Lead inspector Latest Update Graded A+

Lead inspector Latest Update Graded A+ AAS Atomic absorption spectrometry AIHA American Industrial Hygiene Association ASTM American Society for testing and materials Biological half life of soft tissue 60-90 days Biological half life in bone 10-30 years Chelation purpose to leach out lead from the body: there's oral and IV. Also pulls other stuff out of the body besides lead. Needed if blood lead level is above 45 if/dL Half life of Cobalt-57 9 months Substrate corrections formula c = (m - 1.02)mg/cm(sq) Substrate correction is NOT needed for measurements greater than or equal to 4.0 mg/cm(sq) CLC = ALC-SEL Corrected lead concentrated = apparent lead concentration - substrate equivalent lead The ALC would have 3 readings, and insert average. Two types of chemical test kits Sodium rhodizonate (will turn red-think r to r) and sodium sulfate/sulfide (will turn black) Abatement methods Removal, replacement, enclosure (don't take wall out, put a wall over it), encapsulation (A special elastomeric paint that has been guaranteed by the fed gov to last 20 yrs) Where do contractors typically fail? Window sills and window troughs (wells) 3 locations to get dust wipe samples Floor, window well (trough) and window sill Heat guns must be less than 1,100 degrees F Our insurance E&O: Errors and Omissions - means you're insured for your opinion Other insurance-general liability - if you break something in someone's house Biological half life 30 days or 25-45 days