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t110 2nd Avenue South #D7,Pacheco,CA 94553-5560 <br /> McCampbelI Analytical Inc Telephone 925-798-1620 Fax 925-798-1622 <br /> http Ihvww mccamphell com E-mail main@mccampbell com <br /> Advanced GeoEnvironmental, Inc 1 Client Project ID West Clay Properties Date Sampled 09/03/02 <br /> • 837 Shaw Road Date Received 09/04/02 <br /> Stockton,CA 95215 Client Contact Paul Dotson Date Extracted 09/06/02-09/07/02 <br />' Client P O Date Analyzed 09/06/02-09/07/02 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline with BTEX and MTBE* <br /> Extraction method SW503013 Analytical methods SW8021B/8015Cm Work Order 0209018 <br /> Lab ID Client 1D Matrix TPH(g) MTBE Benzene Toluene Ethylbenzene Xylenes DF %SS <br /> 017A MW13A/090302 W ND 10 ND ND ND ND 1 993 <br />' 018A MW1313/090302 W ND 22 ND ND ND ND 1 996 <br /> 019A EW-1/09-03-02 W 50,000,a,h 420 1700 6500 2200 9100 50 118 <br />' 020A F-W-2/09-03-02 W 1500,a ND<25 68 20 99 110 5 —# <br /> 1 <br /> 1 <br /> Reporting Lumt for DF=t W 50 so 05 05 05 05 1 lig/L <br />' ND means not detected at or <br /> above the reporting limit 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/o11/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 signeficant(aged gasolme9),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 gasoline9,e)TPH pattern that does not appear to be derived from gasoline(stoddard solvent),f)one to a few isolated non-target peaks present, <br /> S)strongly aged gasolene or diesel range compounds are significant,h)lighter than water immiscible sheen/product is present,i)liquid sample that <br />' contains greater than—2 vol %sediment,l)reporting limit raised due to high MTBE content,k)TPH pattern that does not appear to be derived from <br /> gasoline(aviation gas) m)no recognizable pattern <br />' DHS Certification No 1644 I, Edward Hamilton,Lab Director <br />