A. The city has developed numeric limits for the pollutants listed in Table 15.14.023. Pollutants for which no numeric limits are provided may be considered in the future. The director may set limits for other pollutants not listed below and, if so, shall provide public notice and an opportunity to respond/comment to interested parties pursuant to 40 CFR 403.5(c)(3).

B. A user shall not discharge or allow the discharge to the POTW of wastewater containing the following individually identified specific pollutants in concentrations, solutions, or suspensions that exceed the following (instantaneous) limits:

C. The director may impose mass limitations in addition to (or in place of) the concentration-based limits in Table 15.14.023.

D. The local limits in Table 15.14.023 apply immediately downstream from pretreatment facilities if such exist or immediately downstream from the regulated or manufacturing process if no pretreatment exists or as determined by the city and/or contained in the user’s discharge permit.

E. Users discharging pollutants in excess of the concentration limits in Table 15.14.023 are in violation of this chapter, unless they have a wastewater discharge permit which defines the limitation differently based on a nonuniform distribution approach or mass limit. Such users may be subject to surcharges as established by the director.

F. All concentrations for metallic substances indicated in Table 15.14.023 are for “total” metal unless indicated otherwise. The director may impose mass limitations in addition to (or in place of) the concentration-based limitations indicated in Table 15.14.023.

G. Local limits are subject to review and update per the conditions in 40 CFR 403.5(c)(1).

H. Where a user is subject to a categorical pretreatment standard and a local limit for a given pollutant, the more stringent provision shall control.

I. Total Toxic Organics. A person may not discharge or allow the discharge of wastewater containing total toxic organics as listed in 40 CFR 433.11(e), 469.22 and 469.26 to the POTW in excess of an instantaneous maximum allowable limit of 2.0 milligrams per liter.

J. Compliance Determination – Assignment of Limits. The director may determine compliance with the local limits or the total toxic organics based on the analysis of:

K. If necessary to protect the POTW, the director may issue a permit, order, or rule that assigns the local limits or the total toxic organics limit as:

L. Users shall be subject to “instantaneous limits” (determined by grab sample) equal to or twice the “daily maximum” concentration established in Table 15.14.023 for any pollutant for which a composite sample is required in a permit. This provision is inapplicable to users without permits or without the permit requirement to collect a composite sample for the analyte in question.

M. The director shall use the individual wastewater discharge approval process to establish ceiling limits for compatible pollutants and appropriate discharge limits for all other pollutants not listed in this section. This includes, but is not limited to, pollutants subject to regulation under the Resource Conservation and Recovery Act, volatile or semi-volatile organics, halogenated or brominated compounds, aromatic hydrocarbons, polymers, surfactants, and pesticides.

N. The director may establish and require best management practices (BMPs) for any category of user or type of industrial process which creates a nondomestic waste stream. Such requirements may be applied either in lieu of or in addition to the local limits of this section. BMPs may also include alternative limits which may be applied at the end of a specific process or treatment step instead of at the combined effluent. [Ord. 2020-07-016 § 1; Ord. 2019-11-032 § 1].