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1455 McDowell Blvd,North Ste D <br /> (D— Sequoia Petaluma,CA 94954 <br /> Analytical (77)792-1845 <br /> FAX(707)792A342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P504013 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0164 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elanh 04/14/05 16 07 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Umis Dilution Batch Prepared Analyzed Method Now <br /> MW-1 (P504013-01)Water Sampled 03/30/05 14 44 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) 6200 250 ugA 5 5040101 04/I2/05 04/12/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 83% 80-110 " <br /> MW-2(P504013-02)Water Sampled 03/30/05 18 21 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040101 04/12/05 04/12/05 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 87% 80-110 " <br /> MW-3(P504013-03)Water Sampled 03/30/05 12 52 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) ND 50 ug(l 1 5040054 04/06/05 04/05/05 EPA 80I5B-VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 80-110 <br /> MW4(P504013-04)Water Sampled 03/30/05 16 55 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l I 5040101 04/12/05 04/12/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 85% 80-110 " <br /> �IW-5(P504013-05)Water Sampled 03/30/05 11 53 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040101 04/12/05 04/12/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 83% 80-110 " <br /> MW-6(P504013-06)Water Sampled 03/30/05 10 00 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA 1 5040101 04/12/05 04/12/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluoroberzene 87% 80-110 " <br /> MW-7(P504013-07)Water Sampled 03/30/05 10 52 Received 03/31/05 12 45 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040101 04/12/05 04/12/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 91 % 80-110 " <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 20 <br />