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along slopes. Silt fences are required along channel edges to reduce sediment reaching channel. Silt fences, rock check dams, etc. must be regularly inspected and maintained. H.) Sediment basins related to impervious surface area. Where a project's ultimate development replaces surface vegetation with one or more acres of cumulative impervious surface, and all runoff has not been accounted for in a local unit of government's existing storm water management plan or practice, the runoff must be discharged to a wet sedimentation basin prior to entering waters of the state. l .) Work must conform with the current version of the Minnesota Pollution Control Agency's "Protecting Water Quality in Urban Areas," and the current requirements found in the same agency's NPDES permits for storm water associated with construction activities. I.) Generally, sufficient silt fence will be required to hold all sheet flow runoff generated at an individual site, until it can either infiltrate or seep through silt fence's pores. J.) Temporary stockpiling of fifty (50) or more cubic yards of excess soil on any lot or other vacant area will not be allowed without issuance of a grading permit for the earth moving ` activity in question. K.) For soil stockpiles greater than ten (10) cubic yards the toe of the pile must be more than twenty-five (25) feet from a road, drainage channel or storm water inlet. If left for more than seven (7) days, they must be stabilized with mulch, vegetation, tarps or other other means. If left for less than seven (7) days, erosion from stockpiles must be controlled with silt fences or rock check dams. l .) If for any reason a soil stockpile of any size is located closer than twenty-five (25) feet from a road, drainage channel or storm water inlet, and left for more than seven (7) days, it must be covered with tarps or controlled in some other manner L.) Temporary rock construction entrances are required wherever vehicles enter and exit a site. M.) Parking is prohibited on all bare lots and all temporary construction entrances, except where street parking is not available. Gravel entrances are to be used for deliveries only as per the development contract. N.) Streets must be cleaned and swept whenever tracking of sediments occurs and before sites are left idle for weekends and holidays. Establishment of a regular sweeping schedule is encouraged. O.) Water, impacted by the construction activity, that is being removed from the site by 11