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GD Air Testing Inc. www. gdair.com <br /> CLIENT GD Air Testing, Inc GD Air Testing Lab ID GD05-90302-001 <br /> Report Date 03/03/05 <br /> 1 Date Analyzed 03/02/05 <br /> Analyzed by LAJ <br /> GD Air QC Batch QC-030205BTX <br /> ' Protect No Method EPAT014 <br /> REPORT OF METHOD BLANK RESULTS Page 1 of <br /> SAMPLE DESCRIPTION MATRIX SAMPLE BY SAMPLED DATE /RECEIVED <br /> Method Blank Air LAJ 03/02/05 03/02/05 <br /> rCONSTITUENT MW CAS PQL' RESULT NOTE <br /> ppmv ppmv mg/cu M <br /> ' VOLATILE ORGANICS BY EPA TO-14 <br /> Benzene 780 71432 00002 ND ND <br /> Ethylbenzene 106 100411 00002 ND ND <br /> ' Toluene 920 108883 00002 ND ND <br /> m&p-Xylenes 106 1330207 00002 ND ND <br /> o-Xylene 106 95476 00002 ND ND <br /> TPH as Gasoline 86 0 00005 ND ND <br /> Surrogate Recovery Report Spiked Found R% <br /> ppbv ppbv <br /> 1,4-Difluorobenzene (SS1) 1181 540363 5 00 538 108 <br /> Bromofluorobenzene (SS2) 175 460004 500 5 13 103 <br /> 'Comparison with the method blank this sample run with a dilution factor of 1.0 <br /> ' NA <br /> *RESULTS Listed as 'ND' were not detected at or above the listed PQL (Practical Quantitation Limit) <br /> * The control limit for Surrogate Recovery % of all spiked compound is 70%-130% Only one is required to pass <br /> 'Concentrations m ug/cu M reported at 760 mm Hg pressure and 298 deg K <br /> ' "QA/QC reports followed this report include Method blank, Blank spike (BS) and Blank spike duplicate (BSD) <br /> Respectfully submitted <br /> ' GD Air Testing, Inc <br /> George Dai, Ph D <br /> Laboratory Director <br /> Data File gd5973 i1030205 6/03020504 D <br /> ' Report File GD SRIID 1Rpt02-TO14\GD05-90302-001 <br /> • <br /> 903 N Bowser Rd , Suite 200, Richardson, 1X 75081, USA - Tel (972) 480-8908 Fax• (972) 480-8308 <br />