EPA RISK ASSESSOR QUESTIONS WITH CORRECT ANSWERS {VERIFIED}

At which of the following ages are children in the most danger of lead exposure and the health effects from that exposure? - 1-3 years of age Lead may be absorbed through the intestines after it is ingested. What is the effect on the absorption of lead when people don't eat properly? - More lead is absorbed Which of the following is a major source of lead exposure for infants and children? - Lead contaminated surface dust and soil. For children that are exposed to low levels of lead, which of the following body systems is most affected? - The central nervous system Dust sampling during a Risk Assessment may include all of the following except: - The top step leading to the front door of the house. Where is lead stored in the body for the longest period of time? - in the bones Which of the following is an example of a structural defect that can cause paint failure? - Leaking roof Which of the following is an example of a substrate defect that can cause paint failure? - Plaster that has separated from wood lath Which of the following is an example of a finish defect that can cause paint failure? - Grease on a kitchen wall When should a risk assessor avoid recommending interim controls as a hazard control option? - When the substrate or component is defective. Which activity is most likely to cause lead levels in the air to exceed the PEL? - Heat guns operating at temperatures greater than 1100° When does a risk assessor perform air sampling? - Never during a risk assessment. Which of the following abatement options is most likely to cause a dangerous lead exposure to lead abatement workers? - Paint removal What is the best way to reduce lead hazards in the home? - Use a combination of interim controls or removal, replacement, encapsulation, and/or enclosure of lead-based paint. Which of the following methods is best for cleaning-up lead dust? - HEPA vacuuming and tri-sodium phosphate cleaning cycles. Which of the following types of environmental sampling is optional in a complete risk assessment? - water When sampling multi-family housing, what information is used to select the "worst case" units? - Visual assessment during a walkthrough of every unit. According to the EPA/HUD, what are considered acceptable levels of lead in soil for play areas? - Lead concentrations less than 400 ppm. When is a lead hazard screen most appropriate? - Housing in good physical condition. If some painted surfaces are not sampled during a risk assessment, which of the following is true. - Paint should be considered lead-based paint until tested. Bare soil along the "drip line" with lead at 2,000 ppm can be treated by: - Covering the bare soil with mulch, sod, or gravel. If a composite paint chip sample is made of four sub-samples, what is considered the critical level of lead in the sample as expressed in ppm? - 1250 ppm What is the maximum number of paint chips that can be included in a composite, paint chip sample? - 5