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Sequoia 1455 McDowell Blvd North Ste <br /> Petaluma,CA 949544 <br /> Analytical (707)792-1865 <br /> FAX(707)792.0342 <br /> www sequoialabs com <br /> i <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P409434 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36593 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/08/04 09 40 <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-8(P409434-08)Water Sampled 09/23/04 04 20 Received 09/23/04 13 15 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 4090758 09/30/04 09/30/04 EPA 80158-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 804-110 " <br /> VW-1B(P409434-09)Water Sampled 09/23/04 09 20 Received 09/23/04 13 15 <br /> 'Gasoline Range Organics(C4-C12) 510 50 ug/l 1 4090758 09/30/04 09/30/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 804-110 " <br /> VW-2B(P409434-10)Water Sampled 09/23/0410 07 Received 09/23/0413 15 <br /> Gasoline Range Organics(C4-02) 220 50 ugll 1 4090758 09/30/04 09/30/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 804-110 " <br /> ✓VW-3B(P409434-11)Water Sampled 09/23/04 10 55 Received 09/23/04 13 15 <br /> Gasoline Range Organics(C4-C12) 94 50 ug/1 1 4090758 09/30/04 09/30/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 96% 804-110 " <br /> • <br /> I <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 6 of 21 <br />