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Mountain House Master Plan Specific Plan I Mitigation Monitoring Program The following drainage mitigation measure from the Mountain House Master Plan and Specific Plan I Mitigation Monitoring Program are applicable to the proposed project. ► Mitigation Measure 4.4.3-1 (Maintenance of Detention Ponds). Any proposed plans for construction or grading which include a detention basin shall include a proposed schedule and description of necessary routine maintenance activities for such detention basin(s)(including access roads). The maintenance plans ` may be in the form of a general operations and maintenance manual or may be specific to the detention basin(s)for which constmction/grading plans are being submitted. College Park at Mountain House Specific Plan 1112004 The following measures from the College Park at Mountain House Specific Plan III are applicable to drainage. ` ► Implementation Measure 15.23(a).Each segment of the storm-drainage system shall be designed as needed to provide protection for each phase of development. ► Implementation Measure 15.23(c).Prior to submittal of any development permit a will-serve letter for storm drainage and flood control,will be obtained from the Mountain House CSD.The Mountain House CSD will condition the will serve letter to require the construction of necessary drainage facilities prior to occupancy of any structure or facility within the proposed development. Implementation Measure 15.2.3(d).All implementing storm drain projects shall comply with the applicable ` provisions of the: 1. Mountain House CSD Development Standards. 2. Mountain House Storm Water Master Plan Update and addenda. ` 3. Best Management Practices Handbook. Final Supplemental EIR for Delta College Center at Mountain House 2002 (Mitigation Measures) The following mitigation measures from the Final Supplemental EIR for Delta College Center at Mountain House are applicable to the proposed project. ► Mitigation Measure 4.7-1 (Drainage Improvements).Drainage improvements shall be designed in accordance with the MHCSD criteria,San Joaquin County Standards,and the Mountain House Master Drainage Plan.The District shall contribute to an update of the Master Drainage Plan to account for site development, and shall obtain a"will-serve"letter from MHCSD or Memorandum of Understanding(MOLT) for drainage facilities.The District shall be responsible for collecting surface runoff at the site and conveying it to adequate downstream storm drainage facilities.Because this is a new development, all drainage facilities must be properly designed and permitted by MHCSD.All drainage facilities that are to convey project site runoff from the site to connections with the facilities in Neighborhood F shall be in place before construction of the project site.If this is not feasible,temporary collection and conveyance facilities must be approved by MHCSD before construction is started on the site.The design of on-site and off-site infrastructure shall conform to all applicable design standards of MHCSD and San Joaquin County. Mitigation Measure 4.7-2(a) (NPDES Stormwater Regulations).The developer shall comply with all Phase 11 NPDES Stormwater regulations for"construction"activities as related to the project.In particular, the project grading plan shall include Drainage and Erosion-Control Plans to minimize the impacts from erosion and sedimentation during grading.This grading plan shall conform to all standards adopted by MHCSD and San Joaquin County and shall include,as a minimum,procedures such as: (1)protecting all finished graded slopes from erosion,using such techniques such as erosion-control matting and hydroseeding; College Park at Mountain House Specdic Plan III Draft EIR EDAW San Joaquin County 4.7-9 Drainage