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® ® • <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -5 <br />Sample Type: Air <br />Sampling Date 9/5/07 3/11/08 7/28/08 1/23/09 7/14/09 1/29/10 <br />Monitoring and Field Parameters <br />ethane oncentration (percent) 0 0 0 T 0 <br />Carbon Dioxide (percent) 20.5 4.5 2.2 5.1 NT 2.9 <br />Oxygen (percent) 3.2 13.5 18.3 4.6 NT 16.6 <br />Volatile Organic Compounds PPB (v/v) <br />Acetone <4.6 5.6 9.1 NT 5.4 <4.7 <br />Alpha-Chlorotoluene <br />Benzene <br /><1.1 <br /><1.1 <br /><1.0 <br /><1.0 <br /><1.2 <br /><1.2 <br />NI <br />N <br /><1.1 <br /><1.1 <br /><I,L <br /><1. <br />Bromodich oromethane <br /><1.1 <br />< .0 <br /><12 <br />NT <br /><1.1 <br /><1.2 <br />Brom <br /><1.1 <br /><1. <br /><1.2 <br />NT <br /><1. <br /><1.2 <br />Bromomethane <br />_ <br /><1. <br />< .0 <br /><1.2 <br />NT <br /><1.1 <br /><1.2 <br />Carbon Disulfide <br /><1.1 <br />< .0 <br />< .2 <br />N <br />6 <br /><1.2 <br />--------T,3=BButadiene <br />2- utanone <br /><1. <br />1.6 <br /><1.0 <br /><1.0 <br /><1.2 <br />< .2 <br />NT <br /><1. <br />< <br />< <br />< <br />ar on etrac ori e <br />< <br />< <br /><1.2 <br />T <br />< <br /><f2 <br />--Gloro enzene <br />< .1 <br /><1.0 <br />< <br /><1.1 <br /><1.2 <br />- ---Ch oro -et ane <br />< .1 <br />< .0 <br />< <br /><1,1 <br /><1. <br />Chloroform <br />1.7 <br /><1.0 <br /><1.2i <br />ff <br /><1. <br /><1.2 <br />C11 oromet ane <br /><4. <br /><4.0 <br /><4.8 <br /><4.6 <br /><4.7 <br />3- loropropene <br /><4.6 <br /><4.0 <br /><4.8 <br />NT <br />NT <br /><4.6 <br />2.4 <br /><4.7 <br /><1.2 <br /><1.2 NT <1.1 < <br /><1-, 2 N <1.1 < <br />E��,-romO <br />lromethane < .1 <1.0 <1.2 NT <1.1 <1.1-Dich oro enzene <T <1,0 <1.2 NT <1. <1.2 <br />1,3 -Dichlorobenzene <1. <1.0 <1.2 7. w <1.2 <br />ne <br />2-Dich oroethane <br />1,2- is oro- , ,2,2.Tetra luoroet ane (Freon 4) 8.1 6.6 1.7 T 7.1 5.4 <br />