WI Lead Risk Assessor Exam 2023
EPA and WI DHS Lead Based Paint Definition -
≥0.5%
≥1.0 mg/cm2
Nationally houses built before 1978 have lead based pain -
75%
XRF -
X-ray fluorescence
Factors that should be considered for XRF: -
- Substrate Correction
- inconclusive range
- measuring K & L shell reading
What year was lead based paint banned? -
1978
Only areas that are in the scope of work from the contractor -
testing areas
Sampling requirements for Inside a home -
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 -
95%
Wait how long after any cleanup has been done -
an hour
Sampling requirements for outside a home -
-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) -
3-10 composite samples in drip line
400 ppm is the threshold for children areas
, 1200 ppm for all other areas
HUD paint chip recommended size -
Recommended HUD paint chip size is 2" X 2"
What type of investigations can Lead risk assessor do -
- 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? -
every 6 months - this checks to see if there are leaks in the radioactive source
shield
How often should you calibrate the XRF machine? -
At the beginning, every fours, and at the end
NIST -
(National Institute of Standards and
Technology) Set the SRM
Performance Characteristic Sheet (PCS) -
Provides important information on how to use the specific XRF
SRM -
(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 -
what'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.
EPA and WI DHS Lead Based Paint Definition -
≥0.5%
≥1.0 mg/cm2
Nationally houses built before 1978 have lead based pain -
75%
XRF -
X-ray fluorescence
Factors that should be considered for XRF: -
- Substrate Correction
- inconclusive range
- measuring K & L shell reading
What year was lead based paint banned? -
1978
Only areas that are in the scope of work from the contractor -
testing areas
Sampling requirements for Inside a home -
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 -
95%
Wait how long after any cleanup has been done -
an hour
Sampling requirements for outside a home -
-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) -
3-10 composite samples in drip line
400 ppm is the threshold for children areas
, 1200 ppm for all other areas
HUD paint chip recommended size -
Recommended HUD paint chip size is 2" X 2"
What type of investigations can Lead risk assessor do -
- 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? -
every 6 months - this checks to see if there are leaks in the radioactive source
shield
How often should you calibrate the XRF machine? -
At the beginning, every fours, and at the end
NIST -
(National Institute of Standards and
Technology) Set the SRM
Performance Characteristic Sheet (PCS) -
Provides important information on how to use the specific XRF
SRM -
(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 -
what'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.
