The Clean Water Plan will increase ALCOSAN’s wastewater treatment capacity from 250 million gallons per day (mgd) to 600 mgd. Construction of a new East Headworks facility to accommodate additional wastewater is necessary. This facility is where wastewater receives the initial treatment process, including grit removal and screenings. The new East Headworks facility will adjust for additional flows by housing six grit tanks, six bar screens and a grit truck unloading station. The East Headworks will provide preliminary treatment for a peak flow of 360 MGD. This contract is part of the overall wet weather plant expansion and will generally include the following: • Modification of the Main Pumping Station to direct flows to the East and West Headworks facilities • 120-inch diameter conduit between the Main Pumping Station and the East Headworks • Six (6) mechanically cleaned bar racks and screenings conveying • Six (6) aerated grit tanks, grit pumping, concentrating and classifying equipment • Operations area that includes a control room, locker room, and break area • Removal of the West Headworks venturi flow meter. • Replacement of the 120-inch diameter primary influent conduit • East, West and Center Primary Influent Conduits • Upgrade of the Headworks Odor Control System • Modification of existing below grade pipe galleries • Various modifications to the existing West Headworks
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