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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> iClient: EMCON Service Request: 59602044 <br /> Protect 2130 Stockton/#21775-229 002/I'O#19350 00 Date Collected 11/26/96 <br /> Sample Matrix- Water Date Received: 1213196 <br /> Date Extracted NA <br /> Date Analyzed 12/6196 <br /> Matn\ Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/CalLforma DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name MW-7 (72) <br /> Lab Code S9602044-007MS DMS <br /> Percent Recovery <br /> CAS Relative <br /> Spike Lew[ Sample Spike Result Acceptance Percent <br /> Anahte MS DMS Result MS DMS MS DMS Limits Difference <br /> Gasoline 250 250 ND 240 230 96 92 67-121 4 <br /> DMSJS+060k94 <br /> Page 9 <br />