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885 Jarvis Dr <br /> Sequoia Mapn Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-008 <br /> www.sequoialabs.can <br /> tratus Environmental Inc. Project: ARCO#5469,Stockton,CA MLK0837 <br /> 330 Cameron Park Dr.,Suite 550 Project Number: ARCO 45469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay 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-91-W(MLK0837-04)Water Sampled. 11/21/02 11:50 Received: 11/21/02 15:45 <br /> tart-Butyl alcohol ND 20 ug/1 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 0.50 " <br /> ter -Amyl methyl ether NTD 0.50 <br /> 1,2-Dichloroethane ND 0,50 „ <br /> Surrogate:42-Dichloroethane-d4 104% 78-1.29 <br /> CPT1-103-W(MI,K0837-05)Water Sampled: 11/21/02 12:55 Received: 11/21/02 15:45 <br /> tett-Butyl alcohol ND 20 ug/1 1 2LO4034 12/05/02 12/05/02 EPA 8260E <br /> Methyl tort-butyl ether 1.7 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 <br /> tert-Amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND Q.50 <br /> rogate: 1,2-Dichloroethane-d4 104% 78-129 <br /> 1-107-S(MLK0837-06)Soil Sampled: 11/21/02 13:50 Received. 11/21/02 15:45 <br /> tert-Butyl alcohol ND 52 ug/kg 2.58 2K30002 11/30/02 12/01/02 EPA 8260B 0-09 <br /> Methyl tert-butyl ether ND L3 <br /> Di-isopropyl ether ND 1.3 <br /> Ethyl tert-butyl ether ND 1.3 <br /> tert-Amyl methyl ether ND 1.3 0-09 <br /> 1,2-Dichloroethane ND 1.3 <br /> Surrogate: 1,2-Dichloroethane-d4 90.4% 60-140 <br /> ola 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 6 of 13 <br />