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A <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client ARCO ProduLtti Company Service Request: 59700986 <br /> Projet.t 21775-206 0()3/T0#21333 00/548 STOCKTON Date Collected: NA <br /> Sample Matt n Water Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed; NA <br /> Surrogate Recovery Summary <br /> BTEX, MTBE and TPH as Gasoline <br /> Prep Method FPA 5030 Units PERCENT <br /> Analysts Method 8020 C.AILUFT Bans NA <br /> Test Percent Recovery <br /> Sample Name Lab Code Notes 4-Bromofluorobenzene a,a,a-Tnfluorotoluene <br /> MW-1 (56) S9700986-001 98 104 <br /> MW-2(61) 59700986-002 102 104 <br /> MW-3 (62) S9700986-003 101 99 <br /> MW4(63) 59700986-004 101 99 <br /> MW-5(60) 59700986-005 98 99 <br /> MW-6(57) 59700986-006 101 100 <br /> MW-4(63) 59700986-004MS 103 100 <br /> MW-4(63) S9700986-004DMS 102 98 <br /> Method Blank S970605-WBI 100 97 <br /> • <br /> CAS Acceptance Limits 69-116 69-116 <br /> SURV02097p <br /> I <br /> Page I1 <br />