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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 /> 24 1 Website www mccampbell com E-mail umin@ iccampbell cam <br /> Advanced GeoEnvironmental,Inc Client Project ID Flag City Chevron Date Sampled 06/30/05 <br /> 837 Shaw Road Date Received 07/01/05 <br /> Client Contact Tim Cuellar Date Extracted 07104105-07106105 <br /> Stockton, CA 95215 <br /> Client P O Date Analyzed 07104105-07106105 <br /> Gasoline Range(C&C12) Volatile Hydrocarbons as Gasoline* <br /> Extraction method SW5030B Analytical methods SW8015Cm Work Order 0507002 <br /> Lab[D Client ID Matnx TPH(g) DF %SS <br /> 017A MW19A W ND 1 100 <br /> 018A MW19B W ND 1 115 <br /> Reporting Limit for DF=1, W 50 pg/L <br /> ND means not detected at or <br /> above the reporting limit S NA NA <br /> 'water and vapor samples and all TCLP&SPLP extracts are reported in ug/L,soil/sludge/solid samples in mg/kg, wipe samples inµg/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 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 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 gasolmel,e)TPH pattern that does not appear to be derived from gasoline(stoddard solvent I mineral spint'y),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 /> denved from gasoline(aviation gas) m)no recognizable pattern,n)TPH(g)range non-target isolated peaks subtracted out of the TPH(g)concentration at <br /> the client's request <br /> DHS Certification No 1644 Angela Rydelius, Lab Manager <br />