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(a) The permittee and the owner shall make adequate provisions to prevent any surface waters from damaging the face of any excavation or fill. All slopes shall be protected from surface water runoff from above by berms, swales or brow ditches unless the County Official determines such berms, swales or brow ditches are unnecessary to provide such protection and waives this requirement.
(b) Where grading operations are to be conducted for any time during the period from November 11 through April 30, the County Official may require the incorporation of additional erosion control measures, including but not limited to the application of geotextile fabrics, erosion control blankets, particularly if slope plantings required by Section 87.418 have not become established.
(c) If any part of grading work on any site is ceased for any reason for a period in excess of 10 calendar days or prior to the onset of precipitation (50% chance of ½ inch or more of rain), the County Official requires that additional stormwater measures be implemented to disturbed soil areas, as required by Section 67.811, in order to prevent damage such as erosion or sedimentation to the site, slopes, adjoining properties, public rights of way or watercourses.
(d) The active disturbed soil area of a project site shall be no more than 50 acres for an individual grading permit/improvement plan or combination of grading permits under associated Tentative or Final Map (i.e. TM XXXX-1 through 3), unless otherwise approved by the County Official. 125% of the required Stormwater BMP materials shall be maintained on site to protect the disturbed soil area.
(Added by Ord. No. 9547 (N.S.), effective 5-9-03; amended by Ord. No. 9926 (N.S.), effective 4-11-08)