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4.5 Quality Assurance and Quality Control Procedures <br /> QA/QC procedures were performed for each method of analysis with specificity for each analyte listed <br /> in the test method's QA/QC. The laboratory QA/QC procedures included the following: <br /> • One method blank for every ten samples, batch of samples or type of matrix, whichever is more <br /> frequent. <br /> • One sample analyzed in duplicate for every ten samples, batch of samples or type of matrix, <br /> whichever is more frequent. <br /> • One spiked sample for every ten samples, batch of samples or type of matrix, whichever is more <br /> frequent, with the spike made at ten times the detection limit or at the analyte level. <br /> Prior to submitting the soil samples to the laboratory, the chain-of-custody documentation was <br /> reviewed for accuracy and completeness. Reproductions of the laboratory reports and chain-of- <br /> custody documentation are presented in Appendix C. <br /> Project No S8475-06-70 -7- July 9,2003 <br />