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d,North Ste D <br /> r" ' <br /> Sequoia 1455McDowePl.W me,CA 94954 <br /> (707)742-1865 <br /> Analytical FAX(707)792-0342 <br /> www.sequoislabs,com <br /> URS Corp-Sacramento Project: Arco Site 548,Stockton,CA P310024 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36608 Reported: <br /> Sacramento CA,95833 Project Manager: Vernon P.Elarth 10/13/03 17:17 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015BI8021B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> JAnalyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> EFF Air(P310024-03)Air Sampled:09/29/03 09:00 Received:0913010310:00 <br /> Gasoline Range Organics 12 I0 mg/m'Air 0.2 3090664 09/30/03 09/30/03 EPA rim. <br /> 801513/80211B <br /> SGo ' <br /> Benzene ND 0.10 „ •' " ^ E <br /> Toluene ND 0.10 <br /> Ethylbenzene ND 0.10 " '• " „ „ <br /> Xylenes(total) ND 0.10 <br /> Methyl tert-butyl ether ND 0.40 ^ „ <br /> Surrogate:a,a,a-Trifluorotoluene 98% 65-135 " <br /> Surrogate:4-Bromofluorobenzene 94% 65-135 » <br /> Gasoline Range Organics 3.4 2.8 ppmv 0.2 <br /> Benzene ND 0.032 ^ ~ <br /> Toluene ND 0.026 ^ ^ ^ <br /> Ethylbenzene ND 0.024 ^ ^ ^ <br /> Xylenes(total) ND 0.024 <br /> ethyl tert-butyl ether ND 0.11 ~ ^ <br /> Surrogate:a,a,a-Trifluorotoluene 98% 65-135 » " <br /> Surrogate:4-Bromofluorobenzene 95% 65-135 <br /> eSequoia 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 entirely, <br /> Page 4 of 7 <br />