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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> • Client: ARCO Products Company Service Request: S951020 <br /> Protect: 1775-234 001 /TO## 17075 00/2168 Stockton Date Collected. 8/15/95 <br /> Sample Matrix Water Date Received: 8116195 <br /> Date Extracted: NA <br /> Date Analyzed: 8/24/95 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/Califorma DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name MW-1 (54) <br /> Lab Code 5951020-001 <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 50,000 50,000 45,400 91,900 91,200 93 92 67-121 1 <br /> DMSISIMW[94 <br /> Page 12 <br />