EP 1110-1-28
31 Aug 01
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 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.
2.3.2.3
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.
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The Contractor shall submit double-blind QA paint chip samples to the laboratory for analysis. At a
minimum, these shall include field duplicate samples, prepared by using standard mortar and pestle
homogenizing techniques, collected at a rate of 2-5% of total samples collected. [The Contractor shall
submit standard reference samples (commercially-prepared paint chip samples with a known
concentration of lead) at a rate of 2-5% of the total samples collected, to the laboratory for analysis.
The lead concentration in the samples used shall be within 75% to 125% of the lead hazard action levels
in Table A-1 if available.] There shall be no indication to the laboratory, by sample identification
numbers or other means, that the samples are QA samples. The Contractor shall evaluate the results of
the analyses of QA samples as outlined in the DQOs developed under this SOW.
2.3.2.4
Field Rinsate Blank QA Samples (Soil)
One rinsate blank (see Glossary) for coring or spoon sampling techniques (refer to ASTM Method
E1727) shall be included with each batch of soil samples sent to the laboratory.
2.3.2.5
Matrix Spike/Matrix Spike Duplicate (MS/MSD) Soil QC Samples
The Contractor shall collect a sufficient quantity of soil to ensure that the laboratory can prepare the
MS/MSD samples. (One set of MS/MSD samples shall be prepared for each batch of soil samples
A-25
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