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B. The sound walls shall be constructed consistent with the MHCSD Design Manual, the Master Plan and as shown on the preliminary sound wall plans, unless otherwise determined by the MHCSD General Manager. C. The developers shall dedicate the necessary WW'to widen Grant Lin_ a Road to'its ultimate width and construct the noise barrier at its ultimate location as specified by the General Manager of the MRCS© D. Except when the MHCSD General Manager specifies otherwise,when a sound'wall is installed on an arterial street, the adjacent street edge landscaping, sidewalk, and street curb&gutter shall also be installed. E. All walls shall comply with Master Plan Policy Section 4.2.7. F. The 15 feet of retaining wall located within the easement between lots 47 and 50 is not allowed. Permanent structures, including fences,within the easement are prohibited. 22. Best Management Practices: A. To control erosion and sedimentation during project construction and operation, the developer shall comply with MHMP policies, MHMP mitigation measures,and Phase and 11 NPDES permit requirements, including the preparation and implementation of a SWPPP that outlines BMPs to be followed to minimize erosion and sedimentation during project construction and operation. B. All non-residential (Le. Office, Industrial, Commercial, Neighborhood Commercial etc), uses must perforin a pretreatment of all storm flows before the flows enter a public storm system. The design shall be in accordance with the Storm Water Master Plan Update and NPDES requirements. The MHCSD shall review and approve the plans and the specifications for the storm pretreatment prior to issuance of the building permit. _ C. The applicant shall construct catch basin filters and/or other source control Best Management Practices (BMPs)for urban runoff from Tract 3646 as determined by the MHCSD. D. Construction-Related Erosion: The applicant and/or contractor shall comply with applicable NPDES General Construction Activities Storm Water Permit requirements established by the Clean Water Act. Pursuant to the NPDES Storm Water Program, an application for coverage under the statewide General Construction Activities Storm Water Permit(General Permit)shall be obtained for project development prior to the issuance of grading permits. The applicant and/or contractor shall obtain coverage under the General Permit by filing a Notice of Intent with the State Water Resource Control Board's (SWRCB)Division of Water Quality. The filing shall describe erosion control and storm water treatment measures to be implemented during and following construction and provide a schedule for monitoring performance. MHCSD approved BMPs shall serve to control point and non-point source pollutants in storm water and shall constitute the project's storm water pollution prevention program (SWPPP)for construction activities. Timing: All applicable permits shall be obtained prior to the issuance of grading permits for Tract 3646. 23. Storm Drains: A_ The developer shall fund, design and construct the required storm drainage system in accordance with the requirements of the Storm Water Master flan Update and the MHCSD's Standards and Specifications to serve Tract 3646 unless otherwise required or approved by the General Manager of the MHCSD. � a 22 i .