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COLUMBIA ANALYTICAL SERVICES. INC <br /> " QA/QC Report <br /> . Client EMCON Associates Date Received 02/24/93 <br /> Project EMCON Project No OG71-017 01 Service Request No : SJ93-0261 <br /> ARCO Facility No 434 Sample Matrix Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Total Petroleum Hydrocarbons as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Ng/L (ppb) <br /> Sample Name W-1A 77 <br /> Date Analyzed 03/05/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> TPH as Gasoline 250 ND 325 326 130 130 70-130 <br /> TPH Total Petroleum Hydrocarbons <br /> ND None Detected at or above the method reporting limit <br /> Approved by ► Date: _ `�'rC'' �0//�-3 <br /> 9 <br /> 1921 Ringwood Avenue • Son Jose California 95131 • Telephone 4081437 2400 • Fox 408/437 9356 <br />