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Stantec
<br />CITY OF ELK RIVER -STORM WATER UTILITY
<br />Appendix C
<br />June 25, 2012
<br />"Best Management Practices" or `BMPs" means practices to prevent or reduce the pollution
<br />of the waters of the state, including schedules of activities, prohibitions of practices, and other
<br />management practices, an also includes treatment requirements, operating procedures and
<br />practices to control plant site runoff, spillage or leaks, sludge, or waste disposal or drainage from
<br />raw material storage. (Minn. R. 7001.1020, subp.5.)
<br />"Green Infrastructure" means a wide array of practices at multiple scales that manage wet
<br />weather and that maintains and restores natural hydrology by infiltrating, evapotranspiring, and
<br />harvesting and using stormwater. ON a regional scale, green infrastn~cture is the preservation
<br />and restoration of natural landscape features, such as forests, floodplains and wetlands, coupled
<br />with policies such as infill and redevelopment that reduce overall imperviousness in watershed.
<br />On the local scale, green infrastnicture consists of site and neighborhood-specific practices, such
<br />as bioretention, trees, green roofs, permeable pavements and cisterns.
<br />"Illicit Discharge" means any discharge to a municipal separate storm sewer that is not
<br />composed entirely of storm water except discharges pursuant to NPDES permit (other than the
<br />NPDES permit for discharge from the municipal separate storm sewer) and discharge resulting
<br />from firefighting activities (40 CFR 122.26 (b)(2))
<br />"Impaired Water" mean waters identified as impaired by the Agency, and approved by the
<br />USEPA, pursuant to section 303(d) of the Clean Water Act (33.U.S.C. 303(d)).
<br />"Maximum Extent Practicable" or "MEP" means the statutory standard (33 U.S>C> 1342
<br />(p)(3)(B)(iii)) that establishes the level of pollutant reduction that an Owner or Operator of
<br />Regulated MS4s much achieve. The USEPA has intentionally not provided a precise definition
<br />of MEP to allow maximum flexibility in MS4 permitting. The pollutant reductions that
<br />represent MEP may be different for each small MS4, given the unique local hydrologic and
<br />geologic concerls that may exist and the differing possible pollutant control strategies.
<br />Therefore, each permittee will determine appropriate BMPs to satisfy each of the six Minimum
<br />Control Measures (MCMs) through and evaluative process. The USEPA envisions application
<br />of the MEP standard as an iterative process.
<br />"Municipal separate storm sewer system" or "MS4" means a conveyance or system of
<br />conveyances including roads with drainage systems, municipal streets, catch basins, curbs,
<br />gutters, ditches, man-made channels, or storm drains:
<br />Owned or operated by a state, city ,town, county, district, association, or other
<br />public body, created by or pursuant to state law, having jurisdiction over
<br />disposal of sewage, industrial wastes, stormwater, or other wastes, ulcludulg
<br />special districts under state law such as a sewer district, flood control district,
<br />or drainage district or sunilar entity, or an Indian tribe or an authorized Indian
<br />tribe organization, or a designated and approved management Agency under
<br />Project No. 193802143 6.33
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