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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client ARCO Products Compan-, Service Request: 5951018 <br /> Project 1775-212 001 /TO# 1707-9 00 / 760 Lodi Date Collected: 8/11/95 <br /> Sample Matrix Nater Date Received: 8/16/95 <br /> Date Extracted: 8/25/95 <br /> Date Analyzed: 8/28/95 <br /> �fatn%. Spike/Duplicate Matrix Spike Summary <br /> TPH as Diesel <br /> EPA N7cthod 3510/California DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name Batch QC <br /> Lab Code 89-3 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Leel Sample Spike Result Acceptance Percent <br /> Analyte MS D%1S Result MS DMS MS DMS Limits Difference <br /> TPH as Diesel 4 000 4 000 ND 3,491 3,477 87 87 61-141 <1 <br /> DMS 1 S/0G0194 <br /> Page 13 <br />