(A) Wastewater discharge permit (permit). Any major industrial user who shall hereafter discharge any industrial wastes into the town’s wastewater treatment system or who desires to discharge any industrial waste into the wastewater treatment system shall make application to the State DHEC for a wastewater discharge permit into the wastewater treatment system. Approval will be granted the applicants and a permit issued for a period specified by State DHEC if evidence is submitted by the applicant that the discharge of wastes will comply with this chapter and applicable state and federal lawful requirements, subject to any special agreements allowed by the Superintendent as stated in the permit. When an industrial user has operated within the terms and conditions of the permit and where no changes in the discharge are planned, extension of the permit for another two-year period shall be granted upon written request by letter.
(B) Equalization basin. In order to equalize flows over a seven-day 29-hour period, each user discharging waste into the town’s sanitary sewers in sufficient volume to interfere with the normal and proper treatment and disposal of sewage at the town’s wastewater treatment system, shall construct and maintain, at his or her own expense, a suitable equalization basin. The basin shall have a capacity adequate to control the flow rate in accordance with § 52.70 and an outlet to the sewer controlled by a waterworks-type rate controller, or other approved device, the setting of which shall be approved by the Superintendent.
(C) Control manhole. Any person discharging industrial wastes into the town’s sanitary sewer shall construct and maintain a suitable control manhole to facilitate observation, measurements and sampling of all wastes including domestic sewage from the user. The manhole shall be installed by the user discharging the wastes, at his or her own expense, and shall be maintained by the user so as to be safe, accessible and in proper operating condition at all times.
(D) Measuring device. Where an equalization basin is not required, the control manhole may, at the industry’s option, be equipped with a measuring device and/or flow meter. If selected, the measuring device shall be a permanent type, volume-measuring device, approved by the Superintendent, installed by the user discharging the wastes at his or her own expense, and shall be maintained by the user so as to be safe, accessible and in proper operating condition at all times.
(E) Grease, oil and sand interceptors. Grease, oil and sand interceptors shall be required when, in the opinion of the Superintendent, 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 user, at his or her expense, in continuously efficient operation at all times.
(F) Plans. Plans for the construction of equalization basins, control manholes and measuring devices and grease, oil and sand interceptors shall be approved by the Superintendent prior to the beginning of construction.
(G) Special agreement. Any waters or wastes discharged by any major industrial user, which have characteristics prohibited in § 52.70, may be admitted into the sanitary sewers when the discharge is approved by the Superintendent within the wastewater discharge permit as a special agreement. The discharges will be subject to a surcharge, as defined herein.
(H) Surcharge. When the concentration of BOD in the industrial waste discharged into the town’s wastewater treatment system exceeds the limits prescribed in § 52.70, a monthly surcharge shall be imposed. Charges will be made for poundages of BOD and flow discharge rate.
(I) Surcharge billing. The surcharge for each parameter shall be applied in addition to the existing regular sewer service charge. All surcharges shall be applied on monthly utility billing and during subsequent months during the calendar year in which the major industrial user exceeds permissible limits.
(J) Surcharge determination. The surcharges shall reflect the total cost of treating the pollutant pounds of industrial waste. The method used to determine the surcharge amount shall consist of dividing the total budget cost for operating each unit process of the town’s wastewater treatment system which is affected by BOD by the total poundage of BOD discharged to the wastewater treatment system during the preceding fiscal year. The rates may be adjusted more frequently if, in the opinion of the town, a more frequent adjustment is warranted.
(K) Determination of character and concentration of waste. The industrial waste of each user discharging the wastes into the town’s wastewater treatment system shall be subject to periodic inspection, and a determination of character and concentration of the wastes shall be made as often as may be deemed necessary by the Superintendent or his or her authorized representative. The inspection and tests shall also be made immediately after any process change which may affect the quantity or quality of the wastes discharged.
(L) Monitoring and testing or procedures. Samples shall be collected in a manner as to be representative of the actual quality of the waste. Laboratory methods used in the examination of the waste shall be those set forth in Standard Methods, copies of which are on file with the Water and Sewer Utilities Department for inspection by any interested parties.
(M) Authority. The determination of the character and concentration of the industrial wastewater by the Superintendent or his or her authorized representative shall be binding as a basis for charges.
(N) Cost.
(1) Total costs incident to the supervision, inspection, sampling and analyzing of wastes, as well as administrative costs, shall be included in the surcharge made to persons discharging wastewater containing BOD into the town’s wastewater treatment system.
(2) For any user required to meet pretreatment standards as promulgated by the state or federal government, the total costs incident to the supervision, inspection, sampling and analyzing of wastes shall be billed to the user in addition to any other charges for use of the wastewater treatment system.
(3) Total costs incident to any wastewater sampling and/or analyses performed by the town at the user’s request will be billed to the user.
(O) Alteration of normal industrial operations. Notice shall be given the Superintendent when normal industrial operation will not be available for discharge, or when a change of process is contemplated, or malfunction of the pretreatment facility occurs or is anticipated, which will alter demands on the town’s wastewater treatment system. Normal operations shall include allowance for legal holidays and other announced plant shutdowns.
(P) By-passing of pretreatment facilities. Where preliminary treatment or holding facilities are required for any purpose, they shall be maintained continuously in satisfactory and effective operation by the user at his or her expense. There shall be no direct discharge of wastes requiring pretreatment to the town’s sanitary or storm sewers, without first notifying and obtaining approval from the Superintendent for the bypassing of the pretreatment facility.
(Prior Code, § 13.12.350) (Ord. 90-02, passed - -)