No person shall discharge, or cause to be discharged to, any sanitary sewer, any of the following described substances, water, or wastes unless authorized by the Public Works Director:
A. Any liquid or vapor having a temperature higher than 65 degrees Celsius (150 degrees Fahrenheit); or which cause the wastewater entering the wastewater treatment facilities; (Lift Stations, Pump Stations, Force Mains, etc.) to exceed 40º Celsius (104º Fahrenheit).
B. Wastes containing oil or grease of petroleum origin shall be prohibited.
C. Any gasoline, benzene, naphtha, fuel oil, mineral spirits, commercial solvent, motor oil, or other flammable or explosive liquid, solid or gas, 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 waste-water, or a malodorous or harmful condition.
E. Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, asphaltic materials, cement or concrete, paunch manure, hair and fleshings, 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 6.0 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. 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 |
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 |
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 in the event of accumulative overload on the water pollution control plant.
H. Any waters or wastes containing heavy metals and toxic materials in concentrations prohibited by state or federal rules, including but not limited to:
Antimony
Beryllium
Bismuth
Boron
Cobalt
Molybdenum
Rhenium
Strontium
Tellurium
Fungicides
Herbicides
Pesticides
Uranyl ion
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 measuring.
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.
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, maximum of 100,000 gallons.
N. Any water or wastes containing more than 230 mg/L chlorides monthly average concentration, 380 mg/L chlorides daily maximum concentration (November 1 – February 28 (29), 389 mg/L chlorides daily maximum concentration (June 1 – October 31) and 390 mg/L daily maximum concentration (March 1 – May 31).
O. Any water or wastes containing Conductivity greater than 2,000 umhos/cm monthly average (April 1 – September 30)
P. 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.
(Amended by Ordinance No. 9813, effective 01/27/2021)