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Title 13
Chapter 13.03A
Section 13.03A.0204
 

Title 13 Public Utilities and Services

Chapter 13.03A Pretreatment

Article II. General Requirements

Section 13.03A.0204 Local Limits [2.4]
  1. The following limits are established as local limits, expressed as Maximum Allowable Discharge Limits. No Significant Industrial User may discharge wastewater into the POTW in excess of the following concentrations:
  1. Arsenic: 0.12 mg/L.
  1. Benzene: <0.5 mg/L
  1. Cadmium: 0.093 mg/L.
  1. Total Chromium: <5.0 mg/L.
  1. Copper: 0.74 mg/L.
  1. Cyanide: 1.01 mg/L.
  1. Fats, oils, and, grease: See SMC 13.03A.0201(B)(19).
  1. Lead: 0.32 mg/L.
  1. Mercury: 0.012 mg/L.
  1. Nickel: 1.74 mg/L.
  1. Silver: 0.46 mg/L.
  1. Zinc: 2.59 mg/L.
  1. The pH limit set in SMC 13.03A.0201(B)(2) may also be enforced as a local limit.
  1. Molybdenum: 0.66 mg/L.
  1. Selenium: 0.40 mg/L.
  1. Users that discharge wastewater into any sewer that conveys wastewater to Spokane County Regional Water Reclamation Facility must comply with the limits set forth in Spokane County Code Chapter 8.03A 0204.
  1. All concentrations for metallic substances are for “total” metal unless indicated otherwise. The superintendent may impose mass limitations in addition to or in place of the concentration-based limitations shown in subsection (A) of this section. Where a user is subject to a categorical pretreatment standard and a local limit for a given pollutant, the more stringent limit applies as the applicable pretreatment standard.
  1. Limits may be established for all users, groups, or specific users. They may be designed to ameliorate temporary or permanent discharge characteristics, or to accommodate any new or special temporary or permanent condition of the POTW, its effluent receiving water, or other environmental problem. The superintendent may set limits as instantaneous maximums or for other durations (e.g., daily maximum or monthly average limits) where deemed proper.
  1. Whenever determined appropriate, the superintendent may develop best management practices (BMPs) for general application, in individual discharge permits or general discharge permits, to implement local limits and the requirements of article II of this chapter and require documentation of compliance. Failure to follow such requirements is a violation of this chapter.

NOTE: Bracketed enumerations reference the numbering in the EPA Region 10 Model

Date Passed: Monday, December 16, 2019

Effective Date: Sunday, January 26, 2020

ORD C35864 Section 1