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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -2 Intermediate <br />Sample Type: Air <br />Sampling Date 9/29/03 2/12/04 5/7/04 7/22/04 11/8/04 2/10/05 9/29/05 6/26/06 11/18/06 3/2/07 <br />Monitoring and Field Parameters <br />Met ane Concentration (percent) 9 0 0 2.9 3.3 8.1 0 0 0 <br />Carbon Dioxide (percent) NT NT NT NT NT NT NT NT NT 1.8 <br />Oxygen (percent) NT NT NT NT NT NT NT NT NT 17.6 <br />Volatile Organic Compounds PPB (v/v) <br />Acetone <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <br />.5 <0.5 <br />wcl <br />Bromodich oromethane <br />.:;;! - <br />- rtzom® orm <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Benzyl Cilor�l e <br />Brom®riietfiane <br />< .p <br /><0.5 <br />< <br /><0.5 <br />< .0 <br /><U.5 <br /><1.0 <br /><0.5 <br /><1.0 <br /><0.5 <br /><1.0 <br /><0.5 <br /><1.0 <br />30 <br /><1.0 <br /><0.5 <br /><1.0 <br /><0.5 <br /><1.0 <br /><0.5 <br />�Disu( ide <br /><0.5 <br />< .5 <br /><0.5 <br />.5 <br />< .5 <br />< .5 <br />-Butadiene <br />- utanone <br /><0.5 <br /><0.5 <br /><.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 />-Car60n etrac ®ride <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />�Fiforobenzene <br /><0.5 <br /><0.5 <br /><0.5 <br />4.6 <br />3.7 <br />< .5 <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Cii�roethane <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 /><U.5 <br />/oro orm <br /><0.5 <br /><0.5 <br />1.7 <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br />8.4 <br />1.6 <br />2. <br />Chloromethane <br /><0.5 <br /><0.5 <br /><0.5 <br />1. <br />< <br />< .5 <br />27 <br /><0.5 <br /><0.5 <br /><0.5 <br />3-Chloropropene <br />NT <br />T <br />NT <br />NT <br />NT <br />N <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.05- <br />5 <br />1- isi Iorobenzene <0.5 <0.5 <0.5 <0.5 <0.5 <U.5 <U.5 <U.5 <u.o <u.o <br />�,3-Dic Ioro enzene <0.5 <0.5 <0.5 < < .5 <0.5 <0.5 <0.5 < <0.5 <br />,4-Dic oro enzene <0.5 1.6 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 < .5 <br />Dichlo- roti luoromethane (Freon 12) 32 64 6.0 62 23 712 11 <0.5 < .5 < .5 <br />;,1-Oichoroethane <U.5 <0.5 <0.5 <0.5 <0.5 <0.5 < .5 <0.5 <0.5 <0.5 <br />