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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Arco Product Services Service Request: S9501451 <br /> Project: 1775-212 001frO417075 00/760 Lodi Date Collected: 11/15/95 <br /> Sample Matnx: Water Date Received: 11/16/95 <br /> Date Extracted: 11/22,30/95 <br /> Date Analyzed: 11/30/95 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Diesel <br /> EPA Method 3510/California DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name <br /> Lab Code <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Simple Spike Result Acceptance Percent <br /> Analyte MS DMS Result MS DMS MS DMS Limits Difference <br /> TPH as Diesel 5 240 5,240 ND 6480 6500 124 124 61-141 0 <br /> OMSISM60194 <br /> Page 12 <br />