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TestAmerica <br /> 1H LEADER 1N ENVIRONMENTAL TESTING 17461 Derien Avenue.Suite 100, Irvine,CA 92614(949)261-IO2_�Fve:(949)260-3297 <br /> Conestoga-Rovers&Associates-Emeryville Shell Project ID: 3515 Navy Dr,Stockton,CA <br /> 5900 Hollis St.,Suite A Sampled: 03/23/11 <br /> Emeryville,CA 94608 ReportNumber: IUC2973 Received: 03/29/11 <br /> Attention: Aubrey Cool <br /> METHOD BLANK/QC DATA <br /> VOLATILE ORGANICS by GC/MS(EPA 5030B/8260B) <br /> Reporting Spike Source %REC RPD Data <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Qualifiers <br /> Batch:11D0429 Extracted:04/05/11 <br /> Blank Analyzed:04/05/2011(11 D0429-BLKI) <br /> Benzene ND 0.050 mg/kg <br /> Ethylbenzene ND 0.050 mg/kg <br /> Toluene ND 0.050 mg/kg <br /> m,p;Xylenes ND 0.10 mg/kg <br /> o-Xylene ND 0.050 mg/kg <br /> Xylenes,Total ND 0.10 mg/kg <br /> Di-isopropyl Ether(DIPE) ND 0.10 mg/kg <br /> Ethyl tert-Butyl Ether(ETBE) ND 0.10 mg/kg <br /> Methyl-tert-butyl Ether(MTBE) ND 0.10 mg/kg <br /> tert-Amyl Methyl Ether(TAME) ND 0.10 mg/kg <br /> tert-Butanol(TBA) ND 1.0 mg/kg <br /> Surrogate:4-Bromof/uorobemene 2.40 mg/kg 2.50 96 65-140 <br /> Surrogate:Dibromofluoromerhane 2.37 mg/kg 2.50 95 55-140 <br /> Surrogate:Toluene-d8 2.41 mg/kg 2.50 96 60-140 <br /> LCS Analyzed:04/06/2011(11D0429-BSI) M[NR <br /> Benzene 2.26 0.050 mg/kg 2.50 91 65-120 <br /> Ethylbenzene 2.68 0.050 mg/kg 2.50 107 80-120 <br /> Toluene 2.64 0.050 mg/kg 2.50 106 80-120 <br /> m,p-Xylenes 5.62 0.10 mg/kg 5.00 112 70-125 <br /> o-Xylene 2.72 0.050 mg/kg 2.50 109 70-125 <br /> Xylenes,Total 8.34 0.10 mg/kg 7.50 111 70-125 <br /> Di-isopropyl Ether(DIPE) 2.28 0.10 mg/kg 2.50 91 60-140 <br /> Ethyl tert-Butyl Ether.(ETBE) 2.36 0.10 mg/kg 2.50 95 60-140 <br /> Methyl-tert-butyl Ether(MTBE) 2.21 0.10 mg/kg 2.50 89 55-145 <br /> tert-Amyl Methyl Ether(TAME) 2.69 0.10 mg/kg 2.50 108 60-145 <br /> tert-Butanol(TBA) 11.8 1.0 mg/kg 12.5 94 65-140 <br /> Surrogate:4-Bromofluorobemene 2.24 mg/kg 2.50 90 65-140 <br /> Surrogate:Dibromofluoromethane 2.06 mg/kg 2.50 82 55.140 <br /> Surrogate:Toluene-0 2.30 mg/kg 2.50 92 60-140 <br /> TestAmerica Irvine <br /> Lena Davidkova For Philip Sanelle <br /> Project Manager <br /> The results perlaln only to the samples reseed In the laborotary. This report shall not be reproduced, /OC2973 <pnge 8 of 11> <br /> except In full,without written permission from TWAmerlm <br />