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w <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Oiient ARCO Products Compan-, Service Request: L960252I <br /> ProleLt 2168 Stockton/#21775-23.1 002/TO#19350 00 Date Collected NA <br /> LCS Matrix Water Date Received NA <br /> Date Extracted 5/23/96 <br /> Date Analyzed 5/23/96 <br /> Laboratory Control Sample/Duplicate Laboratory Control Sample Summarv* <br /> Hydrocarbons <br /> SM5520 CIF <br /> Units mg/L (ppm) <br /> Percent Recovery <br /> CAS Relative <br /> True Value Regult Acceptance Percent <br /> Analyte LCS DLCS LCS DLCS LCS DLCS Limits DifferenLe <br /> Hydrocarbons 2 11 2 11 2 10 203 100 96 75-125 3 <br /> * Sample quantity was insufficient to perform matrix spike and matrix spike duplicate Three <br /> separate replicate one liter samples are required to analyze sample and spikes <br /> ULCS/O'%2195 <br /> Page 8 <br />