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4 <br /> 9501043 Brown & Caldwell <br /> AIR TOXICS LTD. <br /> SAMPLE NAME Method Spike <br /> ID# 9501043-03A <br /> STATE OF CALIFORNIA VV=I <br /> (Modified CARB Method 410A - Low Level Aromatics m Air) <br /> GC/PID <br /> t Det. Limit Det. Limit <br /> Compound (ppmv) (uG/L) % Recovery <br /> Benzene - 0 001 0 003 102 <br /> Toluene' 0 001 0 004 104 <br /> Ethyl Benf`ene 0 001 0 004 101 <br /> Total Xylenes 0 001 0 004 102 <br /> TOTAL PETROLEUM HYDROCARBONS . <br /> GC/FID <br /> (Quantitated as Gasohne) <br /> Det.Limit Det. Limit <br /> Compound (ppmv) (uG/L) % Recovery- <br /> TPH* (C5+Hydrocarbons) 0 010 0042 83 <br /> C2 - C4** Hydrocarbons 0 010 0 018 83 <br /> *TPH referenced to Gasoline (MW 100) <br /> **C2 - C4 Hydrocarbons referenced to Propane (MW=44) <br /> Container Types NA <br /> 40" <br /> Page 5 <br />