No person(s) shall discharge or cause to be discharged any unpolluted waters such as stormwater, surface water, groundwater, roof runoff, cellar drainage, water from sump pumps, water from building drains, 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 conduits as are specifically designed as storm drains or to a natural outlet approved by the Superintendent. Unpolluted industrial cooling water or unpolluted process waters may be discharged, on approval of the Superintendent, to a storm drain or natural outlet, and the discharge shall comply with all federal, state and local laws, rules, or ordinances and regulations.
No person(s) shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
A. 
Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas which will create a fire or explosive hazard in the Town's wastewater facilities.
B. 
Any water or pollutants containing toxic or poisonous solids, liquids, or gases not listed on Table 1[1] capable of causing, either singly or by interaction with other wastes, injury or interference with any waste treatment process, a hazard to humans or animals, public nuisance, or any hazard in the Town's facilities.
[1]
Editor's Note: Table 1 is included following § 60-33.
C. 
Any waters or wastes having a pH lower than 5.5 or higher than 9.5 or having any other corrosive property capable of causing damage or hazard to the Town's facilities and personnel.
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 Town's facilities, such as, but not limited to, stone, gravel, ashes, cinders, sand, concrete, paving materials, mud, straw, sticks, plaster, cement, mortar, shavings, metal, glass, rags, feathers, tar, plastics, wood, improperly shredded garbage, whole blood, paunch manure, hair, fleshings, entrails, paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
E. 
Any waters or pollutants, including oxygen-demanding pollutants (BOD, etc.), which released in quantities of flow or concentrations or both constitute a slug as defined herein.
F. 
Any heated waters or pollutants in amounts which will inhibit or interfere with biological activity in the Town's wastewater treatment facilities but in no case heated waters or pollutants in such quantities that the temperature at the wastewater treatment facilities influent exceeds 104º F. (40º C.).
G. 
Any other materials as determined by the Selectmen to create an adverse impact upon the wastewater facilities.
The following described substances, materials, wastes or wastewaters, or pollutants discharged to the public sanitary sewers shall be limited to concentrations or quantities which will not harm either the public sewers, wastewater treatment process or other Town facilities, will not have an adverse effect on the receiving stream, or will not otherwise endanger life, limb, or public property or constitute a nuisance. The Selectmen may set concentration limitations lower than the limitations established in regulations below if in the opinion of the Selectmen much more severe limitations are necessary to meet the above objectives. In forming his opinion as to the acceptability, the Superintendent will give consideration to such factors as the quantity of subject wastes in relation to flows and velocities in the sewers, the wastewater treatment process employed, capacity of the wastewater treatment process employed, degree of treatability of the waste in the wastewater treatment plant, and other pertinent factors.
A. 
Liquids or vapors have a temperature higher than 150º F. (65º C.).
B. 
Wastewater containing fats, wax, grease, or oils, whether emulsified or not, in excess of a total of 100 milligrams per liter or containing substances which may solidify or become viscous at temperatures between 32º and 150º F. (0º and 65º C.).
C. 
Garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horsepower or greater shall be subject to review and approval of the Town.
D. 
Waters or wastes containing toxic or poisonous solids, liquids, or gases in sufficient quantity to injure or interfere with any sewage treatment process or the effluent of the Town's sewage treatment facilities. Such toxic substances shall be limited by quantity or concentration to the average concentrations as established in Table 1[1] or as established to meet the requirements of the state, federal, or other public agencies of jurisdiction for such discharge to the receiving waters, whichever is lower. At no time shall the hourly concentration exceed three times the average concentration. If concentrations listed are exceeded, individual establishments will be subject to monitoring and control by the Town in volume and concentration of wastes discharged as provided in § 60-37 of this article.
[1]
Editor's Note: Table 1 is included following § 60-33.
E. 
Any waters or pollutants containing odor-producing substances exceeding limits which may be established by the Town.
F. 
Radioactive wastes or isotopes of half-life or concentrations as may exceed limits established by the Town in compliance with applicable state or federal regulations.
G. 
Quantities of flow or concentrations of any wastewater constituent or both which constitute a slug as defined herein.
H. 
Materials which exert or cause:
(1) 
Unusual concentrations of inert suspended solids, such as, but not limited to, fullers earth, lime slurries, or lime residues, or of dissolved solids, such as, but not limited to, sodium chloride and sodium sulfate.
(2) 
Excessive discoloration such as, but not limited to, dye wastes and vegetable tanning solutions.
(3) 
Unusual BOD, chemical oxygen demand, or chlorine requirement in such quantities as to constitute a significant load on the Town's treatment facilities.
(4) 
Unusual volume of flow or concentration of wastes constituting organic wastes.
I. 
Boiler blowoffs or sediment traps.
J. 
Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment process employed or are amenable to treatment only to such a degree that the sewage treatment facility effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
K. 
Any water or pollutant which, by interaction with other water or pollutants in the public sewer system, releases obnoxious gases or forms suspended solids which interfere with, or create a condition deleterious to, the Town's facilities and operation.
L. 
Any other materials as determined by the Selectmen to create an adverse impact upon the wastewater facilities.
A. 
If any waters or wastes are discharged or are proposed to be discharged to the public sanitary sewers, which waters contain substances in excess of the limits set forth in Table 1 or having a daily flow greater than 2% of the average daily flow of the Town's treatment facility, and which in the judgment of the Town may have a deleterious effect upon the facilities, processes, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Selectmen may:
(1) 
Reject the wastes.
(2) 
Require pretreatment by the owner or applicant to an acceptable condition prior to discharge to the public sanitary sewers.
(3) 
Require payment to cover the added cost of handling initial or periodic testing, sampling and treatment of wastes.
B. 
If the Selectmen require the pretreatment or equalization of waste flows, the design and installation of the process structures and equipment shall be subject to review of the codes, ordinances, and laws. Plans, specifications, and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for review. No construction of such facilities shall be commenced until the review is completed and permission to proceed is obtained in writing.
Table 1 Limits of Certain Constituents
Acceptable in Discharge to Town's Facilities
Constituent
Concentration
(mg/l)
BOD
300
Suspended solids
350
Dissolved solids
600
Settleable solids
20
Ammonia as N
15
Total Nitrogen
25
Boron as Bo
5.0
Cadmium as Cd
0.05
Calcium as Ca
400
Chloride as Cl
500
Chlorine demand
15.0
Chromium as Cr (hexavalent)
0.05
Chromium Cr (total)
0.25
Copper as Cu
0.05
Cyanides as Cn
0.03
Iron as Fe
5.0
Fluoride as F
1.5
Lead as Pb
0.4
Magnesium as Mg
100
Manganese as Mn
5.0
Mercury
Not detectable
Nickel as Ni
0.5
Phenol as C6H50H
0.1
Phosphate as P
10
Potassium as K
500
Silver as Ag
0.10
Sulfate as S04
250
Sulfide as S
1.0
Zinc as Zn
0.5
No industrial sludges from septic tanks, cesspools, or other receptacles storing organic wastes shall be discharged to the Town's wastewater facilities.
[Amended 6-11-2003; 6-9-2010]
A. 
Grease, oil, and sand interceptors shall be provided when, in the opinion of the Wastewater Treatment Plant Superintendent, 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 Selectmen and shall be located so as to be readily and easily accessible for cleaning and inspection.
B. 
In maintaining these interceptors the owner(s) shall be responsible for the proper removal and disposal by legal and environmentally safe methods of the captured material and shall maintain records of the date, name of hauler, quantity hauled, and means of disposal. Signed copies of these records shall be submitted every one year to the Selectmen. Any removal and hauling of the collected materials shall be performed by state-licensed waste disposal firms.
Where preliminary treatment 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 Selectmen, the owner of any property serviced by a building sewer into which industrial wastewaters are discharged shall install a suitable control manhole together with such necessary monitoring equipment and other appurtenances to facilitate observation, sampling and measurement of the wastewaters in the building sewer. Such manholes and equipment, when required, shall be safely and accessibly located and shall be constructed in accordance with plans reviewed by the Superintendent. The manhole shall be installed by the owner at his expense and shall be maintained by him/her so as to be safe and accessible at all times. The owner shall, if required by the Selectmen, perform flow measurements and analyses of the wastewaters at his expense.
The Selectmen may require a user of sewer services to provide information needed to determine compliance with this chapter. The requirements may include:
A. 
Wastewater discharge peak rate and volume over a specified time period.
B. 
Chemical analyses of wastewater performed by a laboratory that satisfactorily participates in the United States Environmental Protection Agency (USEPA) Water Pollution Series of Performance Evaluations.
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 the user's property showing location of all structures, waterlines, storm drainage, sewers and pretreatment facility location, drawn to a scale determined by the Superintendent.
F. 
Details of wastewater pretreatment facility design and construction.
G. 
And details of systems to prevent spills or control the losses of materials through spills to the public sewer.
A. 
All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with Standard Methods or equivalent USEPA methods as outlined in 40 CFR 261 and shall be determined at the control manhole provided based on suitable samples taken at the control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected. Sampling shall be carried out as outlined in the USEPA Handbook for Sampling and Sample Preservation of Water and Wastewater to reflect the effect of constituents upon the Town's facilities and to determine the existence of hazards to life, limb, and property. (The particular analyses involved will determine whether a twenty-four-hour composite of all outfalls of a premises is appropriate or whether a grab sample or samples should be taken.) Normally, but not always, BOD and suspended solids analyses are obtained from twenty-four-hour composites of all outfalls, whereas pH's are determined from periodic grab samples. The owner shall submit to the Superintendent on the first of the month the results of any monitoring and testing required by the Selectmen. These records shall be available for review by local, state and federal agencies.
[Amended 6-11-2003]
B. 
All industries discharging into a public sewer shall perform such monitoring of their discharges as the Selectmen may reasonably require, including installation, use, and maintenance of appropriate sampling and monitoring of the equipment, keeping records and reporting the results of such monitoring to the Selectmen. Such records shall be made available upon request by the Selectmen to other agencies having jurisdiction over discharges to the receiving waters.
The Selectmen will develop and enforce pretreatment regulations for existing and new sources of pollution that are discharged or proposed to be discharged into the municipally owned wastewater facilities as set forth in Title 40, Chapter 1, Part 128 and Part 403 of the Final Rules of the United States Environmental Protection Agency.
The Selectmen shall require 45 days' notification of any new proposed discharge having a daily flow greater than 2% of the average daily flow of the Town's facilities. In addition, changes in volume or character of wastewater greater than 20% shall require said notification.
No statement contained in this article shall be construed as preventing any special agreement or arrangements between the Town and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the Town for treatment, subject to payment therefor by the industrial concern, provided that such agreements do not contravene any requirements of existing federal or state laws and/or regulations promulgated thereunder and are compatible with any user charge and industrial cost recovery system in effect.