(a) The City shall develop and update (as necessary) local requirements and limitations with respect to discharges to the POTW. Such requirements and limitations are developed as necessary to comply with the objectives set forth in Section 924.01 and/or to enable the City to comply with the limits of its NPDES permit. Where local, state or federal standards apply to the same pollutant, the Discharger shall comply with the most stringent requirement.
(1) Local Limits. The approved pretreatment program for the City of Warren sets wastewater discharge limitations for Industrial Users discharging to the City sewer system. These local limits are available at https://warren.org/living/departments/water-pollution-control or by contacting the Director.
A. Significant Industrial Users. Such limits shall be specified in the Industrial Wastewater Discharge permit issued by the City.
B. Dischargers Other Than Significant Industrial Users. Discharges from these Industrial Users shall not exceed the generally accepted pollutant screening levels, without receiving either from the City;
2. Written permission to discharge without an industrial wastewater discharge permit.
C. Local requirements and limitations on discharges to the POTW shall be met by all Dischargers subject to these standards. Where a pollutant is subject to local limits and state/federal pretreatment standards (e.g. Categorical Pretreatment Standards), the most stringent of these limits shall apply.
D. The City may develop Best Management Practices (BMPs), as defined in Section 924.02, by ordinance or in industrial wastewater discharge permits, to implement local limits and the requirements of this chapter.
(2) Surcharge Thresholds. No wastewater shall be discharged which exceeds the maximum daily concentration established for the following compatible pollutants without permission from the Director and payment of the appropriate surcharge, found in Chapter 925:
Pollutant | Maximum Daily Concentration (mg/L) |
CBOD | 200 |
COD | 600 |
Ammonia nitrogen | 35 |
Total Phosphorus | 15 |
Solids (total suspended) | 250 |
(Ord. 12966/2020. Passed 10-14-20.)