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' • COLUMBIA ANALYTICAL SERVICE4PINC. <br /> ' QA/QC Report <br /> Client: EMCON Service Request: K9504079 <br /> Project: Tosco-Tracy/#2788-100.02 Date Collected: 6/29/95 <br /> Sample Matrix: Water Date Received: 7/1/95 <br /> Date Extracted: NA <br /> Date Analyzed: 7/3,4/95 <br /> Surrogate Recovery Summary <br /> ' BTEX and Total Petroleum Hydrocarbons as Gasoline <br /> EPA Methods 5030A/8020 and California DHS LUFI'Method <br /> ' Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-BFB (PH) -BTEX) 4-BFB(FID -GAS) <br /> ' HP-4 K9504079-007 96 96 <br /> Method Blank K950703-WB 97 97 <br /> 1 <br /> CAS Acceptance Limits: 69-114 65-117 <br /> Approved By: �,. Date: (o <br /> SU 111594 <br /> ' <br /> 040]9PHC.WG1-BTXwSU /595 'w"D <br /> 0 0 <br />