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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br />,*Client ARCO Products Company Service Request L9602626 <br /> Project 760 LOD1/#21775-212 002/TO#19350 00 Date Collected: NA <br /> LCS Matrix Water Date Received NA <br /> Date Extracted: 5129196 <br /> Date Analyzed- 5129/96 <br /> Laboratory Control Sample/Duplicate Laboratory Control Sample Summary* <br /> Hydrocarbons <br /> SM5520 B/F <br /> Units mg/L (ppm) <br /> Percent Recovery <br /> CAS Relative <br /> True Value Result Acceptance Percent <br /> Analyte LCS DLCS LCS DLCS LCS DLCS Lututs Difference <br /> Hydrocarbons 793 793 745 695 94 88 75-125 7 <br /> * Sample quantity was tnsuffictent to perform matrix sp:be and matnx spike duplicate Three <br /> separate replicate one liter samples are required to ananne sample and spikes <br /> aLCS/032395 <br /> Page 13 <br />