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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Service Request. 5950254 <br /> Project. ARCO Facile-, No 2093 /EMCON Project No 1775-706 01 Date Collected. 2/28/95 <br /> Sample Matrix Water Date Received: 3/3/95 <br /> Date Extracted: NA <br /> Date Analvzed 3/9 10/95 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Caltfornia DHS LL--1'Method <br /> Percent Recovcry <br /> Sample Name Lab Code cx,a,a-Trifluorotolucne <br /> ATR-1 (26') 5950254-001 104 <br /> ATR-2 (29') S950254-002 102 <br /> ATR-4(27) S950254-003 106 <br /> ATR-5 (27') S950254-004 105 <br /> ATR-6 (26') 5950254-005 99 <br /> ATR-7(27') S950254-006 100 <br /> ATR-`j (24') S950254-007 97 <br /> ATR-10(24') S950254-008 96 <br /> ATR-11 (23') S950254-009 102 <br /> SMW-1 (191) S950254-010 101 <br /> ATR-6 (26') MS S950254-005MS 97 <br /> ATR-6 (26') DMS 5950254-005DMS 97 <br /> Method Blank S950309-WB 99 <br /> Method BIank S950310-WB 94 <br /> Method Blanc S950313-WB 90 <br /> CAS Accemance Littuts 69-116 <br /> Approved By ` � Date j <br /> SUR1/062994 <br /> Page 5 <br /> 1014 Ronwood Avanu,. • Knn in,;,. rniifmrmim or,4i4 • T.1cnk .nc A11A 417 7,/nn . Cr . Af)FkIA't7 O'{SA <br />