NC0047384_Pretreatment_IUP_United_Renewal_20240509

CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
INDUSTRIAL WASTE SECTION
SIGNIFICANT INDUSTRIAL USER
WASTEWATER DISCHARGE PERMIT
SIU PERMIT NUMBER P040
UNITED METAL FINISHING, INCORPORATED
IS AUTHORIZED TO DISCHARGE WASTEWATER
FROM A FACILITY LOCATED AT
133-137 BLUE BELL ROAD
GREENSBORO, NORTH CAROLINA
into the City of Greensboro Sanitary Sewer System
to the T.Z. OSBORNE Water Reclamation Facility
[NPDES PERMIT NUMBER NCO047384]
in accordance with the limitations and conditions set forth in this permit.
This permit shall become effective
SEPTEMBER 1, 2023
This permit and the authorization to discharge shall
expire at midnight on
AUGUST 31, 2028
or upon permit reissuance, whichever comes first.
�& - - S 'Q-3
Amy Var6loski Date
Pretreatment Coordinator

Page 2, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
INDUSTRY OFFICIAL RESPONSIBLE FOR PERMIT COMPLIANCE
This signatory official shall be responsible for permit compliance, including monitoring, report
submittals, accidental discharge notification, and permit renewal. Although certain of these
activities may be delegated to other individuals, the Signatory Official is ultimately responsible
for compliance with all permit conditions, limits, activities and terms.
I am aware of my responsibilities as Signatory Official and I am aware of the terms and
conditions set forth in this wastewater discharge permit and the City of Greensboro Sewer Use
and Pretreatment Ordinance.
Signatory Official NAME (PLEASE PRINT)
Signatory Official TITLE (PLEASE PRINT)
Signatory Official Signature
Date:
CHANGE OF SIGNATORY OFFICIAL
If there is a change of the Signatory Official for this facility, the City of Greensboro shall be
notified of such change within thirty (30) days. A new page 2, "INDUSTRY OFFICIAL
RESPONSIBLE FOR PERMIT COMPLIANCE" shall be submitted to the Industrial Waste
Section with the name, title and signature of the new official.
September 1, 2023 Permit Renewal

Page 3, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
SECTION I — PERMIT MODIFICATION HISTORY
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
September 1, 1998 PERMIT RENEWAL—No changes.
May 19, 2000 Correction in how flow measurements are to be taken. Incoming
process flow meter is to be read in lieu of effluent process flow meter.
PERMIT RENEWAL
Page 4—Sampling techniques clarified to be a minimum offour
samples; Page 5, Section III—flow limit changed from daily maximum
September 1, 2008 of 40,000 gpd to monthly average of 15,000 gpd and effective date
incorporated; Section IV.A, Page 6-added due dates for TTO
certification; Section IV.B, modified to add flow report submittal due
date
Modification of Monitoring Location and Sampling Technique.
January 1, 2009 Samples will now be taken as automatic composite samples with an
ISCO sampler from the effluent tank.
June 1, 2009 Page 8. Section added to include submittal date for self-monitoring
reports. Report due 15th of each month for previous month
1) Page 5, Section III- Changed minimum sampling requirement for
July 1, 2011 City to 1/year. 2) Page 6, Section IV.B.3.—changed effluent meter
calibration requirement from once per six-month period to once a
calendar year
PERMIT RENEWAL
Section 111—Added self-monitoring. Section IV. - Modified Special
September 1, 2013 Condition A (TTO); Added Special Condition E(Slug/Spill Control
Plan); Section III-Added TTO sampling frequency and sample type for
POTW per DWQ guidance.
PERMIT RENEWAL
September 1, 2018 Changed Special Conditions Sections:Added flow measurement
calibration/verification section; Modified Total Toxic Organics
Certification section;
PERMIT REISSUANCE
April 1, 2019 Permit Reissued with change of company name and change of
ownership
September 1, 2023 PERMIT RENEWAL
September 1,2023 Permit Renewal

Page 4, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
SECTION II - GENERAL INFORMATION
A. Description of Discharge
Pipe 01 —Process Wastewater from zinc and nickel electroplating processes and anodizing and
phosphating processes
Pipe 01 does not include domestic waste discharge.
B. Authorization Statement
1. The permittee is hereby authorized to discharge wastewater in accordance with the effluent
limitations, monitoring requirements, and all other conditions set forth in this Industrial User
Pretreatment Permit(IUP) into the sewer collection system and wastewater treatment facility of
the City of Greensboro
2. The permittee is hereby authorized to continue operation of and discharge wastewater from
the following treatment or pretreatment facilities. These facilities must correspond to the
treatment units listed on both the application and inspection forms.
Chemical Precipitation Filtration
Flocculation Neutralization,pH adjustment
Spill Protection Flow Equalization
Solids Removal-filter press
3. The permittee is hereby authorized to, if requested by the City of Greensboro and after
receiving Authorization to Construct (A to C) from the City of Greensboro, construct and operate
additional pretreatment units as needed to meet final effluent limitations.
C. Monitoring Location
ISCO sampler located in the pretreatment area next to the Memtek system in the main building
D. Composite Sampling Technique
A composite sample for the purposes of this permit is:
A "time composite" sample taken by an automatic sampler at a minimum of every 30 minutes.
Samples shall be of equal volume taken over the entire workday.
September 1, 2023 Permit Renewal

Page 5, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
SECTION III - EFFLUENT LIMITS AND MONITORING REQUIREMENTS
Effluent Limits and Monitoring Requirements for Pipe 01
THIS FACILITY IS REGULATED BY FEDERAL CATEGORICAL PRETREATMENT
STANDARDS FOR NEW SOURCE METAL FINISHING
[40 CFR PART 433.17]
EFFLUENT LIMITATIONS MONITORING FREQUENCY
EFFLUENT Daily Monthly Sample PERMITTEE CITY OF
CHARACTERISTICS Maximum Average Type GREENSBORO
Flow (gallons per day) 15,000 # DAILY
Cadmium T m /1 0.07 - C 2/6 months 1/ ear
Chromium T m /I 2.77 1.71 C 2/6 months 1/ ear
Copper T m /1 3.38 2.07 C 2/6 months 1/ ear
Lead T m /1 0.69 0.43 C 2/6 months 1/ ear
Nickel T m /1 3.98 2.38 C 2/6 months 1/ ear
Silver T m /1 0.43 0.24 C 2/6 months 1/ ear
Zinc T m /1 2.61 1.48 C 2/6 months 1/ ear
Cyanide [total] m /1 0.05 - Grab 1/6 months 1/ ear
Total Toxic Organics^ 2.13 - Grab ** 1/year**
TTO m /1
ALL METALS ARE TO BE ANAL YZED AS TOTAL METALS[TJ
** A certification statement can be submitted semi-annually in lieu of sampling for total
toxic organics (TTO). See Section IV—Special Permit Conditions
^ See attached list for Definition of Total Toxic Organics under 40 CFR Part 433
#The Greensboro Industrial Waste Section does not consider flow to be a pollutant and
flow data is not considered a report.
C - Composite Sample [See Section II Part D for permit-specific definition]
G - Grab Sample
M- Monitoring Only [See Local Pollutant Allocation Document to determine if an
Allocation has been issued for this parameter]
September 1, 2023 Permit Renewal

Page 6, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
SECTION IV - SPECIAL PERMIT CONDITIONS
A. TOTAL TOXIC ORGANICS CERTIFICATION IN LIEU OF MONITORING
[40 CFR Part 413, Part 433, and Part 469]
Per 40 CFR Part 413.03, 433.12, or 469.13, in lieu of monitoring for Total Toxic Organics
(TTO) this facility may complete, sign, date, and submit a semi-annual certification statement,
which includes the following language:
"Based on my inquiry of the person or persons directly responsible for managing compliance
with the pretreatment standard for total toxic organics (TTO), I certify that, to the best of my
knowledge and belief, no dumping of concentrated toxic organics into the wastewaters has
occurred since filing the last discharge monitoring report" because (select correct statement
below):
I further certify that no toxic organics (as defined by EPA), are used at this facility
I further certify that this facility is implementing the current toxic organic management
plan submitted to the City of Greensboro.
I hereby certify that I have personally examined and am familiar with the information submitted
in this document and that the information is true, accurate and complete. I am aware that there
are significant penalties for submitting false information. "
The semi-annual TTO certification statements are due by July 15th of each year (covering the
previous January 1 through June 30 period) and January 15th of each year (covering the previous
July 1 through December 31 period). Certification statements must not be signed prior to the end
of the semi-annual period.
B. FLOW MEASUREMENT
Compliance with the flow limit in this permit shall be documented in the following manner:
Flow Meter: The effluent flow meter is located in the main building on a panel integrated within
the Memtek pretreatment system at the sampling location.
This flow meter shall be read, recorded, and the daily flow calculated in gallons per day. Flow
measurement records shall be submitted to the City of Greensboro Industrial Waste Section
monthly. Flow data is to be submitted by the 151" of each month for the previous month's flow
measurements. If no discharge occurs during the month, the permittee shall submit the monthly
record on time and state "NO DISCHARGE" on the record
The permittee shall maintain permanent flow records and meter maintenance records on-site for
a minimum of three (3) years. These records shall be available to the City of Greensboro
Industrial Waste Section during inspections or upon request.
See Flow Meter Calibration/Verification Requirements in another subpart of this section.
September 1, 2023 Permit Renewal

Page 7, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
C. PERMITTEE SAMPLING AND MONITORING REPORT SUBMITTAL DATES
Permittee Sampling for the pollutant limitations in Section III (Effluent Limits and Monitoring
Requirements) of this permit shall be conducted in the following manner:
1. Samples for the January 1-June 30 Reporting Period shall ALL be taken during the
months of January, February and/or March. The compliance report shall be submitted on
or before APRIL 15 of each year.
2. If there are no discharges during months designated for sampling, the April 15
compliance report shall be submitted with the notation"NO DISCHARGE/NO
SAMPLING". If there is a discharge after March and prior to June 30, self-monitoring is
still required to meet the permit monitoring requirements and that data shall be submitted
with the corresponding monthly flow data.
3. Samples for the July 1-December 31 Reporting Period shall ALL be taken during the
months of July, August and/or September. The compliance report shall be submitted on
or before OCTOBER 15 of each year.
4. If there are no discharges during months designated for sampling, the October 15
compliance report shall be submitted with the notation"NO DISCHARGE/NO
SAMPLING". If there is a discharge after September and prior to December 31, self-
monitoring is still required to meet the permit monitoring requirements and that data shall
be submitted with the corresponding monthly flow data.
If there are no discharges during a entire semi-annual reporting period, a letter must be submitted
to the Industrial Waste Section by July 15 or January 15 stating there was no discharge and no
sampling for that period. This letter must be signed and certified by the signatory official.
D. SIGNATORY REQUIREMENTS FOR INDUSTRIAL USER REPORTS
All self-monitoring and re-sampling data submitted for compliance to the City of Greensboro
shall include the certification statement below and shall be signed by the person on-site at the
facility who is authorized to represent the company in an official capacity concerning matters
that involve the City of Greensboro Industrial Waste Section ("Signatory Official").
I certify under penalty of law that this document and all attachments were prepared
under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my
inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fine and
imprisonment for knowing violations. [40 CFR Part 403.6]
September 1,2023 Permit Renewal

Page 8, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
E. SLUG/SPILL CONTROL PLAN
The permittee shall provide protection from accidental and slug discharges of prohibited
materials and other substances regulated by this permit, which have a reasonable potential to
cause Interference or Pass Through, or in any other way violate the POTW's regulations, local
limits or Permit conditions.
The permittee shall notify the Industrial Waste Section immediately of any changes at its facility
affecting potential for a Slug Discharge.
The permittee shall submit a new or updated slug/spill control plan for approval when so directed
in writing by the City of Greensboro Industrial Waste Section. The plan shall contain, at a
minimum the following elements:
■ Description of discharge practices, including non-routine batch discharges;
■ Description of stored chemicals;
■ Procedures for immediately notifying the POTW of slug discharges that would cause a
violation of 40 CFR Part 403.5(b) [EPA Specific Prohibitions included in Greensboro
SUO Article II, Section 1. B.], with procedures for follow up written notification within 5
days;
■ If necessary, procedures to prevent adverse impact from accidental spills, including
inspection and maintenance of storage areas, handling and transfer of materials, loading
and unloading operations, control of plant site run-off, worker training, building of
containment structures or equipment, measures for containing toxic organic pollutants
(including solvents) and/or measures and equipment for emergency response.
Any current slug/spill control plan developed by the permittee and approved by the City of
Greensboro is hereby incorporated as a condition of this Significant Industrial User Permit.
F. FLOW MEASUREMENT CALIBRATION/VERIFICATION
Flow meters used for flow monitoring under this permit shall be calibrated in accordance with
manufacturer's recommendation by an independent contractor or a Greensboro Industrial Waste
Section approved in-house technician. Calibration documentation shall be made available upon
Flow meters used for flow monitoring under this permit shall be calibrated in accordance with
manufacturer's recommendation by an independent contractor or a Greensboro Industrial Waste
Section approved in-house technician. Calibration documentation shall be maintained for a
minimum of three (3) years and made available upon request and during on-site inspections.
I. Industries with a highly-accurate (<0.5% variance) flow meter, such as a magnetic or
ultrasonic (Doppler and transit) meter, must have the meter calibrated/verified once every
five years.
2. Industries with effluent wastewater meters that are used for City of Greensboro sewer
billing purposes, must calibrate the meters annually. Permanent records in the form of
electronic data trend sheets, strip or circular chart recordings that have back-up and fail-
safe capabilities are also required to be maintained.
3. Any industry may conduct meter calibration more frequently than required in this permit.
September 1, 2023 Permit Renewal

Page 9, SIU Permit#P040
UNITED METAL FINISHING, INC.
Effective September 1, 2023
The following flow meters/systems have no calibration requirements:
1. Industries with custom built MemtekO pretreatment systems have a permanently
calibrated flow measurement system (as long as the plumbing remains intact and the
viscosity of the liquid does not change) and no calibration is required.
2. Industries with a non-discharge closed-loop system are not required to have any meter on
the system calibrated.
3. Industries that record daily flow from a City of Greensboro owned, maintained, and
calibrated incoming potable water meter are not required to have the meters calibrated.
4. The Industrial Waste Section does not require deduct meters to be calibrated.
Industries with an electronic data base with power back-up do not need to maintain redundant
paper recorders.
September 1, 2023 Permit Renewal

Total Toxic Organics (TTO) List
40 CFR Part 413 Electroplating and 40 CFR Part 433 Metal Finishing
The term TTO shall mean total toxic organics,which is the summation of all quantifiable
values greater than 0.01 milligrams per liter(mg/1)for the following toxic organics:
[From 40 CFR Part 413.02(i)]
Acenaphthene 4-Chlorophenyl phenyl ether
Acrolein 4-Bromophenyl phenyl ether
Acrylonitrile Bis (2-chloroisopropyl) ether
Benzene Bis (2-chloroethoxy)methane
Benzidine Methylene chloride [Dichloromethane]
Carbon tetrachloride[Tetrachloromethane] Methyl chloride[Chloromethane]
Chlorobenzene Methyl bromide[Bromomethane]
1,2,4-Trichlorobenzene Bromoform[Tribromomethane]
Hexachlorobenzene Dichlorobromomethane
1,2-Dichloroethane Chlorodibromomethane
1;1,1-Trichloroethane Hexachlorobutadiene
Hexachloroethane Hexchlorocyclopentadiene
1-1-Dichloroethane Isophorone
1,1,2-Trichloroethane Naphthalene
1,1,2,2-Tetrachloroethane Nitrobenzene
Chloroethane 2-Nitrophenol
Bis(2-chloroethyl) ether 4-Nitrophenol
2-Chloroethyl vinyl ether (mixed) 2,4-Dinitrophenol
2-Chloronaphthalene 4,6-Dinitro-o-cresol
2,4,6-Trichlorophenol N-nitrosodimethylarnine
Para-chloro-meta-cresol N-nitrosodiphenylarnine
[4-chloro-3-methyl phenol] N-nitrosodi-n-propylamine
Chloroform[Trichloromethane] Pentachlorophenol
2-Chlorophenol Phenol
1,2-Dichlorobenzene Bis (2-ethylhexyl)phthalate
1,3-Dichlorobenzene Butyl benzyl phthalate
1,4-Dichlorobenzene Di-n-butyl phthalate
3,3-Dichlorobenzidine Di-n-octyl phthalate
1,1-Dichlororethylene Diethyl phthalate
1,2-trans-Dichloroethylene Dimethyl phthalate
2,4-Dichlorophenol 1,2-benzanthracene [Benzo(a)anthracene]
1,2-Dichloropropane Benzo(a)pyrene[3,4-benzopyrene]
1,3-Dichloropropylene 3,4-Benzofluoranthene
[1,3-dichloropropene] [Benzo(b)fluorcanthene]
2,4-Dimethylphenol 11,12-Benzofluoranthene
2,4-Dinitrotoluene [Benzo(k)fluoranthenej
2,6-Dinitrotoluene Chrysene
1,2-Diphenylhydrazine Acenaphthylene
Ethylbenzene Anthracene
Fluoranthene I 1,12-Benzoperylene[Benzo(ghi)perylene]
2018 Total Toxic Organics List for 40 CFR Part 413-Electroplating and Part 433-Metal Finishing Page 1 of 2

Fluorene
Phenanthrene
1,2,5,6-Dibenzanthracene
[Dibenzo(a,h)anthracene]
Indeno (1,2,3-cd)pyrene
[2,3-o phenylenepyrene]
Pyrene
Tetrachloroethylene
Toluene
Trichloroethylene
Vinyl chloride[Chloroethylene]
Aldrin
Dieldrin
Chlordane (technical mixture and
metabolites)
4,4-DDT
4,4-DDE[p,p-DDV
4,4-DDD[pp-TDE]
Alpha-endosulfan
Beta-endosulfan
Endosulfan Sulfate
Endrin
Endrin aldehyde
Heptachlor
Heptachlor epoxide
[BHC-hexachl oro cyclohexane]
Alpha-BHC
Beta-BHC
Gamma-BHC[Lindane]
Delta-BHC
[PCB polychlorinated biphenyls]
PCB-1242[Arochlor 12421
PCB-1254[Arochlor 1254]
PCB-1221 [Arochlor 1221]
PCB-1232[Arochlor 1232]
PCB-1248 [Arochlor 1248]
PCB-1260 [Arochlor. 1260]
PCB-1060[Arochlor 1016]
Toxaphene
2,3,7,8-Tetrachlorodibenzo-p-dioxin
[TCDD]
NOTE:Names in brackets and italics are alternate names for the same chemical
2018 Total Toxic Organics List for 40 CFR Part 413-Electroplating and Part 433-Metal Finishing Page 2 of 2