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processing of fuel or lubricating oil, mud or glass griding or polishing wastes. C. Any wastewater having a pH of less than 5.0 or greater than 9.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the wastewater disposal system. D. Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to inhibit or disrupt any wastewater treatment process, constitute a hazard to humans or animals, or create a toxic effect in the receiving waters of the wastewater disposal system. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to Section 307(a) of the Act. 4. The following described substances, materials, water or wastes shall be limited to discharges to municipal system to concentrations or quantities which will not harm either sewers, the wastewater treatment works treatment process or equipment, will not have an adverse effect on the receiving stream and/or soil, vegetation and ground water, or will not otherwise endanger lives, limb, public property, or constitute a nuisance. The Public Works Supervisor may set limitations lower than limitations established in the regulations below if, in his •� opinion, such more severe limitations are necessary to meet the above objectives. In forming his opinion as to the acceptability of wastes, the Public Works Supervisor will give consideration to such factors as the quantity of subject waste in reaction to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, the City's NPDES and/or SDS permit, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the Public Works Supervisor are as follows: A. Any wastewater having a temperature greater than 150 degrees F (65.5 degrees C), or causing, individually or in combination with other wastewater, the influent at the wastewater treatment plant to have a temperature exceeding 105 degrees F (40 degrees C), or having heat in amounts which will inhibit biological activity in the wastewater treatment works resulting in interference therein. B. Any wastewater containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/1 or containing substances which may solidify or become viscous at temperatures between 32 degrees F and 150 degrees F (0 degrees C and 65.5 degrees C); and