inspection
Less than 4 rooms = sampling all rooms
More than 4 rooms = minimum of four rooms sampled
Each room should have sampled: Floor Alternate between the tough and window sill
_______% confident for room amount with big complexes, with lots of rooms -
answer95%
Wait how long after any cleanup has been done - answeran hour
Sampling requirements for outside a home - answer-Have to do a visual inspection.
-Doesn't specify dust wipe sampling outside
-No requirements to have porch floor dust wiped - HUD requires it for particular projects
so it is expected to be done
-Soil Samples
Sampling requirements for soil samples (and max levels) - answer3-10 composite
samples in drip line
400 ppm is the threshold for children areas
1200 ppm for all other areas
HUD paint chip recommended size - answerRecommended HUD paint chip size is 2" X
2"
, What type of investigations can Lead risk assessor do - answer- clearances
- full inspection
- lead partial inspection
- lead-free inspections
- EBL
- Hazard Screening
- Lead-safe Investigations
How often should a leak/wipe test be done, and why? - answerevery 6 months - this
checks to see if there are leaks in the radioactive source shield
How often should you calibrate the XRF machine? - answerAt the beginning, every
fours, and at the end
NIST - answer(National Institute of Standards and Technology)
Set the SRM
Performance Characteristic Sheet (PCS) - answerProvides important information on
how to use the specific XRF
SRM - answer(Standard Reference Material) closest to 1.0 mg/cm2 and used to
calibrate the machine
Should have calibration range (first and second reading) between 0.8 - 1.2 mg/cm2 (+/-
0.2 mg/cm2) for Heuresis model. Each model is different. If out of range then should not
use the samples taken.
substrate bias/correction - answerwhat's below the paint
Newer machines do not need to substrate correction
Take apparent lead concentration (APL) - substrate equivalent lead (SEL) = corrected
lead concentration
APL - SEL = corrected lead concentration
Older machines would have inconclusive ranges for certain substrates (in PCS). If your
sample falls in between the inconclusive range then you will have to take a paint chip
sample, or assume it is lead paint.
6 substrates - answerBrick, concrete, drywall, metal, plaster, and wood
What is Badge/Ring/badge? How often send to lab? What type of exposure does it
measure? - answerWarn to measure radiation exposure.
Recommended every 3 months to send into the lab to monitor exposure
This measures chronic exposure NOT acute exposure
Substrate - answermaterial underneath paint
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