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Ed Padilla <br /> March 14, 1997 <br /> Page 2 <br /> 3 . Describe the landfill in relation to surrounding land use. <br /> The Corral Hollow Sanitary Landfill is located at the <br /> intersection of Interstate 580 and Corral Hollow Road. <br /> There are no structures within approximately one mile of the <br /> site in any direction. Surrounding land use is largely <br /> grazing or open space. <br /> 4 . Provide "projected gas generation" data. <br /> Attached is landfill gas generation data as predicted by the <br /> Environmental Protection Agency's Landfill Air Emissions <br /> Estimation Model . The parameters for this model are as <br /> follows and are based on current actual data from the <br /> existing Harney Lane Sanitary Landfill flare: <br /> Methane % 40% average <br /> Non-Methane Organic Compounds 561 parts per million <br /> Generation Potential 59 cu. Meters/Mega Gram <br /> This model requires that waste acceptance rates be entered <br /> per year. The waste acceptance rate was calculated <br /> backwards from the closure year of 1995 at an annual <br /> decrease of 5%. <br /> As shown on the attached generation data, methane emission <br /> peaked in 1995 at 3 .3 million cubic meters. Methane <br /> emission decreases to approximately 2 million cubic meters <br /> in 2005 and 1.25 million cubic meters in 2015. Methane <br /> emission is currently declining as predicted by the model . <br /> Although the model is based on data from Harney Lane, <br /> methane generation at the Corral Hollow Sanitary Landfill is <br /> expected to be somewhat less than Harney Lane because of its <br /> size and lesser volume of precipitation. <br /> The County acknowledges that gas concentrations at the perimeter <br /> gas wells exceed regulatory limits. However, we do D-Qt believe <br /> the gas migration at the site presents a threat to public health. <br />