§ 13.16.150. Limitations and prohibitions on the discharge of wastes

A. In order to protect the collection system from damage, destruction, deterioration, misuse or malfunction, and to guard against hazards to life and limb and the creation of a public nuisance, wastewater delivered to the collection system shall not:

1. Be of a nature and/or delivered at a rate so as to restrict flow or impair the hydraulic capacity of the facilities;

2. Be of a quantity, quality or other nature as to impair the strength or the durability of the collection system, either by chemical or by mechanical action;

3. Be of a quantity, quality, or other nature as to create flammable or explosive conditions in the facilities;

4. Have flash point lower than one hundred fifty (150) degrees Fahrenheit, as determined by the Tagliabue closed cup method;

5. Have a pH lower than 5.0 or greater than 10.0 or otherwise contain chemical properties which are hazardous or capable of causing damage to any part of the collection system or to maintenance personnel;

6. Include any garbage other than that received directly into the collection system from domestic and commercial garbage grinders in dwellings, restaurants, hotels, stores and institutions, by which such garbage has been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers with no particle greater than one-half-inch in any dimension.

B. None of the following wastewater, industrial wastes, waters or other material shall be discharged into the collection system:

1. Any solid or viscous material which could cause an obstruction to flow in the collection system or in any way could interfere with the treatment process. These materials include, but are not limited to: ashes, wax, paraffin, whole blood, cinders, sand, mud, straw, shavings, metal, glass, rags, lint, feathers, tars, plastics, wood and sawdust, paunch manure, hair and fleshings, entrails, lime slurries, beer and distiller wastes, grain processing wastes, grinding compounds, acetylene generating sludge, chemical residues, acid residues, food processing bulk solids, snow, ice, and all other solid objects, materials, refuse and debris not normally contained in wastewater;

2. Septic tank wastes (septage) or sludge from industrial waste or water treatment plants. Septage disposal shall be in accordance with the directives of the city;

3. Water accumulated in excavations or accumulated as the result of grading water taken from the ground by well points, or any other drainage associated with construction;

4. Stormwater, surface water, groundwater, roof runoff, subsurface drainage, unpolluted industrial process waters. The building inspector shall require existing discharges into sanitary sewers to be eliminated;

5. Any liquid or vapor having a temperature higher than one hundred fifty (150) degrees Fahrenheit or exceeding a lower limit fixed by the superintendent to prevent odor nuisances when the volume of discharge represents a significant portion of the total flow through a particular sewer;

6. Any wastewater containing grease or oil or other substances that will solidify or become discernably viscous at temperatures between fifty (50) degrees Fahrenheit and one hundred fifty (150) degrees Fahrenheit;

7. Any wastewater containing emulsified oil or grease exceeding fifty (50) mg/l or freon-extractable matter;

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

9. Any wastewater containing corrosive, noxious or malodorous materials or substances which (either singly or in combination with other wastes) is capable of: (a) causing damage to the collection system or to any part thereof, (b) creating a public nuisance or hazard, or (c) preventing entry into the collection system for maintenance and repair purposes;

10. In the interest of protecting and preserving the public health and welfare and to comply with both federal and state laws, regulations and permits concerning the discharge of sewage, it is determined and deemed necessary and expedient that the following maximum limits as to quantity of certain substances, materials, waters or wastes to be received in the composite sewage at the city's sewage treatment facilities be established:

Citywide maximum effluent limitations:
B.O.D.	200 mg/l
Suspended solids (SS)	200 mg/l
Maximum temperature	150° Fahrenheit
pH     5 minimum, 10 maximum
Insoluble oils, fats, greases	0
Soluble oils	10 mg/l
Combustible materials	0
Solid or viscous materials capable of obstructing pipe flow or
interfering with treatment	0

 

11. Any wastewater containing acid iron pickling wastes or planting solution unless pretreated to the satisfaction of the superintendent;

12. Any wastewater which contains unusually large amounts of suspended solids or biochemical oxygen demand, or is high in dissolved solids, or contains substances conducive to treating tastes or odors in drinking water supplies;

13. Any material or substance not specifically mentioned in this section which is in itself corrosive, toxic, noxious, or which by interaction with other wastes could produce undesirable effects, including deleterious action on the collection system or on any part thereof, could adversely affect any treatment process, could constitute a hazard to humans or to animals, or could have any adverse effect upon the receiving streams.

(Ord. 9113 § 3 (part), 1991: prior code § 15-316 (part))