South Dakota Specific Files

	Screening Level Health Risk Assessment (1193.37kb) April 23, 2008	PDF
	A report concerning an assessment of the potential carcinogenic health risk to South Dakotans in Union County from the Hazardous Air Pollutants (HAPs) that would be emitted from the Hyperion Energy Center. You will find that the results of the assessment show an estimated cancer risk below the US EPA’s standard for protection of residential populations. This assessment was performed using the established methodology used by the US EPA for similar reviews of existing refineries in the United States. The assessment shows that the likelihood of any one individual contracting cancer due to inhalation of emissions from the Hyperion Energy Center is less than 1 in 1,000,000. This probability is reached by using a model that includes a theoretical exposure of 24 hours a day for 70 years. The estimated cancer risk is 3,000 times less than the existing cancer incidence rate in Union County as reported by the South Dakota Cancer Registry.
	Siouxland Economic Impact Study (207.65kb) April 21, 2008	PDF
	The economic impact of the Hyperion Energy Center on the South Dakota and greater Siouxland economies by Stuefen Research, LLC.
	Siouxland Industrial Roundtable Presentation (1582.45kb) April 3, 2008	PDF
	Presentation given by J. Louis "Corky" Frank on April 3rd, 2008.
	Rezoning PD Boundary Map (364.06kb) March 11, 2008	PDF
	The final PD boundary for rezoning at the Siouxland Site.
	PD Ordinance As Adopted in South Dakota (917.97kb) March 11, 2008	PDF
	Planned Development Ordinance in its Final Adopted Format
	Summary of the County's Changes to the PD Application (56kb) March 11, 2008	PDF
	Changes made to the Planned Development application by Union County
	Planning and Zoning Binder (10605kb) January 10, 2008	PDF
	Documents submitted at Planning and Zoning meeting.
	Rezoning PD Boundary with Transition Zone (214kb) January 6, 2008	PDF
	The proposed PD boundary with the transition zone for rezoning at the Siouxland Site.
	Air Permit Application (11732kb) December 10, 2007	PDF
	Hyperion files with SD DENR an air permit application.
	Open House Station Summaries (382kb) December 10, 2007	PDF
	During the open house presentations to the public in South Dakota, Hyperion provided summaries of each station.
	Rezoning PD Application (10213kb) December 6, 2007	PDF
	Hyperion has filed an application to rezone land in Union County.
	Resident Mailer (628kb) August 13, 2007	PDF
	Hyperion sends out an informational mailer to surrounding residents of the proposed Siouxland site.