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<br />8.4 <br /> <br />Jmckin~. Each site shall have graveled roads, access drives and parking areas 01 :illllicknt <br />width and length to prevent sediment from being tracked onto public or private roadways. <br />Any sediment reaching a public or private road shall be removed by street cleaning (not <br />llllshing) before the end of each workday. <br /> <br />. <br /> <br />8.5 Drain inlet protection. All storm drain inlets shall be protected during constructi,m until <br />control measures are in place with a straw bale, silt fence or equivalent barrier meeting <br />accepted design criteria, standards and specifications contained in the MPCA puhlication <br />"Protecting Water Quality in Urban Areas." <br /> <br />8.6 Site erosion control. The following criteria (a. through d.) apply only to construction <br />activities that result in runoff leaving the site. <br /> <br />a) Channelized runoff from adjacent areas passing through the site shall be diverted <br />around disturbed areas, if practical. Otherwise, the channel shall be protected as <br />described below. Sheetflow runoff from adjacent areas greater than 10,000 square feet <br />in area shall also be diverted around disturbed areas, unless shown to have resultant <br />runoff rates of less than 0.5 ft.3/sec. across the disturbed area for the one year storm. <br />Diverted runoff shall be conveyed in a manner that will not erode the conveyance and <br />receiving channels. <br /> <br />b) All activities on the site shall be conducted in a logical sequence to minimi~e the area <br />of bare soil exposed at any one time. <br /> <br />c) <br /> <br />Runoff from the entire disturbed area on the site shall be controlled by meeting either <br />subsections 1 and 2 or 1 and 3. <br /> <br />. <br /> <br />1) All disturbed ground left inactive for fourteen or more days shall be stahilized by <br />seeding or sodding (only available prior to September 15) or by mulching or <br />covering or other equivalent control measure. <br /> <br />2) For sites with more than tcn acres disturbed at one time, or if a channel, II iginates <br />in the disturbed area, one or more temporary or permanent sedimentation basins <br />shall be constructed. Each sedimentation basin shall have a surface area of at <br />least one percent of the area draining to the basin and at least three feet of depth <br />and constructed in accordance with accepted design specifications. Sediment shall <br />be removed to maintain a depth of three feet. The basin discharge rate shall also <br />be sufficiently low as to not cause erosion along the discharge channel or thc <br />receiving water. <br /> <br />3) For sites with less than ten acres disturbed at one time, silt fences, straw balcs, or <br />equivalent control measures shall be placed along all sideslope and downslope <br />sides of the site. If a channel or area of concentrated runoff passes through the <br />site, silt fences shall be placed along the channel edges to reduce sediment <br />reaching the channel. The use of silt fences, straw bales, or equivalent control <br />measures must include a maintenance and inspection schedule. <br /> <br />. <br /> <br />d) Any soil or dirt storage piles containing more than ten cubic yards of material should <br />not be located with a downslope drainage length of less than 25 feet from the toe of <br />the pile to a roadway or drainage channel. If remaining for more than seven days, they <br />shall be stabilized by mulching, vegetative cover, tarps or other means. Erosion from <br />piles which will be in existence for less than seven days shall be controlled hy placing <br />straw bales or silt fence barriers around the pile. In-street utility repair or cOl\struction <br />soil or dirt storage piles located closer than 25 feet of a roadway or drainage channel <br />must be covered with tarps or suitable alternative control, if exposed for more than <br />