Dominion Valley WST Rehabilitation including the following: • Mobilization/Demobilization and Close-Out, including Tank Disinfection and Hydraulic testing. • Existing Conditions: Clean up vegetation, perform site grading for overflow discharge, modify overflow pipe splash pad with curbing, protect existing equipment, modify sampling station drain discharge at floor drain, and rotate existing overflow pipe duckbill valve by 90 degrees. • Concrete: Concrete and grout repair and recoating on interior and exterior tank base. • Miscellaneous Metals: Modify 6 Interior Dry ladders, install Safety Gates on platforms, replace ladder L6, and replace existing tube-style and notched rail cable fall protection devices with stainless steel cable safety climb fall protection, and 2 full safety harnesses and appurtenances. Provide new ladder bars and fall protection device to access the drainpipe valve. Replace overflow weir box and add Overflow Safety Valve, and add thrust support on interior dry. Remove painters rail, provide roof rigging ports, and reinforce compression ring. Manway modifications to six manways. • Thermal and Moisture Protection: Apply Spray-in-Place insulation and purchase Notice to Bidders Page 2 of 5 and install two new unit heaters and replacement of existing temperature controlled exhaust fan. • Openings: Repair person door and jam, provide surface preparation and coating, and replace lock set. Weather proofing doors, clean-up, and confirming door contacts are secure and aligned. • Finishes: Perform interior and exterior surface pit repairs. Interior Dry surface cleaning, power tool clean, surface preparation, and coatings. Interior Wet surface repairs, abrasive blasting, and coatings. Exterior surface repairs, power tool clean, and overcoat, including anti-graffiti coating on first ten (10) feet of tank side wall. • Specialties: Furnish and install tank plaque and safety signage.
