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� 1 <br /> 1551 lndustnai Road <br /> Sequoia San CarlusCA9407a <br /> PO%� <br /> Analytical FAX(650)232-9600 <br /> — (650)232-9612-- <br /> www sequacalabs Com <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco#01205(Circle K),Lathrop Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/13/02 09 26 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE 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 04129102_12 35 Received 04/29/02 17 20 <br /> Purgeable Hydrocarbons as Gasoline 2500 250 ug/1 5 2050019 05/09/02 05/10/02 EPA 8021B P-02 <br /> Benzene 13 25 <br /> Toluene ND 25 " <br /> Ethylbenzene 120 25 " <br /> Xylenes(total) 23 25 <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate a,a,a-Trifluorololuene 107% 70-130 <br /> MW-4 (1-204130-05)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 8021B P-02 <br /> Benzene 7 8 050 <br /> Toluene 070 0 50 " <br /> Ethylbenzene 24 0 50 " <br /> Xylenes(total) 6 2 050 " <br /> Methyl tert-butyl ether 5 9 5 0 <br /> Surrogate a,a,a-Tnlluorotoluene 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 ugA T400 2050018 05/09/02 05/09/02 EPA 8021E P-02 <br /> Benzene ND 200 <br /> Toluene 1300 200 " <br /> Ethylbenzene 3900 200 " <br /> Xylenes(total) 22000 200 " <br /> Methyl tert-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 77ils analytical report must be reproduced in its entirety <br /> Page 3 of 14 <br />