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iT E■ <br /> 1102nd Avenue South #D7 Pacheco CA 94553-5560 <br /> McCampbell Inc.Analytical, Telephone 925-798 1620 Fax 925-798 1622 <br /> Website www mccampbell com E-mail main®mccampbell corn <br /> Advanced GeoEnvironmental, Inc Client Project ID West Clay-Ozone BST Date Sampled 04/05/05 <br /> 837 Shaw Road Date Received 04/05/05 <br /> Client Contact Bill Little Date Extracted 04/05/05 <br /> Stockton,CA 95215 <br /> Client P O Date Analyzed 04/12/05 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline with BTEX and MTBE* <br /> Fxtraction method SW5030B Analytical methods SW8021B/8015Cm Work Order 0504049 <br /> Lab M Client @ Matrix TPH(g) MTBE Benzene Toluene Ethylbenzene Xylenes DF %SS <br /> 011A N_Sparged_W S ND ND ND ND ND ND l 107 <br /> • <br /> Reporting Limit for DF=1, W NA NA NA NA NA NA 1 ug/L <br /> ND means not detected at or <br /> above the reporting limit S 20 01 001 0 01 001 001 1 mg/Kg <br /> *water and vapor samples and all TCLP&SPLP extracts are reported in Ag/L,soil/sludge/solid samples in mg/kg, wipe samples inµg/wipe, <br /> prod uctloillnon-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 sign ificant(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/mineral spint'7),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,1)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) 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 1644i1�[Angela Rydelius, Lab Manager <br />