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`Pr r <br /> COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client EMCON Associates Date CollLctLd 5116194 <br /> Protect Federated-Franks Exxon/OZ287-00 Date Received 5/19/94 <br /> Sample Matrix. Water Date Extracted NA <br /> Date Analyzed 5/24/94 <br /> Service Request SJ940600 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units gg/L(ppb) <br /> Sample Name MW-1 <br /> Lab Code SJ940600-1 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Pct cent <br /> Analyte MS DMS Result MS DMS MS DMS Limits Diticrence <br /> Benzene 25 25 <7* 30 9 313 124 125 75-135 1 <br /> Toluene 25 25 ND 25 2 25 6 101 102 73-136 2 <br /> Ethylbenzene 25 25 ND 24 4 25 0 98 100 69442 2 <br /> * Raised MRL due to matrix interference <br /> r <br /> Approved By ` � � v Date -1101C <br /> DM 9 57041594 <br /> 1921 Ringwood Avenue + Son Jose Colifornio g3Jf AJ °f 1 e�ephone 4081437 2400 Fox 408/407 9356 <br />