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MONITORING VERIFICATION IDENTIFIED IMPACT RELATED MITIGATION MEASURE Implementation Monitoring and Timing Signature Date Enti Verification Ent' Re ufrements day, for a net increase over existing the proposed development Each future conditions of approximately 367,334 gpd. individual development's ultimate treatment Redwood City already uses all of its allocated capacity requirement shalt be calculated in capacity from the SBSA treatment plant, but the final permitting stage. The project possesses an option to purchase an applicant shall reimburse the Ciry for the additional 1.915 million gallons per day (mgd) costs associated with the individual of dry weather capacity. The project- development's fair share of the purchase of generated ADDWF increment of 367,334 gpd this treatment capacity (e,g., the opacity (0.367 mgd) is less than the City's purchase option itself, and associated administrative option of 1.915 mgd. costs) and Implementation of one of the transmission capacity improvement options In recent years, wastewater flow to the SBSA fisted below, the procedural details of which collection system from Redwood City has shall be included in either a project ocosionally exceeded the current peak wet memorandum or a development agreement weather flow capacity right (exclusive of for each project, at the discretion of the City Redwood Shores) of 25.9 mgd. Since 1994- Engineer. 95, the City has exceeded its allocated capacity nine times during the winter. Since In order to mitigate the limited Transmission the SBSA treatment capacity allocation to capacity during wet weather from the Redwood City is already being exceeded Precise Plan area to the SBSA treatment during wet weather, the currant allocation plant, implementation of one of the from the SBSA is inadequate to serve the following options would be necessary: project's projected Moderate Intensity alternative ADDWF increment in addition to (1) Upgrade the influent lifting slation at the existing SBSA commitments. Because the treatment plant, upgrade the treatment SBSA wet weather treatment gpacity plant itself as necessary, install a new allocation to Redwood City is already being gravity sewer line from the SBSA pump exceeded, the Precise Ptan Moderate station at Maple Street, and upgrade the Intensity altemative-related and cumulative pump station at Maple Street; or impacts on wet weather flow treatment capacity are considered to represent a (2) Replace 21,000 feet of 6-inch, 3,600 potentfafty sfgnffrcant project and feet of 6-inch, and 2,000 feet of 10-inch cumulative Impact. pipes within the Precise Plan area, and 6,200 feet of 6-inch pipes outside the Plan area, to reduce the wet weather flows. By replacing existing wastewater collection pipes, and thus redudng infiltration and inflow, the increase in ADDW F 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. Implementation of this measure would reduce the Precise Plan Moderate Intensity alternatve and cumulative impacts on tD ~~ Pegg zi U:1My DocumentslDownfown Precise PlantCC staff reportslCC 3. f 2.doct3. f2.07 ExhibitstAttachment A mil menttoring checklist 655.d~ D