ARTICLE VI. - RATE AND QUALITY OF WASTEWATER DISCHARGED INTO PUBLIC SEWERS

Sec. 22-191. - Inadmissible waters.#

Stormwater, groundwater, roof drainage, street drainage, yard drainage or subsurface drainage shall not be discharged through direct or indirect connections to the public sanitary sewer of the town.

(Code 1972, § 18-31; Ord. No. 2022-14, 11-16-22)

Sec. 22-192. - Unpolluted waters.#

Unpolluted water including, but not limited to, cooling water, process water or blow-down from cooling towers or evaporative coolers shall be discharged to such sewers as are specifically designated as storm drains, or to a natural outlet upon receiving approval from applicable local, state and federal agencies as required.

(Code 1972, § 18-32; Ord. No. 2022-14, 11-16-22)

Sec. 22-193. - Garbage grinder wastes.#

Waste from garbage grinders shall not be discharged into a public sewer except: (1)

Waste generated in preparation of food normally consumed on the premises; or

(2)

Where the user has obtained a permit for the specific use from the director, and agrees to undertake whatever self-monitoring is required to enable the town to determine equitably the charges and fees based on the waste constituents and characteristics.

Such grinders must shred the waste to a degree that all particles will be carried freely under normal flow conditions prevailing in the public sewer. Garbage grinders shall not be used for grinding plastic, paper products, inert materials or garden refuse.

(Code 1972, § 18-33; Ord. No. 2022-14, 11-16-22)

Sec. 22-194. - Restricted waters and wastes.#

(a)

General prohibitions. No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:

(1)

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 wastewater treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the wastewater facilities.

(2)

Any waters or wastes having a pH lower than 5.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater facilities.

(3)

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 wastewater facilities 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.

(4)

Any wastewater having a temperature which exceeds 104 degrees Fahrenheit (40 degrees Celsius) at the influent to the wastewater treatment plant.

(b)

Limited prohibitions. Discharge of the following described substances, materials, waters or wastes shall be limited to concentrations or quantities approved by the director if it appears likely that such wastes can harm either the sewers, wastewater treatment process, or equipment or will cause a disruption of the POTW's sludge process, use or disposal have an adverse effect on the receiving stream; or can otherwise endanger life, limb, public property or constitute a nuisance. In forming his opinion as to the acceptability of these wastes, the director will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in sewers, materials of construction of the sewers, nature of the wastewater treatment process, capacity of the wastewater treatment works, degree of treatability of wastes in the wastewater treatment works and other pertinent factors. The substances prohibited are:

(1)

Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit (65.9 degrees Celsius); provided, however, that the temperature at the influent to the wastewater treatment plant does not exceed 104 degrees Fahrenheit (40 degrees Celsius).

(2)

Any water or waste containing more than 100 mg/L of oil or grease of animal or vegetable origin, containing more than 25 mg/L of oil or grease of mineral or petroleum origin, or containing substances which may solidify or become viscous at temperatures between 32 and 150 degrees Fahrenheit (0 and 65.9 degrees Celsius).

(3)

Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions, whether neutralized or not.

(4)

Any waters or wastes containing objectionable or toxic substances, or wastes exerting an excessive chlorine requirement, to such degree that any such discharge exceeds limits established by this chapter at the point of discharge into the public sewer.

(5)

Any waters or wastes containing phenols or other taste-producing or odor-producing substances, in such concentrations exceeding limits which may be established under this chapter as necessary, to meet the requirements of state, federal or other public agencies.

(6)

Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established under this chapter in compliance with applicable state or federal regulations.

(7)

Any waters or wastes having a pH in excess of 9.5.

(8)

Materials which exert or cause:

a.

Unusual concentrations of inert suspended solids (such as, but not limited to, fuller's earth, lime slurries, and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate).

b.

Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).

c.

Unusual BOD, COD, or chlorine requirements in such quantities as to constitute a significant load on the wastewater treatment works.

d.

Unusual volume of flow or concentration of wastes constituting slugs.

(9)

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

(Code 1972, § 18-34; Ord. No. 2022-14, 11-16-22)

Sec. 22-195. - Regulation of discharge of restricted wastes.#

(a)

Prior to the discharge of any waters or wastes which contain substances or possess the characteristics enumerated in section 22-194, a person must obtain a discharge permit from the director. The director may require that the discharge permit include requirements for:

(1)

Pretreatment, under the industrial pretreatment program described in article VII of this chapter to an acceptable condition for discharge to the public sewers;

(2)

Control over the quantities and rates of discharge; and

(3)

Payment in the form of surcharges, calculated according to the latest rate structure, to cover the added cost of handling and treating the wastes.

(b)

The director may take any of the following actions prior to authorizing discharge of waters or wastes which contain substances or possess the characteristics enumerated in section 22-194:

(1)

Reject the wastes;

(2)

Revoke a discharge permit; and/or

(3)

Take any other administrative sanctions, enforcement actions, and remedial actions as may be desirable, necessary or permitted to achieve the purpose of this chapter.

(Code 1972, § 18-35; Ord. No. 2022-14, 11-16-22)

Sec. 22-196. - Pretreatment and flow equalization facilities.#

If the director permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to review and approval of the director, and subject to the requirements of all applicable state and federal codes, ordinances and laws. Where preliminary treatment or flow equalizing facilities are provided for any waters or wastes, they should be maintained continuously and in satisfactory and effective operation by the owner at his expense.

(Code 1972, § 18-36; Ord. No. 2022-14, 11-16-22)

Sec. 22-197. - Grease, oil and sand interceptors.#

Commercial entities must provide grease, oil, and sand interceptors for the proper handling of liquid waste containing grease in excessive amounts, or any flammable waste, sand or other harmful ingredients. 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 director and shall be located as to be readily and easily accessible for cleaning and inspection. Grease interceptors shall be provided at restaurants and other public eating places. Grease, oil, and sand interceptors shall be maintained in continuous and satisfactory and effective operation by the owner at his expense.

(Code 1972, § 18-37; Ord. No. 2004-34, 9-15-04; Ord. No. 2022-14, 11-16-22)

Sec. 22-198. - Grease removal systems.#

Grease removal systems must be installed at all connections to the town's facilities from users conducting food preparation or food processing operations including, but not limited to, restaurants, nursing homes, schools, hospitals or other connections which discharge or have the potential to discharge quantities of grease to the town's facilities in excess of allowable standards. Grease removal systems must be installed according to the following specifications: (1)

No wastewater, other than from kitchen fixtures or food processing equipment, shall discharge into the grease removal system unless approved by the town in writing. Wastewater from sanitary sources, such as toilets and bathroom sinks, is prohibited from being discharged to the grease removal system.

(2)

All users, with an approved seating capacity of fewer than 40 individuals, must install a passive, under-the-counter grease interceptor. All users, with an approved seating capacity of 40 or more individuals, must install an electrical/mechanical grease removal unit. All such units shall be sized appropriately for discharge as determined by the town.

(3)

In-ground grease removal systems shall have a minimum depth of four feet and a minimum capacity of 500 gallons, and shall have sufficient capacity to provide at least a 24-hour detention period for the process flow. The minimum process flow shall be based on 15 gallons per seat, or chair per day, based upon actual water usage for existing facilities.

(4)

A suitable sampling location shall be provided for sampling of the discharges from grease removal systems. Any plans for such grease removal systems as required in this section shall be submitted for town review and approval prior to installation. The town must be notified 72 hours prior to installation of any grease removal device in order to inspect and oversee the installation. All automatic electrical/mechanical grease removal systems must have a sampling valve installed on the discharge piping with a minimum clearance of eight inches for the installation of sampling bottles.

(5)

The owner(s) shall be responsible for cleaning and maintaining the grease removal systems and shall maintain records of the dates of cleaning and means of disposal, subject to review by the town. Any removal and hauling of the collected materials not performed by the owner(s) must be performed by licensed waste disposal firms.

(6)

All wastewater from food preparation operations and/or washing and clean-up operations, including but not limited to pot sinks, pre-rinse stations, work station, soup kettles, braising pans, mop sinks, and wastewater generated from exhaust fan hood cleaning operations must discharge to the grease removal device. All automatic dishwasher wastewater, excluding pre-rinse stations, may not be discharged into any grease removal device. Dishwasher wastewater must bypass the grease removal device and be discharged directly into the sewer system.

(7)

Garbage disposal units may only be installed in facilities with properly sized and operational in-ground passive type grease interceptors which have been properly designed for retention of settleable solids. Garbage disposal units are prohibited in all other commercial or industrial facilities. Garbage disposal waste shall not be discharged into automatic electrical/mechanical type grease removal systems.

(Ord. No. 2004-34, 9-15-04; Ord. No. 2022-14, 11-16-22)

Secs. 22-199—22-230. - Reserved.#