N.J. Admin. Code § 7:14A-13.6

Current through Register Vol. 56, No. 19, October 7, 2024

Section 7:14A-13.6 - Calculation of water quality based limitations

(a) When the Department determines pursuant to 7:14A-13.5 that a discharge causes, has the reasonable potential to cause, or contributes to an excursion above a Surface Water Quality Standard, a water quality based effluent limitation for each pollutant or pollutant parameter including WET, shall be determined in accordance with the USEPA TSD, as amended and/or supplemented, unless the permittee demonstrates that none of the methods in the TSD are applicable and that an alternative method will result in a water quality based effluent limitation that ensures compliance with the Surface Water Quality Standards.

(b) Water quality based effluent limitations for CPOs may be adjusted to address chlorine demand when the Department determines that such an adjustment is appropriate after review of additional information submitted in accordance with 7:14A-4.3(e). The adjustment for chlorine demand shall be applied only within the approved regulatory mixing zone as defined in the Surface Water Quality Standards at N.J.A.C. 7:9B.

(c) Unless a metal translator is developed based on a site-specific water quality study or approved by USEPA as part of a watershed study or TMDL, the following metal translator values* shall be used to develop total recoverable effluent limitations from dissolved metal criteria:

Name of the	Freshwater	Freshwater	Saline	Saline
Metal	Acute	Chronic	Acute	Chronic
1.	Arsenic	1.0	1.0	1.0	1.0
2.	Cadmium	0.651	0.651	0.994	0.994
3.	Chromium III	0.277	0.277	N/A	N/A
4.	Chromium VI	0.919	0.919	0.993	0.993
5.	Copper	0.908	0.908	0.83	0.83
6.	Lead	0.723	0.723	0.951	0.951
7.	Mercury	0.85	0.85	0.85	0.85
8.	Nickel	0.846	0.846	0.990	0.990
9.	Selenium	N/A	N/A	0.998	0.998
10.	Silver	0.85	N/A	0.85	N/A
11.	Zinc	0.950	0.950	0.946	0.946

*Metal Translator Value equals the ratio of the Dissolved Metal Concentration to the Total Recoverable Metal Concentration.

N/A Not applicable

(d) Whole effluent toxicity test species selection criteria are as follows:

1. The objective of the Department is to use test species for whole effluent toxicity testing that are representative of the more sensitive aquatic biota from the different trophic levels of the waters in question.

2. Test species need not be indigenous to, nor occur in the waters in question.

3. The Department shall designate the approved representative species considered to be the most sensitive to the discharge.

N.J. Admin. Code § 7:14A-13.6

Amended by R.2009 d.7, effective 1/5/2009.
See: 40 N.J.R. 1478(a), 41 N.J.R. 142(a).
Added (b).
Amended by R.2009 d.372, effective 12/21/2009.
See: 41 N.J.R. 1565(a), 41 N.J.R. 4735(a).
Added (c) and (d).