NC0035173_Fact Sheet_20230214

DEQ / DWR / NPDES
FACT SHEET - NPDES PERMIT RENEWAL
NPDES General Permit COC NC0035173
Joe R. Corporon P.G., Compliance & Expedited Permitting Unit
14Feb2023
Table 1 - Facility Information
Applicant/Facility
Name
Wieland Copper Products, LLC
Wieland Copper Products, LLC
Applicant Address
3990 US 311 Hwy N., Pine Hall, NC 27042
Facility Address
3990 US 311 Hwy N., Pine Hall, NC 27042
Permitted Flow
(MGD)
renewal combining all discharges to either outfall => 0.025 MGD
Type of Waste
(MOD)
Combined 100%-domestic, boiler blowdown, and non -contact cooling water via
Outfall 001 - Outfall 003 (emergency only) to become dormant
Facility Class
WPCS WW-II
County
Stokes
Permit Status
Renewal
Regional Office
WSRO
Stream Characteristics
Receiving Stream
UT to Dan River
Stream Classification
WS-IV
Stream Segment
[22-(25.5)]
Drainage basin
' oanoke
Summer 7Q10 (cfs)
Outfall 003 = 0.0
Outfall 00 — !
Subbasin
[HUC]
l i2-01
[030101030306]
Winter 7Q10 (cfs)
Outfall 0.0
/0- a !01 1. 0
Use Support
Supporting
30Q2 (cfs)
303(d) Listed
Not listed
Average Flow (cfs)
State Grid
B18SE
IWC (%) 003 / 001
101' 34%
(flowr'i 0.02� ►
G )
USGS Topo Quad
Belews Lake, NC
FACILITY SUMMARY: Wieland Copper Products, LLC (Wieland) wastewater treatment facilities
consists of a 100%-domestic wastewater treatment [currently discharging to Outfall 001]. In addition,
Wieland discharges boiler blowdown, cooling tower blowdown and non -contact cooling water [via Outfall
003]. Domestic treatment consists of a bar screen, aeration basin, clarifier, tablet -type chlorinator, tablet -
type dechlorinator, and an aerobic digester.
RENEWAL / MODIFICATION REQUEST: Wieland proposes to transfer all future discharge to Outfall
001 and discontinue discharge and monitoring at Outfall 003 except in case of emergency (requires
notification to DWR and a subsequent report — see Permit Supplement to Cover Sheet). The request to
renew this permit was received by DWR on 2 1Apr2022, asking the following:
• Reroute effluent from the biological plant to the 100K [gallon]
storage tanks to be treated in the process water treatment plant
• Reroute discharge from process -water treatment plant to newly
installed copper removal resin system
• Install discharge to Outfall 001 from copper removal resin system
• Reclassify Outfall 003 as "inactive" for emergency discharge only.
Fact Sheet
Renewal Feb2023 -- NPDES Permit NC0035173
Page 1

Dormant Outfall 003 -- At the Permittee's request, this facility's wastes shall be finally plumbed such
that both outfalls (001 and 003) may discharge the sum of all wastes. Outfall 003 is hereby designated
dormant (no discharge) for emergency use only, as approved by WSRO. The Permittee shall document all
Emergencies, as required by the permit (see Supplement to Permit Cover Sheet).
MODIFICATION SUMMARY: Because Outfall 003 is an existing [not new], the discharge of oxygen -
consuming wastes to a receiving stream under zero -flow conditions may be permitted, at the Director's
discretion [15A NCAC 02B .0206 (b) (2). Therefore, permit limits and monitoring at 003 are herein
adjusted to reflect zero -flow [7Q10 and 30Q2 = 0.0 cfs] in accord with 15A NCAC 02B .0206 (b) (1).
Considering this non-POTW (non -publicly owned treatment works), the Monthly Average (MA) and Daily
Maximum (DM) permit limits are in part determined according to 2B .0505 [see sections A. (1.) and A. (2.)].
The Division understands that the Permittee is actively installing additional treatment for copper proposed
as Copper Removal Resin System, see application "New Equipment List" signed by Engineer, Gary
Macconnell; details included in the permit (see Supplement to Permit Cover Sheet).
Proposed Copper Treatment System Components
• control center panel [480v]
• two (2) each mixing tanks [approx. 4000 gal with 1
• two (2) each [1.5 hp 3500 rpm 480v]
• two (2) each tank mixers [3 hp, 1750 rpm Iv with 1 Hers spaces 2" apart]
• one (1) each acid metering pump [with pH c i n . 1, prob
• one (1) each caustic metering pum • [with p bk .1, prob
• resin trains 1 and 2 [with p s''', . obe #3
• appurtenant piping [schedu
• four (4) canisters o
• flow totalizer [
• five (5) each carbo
Revisions to the Previous Permit
• Outfall 001 — Downstream monitoring continues (location to be determined)
o Revised summer limits for Ammonia (NH3 as N) = 2.5 mg/L, 12.5 DM
o Revised winter Ammonia (NH3 as N) — monitor and report only
o Revised limits for Total Copper = 35 µg/L MA; 48 µg/L DM
• Outfall 003 — Revised permit limits and monitoring
o reflects zero -flow receiving stream conditions under emergency discharge conditions only.
o ALL parameters previously monitored Weekly shall be monitored Daily.
o Whole Effluent Toxicity (WET), previously monitored Quarterly, shall be monitored
Weekly.
Fact Sheet
Permit Renewal Feb2023 -- NPDES Permit NC0035173
Page 2

PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
[Tentative] Permit Scheduled to Issue:
[Tentative] Effective date
If you have questions, email [[e-mail]]
NPDES Division Contact
February 14, 2023
March 24, 2023
May 1, 2023
If you have questions on any of the above information or on the attached pern1it, please email Joe R.
Corporon, P.G. [joerporon c(tcdenr.gov].
The NC 2007-2015 Water
Environmental Management
subsequently approved the W
metal limits in draft permits out t
the new standards - as approved.
Standards — Freshwater Standards
S) Triennial Review was approved by the NC
C) on November 13, 2014. The US EPA
ns on April 6, 2016, with some exceptions. Therefore,
lic notice after April 6, 2016 must be calculated to protect
Table 2. NC Dissolved Metals Water Quality Standards/Aquatic Life Protection
Parameter
Acute FW, µg/1
(Dissolved)
Chronic FW,
µg/1
(Dissolved)
Acute SW, µg/1
(Dissolved)
Chronic SW,
µg/1
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Fact Sheet
Permit Renewal Feb2023 -- NPDES Permit NC0035173
Page 3

Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life
standards for Mercury and selenium are still expressed as Total Recoverable Metals due to
bioaccumulative concerns (as are all human health standards for all metals). It is still
necessary to evaluate total recoverable aquatic life and human health standards listed in
15A NCAC 2B.0200 (e.g., arsenic at 10 µg/1 for human health protection; cyanide at 5
µg/L and fluoride at 1.8 mg/L for aquatic life protection).
Table 3. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/1
Cadmium, Acute
WER*{1.136672-[ln hardness](0.041838)} • e^{0.9151 [ln hardness]-3.1485}
Cadmium, Acute Trout waters
WER* { 1.136672-[ln hardness](0.041838)} • e^{0.9151 [ln hardness]-3.6236}
Cadmium, Chronic
WER* { 1.101672-[ln hardness](0.041838)} • e^{0.7998[ln hardness1-4.4451 }
Chromium III, Acute
WER*0.316 • e^{0.8190[ln hardness]+3.7256}
Chromium III, Chronic
WER*0.860 • e^{0.8190[ln hardness]+0.6848}
Copper, Acute
WER*0.960 • e^{0.9422[ln hardness]-1.700}
Copper, Chronic
WER*0.960 • e^{0.8545[ln hardness]-1.702}
Lead, Acute
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-1.460}
Lead, Chronic
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[In hardness]-4.705}
Nickel, Acute
WER*0.998 • e^{0.8460[ln hardness]+2.255}
Nickel, Chronic
WER*0.997 • e^{0.8460[ln hardness]+0.0584}
Silver, Acute
WER*0.85 • e^{1.72[ln hardness]-6.59}
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 • e^{0.8473[ln hardness]+0.884}
Zinc, Chronic
WER*0.986 • e^{0.8473[ln hardness]+0.884}
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However,
application of the dissolved and hardness -dependent standards requires additional consideration in
order to establish the numeric standard for each metal of concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream (upstream)
hardness and so must be calculated case -by -case for each discharge.
Fact Sheet
Permit Renewal Feb2023 -- NPDES Permit NC0035173
Page 4

Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR
122.45(c). The discharge -specific standards must be converted to the equivalent total values for
use in the RPA calculations. We will generally rely on default translator values developed for each
metal (more on that below), but it is also possible to consider case -specific translators developed in
accordance with established methodology.
RPA Permitting Guidance/WQBELs for Hardness -Dependent Metals - Freshwater
The RPA is designed to predict the maximum likely effluent concentrations for each metal of
concern, based on recent effluent data, and calculate the allowable effluent concentrations, based
on applicable standards and the critical low -flow values for the receiving stream.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the
discharge has reasonable potential to exceed the standard, which warrants a permit limit in most
cases. If monitoring for a particular pollutant indicates that the pollutant is not present (i.e.
consistently below detection level), then the Division may remove th- onitoring requirement in
the reissued permit.
1. To perform a RPA on the Freshwater hardness-dd. - ; i m - a the Permit Writer
compiles the following information:
• Critical low flow of the receivin stream, spreaeet automatically
calculates the 1 Q 10 using the fo a 1 Q 10 1.: �'. (s7Q 1► s 0.993
• Effluent hardness and upstream h . site- • -cific data ireferred
• Permitted flow
• Receiving stream
2. In order to est
and for each indiv
instream (upstream
hardness -dependent metal of concern
riter must first determine what effluent and
se in the equations.
The permit writer revie 's, Effluent Pollutant Scans, and Toxicity Test results for
any hardness data and co s s the Permittee to see if any additional data is available for
instream hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation
using a default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum
limits on the hardness value used for water quality calculations are 25 mg/L and 400 mg/L,
respectively.
If the use of a default hardness value results in a hardness -dependent metal showing
reasonable potential, the permit writer contacts the Permittee and requests 5 site -specific
effluent and upstream hardness samples over a period of one week. The RPA is rerun using
the new data.
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic) =
(Permitted Flow, cfs *Avg. Effluent Hardness, mg/L) x (s7Q10, cfs *Avg. Upstream Hardness, mg/L)
(Permitted Flow, cfs + s7Q10, cfs)
Fact Sheet
Permit Renewal Feb2023 -- NPDES Permit NC0035173
Page 5

The Combined Hardness for acute is the same but the calculation uses the 1Q10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total
recoverable metal, using the EPA Default Partition Coefficients (DPCs) or site -specific
translators, if any have been developed using federally approved methodology.
EPA default partition coefficients or the "Fraction Dissolved" converts the value for
dissolved metal at laboratory conditions to total recoverable metal at in -stream ambient
conditions. This factor is calculated using the linear partition coefficients found in The
Metals Translator: Guidance for Calculating a Total Recoverable Permit Limit from a
Dissolved Criterion (EPA 823-B-96-007, June 1996) and the equation:
Cdiss = 1
Ctotal 1 + { [KPol [ss(1±01 [10-6] }
Where:
ss = in -stream suspended solids concentration [mg/11, minimum of 10 mg/L used, and
Kpo and a = constants that express the equilibrium relationship between dissolved and
adsorbed forms of metals. A list of constants used for each hardness -dependent metal can
also be found in the RPA program under a sheet labeled DPCs.
4. The numeric standard fo
coefficient (or site-s . - ific
conditions.
In some cases, wh
silver), the dissolve
conversion factor to o
presumes that the met
al
an EP
men
�t. n a
's s
development for metals_
the default partition
verable Metal at ambient
coefficient translator does not exist (ie.
r each metal of concern is divided by the EPA
al ' -coverable Metal at ambient conditions. This method
ved to the same extent as it was during EPA's criteria
ore information on conversion factors see the June, 1996
EPA Translator Guidance Document.
5.
6. The RPA spreadsheet uses a mass balance equation to determine the total allowable
concentration (permit limits) for each pollutant using the following equation:
Ca = (s7Q 10 + Qw) (Cwqs) — (s7Q 10) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or
mg/L)
Qw = permitted effluent flow (cfs, match s7Q 10)
s7Q10 = summer low flow used to protect aquatic life from chronic toxicity and human
health through the consumption of water, fish, and shellfish from noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background
concentrations
Fact Sheet
Permit Renewal Feb2023 -- NPDES Permit NC0035173
Page 6

Flows other than s7Q 10 may be incorporated as applicable:
1Q10 = used in the equation to protect aquatic life from acute toxicity
QA = used in the equation to protect human health through the consumption of
water, fish, and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
7. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of
concern. Data entered must have been taken within four and one-half years prior to the date
of the permit application (40 CFR 122.21). The RPA spreadsheet estimates the 95th
percentile upper concentration of each pollutant. The Predicted Max concentrations are
compared to the Total allowable concentrations to determine if a permit limit is necessary.
If the predicted max exceeds the acute or chronic Total allowable concentrations, the
discharge is considered to show reasonable potential to violate the water quality standard,
and a permit limit (Total allowable concentration) is included in the permit in accordance
with the U.S. EPA Technical Support Document for Water Quality -Based Toxics Control
published in 1991.
8. When appropriate, permit writers develop facility spec
accordance with the EPA Headquarters Memo d
Alexis Strauss on 40 CFR 122.47 Complianc
9. The Total Chromium NC WQS was remit' d
hexavalent chromium Water Quality Sta
data results may be used a . : s ative
results based on chromi or . In the
(95th %) for total - o 1 b ompar
chromium III
10. Effluent hardnes
inserted into all pe
the accuracy of the p
11. Hardness and flow val
included:
pliance schedules in
07 from James Hanlon to
ents.
with to a ent chromium and
savings m:.: s e, total chromium
es where there are no analytical
ted maximum concentration
er quality standards for
s sampling, upstream of the discharge, are
monoring for hardness -dependent metals to ensure
uild a more robust hardness dataset.
the Reasonable Potential Analysis for this permit
Parameter
Value
Comments (Data Source)
Average Effluent Hardness (mg/L)
[Total as, CaCO3 or (Ca+Mg)]
N/A
To be established
Monitoring Upstream Hardness (mg/L)
[Total as, CaCO3 or (Ca+Mg)]
N/A
Upstream replaces Downstream —
(Not possible under receiving -
stream zero -flow)
Outfall 001
7Q 10s (cfs)
7Q10w (cfs)
0.075
0.30
Outfall 003
7Q 10s (cfs)
7Q10w (cfs)
0.0
0.0
Permitted Flow (MGD)
0.025
Fact Sheet
Permit Renewal Feb2023 -- NPDES Permit NC0035173
Page 7