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1455 McDowell Blvd,North Ste D <br /> a_ _� Sequoia Petaluma <br /> 92-1855 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P406495 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-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 H111 <br /> Reporhng <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> VW-1 (P406495-16)Water Sampled 06/24/04 21 23 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) 100 50 ug/l I 4GO8004 07/08/04 07/08/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 102% 70-130 " <br /> VW-2(P406495-17)Water Sampled 06/24/04 03 45 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l I 4608004 07/08/04 07/08/04 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 95% 70-130 " <br /> VW-3(P406495-18)Water Sampled 06/24/04 20 39 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 4608004 07/08/04 07/08/04 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 70-130 " <br /> VW4(P406495-19)Water Sampled 06/24/04 02 59 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugfl 1 4608004 07/08/04 07/08/04 EPA 8015E-VOA <br /> Surrogate 4-Bromojluorobenzene 99% 70-130 " <br /> -5(P406495-20)Water Sampled 06/24/04 20 56 Received 06/25/04 09 30 <br /> Gasohne Range Organics(C4-C12) 110 50 ug/l 1 4GO8004 07/08/04 07/08/04 EPA 8015E-VOA <br /> Surrogate 4-Bromojluorobenzene 109% 70-130 " <br /> VW-7(P406495-21)Water Sampled 0624/04 04 09 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l I 4GO8004 07/08/04 07/08/04 EPA 8015B-VOA <br /> Surrogate 4-Brornofluorobenzene 101% 70-130 " <br /> VW-8(P406495-22)Water Sampled 0624104 21 58 Received 06/25/04 09 30 <br /> Gasoline Range Organics(C4-C12) 130 50 ug/l 1 4GO8004 07/08/04 07/08/04 EPA 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 104% 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 weight basis <br /> t� This analytical report must be reproduced in its entirety <br /> Page 5 of 41 <br />