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885 Jarvis Dr <br /> Sequoia McrginHill,CA 95037 <br /> (408)776-9600 <br /> Analytical <br /> FAX(408)782-6308 <br /> www.sequoialabs.com <br /> tus Environmental Inc. Project: ARCO#5469, Stockton,CA MMA0406 <br /> 0 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469, Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 02/11/03 14:07 <br /> Volatile Organic Compounds by EPA Method 82601B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5(MMA0406-05)Water Sampled:01114/0308:20 Received: 01/14/03 10:30 <br /> tert-Butyl alcohol ND 2000, ug/1 100 3A24037 01/24/03 � 01/25/03 EPA 8260B <br /> Methyl tert-butyl ether 1500. 50 <br /> Di-isopropyl ether ND 50 v " <br /> Ethyl tent-butyl ether ND 50, <br /> tert-Amyl methyl ether ND 50' <br /> Surrogate: 1,2-Dichloroethane-d4 87.2% 78-129 " <br /> MW-6 MMA0406-06 Water Sampled:01/14/03 08:01 Received: 01/14/03 10:30 <br /> tert-Butyl alcohol ND 40000- ug/1 2000 3A24037 01/24/03 01/25/03 EPA 8260B <br /> Methyl tent-butyl ether 67000v 1000 <br /> Di-isopropyl ether ND 1000` <br /> Ethyl tert-butyl ether ND 1000, " <br /> tert-Amyl methyl ether ND 1000, " <br /> Surrogate: 1,2-Dichloroethane-d4 87.0% 78-129 <br /> MW-7 MMA0406-07 Water Sampled:01/14/03 07:17 Received: 01114/03 10:30 <br /> Iutyl alcohol ND 20- ug/1 I 3A24038 01/24/03 0112.5/03 EPA 8260B <br /> ethyl ter(-butyl ether 1.3 0.50 " <br /> Di-isopropyl ether ND 0.50 <br /> Ethyl ter-butyl ether ND 0,50 <br /> tett Amyl methyl ether ND 0.50• " <br /> Surrogate: 1,2-Dichloroethane44 94.8% 78-129 <br /> MW-8 MMA0406-08 Water Sampled:01/14/03 06:55 Received: 01/14/03 10:30 <br /> tert-Butyl alcohol ND 10000 ugll 500 3A24037 01/24/03 01/25/03 EPA 8260B <br /> Methyl tert-butyl ether 18000 250 " <br /> Di-isopropyl ether ND 250 <br /> Ethyl tert-butyl ether ND 250 <br /> tert-Amyl methyl ether ND 250- <br /> Surrogate: <br /> 50-Surrogate: 1,2-Dichloroethane-d4 88.8% 78-129 " <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 /> 9 of 34 <br />