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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Date Received 11/03/92 <br /> Project EMCON Project No OG71-01 9 01 Work Order No SJ92-1367 <br /> ARCO Facility No 2133 Sample Matrix Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DWS LUFT Method <br /> ,ug/L (ppb) <br /> Sample Name E-9 18 <br /> Date Analyzed 11/09/92 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 5,000 8,930 14,900 14,100 119 103 70-130 <br /> TPH Total Petroleum Hydrocarbons <br /> Approved by d to iq Date <br /> 1� <br />