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455 McDowell Blvd North Ste <br /> 11) Sequoia Petaluma CA9A95 <br /> 1 4 <br /> (707)792-1362 <br /> Analytical <br /> FAX(707)792-0342 <br /> • www sequoialabs coin <br /> URS Corp-Sacramento Project Arco Site 6100,Tracy,CA P503196 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0287 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 03/25/05 17 38 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-2(P503196-01)Water Sampled 03/15/05 06 14 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-C 12) ND 50 ugfl 1 5030215 03/21/05 03/21/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 80-110 " <br /> MW-8(P503196-02)Water Sampled 03/15/05 05 42 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-C12) 16000 1000 ug/l 20 5030199 03/18/05 03/18/05 EPA 8015E VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 80-110 " <br /> MW-10(P503196-03)Water Sampled 03/15/05 06 44 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-C12) 31000 5000 ug/l 100 5030199 03/18/05 03/18/05 EPA 801513-VOA <br /> Surrogate 4-Bromof7uorobenzene 92% 80-110 <br /> MW-12(P503196-04)Water Sampled 03/15/05 06 57 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-C12) 69000 5000 ug/l 100 5030199 03/18/05 03/18/05 EPA 8015B-VOA <br /> urrogate 4-Bromofluorobenzene 92% 80-110 <br /> W-13(P503196-05)Water Sampled 03/15/05 06 37 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-C12) 530 250 ug/l 5 5030199 03/18/05 03/18!05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 80-110 " <br /> VW-2(P503196-06)Water Sampled 03/15/05 06 00 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-02) 26000 2500 ug/I 50 5030199 03/18/05 03/18/05 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 80-110 <br /> VW-3(P503196-07)Water Sampled 03/15/05 05 52 Received 03/15/05 12 30 <br /> Gasoline Range Organics(C4-C12) 21000 1200 ug/I 25 5030199 03/18/05 03/18/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 90% 80-110 11 1 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 3 of 18 <br />