83-012 ORD ARTICLE III SEWER USE ORDINANCE

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47) Significant Industrial L'ser - Any industrial user of the City POTW who: a) discharges 25,000 gallons or more per day, or b) discharges a flow greater than 50 of the total daily flow in the city's wastewater treatment facility, or c) discharges in his waste toxic pollutants as defined pursuant to Section 307 of the Act of state of Texas statutes and rules, or d) is found by the City, Texas Department of Water Resources or the Environmental Protection Agency to have significant impact, either singly or in combination with other contributing industries, on the wastewater treatment system, the quality of sludge, the system effluent quality, or air emissions generated by the system, or e) any user holding or requiring a wastewater contribution permit. 48) Slug - Any discharge of wastewater or industrial waste which in the concentration of any given constituent or in quantity of flow, exceeds for any period of duration longer than fifteen (15) minutes more than five (5) times the average twenty-four (24) hour concentration of flows during normal operation. 49) Standard Industrial Classification (SIC) - A classification pursuant to the Standard Industrial Classification Manual issued by the Executive Office of the President, Office of Nanagement and Budget, 1972. 50) Standard Methods - Z'he examination and analytical proce- dures set forth in the fifteenth edition, of Standard Methods for the Examination of Water and Wastewater as prepared, approved and pu lished jointly by the American Public Health Association, the American Water Works Association and the Water Pollution Control Federation and the supplement to this document titled Selected Analytical Methods Previewed and Cited by the U.S. EPA. 51) Storm Sewer - A public sewer assigned to carry storm and surface waters and drainage, into which domestic wastewa- ter and industrial wastes are not intentionally discharged. 52) Storm Water - Flow resulting from and occurring during or following natural precipitation. 53) Superintendent- See Environmental Services Superintendent. 54) Suspended 5olids - The words "suspended solids" shall mean total suspended matter that either floats on the sur- face or is in suspension in water or wastewater and that is removable by laboratory filtering (as described in Standard Methods for the Examination of Water and Waste waters, current edition or Guidelines for Establishing Test Procedures for the Anal sis of Pollutants, contained in 40 CFR 136, as published in the Federal Register and referred to as nonfilterable residue) also called total suspended solids or TSS. 55) Toxic Pollutant - Any pollutant or combination of pollutants listed as toxic in regulations promulgated by the Adminis- trator of the EPA under the provision of CWA Section 307 (a) or other acts. 56) Trap - A device designed to skim, settle or otherwise remove oil, grease, sand, flammable wastes or other harmful substances. 7