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McCampbell Analytical, Inc. 1102ndSouth #16 Pacheco,CA 9H 1622SfiD <br /> 4 1 Telephone 925-798-1620 Fax 925-798 1622 <br /> Website www mccarripbell com E-mail numQmccampbell corn <br /> . Advanced GeoEnvlroumental,Inc Client Project ID Flag City Chevron Date Sampled 05/20/04 <br /> 837 Shaw Road Date Received 05/21/04 <br /> Client Contact Tim Cuellar Date Extracted 05124104-05/26104 <br /> Stockton,CA 95215 <br /> Client P O Date Analyzed 05124/04-05/26104 <br /> Gasoline Range(C6-C12) Volatile Hydi ocarbons as Gasoline with BTEX and MTBE* <br /> - Extractionmediod SW50308 Analytical methods SW80218/8015Cm - Work Order 0405340 - <br /> Lab ID Client ID Matrix TPH(g) MTBE Benzene Toluene Ethylbenzene Xylenes DF %SS <br /> 001A MW19A W ND<500,1,i --- ND<5 0 ND<5 0 ND<5 0 ND<5 0 10 104 <br /> 002A MW19B W ND,1 --- ND ND ND ND 1 95 5 <br /> I I <br /> Reporting Limit for DF=1, W 50 50 05 0 5 05 05 1 AgIL <br /> ND means not detected at or �— <br /> above the reporung luiut S NA NA NA NA NA NA 1 mg/Kg <br /> *water and vapor samples and all TCLP&c SPLP exti icts are reported in ug/L,soillsludge/solid samples in mg/kg, wipe samples in Ag/wipe, <br /> product/oil/non-aqueous liquid samples in mg/L <br /> #cluttered chromatogram sample peak coelutes with surrogate peak <br /> +The following descriptions of the TPH chromatogra n are cursory in nature and McCampbell Analytical is not responsible for their interpretation a) <br /> unmodified or weakly modified gasoline is significant,b)heavier gasoline range compounds are signiftcant(aged gasoline?),c)lighter gasoline range <br /> compounds(the most mobile fraction)are significant d)gasoline range compounds having broad chromatographic peaks are significant biologically <br /> altered gasolme2,e)TPH pattern that does not appeai to be derived from gasoline(stoddard solvent/mineral spirit9),f)one to a few isolated non-target <br /> peaks present g)strongly aged gasoline or diesel range compounds are significant,h)lighter than water immiscible sheen/product is present,i)liquid <br /> sample that contains greater than—1 vol %sediment,j)reporting limit raised due to high MTBE content,k)TPH pattern that does not appear to be <br /> derived from gasoline(aviation gas) m2 no recogniz ihle pattern <br /> • DHS Certification No 1644 ngela Rydelius, Lab Manager <br />