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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 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 1300 260 1300 600 440 <br />Freon 114 <0.5 9.5 <160.0 16 <58 <br />Chloromethane < < ` ` `2 <br />1,3 -Butadiene <br />NT <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />Bromomethane <br /><0.5 <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />Chloroethane <br /><0.5 <br />< <br /><160.0 <br />` <br />` 58 <br />Freon 11 <br />880 <br />220 <br />960 <br />400 <br />430 <br />Ethanol <br />NT <br />18 <br /><650.0 <br /><6.3 <br /><230 <br />Freon 113 <br /><0.5 <br />11 <br /><160.0 <br />13 <br /><58 <br />1,1-Dichloroethene <br /><0.5 <br />13 <br /><160.0 <br /><1.6 <br />110 <br />Acetone <br /><0.5 <br />18 <br /><650.0 <br />8 <br /><230 <br />2 -Propanol NT <br /><4.1 <650.0 <6.3 <230 <br />Carbon Disulfide <br /><0.5 <br /><1.0 <br />< <br />< <br /><58 <br />3-Chloropropene <br />NT <br /><4.1 <br /><650.0 <br /><6.3 <br /><230 <br />Methylene Chloride <br /><1.0 <br />1.6 <br /><160.0 <br /><1.6 <br /><58 <br />Methyl tert-butyl ether <br />NT <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />+rnnc_1 7-Mt-hinrncfhcno <br />NT <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />Hexane <1.0 <1.0 <160.0 <1.6 <58 <br />- Ic oroet ane < < <165.0 < <58 <br />2-Butanone (Methvl Ethvl Ketone) NT 3.8 <160.0 <1.6 <58 <br />Vioform <0.5 <1.0 <1bu.0 <'I.b <ou <br />1 1 1-Trirh1nrnafhnna NT <1.0 <160.0 2 <58 <br />