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COLUMBIA ANALYTICAL SERVICES. INC. <br /> QA/QC Report <br /> Client EMCON Associates Date Received 04/30/93 <br /> Project EMCON Project No OG71-019 01 Service Request No : SJ93-0591 <br /> ARCO Facility No 2133 Sample Matrix Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Ng/L Ippb) <br /> Sample Name PR-1 127 <br /> Date Analyzed 05/12/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> An I e Lave <br /> l Result MS DMS MS DM:J kriteria <br /> TPH as Gasoline 250 ND 251 242 100 97 76-130 <br /> TPH Total Petroleum Hydrocarbons <br /> NO None Detected at or above the method reporting limit <br /> Approved by Date•-4 <br /> a <br /> 11 <br /> 1921 Rrn9wood Avenue • Son Jose Cohfornio 95131 • Telephone 4081437 2400 Fox 4081437 9356 <br />