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TCAAP Energy Integration Resiliency Framework Energy Source Implementation 46 companies with additional process or domestic hot water load would optimize the efficiency of the CHP system. 3.3. Low-Temperature District Energy System 3.3.1. Introduction The residential neighborhoods of TCAAP present a unique and highly visible opportunity to leverage low-grade energy from the treated groundwater as an energy supply for the neighborhoods, distributed via a low-temperature district energy system. The proposed system would utilize thermal energy from the TCAAP Groundwater Treatment station described in section 1.5.4 by transferring energy from the groundwater to the district energy system. The groundwater, which is consistently ~52o, can be used to transfer energy to and from the closed-loop distribution system to meet heating and cooling demand in the buildings, while not affecting the quality of the treated groundwater. The pumped groundwater is estimated to have 9.8 MMBtu of energy available. The Hill and Creek neighborhoods are projected to demand 68% of this energy. Thus, an additional 3.1 MMBtu could be available for utilization in other areas of TCAAP or AHATS. 3.3.2. System Description The proposed energy system would require an energy transfer station to be constructed at, or near, the current pumping location for the groundwater treatment station. This energy transfer station would consist of a heat exchanger to separate the groundwater from the system water, pumps to circulate the distribution loop, controls, metering, and piping. The existing building that houses the groundwater treatment station was originally the domestic water treatment plant for the TCAAP site during the ammunitions manufacturing period. This building was decommissioned, as the groundwater treatment system is housed in a building addition, and is now largely vacant. The facility is more than adequate to house the proposed energy transfer station. The building is owned by the Army, and will remain in the custody of the Army until the groundwater treatment operations cease. Given these conditions, there would need to be an agreement between the district energy district energy business and the Army for the use of this building. As noted in Section 1.5.3, the operations of the groundwater treatment system are anticipated to continue for a minimum of 30 years. By the end of this period, an alternative energy source may need to be identified should the groundwater pumping be discontinued or unavailable for energy transfer. At that stage, there would be multiple technologies that could be incorporated:  A separate field of geothermal heat exchange wells could be constructed in the vicinity of the energy transfer station.