EP 1110-1-28
31 Aug 01
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a.
Evaluation of Laboratory Data
The Contractor shall obtain and review NLLAP-required QC data generated for each sample run
completed under this SOW. The QC data shall include batch QC validation data and the 95%
confidence interval data (determined by the laboratory from QC charts or a QC database for each
matrix, i.e., single surface dust wipe samples, deteriorated paint chip samples, soil samples) determined
at concentrations equivalent to 40 g/ft2 for dust wipe samples, 0.5% by weight (5000 g/g (ppm)) for
paint chip samples, and [insert applicable criteria from Table A-1] g/g (ppm)) for bulk soil samples.
The Contractor shall evaluate the data package to determine that the QA/QC data generated for each
sample run falls within current NLLAP Laboratory Quality System Requirements (LQSR) parameters
listed in Table B 3 (Appendix B). Spiked samples submitted to the laboratory shall fall within 75% -
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125% of the true value.
b.
Rejection of Laboratory Data
The Contractor shall not accept or use data from the laboratory that does not fall within current NLLAP
LQSR parameters specified in Table B-3, (Appendix B). If the laboratory fails to obtain spiked sample
results within the specified error limits:
Two more spikes of the same matrix shall be sent immediately to the laboratory for analysis.
If the two additional spike samples fail, the sample batch shall be considered invalid for the
matrix represented.
If laboratory data are rejected and insufficient quantities of the samples remain to allow re-analysis of
the samples while adhering to QA/QC requirements, the Contractor shall collect and submit additional
samples, at no cost to the Government, for laboratory analysis using NLLAP QA/QC protocols. The
Contractor shall also be responsible for any re-sampling required due to laboratory errors that result in
the destruction or loss of data, or a failure to report results on any samples submitted.
2.3.4
Contractor Certification of Project Data Validity
The Contractor shall certify that all field data collected to determine the presence of a lead hazard were
valid and meet the DQOs.
2.3.5
Comparison with Lead Hazard Criteria
The Contractor shall compare the collected data with the lead hazard criteria listed in Table A 1 to
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determine whether lead hazards are present. This comparison shall be documented in the Risk
Assessment Report, as outlined below.
For all hazard evaluations, the data shall be examined to determine if consistent patterns emerge (e.g.,
the window troughs contain high levels, while floors and interior sills are low); such patterns will be used
in the development of recommendations for focused, cost-effective control measures.
A-27
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