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r <br /> COLUMBIA ANALYTICAL SERVICES,INC. f y � <br /> QA/QC Report <br /> Client EMCON Associates Service Request- 5950196 <br /> Protect ARCO FacilityNo 548/EMCON Project No 1775-20601 Date Collected 2/15/95 <br /> Sample Matrix Water Date Received. 2/16/95 <br /> Date Extracted NA <br /> Date Analyzed 2/27, 28/95 <br /> Surrogate Recovery Surnmary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Calrforma DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code a,a,a-Trifluorotoluene <br /> MW-1(56') 5950196-001 101 <br /> MW-2(61') 5950196-002 99 <br /> MW-3(62') 5950196-003 100 <br /> MW-4(63') S950196-004 96 <br /> MW-5(60') 5950196-005 104 <br /> MW-6(58') 5950196-006 97 <br /> MW-2(6 F)MS 5950196-002MS 105 <br /> MW-2(6P)DMS 5950196-002DMS 106 <br /> Method Blank 5950227-WB 1 105 <br /> Method Blank 5950228-WB2 90 <br /> CAS Acceptance Limits 69-116 <br /> Approved By Date 3 -!� <br /> SURIUM4 <br /> Page 5 <br />