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COLUMBIA ANALY'T'ICAL SERVICES, INC. <br /> QA/QC Report <br /> Client ARCO Products Company <br /> Service Request. S9501565 <br /> Project 1775-709 001 /TO# 17075 00/2 133 Stockton Date Collected 12/5/95 <br /> Sample Matrix Nater Date Received: l2/7/95 <br /> Date Extracted NA <br /> Date Analyzed: 12/14-16/95 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/Califorrua DHS LUFT Method <br /> Units ug/L (ppb) <br /> Sample Name Batch QC <br /> Lab Code S9501551-002 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Leel Sample Spike Result Acceptance Percent <br /> Analvte NIS DMS Result MS DMS MS DMS Limits Difference <br /> Gasoline 250 250 ND 230 230 92 92 67-I2I <I <br /> • <br /> oMs�sro6ais4 <br /> Page 7 <br />