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QUALITY CONTROL REPORT <br /> METHOD BLANK <br /> Method Mod EPA 602 (BTEX) Date Analyzed 09/09/93 <br /> Units ug/L (ppb) <br /> Reporting <br /> Analyte Limit Concentration <br /> Benzene 0 50 BRL <br /> Toluene 0 50 BRL <br /> Ethylbenzene 0 50 BRL <br /> 1,2-Xylene 0 50 BRL <br /> 1,3-Xylene 0 50 BRL <br /> 1,4-Xylene 0.50 BRL <br /> Surroizate % Recovery Acceptance Limits <br /> a,a,a-Trifluorotoluene 91 63 - 134 <br /> 1 <br /> MBT Environmental ' ` - <br /> Laboratories <br /> (CN8051) <br />