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1551 Industrial Road <br /> Sequoia San <br /> oC(rlos C 650)232--90600 <br /> Analytical _ FAX(650)232-9612-- <br /> www sequoialabs com <br /> Gettler-Ryan/Geostratcgies(l) Project Tosco(I) <br /> 6747 Sierra Court, Suite J Protect Number Tosco#01205(Circle K),Lathrop Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05113102 09 26 <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 Analyzed Method Notes <br /> MW-3 (L204130-04)Water Sampled 04/29/02 12 35 Received 04/29/02 17 20 _- <br /> Purgeable Hydrocarbons as Gasoline 2500 250 ug/l 5 2050019 05/09/02 05/10/02 EPA 8021B P-02 <br /> Benzene 13 25 <br /> Toluene ND 25 <br /> Ethylbenzene 120 2 5 " <br /> Xylenes(total) 23 2 5 <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a a,a-Trifluorotoluene 107% 70-130 " <br /> MW-4(L204130-05)Water Sampled 04/29/02 11 25 Received 04/29/02 17 20 _ <br /> Purgeable Hydrocarbons as Gasoline 630 50 ug/l 1 2050019 05/09/02 05/09/02 EPA 8021E P-02 <br /> Benzene 78 050 <br /> Toluene 070 050 <br /> Ethylbenzene 24 050 " <br /> Xylenes(total) 62 050 " <br /> Methyl tert-butyl ether 5 9 5 0 <br /> Surrogate a,a,a-TriJluorotoluene 125% 70-130 " <br /> MW-5 (L204130-06)Water Sampled 04/29/02 14 15 Received 04/29/02 17 20 <br /> Purgeable Hydrocarbons as Gasoline 60000 20000 ug/l 400. 2050018 05/09/02 05/09/02 EPA 8021B P-02 <br /> Benzene ND 200 <br /> Toluene 1300 200 <br /> Ethylbenzene 3900 200 " <br /> Xylenes(total) 22000 206 <br /> Methyl tent-butyl ether ND 2000 " <br /> Surrogate a a a-Trifluorotoluene 800% 70-130 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 14 <br />