NC0047384_Pretreatment_IUP_Evonik02_Renewal_20240504

CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
INDUSTRIAL WASTE SECTION
SIGNIFICANT INDUSTRIAL USER
WASTEWATER DISCHARGE PERMIT
SIU PERMIT NUMBER P021
EVONIK SUPERABSORBER, LLC 02
IS AUTHORIZED TO DISCHARGE WASTEWATER
FROM A FACILITY LOCATED AT
2401 DOYLE STREET
GREENSBORO, NORTH CAROLINA
into the City of Greensboro Sanitary Sewer System
to the T.Z. OSBORNE Water Reclamation Facility
[NPDES PERMIT NUMBER NC0047384]
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.
Amy V inoski Date
Pretreatment Coordinator

Page 2, SIU Permit 0021
EVONIK SUPERABSORBER, LLC 02
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#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
SECTION I—PERMIT MODIFICATION HISTORY
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
September 1, 1998 PERMIT RENEWAL
September 1, 2003 PERMIT RENEWAL
PERMIT RENEWAL
Page 1, Name change from Stockhausen, Inc. to Evonik Stockhausen,
Inc.; Page 4, Section II.B.2. —Modification of pretreatment processes;
Section II.C. —Modification of monitoring location description; Page
September 1, 2008 6, Section IV.A.3. —incorporated requirement of flow data submittal
by the 15th for the previous month's readings; Section IV.A.4. —
Clarified reporting period, Section IV.A.5. —included additional
POTW contact information; Section IV.A.6. — updated Customer
Service contact information Page 4, Section II.A. —Description of
discharge corrected to read "Pipe 02" rather than "Pipe 01".
Permit Modification
Increase in business requiring flow limit increase, Page 5,flow limit
July 1, 2010 changed from 100,000 gallons 6-month average to 130,000 gallons 6-
month average; monthly monitoring for TSS added due to increase
TSS loading
Permit Modification
Page 5, Section III reduced the minimum requirement for monitoring
by the City of Greensboro to once per year; b)Page 6, Section
IV.A.4—changed effluent meter calibration requirement from once per
July 1, 2011 six-month period to once a calendar year; c) Page 6, Section IV.A.5
and 6- deleted names from permit and included the position titles
only; Page 7, Section IV. —added a new "C. Self-Monitoring Report
Submittal Dates" requiring report submittal by the 15th of each month
for previous month sampling events.
Permit Modification
January 1, 2013 Name changed to Evonik Corporation after a merger. No process or
personnel changes.
PERMIT RENEWAL
Section IIL - Added selenium to POTW sampling; Changed sampling
September 1, 2013 by City to 116 Months; Removed TSS Self-Monitoring; Section IV. —
Added Special Condition D (Slug/Spill Control Plan)per DWQ
guidance.
PERMIT RENEWAL
September 1, 2018 Special Conditions Changes: Added Flow Measurement Calibration/
Verification Section; Modified Flow language , Added Pipe 01/Pipe 02
Combined Compliance Section for Flow, BOD, TSS
Permit Modification: Name changed to Evonik Superabsorbers, LLC
July 1, 2021 after a corporate subsidiary transfer. No process or personnel
changes.
September 1, 2023 Permit Renewal

Page 3A, SIU Permit#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
SECTION I—PERMIT MODIFICATION HISTORY cont'd
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
September 1, 2023 PERMIT RENEWAL

Page 4, SIU Permit#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
SECTION II - GENERAL INFORMATION
A. Description of Discharge
Pipe 02—Process Wastewater from cleaning, equipment use, facility washdown and air pollution
control from chemical processing in Plant 6, Railroad unloading and utilities
Pipe 02 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.
Flow Equalization
Neutralization, pH adjustment
Solids Removal - Screening
Spill Protection
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
Sampling facility located on the west side of Plant 6 building on Terrell Street near the chain link
security fence.
D. Composite Sampling Technique
A composite sample for the purposes of this permit is:
A Flow Proportional Composite sample taken over the entire workday by an automatic sampler
interfaced with the effluent flow meter. The City of Greensboro performs all routine compliance
sampling for this facility.

Page 5, SIU Permit#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
SECTION III - EFFLUENT LIMITS AND MONITORING REQUIREMENTS
Effluent Limits and Monitoring Requirements for Pipe 02
THIS FACILITY IS NOT REGULATED BY FEDERAL CATEGORICAL
PRETREATMENT STANDARDS AND IS A SIGNIFICANT INDUSTRIAL USER DUE
TO FLOW ONLY
EFFLUENT LIMITATIONS MONITORING FREQUENCY
EFFLUENT Daily 6- Month Sample CITY OF
CHARACTERISTICS Maximum Average Type PERMITTEE GREENSBORO
Flow (gallons per day) 130,000^ # DAILY
H standard units 5.0— 12.0 Grab 1/6 months
BOD++ m /1 M C 1/6 months
Suspended Solids++ m /1 M C 1/6 months
Cadmium T m /1 M C 1/6 months
Chromium T m /1 M C 1/6 months
Copper T m /1 M C 1/6 months
Lead T m /1 M C 1/6 months
Nickel T m /1 M C 1/6 months
Zinc T m /1 M C 1/6 months
Selenium T m /1 M C 1/6 months
Silver T m /1 M C 1/6 months
Cyanide (total) (mg/1) M Grab 1/6 months
ALL METALS ARE TO BE ANALYZED AS TOTAL[TJ
++ALL BOD CONCENTRATIONS OVER 200 mg/1 AND ALL TOTAL SUSPENDED
SOLIDS CONCENTRATIONS OVER 200 mg/1 ARE SUBJECT TO AN INDUSTRIAL
WASTE SURCHARGE
# The Greensboro Industrial Waste Section does not consider Flow to be a pollutant and
flow data is not considered to be a report.
^ Flow compliance will be based on a combined flow from Pipe 01 and Pipe 02. See
Special Condition B.
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#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
SECTION IV - SPECIAL PERMIT CONDITIONS
A. FLOW MEASUREMENT
Compliance with the flow limit in this permit shall be documented in the following manner:
1. The Permittee shall provide and maintain a refrigerated composite sampler and primary flow
measurement device for flow proportional sampling and flow measurement of the permittee's
process wastewater discharge.
2. The effluent process flow meter readings shall be recorded daily and the daily effluent flow
calculated in gallons per day. Flow measurement records shall be submitted to the City of
Greensboro Industrial Waste Section monthly. Data is to be submitted by the 151h of each
month for the previous month's flow measurements.
3. The permittee shall maintain permanent flow records and maintenance and calibration
records on-site for a minimum of three years. These records shall be available to the City of
Greensboro Industrial Waste Section during inspections or upon request.
4. Immediate notification, within 24 hours of becoming aware of the problem, shall be provided
to the Pretreatment Coordinator [336-433-7227] or Pretreatment Compliance Specialist [336-
373-3285] by phone or e-mail for any periods in which the effluent meter is inoperable with
the exception of periods for maintenance/calibration. This notification shall include the
cause of the malfimction/failure, anticipated repair time and/or plan of action to allow the
permittee to comply with the requirement to record the flow meter readings daily.
5. Malfunction/failure of effluent flow meters that are used for sewer billing purposes shall also
be immediately reported, within 24 hours of becoming aware of the problem, to the Water
Resources Customer Service Division by phone---Assistant Manager [336-373-4108] or
Manager [336-373-2639]. Failure to do so will result in the Industrial Waste Section and the
Water Resources Customer Service Division reverting back to the incoming water meter to
determine compliance and billing.
6. The wastewater meter must have a non-resettable totalizer that reads in cubic feet or gallons.
There shall be no by-pass capability of the wastewater metering devices and monitoring
point(s).
7. If the wastewater meter is being used for billing or compliance, it must have permanent flow
records (i.e. strip chart recordings) that include at minimum the following basic information:
date, time, totalizer reading (with units), interval flow volume(with units), maximum flow
rate (with units), and primary measuring device type. Any interruption in such records with
the exception of periods for maintenance/calibration are a violation of this permit and may
result in a civil penalty each day the interruption is allowed to continue.
September 1, 2023 Permit Renewal

Page 7, SIU Permit#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
8. The wastewater meter shall have a back-up power source (battery or generator) to ensure
uninterrupted measurement of the discharge flow in the event of a power failure unless loss
of power automatically prevents any discharge from the facility. The back-up source shall
provide power to the wastewater meter's sensor and permanent flow records for a minimum
of 12 hours.
B. PIPE 01 and PIPE 02 COMBINED LIMITATION COMPLIANCE CALCULATIONS
Compliance with Flow limitations, BOD allocations, and TSS allocations will be calculated
using combined data from Pipe 01 and Pipe 02. Total effluent flow is not to exceed combined
total flow limit for both pipes. Total effluent BOD and total effluent TSS loading is not to
exceed combined total allocations for both pipes.
C. 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, trite, 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.
D. 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 may 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 the 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 include, but is not
limited to:
September 1,2023 Permit Renewal

Page 8, SIU Permit#P021
EVONIK SUPERABSORBER, LLC 02
Effective September 1, 2023
■ 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.
E. FLOW METER 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 maintained for a
minimum of three (3) years and made available upon request and during on-site inspections.
1. 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.
The following flow meters/systems have no calibration requirements:
1. Industries with custom built Memtek0 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 I,2023 Permit Renewal