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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> ent EMCON Service Request: S950620 <br /> rolect ARCO Facilitv No 21681 EMCON Project No 0805-146 04 Date Collected: 5112195 <br /> ample Matnx• Soil Date Received: 5115195 <br /> Date Extracted- NA <br />' Date Analyzed: 5122-23195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LM Method <br /> Percent Recovery <br /> ample Name Lab Code a,a,a-Tnfluorotoluene <br />( 13 (185) S950620-001 80 <br /> -13 (21 5) S950620-002 100 <br /> -13 (25) S950620-003 98 <br /> VW-8(21 5) 5950620-004 108 <br /> W-9(215) S950620-006 95 <br /> 3 (15 5) 5950620-008 96 <br /> VW-8(11 5) 5950620-009 101 <br /> 8(16 5) 5950620-010 80 <br /> V-9(11 5) <br /> 5050623-011 68 <br /> VW-9 (16 5) 5950620-012 71 <br /> L13 (18 5) (MS) 5950620-00 IMS 86 <br /> -13 (18 5) (DMS) 5950620-OOIDMS 60 <br /> Method BIank S950522-SBI 109 <br /> ethod Blank S950523-SBI 111 <br /> CAS Acceptance Limits 51-137 <br /> 1 <br /> Approved By _ .J�r��� '«„r- - - ^Date ` <br /> SUR 11062994 <br /> 0620 XLS GB7X SrLS S/ZW9S Page No <br />