A user may not discharge into the County system:
(1) waste streams with a closed cup flashpoint of less than 140°F or 60°C using the test methods specified in 40 CFR Part 261.21, and pollutants that by their nature or quantity are or may be sufficient alone or by interaction to cause a fire or explosion hazard in the County system;
(2) solids or viscous substances in quantities capable of obstructing the flow in sanitary sewers or otherwise interfering with the proper operation of the County system;
(3) garbage with particles greater than one-half inch in any dimension that has not been shredded to the degree that all particles will be carried freely under the flow conditions normally prevailing in sanitary sewers and from any garbage grinder equipped with a motor that is greater than one and one- half horsepower;
(4) free or emulsified hexane extractable materials that are not readily biodegradable:
(i) when FOG wastes are such that they could solidify at normal wastewater temperatures and contribute to sewer line clogging, skimming and grease-handling equipment overload, or treatment process interference in accordance with the following: grease interceptors and oil separators shall be installed and maintained in accordance with the County Plumbing Code and grease and oil wastes may not be discharged into the County system; and
(ii) discharges of petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that may cause interference or pass-through.
(5) wastewater having a pH lower than 6.0 or higher than 10.0 or having any other corrosive property that may be hazardous to the County system or County personnel;
(6) substances either singly or by interaction with other substances that injure or interfere with any wastewater treatment process; constitute a hazard to humans or animals; exceed the limitations set forth in applicable national categorical pretreatment standards or in the local limits; or result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health or safety problems.
(7) noxious or malodorous liquids, gases, or solids that singly or by interaction with other wastes are capable of creating a nuisance or hazard to life or are sufficient to prevent entry into the County system for its maintenance and repair;
(8) substances that may cause the County system's treatment residues, sludges, or scums to be unsuitable for reclamation and rescue or may interfere with the reclamation process;
(9) substances that if discharged into the County system will cause the County to be out of compliance with sludge use or disposal criteria, guidelines, or regulations developed under § 405 of the Act or with criteria, guidelines, or regulations affecting sludge use and disposal developed in accordance with the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act, or any State standards applicable to the sludge management method employed;
(10) substances that will cause the County to violate its NPDES permit, State discharge permit, or any applicable receiving water quality standards;
(11) substances, including dye wastes and vegetable farming solutions with objectionable color, that cannot be removed in the County system so as to cause the wastewater treatment plant effluent to fail to meet State or federal requirements;
(12) wastewater or vapor that has a temperature greater than 60°C (140°F), will inhibit biological activity in the County system's treatment works resulting in interference, or has a temperature that causes the influent at the treatment plant to exceed 40°C (104°F);
(13) a slugload;
(14) noncontact cooling water, stormwater, surface water, groundwater, roof runoff, subsurface drainage, cooling water from air conditioning units with three tons of refrigeration or larger, or unpolluted water as determined by the Director;
(15) radioactive wastes or isotopes with a half-life or concentration that exceeds the limits established by the Director in order to comply with applicable State or federal regulations;
(16) substances alone or in combination with other substances that are not amenable to biological treatment or reduction by the sewage treatment processes employed or that are amenable to treatment only if the wastewater treatment plant effluent is not able to meet the requirements of other State or federal agencies having jurisdiction over discharge to receiving waters;
(17) wastewater that exceeds the County's local limits for permissible pollutants;
(18) wastewater that can be demonstrated to cause or may cause a hazard to human life, to create a public nuisance, or to harm the County system; or
(19) any trucked or hauled pollutants except at discharge points designated by the Director.
(1985 Code, Art. 25, § 25-5-504) (Bill No. 40-85; Bill No. 66-85; Bill No. 94-92; Bill No. 63-04)