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a— ) (4885 7arvls Dr <br /> Sequoia Margin Hill,CA 95037 <br /> Analytical FAX <br /> 08)7 - 600 <br /> 408 78282-6308 <br /> www.sequoialabs.com <br /> tratus Environmental Inc. Project: ARCO#5469,Stockton,CA MLL0441 <br /> 30 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 01/07/03 12:15 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical-Morgan Mill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5(MLL0441-05)Water Sampled: 12/11/02 08:23 Received: 12/11/02 12:00 <br /> Benzene _ ND 25 ugll 50 2LZ0026 12/19/02 12/20/02 EPA 8260B <br /> Toluene ND 25 " <br /> Ethylbenzene ND 25 " <br /> Xylenes(total) ND 25 " <br /> Surrogate:1,2-Dichloroethane-d4 113% 78-129 " <br /> MW-6(MLL0441,06)Water Sampled: 12/11/02 09:43 Received: 1211110212:00 <br /> Benzene ND 1000 ug/1 2000 2L20026 12/19/02 12/20/02 EPA 8260B <br /> Toluene ND 1000 <br /> Ethylbenzene ND 1000 " <br /> Xylenes(total) ND 1000 " <br /> Surrogate: 1,2-Dichloroethane-d4 117% 78-129 " <br /> MW-7(MLL0441-07)Water Sampled: 12/1.1102 04:45 Received: 12/11/0212:00 <br /> Benzene 1.2 1.0 ug/1 2 2L24008 12/24/02 12/24/02 EPA 8260E <br /> Toluene ND 1.0 " <br /> ylbenzene ND 1.0 <br /> Imes(total) 1.9 1.0 " <br /> Surrogate:1,2-Dichloroethane-d4 118% 78-129 " <br /> MW-8(MLL0441-08)Water Sampled: 12/11/02 05:58 Received:12/11/02 12:00 <br /> Benzene 9600 250 ug/1 500 2L24008 12/24/02 12/24/02 EPA 8260B <br /> Toluene ND 250 " <br /> Ethylbenzene ND 250 " <br /> Xylenes(total) ND 250 " <br /> Surrogate: 1,2-Dichloroethane-d4 117% 78-129 " <br /> opoia 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 20 <br />