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1455 McDowell Blvd,North Ste D <br /> (D Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> mW Analytical <br /> FAX(707)792-0342 <br /> www sequoialahs corn <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P412423 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/18/05 11 34 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units nhition Batch Prepared Analyzed Method Note <br /> MW-I (P412423-01)Water Sampled 12/20/0412 45 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/I 1 4120548 12/29/04 12/29/04 EPA 80156-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 80-110 " <br /> MW-2(P412423-02)Water Sampled 12/20/04 12 25 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugll 1 4120548 12/29/04 12/29/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 80-110 " <br /> MW-3(P412423-03)Water Sampled 12/20/04 11 55 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 4120548 12/29/04 12/29/04 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 87% 80-110 " <br /> MW-4(P412423-04)Water Sampled 12/20/04 10 14 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/I 1 4120548 12/29/04 12/29/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 86% 80-110 " <br /> AQMW-5(P412423-05REI)Water Sampled 12/21/04 06 15 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-CI2) 330 250 ug/l 5 5010041 01/04/05 01/04/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 90% 80-110 " <br /> MW-6(P412423-06)Water Sampled 12/20/04 11 05 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) 68 50 ug/l 1 4120569 12/30/04 12/30/04 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 86% 80-110 " <br /> MW-7(P412423-07)Water Sampled 12/20/04 12 00 Received 12/23/04 10 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 4120548 12/29/04 12/29/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 82% 80-110 11 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 /> 0 This analytical report must be reproduced in its entirety <br /> Page 3 of 33 <br /> i <br />