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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> iClient: EMCON Associates Date Collected. 3/4/94 <br /> Project 2481-100 OL/DSS Construction Date Received. 3/I6/94 <br /> Sample Matnx: Soil Ddte Extracted: ND <br /> Date Analyzed: 3/17194 <br /> Service Request- SJ94-0314 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> Units mg/Kg(ppm) <br /> As Received Basis <br /> Sample Name T-8 <br /> Lab Code 9440314-5 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analyte Result MS DMS MS DMS Limits Difference <br /> Benzene 005 ND 0 047 0 056 94 112 57-154 17 <br /> Toluene 005 ND 0 043 0 050 96 100 60-142 15 <br /> Ethylbenzene 005 ND 0 045 0 051 90 102 46-150 13 <br /> Approved Bv Date Am�� <br /> 946314 XLS/3/29194 page No <br /> 4 Q')4 0inn �,..� C ono a 4` 4 • Tnla 0An-Y n4nf'l =r- AnnfAn7 01'SKA <br />