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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br />. Client EMCON Associates Service Request- S950192 <br /> Project ARCO Facility No 760/EMCON Project No 1775-212 01 Date Collected: 2/13/95 <br /> Sample ,NIatrn Water Date Recened: 2/16/95 <br /> Date Extracted. NA <br /> Date Anal zed: 2/22, 23/95 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Percent Recovery <br /> S.imhlc Name Lab Code {x,cx,a-Tr>fluorotoluenc <br /> MW-1(74 5950192-001 105 <br /> MW-2(773 1 5950192-002 106 <br /> MW-3(7, ; S950192-003 113 <br /> MS S95021 1-001MS 101 <br /> DMS 595021 i-001DMS 102 <br /> Method Blank 5950222-WB1 92 <br /> CAS Acceptance Limits 69-116 <br /> 1b <br /> Appro%ea EN Date -I//X95' <br /> ,,URI0CW 1 ..---� <br /> Page 5 <br /> 07� Qinn—'+.-.i A,,enr. <br />