(A) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff or subsurface drainage into any sanitary sewer.
(B) Storm water and all other unpolluted drainage may be discharged through existing structures to the sewers as are specifically designated as combined sewers or storm sewers. No additional flow shall be introduced. Industrial cooling waters or unpolluted process waters may be discharged, on approval of application, as provided in § 5-1-3-1.
(C) No person shall discharge or cause to be discharged to any City sewer wastewater or pollutants which cause, threaten to cause or are capable of causing, either alone or by interaction with other substances:
(1) Fire or explosion hazard;
(2) Corrosive structural damage to the POTW but in no case water with a pH lower than 5.0 or higher than 12.0;
(3) Obstruction to the flow in City sewers or other interference with the proper operation of either the City of Lawrence POTW or the City of Indianapolis’ POTW;
(4) An interference;
(5) A pass-through;
(6) Oils, greases, fats, acids, chemicals, iron, mineral wastes, ashes or cinders, garbage (except garbage from domestic garbage disposal units), dead animals, rags, hair or any other wastes, solid, liquid or gaseous, which may cause clogging or which may be injurious to the operation and maintenance of the sewage collection system and/or treatment works;
(7) Sewage from septic tank cleaners; and/or
(8) Sewage from any floor pit or other drain at any business or commercial building, which drain receives oil, grease, sand or gasoline, except where grease, oil and sand interceptors have been provided and when, in the opinion of the Director, they have proved satisfactory for the handling of sewage with the ingredients. The interceptors shall be installed by the owner at the owner’s expense and shall be in continuous, efficient operation at all times.
(D) No person shall discharge or cause to be discharged to any City sewer:
(1) A slug or a flow rate and/or pollutant discharge rate which is excessive over a relatively short time period so as to cause a treatment process upset and subsequent loss of treatment efficiency;
(2) Heat in amounts which will inhibit biological activity at any subsequent wastewater treatment plant but in no case greater than 60°C (140°F), or heat in quantities so that the temperature at the wastewater treatment plant exceeds 40°C (104°F);
(3) Any wastewater containing toxic pollutants or any discharge which could result in toxic gases, fumes or vapors in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the City of Indianapolis’ POTW or to exceed applicable categorical pretreatment standards;
(4) A wastewater with a closed cup flash point of less than 140°F or any liquids, solids or gases which, by reason of their nature or quantity, are or may be sufficient, either alone or by interaction with other substances, to cause fire or explosion or be injurious or hazardous in any other way to either a POTW or to the operation of the City of Indianapolis’ wastewater treatment plant. At no time shall a discharge cause a reading on a meter capable of reading L.E.L. (lower explosive limit) to be greater than 10% at the point of discharge or at any other point in the City’s POTW;
(5) Any noxious or malodorous liquids, gases or solids which either singly or by interaction with other wastes are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair;
(6) Solid or viscous substances and/or other pollutants which may cause obstruction to the flow in a sewer or other interference with the operation of the City of Lawrence POTW such as, but not limited to, grease, improperly shredded garbage, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, wastepaper, wood, plastics, tar, asphalt residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes, or tumbling and deburring stones;
(7) Any substance which may cause the City’s POTW’s effluent or any other product of the wastewater works such as residues, sludges or scums to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case shall a substance discharged to the City’s POTW cause the City’s POTW to be in noncompliance with sewage disposal criteria, guidelines or regulations developed under § 405 of the Act;
(8) Any substance which will cause either the City to violate its agreement with the City of Indianapolis for treatment and disposal of wastewater or will cause the City of Indianapolis’ POTW to violate its NPDES permit or the receiving stream’s water quality standards;
(9) Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes, inks and vegetable tanning solutions;
(10) Any wastewater containing radioactive material above limits contained in regulations, licenses or orders issued by the appropriate authority having control over their use. The disposal of any licensed radioactive material must meet applicable local, state and federal requirements;
(11) Any wastewater containing a total petroleum hydrocarbons concentration as determined by a procedure deemed appropriate by the Director in excess of 200 mg/l. This limitation shall apply at the point of discharge to the City sewer system and is the maximum concentration allowed in any single grab sample collected from the wastestream;
(12) Any gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, carbides, hydrides, Stoddard solvents, sulfides, epoxides, esters, amines, polynuclear aromatic hydrocarbons, pyridines, new and used motor oil or antifreeze, except at concentrations which do not exceed levels of the substances which are routinely present in the normal wastewater discharge and do not otherwise violate any section of this chapter or the conditions of an industrial discharge permit or a special agreement; and
(13) Polychlorinated biphenyls (PCBs) in any detectable concentrations.
(E) No person shall discharge or cause to be discharged a wastewater which has a 24-hour composite value in excess of the values shown on Table 1 below.
Maximum Allowable Concentration; 24-Hour Composite Sample Value | |
Pollutants | mg/l |
Maximum Allowable Concentration; 24-Hour Composite Sample Value | |
Pollutants | mg/l |
Arsenic | 4.0 |
Cadmium | 1.2 |
Chromium (total) | 24.0 |
Chromium (hex) | 3.4 |
Copper | 2.2 |
Cyanide (amenable) | 0.4 |
Cyanide (total) | 8.0 |
Lead | 4.7 |
Mercury | 0.025 |
Nickel | 7.3 |
Pentachlorophenol | 0.012 |
Phenol | 46.0 |
Silver | 4.2 |
Zinc | 38.0 |
(F) The limitations set forth in Table 1 above apply at the point of discharge to the City sewer system. The limitations for amenable cyanide, total cyanide and phenols apply to 24-hour composite samples only in those cases where the composite sample is preserved according to EPA approved methods prior to collection. Otherwise, the values set forth for amenable cyanide, total cyanide and phenols or, with the approval of the Director, any other listed pollutants shall apply to an instantaneous grab sample taken during prevailing discharge conditions and representative of the facility’s discharge in general. The limitations and requirements imposed in divisions (C) and (D) above shall apply at the point of discharge to the City sewer unless specified otherwise.
(G) A grease interceptor shall be installed in the waste line leading from sinks, drains and other fixtures or equipment in restaurants, cafes, lunch counters, cafeterias, bars and clubs; hotel, hospital, sanitarium, factory or school kitchens; or other establishments where grease may be introduced into the drainage or sewage system in quantities that can affect line stoppage or hinder sewage treatment. The characteristics, size and method of installation of the grease interceptor shall meet the requirements imposed by the City Civil Engineer and shall be reviewed and approved by the City Civil Engineer prior to the commencement of installation. Approval of proposed facilities or equipment does not relieve the person of the responsibility of enlarging or otherwise modifying the facilities to accomplish the intended purpose. On a showing of good cause, the City Civil Engineer may waive this requirement. A grease interceptor is not required for individual dwelling units or for any private living quarters.
(H) No user shall change substantially the character or volume of pollutants discharged to the City’s POTW without prior written notification to the City.