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(29) "Garbage" means the residue from the preparation and dispensing of food, and from the <br />handling, storage and sale of produce. <br />(30) "Government user" means any user discharging wastewater from premises utilized by <br />public political units, including Federal, State, County and City units. <br />(31) "Grab sample" means a sample which is taken from a waste stream on a one-time basis <br />with no regard to the flow in the waste stream and without consideration of time. <br />(32) "Grease and oil" means a group of substances including hydrocarbons, fatty acids, soaps, <br />fats, waxes, oils or any other material that is extracted by a solvent from an acidified sample and <br />that is not volatilized during the laboratory test procedures. Greases and oils are defined by the <br />method of their determination in accordance with Standard Methods as explained in subsection <br />(83) hereof. <br />(33) "Grease and oil of animal and vegetable origin" means substances that are of a less <br />readily biodegradable nature such as are discharged by meatpacking, vegetable oil and fat <br />industries, food processors, canneries and restaurants. <br />(34) "Grease and oil of mineral origin" means substances that are less readily biodegradable <br />than grease and oil of animal or vegetable origin, and are derived from a petroleum source. Such <br />substances include machinery lubricating oils, gasoline station wastes, petroleum refinery wastes <br />and storage depot wastes. <br />(35) "Ground garbage" means the residue from the preparation, cooking and dispensing of <br />food that has been shredded to such a degree that all particles will be carried freely in suspension <br />under the flow conditions normally prevailing in public sewers with no particle greater than one- <br />half inch in any dimension. <br />(36) "Incompatible pollutant" means any pollutant which is not a compatible pollutant as <br />defined in subsection (19) hereof. <br />(37) "Industrial user" means a person who discharges to the City's wastewater disposal system <br />liquid, solid or gaseous wastes resulting from the processes employed in industrial or <br />manufacturing activities, or from the development, recovering or processing of any natural <br />source. <br />(38) "Industrial waste" means any liquid, solid or gaseous substance or form of energy, or <br />combination thereof, resulting from any process of industrial, commercial, governmental and <br />institutional concerns, manufacturing, business, trade or research, including the development, <br />recovery or processing of natural resources, or from sources other than those generating waste as <br />defined in subsection (49) hereof. <br />(39) "Industrial waste permit" means a formal permit to deposit or discharge industrial waste <br />into any sanitary sewer, as issued by the City. <br />(40) "Influent" means the water, together with any waste that may be present, flowing into a <br />drain, sewer, receptacle or outlet and then to the sewage treatment plant. <br />(41) "Institutional user" means any person discharging wastewater from premises serving <br />educational, social or eleemosynary purposes, including, but not limited to, private schools, <br />hospitals, nursing homes and charitable organizations. <br />(42) "Interference" means inhibition or disruption of the sewage treatment processes or <br />operations which contributes to a violation of any requirements of the City's NPDES <br />permit. The term includes prevention of sewage sludge use or disposal by the treatment plant in <br />accordance with Section 405 of the Act (33 U.S.C. 1345) or any criteria, guidelines or <br />regulations developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic <br />Substance Control Act or more stringent State criteria, including those contained in any State <br />