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• COLUMBIA ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates Date Received: 09/09/92 <br /> Project: EMCON Project No. G71-33.01 Work Order fit: SJ92-1126 <br />• Arco Facility No. 548 Sample Matrix: Water <br />• QA/QC Deport <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Method 5030/DHS LUFT Method <br /> yS/L {ppb) <br />• <br /> Sample Name: MW-2 (60) <br /> Date Analyzed: 09/10/92 <br />• <br /> Percent Recovery <br /> Sample Spike Result Acceptance <br /> Analyles Spike Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 250. ND 261. 263. 104. 105. 70-130 <br />• TPH Total Petroleum Hydrocarbons <br /> ND None Detected at or above the method reporting limit <br />• <br /> Approved by i= k� Date -qa. <br /> 7 <br />