(A) The Superintendent is authorized to establish local limits pursuant to 40 CFR 403.5(c).
(B) The following pollutant limitations are established to protect against pass through and interference. No user shall discharge wastewater containing pollutants concentrations in excess of the following daily maximum concentrations. Wastewater concentration shall be determined by the analysis of samples collected and analyzed in accordance with 40 CFR 136. Except for the cyanide, oil and grease, phenols, and total toxic organics, (TTO), 24 hour composite samples proportioned by either time or flow shall be analyzed to determine pollutant concentrations. Grab samples will be used for the analysis of cyanide, oil and grease, phenols, and TTO’s. Results shall not exceed the following noted limitations:
32.51 mg/l | Arsenic |
0.2947 mg/l | Cadmium |
78.14 mg/l | Total Chromium |
1.692 mg/l | Hexavalent Chromium |
0.915 mg/l | Molybdenum |
5.074 mg/l | Copper |
0.9 mg/l | Cyanide (total) |
200 mg/l | Total oil and grease (FOG, polar and non-polar) |
100 mg/l | Non-polar oil and grease (mineral or petroleum origin) |
1.369 mg/l | Lead (total) |
0.0015 mg/l | Mercury |
25.20 mg/l | Nickel |
5.928 mg/l | Selenium |
TBD mg/l | Phenolic compounds that cannot be removed by the POTW |
25.0 mg/l | Phosphorus |
2.01 mg/l | Silver |
2.14 mg/l | TTO (total toxic organics) |
19.48 mg/l | Zinc (total) |
(C) The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for “total” recoverable metal unless indicated otherwise. The Superintendent may impose mass limitations that are equivalent to the concentration-based limitations above.
(D) Upon the promulgation of the National Categorical Pretreatment Standard (NCPS) for a particular user, that standard, if more stringent than the limitations imposed under this Section for sources in that category, shall, when effective, immediately supersede the limitations and conditions imposed under this chapter. The Superintendent shall notify all known affected users of the applicable permitting and reporting requirements under 40 CFR 403.12.
(Ord. 06-2017, passed 5-22-2017)