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cbCurtis &Tompkins.Ltd <br /> Batch QC Report I <br /> Volatile Organics <br /> La 218617 Location: Franks One Stop <br /> Client: URS Corporation Prep: EPA 5030B <br /> Pro'ect#: 17325996 Anal sis: EPA 8260B <br /> Matrix: Water Batc 160667 <br /> Units: ug/L Analyzed: 03/05/10 <br /> Diln Fac: 1.000 <br /> Type: BS Lab ID: QC535024 <br /> Analyte Spiked Result %REC Limits <br /> tert-butylA co o TBA 100 . 0 89. 74 90 36-156 <br /> Isopropyl Ether (DIPE) 20.00 17.27 86 54-139 <br /> Ethyl tert-Butyl Ether (ETBE) 20.00 18.05 90 64-133 <br /> Methyl tert-Amyl Ether (TAME) 20.00 18.48 92 73-124 <br /> 1,1-Dichloroethene 20.00 18.74 94 71-136 <br /> Benzene 20.00 20.94 105 81-122 <br /> Trichloroethene 20.00 22.42 112 80-124 <br /> Toluene 20.00 20.58 103 82-122 <br /> Chlorobenzene 20. 00 19. 91 100 84-118 <br /> Surrogate %REC Limits <br /> Dibromofluoromethane 99 81-124 <br /> 1,2-Dichloroethane-d4 122 73-140 <br /> Toluene-d8 103 88-113 <br /> Bromofluorobenzene 100 80-127 <br /> Type: BSD Lab ID: QC535025 1 <br /> Analyte Spiked Result %REC Limits RPD Lim <br /> tert-Buty A co o TBA 100.0 93.35 93 36-156 4 23 <br /> Isopropyl Ether (DIPE) 20.00 17.00 85 54-139 2 11 <br /> Ethyl tert-Butyl Ether (ETBE) 20.00 18.13 91 64-133 0 11 <br /> Methyl tert-Amyl Ether (TAME) 20.00 18.19 91 73-124 2 11 <br /> 1,1-Dichloroethene 20.00 18.31 92 71-136 2 15 <br /> Benzene 20.00 20.26 101 81-122 3 12 <br /> Trichloroethene 20.00 21.42 107 80-124 5 13 <br /> Toluene 20.00 19.93 100 82-122 3 12 <br /> Chlorobenzene 20.00 19.23 96 84-118 3 11 <br /> Surrogate %REC Limits <br /> Dibromofluoromethane 100 81-124 <br /> 1,2-Dichloroethane-d4 118 73-140 <br /> Toluene-d8 103 88-113 <br /> Bromofluorobenzene 100 80-127 <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 43.0 ' <br /> 112 of 116 ' <br />