Sec. 15-3. - Prohibitions and limitations on wastewater discharges.

(a)

General prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements.

(b)

Prohibitions on wastewater discharges. No person shall discharge or deposit or cause or allow to be discharged or deposited into the wastewater treatment system any wastewater which contains the following:

(1)

Oil and grease.

a.

Oil and grease concentrations of 100 mg/L or amounts from industrial facilities violating federal pretreatment standards.

b.

Wastewater from industrial facilities containing floatable fats or oil, wax, grease, petroleum oil, cutting oil, or products of mineral oil origin that may cause interference or pass through.

(2)

Explosive mixtures. Liquids, solids, or gases which by reason of their nature or quantity are or may be sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any other way to the sewerage facilities or to the operation of the system. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the sewer system, be more than five percent nor any single reading over ten percent of the lower explosive limit (LEL) of the meter. Also prohibited is the discharge of wastewater which alone or by interaction with other wastewater has a closed cup flashpoint of less than 140 degrees Fahrenheit (60 degrees Celsius) using test methods specified in 40 CFR 261.21. Prohibited materials include, but are not limited to, gasoline, petroleum products, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides, and sulfides.

(3)

Noxious material. Noxious or malodorous solids, liquids, or gasses which either singly or collectively interact with other wastes which are capable of creating a public nuisance or hazard to life, including wastewater which results in the presence of toxic substances, gasses, vapors or fumes within the wastewater treatment system in a quantity sufficient to cause worker health, safety or accessibility problems.

(4)

Radioactive wastes. Radioactive wastes or isotopes of such half-life or concentration that they do not comply with regulations or orders issued by the appropriate authority having control over their use and which will or may cause damage hazards to the wastewater treatment system or personnel operating the system.

(5)

Solid or viscous wastes. Solid or viscous wastes which will or may cause obstruction to the flow in a sewer or otherwise interfere with the proper operation of the wastewater treatment system. Prohibited materials include, but are not limited to, grease, uncomminuted garbage, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastic, tar, asphalt residues from refining or processing of fuel or lubricating oil, and similar substances.

(6)

Excessive discharge rate. Wastewaters at a flow rate or containing such concentrations or quantities that exceed for any time period longer than 15 minutes more than five times the average 24-hour concentration, quantities or flow during normal operation and that would cause a treatment process upset at the wastewater treatment facility and subsequent loss of treatment efficiency.

(7)

Toxic substances. Any toxic substances in amounts exceeding standards promulgated by the administrator of the U.S. Environmental Protection Agency pursuant to section 307(a) of the Act, and chemical elements or compounds, phenols or other taste- or odor-producing substances, or any other substances which are not susceptible to treatment or which may interfere with the biological processes or efficiency of the treatment system, or that will pass through the system. This also includes any wastewater having a lethal concentration of 50 percent (LC 50 ) as determined by a toxicity test of 96 hours or less using 100 percent of the industrial user's discharge and aquatic test species chosen by the superintendent.

(8)

Unpolluted waters. Any unpolluted water, including, but not limited to, water from cooling systems or of stormwater or groundwater origin, which, in the opinion of the superintendent, will significantly increase the hydraulic load on the collection system. This includes, but is not limited to, stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, cooling water and unpolluted wastewater.

(9)

Discolored material. Wastes with objectional color not removable by the treatment process.

(10)

Corrosive wastes. Any waste which will cause corrosion or deterioration of the treatment system. All nondomestic wastes discharged to the public sewer system must have a pH value in the range of 6.0 to 10.0 standard units. Prohibited materials include, but are not limited to, acids, bases, hydroxides, peroxides, sulfides, concentrated chloride and fluoride compounds, and substances which will react with water to form corrosive products.

(11)

Untreatable wastes. Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment system employed, or are amenable to treatment only to such a degree that the wastewater treatment system effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.

(12)

High temperature liquids. Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit (65 degrees Celsius) or which, either singly or in combination with other discharges, would cause a temperature at the introduction into the treatment plant which exceeds 104 degrees Fahrenheit (40 degrees Celsius).

(13)

Viscous wastes. Any water or wastes containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/L or containing substances which may solidify or become viscous at temperatures between 32 degrees Fahrenheit and 150 degrees Fahrenheit (zero degrees Celsius and 65 degrees Celsius).

(14)

Hazardous wastes. Any material identified as hazardous waste according to 40 CFR 261.

(15)

Infectious wastes. Any infectious or medical wastes, except such waste which receives infectious waste pretreatment and meets the approval of the superintendent.

(16)

BOD, suspended solids, total nitrogen, total phosphorus, and flow. Industrial surcharge requirements will be in effect for BOD and TSS greater than 250 mg/L for each parameter. Total nitrogen in excess of 40 mg/L and total phosphorus in excess of seven mg/L will also be subject to industrial surcharges. Industries exceeding these limitations shall be considered significant, and shall require permitting. Flow reflects each industry's average daily discharge. In the event that loadings to the treatment facility approach capacity, the town reserves the right to place more stringent limitations on these parameters.

(17)

Miscellaneous pollutant limitations.

a.

All permitted industrial facilities shall discharge miscellaneous pollutants only in accordance with the limitations stated in their permits.

b.

Facilities subject to these regulations to which permits have not yet been issued shall have in these permits, permit limitations for miscellaneous pollutants. Permits issued may set limitations that shall not exceed:

Table 15-3. Permit Limitations for Miscellaneous Pollutants Parameter Concentration

BOD 2,000 mg/L

Cadmium 0.02 mg/L

Chromium 0.70 mg/L

Copper 0.80 mg/L

Cyanide 0.19 mg/L

Lead 0.15 mg/L

Mercury 1.0 μg/L

Nickel 1.0 mg/L

Phenol 1.0 mg/L

Silver 0.24 mg/L

TSS 2,000 mg/L

Zinc 0.60 mg/L

μg/L = micrograms per liter.

mg/L = milligrams per liter.

More stringent limitations and additional parameters may be required based upon the specific industrial user.

(c)

Dilution. No user shall increase the use of process water or in any way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with this chapter, the federal categorical pretreatment standards, or in any other pollutant specific limitation developed by the town or state.

(d)

Action of superintendent. If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which waters or wastes contain the substances or possess the characteristics enumerated in subsection (b) of this section, and which, in the judgment of the superintendent, may have a deleterious effect upon the sewage works, processes, equipment, or receiving water, or which otherwise create a hazard to life or constitute a public nuisance, the superintendent 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 not covered by existing sewer charges under the provisions of this chapter.

(e)

Review of plant design and installation; applicable requirements. If the superintendent permits the pretreatment or equalization of waste flows for any user, the design and installation of the plant and equipment shall be subject to review and approval of the superintendent, and subject to the requirements of all applicable codes, ordinances, laws, and regulations. All users which, in the determination of the superintendent, require pretreatment shall be subject to all applicable requirements of the town regional wastewater treatment facility industrial pretreatment program.

(Code 1970, § 15-3; Res. of 4-10-1990; Ord. of 10-2-1990; Res. No. 97-06, 1-7-1997; Ord. No. 2008-2, 2-5-2008)