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cbCurtis &Tompkins.Ltd. <br /> Batch QC Report <br /> Curtis & Tompkins Laboratories Aaly&-cal Report <br /> Lab #: 211070 Location: Valero <br /> Client: Technical Studies, Inc. Prep: EPA 5030B <br /> Project#: STANDARD Analysis: EPA 80213 <br /> Matrix: Soil Diln Fac: 1.000 <br /> Units: ug/Kg Batch#: 149692 <br /> Basis: as received , <br /> Type: BS Analyzed: 04/07/09 <br /> Lab ID: QC490710 <br /> Analyte Spiked Result %REC Limits <br /> Benzene 50.00 49:'61 99 76-1.20 <br /> Toluene 50.00 52''57 105 73-124 <br /> Ethylbenzene 50.00 �° 56:19 112 76-128 <br /> m,p-Xylenes 50.00 54. 69 109 75-129 <br /> o-X leve 50.,00, 55.56 111 74-129 <br /> Surrogate %REC Limits <br /> Trifluorotoluene (PID) 113 40-143 <br /> Bromofluorobenzene (PID) 109 45-139 <br /> Type: BSD Analyzed: 04/08/09 <br /> Lab ID: QC490711 <br /> �i <br /> Analyte Spiked Result %REC. Limits RPD Lim <br /> Benzene 150.0 . 161:.5 108 76-120 8 20 <br /> Toluene 150.0 166:5 111 73-124 5 23 <br /> Ethylbenzene 150.0 164.1 109 76-128 3 24 <br /> m,p-Xylenes 150.0 158.9 106 75-129 3 24 <br /> o-Xylene 150.0 168.,1 112 74-129 1 24 <br /> Surrogate %REC Limits <br /> Trifluorotoluene (PID) 118 40-143 <br />€ Bromofluorobenzene (PID) 117 45-139 <br /> i <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 13.2 <br />