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COLUMBIA ANALYTICAL SERVICES 1':C <br /> C-A OC �-enort <br /> Client EMCON Associates Date Received 11,30193 <br /> Project. EMCON Project No OG71-029 01 Service Request No SJ93-1453 <br /> ARCO Facility No 2130 Sample Matrix 'water <br /> Matrix SpikerDuplicate Matrix Spike Summar <br /> TPH as Gasoline <br /> EPA Metnods 5030/California DHS LOFT letnco <br /> pg/L (ppb) <br /> Date Analyzed 12/06193 <br /> P e r c e n t Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 250 ND 241 251 96 90 76-130 <br /> Approved by Date <br />