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COLUMBIA ANALYTICAL SERVICES,L`C. <br /> QA/QC Report <br /> *Client. ARCO Products Companv Service Request S9601431 <br /> Protect 548 Stockton/#21775-206 002/TO#19350 00 Date Collected 8/29/96 <br /> Sample Matrix- Water Date Recexi ed: 8/30/96 <br /> Date Extracted: NA <br /> Date Analyzed. 9/9196 <br /> Matrix Spike/Duplicate Matrix Spike Summar-- <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Units ug/L (ppb) <br /> Sample Name Batch QC <br /> Lab Code S9601425-001 <br /> Percent Recover-s <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analvtc MS DMS Result MS DMS MS D%1S limits difference <br /> Gasoline 250 250 ND 230 230 92 -J2 67-121 <1 <br /> 0 <br /> J 1[515!060194 <br /> Page 10 <br />