Risk Assessor Study Guide 2023 CORRECT QUESTIONS AND ANSWERS

Risk Assessor Study Guide 2023 CORRECT QUESTIONS AND ANSWERS How much lead must be in the paint to be considered contaminated? - greater than or equal to 1.0 mg/cm2 or 0.5% by weight What did Title X do? - -Shifted the federal government's focus from LBP to LBP hazards -mandated action by many branches of federal govt to reduce lead hazards in housing Why was lead used in paint? - -added pigment -durability -helps paint dry faster -kills mold -blocks sound How do children most often come in contact with LBP? - Through hand-to-mouth activities with lead contaminated soil and surface dust What year was LBP effectively banned in all residential homes? - 1978 LBP inspectors are required to _______. - -identify the LBP surfaces in housing -certify the results of the inspection in writing -sample for the presence of lead in dust and soil for the purposes of abatement clearance testing What caused a large decrease in lead contaminated air? - The phase-down of lead within gasoline Who was the first to write about the potential dangers of lead exposure? - Ben Franklin in 1786 What 3 systems of the body are most affected by lead exposure? - -central and peripheral nervous system -cardiovascular system -kidneys Which groups of children are disproportionately exposed to higher amounts of lead? - -poor -Mexican-American -non-Hispanic black -living in a metropolitan area -living in older housing Where is lead stored in the body for the most time? - Bones and teeth; 95% of where lead is stored; half life = 25 years Define chronic lead exposure. - Exposure to low to moderate levels of lead over a long period of time. What blood lead level is considered the level of concern in children? - 5 ug/dL What is the best initial measurement for evaluating lead exposure in the body? - blood lead level What is the lead absorption rate in pregnant women and children? - 50% What are ways to prevent lead poisoning? - -abatement -using safe work practices -eating a balanced diet What is the first step in the treatment of suspected lead poisoning? - removing the person from further exposure to the lead What are the medications used for treating lead poisoning known as? - chelating agents When was Title X created? - 1992 What does Title X define LBP hazards as? - any condition that causes exposure to lead from lead-contaminated dust, soil, or paint that is deteriorated or present on accessible, friction, or impact surfaces that would result in adverse human health effects established by the appropriate Federal agency Where does the "lead based paint free" exemption apply? - in target housing that is being rented How often does Texas require a refresher to stay certified as an inspector? - every 2 years (others are every 3 years) What is a clearance level? - Values that indicate the max amount of lead allowed in dust on a surface following completion of a abatement activity. What is considered a child occupied facility? - a building or part of a building that was constructed before 1978 that is visited regularly by the same child, 6 y.o. or younger, at least 2 days a week for at least 3 hours a day, 60 hours a year. (day-care center, preschool, kindergarten classroom) Define: Inspection - a surface-by-surface investigation by a certified lead inspector/risk assessor to determine the presence of LBP including a written report explaining the results of the investigation. What conditions follow composite dust sampling? - - composite dust samples shall consist of at least two subsamples - every component that is being tested shall be included in the sampling - shall NOT consist of subsamples from more than one type of component What are the two types of errors that are possible in LBP testing? - - false negative - false positive What are the 2 types XRF's? - - direct reader - spectrum analyzer What are 2 radioactive materials that are used in XRF's? - - cobalt-57 isotope - cadmium-109 isotope The degree of damage suffered by an individual exposed to ionizing radiation is a function of which factors? - - type of radiation involved - chemical form of the radiation - distance from the source - energy - duration of exposure What is the main source of radiation that humans are exposed to? - natural background radiation (radon gas, naturally occurring radioactive elements, cosmic radiation from the sun and outer space) (about 300 mrem/year) What 3 factors affect your exposure to radiation? - - time - distance - shielding What is us