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1551 Industrial Road <br /> Sequoia San Carlos CA 94074 <br /> (650)232 9600 <br /> Analytical FAX(650)2329612 <br /> www sequolalabs com <br /> Oblin <br /> er-Ryan/Geastrategles(1) Project Unoca](4) <br /> Sierra Court,Suite J ProicctNumber Former Unocal#/5098&Montgmery Ward Reported CA,94568 Project Manager Deanna Harding 03/26/02 12 44 <br /> Tentatively Identified Compounds by GC/MS <br /> Sequoia Analytical - San Carlos <br /> Reporttng <br /> 7A,,Iytc Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> IM-23S L203015-29 Water Sampled 03/04/02 11 53 Received 03/05/02 18 25 <br /> -Butanone 160000 500 ug/l 500 2030023 03/14/02 03/14/02 EPA 8260B <br /> Ethanol 250000 500 <br /> 7231) <br /> hdrofuran 22000 500 <br /> L203015-30Water Sampled 03/04/02 12 55 Received 03/05/02 18 25 <br /> Butanone 59000 500 ug/1 500 2030023 03/14/02 03/14/02 EPA 82608 <br /> etrahydrofuran 8500 500 11 1. 1. 11 " <br /> MW-24S(L203015-31 Water Sampled 03/03/021543 Received 03/05/02 18 25 _ <br /> cutane 2 4 1 0 ug/1 1 2030017 03/08/02 03/13/02 EPA 8260B <br /> yclopentane 11 10 <br /> yclopentene 1 4 1 0 <br /> Methyl butane 1 4 1 0 <br /> ethyl Pentene 1 6 1 0 <br /> entane 2 5 1 0 " <br /> Pentene 1 7 1 0 <br /> yl benzene 1 1 1 0 <br /> hyl benzene 2 7 1 0 <br /> MW-24D(L203015-32)Water Sampled 03/03/02 14 15 Received 03/05/02 18 25 <br /> Io TLCs found ND 1 0 ug/l 1 2030017 03/08/02 03/12/02 EPA 8260B <br /> W-25S (L203015-33)Water Sampled 03/04/02 11 40 Received 03/05/0218 25 <br /> 2-Butanone 120 2 0 ug/l 2 2030023 03/14/02 03/14/02 EPA 8260B <br />,etrabydrofuran 140 2 0 <br /> Sa Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br />' Page 14 of 91 <br />