55B - RESO - EIR SAN LORENZO SEWER LIFT

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Chapter I Introduction The Project will consist of a newly constructed lift station that will be housed within a block structure. The following facilities will be installed within or beneath the block structure: electrical panels and control center; a below-ground wet well of sufficient size and depth to prevent back up and surcharging of the upstream sewer mains; a below-ground dry well to house the pumps, motors, associated equipment and appurtenances; a gravity odor control system; and a stairway access into the dry well. Landscaping and hardscape improvements are included as part of the new lift station. The Project includes the repaving of a portion of the western end of San Lorenzo Avenue, portions of an existing alley, and a portion of West Segerstrom Avenue, along with the installation of new sidewalks in areas where existing sidewalks have fallen into a state of disrepair and/or will be demolished during lift station construction. Some existing landscaping along West Segerstrom Avenue will remain. The Project also includes the installation and operation of approximately 1,300 linear feet of new underground sewer infrastructure, including approximately 560 linear feet of 15-inch gravity sewer pipe; approximately 190 linear feet of 12-inch gravity sewer pipe; approximately 545 linear feet of 10-inch force main; and sewer manholes and appurtenances. Construction of these new facilities will occur beneath the paved rights-of-ways of South Bristol Street and West Segerstrom Avenue. The new infrastructure will be needed to connect several existing sewer mains to the new proposed San Lorenzo Lift Station. After construction of the San Lorenzo Lift Station is complete and the new subsurface sewer pipes and manholes are installed, the new lift station will move effluent through the station and into gravity sewer lines, which will convey the sewerage to the Orange County Sanitation District's (OCSD) Reclamation Plant No. 1, located in the City of Fountain Valley adjacent to the Santa Ana River. Effluent will continuously flow through the San Lorenzo Lift Station and will not be stagnant. The new lift station will replace the Segerstrom Lift Station and will not increase the capacity of the City's existing sewer system. The new lift station facility will be constructed with odor control devices and the City will regularly monitor the facility to ensure it is functioning properly. After the new San Lorenzo Lift Station has been constructed and is in operation, demolition of the existing Segerstrom Lift Station will occur. Demolition activities will involve abandonment in place of the existing lift station, including the removal and disposal of all lift station equipment and filling of the existing wet well manhole with sand. An existing generator, located southerly of the existing lift station, will remain in place and will serve as a back-up power source for the proposed new San Lorenzo Lift Station. Some removal and replacement of existing sidewalk and roadway pavement will occur in association with proposed demolition activities. Demolition of the existing Segerstrom Lift Station will occur in conformance with all applicable federal, state, and local regulations and standards. Resurfacing of roadway segments disturbed by Project construction will occur. CEOA Compliance As described in Section 1.3.1 of the Draft EIR, the City originally prepared and processed a Mitigated Negative Declaration (MND) for the proposed Project in December 2008. The MND and was adopted by the City Council on February 2, 2009. However, the MND was challenged in California Superior Court by an adjacent property owner, and the Court ordered the lead agency to vacate its approval of the MND and required preparation of a project EIR. The City published a San Lorenzo Lift Station EIR (Project No. 06-3510) 1-1 Findings of Fact/Statement of Overriding Consider658 _ 13