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F. Site Erosion Control. The following <br />criteria apply only to construction activities that result in <br />runoff leaving the site. <br />1. Channelized runoff from adjacent <br />areas passing through the site shall be diverted around <br />disturbed areas, if practical. Otherwise, the channel shall <br />be protected as described below. Sheet flow runoff from <br />adjacent areas greater than 10,000 square feet in area shall <br />also be diverted around disturbed areas, unless shown to have <br />resultant runoff rates of less than 0.5 cubic feet per second <br />across the disturbed area for the one year storm. Diverted <br />runoff shall be conveyed in a manner that will not erode the <br />conveyance and receiving channels. <br />2. All activities on the site shall be <br />conducted in a logical sequence to minimize the area of bare <br />soil exposed at any one time. <br />3. Runoff from the entire disturbed area <br />on the site shall be controlled by meeting either subsections <br />a. and b. ora. and c. <br />a. All disturbed ground left <br />inactive for fourteen or more days shall be stabilized by <br />seeding or sodding (only available prior to September 15) or <br />by mulching or covering or other equivalent control measure. <br />b. For sites with more than ten <br />acres disturbed at one time, or if a channel originates in the <br />disturbed area, one or more temporary or permanent <br />sedimentation basins shall be constructed. Each sedimentation <br />basin shall have a surface area of at least 1 percent of the <br />area draining to the basin and at least three feet of depth <br />and constructed in accordance with accepted design <br />specifications. Sediment shall be removed to maintain a depth <br />of three feet. The basin discharge rate shall also be <br />sufficiently low as to not cause erosion along the discharge <br />channel or the receiving water. <br />c. For sites with less than ten <br />acres disturbed at one time, silt fences, straw bales, or <br />equivalent control measures shall be placed along all <br />sideslope and downslope sides of the site. If a channel or <br />area of concentrated runoff pisses through the site, silt <br />fences shall be placed along the channel edges to reduce <br />sediment reaching the channel. The use of silt fences, straw <br />bales, or equivalent control measures must include a <br />maintenance and inspection schedule. <br />8 <br />u