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C1 <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> r� QA/QC Report <br /> Client EMCON Associates <br /> Service Request K9501041 <br /> Project ARCO/Stockton/#1775-234 01 Date Collected NA <br /> LCS Matnx Water Date Received- NA <br /> Date Extracted 2/28/95 <br /> Date Analyzed 3/2/95 <br /> Laboratory Control Sample Summary <br /> Oil& Grease Non-Polar <br /> SM 5520 C &F <br /> Units mg/L (ppm) <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Anahte Value Result Recovery Limits <br /> Oil 20 176 4 81-110 <br /> Appro�,,d 8N Date <br /> 4Sl10: - <br /> OIOIIP'-_SP1 glg,,LCS !4195 <br /> Page No <br />