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r <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Companv Service Request: 5951093 <br /> Project: 1775-206 001/TO# 17075 00/ 548 Stockton Date Collected: 8/29/95 <br /> Sample Matrix Water Date Received: 8/31/95 <br /> Date Extracted: NA <br /> Date Analyzed: 917,8195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code cx,a,a-Tnfluorotoluene <br /> MW-1 (56) 5951093-001 95 <br /> MW-2 (6l) 5951093-002 90 <br /> MW-3 (62) 5951093-003 92 <br /> MW-4(63) 5951093-004 90 <br /> MW-5 (60) 5951093-005 95 <br /> MW-6(59) 5951093-006 95 <br /> MW-5 (60)MS 5951093-005MS 98 <br /> MW-5 (60) DMS S951093-005DMS 97 <br /> Method Blank 5950907-WB 100 <br /> Method Blank 5950908-WB 94 <br /> CAS Acceptance Limits 69-116 <br /> 0 <br /> SGRIl052994 <br /> Page 5 <br />