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819 Stoker Avenue,Suite <br /> Sequoia • Sacramento,CA 95834 <br /> (916)921-96M <br /> FAX )921-Moo <br /> Analytical wwv-sequolalabs,com <br /> Sierra-Pacific Groundwater,Inc. Project: Unocal Puregro Broadway <br /> 4911 Windplay Drive,Ste.4 Project Number: N/A Reported: <br /> EI Dorado Hills CA,95762 Proj=Mmager: John Rapp 06/15/01 16:23 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> AnalyteResult Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-18(S105461-01)Soil Sampled:0513010100:00 Received:05/31/01 16:55 <br /> Dibromochloromethane ND 0.10 mg/kg 100 IF05001 06/05/01 06/05/01 EPA 8260B <br /> 1,2-Dibromoethane - ND 0.20 " <br /> Chlorobenzene ND 0.10 <br /> Ethylbenzene ND 0.10 " <br /> Total Xylenes ND 0.50 " ^ <br /> 1,1,1,2-Tetrachloroethane ND 0.20 <br /> Styrene ND 0.25 <br /> Bromoform ND 0.10 " <br /> Isopropylbenzene ND 0.20 <br /> 1,1,2,2-Tetrachloroethane ND 020 <br /> Bromobenzene ND 0.20 „ <br /> n-Propylbenzene ND 0.10 " <br /> 1,2,3-Trichloropropane ND 0.25 " <br /> 2-Chlorotoluene ND 0.20 " <br /> 1,3,5-Trimethylbenzene ND 0.20 <br /> 4-Chlorotoluene ND 0.10 " <br /> cert-Butylbenzene ND 0.20 " <br /> 1,2,4-Trimethylbenzene ND 020 <br /> sec-Butylbenzene _ ND 0.25 <br /> p-Isopropyltoluene ND 0.20 <br /> 1,3-Dichlorobenzene ND 0.10 <br /> 1,4-Dichlorobenzene ND 0.10 " <br /> n-Butylbenzene ND 0.20 " <br /> 1,2-Dichlorobenzene ND 0.10 " <br /> 1,2-Dibromo-3-chloropropane ND 0.50 <br /> 1,2,4-Trichlorobenzene ND 0.20 <br /> Naphthalene ND 0.25 <br /> Hexachlorobutadiene ND 0.50 " <br /> 1,2,3-Trichlorobenzene ND 0.50 <br /> Surrogate:Dibromofluoromethane 92.8% 50-150 " <br /> Surrogate. 1,2-Dichloroethane-d4 90.4% 50-150 <br /> Surrogate: Toluene-d8 104% 50-150 <br /> Surrogate: 4-Brom0fluoroberizene 146% 50-150 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Page 5 of 19 <br />