LEAD EXAM| 83 QUESTIONS AND ANSWERS

What are exemptions to Target Housing ? Zero bedroom dwelling units, housing exclusively for the elderly or disabled, housing certified as lead free by an accredited lead inspector, emergencies. How long should water not be used prior to sampling for lead ? 6 hours What is the lead hazard for soil in an area not frequented by children ? 1,200 ppm What is the lead hazard for soil in an area frequented by children ? 400 ppm What is the clearance criteria for utilizing composite sampling ? 1/2 the number of sub samples divided by the clearance criteria What is a multi family dwelling, according to HUD guidelines ? 21 or more units for housing constructed prior to 1960 or of unknown age and 10 or more units for housing constructed between 1960 and 1977 What what standards must wipe samples conform to according to EPA ? E-1792 An inspector collected a wipe sample from a window sill that is 17 inches long and 2.5 inches wide. The lab results for lead was 226 micro grams. How much lead is there in micro grams per square foot. ? 800 um/SF What is the objective of a lead risk assessment ? Discover the existence , nature, severity, and location of a lead hazard and recommend control options to eliminate the hazard. What is the chemical symbol for lead ? Pb What is the melting point of lead ? 621 degrees farenheights What are some of the characteristics for lead ? Soft, high density, blue grey metal. What is pica ? Placing non food items into the mouth. What is target housing. Housing constructed prior to 1978 What is body burden ? Total amount of lead stored into the body. What body systems are affected by lead ? CNS, Blood forming, circulatory, reproductive. What is the CDC's level of concern for lead in a child 5 micro grams /deciliter What is chelation ? The medical treatment to remove metals from the body What is a lead based paint hazard > Any deteriorated lead based paint. What is lead based paint level using an XRF, according to EPA & HUD 1.0 mg/cm 2 What is lead based paint level using an AAS (atomic absorption spectroscopy) according to EPA and HUD ? 0.5 % or 5000 ppm What is the lead hazard criteria for dust on the floor ? 40 micro grams per sq ft What is the lead hazard criteria for dust on the window sill 250 micro grams per square foot What is the lead hazard criteria for dust on the window well ? 400 micro grams per SF. What is the safe drinking water standard for lead from water distribution systems 15 ppb 0.015 mg What is OSHA medical removal limit for lead in a worker 50 ug/dl What is the safe drinking water standard for lead from individual faucets according to HID 2012 guidelines > 20 ppb What is TCLP Toxicity Characteristics Leachate Porcedure What is the criteria for determining waste to be hazardous 5 pp, What is the clearance sampling criteria for lead abatement with a containment, according to EPA ? Minimum 2 dust samples from floor, sills or wells in each containment room (if there are no windows, both samples from floor in opposite parts of room). If more than 4 rooms abated under containment, at least 4 of these containment rooms in the dwelling must be sampled. In addition, a sample should be collected on the floor within 10 ft of the containment entrance. What is the OSHA PEL for 8 hrs ? 50 micro grams per meter cubed What is the clearance sampling criteria for lead abatement without a containment, according to EPA ? minimum two dust samples from floor, sills or well in each 4 rooms If abatement takes place in fewer than 4 rooms, samples must be collected in rooms where abatement took place plus other rooms in the dwelling to make up the 4 rooms minimum. What is the OSHA action level for 8 hrs 30 micro grams per meter cubed How much lead can be in residential paint ? 0.06 percent (600 ppm) according to the consumer product safety commission effective 1/1/78 as of Feb 2011, its 0.009 percent or 90 ppm. When does a work area pass clearance for lead abatement ? when it is visually clean and meets dust sample criteria. What happens when a contractor fails the visual for a lead abatement project ? Re clean the work area. What does a clearance determine ? Work was performed according to the regulation and or specifications. safe for unprotected workers to occupy the area and safe for residents including children under the age of 6 to re-occupy the area. How long does an inspector have to wait prior to performing a clearance ? 1 hour prior to dust sampling How much lead can be solder and flux according to SDWA <0.02% How much lead can be in other plumbing fixtures, according to SDWA ? <0.25% What is abatement ? Control options that permanently eliminates the lead hazard. Consist of 4 options. Removal, repair enclosure and encapsulant. What are the interim controls ? Temporary measures. paint stabilization, removal of friction or impact surfaces, specialized cleaning, education. What is the soil lead level requiring abatement ( as opposed to interim controls) equal to or > 5,000 ppm What is the permissible amount of lead in replacement soil after soil abatement by excavation <400 ppm What are prohibited activities according to EPA and HUD Open flame burning, machine sanding, grinding without HEPA recovery systems, dry scraping except within 1 ft of an electrical outlet, heat gun >1,100 degrees f, volatile chemical treatment in un-ventilated area (Methylene chloride). Besides soil removal and replacement, what other method can be used to abate soil ? Cover with an impermeable surface such as asphalt or concrete If a workers blood lead level is between 40 ug/dl and 50 ug/dl, what is the blood testing schedule according to OSHA ? Blood tested every two months until two consecutive underneath 40 ug/dl What is the blood testing schedule if a worker blood level exceed 50 ug/dl in two weeks another blood test, if over 50 the person in medically removed. Then blood testing every month until two consecutive tests below 40 ug/dl. only then can the worker rerun to the lead job. What is the blood testing schedule for workers exposed tor potentially exposed above the action level ? initial every two month for the first 6 months then every 6 months thereafter. What does 29 CFR 1926.62 regulate Occupational exposure to lead