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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates Date Received: 12/08/92 <br /> Project: EMCON Project No. OG71-033.01 Service Request No.: SJ92-1544 <br /> ARCO Facility No. 548 Sample Matrix: Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> ,ug/L (ppb) <br /> f <br /> Date Analyzed: 12/09/92 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 250. 60.6 334. 329. 109. 107. 70-130 <br /> i <br /> TPH Total Petroleum Hydrocarbons <br /> r� <br /> Approved by: l Date: C��J� / 2 <br />