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1455 McDowell Blvd,North Ste D <br /> 954 <br /> Sequoia Petaluma,CA 94865 <br /> � (707)7g2-labs <br /> FAX ) 42AnayticaA wvw.sequoialabs-coni <br /> URS Corp-Sacramento Project: Arco Site 5469, Stockton,CA P305380 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager; Jay Johnson 06/18/03 21:10 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8O15B/8021B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-4(P305380-04)Water Sampled:05/19/03 09:08 Received:05/19/03 11:45 <br /> Gasoline Range Organics 16000 2500 ugll 50 3050703 05/28/03 05/28/03 EPA <br /> 8015B18021B <br /> Benzene 2700 25 " <br /> Toluene ND 25 " <br /> Ethylbenzene ND 25 " <br /> Xylenes(total) ND 25 <br /> Surrogate:a,a,a-Trifluorotoluene III% 65-135 " <br /> Surrogate:4-Bromofluorobenzene 97% 65-135 " <br /> MW-5(P305380-05)Water Sampled:05/19/03 08:28 Received:05/19/03 11:45 <br /> Gasoline Range Organics 1300 250 ug/I 5 3050703 05/28/03 05/28/03 EPA <br /> 801513I802113 <br /> Benzene ND 2.5 " <br /> Toluene ND 2.5 <br /> �yylbenzene ND 2,5 <br /> lenes(total) ND 2.5 " <br /> Surrogate:a,a,a-Trifluorotoluene 111% 65-135 " <br /> Surrogate:4-Bromofluorobenzene 96% 65-135 " <br /> MW-6(P305380-06)Water Sampled:05/19/03 09:24 Received: 05/19/03 11:45 <br /> Gasoline Range Organics 29000 5000 ugJl 100 3050703 05/28/03 05/28/03 EPA <br /> 8015BI8021B <br /> Benzene ND 50 <br /> Toluene ND 50 " <br /> Ethylbenzene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Surrogate:a,a,a-Trifluorotoluene 111 % 65-135 " <br /> Surrogate:4-Bromofluorobenzene 95% 65-135 " <br /> equoia 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 8 of 36 <br />