(A) (1) It is unlawful for an industrial discharger to discharge wastewater containing any pollutant which exceeds the concentration limits set forth below, or the limits in 40 CFR § 403.5(c), as it may be amended, whichever is more stringent:
(a) BOD-5 day: 600.00 mg/l.
(b) COD: 1,100.00 mg/l.
(c) S.S.: 800.00 mg/l.
(d) Oil and grease: 50.00 mg/l.
(e) Chloride: 110.00 mg/l.
(f) Arsenic: 3.00 mg/l.
(g) Ammonia: 30.00 mg/l.
(h) Cadmium: 1.00 mg/l.
(i) Chromium (total): 2.30 mg/l.
(j) Copper: 1.30 mg/l.
(k) Lead: 3.10 mg/l.
(l) Mercury: 0.01 mg/l.
(m) Nickel: 1.10 mg/l.
(n) Silver: 1.00 mg/l.
(o) Sulfide (dissolved): 0.10 mg/l.
(p) Zinc: 10.00 mg/l.
(q) Cyanide (total): 3.00 mg/l.
(r) TDS: 2,000.00 mg/l.
(2) Any exceedance of any of the foregoing limits, as they may be amended, is a violation of this chapter and subjects the user to enforcement action. Concentration limits apply at the point of discharge to the sewer system. Concentrations for metallic substances are for "total" metal.
(B) When the Director determines that the user is contributing to the city's sewer system any of the above enumerated substances in amounts in excess of these limitations, the Director must notify the user(s) of the violation.
(C) National Categorical Pretreatment Standards (40 CFR Chapter 1, Chapter N, Parts 405-471):
(1) Specific industrial subcategory discharges - pollutants or pollutant properties discharged to a city sewer system by existing or new industrial users in specific Industrial subcategories must be in addition to all applicable pretreatment standards and requirements.
(2) Within 60 days after the effective date of a pretreatment standard for a subcategory under which an industrial user may be included, the industrial user may request written certification on whether the industrial user falls within that particular subcategory.
(3) If an existing industrial user adds or changes a process or operation which may be included in a subcategory, the existing industrial user must request certification before commencing discharge from the added or changed processes or operation.
(4) A new source must request this certification before commencing discharge. See 40 CFR § 403.6.
(5) Indirect dischargers subject to the national categorical standards must comply with those standards in addition to 40 CFR § 403.6.
(6) If the Public Works Director determines it is necessary, any industrial user they may be required to implement measures to limit the possibility slug discharges from their facility. These control measures shall be contained in a slug discharge control plan developed by the industrial user and submitted to the Public Works Director.
(D) As provided in 40 CFR § 403.3, the Public Works Director may determine that an industrial user subject to Categorical Pretreatment Standards under § 403.6 and 40 CFR Chapter 1, Subchapter N is a non-significant categorical industrial user rather than a significant industrial user on a finding that the industrial user never discharges more than 100 gallons per day (gpd) of total categorical wastewater (excluding sanitary, non-contact cooling and boiler blowdown wastewater, unless specifically included in the pretreatment standard) and the other provisions of 40 CFR.
(E) Any industrial permit is in significant noncompliance if its violation meets one or more of the following criteria:
(1) Chronic violations of wastewater discharge limits, defined here as those in which 66% or more of all of the measurements taken for the same pollutant parameter during a six-month period exceed (by any magnitude) a numeric pretreatment standard or requirement, including instantaneous limits, as defined by 40 CFR § 403.3(l);
(2) Technical review criteria (TRC) violations, defined here as those in which 33% or more of all of the measurements taken for the same pollutant parameter during a six-month period equal or exceed the product of the numeric pretreatment standard or requirement including instantaneous limits, as defined by 40 CFR § 403.3(l) multiplied by the applicable TRC (TRC=1.4 for BOD, TSS, fats, oil, and grease, and 1.2 for all other pollutants except pH);
(3) Any other violation of a pretreatment standard or requirement as defined by 40 CFR § 403.3(l) (daily maximum, long-term average, instantaneous limit, or narrative standard) that the POTW determines has caused, alone or in combination with other discharges, interference or pass through (including endangering the health of POTW personnel or the general public).
(Ord. 1093, passed 2-17-04; Am. Ord. 1250, passed 5-20-13) Penalty, see § 51.999