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34 <br /> 12119196 Final Draft 15 <br /> (4) A monitoring and maintenance plan to measure success of the <br /> mitigation based on stated objectives. Include a list of parties <br /> responsible for monitoring and maintenance, a schedule for each, <br /> and how results will be reported at least twice a year to the Planning <br /> and Inspections Department; <br /> (5) A contingency plan including how the site will be protected from <br /> impacts by human and unwanted animal intrusion, alternate plant <br /> species and construction methods that could be used in the event <br /> adjustments or substitutions are needed until the mitigation area is <br /> established;and <br /> (6) A financial guarantee is required for the total cost of the mitigation <br /> project. Once the installation is complete,thirty percent(30%)of the <br /> amount of the bond,letter of credit,or escrow will be held for twelve <br /> (12)months or until the site is established,whichever is greater. <br /> 8.8.7.4 Construction <br /> a. Drainage <br /> (1) All drainage structures shall be installed and maintained according to <br /> the approved Stormwater Management Plan. <br /> (2) Golf courses that include retention/detention ponds shall comply <br /> with the requirements in Article 6.23.4, Operation and Maintenance <br /> of Structural Best Management Practices. <br /> b. Grading and Erosion Control <br /> (1) Plans for grading'and erosion control must comply with standards <br /> contained in the Orange County Erosion and Sediment Control <br /> Ordinance and Manual; <br /> (2) Whenever practical, construction shall be phased to minimize <br /> disturbance and sedimentation; <br /> (3) sediment control measures must be properly installed to filter <br /> sediment from runoff during construction and shall be maintained <br /> until grading is complete and a permanent vegetative cover has been <br /> established and all slopes stabilized;and <br />