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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client- ARCO Products Companv Service Request. S9501565 <br /> Project• 1775-709 001 /TO,# 17075 00 /2133 Stockton Date Collected: I2/5/95 <br /> Sample Matnc Water Date Received- 12/7/95 <br /> Date Extracted: NA <br /> Date Analyzed: 12/I4-16/95 <br /> Surrogate Recovery Summan <br /> STEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Califotzua DHS LLTFr Method <br /> PID Detector FID Detector <br /> Percent Recover} Percent Recovery <br /> Sample Name Lab Code 4-Bromofluorobenzene oc,rx,ac—Tnfluorotoluene <br /> BHD-1 (27) 59501565-001 96 105 <br /> E•2 (21) 59501565-002 90 112 <br /> E-8 (23) 59501565-003 86 96 <br /> E-9 (18) 59501565-004 90 <br /> 108 <br /> E-11 (21) 59501565-005 81 I13* <br /> E-12 (18) S9501565-006 94 100 <br /> MW-4 (26) 59501565-007 94 98 <br /> MW-5 (28) S9501565-008 87 95* <br /> MS S9501551-002MS 92 106 <br /> DMS 59501551-002DMS 92 107 <br /> Method Blank S951214-WB 93 96 <br /> Method Blank 5951215-WB 96 103 <br /> Method Blank 5951216-WB 90 93 <br /> CAS Acceptance Ltttuts 69-116 69-116 <br /> * The surrogate used for this sample was 4-bromoflurobenzene <br /> • <br /> SUR7/M I94 <br /> Page 5 <br />