05-11-1998 Council Packet - Laserfiche WebLink

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ferjhzer management • •mod high mod-high • •no no no no eaten casin eieanmg low no no no low ’**no no no suD-grade ereparation non-Dhospr^erus fertilizers Temporary Temporary silt fence yes yes no no yes***no no no Straw bales yes yes no no yes***no no no Temporary sediment basin yes yes design speafie • •yes outlet speafie design specifie low Roex entranea pad no no ■ no no yes no no no * Natural wetlands can also contnbute nutnents '* No data to evaluate effectiveness *• Small volumes only (b) Temporary BMPs must be incorporated in all projects requiring a permit under this rule, as follows: (1) An Erosion Control Plan must be prepared by a qualified individual showing proposed methods of retaining waterborne sediments on-site during the period of construction and showing how the site will be restored, covered, or revegetated after construction; (2) The Erosion Control Plan shall be consistent with specifications of the MPCA manual “Protecting Water Quality in Urban Areas” (revised July 1991) and its future revisions; (3) Permanent detention/retention ponds, used as temporary sedimentation basins must be cleaned out after construction is complete; (4) Erosion control measures, such as silt fences and hay/straw bales shall be removed after all disturbed areas have been fully st^Mlizer*; (5) Sites with high erosion potential characterized by steep slopes or erodible soils may be subject to the provisions of section 2, paragraph (f) of this rule. 4. WATER QUANTITY CONTROL REQUIREMENTS. (a) The peak rate of stormwater runoff from the site shall not increase as a result of the proposed development. Developed peak rates of runoff shall be controlled such that the existing peak rates are not exceeded. This criteria shall be analyzed and met for runoff producing events of critical duration with return frequencies of 1,10 and 100 years in the subwatershed in which the site is located. Draft - April 29, 1998