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? <br />? <br />(73) "Sewage treatment plant" means an assemblage of devices, <br />struckures, and equipment for treatment of sewage and <br />industrial waste. <br />(74) "Sewerage" means the system of sewers and appurtenances for <br />the collection, transportation, and pumping of sewage and <br />industrial waste. <br />(75) "Sewer service charge" is imposed upon all users receiving <br />services from the City's sewage disposal system in a total <br />amount sufficient to pay the costs of the system. Sewer <br />service charges consist of a capital charge, a user charge, <br />and a surcharge. <br />(76) "Shall, may." "Shall" is mandatory; "may" is permissible. <br />(77) "Storm sewer" or "storm drain" means a public sewer and <br />public ditch which carries storm, surface, and groundwater <br />drainage, but excludes sewage and industrial wastes. <br />(78) "Stormwater runoff" means that portion of rainfall that is <br />drained into the sewers. <br />(79) "Sludge" is any solid, semi-solid, or liquid waste generated <br />by a municipal, commercial, or industrial wastewater treat- <br />ment plant, water supply treatment plant, or air pollution <br />control facility or any other waste having similar charac- <br />teristics and effects as defined in standards issued under <br />Section 402, 405 of the Act and in the applicable require- <br />ments under Sections 3001, 3004, and 4004 of the Solid Waste <br />Disposal Act (PL 94-580). <br />(80) "Slug" means any discharge of water, sewage, or industrial <br />waste which, in concentration of any given constituent or in <br />quantity of flow, exceeds for any period of longer duration <br />than fifteen minutes more than five times its average hourly <br />concentration or flow. <br />(81) "Standard Industrial Classification (SIC)" system classifies <br />industries pursuant to the Standard Industrial Classification <br />Manual issued by the Executive Office of the President, <br />Office of Management an8 Budget, 1972, assigning a code (SIC <br />Code) denoting the manufacturing process. <br />(82) "StanBard Methods" refers to the laboratory procedures set <br />forth in the most recent edition of Stanc3ard Methods for the <br />Examination of Water, Sewage, and Industrial Wastes, pub- <br />lished jointly by the American Public Health Association, the <br />American Water Works Association, and the Federation of Sew- <br />age and Industrial Wastes Associations. <br />-10-