2024 WI Lead Risk Assessor Exam
1. What constitutes lead-based paint according to the EPA and WI DHS? - Answer: Lead-based paint is defined as paint containing levels equal to or greater than 0.5% by
weight or 1.0 mg/cm².
2. What percentage of houses built before 1978 are known to contain le...
1. What constitutes lead-based paint according to the EPA and WI DHS?
- Answer: Lead-based paint is defined as paint containing levels equal to or greater than 0.5% by
weight or 1.0 mg/cm².
2. What percentage of houses built before 1978 are known to contain lead-based paint?
- Answer: Approximately 75% of houses constructed prior to 1978 contain lead-based paint.
3. What does XRF stand for?
- Answer: XRF stands for X-ray fluorescence.
4. What factors should be taken into account when using an XRF?
- Answer: Factors to consider include substrate correction, inconclusive ranges, and measurements of
the K and L shell readings.
5. In what year was lead-based paint banned in the United States?
- Answer: Lead-based paint was banned in 1978.
6. What specific areas are included in a contractor's scope of work regarding lead?
- Answer: The contractor's scope of work includes only the testing areas.
7. What are the sampling requirements for testing inside a residential home?
- Answer:
- Conduct a visual inspection.
- For fewer than four rooms, sample all rooms.
- For more than four rooms, sample at least four rooms.
- Sampling in each room should include the floor and alternately the tough (or high surfaces) and
window sills.
, 8. What level of confidence should be aimed for when sampling rooms in larger complexes?
- Answer: A 95% confidence level is recommended for sampling in larger complexes.
9. How long should you wait after cleanup before conducting further sampling?
- Answer: It is advised to wait one hour after any cleanup activities.
10. What are the sampling requirements for outside a home?
- Answer:
- A visual inspection must be performed.
- Dust wipe sampling is not specifically required for the outside, but it may be expected under certain
HUD projects.
- Soil samples should be collected.
11. What are the parameters and maximum lead thresholds for soil samples?
- Answer: Take 3-10 composite samples in the drip line. The maximum allowed lead concentration is
400 ppm in areas frequented by children and 1,200 ppm for all other areas.
12. What is the recommended size for paint chips as per HUD guidelines?
- Answer: The suggested paint chip size is 2" x 2".
13. What types of investigations can a lead risk assessor conduct?
- Answer: Investigations can include:
- Clearances
- Full inspections
- Partial lead inspections
- Lead-free inspections
- Elevated Blood Lead (EBL) assessments
- Hazard screenings
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