A. 
General prohibitions. No discharger shall introduce or cause to be introduced any pollutant that causes pass through or interference at the WRRF.
B. 
Specific prohibitions. No discharger shall introduce or cause to be introduced into the WRRF the following pollutants, substances, or wastewater:
(1) 
Pollutants which create a fire or explosive hazard in the WRRF, including, but not limited to, waste streams with a closed cup flashpoint of less than 140° F. (60° C.) using the test methods specified in 40 CFR 261.21;
(2) 
Any wastewater having a pH less than 6.0, greater than 10 or having any other corrosive property capable of causing damage or hazard to structures, equipment or personnel of the wastewater facilities;
(3) 
Solid or viscous substances in amounts which will cause obstruction of the flow in the WRRF resulting in interference;
(4) 
Any wastewater containing toxic pollutants in sufficient quantity, or pollutants, including oxygen demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference in the Saco WRRF;
(5) 
Any substance which will cause the Saco WRRD to violate its MEPDES permit or State of Maine waste discharge license;
(6) 
Any substance which may cause the Saco WRRF's effluent or residues, biosolids or scums to be unsuitable for reclamation and reuse or to interfere with the reclamation process;
(7) 
Wastewater having a temperature greater than 140° F. (60° C.), or which will inhibit biological activity in the treatment plant resulting in interference.;
(8) 
Any slug released in a single extraordinary discharge episode of such volume or strength as to cause interference to the Saco WRRF;
(9) 
Any flow that, by the nature and duration of its discharge, would cause hydraulic overloading conditions in the treatment works;
(10) 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
(11) 
Pollutants which result in the presence of toxic gases, vapors, or fumes within the treatment works in a quantity that may cause acute worker health and safety problems;
(12) 
Trucked or hauled pollutants, except at discharge points designated by the Director in accordance with this chapter;
(13) 
Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
(14) 
Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the Saco WRRF effluent;
(15) 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(16) 
Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Director;
(17) 
Biosolids, screenings, or other residues from pretreatment of nonresidential wastes;
(18) 
Medical wastes, except as specifically authorized by the Director in a wastewater discharge permit (WDP);
(19) 
Wastewater causing, alone or in conjunction with other sources, the Saco WRRF effluent to fail whole effluent toxicity testing;
(20) 
Detergents, surface-active agents, or other substances which have potential to cause excessive foaming in the Saco WRRF;
(21) 
Fats, oils, or greases of animal or vegetable origin in concentrations greater than 100 mg/l;
(22) 
Any wastewater which causes a hazard to human life or creates a public nuisance.
(23) 
Pollutants, substances, or wastewater prohibited by this chapter shall not be processed or stored in such a manner that they could be discharged to the Saco WRRF.
(24) 
The limits fixed herein may be used as a guide in design and plant control but may be altered by the WRRD as required or authorized by state or federal law.
A. 
All dischargers shall meet all state, federal and/or City limitations and requirements to which they are subject. In the case of conflicting standards, the discharger shall conform to the most stringent limitation or requirement.
A. 
All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this article shall be determined in accordance with the latest edition of Standard Methods for the Examination of Water and Wastewater, published by the American Public Health Association, and shall be determined at the control manhole provided or upon suitable samples taken at the control manhole. In the event that no specific manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the sewer to the point at which the building sewer is connected. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the water resource recovery facilities and to determine the existence of hazards to life and property. (The 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 pHs are determined from periodic grab samples.)
B. 
All nonresidential dischargers into a public sewer shall perform such monitoring of their discharge as the Director and/or designee may reasonably require, including installation, use and maintenance of monitoring equipment, keeping records and reporting results of such monitoring to the Director. Such records shall be made available upon request by the Director to other agencies having jurisdiction over discharges to receiving waters.
A. 
The Director is authorized to establish local limits for nonresidential dischargers to the City sewer, pursuant to the Clean Water Act.
B. 
The following limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following, unless otherwise noted in a WDP.
[350] mg/L
BOD5*
[0.001] mg/L
Mercury
[100] mg/L
Oil and grease
[250] mg/L
Total suspended solids*
* Surcharges may be imposed on mass loading limits set forth in a wastewater discharge permit, as specified.
C. 
The above limits apply at the point where the wastewater is discharged to the sewer system.
D. 
The Director may impose mass limitation in addition to concentration-based limitations above.
E. 
The Director may develop BMPs, by ordinance or in a wastewater discharge permit, to implement local limits and requirements of this chapter.
No nonresidential discharge of wastewater to the City sewer shall increase the use of process water, or in any way attempt to dilute a discharge, as a partial or complete substitute for adequate treatment to achieve compliance with a discharge limitation. (Reference: ME DEP Rules, Chapter 528, Section 7(d), Dilution Prohibited as Substitute for Treatment)
No statement contained in this chapter shall be construed as preventing any agreement or arrangement between the City and any discharger whereby waste of unusual strength or character may be accepted by the City for treatment, subject to payment therefor by the nonresidential discharger, provided that such agreement does not contravene any requirement of existing federal laws and is compatible with applicable charges and fees.
A. 
Septic tank waste may be introduced into the Saco WRRF only at locations and at such times established by the Director. Such waste shall not violate this chapter, or any other requirements established by the City, and must have originated from within City boundaries. The Director may require septic tank waste haulers to obtain a WDP.
B. 
Nonresidential hauled wastes may be introduced into the Saco WRRF only at locations and at such times as shall be established by the Director. The Director may require generators and/or haulers of nonresidential wastes to obtain a wastewater discharge permit. The Director also may prohibit the disposal of hauled nonresidential waste. The discharge of hauled nonresidential waste is subject to all applicable requirements of this chapter. The Director or designee may collect samples of each hauled load to ensure compliance with applicable standards. The Director may require the nonresidential waste hauler to provide a waste analysis of any load prior to discharge.
C. 
All waste haulers shall provide a waste-tracking form provided by the WRRD, for every load. (Cross-reference: State of Maine DEP Rules, Chapter 555, Standards for the Addition of Transported Wastes to Wastewater Treatment Facilities)
A. 
Bypass restriction.
(1) 
Bypass is prohibited, unless:
(a) 
Bypass is unavoidable to prevent loss of life, personal injury, or severe property damage;
(b) 
There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventive maintenance; and
(c) 
The discharger submitted notices as required under Subsection B of this section.
B. 
Bypass notification requirements.
(1) 
Anticipated bypass. If a discharger knows in advance of the need for a bypass, it shall submit prior notice to the Director, at least 10 days before the date of the bypass, if possible.
(2) 
Unanticipated bypass. A discharger shall submit verbal notice to the Director of an unanticipated bypass that exceeds applicable permit limits or pretreatment standards within 24 hours from the time it becomes aware of the bypass. A written submission shall also be provided within five days of the time the discharger becomes aware of the bypass. The written submission shall contain a description of the bypass and its cause; the duration of the bypass, including exact dates and times, and, if the bypass has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the bypass. The Director may waive the written report on a case-by-case basis if the oral report has been received within 24 hours.
(3) 
The Director may approve an anticipated bypass, after considering its adverse effects, if the Director determines that it will meet the three conditions above.