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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client ARCO Products Conipanv Service Request S951140 <br /> Prole;-t 1775-709 001 /TO# 17075 00 / 2133 Stockton Date Collected 9/11 12/95 <br /> Sample Matrix 1kater Date Received. 9/13/95 <br /> Date Extracted. NA <br /> Date Analyzed: 9/20-21/95 <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 a!x ix-Trifluorotoluene <br /> PR-1 (27) S951140-001 93 <br /> PR-2 (27) S951140-002 91 <br /> BHD-I (27) S951140-003 114 <br /> BHD-2 (28) S951140-004 91 <br /> E-2 (2 1) S951140-005 104 <br /> E-3 (18) 5951140-006 94 <br /> E-4 (20) 5951140-007 110 <br /> E-5 (18) S951140-008 97 <br /> E-6 (16) S951140-009 1 I 1 <br /> E-7(18) S951140-010 94 <br /> E-8 (23) 5951140-011 102 <br /> E-9 (18) S9511404012 102 <br /> E-11 (2 1) S951140-013 105 <br /> E-12 (17) 5951140-014 91 <br /> MW-1 (29) S951I40-015 91 <br /> MW-2 (27) 5951140-016 1.07 <br /> MW-3 (29) S951140-0I7 92 <br /> MW-4 (26) S951140-018 91 <br /> MW-5 (28) 5951140-019 107 <br /> E-2 (2 1)MS S951140-005MS 116 <br /> E-2 (2 I) DMS 5951140-0OSDMS 112 <br /> Method Blank S950920-WB 95 <br /> Method Blank S950921-WB 95 <br /> CAS Acceptance Limits 69-116 <br /> * The surrogate used for this sample was 4-bromofluorobenzene <br /> SURIM2"4 <br /> Page 5 <br />