EP 1110-1-31
31 Aug 01
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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 refe rence 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.
2.3.3.5
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.
2.3.3.6
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 submitted to the laboratory for analysis in accordance with ASTM's Standard Practice
for Sample Digestion of Soils for the Determination of Lead by Atomic Spectrometry (E 1726).)
2.3.4
Project Data Review and Assessment
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NOTE: The analytical data acceptance criteria for lead hazard identification and control
samples provided in Table B-3 (Appendix B) have been adapted from the Laboratory
Quality System Requirements (LQSR) Revision 2.0 (August 1996), Table 1, Section 10-
Quality Assurance and Quality Control. Table B-3 must be verified (and updated as
needed) as a part of the SOW editing process by contacting the EPA NLLAP Program
Manager (call the EPA Hot Line 1-800-424-LEAD). Any time laboratory data are
reviewed for acceptability; the current revision of the LQSR must be consulted to make
required changes to Table B-3.
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The Contractor shall review all project data collected as part of the current assessment and verify
that the data is acceptable to meet the DQOs. Data review includes (1) Field sample collection
and control review, and (2) analytical laboratory data revie w. Field sample collection and
control review includes evaluating the adequacy of the Lead Inspection Sampling Plan and Risk
Assessment Sampling Plan throughout the performance of the assessment.
A-27
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