Lead Inspector/Risk Assessor exam 2023 with 100% correct answers

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. 6 substrates Brick, concrete, drywall, metal, plaster, and wood What is Badge/Ring/badge? How often send to lab? What type of exposure does it measure? Warn to measure radiation exposure. Recommended every 3 months to send into the lab to monitor exposure This measures chronic exposure NOT acute exposure Substrate material underneath paint Room equivalent not always just a room, can be a house exterior, foyer, staircase, hallway, kitchen, etc. Building component type doors, windows, walls, and so on that are repeated in more than one room equivalent in a unit and have a common substrate