EP 1110-1-31
31 Aug 01
Random Sampling
A technique for selecting a sample of n elements from a
population of elements in such a way that each combination
of n elements has the same probability of being selected. In
statistical sampling, the process of selecting sample units in
such a way that all units under consideration have the same
probability of being selected. (ASTM E1605)
Rinsate Blank
A sample of "used" cleaning fluid rinse solution, also called
equipment blank. Rinsate blank examples include a final
rinse of the device used to collect soil or vacuumed dust or
the final rinse to clean a scoop used to collect soil or
vacuumed dust samples. The Rinsate blank is used in
rinsing collection media and equipment prior to use to
monitor possible cross contamination. The Rinsate blank
goes through all steps in the analysis including the
digestion. (EPA, 757-R-92-006, May 1993)
Risk assessment
(1) An on-site investigation to determine the existence,
nature, severity, and location of lead-based paint hazards,
(2) The provision of a report by the individual or the firm
conducting the risk assessment, explaining the results of the
investigation and options for reducing lead-based paint
hazards. (40 CFR 745.223)
Room equivalent
A room equivalent is an identifiable part of a residence,
such as a room, a house exterior, a foyer, staircase, hallway,
or an exterior area (exterior areas contain items such as play
areas, painted swing sets, painted sandboxes, etc.). Closets
or other similar areas adjoining rooms should not be
considered as separate room equivalents unless they are
obviously dissimilar from the adjoining room equivalent.
Most closets are not separate room equivalents. Exteriors
should be included in all inspections. An individual side of
an exterior is not considered to be a separate room
equivalent, unless there is visual or other evidence that its
paint history is different from that of the other sides. All
sides of a building (typically two for row houses or four for
freestanding houses) are generally treated as a single-room
equivalent if the paint history appears to be similar. For
multifamily developments or apartment buildings, common
areas and exterior sites are treated as separate types of units,
not as room equivalents (1995 HUD Guidelines, Chapter 7,
1997 Revision).
A-44
Previous Page
