(A) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, cooling water or unpolluted industrial process waters to any sanitary sewer.
(B) Storm water and all other unpolluted drainage shall be discharged to sewers as are specifically designated as combined sewers or storm sewers, or to a natural outlet approved by the Superintendent. Industrial cooling water or unpolluted process waters may be discharged upon approval of the Superintendent to a storm sewer, combined sewer or natural outlet.
(C) Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to a public sewer:
(1) Any liquid or vapor having a temperature higher than 150ºF;
(2) Any water or waste which may contain more than 100 parts per million, by weight, of fat, oil or grease;
(3) Any water or waste which may contain more than 25 parts per million, by weight, of soluble oils;
(4) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas;
(5) Any garbage that has not been properly shredded;
(6) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works;
(7) Any waters or wastes having a pH lower than 5.0 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works;
(8) Any waters or wastes containing a toxic or poisonous substance in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, or create any hazard in the receiving waters of the sewage treatment plant;
(9) Any waters or wastes containing suspended solids of character and quantity that unusual attention or expense is required to handle the materials at the sewage disposal plant;
(10) Any noxious or malodorous gas or substance capable of creating a public nuisance;
(11) Any waste flow or batch discharge in excess of:
(a) 6 mg/l of zinc as Zn;
(b) 2 mg/l of total chromium as Cr;
(c) 1.5 mg/l of cadmium as Cd;
(d) 1 mg/l of copper as Cu;
(e) 1 mg/l of cyanide as Cn;
(f) 1.5 mg/l of nickel as Ni; and
(g) .02 mg/l phenol.
(12) Any discharge of phosphorus, ammonia, nitrates, sugars, or other nutrients or waste waters containing them shall be limited to the extent necessary to prevent adverse effects on treatment processes or the stimulation of growths of algae, weeds and slimes, which are or may become injurious to water supply, recreational use of water, fish, wildlife and other aquatic life;
(13) Any paints, oils, lacquers, thinners or solvents, including any waste containing a toxic or deleterious substance, in sufficient quantity to impair the sewage treatment process or constitute a hazard to employees working the sewer system and treatment plant;
(14) Any excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions), or any unusual chemical oxygen demand, chlorides, sulfates or chlorine requirements in quantities as to constitute a significant load on the sewage treatment works;
(15) Any radioactive wastes or isotopes of a half-life or concentration as may exceed limits established by applicable state or federal regulations; and
(16) Any sludge, precipitate or congealed substance resulting from an industrial or commercial process, or resulting from the pre-treatment of the person's waste water or air pollutants.
(Prior Code, § 3.2A.1)
(D) (1) Grease, oil and sand interceptors shall be provided when, in the opinion of the Inspector, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand and other harmful ingredients; except that the interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Superintendent and shall be located as to be readily and easily accessible for cleaning and inspection.
(2) Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, water tight, and equipped with easily removable covers which, when bolted in place, shall be gas tight and water tight.
(E) (1) Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his or her expense, in continuously efficient operation at all times.
(2) The Town Manager, Street Superintendent, and/or the Wastewater Treatment Plant Operator for the town shall establish a minimum program of best management practices, which shall include those items set forth in division (E)(5) below to properly maintain grease traps and interceptors so as to prevent the introduction into the sanitary sewer system of as much of the materials as is possible. The best management practices shall include, but not necessarily be limited to, those items set forth in division (E)(5) below, including the requirement that each establishment that must maintain the trap or interceptor shall keep and maintain a maintenance log serving as a record of the frequency and volume of cleaning the trap or interceptor. All maintenance that is performed by the establishment shall be maintained in the log and the log shall be available for inspection by the town and its agents upon reasonable notice to the establishment. The maintenance logs shall be kept up-to-date with as much detailed information as is possible to ensure that the establishment is following the best management practices as established by the town.
(3) For those establishments that do not have enough volume to require a grease interceptor to be located thereon, weekly cleaning of any under-sink grease trap by the establishment's own maintenance staff will be required. In the opinion of the Town Manager, Street Superintendent, and/or Wastewater Treatment Plant Operator, if the grease trap is not providing adequate protection, the town will require installation of a grease interceptor.
(4) All interceptors must be cleaned routinely to ensure that grease accumulation does not cause the interceptor to operate poorly, and the Town Manager, Street Superintendent and/or Wastewater Treatment Plant Operator shall have authority under this section to establish a cleaning frequency for each establishment based on the size of the interceptor and the volume of flow discharged by the establishment. The town personnel shall also have the right to establish other reasonable steps that must be followed to ensure that the terms of this section are followed.
(5) Best management practices (BMPs) to properly maintain grease traps and interceptors to prevent introduction into the sanitary sewer system.
BMP | Reason For | Benefits to Food Service Establishment |
Witness all grease trap or interceptor cleaning and maintenance activities to ensure the device is properly operating. | Grease trap/interceptor pumpers may take shortcuts. If the establishment manager inspects the cleaning operation and ensures it is consistent with proper cleaning procedures, they are more assured of getting full value for their money. | The establishment will ensure it is getting value for the cost of cleaning the grease trap or interceptor. |
Clean under-sink grease traps weekly. | Under sink grease traps have less volume than grease interceptors. Weekly cleaning of under sink grease traps by the establishment's own maintenance staff will reduce the cost of cleaning the grease interceptor. If the establishment does not have a grease interceptor, the under sink grease trap is the only means of preventing grease from entering the sanitary sewer system. If the grease trap is not providing adequate protection, the Town will require installation of a grease interceptor. | This will extend the length of the cleaning cycle for grease interceptors that the establishment maintains. Grease interceptor installation may be waived. |
Clean grease interceptors routinely. | Grease interceptors must be cleaned routinely to ensure that grease accumulation does not cause the interceptor to operate poorly. The cleaning frequency is a function of the type of establishment, the size of the interceptor, and the volume of flow discharged by the establishment. | Routine cleaning will prevent plugging of the sewer line between the food service establishment and the sanitary sewer system. If the line plugs, the sewer line may back up into the establishment, and the business will need to hire someone to unplug it. |
Keep a maintenance log. | The maintenance log serves as a record of the frequency and volume of cleaning the interceptor. It is required by the pretreatment program to ensure that grease trap/interceptor maintenance is performed on a regular basis. | The maintenance log serves as a record of cleaning frequency and can help the establishment manager optimize cleaning frequency to reduce cost. |
(F) (1) The admission into the public sewers of any of the following shall be subject to the review and approval of the Superintendent:
(a) Waters or wastes having a five-day biochemical oxygen demand greater than 400 parts per million by weight;
(b) Waters or wastes containing more than 450 parts per million by weight of suspended solids;
(c) Waters or wastes containing any quantity of substances having the characteristics described in division (C) above; or
(d) Waters or wastes having an average daily flow greater than 2% of the average daily sewage flow of the town.
(2) Where necessary, in the opinion of the Superintendent, the owner shall provide at his or her expense preliminary treatment as may be necessary to:
(a) Reduce the biochemical oxygen demand to 400 parts per million and the suspended solids to 450 parts per million by weight;
(b) Reduce objectionable characteristics or constituents to within the maximum limits provided for in division (C) above; or
(c) Control the quantities and rates of discharge of the water or wastes. Plans, specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the Superintendent and of the State Board of Health, and no construction of facilities shall be commenced until the approval is obtained in writing.
(G) Where preliminary treatment facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation, by the owner at his or her expense.
(H) When required by the Superintendent, the owner of any property served by a building sewer carrying industrial wastes shall install a suitable control manhole in the building sewer to facilitate observation, sampling and measurement of the wastes. The manhole, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the Superintendent. The manhole shall be installed by the owner at his or her expense, and shall be maintained by him or her so as to be safe and accessible at all times.
(I) All measurements, tests, and analyses of the characteristics of water and wastes to which reference is made in divisions (C) and (F) above shall be determined in accordance with Standard Methods for the Examination of Water and Sewage and shall be determined at the control manhole provided for in division (H) above or upon suitable samples taken at the control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected.
(J) No statement contained in this section shall be construed as preventing any special agreement or arrangement between the town and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the town for treatment, subject to payment therefor by the industrial concern.
(Prior Code, §§ 3.2.5, 3.2A.1) (Ord. 212, passed 12-7-1970; Ord. 221, passed 2-19-1973; Ord. 08-006, passed 7-22-2008)
Penalty, see § 50.99