Categorical Exclusion

Tennessee Valley Authority (TVA)

Exclusion Text

37. Modifications, upgrades, uprates, and other actions that alter existing buildings, infrastructure systems, facility grounds, and plant equipment, or their function, performance, and operation. Such actions, which generally will not physically disturb more than 10 acres, include but are not limited to, the following: a. Replacement or changes to major components of existing buildings, facilities, infrastructure systems, facility grounds, and equipment that are like-kind in nature; b. Modifications, improvements, or operational changes to in-plant and on-site equipment that do not substantially alter emissions or discharges beyond current permitted limits. Examples of equipment include, but are not limited to: Gear boxes, generators, turbines and bearings, duct work, conveyers, superheaters, economizers, air preheaters, unloading and handling equipment for fuel; handling equipment for ash, gypsum or other by-products or waste; hydropower, navigation and flood control equipment; air and water quality control equipment; control, storage, and treatment systems (e.g. automation, alarms, fire suppression, ash ponds, gypsum storage, and ammonia storage and handling systems); and other operating system or ancillary components; c. Installation of new sidewalks, fencing, and parking areas at an existing facility; d. Installation or upgrades of large HVAC systems; e. Modifications to water intake and outflow structures provided that intake velocities and volumes and water effluent quality and volumes are consistent with existing permit limits; f. Repair or replacement of doors, windows, walls, ceilings, roofs, floors and lighting fixtures in structures greater than 50 years old; and g. Painting and paint removal at structures greater than 50 years old, including actions taken to contain, remove and dispose of lead-based paint when in accordance with applicable requirements.