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} <br /> 1455 McDowell Blvd,North Ste� Sequoia Petaluma,CA94954 <br /> (707)792-1865 <br /> Analytical FAX <br /> www sequoialabs coni <br /> URS Corp-Sacramento Project Arco Site 2168,Stockton,CA P308085 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36590 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/16/03 11 34 <br /> Total Petroleum Hydrocarbons as Gasohne by EPA 8015B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (P308085-01)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> Gasoline Range Organics 6700 1000 ug/l 20 3080218 08/12/03 08/12/03 EPA HC-19 <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 97% 65-135 <br /> MW-111(P308085-02)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> Gasoline Range Organics ND 50 ug/1 1 3080218 08/12/03 08/12/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 86% 65-135 " <br /> MW-1C(P308085-03)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> Gasoline Range Organics ND 50 ug/i 1 3080218 08/12/03 08/12/03 EPA <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 <br /> MW-2(P308085-04)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> 0asolme Range Organics 430 50 ug/1 1 3080218 08/12/03 08/12/03 EPA IIC-19 <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 90% 65-135 <br /> MW-3(P308085-05)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> Gasoline Range Organics 22000 2500 ugtl 50 3080218 08/12/03 08/12/03 EPA HC-19 <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 95% 65-135 <br /> MW-4(P308085-06)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> Gasoline Range Organics 20000 2500 ug/I 50 3080218 08/12/03 08/12/03 EPA HC-19 <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> MW-5(P308085-07)Water Sampled 08/04/03 00 00 Received 08/06/03 10 45 <br /> Gasoline Range Organics 390 50 ug/l 1 3080218 08/12/03 08/12/03 EPA HC-19 <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 95% 65-135 ' <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 19 <br />