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885 Jarvis Dr <br /> Sequoia Mogan Hill,CA 95037 <br /> i (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.scquoialabs.com <br /> tratus Environmental lnc. Project: ARCO#5469,Stockton,CA MLK0837 <br /> 30 ameron Park Dr., Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: lay Johnson 12/23/02 10:37 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> CPTI-52-S(MLK0837-01)Soil Sampled: 11/21/02 10:15 Received: 11/21/02 15-45 <br /> tert-Butyl alcohol ND 50 ug/kg 2.48 �2K30002 11/30/02 12/01/02 EPA 8260B 0-09 <br /> Methyl tert-butyl ether 1.9 1.2 " " <br /> Di-isopropyl ether ND 1.2 " " <br /> Ethyl tert-butyl ether ND 1.2 <br /> tert.amyl methyl ether ND 1.2 0-09 <br /> 1,2-Dichloroethane ND 1.2 <br /> Surrogate: 1,2-Dichloroethane-d4 87,4% 60-140 <br /> CPTI-62-W(MLK0837-02)Water Sampled: 11/21/02 10:30 Received: 11/21/02 15:45 <br /> tert-Butyl alcohol ND 20 ug/l I 2LW34 12/05/02 12/05/02 EPA 9260B <br /> Methyl tert-bury] ether ND 0.50 " <br /> Di-isopropyl ether 1.2 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 <br /> tert-Amyl methyl ether ND 0.50 <br /> 1,2-Dichlo ro ethane 1.3 0.50 " <br /> rogate. 1,2-Dichloroethane-d4 108% 76-129 11 11 " <br /> 1-72-W(MLK0837-031 Water Sampled: 11/21/02 11:10 Received: 11/21/02 15:45 <br /> tert-Butyl alcohol ND 20 ug/i 1 2LO4034 12/05/02 12/05/02 EPA 8260B <br /> Methyl tert-butyl ether ND 0.50 <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.54 " <br /> tert-Amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Surrogate_ 1,2-Dichloroethane-d4 105% 78-129 11 " " <br /> Sia Analytical-Morgan Hill 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 5 of 13 <br />