§ 19-130. Regulations for use of public sewer.

(a)

No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, cooling water to any community sewer system. Stormwater and all other unpolluted drainage shall be discharged to such sewers as are specifically designed as storm sewers, or to a natural outlet approved by the city. Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any "201" sewer:

(1)

Any liquid or vapor having a temperature higher than 150 degrees.

(2)

Any water or waste which may contain more than 100 parts per million by weight, of fat, oil, or grease.

(3)

Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.

(4)

Any garbage that has not been properly shredded.

(5)

Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, manure, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interferences with the proper operation of the community disposal system.

(6)

Any waters or wastes having a pH lower than 5.5 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structure, equipment and personnel of the community disposal system.

(7)

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 community disposal system. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to Section 307(a) of the Federal Water Pollution Control Act.

(8)

Any noxious or malodorous gas or substance capable of creating a public nuisance.

(9)

Water or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, including wastes which may affect and prohibit the permeability of soils such as dairy products or blood.

(10)

Wastes which, due to characteristics, or strength, result in the violation of the city's NPDES or SDS permit.

(b)

If any water or wastes are discharged, or are proposed to be discharged directly or indirectly to the public sewers, which water or wastes do not meet the standards set out in or promulgated under this subsection, or which in the judgment of the city may have a deleterious effect upon the treatment facilities, processes, equipment, and soil, vegetation and groundwater or which otherwise create a hazard to life, or constitute a public nuisance, the city take all or any of the following steps:

(1)

Refuse to accept the discharges.

(2)

Require control over the quantities and rates of discharge.

(3)

Require pretreatment to an acceptable condition for the discharge to the public sewers.

(4)

Require payment to cover the added cost of handling or treating the wastes.

(c)

The design and installation of plant or equipment for pretreatment or equalization of flows shall be subject to the review and approval of the city, and subject to the requirements of 40 CFR 403, entitled "Pretreatment Standards", and the state pollution control agency.

(d)

Grease, oil and sand interceptors shall be provided when they are necessary for the proper handling of liquid wastes containing grease in excessive amounts or any inflammable wastes, sand, and other harmful ingredients; except that such interceptors shall not be required for private living quarters or dwelling units. All such interceptors shall be of a type and capacity approved by the city engineer, and shall be located as to be readily and easily accessible for cleaning and inspection. 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, watertight, and equipped with easily removable covers which when bolted in place shall be gastight and watertight. Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times.

(e)

The admission into public sewers of any waters or wastes having any of the following characteristics shall be subject to the review and approval of the city council.

(1)

A five-day biochemical oxygen demand greater than 300 parts per million by weight; or

(2)

Containing more than 350 parts per million by weight of suspended solids; or

(3)

Containing any quantity of substance having the characteristics described above; or

(4)

Having an average daily flow greater that two percent of the average daily sewage flow of the city.

(f)

The owner shall provide at his expense, such preliminary treatment as may be necessary to:

(1)

Reduce the biochemical oxygen demand to 300 parts per million and the suspended solids to 350 parts per million by weight; or

(2)

Reduce objectionable characteristics of constituents to within the maximum limits provided for above; or

(3)

Control the quantities and rates of discharges of such waters or wastes.

(g)

Plans, specifications, and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the city council and no construction of such facilities shall be commenced until said approvals are obtained in writing.

(h)

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 expense.

(i)

All measurements, tests, and analysis of the characteristics of water and wastes as referenced shall be determined in accordance with methods employed by the state department of health.

(Ord. No. 5-A, § 2.02, 1-13-86; Ord. No. 362, § 31, 12-8-03)