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1• <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma, 94954 <br /> (707)79 2-]$65 <br /> FAX 0342 <br /> Analytical wwsequ7,792-com <br /> • www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 434,Lodi,CA P306214 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm 50433 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/16/03 16 01 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B18021B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Now <br /> W-211(P306214-04)Water Sampled 06/11/03 10 20 Received 06/12/03 11 30 <br /> Gasoline Range Organics ND 50 ug/l 1 3060316 06/13/03 06/13/03 EPA 8015B/ <br /> 8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a,a,a-Trifluorotoluene 101 % 65-135 " <br /> Surrogate 4-Bromofluorobenzene 102% 65-135 " <br /> W-3(P3062I4-05)Water Sampled 06/11/03 08 50 Received 06/12/03 11 30 <br /> Gasoline Range Organics ND 50 ug/l 1 3060315 06/13/03 06/13/03 EPA 8015B/ <br /> 8021B <br /> Benzene ND 050 <br /> Toluene ND 0 50 <br /> thylbenzene ND 050 <br /> ylenes(total) ND 050 <br /> Surrogate a a a-Tris luorotoluene 104% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> W-9(P306214-06)Water Sampled 06/11/03 09 15 Received 06/12/03 11 30 <br /> Gasoline Range Organics ND 50 ug/l 1 3060315 06/13/03 06/13/03 EPA 8015B/ <br /> 8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Surrogate a a a-Trif7uorotoluene 103% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> ,SequoiaAnalytical <br /> -Petaluma The results to 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 4 of 10 <br />