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((�qq 885 Jarvis Dr <br /> a_ _� Sequoia Marpn Hill,CA 95037 <br /> TQff (408)776-6300 <br /> Analyfi c <br /> FAX(4087B2-6308 <br /> www.sequoialabs.ccrn <br /> tus Environmental Inc. Project: ARCO#5469,Stockton,CA MLK0837 <br /> 0 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,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 /> CPT/-91-W MLK0837-04 Water Sampled: 11/21/0211:50 Received:11/21/0215:45 <br /> tert-Butyl alcohol ND 20 ug/1 I 2LO4034 12/05/02 12/05/02 EPA 8260E <br /> Methyl tert-butyl ether ND 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 0,50 <br /> Surrogate:1,2-Dichloroethane-d4 104% 78-129 <br /> CPT/-103-W MLK0837-05 Water Sampled: 11/21/0212:55 Received: 11/21/0215:45 <br /> tert-Butyl alcohol ND 20 ug/l I 2LO4034 12/05/02 12/05/02 EPA 8260B <br /> Methyl tert-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 0.500 <br /> ogale:1,2-Dichloroethane-d4 104010 78-129 <br /> 1-107-5 . LK0837-06 Soil Sampled: 11/21/0213.50 Received: 11/21/0215:45 <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 1.3 <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 /> oia 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 />