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COLUMBIA ANALYTICAL SERVICES,INC. <br /> • QA/QC Report <br /> Client: ARCO Products Companv Service Request: 5951357 <br /> Project 1775-706 001 /TO## 17075 00/ 2093 Tracv Date Collected: 10/27/95 <br /> Sample Matrix Water Date Received: 10/31/95 <br /> Date Extracted NA <br /> Date Analyzed: 11/6,7195 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/Califorma DHS LUFT Method <br /> Uruts ug/L(ppb) <br /> Sample Name Batch QC <br /> 1,ab Code 5951362-001 <br /> Percent Recovery <br /> CAS Relative <br /> Spike LLrel Simple Spike Result Acceptance Percent <br /> \nalvte %IS DMS Result MS DMS %IS DMS Limits Difference <br /> Gasoline 250 250 ND 230 260 92 104 o7-121 12 <br /> DMS l 51060194 <br /> Page 7 <br />