The Town and, specifically, the WWTP Superintendent shall have the legal authority to develop and enforce specific limits on prohibited substances as defined herein and as needed.
(A) The following values are daily maximum limits in effect at the point of connection with the collection system. At no time may these limitations be exceeded without prior authorization in writing from the Superintendent of the Town POTW. All concentrations for metallic substances are for “total” metal unless indicated otherwise. The Superintendent may impose mass limitations in addition to or in place of the concentration-based limitations below. In cases where a facility is subject to more than one (1) limit for a specific parameter (i.e., federal categorical standards and local limits), the more stringent limit applies.
Parameter
|
Daily Maximum Limit (mg/l)
|
Limiting Criteria
|
Parameter
|
Daily Maximum Limit (mg/l)
|
Limiting Criteria
|
Cadmium | 0.07 | Technology-based Limit |
Chromium | 1.71 | Technology-based Limit |
Copper | 0.75 | NPDES Monthly Limit |
Cyanide | 0.02 | Limit of Quantization |
Lead | 0.22 | NPDES Monthly Limit |
Mercury | 0.000020 | NPDES Monthly Limit |
Nickel | 1.58 | NPDES Monthly Limit |
Silver | 0.56 | NPDES Monthly Limit |
Zinc | 1.48 | Technology-based Limit |
(B) The following are the applicable compatible pollutant discharge limits for substances that are compatible with the treatment processes of the POTW, but that could, when discharged in excessive amounts, cause excessive treatment costs (surcharge discharge limits) or limit the effectiveness of the POTW (prohibited discharge limits). The following values are daily maximum limits in effect at the point of connection with the collection system. At no time may the prohibited discharge limitations be exceeded without prior authorization in writing from the Superintendent of the Town POTW. Discharges found in excess of the surcharge discharge limit concentrations shall be subject to surcharge fees as outlined in § 52.71(C) of this chapter. In cases where a facility is subject to more than one (1) limit for a specific parameter (i.e., federal categorical standards and local limits), the more stringent limit applies.
Surcharge Discharge Limits | ||
Parameter | Daily Maximum Limit (mg/l)
|
Limiting Criteria
|
Surcharge Discharge Limits | ||
Parameter | Daily Maximum Limit (mg/l)
|
Limiting Criteria
|
cBOD5 | 200 | WWTP Average Design Capacity |
TSS | 200 | WWTP Average Design Capacity |
NH3-N | 15 | WWTP Average Design Capacity |
Prohibited Discharge Limits | ||
Parameter | Daily Maximum Limit (mg/l)
|
Limiting Criteria
|
cBOD5 | 1,126 | NPDES Monthly Limit |
TSS | 1,632 | NPDES Monthly Limit |
(Ord. 2004-11, passed 6-10-04; Am. Ord. 2011-06, passed 3-24-11)