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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates Data Received 01/29/93 <br /> Project EMCON Project No OG71-029 01 Service Request No . SJ93-0125 <br /> ARCO Facility No 2130 Sample Matrix: Water <br /> Matrix SpikeiDuplicate Matrix Spike Summary <br /> Total Petroleum Hydrocarbons as Gasoline <br /> EPA Methods 50301California DHS LUFT Method <br /> Pg1L (ppb) <br /> Date Analyzed 02/08/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS OMS Criteria <br /> TPH as Gasoline 2,500 1,920 4,550 4,760 105 114 70-130 <br /> TPN Total Petroleum Hydrocarbons <br /> Approved by Date. 1 <br /> 6 <br />