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QC Sample Results <br /> Client: Conestoga-Rovers&Assoc. (Emeryville)/SHELL <br /> TestAmerica Job ID: NVL1479 <br /> ProjecVSite: SAP 135703 <br /> Method: SW846 82608 -Volatile Organic Compounds by EPA Method 8260B <br /> Client Sample ID: Method Blank <br /> Lab Sample ID: 11L2262-BLKt <br /> MPrep Type:Total <br /> Matrix: Water <br /> Prep Batch: 111_2262_P <br /> Analysis Batch: U022174 <br /> Blank Blank <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed oil Fac <br /> Benzene <br /> NO 0.500 uglL 12/16/1113:33 12116/1116:13 1.00 <br /> IElhylbenzene ND 0.500 ug/L 12116/1113'.33 12/16/1116:13 1.00 <br /> Toluene <br /> NO 0.500 ug/L 12/16/1113:33 12/16/1116:13 1.00 <br /> NO 0.500 ug/L 12/16/1113:33 12/16/1116'13 1.00 <br /> Xylenes,total <br /> Methyl len-Butyl Ether NO 0.500 ug/L 12/16/11 13.33 12/16/11 16:13 1.00 <br /> Tertiary Butyl Alcohol ND 10.0 ug/L 12/16/11 13:33 12/16/11 16113 1.00 <br /> Diisopropyl Ether NO 0.500 ug/L 12/16/11 13:33 12/16/11 16:13 1.00 <br /> Ethyl tert-Butyl Ether ND 0.500 ug/L 12/16/11 13:33 12/16/11 16:13 1.00 <br /> Ten-Amyl Methyl Ether NO 0.500 ug/L 12/16/11 13:33 12/16/11 16:13 1.00 <br /> Blank Blank <br /> Surrogate <br /> %Recovery Qualifier Limits Prepared Analyzed DY Fac <br /> 1,2-Dichloroethane-d4 102 70-130 11/16/1113:33 _1221-1611116:13 1.00 <br /> Dibromofluoromethane 104 70-130 12/16/1113:33 12/16/1116:13 1.00 <br /> 99 70-130 12/16/1113:33 12/16/1116'13 1.00 <br /> Toluene-dB <br /> 4-Bromo/luorobenzene 98 70-130 12/16/1113'33 12/16/1116:13 1.00 <br /> Lab Sample ID: 11L2262-BS1 Client Sample ID: Lab Control Sample <br /> Prep Type:Total <br /> Matrix:Water Prep Batch:11L2262_P <br /> Analysis Batch: U022174 %Rec. <br /> Spike LCS LCS <br /> Analyte Added Result Qualifier Unit 0 %Rec Limits <br /> 50.0 51.3 u9/L 103 80-121 <br /> Benzene <br /> Elhylbenzene <br /> 50.0 50.5 ug/L 101 80-130 <br /> 50.0 49.5 u9/L 99 80.126 <br /> Toluene <br /> Xylenes,total <br /> 150 146 uglL 98 80-132 <br /> 50.0 53.2 ug/L 106 72-133 <br /> Methyl ten-Butyl Ether 71 54-150 <br /> Tertiary Butyl Alcohol 353 ug/L <br /> .. .500.0.6 52.6 ug/L 105_...62-137. .-.. <br /> Diisopropyl Ether <br /> Ethyl ten-Butyl Ether 50.0 57.4 ug/L 115 63-135 <br /> 50.0 54.7 ug/L 109 63-135 <br /> Ten-Amyl Methyl Ether <br /> LCS LCS <br /> Surrogate %Recovery Qualifier Limits <br /> 1,2-011hloroethane114 111 —70-130 <br /> Dibromofluoromethane 98 70-130 <br /> Toluene-d8 98 70-130 <br /> 4-Bromoiluorobenzene 105 70-130 <br /> Client Sample ID: Matrix Spike <br /> Lab Sample ID: 11L2262-MS1 Prep Type:Total <br /> Matrix:Water Prep Batch: 11L2262_P <br /> Analysis Batch: U022174 %Rec. <br /> Sample Sample Spike Matrix Spike Matrix Spike <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits <br /> 2830 2500 5040 ug/L 96 75-133 <br /> Benzene g7 79-139 <br /> Ethylbenzene 1630 2500 4060 ug/L <br /> 1660 2500 4070 ug/L 96 75-136 <br /> Toluene - -- -- - -- <br /> - "'-- ' �-��---�� - 82 74.141 <br /> -..- ._.. ..........._.- ..-... . .-._..7500 14700 u9 <br /> Xylenes,total 8510 <br /> NO 2500 2430 ug/L 97 66.141 <br /> Methyl ten-Butyl Ether 66 50-183 <br /> Tertiary Butyl Alcohol NO 25000 16600 ug/L <br /> -- - 2500 2500 ug/L 100 54-147 <br /> Diisopropyl Ether NO <br /> TestAmerica Nashville <br /> Page 23 of 48 12/22/2011 <br />