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Wastewater Capacity and Estimated Flow - West and South Regional WWTFs Figure 3 10.0 Treatment Capacity =i Demand with Concurrency Demand less Concurrency 8.0 6.0 -- v — a E LL 4.0 --.— . 2.0 _ 0.0 2000 2005 2010 2015 2020 2025 2030 Years North Regional WWTF and Central Regional WWTF The North Regional WWTF was designed as a 0 . 85 MGD AADF biological treatment system . The plant includes influent screening , influent equalization , grit removal , an extended aeration biological process train which includes an anoxic basin followed by an oxidation ditch featuring "boat" type internal clarification , traveling bridge filters and a chlorine contact tank . Excess solids are stored in a sludge holding tank. A small septage receiving station is also located at the North Region WWTF . The current effluent disposal for the facility when it is operating is pumped to the Sand Ridge Golf Course where it is used for irrigation . An onsite earthen basin is used for storage of effluent not meeting specification standards . A submersible pump station is located in the pond to return non-spec water to the head of the plant . The North Regional WWTF is operated only when necessary to handle peak flows and acts as a repump station the majority of the year, sending wastewater to the Central Regional WWTF . This operational mode created a zero flow situation for this facility in the current reporting . Since the facility works concurrently with the Central Regional WWTF it is important to review both service areas for new growth in this effort . The current AADF at the North Regional WWTF and Central Regional WWTF are 0 . 0 MGD and 1 . 93 MGD , respectively, as compared to current permitted capacities of 0 . 85 MGD AADF and 2 . 0 MGD AADF . The Central Regional WWTF is under a current expansion to increase its capacity to 4 . 0 MGD AADF , ITS� 6 IRC WWTF Expansion May 2005