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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> a— ) <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs corn <br /> i <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P406495 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/29/04 17 56 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Lnmt Umts Lhlution Batch Prepared Analyzed Method Note <br /> MS-2B(P406495-08)Water Sampled 06/23/04 07 38 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA 1 4GO7005 07/07/04 07/07/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 75% 70-130 " <br /> MS-3A(P406495-09)Water Sampled 06/23/04 06 15 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l I 4GO7005 07/07/04 07/07/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 74% 70-130 " <br /> VW-11 (P406495-10)Water Sampled 06/23/04 07 24 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/1 I 4G07005 07/07/04 07/07/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 79% 70-130 " <br /> MS-1A(P406495-11)Water Sampled 06/24/0402 19 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA I 4GO7005 07/07/04 07/07/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 77% 70-130 " <br /> S-113(P406495-12)Water Sampled 06/24/04 04 29 Received 06/25/04 09 30 <br /> —Gasoline Range Organics(C4-C12) ND 50 ugA 1 4GO7005 07/07/04 07/07/04 EPA 801513-VOA <br /> Surrogate 4-Bromofluorobenzene 66% 70-130 S02 <br /> MS-3B(P406495-13)Water Sampled 06/24/04 2135 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) 120 50 ug/l 1 4GO8004 07/08/04 07/08/04 EPA 80158-VOA <br /> Surrogate 4-Bromofluorobenzene 102% 70-130 " <br /> MW-6(P406495-14)Water Sampled 06/24/04 02 43 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) 57 50 ug/l 1 4GO8004 07/08/04 07/08/04 EPA 80156-VOA <br /> Surrogate 4-Bromofluorobenzene 99% 70-130 " <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 x eight basis <br /> 0 This analytical report must be reproduced in its entirety <br /> Page 4 of 41 <br />