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GD Air Testing Inc. www. gdaincom <br /> CLIENT GD Air Testing, Inc GD Air Testing Lab ID GD05-91214-002 <br /> GD05-91214-003 <br /> Report Date 12/14/05 <br /> Date Analyzed 12/14/05 <br /> Project No Analyzed by LAJ <br /> Method EPATO14 <br /> REPORT OF BLANK SPIKE RESULTS Page 1 of 1 <br /> ISAMPLE DESCRIPTION MATRIX SAMPLE BY SAMPLED DATE/RECEIVED <br /> BS/BSD Air <br /> Spike Control Compounds Spiked Found and Recovery <br /> _ Ppbv BSlppbv BS R% BSD BSD R% - % RPD <br /> VOLATILE ORGANICS BY EPA TQ-14 <br /> Benzene 100 823 82 3 895 89 5 838 <br /> Toluene 100 863 86 3 924 924 683 <br /> Ethylbenzene 100 930 930 101 101 825 <br /> o-Xylene 100 950 950 103 103 808 <br /> Surrogate Recovery Report <br /> 4-D4fiuorobenzene (SSI) 500 497 99 4 86 97 224 <br /> romofl uoro benzene (SS2) 500 522 104 524 105 038 <br /> ' The control limit for BS Recovery % of all spiked compound is 70% - 130% <br /> ' The control limit for relative percentage difference of BS/BSD is 30% <br /> If any control compound is not within the control limit, please see the case narrative for more details <br /> ' The control limit for Surrogate Recovery %of all spiked compound is 70% - 130% Only one is required to pa <br /> Respectfully submitted <br /> GD Air Testing, Inc <br /> ?q�� <br /> George Dai, Ph D <br /> Laboratory Director <br /> Data File gd5973 i1121405 6/12140505 D gd5973 i1121405 6/12140506 D <br /> Report File GDISRIID1QCO2-TO141GD05-91214-002 <br /> �03 N Bowser Rd , Suite 200, Richardson, TX 75081, USA . Tel (972) 480-8908 . Fax (972) 480-8308 <br />