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885 Jarvis Dr <br /> Sequoia MQgtn Hill,CA 95037 <br /> (408)776-9600 <br /> AnalyticaE <br /> FAX(408)762-6306 <br /> www.sequoialabs.ccrn <br /> 'us <br /> 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,956$2 Project Manager: Jay Johnson 02/11/03 14:07 <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 /> MW-1 MMA0406-01 Water Sampled: 01/14/03 07:47 Received:01/14/03 10:30 <br /> tert-Butyl alcohol ND 20-, ug/l 1 3A25001 01/23/03 01/24/03 EPA 8260E <br /> Methyl tert-butyl ether 7.3,/ 0.50 " <br /> Di-isopropyl ether ND 0.50v <br /> Ethyl tert-butyl ether ND 0.50' <br /> tert-Amyl methyl ether ND 0.50-/ " <br /> Surrogate: 1,2-Dichloroethane-d4 94.0% 78-119 " <br /> MW-2 MMA0406-02 Water Sampled:01/14/03 08:54 Received:01/14/03 10:30 <br /> tert-Butyl alcohol ND 20-/ ug/I I 3A25001 01/23/03 01/24/03 EPA 820013 <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 /> Surrogate: <br /> ,50•Surrogate: 1,2-Dichloroethane-d4 94.2% 78-129 <br /> W-3 MMA0406-03 Water Sampled: 01/14/03 08:33 Received:01/14/03 10:30 <br /> utyl alcohol ND 20 ug/l l 3A25001 01/23/03 01/24/03 EPA 82603 <br /> ethyl tort-butyl ether 2.0- 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 /> Surrogate: 1,2-Dichloroethane-d4 93.0% 78-129 " <br /> MW-4(MMA0406-04)Water Sampled: 01/14/03 07:36 Received:01/14/03 10:30 <br /> tert-Butyl alcohol ND 10000 , ug/1 500 3A24037 01/24/03 01/25/03 EPA 826013 <br /> Methyl tert-butyl ether 13000 250 " <br /> Di-isopropyl ether ND 250- <br /> Ethyl <br /> 50`Ethyl tert-butyl ether ND 250 <br /> tent-Amyl methyl ether ND 250 " <br /> Surrogate: 1,2-Dichloroethane-d4 870% 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 /> 8 of 34 <br />