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COLUMBIA ANALYTICAL SERVICES. INC. s <br /> . Client: EMCON Associates Date Received. 08/26/92 <br /> Project EMCON Project No G71-38 01 Work Order #- SJ92-1071 <br /> Arco Facility No 2168 Sample Matrix Water <br /> QA/QC Report <br /> Matnx Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Method 5030/DHS LUST Method <br /> {1g/L (ppb) <br /> Date Analyzed 08/31/92 <br /> Percent Recovery <br /> Sample Spike Result Acceptance <br /> • Analytes Spike Level Result MS DMS MS DMS Criteria <br /> i <br /> TPH as Gasoline 250 ND 257 261 103 104 70-130 <br /> 1 TPH Total Petroleum Hydrocarbons <br /> ND None Detected at or above the method reporting limit <br /> 1 <br /> 1 <br /> • <br /> Approved by Date r <br /> 1 <br /> 10 <br />