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D Sequoia 1551 Industrial Road <br /> San Carlos CA 94070 <br /> Analytical (650)232 9600 <br /> FAX(650)232 9612 <br /> www sequoialabs com <br /> pr-Ryan/Geostrategles(I) Project Tosco(1) <br /> Sierra Court, Suite J Project Number Unocal SS#08671,Stockton,CA Reported <br /> Dublin CA,94568 Protect Manager Deanna Harding 02/28/02 11 15 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3(L202080-041 Water Sampled 02/12/02 16 25 Received 02/13/02 07 35 <br /> Purgeable'Hydrocarbons(C6-C12) ND 50 ug/l 1 2B20001 02/20/02 02/20/02 EPA <br /> Benzene 13 050 801SM/8021 <br /> Toluene 097 050 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) 0 85 0 50 <br /> Methyl tert-butyl ether(MTBE) 4 3 2 5 02/21/02 Q-28c,QR-0 <br /> 4 <br /> Surrogate a a a-Trifluorotoluene 113 % 70-130 OF 02120102 " <br /> AIW-4(L202080-05)-Water Sampled 02/12/02 IS 00 Received 02/I3/02 07 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 200 ugfl 4 2820001 02/22/02 02/22/02 EPA <br /> 8015M/8021 <br /> Benzene ND 2 0 1. 1. " " <br /> Toluene ND 2 0 <br /> EAfienzene ND 2 0 " <br /> Ws(total) _ ND 2 0 <br /> Surrogate a a a-Trifluorotoluene 125% 70-130 OF " <br /> MW-4(L202080-05RE1)„Water Sampled 02112/07 18 00 Received 02/13/02 07 35 <br /> Methyl tert-butyl ether(MTBE) 920 25 ug/I 10 2B20001 02/20/02 02/20/02 EPA Q_2$ <br /> 8015M18021 <br /> Surrogate a a a-Trifluorotoluene 122% 70430 ” " OF r <br /> MW-5(L202080-06)Water „Sampled 02/12/02 15 20 Received 0_2/13/02 07 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ugll I 2B20001 02/20/02 02/20/02 EPA <br /> 8015M/8021 <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tent-butyl ether(MTBE) ND 2 5 <br /> Surrogate aa a-Trifluorotoluene 109% 70-130 OF OF OF <br /> Slea Analytical-San Carlos <br /> Yt The,esults in this,epoi t apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical i epos t must be reproduced to its entu ety <br /> Page 6 of 16 <br />