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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> FAX Analytical wwseq 7)labsco2 <br /> www sequo�alabs coni <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P409434 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36593 [reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/08/04 09 40 <br /> Industrial Solvents by EPA Method 8015B modified <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Ihlutioa Batch Prepared Analyzed Method Note <br /> MW-8(P409434-08)Water Sampled 09/23/04 04 20 Received 09/23/04 13 15 <br /> Methanol ND 100 ug/1 I 4JO4018 10/04/04 10/04/04 EPA 8015Bm <br /> Surrogate 1 pentanol 93% 62-129 " <br /> VW-1B(P409434-09)Water Sampled 09/23/04 09 20 Received 09/23/04 13 15 <br /> Methanol ND 200 ug/1 1 4JO1006 10/01/04 10/01/04 EPA 8015Bm DF <br /> Surrogate 1 pentanol 88% 62-129 " <br /> VW-2B(P409434-10)Water Sampled 09/23/04 10 07 Received 09/23/04 13 15 <br /> Methanol ND 100 ugfl I 4JO1006 10/01/04 10/01/04 EPA 801513m <br /> Surrogate 1 pentanol 78% 62-129 " <br /> VW-311(P409434-11)Water Sampled 09/23/04 10 55 Received 09/23/04 13 15 <br /> Methanol ND 100 ug/l I 4JO1006 10/01/04 10/01/04 EPA 8015Bm <br /> Surrogate 1 pentanol 98% 62-129 " <br /> Sequoia Analytical -Petaluma 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 /> • <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 21 <br />