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I <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Date Received 03/03/93 <br /> I Project: EMCON Project No OG71-051 01 Service Request No SJ93-0304 <br /> ARCO Facility No 6020 Sample Matrix Water <br /> I <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Total Petroleum Hydrocarbons as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> ug/L (ppb) <br /> Date Analyzed 03/09/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 25,000 4,970 30,300 30,900 101 104 70-130 <br /> TPH Total Petroleum Hydrocarbons <br /> J <br /> Approved by Date _�/ C _ �5 <br />