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l Road <br /> Sequoia an Carlos CA 94070 <br /> San Carlos CA 94070 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> r-Ryan/Geostrateptes(l) Project Tosco(]) <br /> Sierra Court, Suite l Project Number Tosco(Unocal)SS46981,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna]-larding 09/27/01 10 19 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analvzed Method Notes <br /> VW-4(L]09080-16)Water Sampled 09112101 14 50 Received 09/13/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline 6900 500 ugll 10 1090096 09/24/01 09/25/01 DHS LUFT P-02 <br /> Benzene 88 5 0 " <br /> Toluene ND 5 0 " <br /> Ethylbenzene 62 so " <br /> Xylenes(total) 230 so " <br /> Methyl tert-butyl ether 240 50 " <br /> Surrogate a,a,a-Trifluorotoluene 102% 70-130 " <br /> VW-7(L109080-17)Water Sampled 09/12/01 16 10 Received 09/13/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline 34000 10000 ug/l 200 1090102 09/25/01 09/25/01 DHS LUFT P-02 <br /> Benzene 870 100 " <br /> Toluene 1800 100 <br /> Ethylbenzene 780 100 " <br /> Xylenes(total) 7900 100 " <br /> Methyl tert-butyl ether ND 1000 " <br /> &IIININguale a,a,a-Triuorotoluene 118% 70-130 " <br /> P -1 (L)09080-18)Water Sampled 09/13/01 15 10 Received 09113/01 19 30 ^� <br /> Purgeable Hydrocarbons as Gasoline - ND 50 u811 1 1090096 09/24/01 09/25/01 DHS LUFT <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl Cert-butyl ether. 15 5 0 " <br /> Surrogate ax a-Triuorotoluene 102% 70-130 " <br /> So la Analytical-San Carlos The results in this report apply to the samples analysed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 7 of 21 <br />