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I <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates Date Received 01/29/93 <br /> I Project: EMCON Project No OG71-029 01 Service Request No SJ93-0125 <br /> ARCO Facility No 2130 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 /> I Ng/L (ppb) <br /> I Date Analyzed 02/08/93 <br /> Percent Recovery <br /> i Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 2,500 1,920 4,550 4,760 105 114 70-130 <br /> TPH Total Petroleum Hydrocarbons <br /> Approved by u LLti Date 1 3 <br /> 6 <br />