EP 1110-1-31
31 Aug 01
The text below gives the Contractor two options to generate spiked wipe samples:
In Option a, the Contractor must obtain the same wipe material used by the commercial source in
preparing the spikes, to collect field samples.
Option b allows the Contractor to use a second independent laboratory to prepare spikes sent to
the laboratory doing the analysis of the field data. NIST traceable materials must be used
by the laboratory in preparing the spike samples.
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The Contractor shall submit double-blind (spiked) QA dust wipe samples to the laboratory at a
frequency of one double-blind sample per 50 field samples collected (with a minimum of at least
one) using one of the two following options :
a. The Contractor shall obtain commercially prepared spiked wipe samples that are
prepared by meeting the same QA/QC requirements required in preparing spiked wipe samples
used by the AIHA in its management of the Environmental Lead Proficiency Analytical Testing
(ELPAT) laboratory certification program, for submittal to the laboratory. [One source of spike
samples meeting the QA/QC requirements is listed on the AIHA web site: http:\www.aiha.org].
The Contractor shall obtain from the commercial source, wipes of the same brand and type as
those used to prepare the spiked samples. The Contractor shall use these wipes to collect field
samples and to prepare field blank samples.
b. The Contractor shall hire a laboratory to prepare spiked wipe samples using
National Institute of Standards and Testing (NIST) traceable materials. Spiked samples shall be
prepared using leaded dust, not lead in solution. The lead concentration in the spiked wipe
samples shall approximate the amount of lead in the lead action level criteria for hard floors in
Table A-1 of this SOW. The Contractor shall provide uncontaminated wipes of the same brand
and lot as the wipes that will be used to collect field samples, to the laboratory preparing the
spiked samples. The laboratory shall use these wipes to prepare the spiked wipe samples. The
laboratory preparing the spiked samples shall be independent of the laboratory that will be used
to analyze the field samples and field QA samples.
There shall be no indication to the laboratory analyzing the field samples, by sample
identification numbers or other means, that the spiked samples are QA samples.
2.3.3.4
Field Duplicate/Spike Paint Chip QA Samples
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NOTE: The use of commercially prepared paint chip samples as spike samples allows
the contractor to submit spiked paint chip samples of predetermined, known lead
concentrations to the laboratory for QA purposes. This option can be used in conjunction
with the requirement to prepare field duplicate spike samples.
A-26
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