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1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232 9600 <br /> m%W Analytical FAX(650)232 labs 612 <br /> con <br /> ' www sequocalabs corn <br /> #r-Ryan/GeoStratepies(I) Project Unoca](4) L208029 <br /> Stena CourL Suite J Project Number Former Unocal#2859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Total Purgeable Hydrocarbons (C6-00) by EPA 8015B modified, BTEXM by EPA 8021B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analvte Result Limit Units Dilution Batch Prepared Analvzed Method Notes <br /> MW-10(L208029-101 Water Sampled 08/10/021525 Received 08/11/02 11 30 <br /> Gasoline Range Organics(C6-C10) 93000 50000 ug/l 1000 2H23003 08/23/02 08/23/02 8015Bm/8021B HC-21 <br /> Benzene 3600 500 " <br /> Toluene 21000 500 <br /> Ethylbenzene 4300 500 " <br /> Xylenes(total) 27000 500 " <br /> Methyl tart-butyl ether ND 2500 <br /> Surrogate aa a-Trif7uorotoluene 9.51 % 70-130 " <br /> ]%IW-11 (L208029-1])Water Sampled 08/10/02 14 50 Received 08/11/02 11 30 <br /> Gasoline Range Organics(C6-C70) 23000 5000 ug/1 100 2H22004 08/22/02 08/23/02 8015Bm/8021B HC-21 <br /> Benzene 560 50 <br /> Toluene 130 50 <br /> Ethylbenzene 1500 50 " <br /> Xylenes(total) 6400 50 " <br /> Methyl Cert-butyl ether 320 250 " <br /> MV ate a,a,a-Triuorotoluene 951 % 70-130 " <br /> -12 (1-208029-12)Water Sampled 08/10/02 13 37 Received 08/11/02 11 30 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug.A I 2H23003 08/23/02 08/23/02 SO15Btn/8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 34 0 50 " <br /> Methyl ter!-butyl ether ND 25 <br /> Surrogate a,a a-Triuorotoluene 107% 70-130 " <br /> So to 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 10 of 25 <br />