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COLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client. EMCON Associates Semee Request: S950196 <br /> Project ARCO Facility No 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: 2127, 28/95 <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> TPH as Ethyl- Xylenes, <br /> Analyte Gasoline Benzene Toluene benzene Total <br /> Units ug/1-(ppb) ug/L(ppb) ug/L(ppb) ug/L(ppb) ug/L(ppb) <br /> Method Reporting Limit 50 05 05 05 05 <br /> Sample Name Lab Code <br /> MW-1(56') S950196-001 59 21 2 5 10 3 3 <br /> MW-2(6l') S950196-002 ND ND ND 05 ND <br /> MW-3(62) 5950196-003 84* ND ND ND ND <br /> MW-4(63') S950I96-004 ND ND ND ND ND <br /> MW-5(60') S950196-005 6,700 420 87 620 1,100 <br /> MW-6(58') 5950196-006 ND ND ND ND ND <br /> Method Blank S950227-WBI ND ND ND ND ND <br /> Method Blank 5950228-WB2 ND ND ND ND ND <br /> * This sample contains a single component eluting in the gasoline range,quantified as gasoline The chromatogram <br /> does not match the typical gasoline fingerprint <br /> Approved By Date _ l?2.1 1p <br /> 3AB'rXCJiAS106t694 <br /> Page 3 <br />