14.60.3195 pH effluent limitations under continuous monitoring.
A. Where a permittee continuously monitors the pH of wastewater discharged to the city’s sewer system pursuant to a requirement in their discharge permit, the permittee shall maintain the pH of such wastewater within the range set forth in the permit, except excursions from the range are permitted subject to the following limitations:
1. The total time during which the pH values are outside the required range of pH values shall not exceed two hours in any calendar month; and
2. No individual excursion from the allowable range of pH values shall exceed 15 minutes.
B. At no time will the pH value be outside the allowable range of pH values by more than one pH unit.
C. At no time shall the pH be less than five pH units nor more than 11 pH units.
D. All batch discharges shall be in compliance with the allowable pH range.
E. For the purposes of this chapter, an excursion is an unintentional and temporary incident in which the pH value of the discharged wastewater exceeds the range set forth in the user’s discharge permit.
F. Temporary pH value excursions that comply with the provisions of this section will not be considered violations of the user’s discharge permit but shall be reported in the pretreatment self-monitoring report with copies of the associated pH recorder charts. (Ord. 3220 § 2, 2016; Ord. 2742 § 2, 2008)