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(i) <br /> 1455 McDowell Blvd North Ste <br /> Sequoia Petaluma CA 949544 <br /> (707)792-1865 <br /> IW Analytical FAX(707)792-6342 <br /> www sequoialabs com <br /> 0 <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P503073 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50265 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 03/16/05 14 19 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> ATR-8(P503073-08)Water Sampled 03/02/05 14 30 Received 03/03/05 10 35 <br /> Gasoline Range Organics(C4-C12) 92 50 ug/l 1 5030113 03/10/05 03/10/05 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 80-110 " <br /> ATR-9(P503073-09)Water Sampled 03/02/05 13 00 Received 03/03/05 10 35 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5030113 03/10/05 03/10/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 80-110 <br /> ATR-10(P503073-10)Water Sampled 03/02/05 10 40 Received 03/03/05 10 35 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/1 1 5030132 03/11/05 03/11/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 82% 80-110 " <br /> ATR-11 (P503073-11)Water Sampled 03/02/05 11 25 Received 03/03/05 10 35 <br /> Gasoline Range Organics(C4-C12) ND 50 ug11 1 5030113 03/10/05 03/10/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 8.5% 80-110 " <br /> ATR-12(P503073-12)Water Sampled 03/02/05 11 00 Received 03/03/05 10 35 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/I 1 5030113 03/10/05 03/10/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 82% 80-110 11 " " <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 4 of 19 <br />