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Sequoia ass Jarvis a— —) Maga❑Hill,CA 95037 �n a gj yfl c a (408)776-9300 FAX(408)782-6308 www.sequoialabs.com tclm us Environmental Inc. Project: ARCO#5469,Stockton,CA MLK0837 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469, Stockton,CA Reported: eron Park CA,95682 Project Manager: Jay Johnson 12/23/02 10:37 Volatile Organic Compounds by EPA Method 8260B Sequoia Analytical- Morgan Hill Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes CPT1-52-5 MLK0837-01 Soil Sampled: 11/21/0210:15 Received: 11/21/02 15:45 tart-Butyl alcohol ND 50 ug/kg 2.48 2K30002 11/30/02 12/01/02 EPA 8260B 0-09 Methyl tert-butyl ether 1.9 1.2 Di-isopropyl ether ND L2 Ethyl tert-butyl ether ND 1.2 tert-Amyl methyl ether ND 1.2 0-09 1,2-Dichloroethane ND 1.2 Surrogate: 1,2-Dichloroethane-d4 874 % 60-140 " CPT1-62-W(MLK0837-02)Water Sampled: 11/21/02 10:30_Received: 1112110215_:4_5 tert-Butyl alcohol ND 20 ug/1 l 2LO4034 12/05/02 12/05/02 EPA 8260B Methyl tent-butyl ether ND 0.50 Di-isopropyl ether 1.2 0.50 Ethyl tent-butyl ether ND 0.50 tert-Amyl methyl ether ND 0.50 1,2-Dichloroethane 1.3 0.500 ogate: 1,2-Dichloroethane-d4 108% 78-129 " 1-72-W(MLK0837_-03)Water Sampled: 11/21/02 11:10 Received: 11/21/02 15:45 tert-Butyl alcohol ND .20 ug/l 1 2LO4034 12/05/02 12/05/02 EPA 8260B Methyl tert-butyl ether ND 0.50 Di-isopropyl ether ND 0.50 Ethyl tert-butyl ether ND 0.50 tert-Amyl methyl ether ND 0.50 1,2-Dichloroethane ND 0.50 Surrogate: 1,2-Dichloroethane-d4 105% 78-129 " oia Analytical-Morgan Hill 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 5 of 13