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47. HYDROLOGIC AND HYDRAULIC CALCULATIONS: The applicant's California licensed civil engineer shall submit a detailed hydrologic and hydraulic study for the design storm event as provided for in the City's Design Guide dated 1984 with the first submittal of the improvement plans to the Engineering Department subject to the review and approval of the Director of Engineering/City Engineer. 48. IMPROVEMENT PLANS: The applicant's California licensed civil engineer shall prepare improvement plans that include the plan and profile of all proposed streets; typical and special cross sections; existing and proposed sanitary sewer storm drain, and water improvements; grading; curb ramps, sidewalk, and driveways; subdrains; fire hydrants; street lights; repair or replacement of deficient frontage improvements; construction of frontage improvements; flood zone limits; seismic fault zone limits; existing and proposed easements; existing and proposed lot lines: storm water pollution control plan; storm water management plan; and other details as determined by the Director of Engineering/City Engineer. 49. DUST CONTROL PLAN: The applicant shall submit a written dust control plan or procedure with the first submittal of the grading and improvement plans to the Engineering Department subject to the review and approval of the Director of Engineering/City Engineer. 50. SUBDRAINS: The curb and gutter along the proposed public and private streets shall have a subdrain installed at either the back of the curb or lip of gutter in compliance with the City Standard Specifications and Details in effect at the time of issuance of the encroachment, grading, or subdivision permit, whichever occurs first. Sub-drains shall be connected to the storm drain system or drained by other means acceptable to the Director of Engineering/City Engineer. 51. EXISTING DRAINAGE SWALES: All existing drainage swales proposed to be filled shall have subdrains installed unless otherwise approved by the applicant's California licensed geotechnical engineer and the Director of Engineering/City Engineer. All subdrains shall have cleanouts installed at the upstream end of the pipe and shall terminate in a storm drain or other storm drain outfall, subject to the review and approval of the Director of Engineering/City Engineer and prior to City Council acceptance of the public improvements. The homeowner shall be responsible to relocate a subdrain, if the subdrain encountered during the excavation of a pool or other subsurface structure. All homeowners within the subdivision shall receive notice of the presence of these subdrains and the requirement shall be included in the CC&Rs or Maintenance Agreement, whichever applies, subject to the review and approval of the City Attorney. All subdrains shall be depicted on the as-built plans. 52. EROSION CONTROL MEASURES FOR SUBDIVISIONS: The applicant shall submit an erosion control plan designed by a certified Qualified SWPPP (Stormwater Pollution Prevention Plan) Practitioner (QSP) for all projects disturbing 1 acre or more or by a California licensed civil engineer or California licensed landscape architect for all projects disturbing less than 1 acre of land, subject to the review and approval of the Director of Engineering/City Engineer. All cut and fill slopes shall be hydromulched/hydroseeded and stabilized immediately after the completion of grading work and in no case later than October 1, unless otherwise approved by the Director of Engineering/City Engineer. No grading shall occur between October 1 and April 30 unless erosion control measures are in place, subject to the review and approval of the Director of Engineering/City Engineer. Such measures shall be maintained until the permanent landscaping is completed to the satisfaction of the Director of Engineering/City Engineer and the Notice of Termination for the coverage under the Construction General Permit, if applicable, is approved by the California State Water Resources Board. PUD-133 City Council Page 9 of 18