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Blvd, <br /> a— ) Sequoia 1455 McDowell alum ,CA Ste D <br /> + Petaluma,CA 44954 <br /> Analytical (707)792-1865 <br /> l FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P312737 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50265 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/13/04 19 10 <br /> Purgeable Hydrocarbons by EPA 80155 <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ATR-2(P312737-01)Water Sampled 12/24/03 11 45 Received 112/29/03 13 15 <br /> Gasoline Range Organics ND 50 ug/l 1 4010035 01/06/04 01/06/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 65-135 " <br /> ATR4(P312737-02)Water Sampled 12/24/03 11 15 Received 12/29/03 13 15 <br /> Gasoline Range Orgamcs ND 50 ugA l 4010035 01/06/04 01/06/04 EPA <br /> 8015B-VOA <br /> Surrogate 4 Bromofluorobenzene 90% 65-135 " <br /> ATR-5(P312737-03)Water Sampled 12/24/03 13 30 Received 12/29/03 13 15 <br /> Gasoline Range Organics 91 50 ug/l 1 4010035 01/06/04 01/06/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 90% 65-135 11 1 " <br /> ATR-7(P312737-04)Water Sampled 12/24/03 12 55 Received 12/29/03 13 15 <br /> Gasoline Range Organtcs ND 50 ug/l 1 4010035 01/06/04 01/06/04 EPA <br /> 80156-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> ATR-8(P312737-05)Water Sampled 12/24/03 12 15 Received 12/29/03 13 15 <br /> Gasoline Range Organics 140 50 ug/l 1 4010035 01/06/04 01/06/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 95% 65-135 " <br /> ATR-12(P312737-06)Water Sampled 12/24/03 10 40 Received 12/29/03 13 15 <br /> Gasoline Range Organics ND 50 ug/I 1 4010035 01/06/04 01/06/04 EPA <br /> 801513-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must he reproduced in its entirety <br /> Page 3 of 10 <br />