Section 2 - General Sewer Use Requirements

2.7 Dilution

No user shall ever 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 unless expressly authorized by an applicable pretreatment standard or requirement. The Superintendent may impose mass limitation on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.

2.6 Utility Service Board’s Right of Revision

The Utility Service Board reserves the right to establish, by ordinance or in wastewater discharge permits, different or more stringent standards or requirements on discharges to the POTWs. It is within the Utility’s discretion to negotiate specific prohibitions on a case-by-case basis for any limitations, assuming that the POTW NPDES permit compliance is not jeopardized. It is further understood that Peru Utilities and the Grissom Aeroplex Utilities may have entered into contracts predating this ordinance which may define limitations and conditions which are different that those listed herein. In those specific cases the original contract may govern given that NPDES compliance is not jeopardized.

2.5 Local Limits – Peru and Grissom Aeroplex POTW

The following pollutant limitations are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following daily maximum concentrations based upon a 24-hour composite sample. Additionally, no person shall discharge wastewater containing in excess of the following maximum concentrations times a multiplier of 1.5 based upon a grab sample. The 1.5 grab sample multiplier does not apply to cyanide and phenols in that analytical procedures do not allow for composite techniques to be applied to these parameters. For cyanide and phenols, three (3) grab sample results shall be analyzed with results not to exceed the following noted limitations.

Grissom Aeroplex POTW Peru Utilities

0.40 mg/l Arsenic 0.40 mg/l Arsenic
0.4 mg/l Cadmium 0.4 mg/l Cadmium
4.5 mg/l Chromium, Total 4.5 mg/l Chromium, Total
3.38 mg/l Copper 3.38 mg/l Copper
0.26 mg/l Cyanide, Total 0.5 mg/l Cyanide, Total
100 mg/l Oil & Grease [1] 100 mg/l Oil & Grease [1]
6.0 - 9.0 pH 6.0 - 10.5 pH
0.28 mg/l Lead 1.145 mg/l Lead
3.98 mg/l Nickel 3.98 mg/l Nickel
2.0 mg/l Silver 2.0 mg/l Silver
2.61 mg/l Zinc 2.61 mg/l Zinc
2.13 mg/l
TTO
(Total Toxic Organics) 2.13 mg/l TTO
(Total Toxic Organics)

The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances for “total” metal unless indicated otherwise. The Superintendent may impose mass limitations in addition to. Or in place of, the concentration-based limitations above.

Upon the promulgation of the National Categorical Pretreatment Standard (NCPS) for a particular user, the said standard, if more stringent than the limitations imposed under this chapter for sources in that category, shall, when effective, immediately supersede the limitations and conditions imposed under this ordinance. The Superintendent shall notify all known affected users of the applicable permitting and reporting requirements under 40 CFR 403.12.

[1] As an alternative to the total oil and grease limitations established by this section, the Superintendent may establish in an IWP a limitation of 100 mg/l for non-polar grease. The alternative limitation is subject to the following conditions:

  • The user submits an application for the alternative limit;
  • The user provides information regarding the user’s products, processes, and operations that shows to the Superintendent’s satisfaction that the oil and grease discharged by the user is predominantly of animal or vegetable origin;
  • The user shows that the oil and grease in the user’s discharges is not visible, free, or floating at 50°F at any time;
  • The user has sampling facilities that allow for both visual inspection of the user’s discharge and using the equipment necessary for collection of samples for floatable oil and grease;
  • The oil and grease in the user’s discharge is not related to past instances of obstruction, interference, or pass through;
  • Users subject to the alternative limit shall continue to operate and maintain grease traps and any other oil and grease separation and treatment equipment and shall continue all existing practices that reduce discharges of oil and grease;
  • If the Superintendent determines that a user subject to the alternative limit has caused, alone or in conjunction with other discharges, obstruction, interference, or pass through, then the user shall comply with the total oil and grease limitation or another appropriate limitation established by the Utility in the user’s IWP; and
  • Any other appropriate conditions set forth in the user’s SIU.
2.4 National Categorical Pretreatment Standards

The categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 - 471 are hereby incorporated.

A. Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Superintendent may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).

B. When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the Superintendent shall impose an alternate limit using the combined waste stream formula in 40 CFR 403.6 (e).

C. A user may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 CFR 403.12, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.

D. A user may obtain a net gross adjustment to a categorical standard in according with 40 CFR 403.15.

2.3 Abnormal Waste Surcharge – Grissom Aeroplex POTW

A. Any customer discharging abnormal industrial wastes to the public sanitary sewerage system having an average total suspended solids (TSS) content in excess of 300 mg/l and/or an average of five (5) day BOD in excess of 300 mg/l, and /or an average COD in excess of 400 mg/l, and/or and average Oils & Grease concentration of 100 mg/l, and/or an average ammonia-nitrogen level in excess of 25 mg/l, the customer shall pay a surcharge based upon the excess strength of his wastes.

B. Discharges exceeding a maximum daily limit of Fats and Oils and Greases of 100 mg/l, shall be subject to fines.

C. The costs of treatment for each pound of BOD, suspended solids, Oil & Grease and ammonia-nitrogen removed by each treatment works shall be reviewed by the Utility Service Board at the end of each fiscal year. If a discrepancy exists between the actual costs as found by the Board and the estimated costs, the Approving Authority shall increase or decrease the surcharge rates sufficiently to cover only the projected actual costs for the ensuing year.

D. No reduction in sewerage service charges, fees, or taxes will be permitted because of the fact that certain industrial wastes discharged to the public sanitary sewerage system contain less than the surcharge level.

2.2 Abnormal Waste Surcharge – Peru POTW

A. Any customer discharging abnormal industrial wastes to the public sanitary sewage system having an average total suspended solids (TSS) content in excess of 250 mg/l and/or an average of five (5) day BOD in excess of 200 mg/l, and /or an average COD in excess of 400 mg/l, and/or and average Oils & Grease concentration of 100 mg/l, and/or an average ammonia-nitrogen level in excess of 25 mg/l, and/or flows in excess of permitted levels, then the customer shall pay a surcharge based upon the excess strength of his wastes.

B. Discharges exceeding a maximum daily limit of Fats and Oils and Greases of 100 mg/l, shall be subject to fines.

C. The costs of treatment for each pound of BOD, suspended solids, Oil & Grease and ammonia-nitrogen removed by each treatment works shall be reviewed by the Utility Service Board at the end of each fiscal year. If a discrepancy exists between the actual costs as found by the Board and the estimated costs, the Approving Authority shall increase or decrease the surcharge rates sufficiently to cover only the projected actual costs for the ensuing year.

D. No reduction in sewerage service charges, fees, or taxes will be permitted because of the fact that certain industrial wastes discharged to the public sanitary sewerage system contain less than the surcharge level.

2.1 Prohibited Discharge Standards

A. General Prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass-through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other National, State, or local pretreatment standards or requirements. It is acknowledged that certain contracts may exist which may be in partial conflict with this ordinance and in those cases the contract shall govern provided that NPDES compliance is not jeopardized.

B. Specific Prohibitions - Peru POTW. No user shall introduce or cause to be introduced into the Peru POTW the following pollutants, substances, or wastewater:

  1. Pollutants which create a fire or explosive hazard in the collection system or POTW, including, but not limited to, waste streams with a closed-cup flashpoint of less that 140°F (60°C) using the test methods specified in 40 CFR 261.21;
  2. Wastewater having a pH less than 6.0 or more than 10.5, or otherwise causing corrosive structural damage to the POTW or equipment;
  3. Any solid or viscous substances in amounts which will cause obstructions of the flow in the collection system or at the POTW resulting in interference.
  4. 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 with the POTW
  5. Wastewater having a temperature greater than 130°F (54.4°C), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C).
  6. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
  7. Any water or waste containing fats, wax, grease or oils, whether emulsified or no, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32°F and 150°F.
  8. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW sewers including in a quantity that may cause acute worker health and safety problems. 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;
  9. Trucked or hauled pollutants, except at discharge points designated by the Superintendent in accordance with Section 3.4 or this ordinance;
  10. 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 impart color to the treatment plant’s effluent, thereby violating the POTW NPDES Permit;
  11. Wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations;
  12. Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Superintendent;
  13. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
  14. Medical wastes, except as specifically authorized by the Superintendent in a wastewater discharge permit;
  15. Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test;
  16. Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW or in the receiving stream;
  17. Instantaneous flows and loadings which are in excess of the capacity of the treatment facilities or are likely to cause overflow conditions are prohibited.

Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.

C. Specific Prohibitions - Grissom POTW. No user shall introduce or cause to be introduced into the Grissom POTW the following pollutants, substances, or wastewater:

  1. Pollutants which create a fire or explosive hazard in the collection system or POTW, including, but not limited to, waste streams with a closed-cup flashpoint of less that 140°F (60°C) using the test methods specified in 40 CFR 261.21;
  2. Wastewater having a pH less than 6.0 or more than 10.5, or otherwise causing corrosive structural damage to the POTW or equipment;
  3. Any solid or viscous substances in amounts which will cause obstructions of the flow in the collection system or at the POTW resulting in interference.
  4. 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 with the POTW.
  5. Wastewater having a temperature greater than 130°F (54.4°C), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C).
  6. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
  7. Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32°F and 150°F.
  8. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW sewers including in a quantity that may cause acute worker health and safety problems. 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;
  9. Trucked or hauled pollutants, except at discharge points designated by the Superintendent in accordance with Section 3.4 or this ordinance;
  10. 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 impart color to the treatment plant’s effluent, thereby violating the POTW NPDES Permit;
  11. Wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations;
  12. Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Superintendent;
  13. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
  14. Medical wastes, except as specifically authorized by the Superintendent in a wastewater discharge permit;
  15. Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test;
  16. Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW or in the receiving stream;
  17. Instantaneous flows and loadings which are in excess of the capacity of the treatment facilities or are likely to cause overflow conditions are prohibited.

Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.