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GREAT RIVER ENERGY <br />Elk River Peaking Station May 5, 2008 <br />Air Permitting Summary <br />GRE and the Minnesota Pollution Control Agency (MPCA) are working together to <br />finalize the draft air permit. <br />A 30-Day Public comment period on the draft air permit will begin within 2 weeks. <br />Notice will be published in the Star Tribune and the Elk River Star News. <br />No public meetings are planned. <br />The air permit will authorize construction and operation of the Combustion Turbine. <br />The air permit for the entire campus is expected to be reissued within a year. <br />Air Emissions Risk Analysis: <br />• An air emission modeling and health impacts study was required for the air permit. <br />• The study is based on permitted emissions levels. The RDF plant actual emissions <br />rate is -20% of the permitted levels. <br />• The study shows that impacts from the combustion turbine are below Minnesota <br />Department of Health (MDOH) guideline thresholds. <br />• The study shows that residential impacts from the existing RDF combustor are <br />below MDOH thresholds. <br />• The study shows that cancer risks due to the existing RDF combustor would exceed <br />MDOH thresholds if there were any "subsistence farmers" located west of the plant <br />on the other side of the Mississippi river (City of Otsego). This area is currently <br />zoned agricultural. The City of Otsego's Comprehensive Use Plan and Future <br />Land Use map lists this area as commercial/residential. <br />• The primary exposure route for the elevated farmer risk is through the consumption <br />of beef and dairy products produced onsite. Currently, there is no beef or dairy <br />production on the properties. <br />• GRE has proposed to the MPCA that GRE conduct monthly visual inspections of <br />the agricultural zoned land bounded by Wright County Road 39, Parish Ave, and the <br />3of4 <br />