(A) In order to promote equalization of flows over a 24-hour period, each person discharging a waste into the town’s sanitary sewers having the following average daily volumes over a period of his or her normal processing period in any one week shall construct and maintain at his or her own expense a suitable storage facility of the corresponding minimum volumes:
Volume of Waste Discharge in Average Gallons per Day Discharged | Minimum Volume of Storage Tank in
Percentage of Daily Volume of Waste |
Volume of Waste Discharge in Average Gallons per Day Discharged | Minimum Volume of Storage Tank in
Percentage of Daily Volume of Waste |
0-20,000 | 0% |
20,001-30,000 | 50% |
30,001-40,000 | 60% |
40,001-50,000 | 70% |
50,001-60,000 | 80% |
60,001-70,000 | 90% |
70,001 and above | 100% |
(B) The storage facility shall have its outlet to the sewer controlled by an approved device, the setting of flow rates being as directed by the Director. When the processing period is less than seven days in any week, the person discharging the waste shall arrange the discharge rate so that his or her storage facility shall be substantially full at the end of his or her processing period. The storage facility shall be discharged during the period of shutdown, unless otherwise directed by the Director.
(C) Storage facility requirements may be waived by the Director in cases where a constant rate of flow is discharged provided:
(1) The normal operating day extends over a 24-hour period and the rate of waste flow and load discharged is that, in the opinion of the Director, the installation of a storage tank would not improve sewer and treatment plant loading conditions; and
(2) All other requirements of this subchapter are fulfilled.
(D) Any person discharging industrial wastes into the town sanitary sewer shall construct and maintain a suitable control manhole to facilitate observation, measurement and sampling of all wastes, including domestic sewage, from the industry. The control manhole shall be constructed downstream from any treatment, storage or other approved works at a suitable and satisfactory location and built in a manner approved by the Director.
(E) Where a storage tank is not required, the control manhole shall be equipped with a permanent type volume measuring device, as a nozzle, or other device approved by the Director. The manhole shall be installed by the person discharging the wastes at his or her own expense and shall be maintained by him or her so as to be safe, accessible and in proper operating condition at all times.
(F) Plans for the construction of the storage tanks, control manholes and controlling devices shall be approved by the Director prior to the beginning of construction.
(G) Persons shall provide, at their own expense, the preliminary handling as may be necessary to control the quantities and rates of discharge of the waters or wastes over a 24-hour period. Plans, specifications and any other pertinent information relating to proposed preliminary treatment or handling facilities shall be submitted for the approval of the Director, and no construction of the facilities shall be commenced until the approval is obtained in writing.
(H) Any waters or wastes discharged by any person, which have the following characteristics, may be admitted into the sanitary sewers after 10-7-1985, when the discharge is approved in writing by the Director:
(1) A B.O.D. greater than 300 mg/l;
(2) C.O.D. of more than 600 mg/l;
(3) A TKN of more than 40 mg/l;
(4) Suspended solids of more than 300 mg/l;
(5) Ammonia of not more than 15 mg/l; or
(6) Other characteristics prohibited in § 51.091.
(I) All sewer users shall participate in the user charge as described in § 51.097. For the purposes of this subchapter, normal domestic waste water is considered to have the following characteristics:
(1) B.O.D. of 300 mg/l;
(2) C.O.D. of 600 mg/l;
(3) TKN of 40 mg/l; and
(4) TSS of 300 mg/l.
(J) When the concentration of B.O.D., C.O.D., TKN or suspended solids in the industrial or municipal waste discharge to the town’s sanitary sewers exceeds the normal characteristics prescribed, a monthly surcharge shall be imposed upon the offending industrial or municipal user’s sewage flow when the excess loading calculated using the purchased water flow or metered waste water flow as hereinafter specified and the unit poundage charge for the actual B.O.D., C.O.D., TKN and suspended solids loadings being received from the discharger. This surcharge shall be invoked as herein provided in addition to the existing regular sewer service charge. The sewer surcharge for each year shall be established by the town at a regular Council meeting before the billing for January. This surcharge shall be applied beginning with the January utility billing and during subsequent months during the calendar year. The surcharge shall reflect the total cost of treating the excess pounds of industrial or municipal waste, including necessary costs of administration of the sewage plants and this subchapter. In addition, each industrial customer affected by the surcharge shall submit to the Director a current list of raw chemicals and other materials used in its manufacturing process. The method used to determine the surcharge amount shall consist of dividing the applicable audited budget cost for operating the town’s waste water treatment system, including applicable administrative and plant debt service, for the preceding fiscal year by the poundages of B.O.D., C.O.D., TKN and suspended solids removed during treatment in that fiscal year. The four resulting unit per pound costs are the surcharge rates for each of the four parameters.
(K) The surcharges shall be billed and payable monthly on a separate bill rendered to the proper users by the town.
(L) Industrial and major commercial users, including municipalities, will be billed for any applicable surcharges according to the monthly billing procedures as described in § 51.097.
(M) All applications for the discharge of industrial wastes into the public sewers shall be made to the Director. Approval will be granted the applications when evidence is submitted by the applicant that the discharge of wastes into the public sewer will comply with this subchapter.
(N) Grease, oil and sand interceptors shall be provided when, in the opinion of the Director of Public Works, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts or any flammable wastes, sand or other harmful ingredients; except, that the interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be maintained by the owner at his or her expense in continuously efficient operation at all times.
(O) Notice shall be given to the Director when normal operations of the industry will be interrupted for 72 hours or longer and wastes will not be available for discharge, or when a change of process is contemplated which will alter demands on the municipal treatment facilities. “Normal operations” shall include allowance for legal holidays and other announced plant shutdowns.
(P) Where preliminary treatment or holding facilities are provided for any purpose, they shall be maintained continuously in satisfactory and effective operation by the owner at his or her expense, and there shall be no discharge of wastes requiring pretreatment either directly or indirectly to the town’s sanitary sewer system, without first notifying and obtaining approval from the Director.
(Q) All industrial users that are discharging incompatible or toxic pollutants shall meet the pretreatment requirements of Best Practicable Technology, as promulgated by the Environmental Protection Agency.
(Prior Code, § 15-39) (Ord. passed 10-7-1985)