NC0047384_Pretreatment_IUP_SEBrown_Renewal_20240509

CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
INDUSTRIAL WASTE SECTION
SIGNIFICANT INDUSTRIAL USER
WASTEWATER DISCHARGE PERMIT
SIU PERMIT NUMBER P065
SHAMROCK ENVIRONMENTAL CORPORATION
IS AUTHORIZED TO DISCHARGE WASTEWATER
FROM A FACILITY LOCATED AT
6106 CORPORATE PARK DRIVE
BROWNS SUMMIT, 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
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.
ua'6a' 9 303
Amy Va noski Date
Pretreatment Coordinator

Page 2, SIU Permit#P065
SHAMROCK BROWN SUMMIT
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#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
SECTION I—PERMIT MODIFICATION HISTORY
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
September 15, 2001 Page 5—D. Waste/Wastewater Discharge modified to include requirement
for profiling of all wastestreams before discharge to the POTW
PERMIT RENEWAL
May 1, 2003 With inclusion of Compliance Schedule and Centralized Waste Treatment
Categorical limits effective December 22, 2003
May 9, 2003 Permit Modification
Based on Comments from Shamrock[Outlined in Permit Cover Letter]
July 1, 2003 Permit Modification
Based on Comments from Shamrock[Outlined in Permit Cover Letter]
Changes to Section IV- Special Permit Conditions—Flow Measurements
November 15, 2003 due to recent changes in City of Greensboro flow measurement/sampling
requirements
January 1, 2004 Change Section III-Effluent Limitations due to amendment of regulation
by EPA effective December 22, 2003.
Transfer of flow from North Buffalo to T. Z. Osborne. A new lift station,
January 1, 2005 Reedy Fork, was constructed to handle growth on the North side of town.
The North Buffalo facility could not handle the increase inflow.
June 1, 2007 PERMIT RENEWAL
To get Shamrock permit into T. Z Osborne permit renewal cycle
Modifications and correction submitted by Shamrock during the permit
renewal comment period. Section H.B Ammonia stripping moved under
September 1, 2007 incorrect pipe- should be Pipe 02; clarification of monitoring location
tinder Section H. C.; Section III-Sampling frequency for Pipe 01 and Pipe
02 changed to quarterly with the exception of cyanide at Pipe 02.
PERMIT RENEWAL
Section II.B —Pretreatment process modified for clarity of what process
belongs to each pipe; Page 5, Section III— changed from daily maximum
of 150,000 to monthly average of 80,000— cadmium, nickel and cobalt
pollutant limits decreased- changed from daily and monthly average to a
September 1, 2008 daily maximum only based on historical data; Page 6, Section III—
changed from daily maximum of 75,000 to monthly average of 35,000;
Page 7, Section IV.A3—Flow submittal due date incorporated; Section
IV. A.5—added additional contact; Section IV.B. Monitoring Report
Submittal— included requirements when there is no discharge during a
reporting period; Section IV.C. Tanker Wash Records—modified to
include requirements should the tanker wash be used.
Categorical limit concentrations reinstated for nickel, cobalt and
antimony. Limits previously submitted as local limits. Cadmium changed
January 1, 2009 from daily max of 0.050 mg/1 to a daily max. of 0.060 mg/l and a monthly
average of 0.050 mg/1; Page 10.F Waste/Wastewater Receipt
Categorization deleted[Effective 12-22-03]
September 1, 2023 Permit Renewal

Page 3A, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
SECTION I-PERMIT MODIFICATION HISTORY cont'd
DATE MODIFIED REASON & DESCRIPTION OF MODIFICATION OR ACTION
Permit Modification
1) Pages 5a & 5b, Section III-Changed minimum sampling requirement for
July 1, 2011 City to 1/year. 2) Page 6, Section IV.A.4.-changed effluent meter calibration
requirement from once per six-month period to once a calendar year; 3)
Page 6, Section IV.A.5. and 6. - deleted names from permit and included the
position titles only.
Page 5A, Section III-changed monthly average flow from 80,000 gallons
September 14, 2012 per day to 100,000 gallons per day based on past usage and anticipated
growth.
Page 5A, Section III-changed Pipe 01 monthly average flow from 100,000
gallons per day to 125,000 gallons per day based on past usage and
June 14, 2013 anticipated growth. Page 5B, Section III-changed Pipe 02 monthly average
flow from 35,000 gallons per day to 50,000 gallons per day based on past
usage and anticipated growth
PERMIT RENEWAL
Section IV. -Added Special Condition J(Slug/Spill Control Plan)per DWQ
September 1, 2013 guidance; Section III- increased cadmium daily maximum Pipe 01; Added
selenium to Pipe 01 and Pipe 02 POTW monitoring; Changed monitoring
from "quarterly" to 216 months with all samples to be taken in Pt 3 months
of each semi-annual period; Renumbered pages.
Permit Modification
June 6, 2016 Codified and extended temporary Pipe 02 flow increase from 50,000 gpd to
150,000 gpd Monthly Average. Added Ammonia monitoring for Pipe 02.
Permit Modification
April 19, 2018 Set provisional limits for Pipe 01 Cyanide while investigating likely sources
of interference.
PERMIT RENEWAL-
Increased the Cyanide limit on Pipe 01 from 0.05 to 0.50 due to an increase
September 1, 2018 in business activity. Added Ammonia SOP language; Special Conditions
changes:Added Flow Measurement Calibration/ Verification Section;
Modified Flow Language;Added Detection Limits and Matrix Interferences
Section; Added COD Surrogate Sampling Section.
September 1, 2023 PERMIT RENEWAL

Page 4, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
SECTION II - GENERAL INFORMATION
A. Description of Discharge
Pipe 01 —Process Wastewater from 40 CFR Part 437 Subpart A -Metal Bearing Wastes and
Subpart B - Oily Wastes, tanker truck wash, and initial de-emulsification wastewater from
Shamrock Environmental II on Patton Avenue
Pipe 02—Process wastewater from 40 CFR Part 437 Subpart C -Organic Waste
Pipes 01 and 02 do NOT include domestic waste discharge from the facility.
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.
Pipe 01 Pretreatment Processes Pipe 02 Pretreatment Processes
Screening Receiving/Equalization Tanks
Chemical precipitation Ammonia stripping(mobile)
Dissolved Air Flotation (DAF) Sedimentation
Plate and Frame Filter Presses pH Neutralization
Neutralization/pH adjustment Biological Treatment(incidental)
Non-aerated Equalization Tanks
Oil/Water Separator
Clarifiers
Filtration
Flocculation
Sedimentation
Grit 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.

Page 4, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
C. Monitoring Location
Pipe 01 (A&B Wastewaters) Automatic sampler located at the northwest end of the tank farm
(near the discharge flume)just outside the northern corner of the containment wall. When facing
the front of the samplers, the sampler is on the left.
Pipe 02 (C Wastewaters) Automatic sampler located at the northwest end of the tank farm (near
the discharge flume)just outside the northern corner of the containment wall. When facing the
front of the samplers, the sampler is on the right.
Pipe 01 and Pipe 02 do not include domestic wastewaters
D. Composite Sampling Technique
A composite sample for the purposes of this permit for Pipe 01 and Pipe 02 is:
A Flow Proportional Composite sample taken over the entire workday by an automatic sampler
interfaced with the effluent flow meter.
September I, 2023 Permit Renewal

Page 5A, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
SECTION III -EFFLUENT LIMITS AND MONITORING REQUIREMENTS PIPE 01
PIPE 01 IS REGULATED BY THE FEDERAL CATEGORICAL PRETREATMENT
STANDARDS FOR CENTRALIZED WASTE TREATMENT
SUBPART D-MULTIPLE WASTREAMS [A & B] [40 CFR Part 437.46(c)]
EFFLUENT LIMITATIONS MONITORING FREQUENCY
EFFLUENT Daily Monthly Sample PERMITTEE CITY OF
CHARACTERISTICS Maximum Average Type GREENSBORO
Flow (gallons per day) 125,000** # Continuous
H standard units 5.0— 12.0 Grab 1/6 months
BOD ++ m /1 M** C 1/6 months
Suspended Solids++ M** C 1/6 months
Ammonia lbs/da ^^ M** C Profiles^^ 1/6 months
Chemical Oxygen Immediately report all values
Demand m /1 * >10,000 m /L.*
Cadmium Total m /1 0.10 m /l 0.050 m /I C 2/6 months 1/6 months
Chromium Total m /1 0.947 m /l 0.487 m /l C 2/6 months 1/6 months
Copper (Total) m /1 0.405 m /l 0.301 m /l C 2/6 months 1/6 months
Lead Total m /I 0.222 m /l 0.172 mg/1 C 2/6 months 1/6 months
Nickel Total m /I 3.95 m /l 1.45 m /l C 2/6 months 1/6 months
Zinc (Total) (mg/1) 2.87 mg/1 0.641 mg/l C 2/6 months 1/6 months
Silver Total m /1 0.120 m /l 0.0351 m /l C 2/6 months 1/6 months
Cyanide Total m /1 0.50 m /l - Grab 2/6 months 1/6 months
Arsenic Total m /1 0.162 mg/1 0.104 m /l C 2/6 months 1/6 months
Cobalt Total m /1 0.192 m /I 0.124 m /l C 2/6 months 1/6 months
Mercury Total m /1 0.00234 m /l 0.000739 mg/1 C 2/6 months 1/6 months
Antimony Total m /1 0.249 m /l 0.206 m /I C 2/6 months 1/6 months
Titanium Total m /1 0.0947 m /l 0.0618 m /I C 2/6 months 1/6 months
Tin Total m /1 0.409 m /l 0.120 m /l C 2/6 months 1/6 months
Vanadium Total m /1 0.218 m /l 0.0662 m /l C 2/6 months 1/6 months
Bis(2-ethylhexyl) 0.267 mg/l 0.158 mg/l C 2/6 months 1/6 months
phthalate m /1
Carbazole m /1 0.392 m /l 0.233 m /I C 2/6 months 1/6 months
n-Decane m /1 5.79 m /l 3.31 m /l C 2/6 months 1/6 months
Fluoranthene m /1 0.787 m /l 0.393 m /l C 2/6 months 1/6 months
n-Octadecane m /1 1.22 m /l 0.925 m /I C 2/6 months 1/6 months
Selenium (Total) m /1 M C 1/6 months
++ALL BOD CONCENTRATIONS OVER 200 mg/1 AND ALL TOTAL SUSPENDED SOLIDS
CONCENTRATIONS OVER 200 mg/l ARE SUBJECT TO AN INDUSTRIAL WASTE SURCHARGE
#The Greensboro Industrial Waste Section does not consider now to be a pollutant and
flow data is not considered a report.
*See Special Conditions Section: Surrogate Process Control Sampling
^^See Special Conditions Section
** Flow compliance will be based on a combined flow from Pipe 01 and Pipe 02. See
Special Conditions
September 1, 2023 Permit Renewal

Page 5A, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
SECTION III - EFFLUENT LIMITS AND MONITORING REQUIREMENTS PIPE 02
PIPE 02 IS REGULATED BY THE FEDERAL CATEGORICAL PRETREATMENT
STANDARDS FOR CENTRALIZED WASTE TREATMENT
SUBPART C-ORGANICS TREATMENT AND RECOVERY [40 CFR Part 437.351
EFFLUENT LIMITATIONS MONITORING FREQUENCY
EFFLUENT Daily Monthly Sample PERMITTEE CITY OF
CHARACTERISTICS Maximum Average Type GREENSBORO
Flow (gallons per day) 150,000** # Continuous
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
Ammonia lbs/da ^^ M** C Profiles " 1/6 months
Chemical Oxygen Demand Immediately report all
C 1/month*
m /1 * values >10,000 m /L*
Cadmium Total m /1 M C 1/6 months
Chromium Total m /1 M C 1/6 months
Copper Total m /1 M C 1/6 months
Lead Total m /1 M C 1/6 months
Nickel Total m /1 M C 1/6 months
Zinc (Total) (mg/1) M C 1/6 months
Selenium (Total) (mg/1) M C 1/6 months
Silver Total m /1) M C 1/6 months
Cyanide Total m /l M Grab 2/6months 1/6 months
o-Cresol m /1 1.92 mg/1 0.561 mg/1 C 2/6months 1/6 months
-Cresol m /1 0.698 mg/1 0.205 mg/1 C 2/6 months 1/6 months
2,4,6-Trichlorophenol 0.155 mg/1 0.106 mg/1 C 2/6 months 1/6 months
m /I
*See Special Conditions Section: Surrogate Process Control Sampling
++ALL BOD CONCENTRATIONS OVER 200 MGIL AND ALL TOTAL SUSPENDED SOLIDS
CONCENTRATIONS OVER 200 MGIL ARE SUBJECT TO AN INDUSTRIAL WASTE SURCHARGE
""See Special Conditions Section
#The Greensboro Industrial Waste Section does not consider flow to be a pollutant and
flow data is not considered a report.
** Flow compliance will be based on a combined flow from Pipe 01 and Pipe 02. See
Special Conditions
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 or monitoring has been issued for this parameter]
September 1, 2023 Permit Renewal

Page 6, SIU Permit#P065
SHAMROCK BROWN SUMMIT
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 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 Reneival

Page 7, SIU Permit#P065
SHAMROCK BROWN SUMMIT
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. 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.
C. WASTE/WASTEWATER RECORDS
Shamrock Environmental shall keep records on all wastes/wastewaters brought on-site for
pretreatment and discharge. These records shall include:
1. A profile of each waste stream to include laboratory data from either the industry or
Shamrock. This profile shall be completed before any waste stream is discharged to the
City of Greensboro POTW.
2. Source of the waste including company name and address
3. Identity of the waste/wastewater constituents. This information should be verifiable
through laboratory data and documentation from contracted company.
4. Dates of. arrival, storage, treatment and discharge
September 1, 2023 Permit Renewal

Page 8, SIU Permit 4P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
5. Storage and treatment locations and all pretreatment processes employed by Shamrock
Environmental before discharge.
6. Any laboratory analyses conducted on the waste/wastewater before and/or after
treatment.
7. ALL Subpart C wastestreams shall be profiled for Ammonia. Any current Ammonia
Discharge SOP developed by the permittee and approved by the City of Greensboro is
hereby incorporated as a condition of this Significant Industrial User Permit.
D. TANKER WASH RECORDS
Should the tanker wash facility at Shamrock Environmental be used, Shamrock shall maintain
records of all "outside"tankers washed at the truck wash facility. These records shall include:
date and time of washout, product transported/washed from tanker and the initials of the
Shamrock employee who verified the information.
E. 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 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 avvare that there are significant
penalties for submitting false information, including the possibility of fine and
imprisonment for knowing violations.
F. 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.
September 1, 2023 Permit Renewal

Page 9, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
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 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.
G. (1) WASTE/WASTEWATER RECEIPT CATEGORIZATION
When collecting, transporting, storing, treating and discharging wastewater,the Permittee shall
categorize wastewater according to the criteria in this section:
Metals Subcategory Oils Subcategory Organics Subcategory
Spent Electroplating Baths Used Oils Landfill leachate
Spent Electroplating Sludges Oil-water emulsions or Solvent-bearing wastes
mixtures
Metal Finishing Rinse Water Lubricants Still bottoms
Metal Finishing Sludges Coolants Byproduct waste glycols
Contaminated Groundwater Contaminated Groundwater
Chromate Wastes clean-up from petroleum clean-up from by non-petroleum
sources sources
Air Pollution Control Off Specification Organic
Blowdown Water Used petroleum products products
Air Pollution Control System Oil spill clean-up Wastewater from paint washes
Sludges
Spent Anodizing Solutions Wastewater from oil-bearing Wastewater from adhesive or
paint wastes epoxy formulations
Incineration Wastewater Interceptor wastes wastewater from organic
chemical product operations
Cyanide Containing Wastes Off-specification fuels Tank clean out from organic, non-
>136 mg/1 petroleum sources
Waste Acids and Bases [with Non-contact used glycols
metals]
Waste Acids and Bases Tank clean-out from
[without metals] petroleum or oily sources
September 1, 2023 Permit Renewal

Page 10, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
Metals Subcategory Oils Subcategory Organics Subcategory
Vibratory deburring wastewater Aqueous and oil mixtures
from parts cleaning operations
Alkaline and acid solutions
Rinse or wash water from
used to clean metal parts or
petroleum sources
equipment
Cleaning, rinsing and surface
preparation solutions from Underground storage tank
electroplating or phosphating remediation wastes
operations
Waste Liquid Mercury I Bilge water
G. (2) If wastewater is from a source that is not listed in the table above, then the following
criteria apply:
(a) If a wastewater contains oil and grease equal to or greater than 100 mg/l, then the
wastewater is in the Oils Subcategory
(b) If the wastewater contains less than 100 mg/1 of oil and grease and has any of the
following pollutants in the concentrations greater than the listed concentration in the
table below, then the wastewater is in the Metals subcategory:
Metal Concentration
Cadmium 0.2 mg/1
Chromium 8.9 mg/1
Copper 4.9 mg/1
Nickel 37.5 mg/1
(c) If the waste receipt contains oil and grease less than 100 mg/l, and does not have
concentrations of cadmium, chromium, copper or nickel above any of the values
listed above, the waste receipt should be classified in the Organics subcategory.
(d) The criteria and information on subcategory determination are provided as guidance
in proper classification of wastes by subcategory. Where a waste is clearly described
as a specific subcategory waste in Section F. 1), it should be classified as such. If the
waste is not explicitly listed in Section F1, then Section F. (2) should be utilized to
subcategorize unless common sense and best professional judgment by the permittee
warrant classification in another more appropriate subcategory.
(e) For every wastewater shipment discharged by the Permittee,the Permittee shall
maintain records showing the basis for subcategorization.
H. PROHIBITED WASTEWATER
The Permittee may not discharge any wastewater that had a total cyanide concentration greater
than 5.0 mg/l at the time of collection from the source, unless the Permittee segregates this
September I, 2023 Permit Renewal

Page 11, SIU Permit#P065
SHAMROCK BROWN SUMMIT
Effective September 1, 2023
wastewater during collection and transportation and then removes and/or destroys the cyanide
before mixing with any other wastewater discharged to the POTW.
I. SEGREGATION OF WASTEWATERS
Throughout collection, transportation, storage treatment and discharge the Permittee shall
completely segregate the Organic wastestreams from the Multiple wastestreams wastewater
[Metals Wastes and Oily Wastes].
J. DETECTION LIMITS AND MATRIX INTERFERENCES
Proof of efforts to resolve effluent sample detection limits reported higher than permit limits
issued herein [due to matrix interference] shall consist of the information included in"Chapter 1-
Checklist of Laboratory Data Required to Support a Claim that the Permittee was Unable to
Measure Pollutants Due to Matrix Problems" of EPA Guidance on Evaluation, Resolution and
Documentation of Analytical Problems Associated with Compliance Monitoring [EPA
Publication 821-B-93-001 June 1993]. All costs associated with the proof of matrix
interferences, included any third party review of the analytical data and supporting
documentation, shall be the responsibility of the permittee. This shall also include the costs for
any additional procedures, analyses or data review of samples collected by the City of
Greensboro to determine compliance with the permit limits issued herein.
K. SURROGATE PROCESS CONTROL SAMPLING
Chemical Oxygen Demand (COD) sampling shall be performed at least monthly for process
control and POTW loading estimations. COD analyses may be performed in-house or by a
commercial laboratory. If more than one COD analysis is performed in a calendar month, only
the highest COD value need be reported. The six monthly process control COD values shall be
submitted to the Industrial Waste Section by July 15 (for January through June) and by January
15 (for July through December). All COD analyses shall be made available during inspections
and upon request by the IWS.
Any COD value greater than 10,000 mg/l shall be immediately reported(within 24 hours of
becoming aware of the result) to the City of Greensboro Industrial Waste Section. The
notification shall be made by telephone or email to the Pretreatment Coordinator, the
Pretreatment Compliance Specialist and/or the Laboratory and Industrial Waste Section
Supervisor.
L. PIPE 01 and PIPE 02 COMBINED LIMITATION COMPLIANCE CALCULATIONS
Compliance with Flow limitations, BOD allocations, TSS allocations, and Ammonia 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, total effluent TSS, and
total effluent Ammonia loading is not to exceed combined total allocations for both pipes.
September 1, 2023 Permit Renewal