AgdaPkt 2007-03-12 - Laserfiche WebLink

Browse Search

7A Page 37 the projected Maximum Intensity alternative ADDWF increment in addition to existing SBSA commitments. Because the SBSA treatment capacity allocation to Redwood City is already being exceeded, the Precise Pian Maximum Intensity alternative-related and cumulative impacts on wet weather flow treatment capacity are considered to represent a potentially significant project and cumulative impact. 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 itsel#, 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 ei#her 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 fee# of 8-inch, and 2,000 feet ofi 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 fram 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 ales-than-signiflcant level. Impact 10-2: Precise Plan-Related and Cumulative Impacts on Wastewater Treatment and Transmission Capacity--Moderate Intensity AttylReso/Reso.1683 2p 030707