N.J. Admin. Code § 7:14A-13.15 - Permit averaging periods
(a) Permit
averaging periods for continuous discharges shall be determined as follows:
1. Limitations on industrial treatment works
for conventional, non-conventional, and toxic pollutants shall, unless
impracticable, be stated as maximum daily and average monthly discharge
limitations;
2. Limitations for
conventional and non-conventional pollutants discharged from a DTW shall,
unless impracticable, be stated as average weekly and average monthly discharge
limitations. Limitations on toxic pollutants discharged from a DTW shall,
unless impracticable, be stated as maximum daily and average monthly discharge
limitations;
3. Limitations on any
pollutant or pollutant parameter where the monitoring frequency is once per
month or less may be stated as a maximum daily limitation. Average monthly
limitations may also be included on a site specific basis if the Department
determines that such limitations are necessary to adequately regulate the
discharge of pollutants from the facility;
4. For whole effluent toxicity where the
effluent monitoring frequency is once per month or less, the maximum daily
effluent limitation shall be stated as the No Observed Adverse Effect
Concentration or minimum LC[50] (for acute whole effluent toxicity) or minimum
IC[25] (for chronic whole effluent toxicity) and as a maximum acute or chronic
toxic units. Average monthly limitations may also be included on a site
specific basis if the Department determines that such limitations are necessary
to adequately regulate the discharge of pollutants from the facility;
5. For limitations other than water quality
based limitations which may be imposed on DTWs, where the average weekly
limitation is calculated from the average monthly limitation, or the reverse,
the Department may use a factor of 1.5 to calculate the average weekly
limitation from the average monthly limitation or, alternatively, may, at the
request of the applicant, use the statistical procedures at
7:14A-13.6 to determine the
appropriate average weekly limitation; and
6. For intermittent flows, the maximum
limitation shall be applicable during periods of actual discharge.
Notes
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