83-012 ORD ARTICLE III SEWER USE ORDINANCE

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d) A commercial industry discharging domestic waste, but with the potential to discharge industrial or toxic waste by spillage or process revision. 25) Industrial Waste - Waste resulting from any process involved with industry, manufacturing, trade or business concerned with the development of any r_atural resource, or any mixture of the waste with water or domestic waste- water, or distinct from normal wastewater. 26) Interference - Any inhibition or disruption of the POTW treatment processes or operations which contributes to a violation of any requi.rements or limitations of the City's NPDES permit. The term also includes any prevention of sludge use or disposal by the POT4V in accordance with Section 405 of the Act (33 U.S.C. 1345) or any criteria, guidelines, or regulations developed pursuant to the Solid Waste Disposal Act (SWDA), the Clean Air Act, the Toxic Substances Control Act, or more stringent state criteria (including those contained in any state sludge management plar prepared pursuant to Title IV of SWDA applicable to the method of disposal or use employed by the POTW 27) Milligrams per liter (mg/1) - A weight-to-volume ratio equivalent to parts per million. 28) National Categorical Pretreatment Standard - Also refer- enced simply as "Pretreatment Standard", denoting any regulation containing pollution discharge limits promulgated by the EPA in accordance with Section 307 (b) and (c) of the Act (33 U. S. C. 1347) which applies to a specific cate- gory of industrial users. 29) National Pollution Discharge Elimination System (NPDES) Permit-A permit issued pursuant to Section 402 of the Act (33 U.S.C. 1342). 30) National Prohibitive Discharge Standard - Sometimes refer- enced as "Prohibitive Discharge Standard", denoting any regulation developed und.er the authority of Section 307 (b) of the Act and 40 CFR, Section 403.5. 31) Natural Outlet - Any outlet irito a water-course, ditch, lake, or other body of surface water or groundwater. 32) New Source - Any source, construction of which begins after the publication of proposed regulations prescribing a Section 307 (c) (33 U.S.C. 1317) Pretreatment Standard which will be applicable to such source, if such standard is thereafter promulgated within one hundred twenty (120) days of proposal in the Federal Register. If the standard is promulgated later than one hundred twenty (120) days after proposal, a new source will be one whose construction is begun after the date of promulgation of the standard. 33) Normal Domestic Wastewater - Wastewater other than indus- trial wastewater discharged by a person into the sanitary sewers and containing an average twenty-four (24) hour composite concentration of not more than 250 mg/1 total suspended solids and not more than 250 mg/1 BOD, 34) Overload - Any increase in flow, BOD, suspended solids, or pollutants that would upset normal operations or cause the POTW to be non-compliant with its state or federal permits. 35) Person - Any individual, partnership, co-partnership, firm, company, corporation, association, joint stock company, trust, estate, governmental entity or any other legal entity, 5