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1455 McDow <br /> Sequoia Petaluma,CA 94954ell Blvd,North Ste 4 <br /> (707)792-1665 <br /> ► Analytical FAX(707)792-0342 <br /> Wwww sequoialabe coni <br /> URS Corp-Sacramento Project BP Hentage Site 11191,Stockton,Ca P304289 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/25/03 17 26 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> An Result Lund Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(P304289-01)Water Sampled 04/10/03 12 45 Received 04/11/03 14 30 _ <br /> Methyl tert-butyl ether 4900 100 u9A 200 3040597 04/24/03 04/24/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 94% 84-122 " <br /> MW-2(P304289-02)Water Sampled 04/10/03 12 20 Received 04/11/0314 30 <br /> Methyl tert-butyl ether 3900 50 ug/1 100 3040597 04/24/03 04/24/03 EPA 8260B <br /> Surrogate Dabromofluoromethane 80% 84-122 "^ S-LIM <br /> MW-3(P304289-03)Water Sampled 04/10/03 13 50 Received 04/11103_ 14 30 <br /> Methyl tert-butyl ether 25000 500 ug/1 .- 1000 3040597 04/24/03 04/24/03 EPA 8260B -. <br /> Surrogate Dabromofluoromethane 96% 84-122 " <br /> MW-4 304289-04 Water Sampled 04/10/03 12 00 Received 04/11/03 14 30 <br /> Methyl tert-butyl ether 17000 5000 ug/l 10000 3040629 04/24/03 04/24/03 EPA 8260B <br /> Surrogate Dabromofluoromethane 93% 84-122 " <br /> MW-5 P304289-0 Water Sampled 04/10/03 11 40 Received 04/11/03 14 30 <br /> IlWethyl tert-butyl ether 1900 25 ug/l 50 3040597 04/24/03 04/24/03 EPA 82603 <br /> .Surrogate Dabromofluoromethane 91 % 84-122 11 " <br /> 11 <br /> �Sequoia Analytical-Petaluma — 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 6 of 10 <br />