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1~ <br />accommodated and are accessible for main tenance and removal. -- <br />Observe the requirements and standards in Orange County's Soil Erosion <br />and Sediment Control Manual. <br />C. Limit Exposed Areas <br />All land-disturbing activities are to be planned and conducted to minimize <br />the size of the area to be exposed at any one time. <br />D. Limit Time of Exposure <br />All land-disturbing activities are to be planned and conducted to limit <br />exposure to the shortest feasible time. <br />E. Control SurFace Water <br />Surface water runoff originating upgrade of exposed areas should be <br />controlled to reduce erosion and sediment Ions during the period of <br />exposure. <br />F. Control Sedimentation <br />All land-disturbing activities are to be planned and conducted so as to <br />prevent off-site sedimentation damage. <br />G. Manage Stormwater Runoff <br />When the increase in the peak rates and velocity of storm water runoff <br />resulting from aland-disturbing activity is sufficient to cause accelerated erosion <br />of the receiving watercourse, plans are to include measures to control the <br />velocity and the rate of release at the point of discharge so as to minimize <br />accelerated erosion of the site and increased sedimentation of the stream. <br />section s Mandatory Design and Performance Standards for <br />Land-Disturbing Activity <br />No land-disturbing activity subject to the control of this Ordinance shall be <br />undertaken except in accordance with the following mandatory standards: <br />A. Buffer Zone <br />1. No land-disturbing activity during periods of construction. or improvement <br />to land shall be permitted in proximity to a lake or natural watercourse <br />unless a buffer zone is provided along the margin of the watercourse of <br />sufficient width to confine visible siltation within the twenty- five percent <br />(25%) of the buffer zone nearest the land-disturbing activity. Waters that <br />have been classified as trout waters by the Environmental Management <br />Commission shall have an undisturbed buffer zone 25 feet wide or of <br />sufficient width to canine visible siltation within the twenty-five percent <br />(25%) of the buffer zone nearest the land-disturbing activity, whichever is <br />greater. Provided, however, that the County may approve plans which <br />