The following section is a general overview of the federal regulations which govern abnormal discharges into publicly owned wastewater systems. Complete pre-treatment and pollutant discharge limit standards are presented in the Federal Register 40 CFR Part 403, 43-FR- 27736, dated June 26, 1978 (General Pre-treatment Regulations) and 44 CFR Part 413, 44-FR- 65330, dated October 1, 1979 (Electroplating Point Source Category) plus any subsequent federal revisions.
All Village sewers are designed to transfer normal strength and water-carried wastes from residences, commercial buildings, industrial plants, and institutions together with minor quantities of ground, storm and surface waters that are not admitted intentionally. “Normal strength” shall be defined as not exceeding the following pollutant levels.
BOD | 240 mg/1 |
SS | 240 mg/1 |
Total Phosphorus as P | 8 mg/1 |
Ammonia Nitrogen | 10 mg/1 |
Total Kjeldahl Nitrogen as N | 25 mg/1 |
Biodegradable oil and grease | 50 mg/1 |
(a) Specific Prohibitions.
(1) Prohibition on Unpolluted Water. No person shall discharge or cause to be discharged to any sanitary sewer any of the following: storm water, surface water, ground water, roof runoff water, subsurface drainage, foundation tile drainage, uncontaminated air conditioning water, refrigeration water or evaporative cooling water, or unpolluted industrial process waters.
Any existing roof drain connection to sanitary sewers shall be connected into an available storm sewer or shall be disconnected above ground and discharged on the surface of the ground. The abandoned sanitary sewer connection pipe shall be permanently sealed. All work will be performed at the owner’s expense after receiving a compliance schedule from the Village Administrator.
A. Any person found discharging “unpolluted water” to the sanitary sewer service and
1. Has not met the compliance schedule;
2. Has not had the repairs inspected; or
3. Has not had the repairs certified by the Village Administrator shall be a violation.
(2) Any garbage that has not been properly shredded by garbage grinders that are 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.
(3) A maximum flow of 25,000 gpd or no more than 5 percent of the average daily flow of the receiving wastewater treatment facility.
(4) Any waters or wastes containing solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes to:
A. Injure or interfere with any wastewater treatment process,
B. Constitute a hazard to humans or animals,
C. Create a public nuisance,
D. Create any hazard in the receiving waters of the wastewater treatment plant.
The following concentrations shall not be exceeded in industrial wastes discharged to the public sewers.
Free cyanide | 0.08 mg/1 |
Total cyanide | 0.24 mg/1 |
Hexavalent chromium | 0.09 mg/1 |
Total chromium | 1.6 mg/1 |
Copper | 2.0 mg/1 |
Zinc | 1.5 mg/1 |
Cadmium | 0.5 mg/1 |
Nickel | 1.8 mg/1 |
Phenols | 0.2 mg/1 |
Lead | 0.4 mg/1 |
Mercury | 0.01 mg/1 |
Silver | 0.2 mg/1 |
These maximum concentrations may be changed as necessary by the Water-Wastewater Supervisor or state regulatory agencies based on new information concerning initiatory substances or to protect treatment plant processes and/or receiving stream.
(b) Substances Prohibited. No person shall discharge or cause to be discharged any of the following described waters or wastes to the sanitary sewer.
(1) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
(2) Any waters or wastes having a pH lower than 5.5 or higher than 10.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater works.
(3) Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers or other interferences with the proper operation of the wastewater facilities such as, but not limited to, ashes, bones, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
(c) Substances Limited. The following described substances, materials, waters, or waste shall be limited in discharges to the sanitary sewer system to concentration 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. Limitations or restrictions on materials or characteristics of waste or wastewater discharged to the sanitary sewer which shall not be violated without approval of the Water-Wastewater Supervisor are as follows:
(1) Wastewater having a temperature higher than 65 degrees Celsius (150F).
(2) Wastewater containing more than 12 mg/1 of petroleum all non- biodegradable cutting oils, product of mineral oil origin, or floatable oils, fat, wax or grease.
(3) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Water-Wastewater Supervisor or any local or state regulatory agencies.
(4) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits in compliance with applicable state or federal regulations.
(5) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable only to such degree that the wastewater treatment plant effluent cannot meet the requirements of agencies having jurisdiction over discharge to the receiving waters.
(6) 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 structure and treatment processes.
(7) Any water or wastes causing discoloration of the receiving wastewater treatment facility effluent.
Special agreement or arrangement between the Village and any person whereby an industrial waste of unusual strength or character may be accepted by the Village is possible on a case-by-case basis.
(d) Authority for Control of Wastewater Discharges. If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which contain the substances or possess the characteristics enumerated in this Section, which in the judgment of the Water-Wastewater Supervisor may have a deleterious effect upon the wastewater facilities, processes, equipment or receiving waters, including violation of applicable water quality standard, or which otherwise create a hazard to life or constitute a public nuisance, the Water-Wastewater Supervisor may:
(1) Reject the wastes,
(2) Require pretreatment 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 cost of handling and treating the wastes per the following formula:
P = C | X | (B-240 (240 | + | S-240 240 | + | P-8 8 | + | N-10) 10) |
Where:
P is the required monthly charge expressed in dollars.
C is the standard sewer billing based on monthly flow.
B is the average BOD of the waste expressed in mg/1 of the highest 22 consecutive work days. If B is equal to or less than 240 mg/1, then the B bracket term is equal to zero.
S is the average SS of the waste expressed in mg/1 of the highest 22 consecutive work days. If S is equal to or less than 240 mg/1 then the S bracket term is equal to zero.
P is the average total phosphorus content of the waste expressed in mg/1 of the highest 22 consecutive work days. If P is equal to or less than 8 mg/1, then the P bracket term is equal to zero.
N is the average of the ammonia nitrogen content of the waste expressed in mg/1 of the highest 22 consecutive work days. If N is equal to or less than 10 mg/1, then the N bracket term is equal to zero. (Ord. 94-6. Passed 5-2-94.)