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COLUMBL-'k ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Service Request K950968S <br /> Project Arco 760/Lodi/#1775-212 01 Date Collected NA <br /> LCS Matrix Water Date Received NA <br /> Date Extracted 2/28/95 <br /> Date Analyzed 2/283/l/95 <br /> Laboratory Control Sample Summary <br /> Oil and Grease Non-Polar <br /> SM 5520B & F <br /> Units nig/L (ppm) <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> AnalNte Value Result Recovery Limits <br /> 0i1 50 52 104 85-115 <br /> SM Standard Methods for the Examtnauon of Water and Wastewater 17th Ed, 1989 <br /> i A <br /> Approved By Date <br /> I(,5!]02194 <br /> 0968SPHC P%fl 5520b&f Ics 3,195 Page No <br />