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March 7, 2019 | Page B-4 File No. 0504-119-01 <br />OVERALL ASSESSMENT <br />As was determined by this data validation, the laboratory followed the specified analytical methods. <br />Accuracy was acceptable, as demonstrated by the surrogate and LCS/LCSD percent recovery values. <br />Precision was acceptable, as demonstrated by the LCS/LCSD and field duplicate RPD values. <br />No analytical results were qualified. The data are acceptable for the intended use. <br />REFERENCES <br />U.S. Environmental Protection Agency (EPA). “Guidance for Labeling Externally Validated Laboratory <br />Analytical Data for Superfund Use,” EPA-540-R-08-005. January 2009. <br />U.S. Environmental Protection Agency (EPA). “Contract Laboratory Program National Functional Guidelines <br />for Organic Superfund Methods Data Review,” EPA-540-R-2017-002. January 2017.