(a) National Categorical Pretreatment Standards. National categorical pretreatment standards as promulgated by the U.S. Environmental Protection Agency (U.S. EPA) pursuant to the Act shall be met by all dischargers of the regulated industrial categories. An application for modification of the national categorical pretreatment standards may be considered for submittal to the Approval Authority by the Director, when the City's wastewater treatment system achieves consistent removal of the pollutants as defined by 40 CFR 403.7.
(b) Dilution. No discharger shall increase the use of potable or process water in any way, nor mix separate waste streams for the purpose of diluting a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the standards set forth in this chapter. The Director may impose mass limitations on dischargers which are using dilution to meet applicable pretreatment standards or requirements, or in other cases where the imposition of mass limitations is appropriate.
(c) Supplementary Limitations. No discharger shall discharge wastewater containing the following enumerated materials exceeding the following concentrations:
Material | Concentration (ppm) |
Fe (iron) | 5 |
Grease and oil of animal, vegetable and /or mineral origin | 100 |
(1) All Dischargers that discharge Priority Pollutants to the City are required to meet the Local Limit concentrations set forth in the most recent Technical Justification as approved by the Ohio Environmental Protection Agency.
(2) Any discharger not issued a permit by the Director shall not discharge any Priority Pollutant in concentrations greater than those normally found in residential and/or commercial wastewater in the City. If a discharger discharges any of the Priority Pollutants evaluated in current Technical Justification approved by the Ohio Environmental Protection Agency in concentrations exceeding background concentrations, the discharger shall submit a wastewater discharge permit application to the Director.
(3) The Director may develop Best Management Practices (BMPs), by ordinance or in individual wastewater discharge permits to implement Local Limits and the requirements of 933.05.
A. Grease, oil, and sand interceptors shall be provided when, in the opinion of the Director, they are necessary for the proper handling of wastewater containing excessive amounts of grease and oil, or sand. All interception units shall be of a type and capacity approved by the authority, shall be so located to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired by the discharger at their expense.
B. Mercury. The goal of the BMP plan is to maintain effluent concentrations of mercury at or below a calculated local limit. However, in no case will the permittee discharge mercury above the background concentration as stated above.
1. Within 12 months of notice to require a BMP the discharger shall develop a BMP plan and submit it to the Director for review and approval. The objective of this plan is to identify pollution prevention and wastewater reduction opportunities and to implement those opportunities that are technically and economically feasible. The plan shall include the following.
a. A list of members of a cross-functional team responsible for developing the BMP plan. This list shall include the name of a designated team leader.
b. An inventory of sources of pollutants subject to the BMP plan. The inventory shall include a description of each source and pollutant loading from each source. Also, included should be the identification of the facility's benchmark for each pollutant subject to the BMP plan.
c. Description of current and past BMPs and their effectiveness.
2. Identification of technical/economical evaluation of new BMPs. BMPs should include:
a. Substitution of materials; reformulation or redesign of products; modification of equipment, facilities, technology, processes, and procedures; and improvement in management, inventory control, materials handling or general operational phases of the facility.
b. A schedule for implementation of economically feasible BMPs.
c. Methods used for measuring progress towards the BMP goal and updating the BMP plan.
d. Monitoring requirements - The discharger shall monitor potential sources of mercury at least twice per year by grab at sample station(s).
3. Within 12 months of the effective date of an approved BMP and every year thereafter, the discharger shall submit an annual report to the City Administrator. The annual report shall include:
a. All BMP plan monitoring results for the year;
b. An updated inventory of sources of pollutants subject to the BMP plan;
c. A summary of effectiveness of all BMPs implemented to meet the BMP plan goal; and
d. Any updates to the BMP plan.
4. The BMP may be modified, or revoked and reissued, to revise or remove the requirements of this paragraph based on information collected under this paragraph.
(Ord. 4-2012. Passed 2-6-12.)