§ 51.012 LOCAL LIMITATIONS.
   (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)