(A) A non-domestic waste survey is required prior to a user discharging wastewater containing parameters in excess of the following daily average discharge limits (based on a 24-hour composite sample or composite sample collected during the hours of operation and discharge):
Parameter | Concentration Limit, mg/l
|
Parameter | Concentration Limit, mg/l
|
CBOD5 | 250 |
TSS | 250 |
NH3-N | 15 |
COD | 500 |
Total Phosphorus | 4 |
Phenol | 1.2 |
Arsenic | 0.003 (must be below detection level of 0.005 mg/l) |
Cadmium | 0.003 |
Copper | 0.061 |
Cyanide | 0.015 |
Lead | 0.049 |
Mercury | 0.0003 |
Nickel | 0.021 |
Silver | 0.005 |
Total Chromium | 0.05 |
Zinc | 0.175 |
Oil and Grease | 100 |
Total Nitrogen | 40 |
(B) A non-domestic waste survey 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 limits in addition to, or in place of, concentration-based limits. Compliance with all parameters may be determined from a grab sample.
(C) The POTW Director will monitor for transmissivity and determine whether transmissivity limits should be included in the industrial user permits.
(Ord. 1994-79, passed 11-21-94; Am. Ord. 1995-57, passed 9-11-95; Am. Ord. 2001-10, passed 1-16-01; Am. Ord. 2007-45, passed 6-4-07)