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a— —N <br /> 1455 McDowe <br /> Sequoia Petaluma CA 94954 <br /> ll Blvd,North Ste <br /> 44 <br /> 865 <br /> low Analytical ('70707 7792 1 <br /> FAX 792-0334242 <br /> www sequocalabs cum <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P309407 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntnm 50265 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/06/03 16 58 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8015B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Lurut Units Dilution Batch Prepared Analyzed Method Notes <br /> ATR-1 (P309407-01)Water Sampled 09/18/03 14 00 Received 09/19/03 15 25 <br /> Gasoline Range Organics ND 50 ug/l 1 3090610 09/26/03 09/26/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 86% 65-135 " <br /> ATR-2(P309407-02)Water Sampled 09/18/03 14 40 Received 09/19/03 15 25 <br /> Gasoline Range Organics ND 50 ug/I 1 3090610 09/26/03 09/26/03 EPA <br /> 8015B VOA <br /> .Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> ATR-3(P309407-03)Water Sampled 09/18/03 14 20 Received 09/19/03 15 25 <br /> Gasoline Range Organics 70 50 USA 1 3090610 09/26/03 09/26/03 EPA <br /> 801513-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 65-135 11 " " <br /> ATR-4(P309407-04)Water Sampled 09/18/03 13 20 Received 09/19/03 15 25 <br /> Adlik(lasoline Range Organics ND 50 ug/I 1 3090610 09/26/03 09/26/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 86% 65-135 " <br /> ATR-5(P309407-05)Water Sampled 09/18/0311 25 Received 09/19/03 15 25 <br /> Gasoline Range Organics 53 50 ug/1 1 3090610 09/26/03 09/26/03 EPA HC-19 <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> ATR-6(P309407-06)Water Sampled 09/18/03 11 00 Received 09/19/03 15 25 <br /> Gasoline Range Organics ND 50 ug/1 1 3090610 09/26/03 09/26/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluarobenzene 94% 65-135 " <br /> ATR-7(P309407-07)Water Sampled 09/18/03 10 40 Received 09/19/03 15 25 <br /> Gasoline Range Organics ND 50 ug/i 1 3090610 09/26/03 09/26/03 EPA <br /> 801513-VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 65-135 " <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 /> This analytical report trust be reproduced in its entirety <br /> Page 3 of 16 <br />