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AIR TOXICS LTD. <br /> Client Sample ID: Lab Blank <br /> Lab ID#:0505436-04A <br /> MODIFIED EPA METHOD TO-3 GC/PID/FID <br /> Rot. Limit Rpt. Limit Amount Amount <br /> Compound (ppmv) (uG/L) (ppmv) (uG/L) <br /> Benzene 0.0010 0.0032 Not Detected Not Detected <br /> Toluene 0.0010 0.0038 Not Detected Not Detected <br /> Ethyl Benzene 0.0010 0.0043 Not Detected Not Detected <br /> Total Xylenes 0.0010 0.0043 Not Detected Not Detected <br /> TPH (C5+ Hydrocarbons) ref.to Gasoline 0.025 0.10 Not Detected Not Detected <br /> Methyl tent-butyl ether 0.0010 0.0036 Not Detected Not Detected <br /> Container Type: NA-Not Applicable <br /> Method <br /> Surrogates %Recovery Limits <br /> Fluorobenzene(FID) 85 75-150 <br /> Fluorobenzene(PID) 101 75-125 <br /> Page 7 of 9 <br />