(A) An industrial waste survey is required prior to a user discharging wastewater containing in excess of the following instantaneous maximum allowable discharge limits:
Arsenic | 0.003 mg/l |
BOD | 250 mg/l |
Cadmium | 0.003 mg/l |
Chromium | 0.05 mg/l |
Copper | 0.061 mg/l |
Cyanide | 0.041 mg/l |
Lead | 0.049 mg/l |
Mercury | 0.0003 mg/l |
Nickel | 0.021 mg/l |
Silver | 0.005 mg/l |
TKN | 40 mg/l |
TSS | 250 mg/l |
Zinc | 0.175 mg/l |
(B) Industrial waste survey information will be used to develop user-specific local limits when necessary to ensure that the POTW’s maximum allowable headworks loading is not exceeded for particular pollutants of concern. User-specific local limits for appropriate pollutants of concern shall be included in wastewater permits. The POTW Director may impose mass based limits in addition to or in place of concentration based limits.
(2003 Code, § 25-2.3)