NC0051969_Permit (Correction)_20170426

Permit NCO051969
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15 NCAC 02B .0400 et seq., 02B .0500 et seq.]
Beginning on the effective date of this permit and lasting until expiration, the permittee is authorized to
discharge a combined treated ion -exchange filter backwash, and treated 100% domestic wastewater
from Outfall 001. Such discharges shall be limited, monitored and reported 1 by the permittee as
specified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARATERISTICS
Monthly
Daily
Measurement
Sample
Sample
(PARAMETER CODE)
Average
Maximum
Frequency
Type
Location 2
Flow
50050
0.012 MGD
Weekly
Instant
E
TRC 3
50060
17.0 µg/L
2/Week
Grab
E
pH
00400
Not < 6.0 or > 9.0 s.u.
Weekly
Grab
E
BOD, 5-day (20°C)
CO310
5.0 mg/L
7.5 mg/L
Weekly
Grab
E
(01Apr-31Oct)
BOD, 5-day (20°C)
CO310
10.0 mg/L
15.0 mg/L
Weekly
Grab
E
(O 1Nov-31 Mar)
Total Suspended Solids
00530
30.0 mg/L
45.0 mg/L
Weekly
Grab
E
s a
NH3 as
NH3 N
CO610
2.0 mg/L
10.0 mg/L
Weekly
Grab
E
— 31 Oct)
(OlNH3
as N
CO610
4.0 mg/L
20.0 mg/L
Weekly
Grab
E
(OlNov — 31Mar)
Total Copper 4
01040
7.88 µg/L
10.47 µg/L
Weekly
Grab
E
Chloride 4
00940
230 mg/L
Weekly
Grab
E
Fecal Coliform
31616
200/100 nil
400/100 nil
Weekly
Grab
E
(geometric mean)
Fecal Coliform
(geometric mean)
31616
Monitor & Report
Weekly
Grab
U, D
Temperature (°C)
00010
Monitor & Report
Weekly
Grab
E, U, D
Dissolved Oxygen
00300
Effluent: not < 5.0 mg/L
Weekly
Grab
E, U, D
Conductivity
00094
Monitor & Report
Monthly
Grab
E, U, D
Salinity
00480
Monitor & Report
Monthly
Grab
E, U, D
Total Hardness
00900
Monitor & Report
Monthly
Grab
E, U
[as CaCO3 or Ca + Mg]
Turbidity
00070
Monitor & Report
Monthly
Grab
E
Total Dissolved Solids
70295
Monitor & Report
Quarterly
Grab
E
Total Zinc
01090
Monitor & Report
Quarterly
Grab
E
Total Fluoride
00950
Monitor & Report
Quarterly
Grab
E
Chronic Whole Effluent
g
TGP3B
Quarterly
Grab
E
Toxicity (WET)
See Footnotes next rage.
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Permit NCO051969
Table A. f 1.) Footnotes:
1. Electronic reporting (eDMR) is required using DWR's eDMR reporting system [see A. (3.)].
2. E = Effluent; U = Upstream — 50 feet above outfall; D = Downstream — 0.5 miles downstream of
outfall.
3. Total Residual Chlorine (TRC) limit and monitoring apply only if the Permittee uses chlorine or a
chlorine derivative to disinfect. The Division shall consider compliant all TRC values reported
below 50 µg/L. However, the Permittee shall continue to record and submit all values reported by a
North Carolina -certified test method, even if these values fall below 50 µg/L.
4. Compliance to permit limits begin on March 1, 2019, two (2) years from the permit Effective Date.
5. Chronic WET -Testing [THP3B] Pass/Fail using Ceriodaphnia dubia; effluent concentration at 90%,
during the months of January, April, July and October [see A. (2.)].
Condition
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (2.) CHRONIC TOXICITY - Limited (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent versions
or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 2010) or
subsequent versions. The tests will be performed during the months of January, April, July and October.
These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent
sampling for this testing must be obtained during representative effluent discharge and shall be performed at the
NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase H Chronic Whole Effluent Toxicity Test
Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP313 for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
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