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• <br /> U, <br /> (17) Any liquid, solids, or gases which by reason of their nature or quantity are, <br /> or may be, sufficient either alone or by interaction with other substances to <br /> cause fire or explosion or be injurious in any other way to the POTW or to <br /> the operation of the POTW. At no time shall two (2) successive readings <br /> on an explosion meter, at the point of discharge into the system (or at any <br /> point in the system), be more than five (5%) per cent nor any single <br /> reading over ten (10%) per cent of the lower explosive limit (LEL) of the <br /> meter. <br /> (18) Animal guts or tissues, paunch manure, bones, hair, hides or fleshings, <br /> entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or <br /> marble dusts, metal, glass, straw, shavings, grass clippings, rags, spent <br /> grains, spent hops, waste paper, wood, plastics, gas, tar asphalt residues, <br /> residues from refining or processing of fuel or lubricating oil, mud, or <br /> glass grinding or polishing wastes. <br /> (19) Any substance which will cause the POTW to violate its NPDES and/or <br /> other disposal system permits. <br /> (20) Any wastewater, which in the opinion of the Director can cause harm <br /> either to the sewers, sewage treatment process, or equipment; have an <br /> adverse effect on the receiving stream; or can otherwise endanger life, <br /> limb, public property, or constitute a nuisance, unless allowed under <br /> special agreement by the Director (except that no special waiver shall be <br /> given from categorical pretreatment standards). <br /> (21) The contents of any tank or other vessel owned or used by any person in <br /> the business of collecting or pumping sewage, effluent, septage, or other <br /> wastewater unless said person has first obtained testing and approval as <br /> may be generally required by the City of Everett and paid all fees assessed <br /> for the privilege of said discharge. <br /> (22) Any hazardous or dangerous wastes as defined in rules published by the <br /> State of Washington (WAC 173-303) and/or in EPA rules 40 CFR Part <br /> 261. <br /> (23) Persistent pesticides and/or pesticides regulated by the Federal Insecticide <br /> Fungicide Rodenticide Act(FIFRA) <br /> (24) Any substance which may cause the POTW's effluent or treatment <br /> residues, sludges, or scums to be unsuitable for reclamation and reuse, or <br /> to interfere with the reclamation process. <br /> JL <br /> 13 <br />