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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client EMCON Associates Service Request 5941493 <br /> Project TOSCO #11194/0952-092 02 Date Collected 11/17/94 <br /> Sample Matrix Soil Date Received 11/21194 <br /> Date Extracted NA <br /> Date Analyzed 11/22/94 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Califorma DHS L=Method <br /> i <br /> Percent Recovery <br /> i <br /> Sample Name Lab Code a,cc,a-Trdluorotoluene <br /> 11194-TD 2-S S941493-001, 101 <br /> Method BIank 5941122-SB 102 <br /> • <br /> CAS Acceptance Limits 59-115 <br /> Approved By Date <br /> SURIM6z"4 <br /> Page 6 of 6 <br />