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r <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: ARCO Products C:uinpanv <br /> Project: 21775-2-37.002/1-0#21333.00/2186 STOCKTON Service Request: S4700954 <br /> Sample Matrix Water Date Collected: NA <br /> Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: 6/2/97 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> Sample Name: M W-2(74) <br /> Lab Code: 59700950-002MS, 59700959-002DMS Units' ug/L(ppb) <br /> Test Notes; Basis: NA <br /> Percent Recovery <br /> Prep Analysis Spike Level Sample Spike ResultCAS Native <br /> Analyte Method Method MRL M5 DMS Result MS DMS MS DMS Acceptance Percent Resp <br /> Limits Difference Nate <br /> Gasoline EPA 5030 CA/LUFT 50 250 250 ND 240 270 96 108 75-135 <br /> 12 <br /> i <br />�1 <br /> IDMS/020597p <br /> Page IO of 11 <br />