Specifications include, but are not limited to: A. The W.B. Casey WRRF currently has four (4) Secondary Basins, however, only three (3) basins will be part of this project; each secondary basin is approximately 161’-0 outside diameter inside edge of outer launder wall (see attachments). The Shoal Creek WRF has two (2) Secondary Basins which will be a part of this project; each basin is approximately 104’-0 inside diameter of outer structure wall & approximately 98’-0 inside diameter of inner structure wall (see attachments). Cover installation shall be located around the entire circumference of the clarifier. Separate cover systems are required for each of the Shoal Creek WRF Basin’s inner & outer structure walls. Installation shall include all required supports, anchors, guardrails, gaskets, hardware, brackets, fasteners, easy-open flaps, and panels to complete the work. B. One (1) easy-open flap will be provided for each basin. C. Only one (1) basin will be out of service for the installation of the launder covers at W.B. Casey WRRF and at Shoal Creek WRF. The total of the project should not exceed fourteen (14) calendar days. Contractor is responsible for mobilization/ demobilization, shipment of delivered material. The contractor is responsible for the removal of trash and debris and leaving the site in a clean condition. D. The Clayton County Water Authority (CCWA) will drain the basin which will be receiving the installation of the launder covers and will remove all algae and scum prior to installation, including hose washing the walls and floors. CCWA will ensure that water is not entering the basin and the entire work area is dry. Once the work is complete, CCWA will refill the basin. E. The launder covers should inhibit algae growth, operate 24 hours a day, 7 days a week, reduce manpower, contain odors, and be corrosion and maintenance free. The cover system should be surface mounted to the outside perimeter concrete tank wall with anchors, fasteners, brackets for installation and support. Launder covers shall be designed to open away from the operator and toward the center of the tank or back toward the operator and outside of the tank. The launder covers must have unobstructed access to the troughs, weir plates and the space between the weir plate and the sum baffle for necessary inspection and cleaning. The launder cover should also include one easy-open flap for quick site inspection of structure.
