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Subd.9 Maximum Extent Practicable (MEP). A standard for water quality that <br />applies to all MS4 operators regulated under the NPDES program. Since no precise <br />definition of MEP exists, it allows for maximum flexibility on the part of MS4 operators <br />as they develop and implement their programs to reduce the discharge of pollutants to the <br />maximum extent practicable, including management practices, control techniques and <br />system, design and engineering methods, and such other provisions as the Administrator <br />or the State determines appropriate for the control of pollutants. <br />Subd10 MPCA. The Minnesota Pollution Control Agency. <br />Subd.11 Municipal Se�arate Storm Sewer Svstem (MS4). The system of conveyances <br />(including sidewalks, roads with drainage systems, municipal streets, catch basins, curbs, <br />gutters, ditches, channels, or storm drains) owned and operated by the City and designed <br />or used for collecting or conveying storm water, and which is not used for collecting or <br />conveying sewage. <br />Subd.12 National Pollutant Dischar�e Elimination System PDES) Storm Water <br />Discharge Permit. A permit issued by the Minnesota Pollution Control Agency (MPCA) <br />that authorizes the discharge of pollutants to waters of the United States, whether the <br />permit is applicable on an individual, group, or general area-wide basis. <br />Subd.13 Non-Storm Water Discharge. Any discharge to the storm drain system that is <br />not composed entirely of storm water. <br />Subd.14 Person. Any individual, association, organization, partnership, firm, <br />corporation or other entity recognized by law and acting as either the owner or as the <br />owner's agent. <br />Subd.15 Pollutant. Any substance which, when discharged has potential to or does any <br />of the following: <br />A. Interferes with state designated water uses; <br />B. Obstructs or causes damage to waters of the state; <br />C. Changes water color, odor, or usability as a drinking water source through causes <br />not attributable to natural stream processes affecting surface water or subsurface <br />processes affecting groundwater; <br />D. Adds an unnatural surface film on the water; <br />E. Adversely changes other chemical, biological, thermal, or physical condition, in <br />any surface water or stream channel; <br />F. Degrades the quality of groundwater; or <br />G. Harms huxnan life, aquatic life, or terrestrial plant and wildlife; A Pollutant <br />includes but is not limited to dredged soil, solid waste, incinerator residue, <br />garbage, wastewater sludge, chemical waste, biological materials, radioactive <br />materials, rock, sand, dust, industrial waste, sediment, nutrients, toxic substance, <br />1600-3 <br />