Appendix A 
G LCD SSARY 
Community based organizations (CBOs): Organizations that interact with a community on a 
regular basis, and can help educate the community on lead dust hazards. 
Deteriorated paint: Any exterior or interior paint that is peeling, chipping, chalking, or crack¬ 
ing, or any other paint located on an interior or exterior surface or fixture that is otherwise 
damaged or separated from the substrate. 
Dosimetry badges: Used to determine radiation levels reaching a person s breathing space. It is 
a small, like a luggage tag, and clips on to a person s clothing, usually around the lapel. 
Dust wipe sample: A sample of lead dust collected from a surface following a specified procedure. 
Friction surface: An interior or exterior surface that is subject to abrasion or friction, including, 
but not limited to, certain window, floor, and stair surfaces. 
Half-life: The amount of time needed for the activity of a radioactive source to decrease by 
one half. 
HEPA vacuum: A High Efficiency Particulate Air (HEPA) vacuum is equipped with an 
enhanced air filtration device that increases the amount of dust captured by the vacuum. 
Impact surface: An interior or exterior surface that is subject to damage by repeated sudden 
force such as certain parts of door frames. 
Interior window sill: The interior ledge of a window; it is the principal area for collecting lead 
dust samples. 
Lead-based paint hazard: Typically results from deteriorated paint and includes lead-based 
paint chips, lead dust, and lead contaminated soil. 
Lead dust hazard: Surface dust in a residential dwelling or child-occupied facility that contains 
a concentration of lead equal to 40 g/ft2 on floors or 250 g/ft2 on interior window sills based 
on dust wipe samples. 
Lead soil hazard: Bare soil on residential property or on property of a child-occupied facility 
that contains total lead equal to or exceeding 400 parts per million (ppm) in a play area, or an 
average of 1,200 ppm of bare soil in the rest of the yard, based on soil samples. 
Lead inspector: An EPA-certified professional who conducts a surface-by-surface investigation 
to determine whether there is lead-based paint in the home and where it is located. Painted sur¬ 
faces are inventoried and tested. Soil, dust, and water are not typically tested but are reserved 
for a risk assessor. 
Paint chip: A piece of dried paint. As paint deteriorates, paint chips tend to collect along the 
floor or the exterior perimeter of a house. 
Play area: An area of frequent contact by children less than age 6 as indicated by, but not lim¬ 
ited to, such factors including the following: the presence of play equipment (e.g., sandboxes, 
7 B 
Appendix A 
