Current through Register Vol. 56, No. 18, September 16, 2024
(a) For direct
discharges to surface water for which BOD[5] or CBOD[5] water quality based effluent
limitations based upon water quality studies acceptable to the Department have not
been developed but are required under
N.J.A.C.
7:9B-1.5 or 1.6, the minimum treatment
requirements for BOD[5] specified in (b) below shall apply except when more
stringent effluent limitations are required by:
1.
Section 301 or 306 of the Federal Act;
2. The Delaware River Basin Commission or the
Interstate Environmental Commission, as applicable.
(b) The minimum BOD[5] treatment requirements are
as listed in the following table:
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here to view image.
(c) In applying the minimum treatment requirements
contained in (b) above, the following substitutions may be made:
1. For industrial treatment works, TOC or COD may
be substituted for BOD[5] when a long-term BOD[5]:COD or BOD[5]:TOC correlation has
been demonstrated. In the absence of data to establish a long term correlation, the
BOD[5]:COD ratio shall be assumed to be 1:2 and the BOD[5]:TOC ratio shall be
assumed to be 1:1. If subsequent data are submitted which indicate that a different
BOD[5]:COD or BOD[5]:TOC ratio would be more appropriate, a written request shall be
submitted to the Department; and
2. For
industrial or domestic treatment works, CBOD[5] may be substituted for BOD[5] as
follows:
i. With prior approval of each regulatory
agency with jurisdiction over the discharge, when applicable, if the effluent
standard for BOD[5] is 30/45 mg/L, a CBOD[5] effluent standard of 25/40 mg/L, as
allowed for in N.J.A.C. 7:14A-12.2(c)1
and 2, may be substituted; or
ii. With prior approval of each regulatory agency
with jurisdiction over the discharge, when applicable, if the effluent standard for
BOD[5] is other than 30/45 mg/L, CBOD[5] may be substituted for BOD[5] when a long
term BOD[5]:CBOD[5] correlation has been demonstrated. When a request for a
substitution of CBOD[5] for BOD[5] is made, the applicant shall submit data
demonstrating the appropriate BOD[5]:CBOD[5] correlation. The correlation
demonstration shall consist of a minimum of 12 BOD[5] and CBOD[5] analyses of split
samples obtained at a frequency of twice per month, subject to the following
restrictions:
(1) For limitations applicable year
round, or for limitations applicable during warm weather (for example, May through
October), the samples shall be obtained during the months of May through
October.
(2) For limitations applicable
during cold weather (for example, November through April), the samples shall be
obtained during the months of November through April.
(3) The monthly and weekly BOD[5] effluent
limitations shall be recalculated as CBOD[5] monthly and weekly effluent limitations
using the approved correlation factor.
(d) Direct discharges to surface water from
industrial treatment works shall be exempt from the minimum BOD[5] effluent
standards in (b) above, when:
i. Statistically
valid data indicate that the maximum projected BOD[5] concentration is consistently
below the applicable effluent standard; or
ii. The Department determines that, based on
wastewater generating activities, no potential exists for the discharge to add
BOD[5], COD or TOC.
