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110 2nd Avenue South,#D7 Pacheco,CA 94553-5560 <br /> McCampbell Analytical Inc Telephone 925-798-1620 Fax 925-798.1622 <br />' httpl/www mcc beEl coin E-mail ma ca bell com <br /> Advanced GeoEnvlrontnental, Inc Client Project ID Flag City Chevron Date Sampled 03/24/03 <br />' 837 Shaw Road Date Received 03/25/03 <br /> Stockton, CA 95215 Client Contact Tim Cuellar Date Extracted 03126/03-03/27/03 <br />' Client P-0 Date Analyzed 03/26/03-03/27/03 <br /> Gasoline Range(C&C12) Volatile Hydrocarbons as Gasoline* <br /> Extraction method SW5030B Analytical methods SW8021B/8015Cm Work Order 0303417 <br />' lab ID Client D Matrix TPH(g) DF 0 SS <br /> 001A MW7 W ND I 871 <br />' 002A MW9a W ND 1 889 <br /> 003A MW9b W ND 1 884 <br />' 004A MW9c W ND 1 900 <br /> 005A MWlla W ND 1 884 <br />' 006A MWllb W ND 1 861 <br /> 007A MW1 lc W ND 1 857 <br />' 008A MW11d W ND 1 885 <br /> 009A M W 14 W ND 1 878 <br /> lie 0I0A MW 15 W ND 1 897 <br /> 011A EW4 W ND 1 896 <br /> 012A EW8 W ND 1 890 <br /> 013A EW9 W ND 1 894 <br /> I014A EW 10 W ND 1 898 <br /> Reporting Limit for DF�I, W <br /> ND means not detected at or 50 p� <br /> above the reporting limit S NA NA <br /> *water and vapor samples are reported inµg/L,soil and sludge samples in mg/kg,wipe samples in gg/wipe,and TCLP extracts inµg/L <br /> #cluttered chromatogram,sample peak coclutes 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(agcd gasoline9),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/mineral spirit?),0 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—2 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) m)no recognizable pattern <br /> . DHS Certification No 1644 Angela Rydelius, Lab Manager <br />