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Indu <br /> 1551 RoadSequo1a San Carlos,CA 94070 <br /> (650)232-9600 <br /> a_ _� <br /> Analytical FAX(650)2329612 <br /> www sequoialabs corn <br /> ler-Ryan/Geostrategres(l) Project Unocal(4) L208033 <br /> 7 Sierra Court, Suite J Project Number Former Unocal 40187 Stockton Reported <br /> Dublin CA 94568 Project ManaBer Deanna Harding 08/29/02 07 10 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> QA (L208033-01)Water Sampled 08/12/020000 Received:08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l 1 2H21003 08121102 08/21/02 8015Bm/8021B <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylberizene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl Cert-butyl ether ND 2 5 ^ " <br /> Surrogate a a a-Trifluorotoluene 115% 70-130 " <br /> U-1 (L208033-02)Water Sampled 08/13/02 17 25 Received08/14/02 1955 _ <br /> Gasoline Range Organics(C6-C10) 320 T 50 ug/1 1 21-121002 08/21/02 - 08/22/02 801511ra/8021B <br /> Benzene 6.3 0 50 ^ " ^ <br /> Toluene 060 050 ^ ^ <br /> £thylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether 6 1 25 ^ <br /> I <br /> gate a a,a-Trrfluorotoluene 115% 70-130 " <br /> L208033-03 Water Sampled 08/13/02 16 25 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C70) 77 50 ug/l 1 21-121003 08/21/02 08/22/02 8015Brn/8021B HC-12 <br /> Benzene 0 58 0 50 ^ " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 ^ " <br /> Xylenes(total) ND 050 ^ <br /> Methyl ter#-butyl ether ND 2 5 <br /> Surrogate a a a-Triuorololuene 120% 70-130 " <br /> ]a Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 36 <br />