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HISTORICAL SUMMARY OF ANALYTICAL RESULT: <br /> UNSATURATED ZONE AIR <br /> NORTH COUNTY SANITARY LANDFILL <br /> SG-5 <br /> Sample Type:Air <br /> Sampling Date 9/29/03 2/11/04 5/7/04 7/22/04 11/9/04 2/10/05 9/30/05 6/26/06 <br /> Monitoring and Field Parameters <br /> Methane Concentration percent 0 25.9 <br /> Volatile Organic Compounds PPB(v/vl <br /> Benzene <0.5 1.9 <0.5 <0.5 <0.5 <0.5 <0.5 N <br /> Benzyl C londe <1.0 <1.0 <1.0 <1.0 <1.0 <1. <1.0 N <br /> Bromomethane <0.5 <0.5 <0.5 < .5 <0.5 <0.5 <0.5 <br /> Carbon Tetrachloride <o.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <br /> Chlorobenzene e0, <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ND <br /> Chloroethane <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 8.5 <br /> Ch oro rm <0.5 <0.5 <0.5 <0.5 1.7 <0.5 <0.5 ND <br /> Chloromethane <0.5 <0.5 < .5 <0.5 <0.5 <0.5 13 <br /> 1,2-Dibromoethane <0.5 <0.5 <0.5 <0.5 <0. <0.5 <0.5 ND <br /> 1,2-Dichlorobenzene <0.5 2.1 <0.5 0.9 <0.5 <0.5 <0.5 ND <br /> 1,3- orobenzene <0.5 <0.5 <0.5 <0, <0. <0.5 <0.5 <br /> NO--- <br /> 1,4-Dichlorobenzene <0.5 19 <0.5 <0.5 <0.5 <0.5 -<-O-.5-----ND- <br /> Dichlorodifluoromethane <br /> 0.5Dich oro i uoromet ane 4.0 37 158 81 <0.5 140 167 240 <br /> 11- i oroethane <0,5 <0.5 <0.5 <0.5 <0. <0.5 <0.5 <br /> 2- i oroethane <0.5 < <0.5 <0. <0.5 <1. <1.0 ND <br /> 1, - ichoro-1,1,2, - etra uoroethane <0.5 6.3 16 6.1 4.7 17 40 ND <br /> -Ds oro§ !ene <0.5 <0.5 <0.5 <0. <0.5 <0.5 ND <br /> cis-12- is oroet ene <0.5 2.1 < .5 < .5 <0.5 < .5 <0.5 ND <br /> 1, -Dic loropropane <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ND <br /> cis-1, ichloropropene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ND <br /> trans-1,3- ichioropropene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NO <br /> '-Tbenzene <0.5 3.9 <0.5 < 5 < 5 <0.5 <0.5 ND <br /> exa oro utadiene <1.0 <1.0 <1.0 <1.0 <br /> Methylene Chlori a <1.0 <1.0 <1.0 <11.0 <1.0 <1.0 <1.0 ND <br /> Styrene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ND <br /> 1,1,2-Tnchloro-1,2,2-Tnfluoroethane <0.5 1.4 1.6 3.4 < .5 2.4 <0.5 D <br /> 1,1, -Tetra oroethane <0.5 <0.5 <0.5 27 <0.5 <0.5 <0.5 ND <br /> etra loroethene(P .8 29 22 177 114 20 96 3 <br /> o uene <0.5 9.5 13 1.6 2.0 <0.5 <0.5 ND <br /> 1,2,4-Trichoro enzene <1.0 <1. <1.0 2.9 <1. <1. <1.0 ND <br /> 1,1,2-Trichloroethane <0.5 <0.5 1.0 <0.5 <0.5 <0, <br /> - richloroe ane < .5 <03 <0.5 1.1 <0.6 <0.5 <0.5 ND <br /> Trichloroethene < <1. < , <1,0 <1, < <1.0 N <br /> Tn oro uoromet ane 1.7 1 16 30 8.0 23 is 12 <br /> 3,5- nmethy enzene <0.5 8.7 <0.5 < .5 <0.5 <0.5 <0.5 ND <br /> I,Z,4-I nmethy enzene <0.5 14 1.4 1.4 <0.5 <0.5 <0.5 <br /> Viny Unionde <0.5 <0.5 1. 7.2 <0.5 <0.5 145 130 <br /> m p xylene <0.5 3 <0.5 <0.5 1.3 <0.5 <0.5 ND <br /> o Xylene <0.5 4.6 <0.5 <0.5 <0.5 <0.5 <0.5 ND <br /> Not equire <br /> NT=Not Tested <br /> =Trace Concentration <br /> {1} Parameter also detected in one or more quality control blanks. <br /> S(MinteddW006 M M 4W M Mr <br />