(b) National Categorical Pretreatment Standards. National categorical pretreatment standards, as promulgated by the U.S. Environmental Protection Agency pursuant to the Act, shall be met by all dischargers. New sources shall install and "start up" all pollution control equipment required to meet applicable national categorical pretreatment standards before beginning to discharge and must, within the shortest feasible time (not to exceed ninety days), meet all applicable national categorical pretreatment standards. An application for modification of the national categorical pretreatment standards may be considered for submittal to the Regional Administrator by the City when the City's wastewater treatment system achieves consistent removal of the pollutants as defined by 40 C.F.R. 403.7.
(c) State Requirements. State requirements and limitations on discharges to the POTW shall be met by all dischargers who are subject to such standards in any instance in which such State standards are more stringent than Federal requirements and limitations or those in this chapter or in any other applicable ordinance.
(d) Dilution. No discharger shall increase the use of potable or process water in any way 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. This shall not prohibit the use of equalization tanks utilized to regulate flows.
(e) Supplementary Limitations. No discharger shall discharge wastewater containing concentrations of the following enumerated materials, exceeding the following values:
Material | Concentration (mg/l)(C) |
Arsenic | 0.09 |
Cadmium | 0.5 |
Chromium (Total) | 1.0 |
Chromium (Hexavalent) | 0.78 |
Copper | 0.66 |
Cyanide (Total) | 0.21 |
Lead | 0.85 |
Mercury | 0.001 |
Molybdenum | 88.3 |
Nickel | 1.0 |
Selenium | 117.8 |
Silver | 1.0 |
Zinc | 1.0 |
Mass limitations on dischargers are intended to prevent the use of dilution to meet the pretreatment standards or requirements of this chapter, or in other cases where the imposition of mass limitations is deemed appropriate by the City.
No statement contained in this chapter shall be construed as prohibiting any special agreement or arrangement between the City and any person whereby an industrial waste of unusual strength or character may be admitted to the sewage disposal works, either before or after pretreatment, provided that there is no impairment of the functioning of the sewage disposal works by reason of the admission of such wastes and that no extra costs are incurred by the City without recompense by such person. However, no special arrangement or agreement between the City and any person shall authorize a violation of any Federal regulation or standard.
(Ord. 2015-160. Passed 9-8-15.)
(Ord. 2015-160. Passed 9-8-15.)