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110 2nd Avenue South #D7 Pacheco CA 94553 5560 <br /> McCarrlpbell Analytical Inc Telephone 925 798 1620 Fax 925-798-1622 <br /> h //www niccampbell corn 8 mail ma ca bell corn <br /> . Advanced GeoEnvlronmental, Inc Client Project ID Flag City Chevron Date Sampled 10/30/02 <br /> 837 Shaw Road Date Received 10/31/02 <br /> Stockton, CA 95215 Client Contact Tim Cuellar Date Extracted 11/01/02-11/02/02 <br /> Client P O Date Analyzed 11101/02-11/02/02 <br /> Gasoline Range(Cb-C12) Volatile Hydrocarbons as Gasoline with BTEX and MTBE* <br /> Extraction method SW5030B Analytical methods SW8021B/8015Crn Work Order 0210564 <br /> Lab iD Client LD IV TPH{g) MTBE Benzene Toluene Ethylbenzene Xylenes DF %SS <br /> 001A P-36/25' W ND,t ND ND ND ND 1 998 <br /> 002A P-36/50' W ND,i __ ND ND ND ND 1 105 <br /> 003A P-38/25' W ND,i ND 066 ND 078 1 102 <br /> 004A P-38/50' W ND i _— ND 1 0 ND ND 1 104 <br /> I <br /> I <br /> Reporting Limit for DF=1 fly 50 50 05 0 5 fl y 0 5 1 µglL <br /> ND means not detected at or <br /> above the reporting lurul S NA NA NA NA NA NA 1 mg/Kg <br /> "water and vapor samples are reported in ug/L,soil and sludge samples in mg/kg wipe samples in ug/wipe,product/oil/non-aqueous liquid samples in <br /> mg/L and TCLP extracts in ug/L <br /> #cluttered chromatogram sample peak coelutes with surrogate peak <br /> +The following descriptions of the TPH chromatogram 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 significant(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 gasoline?,e)TPH pattern that does not appear to be derived from gasoline(stoddard solvent) f)one to a few isolated non-target peaks present,g) <br /> strongly aged gasoline or diesel range compounds are significant,h)lighter than water immiscible sheen/product is present i)liquid sample that contains <br /> greater than–2 vol %sediment,j)reporting limit raised due to high MTBE content k)TPH pattern that does not appear to be derived from gasoline <br /> aviation as m)no rico izable attem <br /> DHS Certification No 1644 Edward Hamilton, Lab Director <br />