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•i 1 <br /> COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client: ARCO Products Companv Service Request 5951075 <br /> Prosect 1775-229 001 /TO# 17075 00/2130 Stockton Date Collected: 8/25/95 <br /> Sample Matrix Water Date Received- 8/29/95 <br /> Date Extracted NA <br /> Date Analyzed 9/7/95 <br /> Matnx Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Units ug/L (ppb) <br /> Sample Name MW-4 (74) <br /> Lab Code 5951074-004 <br /> Percent ReLovery <br /> CAS Relative <br /> Spike Level Srmple Spike Result Acceptance Percent <br /> Anal%te MS DMS Result MS DMS MS DMS Limits Difference <br /> Gasoline 250 250 ND 244 246 98 98 67-121 l <br /> DMS LS1050194 <br /> Page 7 <br />