NC0047384_Pretreatment_IUP_SEPatton_Renewal_20240509

CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
INDUSTRIAL WASTE SECTION
SIGNIFICANT INDUSTRIAL USER
WASTEWATER DISCHARGE PERMIT
SIU PERMIT NUMBER P068
SHAMROCK ENVIRONMENTAL II
IS AUTHORIZED TO DISCHARGE WASTEWATER
FROM A FACILITY LOCATED AT
519 PATTON AVENUE
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.
/&/w3
Amy V noski Date
Pretreatment Coordinator

Page 2, SIU Permit#P068
SHAMROCK II—PATTON AVENUE
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#P068
SHAMROCK II—PATTON AVENUE
Effective September 1, 2023
SECTION I— PERMIT MODIFICATION HISTORY
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
February 1, 2003 New SIU Permit—Shamrock Environmental is leasing the facility
formerly known as Four Seasons Environmental
PERMIT RENEWAL
September 1, 2003 Permit Renewal 30-Day Comment Period: Reduced Self-monitoring
Requirements on pages 6 and 7.
Change location where flow readings are to be taken and where
October 1, 2004 compliance flows are to be taken during malfunction/failure of effluent
meter[Section IV- C.3 and C.5]. This change is being made due to
problems with the effluent flow meter.
November 19, 2004 Changed expiration date on cover page, typographical error.
Expiration date should be 2008 and not 2003.
Industry has performed sampling weekly for copper and mercury and
January 1, 2005 has not violated their permit limitations. Page 7, changes Permittee
monitoring frequency on copper and mercury from weekly to monthly.
PERMIT RENEWAL
Page 5, Section IL C. —modification of description of monitoring
location; Page 6, Section III—Daily Maximum flow limit changed to
Monthly Average limit of 30,000 gpd; Page 7, Section IV.B.3. —
September 1 2008 incorporated requirement for flow data submittal by the 15th for the
' previous month's readings; Section IV.B.4. —modified to specify
reporting period;
Section IV.B.5. —modified to include additional POTW contact
information; Page 9, Section IV.C. —incorporated requirement to notify
POTW in writing in the event of zero discharge for a reporting period.
1) Modified Section ILA. to include boiler and cooling tower feed to
January 2, 2009 discharge per PERCS review letter dated 8128108; 2) Modified to
change monitoring from monthly to quarterly for copper and mercury
Permit Modification
1) Page 5, Section III—Increased Flow to 35,000 gpd monthly average
due to increased operations; Changed minimum sampling requirement
July 1, 2011 for City to 1/year. 2) Page 6, Section IV.B.4. — changed effluent meter
calibration requirement from once per six-month period to once a
calendar year; 3) Page 6, Section IV.B. 5 and 6. - deleted names from
permit and included the position titles only.
PERMIT RENEWAL
September 1, 2013 Section IV. -Added Special Condition F(Slug/Spill Control Plan)per
DWQ guidance; Section III—Modified self-monitoring requirements,
added selenium to POTW monitoring.
PERMIT RENEWAL
September 1, 2018 Special Condition Changes: Added Flow Measurement Calibration/
Verification Section, Modified flow language
September 1, 2023 Permit Renewal

Page 3A, SIU Permit#P068
SHAMROCK II—PATTON AVENUE
Effective September 1, 2023
SECTION I— PERMIT MODIFICATION HISTORY cont'd
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
PERMIT MODIFICATION
March 15, 2022 Section III —Increased flow limit to 50,000gpd due to increased
operations.
September 1, 2023 PERMIT RENEWAL
September 1, 2023 Permit Renewal

Page 4, SIU Permit#P068
SHAMROCK II—PATTON AVENUE
Effective September 1, 2023
SECTION II - GENERAL INFORMATION
A. Description of Discharge
Pipe 01 —Process Wastewater from cleaning of transport tankers, storage tanks,tote tanks,
boiler and cooling tower blowdown.
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.
Grit Removal Oil/Water Separator
pH adjustment/Neutralization Spill Protection
Filtration Screening
Sedimentation Solids Removal
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
Manhole on southeast corner of Tank Wash Bay#1 on the north side of and adjacent to Fieldcrest
Drive
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 a refrigerated
automatic sampler interfaced with the effluent flow meter.
September 1, 2023 Permit Renewal

Page 5, SIU Permit#P068
SHAMROCK II —PATTON AVENUE
Effective September 1, 2023
SECTION III - EFFLUENT LIMITS AND MONITORING REQUIREMENTS
PIPE 01
THIS FACILITY IS REGULATED BY THE FEDERAL CATEGORICAL
PRETREATMENT STANDARDS FOR TRANSPORTATION EQUIPMENT CLEANING
[40 CFR PART 442.15—SUBPART A]
EFFLUENT LIMITATIONS MONITORING FREQUENCY
EFFLUENT Daily Monthly 6-Month Sample PERMITTEE CITY OF
CHARACTERISTICS Maximum Average Average Type GREENSBORO
Flow (gallons per day) 50,000 # DAILY
H Standard Units 5.0 - 12.0 Grab I/ ear
BOD++ m /1 M C 2/6 months I/ ear
Suspended Solids++ (mg/1) M C 2/6 months 1/year
Cadmium T m /1 M C 2/6 months 1/ ear
Chromium (T) (mg/1) M C 2/6 months I/year
Copper T m /1 M C 2/6 months 1/ ear
Lead T m /1 M C 2/6 months 1/ ear
Nickel T m /1 M C 2/6 months 1/ ear
Zinc T m /1 M C 2/6 months 1/ ear
Silver T m /1 M C 2/6 months 1/ ear
Selenium T m /1 M C 1/ ear
Cyanide total m /1 M Grab 1/6 months 1/ ear
Mercury T m /1 M C 2/6 months 1/ ear
Non-Polar Material [SGT- M Grab 2/6 months 1/year
HEM],' m /1
ALL METALS ARE TO BE ANAL YZED AS TOTAL IT]
# The Greensboro Industrial Waste Section does not consider Flow to be a pollutant and
flow data is not considered to be a report.
'Silica Gel Treated Hexane Extractable Material (analyzed using EPA Method 1664)
++All BOD concentrations over 200 mg/1 and all Total Suspended Solids concentrations
over 200 mg/1 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]
September 1, 2023 Permit Renewal

Page 6, SIU Permit#P068
SHAMROCK II —PATTON AVENUE
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 15th 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 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#P068
SHAMROCK II—PATTON AVENUE
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. CENTRALIZED WASTE TREATMENT OPERATIONS
Shamrock shall account for all Centralized Waste Treatment wastestreams processed on-site to
prove that no CWT wastewater is discharged from this facility. Records shall be maintained and
available upon request to the POTW.
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 tinder penalty of law that this document and all attachments were prepared tinder
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]
D. POLLUTANT MANAGEMENT PLAN
Shamrock Environmental shall implement the current approved Pollutant Management Plan
[required by 40 CFR Part 442.15 (b) (1) and described in 40 CFR Part 442.15 (b)(1-5)] on file
with the City of Greensboro Industrial Waste Section. This Plan and any subsequent Plan
modifications are hereby established as a condition of this Significant Industrial User Permit and
shall be enforceable as such by the POTW.
Failure to implement the Pollutant Management Plan may result in the Federal Categorical
Standards in 40 CFR Part 442.15 (a) being placed in this Significant Industrial User Permit.
September L, 2023 Permit Renewal

Page 8, SIU Permit#P068
SHAMROCK II—PATTON AVENUE
Effective September 1, 2023
E. 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 an 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.
F. 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 (either total gallon calculation or deduct) 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#P068
SHAMROCK II —PATTON AVENUE
Effective September 1, 2023
The following floiv 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.
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 or deduct meter are not required to have the
meters calibrated.
Industries with an electronic data base with power back do not need to maintain redundant
paper recorders.
September 1, 2023 Permit Renewal