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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br />• Client EMCON Associates Service Request: 5950196 <br /> Protect ARCO Facility No 548/EMCON Project No 1775-206 01 Date Collected: 2/15/95 <br /> Sample Matrix Water Date Received 2/16195 <br /> Date Extracted* NA <br /> Date Analyzed: 2/27/95 <br /> Matra Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/Califorrua DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name MW-2(61') <br /> Lab Code 5950196-002 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analyte MS DMS Result MS DMS MS DMS Limits Difference <br /> Gasoline 250 250 ND 260 253 104 101 67-121 3 <br /> Approved By - __.., Date '�4.2-?V <br /> DMSl S/W194 <br /> Page 7 <br />