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�s �r w � � ® �■ r ® s� aw � r r� �s r w � <br /> HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> UNSATURATED ZONE SOIL GAS <br /> FOOTHILL SANITARY LANDFILL <br /> SG-6 <br /> Sample Type:Air <br /> Sampling Date 11/29/06 3/13/07 8/20/07 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 <br /> 1,2-Dichloropropane <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 1,4-Dioxane NT NT NT NT <38.0 <47.0 <51 <25 <br /> Bromodichloromethane NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> cis-1,3-Dichloropropene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 4-Methyl-2-pentanone NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> Toluene 120 <0.5 <0.5 3.4 <9.5 <12.0 <13 <6.3 <br /> trans-1,3-Dichloropropene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 1,1,2-Trichloroethane <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> Tetrachloroethene (PCE) 9.6 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 2-Hexanone NT NT NT NT <38.0 <47.0 <51 <25 <br /> Dibromochloromethane NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> 1,2-Dibromoethane (EDB) <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> Chlorobenzene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> Ethylbenzene 39 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> m/p Xylene 80 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> o-Xylene 24 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> Styrene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> Bromoform NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> Cumene NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> 1,1,2,2-Tetrachloroethane <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> Propylbenzene NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> 4-Ethyltoluene NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> 1,3,5-Trim ethyl benzene 5.2 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 1,2,4-Trimethylbenzene 13 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 1,3-Dichlorobenzene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 1,4-Dichlorobenzene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> alpha-Chlorotoluene NT NT NT NT <9.5 <12.0 <13 <6.3 <br /> 1,2-Dichlorobenzene <0.5 <0.5 <0.5 <0.5 <9.5 <12.0 <13 <6.3 <br /> 1,2,4-Trichlorobenzene <1.0 <0.5 <0.5 <0.5 <38.0 <47.0 <51 <25 <br /> Hexachlorobutadiene <1.0 <1.0 <1.0 <1.0 <38.0 <47.0 <51 <25 <br /> Benzyl Chloride <1.0 <1.0 <1.0 <1.0 NT NT NT NT <br /> n-butylbenzene <0.5 <0.5 <0.5 <0.5 NT NT NT NT <br /> sec-butyl benzene <0.5 <0.5 <0.5 <0.5 NT NT NT NT <br /> tert-butyl benzene <0.5 <0.5 <0.5 <0.5 NT NT NT NT <br /> NR = Not Required <br /> NT= Not Tested <br /> *=Trace Concentration <br /> {1} Parameter also detected in one or more quality control blanks. <br />