NC0047384_Pretreatment_IUP_Solenis_Modification_20240509

NC Division of Water Resources
1c,trPamlinPr1 Inrli_Igtri; l I_ISPr Permit (11_IN ReViP\Al
Streamlined Industrial User Permit Review Submittal Form
One form may cover multiple IUPs submitted together.
Program Name: City of Greensboro
WWTP Name: T.Z. Osborne WRRF
Permit Renewals
Date application(s) received
Date of most recent on-site inspection(s)
Date allocation table updated
Are any changes to SIU name, IUP number, pipe number, limits or treatment units?
(Changes do not have to be listed here)
Permit Modifications:
�V D Are any changes to SIU name, IUP number, pipe number, limits or treatment units?
(Changes do not have to be listed here)
I certify that the attached permit(s) has been prepared under my direct supervision and that the permit
meets the requirements of all applicable Federal and State Rules and requirements.
4W Uaatt�_ �U/01/ Ay
Signature of approved permit writer Date
[e-mail] 0125
Email Address: you will receive an email confirmation of receipt Approval number
Streamlined IUP Review Submittal Form: Version 1.0
Revision Dates: 2/16/2011

CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
INDUSTRIAL WASTE SECTION
SIGNIFICANT INDUSTRIAL USER
WASTEWATER DISCHARGE PERMIT
SIU PERMIT NUMBER P074
SOLENIS, LLC
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 NCO0473841
in accordance with the limitations and conditions set forth in this permit.
This permit shall become effective
FEBRUARY 1, 2024
This permit and the authorization to discharge shall
expire at midnight on
AUGUST 31, 2028
or upon permit reissuance, whichever comes first.
a,)q, tjalu-'40� MCI "Ogg
Amy Viginoski Date
Pretreatment Coordinator

Page 2, SIU Permit#P074
SOLENIS, LLC
Effective February i, 2024
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.
February 1, 2024 Permit Modification

Page 3, SIU Permit#P074
SOLENIS, LLC
Effective February i, 2024
SECTION I—PERMIT MODIFICATION HISTORY
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
PERMIT RENEWAL
Page 4, Section II.B.2. —modified pretreatment facilities; Section H.C.
—modified description of monitoring location; Page 5, Section III— 6-
Month Average Flow Limit reduced to 45,000 gpd; Page 6, Section
IV.A.2. —incorporated requirement for flow data submittal by the 15th
September 1, 2008 for the previous month's readings; Section IV.A.3. —modified to specify
reporting period; Section IV.A.4. —modified to include additional
POTW contact information; Page 7-8, Section IV.C. —modified
permittee sampling requirements and due dates and incorporated
requirement to submit written
notice of zero discharge for a reporting period.
Permit Modification
a) 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.3.—changed effluent meter calibration requirement from
July 1, 2011 once per six-month period to once a calendar year; c) Page 6, Section
IV.A.4. - deleted names from permit and included the position titles
only; d) Page 6, Section IV..A.5 - added requirement to notify Water
Customer Service Division of malfunction of effluent billing meter; e)
Page 7, Section IV.C. changed report submittal date to the 15th
PERMIT RENEWAL
September 1, 2013 Section III. —Added Selenium to POTTY sampling; Section IV. Added
Special Condition D (Slug/Spill Control Plan)per DWQ guidance.
Permit Modification
Changed permit from Ashland, Inc. to SOLENIS to reflect new
August 1, 2014 ownership. New owners have no immediate plans to change processes
or personnel.
Section IV, (A) (4) SCADA may be used for flow measurement.
PERMIT RENEWAL
Increased flow from 45,000 gpd to 65,000 gpd per industry request.
September 1, 2018 Special Conditions Changes:Added Flow Measurement Calibration/
Verification Section; Modified Flow Language; Modified Self-
Monitoring requirements to reduce frequency from tvvice per six
months to once per six months.
September 1, 2023 PERMIT RENE TVA L
PERMIT MODIFICATION effective
Section 1- Corrected flow limit typo from 60,000 to 65,000 for
February 1, 2024 September 1, 2018 permit renewal; Section III-Removed perm ittee's
self-monitoring requirements for all parameters except Flow; Section
IV.C. PERNIITTEE SAMPLING AND MONITORING REPORT
SUBMITTAL DATES removed& subsequent sections relabeled.
February 1, 2024 Permit Modification

Page 4, SIU Permit 4P074
SOLENIS, LLC
Effective February i, 2024
SECTION 11 - GENERAL INFORMATION
A. Description of Discharge
Pipe 01 —Process Wastewater from batch and continuous reaction chemical processing from
Plants 1 and 2 (combined discharge).
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.
Flow Equalization
Neutralization
pH adjustment
Screening
Solids Removal
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 south side of Higgins Street, south of Building W-6, across street
from Building 0-3
D. Composite Sampling Technique
A composite sample for the purposes of this permit is:
The automatic sampler shall be used to collect"flow proportional" samples for compliance with
Local Pollutant Allocation parameters over the entire workday [24 hours].
February 1, 2024 Permit ALlodification

Page 5, SIU Permit#P074
SOLENIS, LLC
Effective February i, 2024
SECTION III - EFFLUENT LIMITS AND MONITORING REQUIREMENTS
Effluent Limits and Monitoring Requirements for Pipe 01
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) 65,000 # DAILY
H standard units 5.0— 12.0 Grab 1/ ear
BOD++ m /1 M C 1/ ear
Suspended Solids++ m /1 M C 1/ ear
Cadmium T m /1 M C 1/ ear
Chromium T m /1 M C 1/ ear
Copper T m /1 M C 1/ ear
Lead T) m /1) M C 1/ ear
Nickel T m /1 M C 1/ ear
Zinc T) m /1) M C 1/ ear
Selenium T m /1 M C 1/ ear
Silver T m /1 M C 1/ ear
Cyanide (total) (mg/1) M Grab 1/year
ALL METALS ARE TO BE ANAL YZED AS TOTAL[TJ
#The Greensboro Industrial Waste Section does not consider flow to be a pollutant and
flow data is not considered a report.
++ ALL BOD CONCENTRATIONS OVER 200 mg/l AND ALL TOTAL SUSPENDED
SOLIDS CONCENTRATIONS OVER 200 mg/l ARE SUBJECT TO AN
INDUSTRIAL WASTE SURCHARGE
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]
February 1, 2024 Permit Modification

Page 6, SIU Permit 4P074
SOLENIS, LLC
Effective February i, 2024
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 15t" 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 malfunction/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 tivill 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.
February 1, 2024 Permit lltodifcation

Page 7, SIU Permit 9P074
SOLENIS, LLC
Effective February i, 2024
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. 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").
1 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 ivho 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.
C. 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 Memtek© 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.
Febriaty 1, 2024 Permit Modification

Page 8, SIU Permit#P074
SOLENIS, LLC
Effective February i, 2024
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.
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:
■ 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 I1, 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.
February 1, 2024 Permit Modification