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n <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 8/20/07 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 9/3/10 1/25/11 7/29/11 4/12/12 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB (v/v) <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><1t$ <br />Freon 12 <br />1900 <br />620 <br />3000 <br />4200 <br />3400 <br />1900 <br />810 <br />250 <br />350 <br />740 <br />Freon 114 <br />75 <br />24 <br />130 <br />190 <br />120 <br />75 <br />36 <br />10 <br />16 <br />32 <br />Chloromethane <br /><0.5 <br /><0.5 <br /><38.0 <br /><4 7.0 <br /><5 <br />< 5 <br /><12 <br /><4.7 <br /><4.8 <br /><28 <br />VinylChloride <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br /><1 <br />< .3 <br />< .9 <br /><1.2 <br /><1.2 <br /><2.8 <br />1 I_Ri iiariiana <br />NT <br />NT <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />Bromomethane <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><1t$ <br />Chloroethane <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br />< 3 <br /><6. <br />< 2.9 <br /><1.2 <br /><4.8 <br /><11 <br />Freon 11 <br />680 <br />240 <br />1200 <br />1300 <br />1000 <br />910 <br />330 <br />110 <br />240 <br />340 <br />Ethanol <br />NT <br />NT <br /><38.0 <br /><47.0 <br /><51 <br /><25 <br /><12 <br />17 <br />330 <br /><11 <br />Freon 113 <br />41 <br />13 <br />69 <br />96 <br />58 <br />63 <br />18 <br />5.4 <br />9.5 <br />17 <br />1,1-Dichloroethene <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />Acetone <br />5.3 <br /><0.5 <br />48 <br /><47.0 <br /><51 <br /><25 <br /><12 <br />11 <br />7.4 <br /><28 <br />2 -Propanol <br />NT - <br />NT <br /><38.0 <br /><47.0 <br /><51 <br /><25 <br /><12 <br /><4.7 <br /><4.8 <br /><11 <br />Carbon Disulfide <br /><0.5 <br />2.8 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><4.8 <br /><11 <br />3 -Chloro ro ene <br />NT <br />NT <br /><38.0 <br /><47.0 <br /><51 <br /><25 <br /><12 <br /><4.7 <br /><4.8 <br /><11 <br />Meth lene Chloride <br /><1.0 <br /><1.0 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><28 <br />Methyl tert-butyl ether <br />NT <br />NT <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />trans-1,2-Dichloroethene <br />NT <br />NT <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />Hexane <br /><1.0 <br /><1.0 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />1, - is oroet ane <br /><0.5 <br /><0.5 <br />< .5 <br />< 0 <br /><1 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />2-Butanone (Methyl Ethyl Ketone) <br />19 <br />5.8 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><4.8 <br /><11 <br />cis-1.2-Dich o-� roethene <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br />< <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2. <br />etrahy ro uran <br />< .5 <br />94 <br /><9.5 <br /><12.0 <br /><1 <br /><6.3 <br /><2.9 <br /><1.2 <br />< .2 <br /><2.8 <br />h oro orm <br /><0.5 <br /><0.5 <br /><9.5 <br />< 2.0 <br /><1 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1. <br /><2.8 <br />1,1,1- 1 ricloroet ane <br /><0.5 <br />10.5 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br /><1.2 <br /><2.8 <br />