Rehabilitation of six (6) filters at the Greenville WTP in Greenville, Texas. Includes replacement of underdrains and filter media, structural concrete coating, mechanical improvements to backwash, filter to waste, and air scour systems, and all associated electrical and site improvements. All questions are to be in writing through Civcast, or emailed to the engineer of record: Jay London, PE Hazen and Sawyer jlondon@hazenandsawyer.com The deadline to ask questions is 3/01/2022 5:00 PM CST Rehabilitation of the existing six media filters including concrete repair, construction of a new gullet wall, replacement of the filter media, underdrains, and washwater troughs including all appurtenant piping, supports, and fasteners. The work also includes the demo, removal and disposal of the existing backwash pump and furnishing and installing two new backwash pumps, starters, piping and appurtenances as indicated on the drawings. The work also includes the demo, removal and disposal of the existing air scour blower and furnishing and installing one blower in the existing location, and constructing an additional equipment pad and canopy and furnishing and installing a second air scour blower, starter, piping and appurtenances. 2. Filter pipe gallery and air scour piping butterfly valve and vane style pneumatic actuator replacement for all six filters. 3. Construction of a new precast filter-to-waste pump station, meter vault, yard piping and valves. 4. Retrofitting the existing filter drain boxes to accommodate new backwash waste discharge. 5. Electrical work to provide power and control wiring to the new facilities. 6. Concrete repair and driveway improvements where disturbed for the installation of backwash pumps and piping. 7. Miscellaneous civil improvements such as rerouting existing drain lines and sanitary sewer grinder pump forcemain, as indicated on the drawings. The deadline to ask questions is 3/01/2022 5:00 PM CST
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