Specifications include, but are not limited to: 1. Anaerobic Digester No. 3 Structural Lid Repairs: a. Hydro-demolition and replacement of edge of concrete lid and associated accessories such as water stops, joint material, and joint sealant. b. Removal and re-installation of existing railing around perimeter of lid. c. Watertightness testing as described in Specification Section 01 45 25. 2. Digester Complex Exterior Repairs: a. Cleaning of exterior precast concrete of all six digesters. b. Repair of precast concrete connection damage on all six digesters. c. Replacement of precast concrete joint sealant on all six digesters. d. Concrete cover crack injection on Anaerobic Digesters Nos. 2 through 6. 3. Digester Complex Level Instrumentation Installation: a. Installation of new level instrumentation at the central dome of Anerobic Digesters Nos. 2 through 6. b. Connection of these instruments to electrical and controls panels in adjacent digester control buildings.