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TestAmerica <br /> THE LEADER IN ENVIRONMENTAL TESTING 17461 Derim Avenue.Suite 100, 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: 03/29/11-03/30/11 <br /> Emeryville,CA 94608 Report Number: IUC3240 Received: 03/31/11 <br /> Attention: Aubrey Cool <br /> METHOD BLANK/QC DATA <br /> VOLATILE ORGANICS by GUMS(EPA 5030B/8260B) <br /> Reporting Spike Source %REC RPD Data <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Qualifiers <br /> Batch:I1D0443 Extracted:04/05/11 <br /> LCS Analyzed:04/05/2011(11D0443-BSI) <br /> Benzene 0.0487 0.0010 mg/kg 0.0500 97 65-120 <br /> Ethylbenzene 0.0487 0.0010 mg/kg 0.0500 97 70-125 <br /> Toluene 0,0498 0.0010 mg/kg 0.0500 100 70-125 <br /> m,p-Xylenes 0.0931 0.0020 mg/kg 0.100 93 70-125 <br /> o-Xylene 0.0488 0.0010 mg/kg 0.0500 98 70-125 <br /> Xylenes,Total 0.142. 0.0020 mg/kg 0.150 95 70-125 <br /> Di-isopropyl Ether(DIPS) 0.0525 0.0020 mg/kg 0.0500 105 60-140 <br /> Ethyl Cert-Butyl Ether(ETBE) 0.0669 0.0020 mg/kg 0.0500 134 60-140 <br /> Methyl-tert-butyl Ether(MTBE) 0.0581 0.0020 mg/kg 0.0500 116 60-140 <br /> tert-Amyl Methyl Ether(TAME) 0.0755 0.0020 mg/kg 0.0500 151 60-145 L <br /> Cert-Butanol(TBA) 0.223 0.020 mg/kg 0.250 89 70-135 <br /> Surrogate:4-Bromofluorobenzene 0.0479 mg/kg 0.0500 96 80-120 <br /> Surrogate:Dibromofluoromethane 0.0538 mg/kg 0.0500 108 80-125 <br /> Surrogate:Toluene-d8 0.0517 mg/kg 0.0500 103 80-120 <br /> Matrix Spike Analyzed:04/0512011(1100443-MSI) Source:IUD0117-03 <br /> Benzene 0.0528 0.00099 mg/kg 0.0494 ND 107 65-130 <br /> Ethylbenzene 0.0527 0.00099 mg/kg 0.0494 ND 107 70-135 <br /> Toluene 0.0530 0.00099 mg/kg 0.0494 ND 107 70-130 <br /> m,p­Xylenes 0.101 0.0020 mg/kg 0.0988 ND 103 70-130 <br /> o-Xylene 0.0518 0.00099 mg/kg 0.0494 ND 105 65-130 <br /> Xylenes,Total 0.153 0.0020 mg/kg 0.148 ND 103 70-125 <br /> Di-isopropyl Ether(DIPE) 0.0558 0.0020 mg/kg 0.0494 ND 113 60-150 <br /> Ethyl tert-Butyl Ether(ETBE) 0.0696 0.0020 mg/kg 0.0494 ND 141 60-145 <br /> Methyl-Cert-butyl Ether(MTBE) 0.0609 0.0020 mg/kg 0.0494 0.00152 120 55-155 <br /> tert-Amyl Methyl Ether(TAME) 0.0759 0.0020 mg/kg 0.0494 ND 154 60-150 M7 <br /> tert-Butanol(TBA) 0.568 0.020 mg/kg 0.247 0.232 136 65-145 <br /> Surrogate:4-Bromofluorobemene 0.0471 mg/kg 0.0494 95 80-120 <br /> Surrogate:Dibromofluoromethane 0.0518 mg/kg 0.0494 105 80-125 <br /> Surrogate:Toluene-d8 0.0510 mg/kg 0.0494 103 80-120 <br /> TestAmerica Irvine <br /> Lena Davidkova For Philip Sanelle <br /> Project Manager <br /> The results pertain only to the samples tested in the laboratory. This report shall not be reproduced, JUC3240 < <br /> except in full,without wriaen permission from TaOmerim Page 18 of 23> <br />