(A) Pretreatment will be required in the following instances and the Department shall submit to the applicant the pretreatment levels which must be obtained.
(1) If the Department determines upon the initial application for a permit under this section that the proposed industrial waste must be pretreated by the applicant to lower the level of any of the components of the industrial waste discharge to the sewer.
(2) In the event that the Department must improve the discharge from its wastewater treatment plant or plants, the Department shall require that a permit holder install or enlarge pretreatment facilities to lower the affected component of the permittee’s industrial waste discharge.
(3) If any wastewater prohibited under the conditions of this code is produced, such producer shall pretreat the wastewater to the extent required to comply with the standards established herein before discharging to any sewer.
(4) The acceptability of a pretreatment method for any given discharge, an application for which has been made in accordance with this section and the terms for the installation and use thereof, shall be reviewed by the Department. Such a review shall be made on the basis of sound engineering and operational evaluation, taking into consideration all factors pertinent to the effect of the discharge, both before and after pretreatment on any part of the system.
(5) Pretreatment facilities shall at all times be subject to inspection by the Department in order to determine if such facilities are efficiently performing the function for which they are installed.
(6) If the Department determines that a permittee, because of plant expansion and/or changes in plant operations, has increased either the strength or volume of the discharge, the Department may require additional pretreatment to lower the level of the volume and/or any components of the industrial waste before discharge, unless such permittee has previously made industrial cost recovery payment for reservation of additional industrial capacity.
(7) Pretreatment facilities required under divisions (A)(1) through (A)(7) above shall be provided, operated and maintained at the permit holder’s expense.
(B) Any sludge or other material removed from the industrial waste by the pretreatment facility shall be disposed of in accordance with applicable federal, state and local laws.
(C) (1) Dilution of waste discharged to the sanitary sewer system is prohibited, whether accomplished by the combination of two or more waste streams by a producer or producers, or by the addition of other liquids solely for the purpose of diluting the quality of the waste discharge.
(2) One or more producers may, upon application and approval by the Department, combine industrial waste streams prior to discharge to the town sanitary sewer system if, and only if, such combination of industrial waste streams produces a combined discharge of better quality than the two industrial waste streams would have been if discharged separately. However, if one or more producers are allowed to mix industrial waste streams to produce a better discharge, the user charge established herein, based on the quality of its industrial waste streams prior to combination, shall be paid to the town.
(D) (1) Detailed plans showing any pretreatment facilities shall be submitted to the Department for approval before construction of the facilities. The review of such plans will in no way relieve such permit holders from the responsibility of modifying and operating the facilities to produce an effluent complying with the established conditions of the permit and federal regulations. Any subsequent, significant changes in the approved facilities or methods of operation shall be reported to the Department and must be reviewed and approved by the Department as complying with the provisions herein established.
(2) Furthermore, all facilities, methods of operation and discharges must comply with the rules and regulations contained in 40 C.F.R. part 403.
(E) After the construction plans for such pretreatment plants have been approved and a permit issued, the plans shall be placed on file in permanent reproducible form with the Department without cost to the Department before a connection permit will be issued.
(Prior Code, § 16-2-7)