EP 1110-1-29
31 Aug 01
2.3.2.4
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
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).)
2.3.3
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-1 (Appendix B) have been adapted from the LQSR,
Revision 2.0 (August 1996), Table A-1, Section 10-Quality Assurance and Quality
Control. Table B-1 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 at 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-1.
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The Contractor shall review all project data collected during the clearance assessment and verify that
the data was collected in accordance with the DQOs. Data review includes (1) field sample collection
and control review; and, (2) analytical laboratory data review. Field sample collection and control
review includes evaluating the adequacy of the Clearance Sampling Plan throughout the performance of
the assessment.
2.3.3.1
Field Wipe Quality Assurance Verification
Prior to beginning field dust sampling, the Contractor shall provide the laboratory with at least one
uncontaminated wipe per each container of bulk packed wipes that will be used for collecting field dust
wipes, to verify that the wipe material meets the requirements of Standard Specification for Wipe
Sampling Materials for Lead in Surface Dust (E 1792). Wipes containing more than 5.0 g/wipe of
background lead shall render the entire container of bulk packed wipes contaminated and disqualify the
represented wipes for field use. (See AIHA web site for a list of wipe venders meeting ASTM Method
E 1792 criteria).
2.3.3.2
Laboratory QA and QC (QA/QC) Verification.
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NOTE: The Contractor must choose the most advantageous technique to provide extra
samples to the laboratory should additional samples be required by the laboratory to
replace sampling or QA/QC data lost due to laboratory mistakes. The Government is
not liable for cost of additional sample collection due to laboratory mistakes, Contractor
collection problems, or chain-of-custody errors.
A-22
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