This environmental assessment (EA) addresses the potential environmental impacts of a proposed project located at the Morgantown, West Virginia, site of the National Energy Technology Laboratory (NETL). The Performance Verification Laboratory (PVL) project was proposed in response to the American Recovery and Reinvestment Act (ARRA) Facilities and Equipment Upgrade Lab Call #09-002. NETL will design, construct, and make operational a U.S. Department of Energy (DOE) PVL facility for verifying the energy performance of selected appliances and equipment to facilitate improved enforcement of DOE energy conservation standards and DOE/Environmental Protection Agency (EPA) ENERGY STAR(R) programs. The PVL facility will build upon the capabilities of NETL's existing Appliance Technology Evaluation Center (ATEC). Currently, ATEC is used to help DOE improve its test procedures through experimental investigations (testing and other evaluations) of appliances/equipment. PVL will expand the current ATEC capabilities and add large-scale performance verification testing that will complement DOE's increasing focus on emerging equipment and appliance standards activities. The resulting data from this facility will enhance existing standards and test procedure development at NETL, as well as provide a valuable resource to support compliance and enforcement activities for the Energy Conservation Standards program within DOE. Executive Order 13123, "Greening the Government Through Efficient Energy Management," requires federal agencies to improve their environmental and energy performance and to meet specified environmental performance goals. Constructing an energy efficient "green" building would allow NETL to reduce electricity use and meet environmental performance goals. This EA has been prepared to satisfy requirements of the National Environmental Policy Act (NEPA) of 1969 (42 United States Code 4321 et seq.) and its implementing regulations found in Title 40, Code of Federal Regulations (CFR), Parts 1500-1508 (Council on Environmental Quality) and Title 10, CFR, Part 1021 (Department of Energy). Results of this assessment indicate that the construction activities associated with the proposed project would potentially have minor impacts on permitted discharge areas, groundwater, and greenhouse gases (GHGs). An increase in the number of cars and trucks associated with the construction activities would negatively impact traffic and public facilities and services. Operation of heavy machinery during construction would also have an adverse effect on air quality (i.e., dust and exhaust particulate air emissions) and increase noise and vibration in the immediate vicinity of the work area. These effects would be controlled to the greatest extent possible to minimize their impact. The construction of the PVL facility would positively impact the local area through the creation of 24 jobs. Operation of the PVL facility would result in the creation of approximately 14 permanent jobs at the Morgantown NETL site, most of which would be new hires. Traffic and public facilities and services would be negatively impacted by the increased flow of cars and delivery trucks to the new facility. Because the operation of this facility would support the increased penetration and acceptance of energy-efficient appliances and equipment in the marketplace, the work done at the PVL would ultimately contribute to a reduction in GHG production.