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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> a— ) (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoiatabs torr¢ <br /> i <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P312285 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number Intnm-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/07/04 16 58 <br /> Industrial Solvents by EPA Method 8015B modified <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-1(P312285-10)Water Sampled 12/10/03 04 45 Received 12/10/03 09 00 <br /> i <br /> Methanol ND 100 ug/1 1 3L18016 12/18/03 12/18/03 EPA 8015Bm <br /> Surrogate 1 pentanol 101% 62-129 " <br /> VW-2(P312285-11)Water Sampled 12/10/03 02 42 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/1 1 3L18016 12/18/03 12/18/03 EPA 801513m <br /> Surrogate 1-pentanol 115% 62-129 " <br /> VW-3(P312285-12)Water Sampled 12/10/03 03 30 Received 12/10/03 09 00 <br /> Methanol ND 100 UO 1 3L18016 12/18/03 12/18/03 EPA 8015Bm <br /> Surrogate 1 pentanol 112% 62-129 " <br /> VW4(P312285-13)Water Sampled 12/10/03 05 13 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/l 1 3L18016 12/18/03 12/18/03 EPA 801513m <br /> Surrogate I-pentanol 111% 62-129 " <br /> W-5(P312285-14)Water Sampled 12/10/03 02 31 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/1 1 3L18016 12/18/03 12/18/03 EPA 8015Bm <br /> Surrogate I-pentanol 117% 62-129 " <br /> VW-7(P312285-15)Water Sampled 12/10/03 05 52 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/1 1 3L18016 12/18/03 12/18/03 EPA 8015Bm <br /> Surrogate I-pentanol 108% 62-129 " <br /> VW-8(P312285-16)Water Sampled 12/10/03 03 32 Received 12/10/03 09 00 <br /> Methanol ND 100 ugll 1 3L18016 12/18/03 12/18/03 EPA 8015Bm <br /> Surrogate 1-pentanol 117% 62-129 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 4 of 35 <br />