EPA Lead Risk Assessor Exam Study Guide Exam Questions Latest 2024 RATED A+, Exams of Health sciences

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What Federal document serves as an overall guideline for performing inspections, risk assessments, and abatement activities? - correct answer ✅HUD Guidelines. A child may be treated for lead poisoning by using... - correct answer ✅chelation therapy. The purpose of a lead risk assessment is to? - correct answer ✅Identify LBP hazards. What does EBL mean? - correct answer ✅Elevated Blood Level How does lead primarily enter children's bodies? - correct answer ✅Ingestion of lead dust. Would a child with consecutive blood lead tests of 17 ug/dl, 9 ug/dl, and 16 ug/dl be considered to be lead poisoned? - correct answer ✅No, the elevated blood levels of 17ug/dL and 16ug/dL were not consecutive. Which is more useful for the renovation contractor, the lead inspection or the risk assessment? - correct answer ✅Lead Inspection. What six sampling methods do Risk Assessors use to identify lead hazards? - correct answer ✅Visual Dust Soil Paint Chip

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XRF

Water A certified Risk Assessor may conduct a Risk assessment on a property which is to be abated by the firm for which they work, if they... - correct answer ✅Notify the client in writing What is the OSHA Action Level for lead? - correct answer ✅30 ug/m3. Water sampling as part of a Risk Assessment is: Mandatory, Optional, or Never included? - correct answer ✅Optional What are the six LBP hazards defined by EPA? - correct answer ✅Dust Friction Surface Impact Surface Chewable Surface Deteriorated Paint

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Soil EPA Soil lead hazard in general yard area - correct answer ✅1,200 ppm XRF analysis is the most common method for determining LBP - correct answer ✅True XRF analysis is the most common method for determining lead hazards - correct answer ✅False, XRF is most commonly used to determine LBP but not hazards Where would you find operational data for an XRF? - correct answer ✅Performance Characteristic Sheet (PCS) supplied with the XRF How many dust samples are usually taken for a Risk Assessment? - correct answer ✅ 13 What are the three forms of lead abatement? - correct answer ✅Removal Enclosure

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Encapsulation How do you calibrate an XRF? - correct answer ✅3 shots on the 1. standard How often do you calibrate an XRF? - correct answer ✅Beginning End Every 4 hours Every time the device is powered down LBP per XRF - correct answer ✅Equal to or greater than 1.0 mg/cm LBP % level by paint chip analysis - correct answer ✅Greater than 0.5% by weight EPA Floor clearance/hazard level - correct answer ✅40 ug/ft EPA Window sill or stool clearance/hazard level - correct answer ✅250 ug/ft

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EPA Window trough or well clearance/hazard level - correct answer ✅ 400 ug/ft OSHA lead PEL - correct answer ✅50 ug/m OSHA lead Action Level - correct answer ✅30 ug/m EPA Soil play area/vegetable garden clearance/hazard level - correct answer ✅400 ppm EPA Soil other parts of yard clearance/hazard level - correct answer ✅1, ppm HUD required Level for soil abatement - correct answer ✅5,000 ppm EPA action level criteria for lead in drinking water - correct answer ✅greater than 15 ppb or 15ug/l or 0.015mg/l

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Lead blood Level requiring investigation in children - correct answer ✅ 5 ug/dL Lead poisoned criteria - correct answer ✅A single LBL reading above 20 ug/dL or two consecutive readings between 15-19 ug/dL. (Consecutive readings must be taken at least 3 months apart) OSHA medical removal level for lead in adult worker blood -same as PEL - correct answer ✅50 ug/dL OSHA back to work level for lead in adult worker blood - correct answer ✅ 40 ug/dL What is considered Target Housing? - correct answer ✅Any houses built before 1978 except: Housing designated for elderly Designated housing for adult disabled

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Zero bedroom units (except a child under age 6) Vacant houses awaiting demolition What is a Child Occupied Facility? - correct answer ✅ANY building, or portion of building: Built before 1978; Visited by the same child who is less than 6 years old; On 2 separate days per week; For at least 3 hours per visit; For a total of 60 hours total per year Surface area criteria where EPA regulations do not apply? - correct answer ✅Disturbed surfaces are less than: 20 sq. ft. for exterior surfaces 2 sq. ft. per room for interior surfaces 10% of surface area on any small component surface Protection Factor of a 1/2 face NPR, lead concentrations of? - correct answer ✅ 10

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up to 500 ug/m Protection Factor of a full-face NPR, lead concentrations of? - correct answer ✅ 50 up to 2,500 ug/m Protect Factor of a PAPR, lead concentrations of? - correct answer ✅ 100 up to 5,000 ug/m OSHA respirator requirements - correct answer ✅Written program Respirator training Fit test Annual physical Fit check Protection Factor of SCBA, lead concentrations of? - correct answer ✅1, up to 50,000 ug/m

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Lead-Safe Work Practices - correct answer ✅1. Minimize or eliminate generation of dust/debris

2. Contain dust/debris in regulated work area
3. Collect debris on disposable sheeting
4. Clean using wet methods and a HEPA vacuum Name three forms of lead abatement - correct answer ✅Removal Enclosure Encapsulation How long must lead abatement last? - correct answer ✅20 years When diagraming a house for a Risk assessment, the "A" side is the? - correct answer ✅Address side Who can conduct lead inspections in target housing and child occupied facilities? - correct answer ✅Lead inspectors and risk assessors

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What is the purpose of lead inspections? - correct answer ✅To identify the presence and locations of LBP What year was LBP banned for residential use properties? - correct answer ✅ 1978 The symptoms of lead poisoning are most often misdiagnosed as? - correct answer ✅Flu symptoms What are the two categories of lead hazards in a risk assessment? - correct answer ✅Material hazard and surface hazard What conditions are necessary to have a chewable surface hazard? - correct answer ✅LBP and human teeth marks What conditions are necessary to have a friction surface hazard? - correct answer ✅LBP, evidence of abrasion, and dust on nearby horizontal surfaces.

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What conditions are necessary to have a impact surface hazard? - correct answer ✅LBP, in contact with another building component, and evidence of damage. What are the three types of criteria a risk assessor can select for assessment of a dwelling? - correct answer ✅1. Targeted

2. Random
3. Worst case What exterior soil areas need to be tested? - correct answer ✅Where bare soil is present:
4. Dripline of house
5. Play areas and vegetable gardens
6. Areas greater than 9 sq. ft. Blank wipe samples should be recollected if they exceed...? - correct answer ✅50 ug/wipe

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How many dust wipe blanks are needed? - correct answer ✅1 for each dwelling unit or 1 blank / 50 samples. Whichever is least how many wipes per composite sample are allowed? - correct answer ✅ 4 per composite sample what is the minimum wipe area for floors? - correct answer ✅Recommended: 1 ft^2 / Minimum = 0.1ft Describe the dust wipe sampling method in steps: 4 - correct answer ✅1. Start at corner with wipe fully opened

2. First pass: side-to-side in s pattern, fold in half
3. Second pass: Top-to-bottom s pattern, fold
4. ASTM Third pass: Wipe around perimeter Paint Conditions for Interior Paint Quality: 3 of them - correct answer ✅Intact: entire surface intact Fair: <=2ft2 damaged Poor: >2ft2 damaged

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2 ways to describe the amount of lead in dust: - correct answer ✅1: Loading

2. mass concentration lead in dust: loading is measured by? - correct answer ✅wipe sampling or vacuum sampling lead in dust: mass concentration is measured by... - correct answer ✅usually measured by vacuum sampling only What does TSCA stand for and what is it relied upon to do? - correct answer ✅Toxic Substance Control Act (TSCA) Relied upon to identify LBP hazards and identify management solutions Acceptable Dust Wipe criteria: 3 - correct answer ✅- does not contain aloe

• yields between 80% - 120% recovery rates
• blank wipes are less than 5 ug/wipe

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composite samples should be collected separately for: - correct answer ✅- different dwellings

• different components
• different locations
• from carpet and hard surfaces When to use single wipe sampling? - correct answer ✅when lead dust levels are needed in a specific location advantages and disadvantages of composite wipe sampling: 2 each - correct answer ✅Advantages: -lower cost per sample -increased surface area per wipe Disadvantages: -lead dust in a specific location info is lost -labs must adopt special prep procedures

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how many single wipe samples should be collected per dwelling? - correct answer ✅at least 6-8 per dwelling HUD clearance levels for floor, sills, troughs: - correct answer ✅floors = <10ug/ft sills = <100ug/ft troughs = <100ug/ft Rooms to sample when composite wipe sampling at a minimum: 4 - correct answer ✅-main child play room -kitchen -bedroom of youngest child over 6 months -bedroom of next oldest child Number of sub-samples per soil composite sample? - correct answer ✅3- subsamples per composite collected roughly along a straight line how many composite soil samples are needed? - correct answer ✅at least 2 samples

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Labs used by risk assessors must be certified by one of these two agencies: - correct answer ✅A2LA - American Association for Laboratory Accreditation AIHA - American Industrial Hygiene Association How long should water sit motionless before being sampled? - correct answer ✅At least 6 hours, best time to sample is first thing in the morning T/F: Interior wall has >3 ft2 of deteriorated paint. This is classified as fair condition. - correct answer ✅False. (>2 ft2 is poor condition) T/F: 8% of a window sill in the living room is deteriorated. This is classified as poor condition. - correct answer ✅False. (<10% is fair condition for components) T/F: Soil covered in dense grass and vegetation can be a lead based hazard? - correct answer ✅False, only bare soil is required to be sampled

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T/F: Dust lead levels are the weakest predictor of children's BLL compared to other variables. - correct answer ✅False, dust is the strongest predictor for child blood lead level If a dust wipe has a recovery rate of 65% is it acceptable to use? - correct answer ✅No, the acceptable recovery rate is 80% - 120% HUD Clearance level for dust samples collected for a lead hazard screen for floors is... - correct answer ✅25 ug/ft HUD Clearance level dust samples collected for a lead hazard screen on window sills is... - correct answer ✅125 ug/ft similar dwellings have common: - correct answer ✅-building history -painting history -maintenance and management history -similar construction

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What is minimum # of dwellings to sample when using targeted/worse case in a multi-family of 23 units? - correct answer ✅10 units or 20% Minimum # of dwellings to sample in multi-family of 128 units? (targeted/worse case) - correct answer ✅ 19 Minimum # of dwellings samples in multi-family of 4 units? (targeted/worse case) - correct answer ✅all units if <5 units Random Sampling: # of units to sample in multi-family of 25 units? - correct answer ✅ 20 Random Sampling: # of units to sample in multi-family of 1,045 units? - correct answer ✅60 units If there are fewer than 5 dwellings and they do not have similar histories, you should assess... - correct answer ✅assess each dwelling individually

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at what time in the inspection do you collect blank samples? - correct answer ✅after sampling the final dwelling of the day but before decontamination spike samples contain this range of lead-containing dust - correct answer ✅between 50ug - 1000ug Paint Conditions for Exterior Paint Quality: 3 of them - correct answer ✅Intact - Entire surface is undamaged Fair - <= 10ft2 damaged Poor - >10ft2 damaged Residential Lead-Based Hazard Reduction Act was enacted in what year? - correct answer ✅In 1992 as Title X of the Housing and Community Development Act What was the purpose of the Title X of the Housing and Community Development Act? - correct answer ✅To regulate and educate home-buyers on the presence of lead paint in U.S. households built before 1978.

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At what lead blood level does a child require chelation therapy? - correct answer ✅At or above 45ug/dL can lead be absorbed through the skin? - correct answer ✅no where does excess lead get stored in the body? - correct answer ✅in bones what are the first organs to be affected by lead ingestion? - correct answer ✅the liver and kidneys can lead cross the placenta to an unborn baby? - correct answer ✅yes The contractor must notify who the results of clearance testing and work performed? - correct answer ✅only the contractors client (whoever hired the abatement crew)

• it's up to the client to notify tenants lead based paint is primarily in this type of paint - correct answer ✅oil paint

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What tool is best to be used for soil sampling? A. A knife B. Tweezers/forceps C. A centrifuge tube D. Gloved hands - correct answer ✅C. A centrifuge tube (coring) What is a newel post? - correct answer ✅A newel post is the supporting post in a staircase's railing How do you make spike samples? - correct answer ✅Spiked samples are manufactured in a laboratory environment

1. If it is necessary to prepare spiked wipe samples, use the same brand of wet wipes that will actually be used in the field.
2. Obtain a NIST Standard Reference Material containing a certified concentration of lead, or a traceable secondary standard with a known amount of lead in dust.

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3. Weigh out between 50 and 500 μg of lead (not total dust) to the nearest microgram.
4. Insert spiked sample randomly into sample set (1 for 50 samples) How many spike samples are needed per # of samples? - correct answer ✅ 1 per 50 samples analyzed What is the purpose of spike samples? - correct answer ✅Spiked samples help show to what extent the laboratory's analytical method is working, and help assess the accuracy of the method and/or the analyst. What is the purpose of blank samples? - correct answer ✅Submitting blank samples is important to test the accuracy of your sampling techniques, the sampling media, and the laboratory's analysis. This can determine if you're sampling techniques are inadequate and contaminating samples. What is the most likely source of lead being brought into the home? A. Parents are landscapers

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B. Battery shop across the street C. Father has a model airplane making hobby D. Mother is an airplane pilot - correct answer ✅B. Battery shop across the street Types of deterioration of lead-based paint you may observe include: - correct answer ✅peeling, chipping, chalking, cracking, damaged, or damp What paint deterioration will likely result in the most lead dust? - correct answer ✅Chalking Common hobbies/tasks that may lead to introducing lead into the home? - correct answer ✅1. Making lead sinkers for fishing

2. Casting your own bullets in the backyard
3. Recycling old car batteries A wipe sample you took came back from the lab with a lead result of 800ppm. What should you do?

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A. This paint is lead-based paint, note in your report and let the client know they have a lead paint in their property. B. Resample the area where you took the sample from. C. Call the lab and tell them they must report the results in mg/cm2 D. This paint is not lead-based paint, note the results in your report and let the client know. - correct answer ✅D. This paint is not lead-based paint, note the results in your report and let the client know. (LBP is greater than 5000ppm) You receive a laboratory analysis that says the lead content of a paint-chip sample you collected contains 1% lead by weight. Is this considered lead- based paint? - correct answer ✅Yes, lead concentrations greater than 0.5% by weight is considered lead-based paint. You receive a laboratory analysis that says the soil composite sample you collected from soil within a play area reported 1,000 ppm. There were 4 sub- samples within your composite sample. Does this exceed the EPA's clearance level? - correct answer ✅No, the EPA clearance level for soil in a play area is 400ppm. The composite sample reported 1,000ppm and there were 4

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subsamples. 1,000/4 = 250ppm per subsample which is below the EPA clearance level. You receive a laboratory analysis that says the soil composite sample you collected from soil reported 8,000ppm. What must you do? A. You are required to abate the soil B. Ask the homeowner what they want to do C. Call the EPA and let them know of the soil concentration immediately. D. Nothing, the soil is not a lead hazard - correct answer ✅A. You are required to abate the soil above 5,000ppm You're XRF shot on a painted wall reports 3.6mg/cm2. Is Is this considered lead-based paint? - correct answer ✅Yes, equal to or greater than 1.0mg/cm2 is lead-based paint What type of radiation does an XRF emit? A. microwave radiation