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II 10 2nd Avenue South,#D7,Pacheco,CA 94553-5560 <br /> MICA DBELL ANALYTICAL INC Telephone 925-798-1620 Fax 925-798-1622 <br /> http//www.mccamohell co m E-mail main@mccampbell com <br /> Advanced GeoEnvironmental Client Project ID West Clay Properties Date Sampled 05/28/99 <br /> 4005 North Wilson Way Date Received 05/29/99 <br /> Stockton,CA 95205 Client Contact Kevin McKibben Date Extracted 05/230-06/03/99 <br /> Client P O Date Analyzed 05130-06103199 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,with Methyl tert-Butyl Ether* &BTEX* <br /> EPA methods 5030,modified 8015,and 8020 or 602,California RWQCB(SF Bay Region)method GCFID(5030) <br /> Lab ID Client ID Matnx TPH(g)+ MTBE Benzene Toluene Ethylben- Xylenes %Recovery <br /> zene Surrogate <br /> 12362 MW-1/ W 3900,a ND<10 1100 56 290 260 115 <br /> 5-28-99 <br /> 12363 MW-2/ W 21,000,a ND<50 2500 1900 620 3700 102 <br /> 5-28-99 <br /> 12364 MW-3/ W 160,a NO 17 9 1 84 21 100 <br /> 5-28-99 <br />' 12365 MW-4/ W NO NO NO NO NO NO 97 <br /> 5-28-99 <br /> 12366 MW-5/ W NO NO ND NO NO NO 100 <br /> 5-28-99 <br /> 12367 MW-6A/ W NO NO NO NO NO NO 100 <br /> 5-28-99 <br /> 12368 MW-6$/ W NO NO NO NO NO NO 102 <br /> 5-28-99 <br /> lie <br /> 12369 MW-7/ W NO NO NO NO NO NO 98 <br /> 5-28-99 <br /> 12370 MW-8A/ W NO NO NO NO NO NO 101 <br />' 5-28-99 <br /> 12371 MW-8B/ W NO NO NO NO NO NO 102 <br /> 5-28-99 <br /> I <br /> I Reporting Limit unless W 50 ug/L so 05 05 05 05 <br /> otherwise stated,ND <br /> means not detected above <br /> the reporting limit $ g S ] 0 mg/kg 005 0 005 0 005 0 005 0 005 <br />' <br /> M water and vapor samples are reported in ug/L,wipe samples in ug/wipe,soil and sludge samples in mg/kg,and all TCLP and SPLP extracts <br /> 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 <br /> interpretation a) unmodified or weakly modified gasoline is significant, b) heavier gasoline range compounds are significant(aged <br /> gasoline ), c) lighter gasoline range compounds (the most mobile fraction) are significant, d) gasoline range compounds having broad <br /> chromatographic peaks are significant,biologically altered gasohnel,e)TPH pattern that does not appear to be derived from gasoline(1),f) <br /> one to a few isolated peaks present,g)strongly aged gasoline or diesel range compounds are significant,h)lighter than water immiscible <br /> sheen is present,i)liquid sample that contains greater than—5 vol %sediment,j)no recognizable pattern <br />' DHS Certification No 1644 Edward Hamilton, Lab Director <br />