No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters to any sanitary sewer.
Stormwater and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as storm sewers or to a natural outlet approved by the County. Industrial cooling water or unpolluted process waters may be discharged, on approval of the County, to a storm sewer or natural outlet.
No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
A. 
Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
B. 
Any waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance or create any hazard in the receiving waters of the sewage treatment plant.
C. 
Any waters or wastes having pH lower than 6.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works.
D. 
Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works, such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
The following described substances, materials, waters or waste shall be limited in discharges to County systems to concentrations or quantities which will not harm either the sewers, wastewater treatment process or equipment, will not have an adverse effect on the receiving stream or will not otherwise endanger lives, limb, public property or constitute a nuisance. The Director of the Department of Public Works may set limitations lower than the limitations established in the regulations following if, in his opinion, such more severe limitations are necessary to meet the above objectives. In forming his opinion as to the acceptability, the Director of the Department of Public Works will give consideration to such factors as the quantity of subject waste in relation to flows and velocities in the sewers, materials of construction of the sewers, the wastewater treatment process employed, capacity of the wastewater treatment plant, degree of treatability of the waste in the wastewater treatment plant and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the Director of the Department of Public Works are as follows:
A. 
Any liquid or vapor having a temperature higher than 150° F. (65° C.).
B. 
Wastewater containing more than 25 milligrams per liter of petroleum oil, nonbiodegradable cutting oils or product of mineral oil origin.
C. 
Wastewater from industrial plants containing floatable oils, fat or grease.
D. 
Any garbage that has not been properly shredded. Garbage grinders may be connected to sanitary sewers from homes, hotels, institutions, restaurants, hospitals, catering establishments or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
E. 
Any waters or wastes containing objectionable or toxic substances or wastes exerting an excessive chlorine requirement or excessive chemical treatment, to such degree that any such material received in composite sewage at the wastewater treatment works exceeds the limits established by the County for such materials. The following substances are not permitted in concentration above those listed. Restrictions may also be placed on other substances or the present concentration limits may be revised when it is shown that the presence of these substances or concentrations at a treatment plant is sufficient to adversely affect any portion of the treatment process.
Substance
Maximum Allowable Concentration
(mg/l)
Arsenic as As
0.5
Cadmium as Cd
0.4
Chromium (hexavalent) as Cr
0.2
Copper as Cu
1.0
Cyanides or cyanogen compounds as CN
0.5
Lead as Pb
0.5
Mercury or mercury compounds as Hg
0.5
Nickel as Ni
2.0
Zinc as Zn
5.0
F. 
Any waters or wastes containing phenols or any other taste- or odor-producing substances, in such concentrations exceeding limits which may be established by the County as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal or other public agencies of jurisdiction for such discharge to the receiving waters.
G. 
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the County in compliance with applicable state or federal regulations.
H. 
Any water or wastes having a pH in excess of 9.0.
[Amended 11-13-2012 by Ord. No. 2012-12]
I. 
Quantities of flow, concentration or both which constitute a slug as defined herein.
J. 
Waters and wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed or are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
K. 
Any water or wastes which, by interaction with other water or wastes in the public sewer system, release obnoxious gases, form suspended solids which interfere with the collection system or create a condition deleterious to structures and treatment processes.
A. 
If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in § 365-22, and which, in the judgment of the County, may have a deleterious effect upon the sewage works, processes, equipment or receiving waters or which otherwise create a hazard to life or constitute a public nuisance, the County may:
(1) 
Reject the wastes;
(2) 
Require pretreatment according to the pretreatment standards as adopted by the County to an acceptable condition for discharge to the public sewers;
(3) 
Require control over the quantities and rates of discharge; and/or
(4) 
Require payment to cover the added costs of handling and treating the wastes not covered by existing taxes or sewer charges.
B. 
If the County permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the County and subject to the requirements of all applicable codes, ordinances, regulations and laws.
Grease, oil and sand interceptors shall be provided when, in the opinion of the County, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts or any flammable wastes, sand or other harmful ingredients, except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the County and shall be located so as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors, the owners shall be responsible for the proper removal and disposal by appropriate means of the captured material and shall maintain records of the dates and means of disposal which are subject to review by the County. Any removal and hauling of the collected materials not performed by the owner's personnel must be performed by currently licensed waste disposal firms.
Where pretreatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
When required by the County, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable control structure, together with necessary meters and other appurtenances in the control structure, to facilitate observation, sampling and measurement of the wastes. Such structure, when required, shall be accessibly and safely located and shall be constructed in accordance with plans approved by the County. The structure 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.
The County may require a user of sewer services to provide information needed to determine compliance with this Part 2. These requirements may include:
A. 
Wastewater discharge peak rate and volume over a specified time period.
B. 
Chemical analyses of wastewaters.
C. 
Information on raw materials, processes and products affecting wastewater volume and quality.
D. 
Quantity and disposition of specific liquid, sludge, oil, solvent or other materials important to sewer use control.
E. 
A plot plan of sewers in the user's property showing sewer and pretreatment facility location.
F. 
Details of wastewater pretreatment facilities.
G. 
Details of systems to prevent and control the losses of materials through spills to the municipal sewer.
H. 
Any other information required by the flow measurement, sampling, analysis and monitoring standards as adopted by the County.
All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this Part 2 shall be determined in accordance with the latest edition of Standard Methods for the Examination of Water and Waste Water, published by the American Public Health Association, and shall be determined at the control structure provided or upon suitable samples taken at said control structure. In the event that no special structure has been required, the control structure shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected. Sampling methods, location, times, durations and frequencies are to be determined on an individual basis by the Director of the Department of Public Works.
No statement contained in this article shall be construed as preventing any special agreement or arrangement between the County and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the County for treatment, subject to payment therefor by the industrial concern.