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COLUMBIA ANALYTICAL SERVICES.INC <br /> QA/QC Report <br /> Client EMCON Senzce Request- 5950639 <br /> Project ARCO Facility No 2168/EMCON Project No 1775-231 00t Date Collected 5/17/95 <br /> Sample Matrix Water Date Received. 5/18/95 <br /> Date Extracted: NA <br /> Date Analyzed: 5125/95 <br /> Matrix Spike/Duplicate Matrtx Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name MW-1 (53) <br />' Lab Code S950639-OO1 I <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result -acceptance Percent <br /> knahte MS DMS Result MS DMS MS DMS Lirruts Difference <br /> GaSol[nc iO OOO 50 000 38 300 86 300 96 300 96 96 67-121 <1 <br /> M <br /> 4porm cd By Date - �r <br /> X00194 <br /> SLS wR�ms a1,15 <br /> page No 4. <br />