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Sequoia 1455 McDowell 131vd,Horth Ste D <br /> Petaluma,CA 94954 <br /> a— ) (707)792-1862 <br /> Analytical <br /> FAX(707)792-0342 <br /> www sequotalabs corn <br /> • <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P312285 <br /> 2870 Gateway Oaks Drive 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 Analyhcal-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-10(P312285-17)Water Sampled 12/10/03 03 09 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/I 1 31,18016 12/18/03 12/19/03 EPA 801513rn <br /> Surrogate 1 pentanol 109% 62-129 " <br /> VW-11(P312285-18)Water Sampled 12/10/03 04 09 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/l I 3L18016 12/18/03 12/19/03 EPA 8015Bm <br /> Surrogate 1-pentanol 996% 62-129 <br /> VW-12(P312285-19)Water Sampled 12/10/03 05 30 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/l I 3LI8016 12/18/03 12/19/03 EPA 8015Bm <br /> Surrogate I-pentanol 102% 62-129 <br /> MS-1A(P312285-20)Water Sampled 12/10/03 07 18 Received 12/10/03 09 00 <br /> Methanol ND 100 ugll 1 3L18016 12/18/03 12/19/03 EPA 801513m <br /> Surrogate 1 pentanol 110% 61-129 " " <br /> S-1 (P312285-21)Water Sampled 12/10/03 07 33 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/l l 3L22003 12/22/03 12/22/03 EPA 8015nm <br /> Surrogate 1 pentanol 111 % 62-129 " <br /> MS-2A(P312285-22)Water Sampled 12/10/030644 Received 12/10/03 09 00 <br /> Methanol ND 100 ug/I 1 3L22003 12/22/03 12/22/03 EPA 801513m <br /> Surrogate I-pentanol 113% 61-129 " <br /> MS-213(P312285-23)Water Sampled 12/10/03 06 55 Received 12/10/03 09 00 <br /> Methanol ND 100 u0 1 31,22003 12/22/03 12/22/03 EPA 801513m <br /> Surrogate 1 pentanol 92 4% 62-129 " " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> ojcustody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 5 of35 <br />