Chapter 13.32
SEWER USE

Sections:

13.32.010 Prohibited discharges – Uncontaminated waters.

13.32.020 Prohibited discharges – Industrial wastewater.

13.32.030 Prohibited discharges – Wastes generally.

13.32.040 Prohibited discharges – Wastes enumerated.

13.32.050 Prohibited discharges – Criteria for determining.

13.32.060 Prohibited discharges – List preparation.

13.32.070 Interceptors – Required.

13.32.080 Interceptors – Maintenance.

13.32.090 Preliminary treatment – Required for certain discharges.

13.32.100 Preliminary treatment – Maintenance of facilities.

13.32.110 Control manholes.

13.32.120 Measurements and tests.

13.32.130 Special agreements.

13.32.140 Swimming pools.

13.32.010 Prohibited discharges – Uncontaminated waters.

No person shall discharge or cause to be discharged any rainwater, stormwater, groundwater, street drainage, subsurface drainage, yard drainage, water from yard fountains, ponds, or lawn sprays, cooling water, or any other uncontaminated water into any sewerage facility which directly or indirectly discharges to facilities owned by the city. (Ord. 76-360 § 601).

13.32.020 Prohibited discharges – Industrial wastewater.

No industrial wastewaters shall be discharged to a trunk sewer or to a sewer discharging directly or indirectly to a trunk sewer until a permit for industrial wastewater discharge has been approved by the city. (Ord. 76-360 § 602).

13.32.030 Prohibited discharges – Wastes generally.

In most cases, the concentration or amount of any particular constituent which will be judged to be excessive or unreasonable cannot be foreseen but will depend on the results of technical determinations and the actions of regulatory agencies. The list of constituents which may be regulated provides specific limits only where they are now reasonably well established. The other constituents in the list are presented with the objectives of enumerating the types of wastes which will be regulated from time to time. (Ord. 76-360 § 603).

13.32.040 Prohibited discharges – Wastes enumerated.

No person shall discharge or cause to be discharged to a public sewer, which directly or indirectly connects to the city’s sewerage systems, any of the following wastes:

1. Gasoline, benzene, naphtha, solvent, fuel oil or any liquid, solid or gas that would cause or tend to cause flammable or explosive conditions to result in the sewerage system;

2. Waste containing toxic or poisonous solids, liquids or gases in such quantities that, alone or in combination with other waste substances, may create a hazard for humans, animals or the local environment, interfere detrimentally with wastewater treatment processes, cause a public nuisance, or cause any hazardous condition to occur in the sewerage system;

3. Waste having a pH lower than 5.5 or having any corrosive or detrimental characteristic that may cause injury to wastewater treatment or maintenance personnel or may cause damage to structures, equipment or other physical facilities of the sewerage system;

4. Solids or viscous substances of such size or in such quantity that they may cause obstruction to flow in the sewer or be detrimental to proper wastewater treatment plant operations. These objectionable substances include, but are not limited to, asphalt, dead animals, offal, ashes, sand, mud, straw, industrial process shavings, metal, glass, rags, feathers, tar, plastics, wood, whole blood, paunch manure, bones, hair and fleshings, entrails, paper dishes, paper cups, milk containers, or other similar paper products, either whole or ground;

5. Rainwater, stormwater, groundwater, street drainage, subsurface drainage, roof drainage, yard drainage, water from yard fountains, ponds, or lawn sprays or any other uncontaminated water;

6. Water added for the purpose of diluting wastes which would otherwise exceed applicable maximum concentration limitations;

7. Nonbiodegradable cutting oils, commonly called soluble oil, which form persistent water emulsions;

8. Nonbiodegradable oil, petroleum oil, or refined petroleum products;

9. Dispersed biodegradable oils and fats, such as lard, tallow, or vegetable oil in excessive concentrations that would tend to cause adverse effects on the sewerage system;

10. Waste with an excessively high concentration of cyanide;

11. Unreasonably large amounts of undissolved or dissolved solids;

12. Wastes with excessively high BOD, COD or decomposable organic content;

13. Strongly odorous wastes or wastes tending to create odors;

14. Wastes containing over 0.1 milligram per liter of dissolved sulfides;

15. Wastes with a pH in excess of 9.0 or high enough to cause alkaline incrustations on sewer walls;

16. Substances promoting or causing the promotion of toxic gases;

17. Wastes having a temperature of 120 degrees Fahrenheit or higher;

18. Wastes requiring an excessive quantity of chlorine or other chemical compound used for disinfection purposes;

19. Excessive amounts of chlorinated hydrocarbon or organic phosphorus-type compounds;

20. Excessive amounts of deionized water, steam condensate or distilled water;

21. Wastes containing substances that may precipitate, solidify, or become viscous at temperatures between 50 and 100 degrees Fahrenheit;

22. Wastes producing excessive discoloration of wastewater or treatment plant effluent;

23. Garbage or wastes that are not ground sufficiently to pass through a three-eighths-inch screen;

24. Wastes containing excessive quantities of iron, boron, chromium, phenol, plastic resins, copper, nickel, zinc, lead, mercury, cadmium, selenium, arsenic or any other objectionable materials toxic to humans, animals, the local environment or to biological or other wastewater treatment processes;

25. Blow-down or bleedwater from cooling towers or other evaporative coolers exceeding one-third of the makeup water;

26. Single-pass cooling water;

27. Excessive quantities of radioactive material wastes;

28. Recognizable portions of the human anatomy;

29. Septic tank wastes. (Ord. 76-360 § 603).

13.32.050 Prohibited discharges – Criteria for determining.

No person shall discharge or cause to be discharged to any public sewer which directly or indirectly connects to the city’s sewerage system any wastes if, in the opinion of the city engineer such wastes may have an adverse or harmful effect on sewers, maintenance personnel, wastewater treatment plant personnel or equipment, treatment plant effluent quality, public or private property, or may otherwise endanger the public, the local environment or create public nuisance. The city engineer, in determining the acceptability of specific wastes, shall consider the nature of the waste and the adequacy and nature of the collection, treatment and disposal system available to accept the waste. (Ord. 76-360 § 603).

13.32.060 Prohibited discharges – List preparation.

The city engineer shall from time to time prepare a list of the maximum permissible quantities or concentrations of certain constituents in industrial wastewater flows and otherwise issue detailed directions for meeting the requirements of this chapter. (Ord. 76-360 § 603).

13.32.070 Interceptors – Required.

Grease, oil and sand interceptors shall be provided 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, or any flammable wastes, sand and other harmful ingredients; except that such interceptors shall not be required for buildings used for residential purposes. All interceptors shall be of a type and capacity approved by the director of public works and shall be so located as to be readily and easily accessible for cleaning and inspection. (Ord. 76-360 § 604).

13.32.080 Interceptors – Maintenance.

All grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times. (Ord. 76-360 § 605).

13.32.090 Preliminary treatment – Required for certain discharges.

A. The admission into the public sewers of any waters or wastes having any of the following characteristics shall be subject to the review and approval of the director of public works:

1. Five-day biochemical oxygen demand greater than 250 milligrams per liter; or

2. Containing more than 250 milligrams per liter of suspended solids; or

3. Containing any quantity of substance having the characteristics described in FMC 13.32.030 through 13.32.060; or

4. Having an average daily flow greater than two percent of the average daily flow of the city.

B. Where necessary, in the opinion of the director of public works, the owner shall provide, at his expense, such preliminary treatment as may be necessary to:

1. Reduce the biochemical oxygen demand to 300 milligrams per liter and the suspended solids to 350 milligrams per liter; or

2. Reduce objectionable characteristics or constituents to within the maximum limits provided for in FMC 13.32.030 through 13.32.060; or

3. Control the quantities and rates of discharge of such waters or wastes.

C. Plans, specifications, and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the city engineer and no construction of such facilities shall be commenced until the approvals are obtained in writing. (Ord. 76-360 § 606).

13.32.100 Preliminary treatment – Maintenance of facilities.

Where required by the city, preliminary treatment facilities for any waters or wastes shall be maintained continuously in satisfactory and effective operation by the owner at his expense and to the satisfaction of the city. (Ord. 76-360 § 607).

13.32.110 Control manholes.

When required by the city, the owner of any property served by the side sewer carrying industrial wastes shall install a suitable control manhole in the side sewer to facilitate observation, sampling, and measurement of wastes. Such manhole, when required, shall be accessible and safely located, and shall be constructed in accordance with plans approved by the city engineer. The manhole shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times. (Ord. 76-360 § 608).

13.32.120 Measurements and tests.

All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in FMC 13.32.030 through 13.32.060 and FMC 13.32.090 shall be determined in accordance with standard methods and shall be determined at the control manhole provided for in FMC 13.32.110, 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 side sewer is connected. (Ord. 76-360 § 609).

13.32.130 Special agreements.

No statement contained in this chapter shall be construed as preventing any special agreement or arrangement between the city and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the city for treatment subject to payment therefor by the industrial concern and subject to such terms and conditions as might be required by city. (Ord. 76-360 § 610).

13.32.140 Swimming pools.

It is unlawful for any person to discharge the contents of a swimming pool into a sanitary sewer. (Ord. 76-360 § 611).