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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -8 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11/04 5/7/04 7/22/04 11/17/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 8/20/07 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 <0.5 2.3 2.9 14 6.0 51.6 <0.5 270 270 800 490 <br /><0.5 1.0 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 7.8 <0.5 <0.5 <br />Freon 114 <0.5 <0.5 < <0.5 <0.5 <br />1 -AChloromethane < .5 < .5 <0. < <0.5 <br />1,3 -Butadiene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />N T <br />N i <br />N i <br />1141 <br />Bromomethane <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 /><0.5 <br />Chloroethane <br /><.5 <br /><. <br /><. <br /><. <br />< <br /><.5 <br /><0. <br /><, <br /><,5 <br />< <br /><0. <br />Freon 11 <br /><0.5 <br />1.0 <br /><0.5 <br />10 <br />3.6 <br />38 <br /><0.5 <br />170 <br />170 <br />460 <br />300 <br />Ethanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Freon 113 <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 />8.7 <br /><0.5 <br />16 <br />1,1-Dichloroethene <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 /><0.5 <br />Acetone <br />NT <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 />2 -Propanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Carbon Disulfide <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><p.5 <br /><u.5 <br /><U.* <br /><u.a <br />w.o <br />3 -Chloro ro ene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Methylene_ Chloride <br />6.0 <br />1.7* <br /><1.0 <br /><1.0 <br />0.8 <br /><1.0 <br />163 <br /><0.5 <br />163 <br /><1.0 <br /><1.0 <br />Methyl tert-but l ether <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />trans-1,2-Dichloroethene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Hexane <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 /><1.0 <br />- is oroetane <br />< <br /><.5 <br /><.5 <br />< <br />< <br />< <br /><.5 <br /><.5 <br /><.5 <br />< <br />0 <br />2- Butanone (Methyl Ethyl Ketone) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />< <br />NT <br />< <br />L;rnorororm <br />4 4 --- NT NT NT NT NT NT NT NT NT NT NT <br />