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� P7 <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Associates Service Request: S941424 <br /> Project: TOSCO #11192/0952-090.02 Date Collected: 11/9,10194 <br /> Sample Matrix: Soil Date Received: 11/11/94 <br /> Date Extracted: NA <br /> Date Analyzed: 11/15/94 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT"Method <br /> Percent Recovery <br /> Sample Name Lab Code a,a,a-TriIIuorotoluene <br /> 11192-THP4S-10 5941424-001 113 <br /> 11192-THP4S-25 5941424-002 107 <br /> 11192-THPIS-10 S941424-003 109 <br />. <br /> 11192-THP 1 S-25 5941424-004 109 <br /> .1192-THP2S-10 S941424-005 103 <br /> 11192-THP2S-25 5941424-006 107 <br /> 11192 THP3S-10 5941424-007 110 <br /> 11192-THP3 5-25 5941424-008 103 <br /> Method Blank S941115-SB 108 <br /> CAS Acceptance Limits: 51-137 <br /> Approved By: Date: Z 3 <br /> SUR1108299� <br /> Page 13 of 15 <br />