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b COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client EMCON Service Request K9501041 <br /> Protect: ARCO/Stockton/#1775-234 01 Date Collected- 2/16/95 <br /> Sample Matrix: Water Date Received: 2/22/95 <br /> Date Extracted: NA <br /> Date Analyzed 3/1/95 <br /> Surrogate Recovery Summary <br /> Halogenated Volatile Organic Compounds <br /> EPA Methods 5030A/601 <br /> Percent Recovery <br /> Sample Name Lab Code Bromochloromethane <br /> MW-1(54') K9501041-001 110 <br /> MW-2(53') K9501041-002 108 <br /> MW-3(53') K9501041-003 101 <br /> MW-4(58') K9501041-004 101 <br /> MW-5(59') K9501041-005 107 <br /> MW-6(47') K9501041-006 101 <br /> MW-1(54') K9501041-001MS 107 <br /> MW-1(54') K9501041-OOlDMS 106 <br /> Method Blank K9501041-MB 93 <br /> CAS Acceptance Linuts 70-130 <br /> Approved By r Date /4 <br /> SURI7102194 <br /> 01041 VOA 1G1 SUR1 318!95 U O G 1 14 5ap No <br />