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4._4 Laboratory Analis <br /> Soil and groundwater samples were submitted to Zymax under standard ten-day turn-around time for <br />' the following analyses <br /> TPHg and TPHd by United States Environmental Protection Agency (EPA) Test Method 8260 <br />' and GC/MS Combination <br /> BTEX and FOCs by EPA Test Method 8260 and GC/MS Combination <br /> Quality Assurance �ualit Control Procedures <br /> — _surance anV <br />' QA/QC measures were performed for each method of analysts with specificity for each analyte listed <br /> to the test method's QA/QC QA/QC measures included the following <br /> ro One method blank for every ten samples, batch of samples or type of matrix, whichever was <br /> more frequent <br />' o One sample analyzed to duplicate for every ten samples, batch of samples or type of matrix, <br /> whichever was more frequent <br />' C One spiked sample for every ten samples, batch of samples or type of matrix, whichever was <br /> more frequent,with spike made at ten times the detection limit or at the analyte level <br /> o One travel blank submitted with each batch of groundwater samples <br /> The laboratory reports and chain of custody documentation are included to Appendix E <br /> Project No 58475-06-02 -9- December 26,2001 <br />