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CX-001551: Categorical Exclusion Determination

Energy Efficiency and Conservation Block Grant (EECBG) Small Cities and Counties Initiative (sub grant): Rowan County Fiscal Court Office Heating, Ventilating, and Air Conditioning (HVAC) Upgrade
CX(s) Applied: B5.1
Date: 04/15/2010
Location(s): Rowan County, Kentucky
Office(s): Energy Efficiency and Renewable Energy, Golden Field Office

This National Environmental Policy Act (NEPA) determination is for the proposed project to install a new geothermal heating, ventilating, and air conditioning (HVAC) system which will provide heating and cooling for the newly constructed 14,000 square foot Rowan County Fiscal Courthouse. The proposed ground source heat pump system will be a closed loop, vertical system and have a capacity of 56 tons. The site location for the proposed project is a vacant lot in a residential area of the city of Morehead, Kentucky. The Ground Source Heat Pump (GSHP) system will require the drilling of 45 boreholes to a depth of 300 feet. At no point during operation will any interaction take place with the groundwater. All drilling will be done by an installer with current IGSHPA certification following all IGSHPA guidelines as well as local and state laws, ordinances, and regulations as they pertain to buried pipe systems. The proposed project will comply with the National Pollutant Discharge Elimination System regulations. All boreholes will be grouted with thermally enhanced bentonite grout that is designed to withstand cracking from the changes in temperature between the ground and the heat exchange pipe. This ensures that the area around the borehole is sealed to keep any surface runoff from contaminating soil or groundwater. The system will employ high density polyethylene pipe that is heat fused at the joints which really minimizes the risk of leaks in the system preventing possible contamination of soil and groundwater sources. The refrigerant being used is a non-toxic mixture equivalent to a 28% Environol 1000 solution. Erosion and sediment controls that have been put in place for construction of the new building will be sufficient for the installation of the geothermal well field. The recipient stales that all site conditions will be returned to original conditions. This will include backfilling, soil compaction, seeding, and general restorations to previous conditions.

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