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M M M M M ® M M M M M ® M M M M M M M <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -2 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11/04 5/6/04 7/22/04 11/15/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 <br />4-Methyl-2-pentanone NT NT NT NT NT NT NT NT NT NT <br />Toluene 10 36 <0.5 2 322 17 43 5.7 110 62 <br />ne <br />Tetrachloroethene (PCE) <br /><0.5 <br /><0.5 <br />1.1 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />5.8 <br /><0.5 <br />2-Hexanone <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Dibromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,2-Dibromoethane (EDB) <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Chlorobenzene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><n 5 <br />Ethylbenzene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 29 <0.5 <br />m/D Xvlene 1 n <n s <n r, <n ti 4 r of Q -r, A -n C CC C <br />Bromoform <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Cumene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,1,2,2 -Tetrachloroethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Propylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT NT NT NT NT NT NT NT NT NT <br />1,/-,4-1 rimetnyibenzene <br /><0.5 <br /><0.5 <br />1.9 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />7.8 <br /><0.6--- <br />1,3-Dichlorobenzene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />1,4 -Dichlorobenzene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />alpha-Chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />ne <br />i ,c,4- i ncnioroDenzene <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />Hexachlorobutadiene <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />1.7 <br /><10 <br />Benzyl Chloride <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />n-butylbenzene <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />sec-butylbenzene <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />tert-butyl benzene <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NR = Not Required <br />NT = Not Tested <br />* = Trace Concentration <br />{1} Parameter also detected in one or more quality control blanks. <br />