EPA Risk Assessor Exam With Comp lete Solution At which of the following ages are children in the most danger of lead exposure and the health effects from that exposure? - Answer 1-3 years of age Lead may be absorbed through the intestines after it is ingested. What is the eff ect on the absorption of lead when people don't eat properly? - Answer More lead is absorbed Which of the following is a major source of lead exposure for infants and children? - Answer Lead contaminated surface dust and soil. For children that are exposed to low levels of lead, which of the following body syste ms is most affected? - Answer The central nervous system Dust sampling during a Risk Assessment may include all of the following except: - Answer The top step leading to the front door of the house. Where is lead stored in the body for the longest period of time? - Answer in the bones Which of the following is an example of a structural defect that can cause paint failure? - Answer Leaking roof Which of the following is an example of a substrate defect that can cau se paint failure? - Answer Plaster that has separated from wood lath Which of the following is an example of a finish defect that can cause pain t failure? - Answer Grease on a kitchen wall When should a risk assessor avoid recommending interim controls as a hazard control option? - Answer When the substrate or component is defective. Which activity is most likely to cause lead levels in the air to exceed the PEL? - An swer Heat guns operating at temperatures greater than 1100° When does a risk assessor perform air sampling? - Answer Never during a risk assessment. Which of the following abatement options is most likely to cause a dangerou s lead exposure to lead abatement workers? - Answer Paint removal What is the best way to reduce lead hazards in the home? - Answer Use a comb ination 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? - Answe r HEP A vacuuming and tri-sodium phosphate cleaning cycles. Which of the following types of environmental sampling is optional in a complete risk assessment? - Answer water When sampling multi-family housing, what information is used to select the "worst ca se" units? - Answer 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? - Answer Lead concentrations less than 400 ppm. When is a lead hazard screen most appropriate? - Answer Housing in good physical condition. If some painted surfaces are not sampled during a risk assessment, which of the following is true. - Answer 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: - Answe r Covering the bare soil with mulch, sod, or gravel. If a composite paint chip sample is made of four sub-samples, what is considered th e critical level of lead in the sample as expressed in ppm? - Answer 1250 ppm What is the maximum number of paint chips that can be included in a compo site, paint chip sample? - Answer 5 Which of the following information is not useful for risk assessments - Answer Geographical location of the property A Risk Assessment may include the following questions to the residents except - Answer Where do they go to Church? What is the maximum number of dust wipes that can be included in a composit e dust wipe sample? - Answer 4 Interim controls may include all of the following except: - Answer Removal and replacement of windows
based paint. Which of the following methods is best for cleaning-up lead dust? - Answe r HEP A vacuuming and tri-sodium phosphate cleaning cycles. Which of the following types of environmental sampling is optional in a complete risk assessment? - Answer water When sampling multi-family housing, what information is used to select the "worst ca se" units? - Answer 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? - Answer Lead concentrations less than 400 ppm. When is a lead hazard screen most appropriate? - Answer Housing in good physical condition. If some painted surfaces are not sampled during a risk assessment, which of the following is true. - Answer 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: - Answe r Covering the bare soil with mulch, sod, or gravel. If a composite paint chip sample is made of four sub-samples, what is considered th e critical level of lead in the sample as expressed in ppm? - Answer 1250 ppm What is the maximum number of paint chips that can be included in a compo site, paint chip sample? - Answer 5 Which of the following information is not useful for risk assessments - Answer Geographical location of the property A Risk Assessment may include the following questions to the residents except - Answer Where do they go to Church? What is the maximum number of dust wipes that can be included in a composit e dust wipe sample? - Answer 4 Interim controls may include all of the following except: - Answer Removal and replacement of windows
