Chapter 14.25
USE OF PUBLIC SEWERS
Sections:
14.25.010 Prohibited substances.
14.25.020 Interceptors required.
14.25.030 Authority of sewer department.
14.25.040 Preliminary treatment.
14.25.070 Special agreements with industrial concerns.
14.25.010 Prohibited substances.
A. No person shall discharge or cause to be discharged any storm water, surface water, groundwater, roof runoff, subsurface drainage, cooling water or unpolluted industrial process waters to any sanitary sewer.
B. Except as provided in this section no person shall discharge or cause to be discharged any of the following described waters or wastes into any public sewer:
1. Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit.
2. Any water or waste which may contain more than 50 parts per million by weight of fat, oil or grease.
3. Any gasoline, benzene, naptha, 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, paunch manure, grits such as brick, cement, onyx, carbide 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 sewer works.
6. Any waters or wastes having a pH lower than five and one-half or higher than nine or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works.
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 sewage treatment plant.
8. Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the sewage treatment plant.
9. Any noxious or malodorous gas or substance capable of creating a public nuisance. (Prior code § 12-5-1)
14.25.020 Interceptors required.
A. Grease, oil and sand interceptors shall be provided when, in the opinion of the sewer department, 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 private living quarters or dwelling units.
B. Grease and oil interceptors shall be constructed of impervious material 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.
C. Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times. (Prior code § 12-5-2)
14.25.030 Authority of sewer department.
The admission into the public sewers of any waters or waste having any of the following characteristics shall be subject to the review and approval of the sewer department:
A. A five-day biochemical oxygen demand greater than 300 parts per million by weight.
B. Containing more than 350 parts per million by weight of suspended solids.
C. Containing any quantity of substance having the characteristics described in Section 14.25.010.
D. Having an average daily flow of greater than two percent of the average daily sewage flow of the town. (Prior code § 12-5-3)
14.25.040 Preliminary treatment.
A. Required. Where necessary in the opinion of the sewer department, the owner shall provide, at his expense, such preliminary treatment as may be necessary to:
1. Reduce the BOD to 300 parts per million and the suspended solids to 350 parts per million by weight.
2. Reduce objectionable characteristics or constituents to within the maximum limits provided for in Section 14.25.030.
3. Control the quantities and rates of discharge of such waters or wastes.
B. Approval. Plans and specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for approval of the sewer department and the engineering division of the Arizona Department of Health Services. No construction of such facilities shall be commenced until such approvals are obtained in writing.
C. Maintenance of Facilities. 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. (Prior code § 12-5-4)
14.25.050 Manholes.
When required by the sewer department, 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 and sampling of wastes. Such manhole, when required, shall be accessible and safely located and shall be constructed in accordance with plans approved by the sewer department. 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. (Prior code § 12-5-5)
14.25.060 Tests and analyses.
All tests and analyses of the characteristics of waters and wastes to which reference is made in Sections 14.25.010, 14.25.030 and 14.25.040 shall be determined in accordance with “standard methods for examination of water and sewage,” and shall be determined at the control manhole provided for in the preceding section or upon suitable samples taken at such control manhole. (Prior code § 12-5-6)
14.25.070 Special agreements with industrial concerns.
No statement contained in this title 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 § 12-5-7)