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TestAmerica <br /> THE LEADER IN ENVIRONMENTAL TESTING 17461 Derian Avenae.6uite 100, Irvina,CA 92614(949)261-1022 Fax:(949)260-3297 <br /> Conestoga-Rovers&Associates-Emeryville Shell Project ID: 3515 Navy Dr.,Stockton,CA <br /> 5900 Hollis St.,Suite A Sampled: 04/08/11 <br /> Emeryville,CA 94608 Repon Number. IUD1020 Received: 04/12/11 <br /> Attention: Aubrey Cool <br /> METHOD BLANK/QC DATA <br /> VOLATILE ORGANICS by GC/MS(EPA 503013/826011) <br /> Reporting Spike Source %REC RPD Data <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Qualifiers <br /> Batch: 1ID2098 Extracted:04/17111 <br /> LCS Dup Analyzed:04/18/2011(11D2098-BSDI) <br /> Benzene 2.75 0.050 mg/kg 2.50 110 65-120 2 20 <br /> Ethylbenzene 2.82 0.050 mg/kg 2.50 113 80-120 0.2 20 <br /> Toluene 2.78 0.050 mg/kg 2.50 111 80-120 2 20 <br /> m,p-Xylenes 5.49 0.10 mg/kg 5.00 110 70-125 0.3 20 <br /> o-Xylene 2.70 0.050 mg/kg 2.50 108 70-125 1 20 <br /> Xylenes,Total 8.19 0.10 mg/kg 7.50 109 70-125 0.1 20 <br /> Di-isopropyl Ether(DIPE) 2.77 0.10 mg/kg 2.50 111 60-140 5 20 <br /> Ethyl tert-Butyl Ether(ETBE) 2.54 0.10 mg/kg 2.50 102 60-140 3 20 <br /> Methyl-tert-butyl Ether(MTBE) 2.43 0.10 mg/kg 2.50 97 55-145 6 25 <br /> tert-Amyl Methyl Ether(TAME) 2.51 0.10 mgtkg 2.50 100 60-145 3 -25 <br /> tert-Butanol(TBA) 11.5 1.0 mg/kg 12.5 92 65-140 3 20 <br /> Surrogate:4-Bromofluorobenzene 2.41 mg/kg 1.50 97 65-140 <br /> Surrogate:Dibromofluoromethane 1.17 mg/kg 1.50 87 55-140 <br /> Surrogate:Toluene-d8 2.64 mg/kg 2.50 105 60-140 <br /> Matrix Spike Analyzed:04/18/2011 (11D2098-MSI) Source:IUD1020-05 <br /> Benzene 2.91 0.051 mg/kg 2.53 0.197 107 55-140 <br /> Ethylbenzene 12.6 0.051 mg/kg 2.53 5.58 277 50-150 Ml <br /> Toluene 2.75 0.051 mg/kg 2.53 0.0374 108 55-140 <br /> m,pXylenes 43.9 0.10 mg/kg 5.05 20.2 469 60-145 Ml <br /> o-Xylene 3.94 0.051 mg/kg 2.53 0.647 130 55-145 <br /> Xylenes,Total 47.8 0.10 mg/kg 7.58 20.8 356 55-145 MI <br /> Di-isopropyl Ether(DIPE) 2.61 0.10 mg/kg 2.53 NO 104 60-150 <br /> Ethyl tert-Butyl Ether(ETBE) 2.34 0.10 mg/kg 2.53 NO 93 60-150 <br /> Methyl-tert-butyl Ether(MTBE) 2.30 0.10 mg/kg 2.53 NO 91 55-155 <br /> tert-Amyl Methyl Ether(TAME) 2.23 0.10 mg/kg 2.53 NO 88 60-150 <br /> tert-Butanol(TBA) 11.1 1.0 mg/kg 12.6 NO 88 60-155 <br /> Surrogate:4-BromoJluorobemene 2.36 mg/kg 2.53 93 65-140 <br /> Surrogate:Dibromofluoromethane 1.93 mg/kg 2.53 76 55-140 <br /> Surrogate:Toluene-d8 2.19 mg/kg 2.53 91 60-140 <br /> TestAmerica Irvine <br /> Philip Sanelle <br /> Project Manager <br /> The results pertain only to the samples tested in the laboratory. This report shall not be reproduced, IUD1020 <page l o of 15> <br /> "cap,in full,without wrham permission from TestAmerica. <br />