§ 51.111 SANITARY AND OTHER POLLUTED WATERS.

   No person shall discharge or cause to be discharged to any natural outlet or storm sewer any sanitary wastewater or other polluted waters. Effluent from privately-owned individual household disposal devices shall not be discharged to storm sewers.

(Prior Code, § 51.111) Penalty, see § 51.999

§ 51.112 OTHER PROHIBITED DISCHARGES.

   No person shall discharge, or cause to be discharged, to any sanitary sewer, any of the following described substances, water or wastes:

   (A)   Any liquid or vapor having a temperature higher than 65°C (150°F);

   (B)   Wastes containing oil or grease of petroleum origin;

   (C)   Any gasoline, benzene, naphtha, fuel oil, mineral spirits, commercial solvent, motor oil or other flammable or explosive liquid or any other petroleum derivative;

   (D)   Any water or wastes containing dissolved gases (such as hydrogen sulfide, sulfur dioxide, nitrogen oxides and ammonia) in concentrations sufficient to cause poisonous or toxic fumes or wastewater, or a malodorous or harmful condition;

   (E)   Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, asphalt materials, cement or concrete, paunch manure, hair and fleshing, entrails, lime slurry, lime residues, beer or distillery spent grains, chemical residues, paint residues, cannery waste, bulk solids or any other solid or viscous substances, in amounts capable of causing obstructions to flow in sewers or interference with the proper operation of the wastewater treatment works;

   (F)   Any waters or wastes having a pH lower than 5 or higher than 9 at any time, or having any other corrosive property capable of causing damage or being a hazard to structures, equipment and personnel of the wastewater treatment works;

   (G)   (1)   Any waters or wastes containing pollutants in the form of compounds or elements, in solution or suspension, in concentrations exceeding the following:

Pollutant	Maximum Concentration in mg/l
Arsenic (As)	0.050
Barium (Ba)	1.000
Cadmium (Cd)	0.100
Chromium (Cr) (total)	3.000
Copper (Cu)	1.000
Cyanides (Cn)	2.000
Lead (Pb)	0.100
Manganese (Mn)	1.000
Mercury (Hg)	0.005
Nickel (Ni)	1.000
Selenium (Se)	0.030
Silver (Ag)	0.100

 

      (2)   The maximum concentrations shown for the above metals may be used as a guide in design and plant control but may be altered by the Director of Public Works in the event of accumulative overload on the water pollution control plant.

   (H)   (1)   Any waters or wastes containing heavy metals and toxic materials in concentrations prohibited by state or federal rules, including but not limited to:

         (a)   Antimony;

         (b)   Beryllium;

         (c)   Bismuth;

         (d)   Boron;

         (e)   Cobalt;

         (f)   Molybdenum;

         (g)   Rhenium;

         (h)   Strontium;

         (i)   Tellurium;

         (j)   Fungicides;

         (k)   Herbicides;

         (l)   Pesticides; and

         (m)   Uranyl ion.

      (2)   Unless the permit required for discharge of industrial wastes specifies conditions of pretreatment, concentrations and volumes.

   (I)   Any noxious or malodorous gas or substance, capable of creating a public nuisance or hazard to life or preventing entry into sewers for their inspection, maintenance and repair;

   (J)   Any waters containing quantities of radium, naturally occurring or artificially produced radioisotopes in excess of presently existing or subsequently accepted limits for drinking water as established by the National Committee on Radiation Protection and Measurement;

   (K)   Any concentrated dye wastes, spent tanning solutions or other wastes which are highly colored, or wastes which are of unusual volume, concentration of solids or composition that may create obstruction to the flow in sewers or interference with the wastewater treatment processes without proper pretreatment and written approval of the Director of Public Works;

   (L)   Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable to treatment only to the degree that the wastewater treatment plant effluent cannot meet the requirements of the NPDES permit;

   (M)   Any water or wastes containing more than 2,000 mg/l total solids;

   (N)   Wastes at a flow rate and/or pollutant discharge rate, which is excessive over short periods of time so that there is a treatment process overload and subsequent loss of treatment efficiency; and

   (O)   (1)   Any waters or wastes having any of the following shall be subject to review by the Director of Public Works:

         (a)   A five-day biochemical oxygen demand greater than 250 parts per million by weight;

         (b)   Containing more than 250 parts per million by weight of suspended solids; or

         (c)   Having an average daily flow greater than 2% of the average sewage flow of the city.

      (2)   Where necessary in the opinion of the Director of Public Works, the owner shall provide, at such owner’s expense, such preliminary treatment as may be necessary to:

         (a)   Reduce the biochemical oxygen demand to 250 parts per million by weight;

         (b)   Reduce the suspended solids to 250 parts per million by weight; or

         (c)   Control the quantities and rates of discharge of such waters or wastes.

      (3)   Plans, specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for approval by the City Engineer or Chief Building and Code Inspector and no construction of such facilities shall be commenced until said approvals are obtained in writing.

(Prior Code, § 51.112) (Ord. 2270, passed 6-17-1972; Ord. 2535, passed 12-5-1977; Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999

§ 51.113 SUBSTANCES WHICH MAY BE PROHIBITED FROM PUBLIC SEWERS.

   (A)   (1)   No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes if it appears in the opinion of the Director of Public Works that such wastes can harm the sewers, sewage treatment process or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property or constitute a nuisance.

      (2)   In forming its opinion as to the acceptability of these wastes, the city will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors.

   (B)   The substances prohibited are:

      (1)   Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32°F and 150°F or 0°C and 65°C;

      (2)   Any waters or wastes containing strong acid iron pickling wastes or concentrated plating solutions whether neutralized or not;

      (3)   Any water or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the city for such materials;

      (4)   Any water or wastes containing phenols or other taste- or odor-producing substances, in such concentration exceeding limits which may be established by the city as necessary after treatment of the composite sewage, to meet the requirements of the state, federal or other public agencies of jurisdiction for such discharge to the receiving waters;

      (5)   Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the city in compliance with applicable state or federal regulations; and

      (6)   Materials which exert or cause:

         (a)   Unusual concentration of inert suspended solids (such as, but not limited to, Fullers earth, lime slurries and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sulfate);

         (b)   Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions);

         (c)   Unusual BOD, COD or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works; or

         (d)   Unusual volume of flow or concentration of wastes causing interference in process or operations constituting slugs.

(Prior Code, § 51.113) (Ord. 2270, passed 6-17-1972; Ord. 2535, passed 12-5-1977; Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999

§ 51.114 DILUTION.

   The admission into the public sewers of any waters or wastes in volumes, or with constituents, such that existing dilution conditions in the sewers or at the treatment facility would be adversely affected, shall be subject to review and approval of the Director of Public Works. Where necessary, in the opinion of the Director, pretreatment or equalizing units may be required to bring constituents or volume of flow within an acceptable level, and to hold or equalize flows so that no peak flow conditions may hamper the operation of any unit of the sewer system. The equalization or holding unit shall have a capacity suitable to serve its intended purpose and be equipped with acceptable outlet control facilities to provide flexibility in operation and accommodate changing conditions in the waste flow.

(Prior Code, § 51.114) Penalty, see § 51.999

§ 51.115 DELETERIOUS DISCHARGES.

   (A)   If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which contain substances or possess the characteristics enumerated in the preceding sections of this subchapter, and which in the judgment of the City Engineer, Public Works Director or Chief Building and Code Inspector or the local, state and federal agencies having jurisdiction, may have a deleterious effect upon the wastewater treatment processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Director of Public Works may:

      (1)   Reject the wastes;

      (2)   Require pretreatment to an acceptable condition for discharge to the public sewers;

      (3)   Require control over the quantities and rates of discharge; and

      (4)   Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer user charges.

   (B)   In forming an opinion as to the acceptability of wastes, the Director of Public Works will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the wastewater treatment process, capacity of the wastewater treatment facility, degree of treatability of wastes in the wastewater treatment facility and other pertinent factors. Any waters or wastes having a BOD5 concentration greater than 250 mg/l or a suspended solids concentration greater than 250 mg/l or an average daily flow greater than 2% of the average total waste flow of the city shall be subject to the review of the Director of Public Works.

   (C)   If the Director of Public Works permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the City Engineer, Chief Building and Code Inspector or Director of Public Works, and the local, state and federal agencies having jurisdiction and subject to the requirements of all applicable codes, resolutions and laws. See § 51.132 of this code.

   (D)   In the event of an accidental spill or unavoidable loss to the drains of any deleterious materials, the owner shall promptly notify the Director of Public Works of the nature of the spill, the quantity and time of occurrence.

(Prior Code, § 51.115) (Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999

§ 51.116 WASTES FROM GARBAGE SHREDDERS.

   (A)   No person shall install and operate any garbage shredder equipped with a motor of three-fourths horsepower (seventy-six hundredths metric) or greater in size.

   (B)   No commercial/industrial establishment shall install any garbage shredder or replace an existing garbage shredder.

   (C)   All garbage shredders shall shred the waste to a degree that all particles will be carried freely under normal flow conditions prevailing in the public sewer system. Garbage shredders shall not be used for grinding plastic, paper products, inert materials or garden refuse.

(Prior Code, § 51.116) Penalty, see § 51.999

§ 51.117 GREASE, OIL AND SAND TRAPS.

   Grease, oil and sand interceptors or traps shall be provided by the owner when, in the opinion of the Director of Public Works, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, sand or other harmful ingredients; except that interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Chief Building and Code Inspector or Director of Public Works and shall be located as to be readily and easily accessible for cleaning and inspection.

(Prior Code, § 51.117) (Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999