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1455 WDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> �� <br /> ,!:1) (707)792-1865 <br /> ��► Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P412423 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number Intrim-50293 [reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/18/05 11 34 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result limit Units Dilution Batch Prepared Analyzed Method Note <br /> VW-10(P412423-15RE1)Water Sampled 12/21/04 07 15 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) 34000 5000 ug/l 100 5010041 01/04/05 01104!05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 94% 80-110 " <br /> VW-11 (P412423-16)Water Sampled 12/20/04 13 25 Received 12/23/0410 30 <br /> Gasoline Range Organics(C4-C12) 1000 50 ug/l 1 4120548 12/29/04 12/29/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 97% 80-110 " <br /> VW-12(P412423-17)Water Sampled 12/20/0413 00 Received 12/23/0410 30 <br /> Gasoline Range Organics(C4-C12) 330 50 ug/l l 4120569 12/30/04 12/30/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 90% 80-110 " <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 must be reproduced in its entirety <br /> Page 5 of 33 <br />