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Sequoia 1455McDowell <br /> Petalu NorthSte4 <br /> Petaluma CA 94954 <br /> (707)792-]865FAX � <br /> 42 <br /> Analytical wwsequ7ialabs om <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 5469,Stockton, CA P412205 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 01/01/05 14 06 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nate <br /> MW-1 (P412205-01)Water Sampled 12/09/04 06 19 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/1 1 4120453 12/21/04 12/22/04 EPA 80158-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 80-110 <br /> MW-3(P412205-02)Water Sampled 12/09/04 06 09 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/l 1 4120453 12/21/04 12/22/04 EPA 9015B-VOA <br /> Surrogate 4-Bromofluorobenzene 85% 80-110 <br /> MW-2(P412205-03)Water Sampled 12/09/04 06 02 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/I 1 4120453 12/21/04 12/22/04 EPA 80158 VOA <br /> Surrogate 4-Bromofluorobenzene 86% 80-110 " <br /> MW-4(P412205-04)Water Sampled 12/09/04 06 30 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C12) 13000 2500 ug/1 50 4120469 12/22/04 12/22/04 EPA 8015B-VOA <br /> Vurrogate 4-Bromofluorobenzene 89% 80-110-5(P412205-05)Water Sampled 12/09/04 05 43 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C12) 130 50 ug/I 1 4120469 12/22/04 12/22/04 EPA 80158-VOA PV <br /> Surrogate 4-Bromofluorobenzene 90% 80-110 <br /> MW-6(P412205-06)Water Sampled 12/09/04 05 21 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C12) 3000 1000 ug/l 20 4120469 12/22/04 12/22/04 EPA 801513-VOA PV <br /> Surrogate 4-Bromofluorobenzene 88% 80-110 " <br /> MW-7(P412205-07)Water Sampled 12/09/04 03 44 Received 12/09/04 09 20 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/1 1 4120469 12/22/04 12/22/04 EPA 80153-VOA <br /> Surrogate 4-Bromofluorobenzene 88% 80-110 <br /> Sequoia Analytical -Petaluma The results in this report apply to the samples analyzed in accordance wrih the chain of <br /> . custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 3 of 21 <br />