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I' <br /> Sequoia 1455 McDowell Blvd North Ste D <br /> (D u oia Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical FAX(707)792 0342 <br /> www sequoialabs corn <br /> URS Corp-Sacramento Protect Arco Site 6100,Tracy,CA P404510 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36619 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 05/05/04 18 51 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> B41-37(P404510-01)Soil Sampled 04/19/04 12 24 Received 04/21/04 11 30 <br /> Gasoline Range Organics(C4-C12) ND 1 0 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 94% 65-135 " <br /> 841-49(P404510-02)Soil Sampled 04/19/04 13 00 Received 04/21/04 11 30 <br /> Gasoline Range Organics(C4-C12) ND 1 0 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 87% 65-135 " <br /> B41-57(P404510-03)Soil Sampled 04/19/04 13 47 Received 04/21/04 11 30 <br /> Gasoline Range Organics(C4-C12) ND 1 0 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> 80153-VOA <br /> Surrogate 4-Bromofluorobenzene 100% 65-135 <br /> B41-69(P404510-04)Soil Sampled 04/19/04 14 35 Received 04/21/04 11 30 <br /> line Range Organics(C4-C12) ND 1 0 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> oA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 65-135 <br /> 841-84(P404510-05)Sod Sampled 04/19/04 16 15 Received 04/21/04 11 30 <br /> Gasoline Range Organics(C4-C12) ND 1 0 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> 80158-VOA <br /> Surrogate 4-Bromofluorobenzene 90% 65-135 <br /> B41-97(P404510-06)Soil Sampled 04/20/04 09 53 Received 04/21/04 11 30 <br /> Gasoline Range Organics(C4-C 12) ND 1 0 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 89% 65-135 " <br /> B41-107(P404510-07)Sail Sampted 04/20/04 10 38 Received 04/21/04 11 30 <br /> Gasoline Range Organics(C4-C12) ND 10 mg/kg 2 4040601 04/23/04 04/23/04 EPA <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 94% 65-135 " <br /> oia Analytical -Petaluma The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight bases <br /> This analytical report must be reproduced in its entirety <br /> Page 3 of 17 <br />