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1551 Industnal Road <br /> Sequoia San Carlos C0 <br /> (650)232 <br /> sz 96o960a <br /> ��► Analytical wwseq(650)232-9612612 <br /> www sequoialabs com <br /> er-Ryan/Geostrategies(1) Project Tosco(1) <br /> Sierra Court,Suite 1 Project Number Tosco#5886,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/06/01 16 51 <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 /> TB-LB(LI11140-01)Water Sampled 11/19/010000 Received 11/20/01 19 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 1120002 12/03/01 12/03/01 EPA 8021E <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 50 <br /> Surrogate a,a,a-Triuorotoluene 958% 70-130 " <br /> MW-1 (L111140-02)Water Sampled 11/20/01 10 56 Received 11/20/01 19 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 I 1120003 12/03/01 12/03/01 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether 1700 100 20 12/04/01 M-04 <br /> ate a,a,a-Triuorotoluene 878% 70-130 12103/01 <br /> _NM-2(LI 11140-03)Water Sampled 11/20/01 11 30 Received 11/20/01 19 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 1120003 12/03/01 12/03/01 EPA 8021 B <br /> Benzene <br /> ND 050 " <br /> Toluene ND 050 n " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " " n " <br /> Methyl tert-butyl ether 3500 250 " 50 12104/01 M-04 <br /> Surrogate a,a,a-Triuorotoluene 870% 70-130 12103/01 " <br /> 1a Analytical- Sail Carlos The results to this report apply to the samples analysed in accordance with the chain of <br /> custody document This analylrcal report must be reproduced in its entirety <br /> Page 2 of 23 <br />