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TestAmerica <br /> THE LEADER IN ENVIRONMENTAL TESTING 17461 Deden Avenue.Suite loo, Irvine.CA 92614(949)261-1022 Fax(949)260-3297 <br /> Conestoga-Rovers&Associates-Emeryville Shell Project ID: 3515 Nary Dr.,Stockton,CA <br /> 5900 Hollis St.,Suite A Sampled: 03/23/11 <br /> Attention: <br /> Aubrey <br /> ey Co Report Number: 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:11 D0429 Extracted:04/05/11 <br /> LCS Dup Analyzed:04/06/2011(11D0429-BSDI) <br /> Benzene 2.43 0.050 mg/kg 2.50 97 65-120 7 20 <br /> Ethylbenzene 2.64 0.050 mg/kg 2.50 105 80-120 2 20 <br /> Toluene 2.89 0.050 mg/kg 2.50 115 80-120 9 20 <br /> m,p-Xylenes 5.46 0.10 mg/kg 5.00 109 70-125 3 20 <br /> o-Xylene 2.62 0.050 mg/kg 2.50 105 70-125 4 20 <br /> Xylenes,Total 8.08 0.10 mg/kg 7.50 108 70-125 3 20 <br /> Di-isopropyl Ether(DIPE) 2.28 0.10 mg/kg 2.50 91 60-140 0.3 20 <br /> Ethyl tert-Butyl Ether(ETBE) 2.40 0.10 mg/kg 2.50 96 60-140 2 20 <br /> Methyl-tert-butyl Ether(MTBE) 2.26 0.10 mg/kg 2.50 90 55-145 2 25 <br /> tert-Amyl Methyl Ether(TAME) 2.49 0.10 mg/kg 2.50 100 60-145 8 25 <br /> tert-Butanol(TBA) 10.9 1.0 mg/kg 12.5 87 65-140 8 20 <br /> Surrogate:4-Bromofluorobemene 2.25 mg/kg 2.50 90 65-140 <br /> Surrogate:Dibromofluoromethane 2.08 <br /> Surrogate:Toluene-d8 252 mg/kg 2.50 55-140 <br /> mg/kg 2.50 /00 1 60-140 <br /> TestAmerica Irvine <br /> Lena Davidkova For Philip Sanelle <br /> Project Manager <br /> The resulls perfam only to the samples tested In the laboratory. This repor(shall no(be reproduced, <br /> except lnful{telthoutwrlttenpermisslonfrom TestAmerics IUC2973 <Page9oj11> <br />