Scope of work for the 4” DIP Sludge Recirculation Piping Project at Plum Creek Water Reclamation Authority facility is as follows:
Provide all supervision, coordination, labor, material, and equipment to install a new, second, common 4” discharge header at the existing centrifuge feed pumps. This header will feed three new 4” recirculation lines one for each of the three SNDR (Storage Nitrification Denitrification Reactor) tanks. Each of the three recirculation lines shall have a new manual isolation plug valve installed in the pump room upstream of penetrating the pump room wall above the existing pump suction lines. Piping shall be 125# flanged ductile iron, cement lined, and field coated with 10 mils high solids amine, polyamide, or polyamidoamine epoxy coating. To include all cored penetrations, double link-sealed with stainless steel hardware. Pipe supports to match existing. Installation coordinated with plant operations. Recirculation discharge centerline elevation into SDNR tanks ~5984.50. New pump discharge header centerline elevation ~5971.17. Existing suction piping centerline elevation ~5973.21.
- Tank Recirculation piping for SDNR #3 (Future) to be priced as Alternate #1.
- Alternate #2 to include installing two 4” ductile iron flanged tees and one plug valve on the existing centrifuge feed lines in the solids trailer room.
