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"Material Storage Facilities" means an uncovered area where bulk materials (liquid, solid, <br />granular, etc.) are stored in piles, barrels, tanks, bins, crates, or other means. <br />"Maximum Extent Practicable" refers to paragraph 402(p)(3)(B)(iii) of the federal Clean Water <br />Act, which reads as follows: "Permits for discharges from municipal storm sewers shall <br />require controls to reduce the discharge of pollutants to the maximum extent practicable, <br />including management practices, control techniques, and system, design, and engineering <br />methods, and other such provisions as the Administrator or the State determines appropriate <br />for the control of such pollutants." <br />"MEP" means Maximum Extent Practicable. <br />"Moderate ADT Roadways and Parkin Areas" are urban roads with ADT between 7,500 and <br />30,000 vehicles per day; rural roads and freeways with ADT between 15,000 and 30,000 <br />vehicles per day; and parking areas with between 40 and 100 trip ends per 1,000 SF of gross <br />building area or between 100 and 300 total trip ends per day are considered to be moderate - <br />use traffic areas. Examples include visitor parking for small to medium commercial buildings <br />with a limited number of daily customers. Urban roads are located within designated Urban <br />Growth Management Areas; rural roads are located outside designated Urban Growth <br />'_Management Areas. Freeways, defined as fully controlled and partially controlled limited <br />access highways, may be located either inside or outside of Urban Growth Management <br />Areas. <br />"Moderate -Use Sites" include moderate ADT roadways and parking areas (see definition above); <br />primary access points for high-density residential apartments; most intersections controlled <br />by traffic signals; and transit center bus stops. These sites are expected to generate sufficient <br />concentrations of metals that additional runoff treatment is needed to protect water quality in <br />non-exempt surface waters. <br />"MS4" means Municipal Separate Storm Sewer System. <br />"Municipal Separate Storm Sewer" means a conveyance, or system of conveyances (including <br />roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, <br />manmade channels, or storm drains): <br />(i) owned or operated by a state, city, town, borough, county, parish, district, <br />association, or other public body (created by or pursuant to State Law) having <br />jurisdiction over disposal of wastes, storm water, or other wastes, including <br />special districts under State Law such as a sewer district, flood control district or <br />drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal <br />organization, or a designated and approved management agency under section <br />208 of the CWA that discharges to waters of Washington State; <br />(ii) designed or used for collecting or conveying stormwater; <br />(iii) which is not a combined sewer; and <br />(iv) which is not part of a Publicly Owned Treatment Works (POTW) as defined at 40 <br />CFR 122.2. <br />(v) which is defined as "large" or "medium" or "small" or otherwise designated by <br />Ecology pursuant to 40 CFR 122.26. <br />Eastern Washington Phase HMunicipal Stormwater Permit —August 1, 2014 <br />Page 53 <br />