HUD Ch. 5 Risk Assessment

Question 1

Is water sampling recommended for routine risk assessments?

Answer 1

No - EPA has another program in this area

Question 2

This procedure:

• Governs the collection, handling, storage, testing, and disposition of evidence;
• Safeguards against tampering with or substitution of evidence; and
• Documents that these steps have been carried out.

Answer 2

Chain of Custody

Question 3

OSHA PEL Action Level for Lead

Answer 3

30 micrograms/m3 over 8 hr TWA

Question 4

OSHA PEL for 8 hr work period

Answer 4

50 micrograms/m3 over 8 hr TWA

Question 5

For shifts over 8 hours, PEL is reduced by the following equation

Answer 5

PEL= 400 / hrs worked

Question 6

NIOSH minimum/maximum volume for air sampling

Answer 6

MIN 200L at .05mg/m3 - MAX 1200 L

Question 7

For air sampling, provide _____ to ______ field blanks per set

Answer 7

2-10

Question 8

Types of evaluations for lead:

Answer 8

• Lead hazard screen risk assessment
• Risk assessment
• Paint inspection
• Combination risk assessment/paint inspection
• No hazard evaluation
• Investigation of a house having a child with elevated blood lead level

Question 9

Bypassing an evaluation process can result in expensive correction of nonexistent hazards, and even worse, the failure to _______

Answer 9

Correct undetected problems

All painted surfaces must be assumed to contain lead-based paint

Question 10

Risk assessments determine ________

Answer 10

the presence or absence of lead-based paint hazards

• Identify the existence, nature, severity, source, and location of lead-based paint hazards
• Present the various options for controlling lead hazards in the event hazards are found, including interim controls, abatement measures, and any recommended changes to the management and maintenance systems

Question 11

A lead screen risk assessment is acceptable when _______

Answer 11

the probability of finding lead-based paint hazards is low

• Employs more limited sampling and more sensitive hazard identification criteria
• If a screen indicates that lead hazards may be present, the owner should have a full risk assessment performed

Question 12

Paint Inspection

Answer 12

-Determine whether lead-based paint is present, and if so, which components contain lead-based paint.
Measure the concentration of lead in paint on a surface by surface basis.
Enable owner to manage lead-based paint, since exact locations of lead-based paint have been identified

Question 13

Steps of a Risk Screen Assessment

Answer 13

1. Determine whether dwelling is in good condition (complete form 5.1)
2. If assessor observes painted surfaces in poor condition, XRF should be used or paint samples taken
3. Take 2 composite dust samples from (from floor and window trough in child play area, child room, & main entryway)

**No soil samples or water samples required

Question 14

Composite Paint Standard =

Answer 14

Paint standard (mg/cm2 or micrograms/g) divided by # of subsamples

Question 15

Risk Assessment Process:

Answer 15

1. Collect info about the property from owner
   (Resident use info, where child plays, management & maintenance practices and occupancy status of bldgs)
2. Visual assessment of target dwelling
3. Collection of environmental samples (deteriorated paint, dust, soil)
4. Send samples to lab
5. Review results and draft report to identify:
   -lead-based paint hazards
   -acceptable lead hazard control options (interim controls to full abatement)
   -cost estimates for each option

*Use if bldg near end of life, for interim controls, sale of property, insurance

Question 16

Risk Assessments should not be used for an investigation of a dwelling housing a child with _____

Answer 16

Elevated blood lead level

Question 17

Intact Building Component

Answer 17

entire surface is intact

Question 18

Fair Condition of Building Component

Answer 18

Interior with large SA: = 2 sq ft.
Exterior with large SA: = 10 sq ft.
Interior & exterior with small SA: = 10% of the total SA

Question 19

Poor Condition of Building Component

Answer 19

Interior with large SA: >2 sq ft.
Exterior with large SA: >10 sq ft.
Int. & ext. with small SA: >10% of total SA

Question 20

Dust samples may be collected using:

Answer 20

• Wet wipe ( no thick diaper wipes)OR

- Special Vacuum (no current sampling standard)

Question 21

Window sills and troughs should be sampled

Answer 21

Separately

Question 22

Composite wipe sampling (if used)

Answer 22

• Must have at least 3 separate subsamples (floor, interior sill, and window trough)
• 4th subsample needed if there is wall to wall carpet
• No more than 4 different wipes should be inserted into one container
• Separate composite samples are required from carpeted and hard surfaces
• Sample areas should be same size

Question 23

Single-Surface Dust Sampling

Answer 23

• At least 6-8 dust samples necessary (entryway including porch, kid play area, kid bedroom, kitchen, bathroom)
• Within rooms, sample:
  
  • Floors near friction or impact spots
  • Interior window sills
  • Window troughs

Question 24

Multi-family housing sampling

Answer 24

• Targeted (select dwellings most likely to contain lead-based paint hazards based on info supplied by owner, reduces cost of assessment & unlikely to miss significant lead hazards)
• Worst Case (requires walk-through survey of all dwellings to select highest-risk dwellings based on visual evidence) Not practical, hard to gain access to all dwellings
• Random : used to develop more expensive long-term hazard control measures (Table 5.6 indicates # of units to be sampled)