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Sequoia / a Sacramento,CA �/ ker Ave Ste 8 Sacramento,CA 95834 Anal tical (916)921-0100 • � FAX(916)921-0100 www.sequoialabs.com D.K.Barber PE&Associates Project: Western Oil&Spread-Acampo S311112 8710 Mt.Vernon Rd. Project Number: N/A Reported: Auburn CA,95603 Project Manager: Dan Barber 11/21/03 09:26 Extractable Hydrocarbons by EPA 8015B Sequoia Analytical-Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes CPT/HP 1 W.S logs(S311112-01)Water Sampled: 11/05/03 11:43 Received:11/06/03 16:35 Diesel Range Organics(C10-C28) 210 50 ug/l 1 3110255 11/19/03 11/19/03 EPA 8015B HC-12 Surrogate:Octacosane 138% 50-150 " CPT/HP 2 57.5(S311112-02)Water Sampled:11/05/03 12:30 Received:11/06/03 16:35 Diesel Range Organics(C10-C28) 96 50 ug/l 1 3110255 11/19/03 11/19/03 EPA 8015B HC-12 Surrogate:Octacosane 124% 50-150 " CPT/HP 3 52.1(S311112-03)Water Sampled: 11/05/03 13:00 Received: 11/06/03 16:35 Diesel Range Organics(C10-C28) 260 50 ug/l 1 3110255 11/19/03 11/19/03 EPA 8015B HC-12 Surrogate:Octacosane 151% 50-150 S-02 CPT/HP 4 52.5(5311112-04)Water Sampled: 11/05/03 00:00 Received: 11/06/03 16:35 Diesel Range Organics(C10-C28) ND 50 ug/l 1 3110255 11/19/03 11/19/03 EPA 8015B Surrogate:Octacosane 120% 50-150 " CPT/HP 5 53.7(S311112-05)Water Sampled: 11/05/03 16:46 Received:11/06/03 16:35 Diesel Range Organics(C10-C28) 99 50 ug/I 1 3110255 11/19/03 11/19/03 EPA 8015B HC-12 Surrogate:Octacosane 134% 50-150 " Ag Well(S311112-06)Water Sampled: 11/05/03 00:00 Received:11/06/03 16:35 Diesel Range Organics(C10-C28) ND 50 ug/l 1 3110255 11/19/03 11/19/03 EPA 8015B Surrogate:Octacosane 113% 50-150 11 11 11 11 Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of custody document. Unless otherwise stated, results are reported on a wet weight basis. This analytical report must be reproduced in its entirety. Page 3 of 8