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Sequoia an Industrial Road <br /> a— ) San CarlosCA 94070 <br /> (650)232-9600 <br /> Analytical FAX(650)232.9612 <br /> J www.sequoi alabs.com <br /> � tier-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6047 Sierra Court,Suite J Project Number: Tosco#11195,Lathrop,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 12/10/01 19:11 <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 /> MWA0(L711147-10)Water Sampled: 11/21/01 10:50 Received: 11/21/01 18:15 <br /> Purgeable Hydrocarbons as Gasoline ND 1200 ug/l 25 1120009 12/04/01 12/05/01 EPA 8021B <br /> Benzene ND 12 <br /> Toluene ND 12 <br /> Ethylbenzene ND 12 " <br /> Xylenes(total) ND 12 <br /> Methyl tert-butyl ether 22000 1200 250 M-04 <br /> Surrogate:a,a,a-Tri�luorotoluene 99.3% 70-130 " <br /> MW-11 (L111147-11)Water Sampled: 11/21/01 13:13 Received: 11/21/01 18:15 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 1120009 12/04/01 12/05/01 EPA 80218 <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 <br /> Methyl tent-butyl ether 540 50 10 M-04 <br /> C.4 ?sate:a,a,a-Trijrluorotoluene 107% 70-130 " <br /> MW-12(L111147-12)Water Sampled: 11/21/01 12:45 Received: 11/21/01 18:15 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 1120009 12/04/01 12/04/01 EPA 8021B <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xyienes(total) ND 0.50 <br /> Methyl tert-butyl ether ND 5.0 " <br /> Surrogate:a,a,a-Triuorololuene 94.8% 70-130 " <br /> S: y? <br />