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819 Striker Avenue,Suite 8 <br /> ./ Sacramento,CA 95834 <br /> Sequoia quoia • (916)921-9600 <br /> FAX(9 16)921-0100 <br /> 1 <br /> Analytical FAX <br /> Aw <br /> Sierra-Pacific Groundwater, Inc. Project: Unocal Puregro Broadway <br /> 4911 Windplay Drive,Ste.4 Project Number: N/A Reported: <br /> El Dorado Hills CA,95762 Project Manager: John Rapp 06/15/01 16:23 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1F05001 - EPA 5030B (MeOH) <br /> Blank(1F05001-BLKI) Prepared&Analyzed:06/05/01 <br /> Tetrachloroethene ND 0.10 mg/kg <br /> 1,3-Dichloropropme ND 0.20 " <br /> Dibromochloromethane ND 0.10 " <br /> 1,2-Dibromoethane ND 0.20 " <br /> Chlorobenzene ND 0.10 " <br /> Ethylbenzene ND 0.10 IT <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 /> Isopropylberzene ND 0.20 " <br /> 1,1,2,2-Tetrachloroethane ND 0.20 IT <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 /> tart-Butylbenzene ND 0.20 " <br /> 1,2,4-Trimethylbenzene ND 0.20 " <br /> sec-Butylbenzene ND 0.25 <br /> p-Isopropyltoluene ND 0.20 " <br /> 1,3-Dichlorobenzene ND 0.10 <br /> 1,4-Dichloroberizene ND 0.10 <br /> n-Butylbenzene ND 0.20 " <br /> 1,2-Dichlorobenzene ND 0.10 IT <br /> 1,2-Dibromo-3-chioropropane ND 0.50 " <br /> 1,2,4-Trichlorobenzene ND 0.20 " <br /> Naphthalene ND 0.25 IT <br /> Hexachlorobutadiene ND 0.50 " <br /> 1,2,3-Trichlombenzene ND 0.50 " <br /> Surrogate:Dibromofluoromethane 2.26 1.50 90.4 50-150 <br /> Surrogate:1,2-Dichloroethane-d4 2.34 2.50 93.6 50-150 <br /> Surrogate:Dibromofluoromethane 1.26 1.50 90.4 50-150 <br /> Surrogate: 1,2-Dichloroethane-d4 2.34 2.50 93.6 50-150 <br /> Sequoia Analytical- Sacrarrianto The resuks 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 11 of 19 <br />