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4) Concentrated stormwater, conveyed by ditches, channels, <br />pipes, swales or other conveyance systems must be dispersed <br />and diffuse flow reestablished prior to discharge into a stream <br />buffer; <br />5) Nitrogen load contribution must be held to 3.6 Ibs per acre per <br />year. <br />f) Drainage <br />1) All drainage structures will be installed and maintained <br />according to the approved Stormwater Management Plan. <br />2) Subdivisions that include retention /detention ponds shall <br />comply with the requirements in Section 6.23.4, Operation and <br />Maintenance of Structural Best Management Practices. <br />g) Grading and Erosion Control <br />1) Plans for grading and erosion control comply with standards <br />contained in the Orange County Erosion and Sediment Control <br />Ordinance and Manual; <br />2) Construction is phased to the extent practical to minimize <br />disturbance and sedimentation; <br />3) Sediment control measures will be properly installed to filter <br />sediment from runoff during construction and maintained until <br />grading is complete and a permanent vegetative cover has <br />been established and all slopes stabilized; and <br />4) Permanent landscaping, groundcover, mulch, etc. will be <br />installed as soon as practical after construction activities for <br />each phase are completed. <br />h) Solid Waste Management <br />A solid waste management plan, submitted as part of the Resources <br />Management Plan, shall include the method(s) of disposal and <br />recycling of construction debris. <br />i) Irrigation <br />1) Irrigation systems for the subdivision and the lots in the <br />subdivision are designed and can be operated according to a <br />water conservation plan described in the Resources <br />Management Plan submitted with the application; <br />2) The Resources Management Plan shall identify the source(s) <br />of water to be used for irrigation, the volume available for that <br />purpose, and expected consumption rates. The system design <br />and plan for operation will be evaluated based on efficiency; <br />and <br />8-44 <br />