ARCHIVED REPORTS_XR0005707 CASE 2

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1455 McDowell Blvd,North Ste D Sequoia Petaluma,CA 94954 a- ) FAX(707)792 792 0334242 r 1865 10 www sequoialabs corn URS Corp-Sacramento Project Arco Site 6020,Manteca,CA P307344 2870 Gateway Oaks Drive Suite 300 Project Number WR36616 Reported Sacramento CA,95833 Project Manager Vernon P Elarth 07/28/03 16 58 Industrial Solvents by EPA Method 8015B modified Sequoia Analytical-Morgan Hill Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes MW-11-20(P307344-02)Soil Sampled 07/15/03 08 35 Received 07/16/03 13 45 Methanol ND 10 mg/kg 1 3G23029 07/23/03 07/24/03 EPA 801513m Surrogate 1 pentanol 110% 67-171 " MW-11-25(P307344-03)Sod Sampled 07/15/030840 Received 07/16/03 13 45 Methanol ND 10 mg/kg 1 3G23029 07/23/03 07/24/03 EPA 801513m Surrogate 1-pentanol 840% 67-171 " MW-11-30(P307344-04)Soil Sampled 07/15/030845 Received 07/16/03 13 45 Methanol ND 10 mg/kg 1 3G24020 07/24/03 07/24/03 EPA 8015Bm Surrogate 1-pentanol 88 4 Vo 67-171 " MW-12-20(P307344-06)Soil Sampled 07/15/03 10 20 Received 07/16/03 13 45 Methanol ND 10 mg/kg 1 3G23029 07/23/03 07/24/03 EPA 8015Bm rrogate I-pentanol 71 2% 67-171 " MW-12-30(P307344-07)Soil Sampled 07/15/03 10 30 Received 07/1fi/03 13 45 Methanol ND 10 mg/kg 1 3G23029 07/23/03 07/24/03 EPA 8015Bm Surrogate I-pentanol 796% 67-171 IF " MW-12-35(P307344-08)Soil Sampled 07/15/03 10 35 Received 07/16/03 13 45 Methanol ND 10 mg/kg 1 3G24020 07/24/03 07/24/03 EPA 8015Bm Surrogate I-pentanol 81 6% 67-171 " MW-13D-20(P307344-10)Soil Sampled 07/15/03 13 40 Received 07/16/03 13 45 Methanol ND 10 mg/kg 1 3G23029 07/23/03 07/24/03 EPA 8015Bm Surrogate I-pentanol 728% 67-171 IF " equoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain 41of cuslody document Unless otherwise stated,results are reported on a wet weight 1 basis This analytical report must be reproduced in its entirety Page 3 of 14