1. Place the pump station on bypass. 2. Remove the existing hatch lid only, the existing hatch frame is to remain in place. 3. Remove pumps, rails, and appurtenances as necessary to perform the work; remove piping to be replaced. The pump base, pumps, and guide rails shall be reused. 4. Clean & disinfect wetwell. 5. Furnish and install new discharge pipes, Class 52 flanged ductile iron pipe with interior coating Tnemec Series 431 Perma Shield Ceramic Epoxy and new Class 52 bends and fittings with interior coating Tnemec Series 431 Perma Shield Ceramic Epoxy. The new pipe shall connect the existing pump base to the existing thru-wall discharge piping using new 6” flange 90d bends. a. All pipe and fitting connections shall be flange to flange. b. All fasteners are to be 316 SS. c. All interior coatings shall be factory-applied. The Contractor shall have Perma Shield ceramic epoxy in the field to “touch up” pipe edges prior to installation. d. The exterior pipe shall be coated with Series 37H Chem-Prime (Gray), Series 66 Hi Build Epoxiline (Field Green), and Series N69 Hi-Build Epoxiline II (Hunter Green). The Series 37H shall be factory applied. Series 66 and N69 coatings may be applied in the field. All coatings are to be applied per manufacturer recommendations. 6. Reinstall the pumps and rails. 7. Furnish and install Haliday F1R 3648 Hatch with safety grate. Install new hatch frame thru existing aluminum hatch frame into concrete with 3/8 316 SS wedge anchors per manufacturer recommendations. 8. Start up pumps and remove bypass.
