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TestAmerica <br /> THE LEADER IN ENVIRONMENTAL TESTING 17461 Derlm Avenue.Suite 100, Irvine,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: 03/30/11-03/31/11 <br /> Emeryville,CA 94608 ReportNumber: IUD0117 Received: 04/02/11 <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: 11DO589 Extracted:04/06/11 <br /> LCS Analyzed:04/06/2011(1ID0589-BSI) NfNR1 <br /> Benzene 2.38 0.050 mg/kg 2.50 95 65-120 <br /> Ethylbenzene 2.64 0.050 mg/kg 2.50 106 80-120 <br /> Toluene 2.64 0.050 mg/kg 2.50 106 80-120 <br /> m,p-Xylenes 5.20 0.10 mg/kg 5.00 104 70-125 <br /> o-Xylene 2.49 0.050 mg/kg 2.50 100 70-125 <br /> Xylenes,Total 7.70 0.10 mg/kg 7.50 103 70-125 <br /> Di-isopropyl Ether(DIPE) 2.27 0.10 mg/kg 2.50 91 60-140 <br /> Ethyl tert-Butyl Ether(ETBE) 2.38 0.10 mg(kg 2.50 95 60-140 <br /> Methyl-tert-butyl Ether(MTBE) 2.23 0.10 mg/kg 2.50 89 55-145 <br /> tert-Amyl Methyl Ether(TAME) 2.45 0.10 mg/kg 2.50 98 60-145 <br /> tert-Butanol(TBA) 12.0 1.0 mg/kg 12.5 96 65-140 <br /> Surrogate:4-Bromofluorobeazene 1.95 mg/kg 2.50 78 65-140 <br /> Surrogate:Dibromofluoromethane 1.87 mg/kg 1.50 75 55-140 <br /> Surrogate:Toluene-d8 1.13 mg/kg 1.50 85 60-140 <br /> LCS Dup Analyzed:04/06/2011(11D0589-BSD1) <br /> Benzene 2.64 0.050 mg/kg 2.50 105 65-120 10 20 <br /> Ethylbenzene 2.68 0.050 mg/kg 2.50 107 80-120 1 20 <br /> Toluene 2.67 0.050 mg/kg 2.50 107 80-120 1 20 <br /> m,p-Xylenes 5.61 0.10 mg/kg 5.00 112 70-125 7 20 <br /> o-Xylene 2.72 0.050 mg/kg 2.50 109 70-125 9 20 <br /> Xylenes,Total 8.33 0.10 mglkg 7.50 111 70-125 8 20 <br /> Di-isopropyl Ether(DIPE) 2.44 0.10 mg/kg 2.50 98 60-140 8 20 <br /> Ethyl tert-Butyl Ether(ETBE) 2.50 0.10 mgtkg 2.50 100 60-140 5 20 <br /> Methyl-tert-butyl Ether(MTBE) 2.33 0.10 mg/kg 2.50 93 55-145 5 25 <br /> tert-Amyl Methyl Ether(TAME) 2,60 0.10 mg/kg 2.50 104 60-145 6 25 <br /> tert-Butanol(TBA) 12.5 1.0 mg/kg 12.5 100 65-140 5 20 <br /> Surrogate:4-Bromofluorobemene 2.06 mg/kg 1.50 82 65-140 <br /> Surrogate:Dibromofluoromethane 1.95 mg/kg 2.50 78 55-140 <br /> Surrogate:Toluene-d8 1.11 mg/kg 2.50 85 60-140 <br /> TestAmerica Irvine <br /> Pat Abe For Philip Sanelle <br /> Project Manager <br /> The results pertain only to the samples tested in the laboratory. This report shall not be reproduced, <br /> except m full,without written permission from TestAmerica. 1 UD0117 <Page 11 of 23> <br />