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l i <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> . Client ARCO Products Companv Service Request 59602027 <br /> Project 2168 STOCKTON / _'1775-234-002/TO##19350 00 Date Collected 11/25/96 <br /> Simple Mati 1% 1Vaicr Date Received 11/27196 <br /> Date Extracted NA <br /> Date Analyzed 1214/96 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EP k Methods 5030/California DHS LOFT Method <br /> Units ug/l,(ppb) <br /> Sample Nainc Batch QC <br /> Lab Code ti9601985AWIMS DMS <br /> Pcicent Recovery <br /> CAS Relative <br /> SPll.c Level Simple Spike Result Acceptance Percent <br /> AnaI,%te Ms DMS Rewit MS DMS MS DMS Limits Diffetence <br /> Gasoline 250 250 ND 230 240 92 96 67-121 4 <br /> DMSI 51060194 <br /> Page 9 <br />