Res07 14769 - Laserfiche WebLink

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03/27/2007 Mitigation 10-1. Prior to City approval of any future individual development proposal in the Precise Plan area, if determined necessary by the City Engineer, the City shall purchase from the SBSA the added treatment capacity necessary to accommodate the projected net increase in wastewater generated by the proposed development. Each future individual development's ultimate treatment capacity requirement shall be calculated in the final permitting stage. The project applicant shall reimburse the City for the costs associated with the individual development's fair share of the purchase of this treatment capacity (e.g., the capacity option itself, and associated administrative costs) and implementation of one of the transmission capacity improvement options listed below, the procedural details of which shall be included in either a project memorandum or development agreement for each project, at the discretion of the City Engineer. In order to mitigate the limited transmission capacity during wet weather from the Precise Plan area to the SBSA treatment plant, implementation of one of the following options would be necessary: (1) Upgrade the influent lifting station at the treatment plant, upgrade the treatment plant itself as necessary, install a new gravity sewer line from the SBSA pump station at Maple Street, and upgrade the pump station at Maple Street; or (2) Replace 21,000 feet of 6-inch, 3,600 feet of 8-inch, and 2,000 feet of 10-inch pipes within the Precise Plan area, and 24,500 feet of 6-inch pipes outside the Plan area, to reduce the wet weather flows. By replacing existing wastewater collection pipes, and thus reducing infiltration and inflow, the increase in ADDWF from Precise Plan-related growth would be mitigated, and the wet weather flow would not increase from Plan-facilitated development. An additional benefit would be the replacement of all substandard 6-inch pipes with City standard 8-inch pipes. Finding: Implementation of mitigation measure 10-1 would reduce Precise Plan Maximum Intensity alternative and cumulative impacts on wastewater treatment and transmission capacity to aless-than-significant level. Impact 10-2: Precise Plan-Related and Cumulative Impacts on Wastewater Treatment and Transmission Capacity--Moderate Intensity Alternative. Preliminary estimates indicate that the Moderate Intensity Precise Plan alternative could generate a total of approximately 507,475 gallons of average daily dry weather flow (ADDWF) per day, for a net increase over existing conditions of approximately 367,334 gpd. Redwood City already uses all of its allocated capacity from the SBSA treatment plant, but possesses an option to purchase an additional 1.915 million gallons per day (mgd) of dry weather Atty/Reso/Reso.1683 2 ~ 14769 030707 Muff #613