NC0023884_Industrial User_20211122

ij
November 15, 2021 C 1 ,
Mr. Michael Montebello RECE� V ED
NC Division of Water Resources NOV 2 2 2021
Water Quality Permitting
Municipal Unit-Permitting NCDEQ/DW�NPDES
1617 Mail Service Center
Raleigh,NC 27699-1617
Re: Transmittal of Permit:
0039- Hexagon Agility
Dear Mr. Montebello:
Please find enclosed the following permit and the reason for reissuing.
IUP Reason for Reissuing
0039-Hexagon Agility Permit Renewal
If you need any additional information, or have any questions,you may contact me at (704) 638-
5375.
Sincerely,
Jeffery A Greer
Pretreatment Program Coordinator
ENCLOSURES
CC:PT files
1915 Grubb Ferry Road Salisbury-Rowan Utilities Telephone[phone]
Salisbury,NC 28144 Environmental Services Division Fax [phone]

SaILs4uyIwan
UT/LIT/ES
November 15, 2021
Ms. Lyndi Boone
Hexagon Agility
1010 Corporate Center Drive
Salisbury,NC 28146
Subject: Renewal of Pretreatment Discharge Permit#0039
Hexagon Agility
Dear Ms. Boone:
You will find enclosed Hexagon Agility's Pretreatment discharge permit#0039 located in Salisbury NC,
Rowan County.
The permit renewal includes the following changes:
• Added Aluminum as a monitored parameter per a 2/6 self-monitoring frequency on the Effluents
Limits Table.
• Removed Mercury from the Effluent Limits Table.
• Removed all language in Part III Specific Conditions pertaining to Total Mercury.
Please read this permit carefully so that you will be fully aware of these changes. It is the permittee's
responsibility to do so, and to fully comply with all of the permit's requirements.
If any requirements contained in this permit are unacceptable, you have the right to an adjudicatory
hearing upon written request within thirty (30)days following the receipt of this letter. Unless such
demand is made,the provisions of the enclosed permit shall be final and binding.
If you have questions regarding this permit or related matters,please do not hesitate to contact me or
Sonja Basinger at(704) 638-5375.
S. cerely,
•
/Je ry A Greer
Pretreatment Coordinator
Enclosures
1915 Grubb Ferry Road Salisbury-Rowan Utilities Telephone[phone]
Salisbury,NC 28144 Environmental Services Division Fax [phone]

Salisbury-awe/1
PERMIT
INDUSTRIAL USER PRETREATMENT PERMIT(IUP)TO DISCHARGE WASTEWATER
UNDER THE CITY OF SALISBURY INDUSTRIAL PRETREATMENT PROGRAM
0039 433.17
IUP Number 40 CFR Category
In compliance with the provisions of North Carolina General Statute 143-215.1, any applicable Federal categorical
pretreatment regulations, all other lawful standards and regulations promulgated and adopted by the North Carolina
Environmental Management Commission, and the City of Salisbury Sewer Use Ordinance. The following industry,
hereafter referred to by name or as the permittee:
Industry Name,Permittee: Hexagon Agility
SIC Code: 3714
Facility Location: 1010 Corporate Center Drive
Mailing Address: 1010 Corporate Center Drive
Salisbury
North Carolina 28146
Contact&Phone: Ms.Lyndi Boone(704)870-7506
Alternate Contact&Phone: Mr.Steve Engstrom(704)870-3513
is hereby authorized to discharge wastewater from the facility located at the above listed address into the sanitary sewer
collection system and the Town Creek Wastewater Treatment Train of the City of Salisbury listed below:
Name of City Facility: City of Salisbury WWTP
Name of Treatment Train Town Creek Treatment Train
NPDES Number: NC0023884
Treatment Facility Physical Location 850 Heiligtown Road
East Spencer, NC 28039
in accordance with effluent limitations,monitoring requirements, and all other conditions set forth in Parts I, II, and III of
this Industrial User Pretreatment Permit(IUP).
This permit and the authorization to discharge shall become effective at midnight on:
January 1, 2022
This permit and the authorization to discharge shall expire at midnight on:
December 31, 2027
yI
N01/EM SE1�- 1 D Wi 1 .
Date Signed Sonja/ inger, nviro ental Services Manager
SIU CODE: HXA
IUP No.0039
Page 1 of 17

Part I
Specific Conditions
A. IUP Basic Information:
Receiving Control Authority&WWTP Name: POTW NPDES#:
City of Salisbury/Town Creek WWTT NC0023884
IUP Name: IUP Number:
Hexagon Agility 0039
IUP Effective Date: Pipe Number:
January 1,2022 01
IUP Expiration Date: IUP 40 CFR#:
December 31, 2027 433.17
B. IUP Modification History:
Effective Date Renewal or Modification Description of changes over previous IUP
01/04/2017 New permit issued IU's initial issuance of Pretreatment Permit
09/19/2018 Modification IU business name change
11/13/2020 Modification Contact name change to Julian Mercer and Alternate
contact name change to Bryan Mewhort.Changed
language in Part III Specific Conditions Section 2.
Total Mercury to reflect test method EPA 1631E will
be used for mercury monitoring and changed the
minimum quantitation detection level to 1 ng/L.
Removed IU self-monitoring 1/6 frequency for
Mercury on the Effluent Limits Table.
4/15/2021 Modification IU Business name change from Agility Fuel Solutions
To Hexagon Agility;Contact name change from Julian
Mercer to Lyndi Boone and Alternate name change
from Bryan Mewhort to Steve Engstrom.
01/01/2022 Renewal Removed Self-monitoring for Mercury on Effluents
Limits Table;Removed all Mercury sampling
Requirement language from Part III Special
Conditions 2.Total Mercury;Added Aluminum
as a Monitored parameter per a 2/6 industry self-
monitoring frequency on the Effluent Limits Table.
SIU CODE: HXA IUP No.0039
Page 2 of 17

Part I
Specific Conditions
C. 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 the Town Creek Wastewater Treatment Train of the City of Salisbury.
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 units listed on both the application and inspection
forms.
IU Treatment Units
1. Five-stage wash: la+ lb)Caustic
wash;2)RO wash;3)RO wash;4)Acid
wash;5)RO wash
2. Final pH adjustment(tank with
160 gallon capacity)
3. Inline flow meter
3) The permittee is hereby authorized to, if required by the City of Salisbury, and after receiving Authorization to
Construct (A to C) from the City, construct and operate additional pretreatment units as needed to meet the effluent
limitations.
D. Description of IUP Discharge(s):
Pipe 01 Discharge Point
Batch Discharger-all process wastewaters from metal finishing operations,RO backwash
and non-contact wastewaters.
SIU CODE: HXA IUP No.0039
Page 3 of 17

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Part I
Specific Conditions
F: Effluent Limits and Monitoring Reciuirements:
EFFLUENT LIMITS TABLE I - Pipe #01
WWTP Treatment Train: Town Creek Treatment Train SIU Name: Hexagon Agility
POTW: City of Salisbury
POTW NPDES#:NC0023884 Permit#: 0039
Effective Date: January 1,2022 Pipe#: #01
Expiration Date: December 31, 2027 40 CFR#: 433.17
THE LIMITS IN THIS TABLE ARE: DISCHARGE FLOW LIMITS
1)Limits for the Entire Permit Period. X Daily Maximum Monthly Avg.
2)Interim Limits for Period#1:
3)Interim Limits for Period#2: 35,000 gpd ---------
4)Final Limits
1. pH Limit-The pH of this discharge, identified by the pipe number indicated above, shall be within the range of 6.00 to
10.00 standard units at all times.
2. Temperature Limit-The temperature of the discharge, identified by the pipe number stated above, shall be less than
65.5 degrees Celsius at all times.
Limited Parameter Daily Industry POTW Sample Laboratory
and Maximum Monitoring Monitoring Collection Detection Level
Units Limit Frequency Frequency Method
Flow,MGD 0.035 *Daily 1/12 Discharge flow meter
pH,s.u.(1) *Daily 1/12 Grab
Temperature,Celsius(2) *Daily 1/12 Grab
Cadmium,mg/L 0.07 2/6 1/12 Grab 0.50 ug/L
Chromium,mg/L 1.71 2/6 1/12 Grab 10.0 ug/L
Copper,mg/L 2.07 2/6 1/12 Grab 2.0 ug/L
Cyanide,mg/L 0.65 2/6 1/12 Grab 10.0 ug/L
Lead,mg/L 0.43 2/6 1/12 Grab 2.0 ug/L
Nickel,mg/L 2.38 2/6 1/12 Grab 5.0 ug/L
Silver,mg/L 0.24 2/6 1/12 Grab 1.0 ug/L
Zinc,mg/L 1.48 2/6 1/12 Grab 10.0 ug/L
Aluminum,mg/L Monitor 2/6 1/12 Grab 20.0 ug/L
TTO,mg/L*** 2.13 1/6 1/12 Grab
*Record flow meter reading daily.Monitor and record pH and Temperature each day in which a wastewater
discharge occurs.
***Refer to Part III,Special Conditions,5-7
There shall be no discharge of floating solids or visible foam in other than trace amounts.
SIU CODE: HXA IUP No.0039
Page 5 of 17

Part I
Specific Conditions
G. Definitions and Limit Page(s)notes:
In addition to the defmitions in the City of Salisbury Sewer Use Ordinance,the following definitions and requirements
apply:
a. The"City" when referred to in the text of this permit shall mean the Environmental Services Division of Salisbury-
Rowan Utilities.
b. "Daily" shall mean any day or any part of a day during which the permittee's process operates or on which a
wastewater discharge occurs.
c. A "grab sample," for monitoring requirements, shall mean a single "dip and take" sample, not exceeding fifteen
minutes total collection time,taken at a representative point in the discharge stream.
d.A "composite sample," for monitoring requirements of this IUP, is defined as the automatic or manual collection of
one grab sample of constant volume,not less than 100 ml,collected every hour during the entire discharge period of 24
hours. Sampling day shall be a typical production,and discharge day.
e. A "daily average" shall mean the sum of all values obtained for a parameter in any twenty-four hour period divided
by the number of results for that parameter from analysis of samples collected during that twenty-four hour period.
f.A "daily maximum" shall mean the largest numerical result obtained for a parameter in any twenty-four hour period,
from analysis of samples collected during that twenty-four hour period.
g.A"four-day average"for a parameter shall mean the average value obtained for a parameter from a minimum of four
individual composite samples collected within the same calendar month.
h. A "monthly average" shall mean the sum of all values obtained for a parameter in a calendar month, divided by the
number of results for that parameter in that calendar month.
i. A "sampling event" shall mean the collection of a grab or composite sample at the discharge point(s) described in
Part I.A.of this permit and the proper preservation of those samples during and after collection.
j. A "monitoring event" shall mean a sampling event, followed by proper analysis of the samples collected within the
regulated holding time, completion of required chain-of-custody, IDMR forms, and other documentation, and filing
with the Environmental Services Division the required analytical reports by the applicable deadline(reference General
Conditions Part 2).
k. "TTO"or"Total Toxic Organics"shall mean the sum of the concentrations of the toxic organic compounds listed in
40 CFR 433.11 (e)that apply to the permittee's process discharge.
1. "Toxicity" shall mean the qualitative characteristic of a discharge which is measured by the bioassay procedure
currently approved by the State of North Carolina which uses live Ceriodaphnia to indicate the presence or absence of
toxic substances in wastewater discharges.
m. "Priority Pollutants" shall mean those organic chemicals, metals, and other substances defined in the Federal
Register 40 CFR Part 122,Appendix D.
n.The"Semi-Annual Report Periods"shall mean the intervals of January through June,and July through December of
each year.
o. The term "Sewer Use Ordinance" shall mean the most recent revision of those parts of the City of Salisbury's
Utilities Ordinance which regulate discharges to the City of Salisbury collection system, particularly Chapter 25,
Article VIII,Sewer Use Regulations.
SIU CODE: HXA IUP No.0039
Page 6 of 17

Part I
Specific Conditions
p. A "slug" or "slug discharge" is any discharge of a non-routine, episodic nature, including but not limited to an
accidental spill or a non-customary batch discharge.
q. A "three-day average" for a parameter shall mean the average value obtained for a parameter from a minimum of
three individual composite samples collected within the same calendar month.
-Definitions of Monitoring Frequency-
A monitoring frequency of 1/12 when applied to monitoring of SIU's by the City shall mean a minimum of one
monitoring event during a calendar year.
Monitoring frequency for industrial dischargers is designated as a fraction of each semi-annual report period. The
fractional designations used in this permit shall have the following meanings when applied to self-monitoring by SIU's.
1. 1/6 Shall mean one monitoring event during January or February and one monitoring event during July or August.
2.2/6 Shall mean one monitoring event during each calendar month of January,February,July,and August.
3.3/6 Shall mean one monitoring event during each calendar month of January,February,March,July,August,
and September.
4.4/6 Shall mean one monitoring event during each calendar month of January,February,March,April,July,
August,September,and October.
5.5/6 Shall mean one monitoring event during every calendar month except the months of June and December.
6.6/6 Shall mean one monitoring event during every calendar month.
7. 1/12 Shall mean one monitoring event during each calendar year,with that monitoring event being completed
during one of the following months:January,February,March,July,August,or September.
SIU CODE: HXA IUP No.0039
Page 7 of 17

PART II
General Conditions
Part II General Conditions Outline:
1. Representative Sampling 16. Federal and/or State Laws
2. Reporting 17. Penalties
3. Test Procedures 18. Need to Halt or reduce
4. Additional Monitoring by Permittee 19. Transferability
5. Duty to Comply 20. Property Rights
6. Duty to Mitigate 21. Severability
7. Facilities Operation,Bypass 22. Modification,Revocation,Termination
8. Removed Substances 23. Reapplication
9. Upset Conditions 24. Dilution Prohibition
10. Right of Entry 25. Reports of Changed Conditions
11. Availability of Records 26. Construction of Pretreatment Facilities
12. Duty to provide Information 27. Reopener
13. Signatory Requirements 28. Categorical Reopener
14. Toxic Pollutants 29. General Prohibitive Standards
15. Civil and Criminal Liability 30. Reports of Potential Problems
1. Representative Sampling
Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored
discharge. All samples shall be taken at the monitoring points specified in this permit and, unless otherwise specified,
before the effluent joins or is diluted by any other wastestream,body of water,or substance.Monitoring points shall not
be changed without notification to and approval by,the permit issuing authority.
2. A. Reporting
1)Monitoring results obtained by the permittee shall be summarized and reported on Indirect Discharge Monitoring
Report Forms(IDMR),postmarked no later than the last calendar day following the month in which the samples
were taken. If no discharge occurs during a calendar month in which a sampling event was to have occurred,an
IDMR form with the phrase"no discharge"shall be submitted for that month.Copies of these and all other reports
required herein shall be submitted to the following address:
Salisbury-Rowan Utilities
Environmental Services Division
Pretreatment Program Coordinator
1915 Grubb Ferry Road
Salisbury,N.C.28144-1248
2)If the sampling performed by the permittee indicates a violation,the permittee shall notify the City within 24
hours of becoming aware of the violation.The permittee shall also repeat the sampling and analysis and submit the
results of the repeat analysis to the City within 30 days after becoming aware of the violation.
B. Flow Measurement Reporting Requirements:
1.Measurement Frequency and Reporting
q Y P g
a) The flow measurement frequency for each discharge point regulated by this permit is batch.
b) The total discharge volume from each sampling event shall be recorded in gallons per day or million
gallons per day and shall be reported to the City in those units along with the analytical data from the
sampling event.A State-approved Indirect Discharge Monitoring Report(IDMR)form shall also be submitted
for each sampling event. The flow recorded during the sampling event shall be converted to thousands of
gallons per day,and shall be indicated in those units on the IDMR form.
SIU CODE: HXA IUP No.0039
Page 8 of 17

PART II
General Conditions
c) During every calendar month, the permittee shall maintain a log of readings from the totalizer of each
discharge flow meter. The permittee shall record a totalizer entry for each day of the month that a discharge
occurred. For any day during which a totalizer reading did not increase, a notation shall be made on the log
indicating the reason there was no change. Daily totalizer readings shall be recorded at 24 hour intervals,
within+/- 1.0 hours of a regular time established by the permittee.
d) The permittee shall submit to Environmental Services postmarked no later than the 7th of each month,
copies of all totalizer logs compiled during the previous month. Each monthly log submitted must clearly
show the meter manufacturer's name, the serial number of the device, the original date of installation, the
units of flow(gallons,cubic feet,etc.),and the factor by which the difference in consecutive totalizer readings
must be multiplied to obtain the actual volume discharged. Logs may be faxed or emailed to the
Pretreatment Program Coordinator.
e) Permittee shall also show on each monthly log, a calculation of: (a) The total flow from the first day of
each month through the first day of the following month,and(b)The total flow for each 24 hour period.The
calculated flow must be converted by the permittee to units of gallons or million gallons as appropriate.
C. Calibration of Flow Measurement Devices
Each permittee required to measure discharge flow must consistently maintain such equipment in operating
condition and within design accuracy specifications. Calibration shall be performed at least once during each
semi-annual report period.
D. Semi-Annual Reports-Requirements for Industrial Dischargers:
The permittee,whether subject to Federal categorical standards or not[40 CFR 403.12(e)&40 CFR 403.12(h)],
shall submit Semi-Annual Reports covering the months of January through June, and the months of July through
December. The report for the period of January through June shall be postmarked no later than July 10th. The
report for July through December shall be postmarked no later than January 10th,and must contain the following
information listed below.
I.Non-Categorical Dischargers shall submit:
(a)A description of the nature, concentration, and flow rate for any new or previously unreported discharge
containing any substance limited by this permit or prohibited by the Salisbury Sewer Use Ordinance.
(b)The results of any monitoring in excess of that required by this permit, if the results were determined by a
North Carolina certified laboratory. Monitoring results obtained from a laboratory not certified by the state of
North Carolina must also be reported, but the wording "Non-certified results" must be clearly indicated on
each page of data submitted.
(c)A written description of any change or modification to the permittee's pretreatment process equipment that
has not previously been submitted in writing.
(d)A report of any increase or decrease in average water consumption of more than ten percent of the amount
consumed during the previous semi-annual report period.
(e)A report of any change in production rate that amounted to more than ten percent of the rate during the
previous semi-annual report period.
(f) A report containing a description of any unreported modification of manufacturing facilities that has
occurred since the last semi-annual report, if that modification had the potential of affecting any wastewater
discharged by the permittee.
SIU CODE: HXA IUP No.0039
Page 9 of 17

PART II
General Conditions
(g) Copies of Material Safety Data Sheets not previously submitted for any substance present on the
permittee's premises during the period covered by the report, if that substance contains pollutants limited by
this permit or prohibited by the Salisbury Sewer Use Ordinance.
(h) At least once during the six-month period covered by each semi-annual report, a letter, calibration
certificate, or similar documentation signed by a qualified professional who has the ability to calibrate the
permittee's discharge flow monitoring equipment to design accuracy specifications. The documentation
submitted shall also indicate whether any adjustment was required to bring the flow measurement system
within specifications.
2.Categorical Dischargers shall submit:
In addition to the above reporting requirements for non-categorical dischargers, the permittee whose process is
subject to Federal categorical production-based limits shall keep records of average daily production rates for that
categorical process.The permittee shall include a summary of average production rates in each semi-annual report.
The average production rate that is reported shall be based on the past two six-month compliance periods. The
months on which the permittee bases the average production rates must be clearly noted on the production report.
3. Test Procedures
Test procedures for the analysis of pollutants shall be performed in accordance with the techniques prescribed in 40
CFR Part 136 and amendments thereto unless specified otherwise in the monitoring conditions of this permit. In
addition,the test procedure shall be conducted utilizing recognized techniques that will produce the lowest practical
detection limit for each analyte and sample matrix.
4. Additional Monitoring by Permittee
If the permittee monitors any pollutant at the location(s)designated herein(Pipe 01)more frequently than required
by this permit,using approved analytical methods as specified above,the results of such monitoring shall be
submitted to the City.The City may require more frequent monitoring,or the monitoring of other pollutants not
required in this permit by written notification.
5. Duty to Comply
The permittee must comply with all conditions of this permit.Any permit noncompliance constitutes a violation of
the City of Salisbury Sewer Use Ordinance and is grounds for possible enforcement action.
6. Duty to Mitigate-Prevention of Adverse Impact
The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this permit,which
has a reasonable likelihood of adversely affecting human health,the POTW,the waters receiving the POTW's
discharge,or the environment.
7. Facilities Operation,Bypass
The permittee shall at all times maintain in good working order and operate as efficiently as possible,all control
facilities or systems installed or used by the permittee to achieve compliance with the terms and conditions of this
permit.Bypass of treatment facilities is prohibited except when approved in advance by the City. Bypass approval
shall be given only when such bypass is in compliance with 40 CFR 403.17.
8. Removed Substances
Solids,sludges,filter backwash,or other pollutants removed in the course of treatment or control of wastewaters
shall be disposed of in a manner such as to prevent any pollutants from such materials from entering the sewer
system. The permittee is responsible for assuring its compliance with any requirements regarding the generation,
treatment,storage,and/or disposal of"Hazardous waste"as defined under the Federal Resource Conservation and
Recovery Act.
SIU CODE: HXA IUP No.0039
Page 10 of 17

PART II
General Conditions
9. Upset Conditions
An"upset"means an exceptional incident in which there is an unintentional and temporary noncompliance with the
effluent limitations of this permit because of factors beyond the reasonable control of the permittee.An upset does
not include noncompliance to the extent caused by operational error,improperly designed or inadequate treatment
facilities,lack of preventative maintenance,or careless or improper operations.
An upset may constitute an affirmative defense for action brought for the noncompliance.The permittee has the
burden of proof to provide evidence and demonstrate that none of the factors specifically listed above were
responsible for the noncompliance.
10. Right of Entry
The permittee shall allow the staff of the State of North Carolina Department of Environmental Quality,Division of
Water Resources,the Regional Administrator of the Environmental Protection Agency,the City and/or their
authorized representatives,upon the presentation of credentials:
1)To enter upon the permittee's premises where a real or potential discharge is located or in which records are
required to be kept under the terms and conditions of this permit;and
2)At reasonable times to have access to and copy records required to be kept under the terms and conditions of this
permit;to inspect any monitoring equipment or monitoring method required in this permit;and to sample any
discharge of pollutants.
11. Availability of Records and Reports
The permittee shall retain records of all monitoring information,including all calibration and maintenance records as
well as copies of reports and information used to complete the application for this permit for at least three years. All
records that pertain to matters that are subject to any type of enforcement action shall be retained and preserved by
the permittee until all enforcement activities have concluded and all periods of limitation with respect to any and all
appeals have expired.
These,and any other records and data maintained by the permittee which provide information related to the
operation of the permittee's pretreatment system or which may influence the quality of the permittee's discharge,
shall be made available by the permittee during inspections by the City;the Department of Environmental Quality;
and by the Environmental Protection Agency.
Except for data determined to be confidential under the Sewer Use Ordinance,all reports prepared in accordance
with the terms of this permit shall be available for public inspection at the Environmental Services Division Office.
As required by the Sewer Use Ordinance,effluent data shall not be considered confidential.
12. Duty to Provide Information
The permittee shall furnish to the Utilities Director or his/her designees,within a reasonable time,any information
which the Director,his/her designee,or the Division of Water Resources may request to determine whether cause
exists for modifying,revoking and reissuing,or terminating this permit or to determine compliance with this permit.
The permittee shall also furnish,upon request,copies of records that are required to be kept by this permit.
13. Signatory Requirements
All reports or information submitted pursuant to the requirements of this permit must be signed and certified by the
Authorized Representative as defined under the Sewer Use Ordinance.If the designation of an Authorized
Representative is no longer accurate because a different individual or position has responsibility for the overall
operation of the facility,or overall responsibility for environmental matters for the company,a new authorization
satisfying the requirements of this section must be submitted to the Utilities Director prior to or together with any
reports to be signed by an authorized representative.
SIU CODE: HXA IUP No.0039
Page 11 of 17

PART II
General Conditions
14. Toxic Pollutants
If a toxic effluent standard or prohibition(including any schedule of compliance specified in such effluent standard
or prohibition)is established under Section 307(a)of the Federal Clean Water Act for a toxic pollutant which is
present in the discharge and such standard or prohibition is more stringent than any limitation for such pollutant in
this permit,this permit may be revised or modified in accordance with the toxic effluent standard or prohibition and
the permittee so notified.
15. Civil and Criminal Liability
Nothing in this permit shall be construed to relieve the permittee from civil or criminal penalties for noncompliance.
16. Federal and/or State Laws
Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from
any responsibilities,liabilities,or penalties established pursuant to any applicable Federal and/or State law or
regulation,which includes the City of Salisbury Code of Ordinances.
17. Penalties
The Sewer Use Ordinance of the City of Salisbury provides that any person who violates a permit condition is
subject to a civil penalty not to exceed$25,000 dollars per day of such violation.
Under state law,(NCGS 143-215.6B),under certain circumstances it is a crime to violate terms,conditions,or
requirements of pretreatment permits.It is a crime to knowingly make any false statement,representation,or
certification in any record or other document submitted or required to be maintained under this permit,including
monitoring reports or reports of compliance or noncompliance.These crimes are enforced at the prosecutorial
discretion of the local District Attorney.
18. Need to Halt or Reduce not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or reduce
the permitted activity to maintain compliance with the conditions of the permit.
19. Transferability
This permit shall not be reassigned or transferred or sold to a new owner,new user,different premises,or a new or
changed operation without approval of the City.
20. Property Rights
This permit does not convey any property rights in either real or personal property,or any exclusive privileges,nor
does it authorize any injury to private property or any invasion of personal rights,nor any infringement of Federal,
State or local laws or regulations.
21. Severability
The provisions of this permit are severable and,if any provision of this permit or the application of any provision of
this permit to any circumstance is held invalid,the application of such provision to other circumstances and the
remainder of this permit shall not be affected thereby.
22. Permit Modification,Revocation,Termination
This permit may be modified,revoked and reissued or terminated with cause in accordance to the requirements of
the City of Salisbury Sewer Use Ordinance and North Carolina General Statute or implementing regulations.
SIU CODE: HXA IUP No.0039
Page 12 of 17

PART II
General Conditions
23. Re-Application for Permit Renewal
The permittee is responsible for filing an application for re-issuance of this permit at least 90 days prior to its
expiration date. One TTO analysis is required to be submitted with every permit renewal application.
24. Dilution Prohibition
The permittee shall not increase the use of potable or process water or in any other way attempt to dilute the
discharge as a partial or complete substitute for adequate treatment to achieve compliance with the limitations
contained in this permit.
25. Reports of Chanced Conditions
The permittee shall give notice to the City of any planned significant changes to the permittee's operations or
system,which might alter the nature,quality,or volume of its wastewater at least 90 days before the change.The
permittee shall not begin the changes until receiving written approval from the City.Also see Part II,Section 30 of
this permit for additional reporting requirements for spill/slug issues.
Significant changes may include but are not limited to:
(a) increases or decrease to production;
(b) increases in discharge of previously reported pollutants;
(c) discharge of pollutants not previously reported to the City;
(d) new or changed product lines;
(e) new or changed manufacturing processes and/or chemicals;or
(f) new or changed customers.
26. Construction
No construction of pretreatment facilities or additions thereto shall be begun until Final Plans and Specifications
have been submitted to the City and written approval and an Authorization to Construct(A to C)have been issued.
27. Reopener
This permit shall be modified or,alternatively,revoked and reissued to comply with any applicable effluent standard
or limitation for the control of any pollutant shown to contribute to toxicity of the WWTP effluent or any pollutant
that is otherwise limited by the POTW discharge permit.The permit as modified or reissued under this paragraph
may also contain any other requirements of State or Federal pretreatment regulations then applicable.
28. Categorical Reopener
This permit shall be modified,or alternatively,revoked and reissued,to comply with any applicable effluent
standard or limitation issued or approved under Sections 302(b)(2)(C)and(D),304(b)(2),and 307(aX2)of the Clean
Water Act,if the effluent standard or limitation so issued or approved:
1)contains different conditions or is otherwise more stringent than any effluent limitation in this permit;or
2)controls any pollutant not limited in this permit.
The permit as modified or reissued under this paragraph shall also contain any other requirements of the Act then
applicable.
29. General Prohibitive Standards
The permittee shall comply with the general prohibitive discharge standards in 40 CFR 403.5(a)and(b)of the
Federal pretreatment regulations.
SIU CODE: HXA IUP No.0039
Page 13 of 17

PART II
General Conditions
30. Reports of Potential Problems
The permittee shall notify the Environmental Services Division immediately by telephone of all discharges that
could cause problems to the POTW, including any slug loadings as defined by 40 CFR 403.5 (b). The permittee
shall provide protection from accidental and slug discharges of prohibited materials and other substances regulated
by this permit.The permittee shall also notify the POTW which it's facility discharges to and Environmental
Services Division immediately of any changes at its facility affecting the potential for spills and other accidental
discharge,discharge of a non-routine,episodic nature,a non-customary batch discharge,or a slug load as defined in
the Sewer Use Ordinance. If the permittee experiences such a discharge,the permittee shall inform the
Environmental Services Division immediately upon the first awareness of the commencement of the discharge.
Notification shall include location of the discharge,type of waste,concentration,and volume-if known-and
corrective actions taken by the permittee.A written follow-up report thereof shall be filed by the permittee within
five(5)days,unless waived by the Environmental Services Division.
Additionally,the permittee in the event of the release of a slug discharge which may present a hazard to the public,
to municipal employees,or which may do harm to the collection system,treatment facilities or the treatment
process,the discharger must notify by telephone immediately the following persons or agencies until the accidental
spill has been reported:
o City of Salisbury Fire Department 704-638-5351
o Environmental Services Division,Pretreatment Department,704-638-5375,(8:00am-4:30pm)
o Water/Sewer Maintenance&Construction Division
(Emergencies affecting water or sewer service.)704-638-5339
o Grant Creek Treatment Train(24 hr.-7 days/wk)704-638-5374*
o Town Creek Treatment Train (24 hr.-7 days/wk)704-638-5377*
*Notify the municipal treatment train plant operator on duty at the facility into which you are
permitted to discharge.That information is available on the cover page of this permit.
Such notification will not relieve the permittee from any liability,which may be incurred as a result of the discharge,
but failure to notify shall be a violation of this permit and subject to enforcement action,including revocation or
termination of this permit.
SIU CODE: HXA IUP No.0039
Page 14 of 17

PART II
General Conditions
31. Signatory Requirements
All reports or information submitted to fulfill the requirements of this permit must be signed and certified by a
ranking and duly-authorized agent of the permittee.
The following certification statement must be included as an integral part of each report listed above under
"Signatory Requirements"and must be signed by the permittee's authorized agent:
"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 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.
(Signature) (Date)
(Title)
SIU CODE: HXA IUP No.0039
Page 15 of 17

PART III
Special Conditions
1. Spill/Slug Control Plan:
The permittee shall provide protection from accidental discharges of prohibited materials or other substances
regulated by this permit. The permittee is hereby notified that he shall develop,submit,obtain City approval
of,and implement a written Slug Control Plan within 90 days of the effective date of this permit.
Description of Measure,Activity,Plan,etc. Required Completion/Implementation Date
1. Implementation of current and updated Slug/Spill Continuous
Control Plan upon POTW approval
2. Review and update Slug/Spill Control Plan to assure Annual update(based on calendar year)
continuous effectiveness Submit to POTW for approval within 30 days of update
The plan submitted shall include the following measures as necessary to assure protection of the POTW from slug
loads: the construction of containment dikes around pretreatment units,around process units containing liquids,and
chemical storage areas;the rerouting of floor drains in manufacturing areas to a holding area located upstream of the
discharge to the pretreatment unit; and the plugging of floor drains in chemical storage areas, and in other areas as
needed to protect the POTW.
The permittee shall provide updates to the City as required by Part II, Section 30 of this permit. Modifications to the
measures shall be approved by the City prior to installation/ implementation. If a measure fails, Environmental
Services shall be notified within 24 hours.
2. Conditions Affecting WWTP Performance:
Should pollutants discharged by the permittee contribute to a degradation of the performance of the POTW,the City
may require the permittee to conduct a treatability study for the suspect pollutant(s). In addition,the City may
reopen and modify this permit as necessary to further regulate any pollutants causing such degradation of
performance.
3. Certified Laboratory Analysis
Pollutant analysis shall be performed by a North Carolina Division of Water Resources Certified Laboratory that is
certified in the analysis of the pollutant in wastewater.
SIU CODE: HXA IUP No.0039
Page 16 of 17

PART III
Special Conditions
4. Flow Measurement and Sampling Point Requirements:
a) The permittee shall maintain appropriate discharge flow measurement devices and methods consistent with
approved scientific practices to ensure the accuracy and reliability of measurements of the volume of monitored
discharges.Devices installed shall be continuous recording flow meter capable of measuring flows with a maximum
deviation of less than 10% from true discharge rates throughout the range of expected discharge volumes. The
totalizer shall be non-resettleable. The devices shall be installed, calibrated and maintained to ensure accuracy. The
meter shall be calibrated at a minimum of once every six months. Modifications to the flow metering equipment
shall be approved by the City prior to installation. If a required flow measurement device fails, Environmental
Services shall be notified within 24 hours.The permittee has 72 hours to return to compliance(and report total water
consumption in the interim).
b) The sampling point and any associated sampling equipment (including sampling tubing) shall be properly
maintained at all times.
c) Calibration and documentation of the pH meter is required for all wastewater needing pH adjustment. pH
must be compliant with effluent limits prior to discharge into City sewer. Record of the intial pH and the adjusted
pH shall be documented.
5. Total Toxic Organics(TTO)Definition:
"TTO", or Total Toxic Organics, is the sum of the concentrations of the toxic organic compounds listed in 40 CFR
433.11(e)that are found in the permittee's process at a concentration greater than 0.01 mg/L.
6. Total Toxic Organics(TTO)Certification:
In lieu of monitoring for TTO,the permittee may,upon submitting to the City one sample showing TTO compliance
and a toxic organic management plan,make the following certification every six months:
"Based upon my inquiry of the person or persons directly responsible for managing compliance with the permit
limitation for total toxic organics(TTO),I certify that,to the best of my knowledge,no dumping of concentrated
toxic organics into the wastewaters has occurred since filing of the last monitoring report.I further certify that
this facility is implementing the toxic organic management plan submitted to the City."
The certification statements are due by June 30 of each year covering the January through June six month
period,and December 7 of each year covering the July through December six month reporting period. If the
certification is not submitted for both periods within 7 days of the respective due dates,the City
shall collect TTO samples before December 31 and the permittee will be billed for the cost of the TTO
sampling and analysis.
7. Toxic Organic Management Plan:
Within ninety days of the issuance of this permit,the permittee shall develop and submit to the City a toxic organic
management plan.
SIU CODE: HXA IUP No.0039
Page 17 of 17

Sa/isktpliiwan
IUP SYNOPSIS
CITY OF SALISBURY- INDUSTRIAL PRETREATMENT PROGRAM
November 15,2021
A. IUP Basic Information
Name of City Facility: City of Salisbury WWTP POTW NPDES#: NC0023884
Name of Treatment: Town Creek
IUP Name: Hexagon Agility IUP Number: 0039
IUP Effective Date: January 1,2022 Pipe Numbers of 01
all regulated pipes:
IUP Expiration Date: December 31,2027 IUP 40 CFR N/A
Category,If
Applicable:
B. IU Survey/Application Form
Enclosed
C. IUP-Inspection Form:
A copy of the most recent inspection report is attached.
D. Rationale for Limitations
RATIONALE#1 -Review of IU Monitoring Data with no Over-Allocation:
The following pollutants were assigned numerical limits in this IUP based on a review of monitoring data for the
permittee to determine what range of concentrations are currently being discharged. Based on the City's 2017
headworks analysis currently on file with the NCDEQ/DWR/ PERCS Office, the following limits do not result in
over-allocation for any pollutant:
Insert Limit Page(As listed on the IUP Limits Page(s),Part 1,Specific Conditions Section F of the IUP).
SIU CODE: HXA PERMIT #0039
Page 1

EFFLUENT LIMITS TABLE I - Pipe #01
WWTP Treatment Train: Town Creek Treatment SIU Name: Hexagon Agility
POTW: Train
City of Salisbury
POTW NPDES #: NC0023884 Permit #: 0039
Effective Date: Januaryl,2022 Pipe #: #01
Expiration Date: December 31, 2027 40 CFR #: 433. 17
THE LIMITS IN THIS TABLE ARE: N/A DISCHARGE FLOW LIMITS
1) Limits for the Entire Permit Period. X Daily Maximum Monthly Avg.
2) Interim Limits for Period #1:
3) Interim Limits for Period #2: 35, 000 gpd
4) Final Limits
1. pH Limit - The pH of this discharge, identified by the pipe number indicated above, shall be within the range of 6.00 to
10.00 standard units at all times.
2. Temperature Limit - The temperature of the discharge, identified by the pipe number stated above, shall be less than
65.5 degrees C. at all times.
Limited Parameter Daily Industry POTW Sample Laboratory Detection
and Maximum Monitoring Monitoring Collection Level
Units Limit Frequency Frequency Method
Flow, MGD 0.035 *Daily 1/12 Discharge
flow meter
pH, s.u. (1) *Daily 1/12 Grab
Temperature, Celcius (2) *Daily 1/12 Grab
Cadmium, mg/L 0.07 2/6 1/12 Grab 0.50 ug/L
Chromium, mg/L 1.71 2/6 1/12 Grab 10.0 ug/L
Copper, mg/L 2.07 2/6 1/12 Grab 2.0 ug/L
Cyanide, mg/L 0.65 2/6 1/12 Grab 10.0 ug/L
Lead, mg/L 0.43 2/6 1/12 Grab 2.0 ug/L
Nickel, mg/L 2.38 2/6 1/12 Grab 5.0 ug/L
Silver, mg/L 0.24 2/6 1/12 Grab 1.0 ug/L
Zinc, mg/L 1.48 2/6 1/12 Grab 10.0 ug/L
Aluminum, mg/L Monitor 2/6 1/12 Grab 20.0 ug/L
TTO, mg/L*** 2.13 1/6 1/12 Grab
*Record flow meter reading daily. Monitor and record pH and Temperature each day
in which a wastewater discharge occurs.
***Refer to Part III, Special Conditions, 5-7.
There shall be no discharge of floating solids or visible foam in other than
trace amounts.
SIU CODE: HXA PERMIT #0039
Page 2

RATIONALE#2-Categorical Industrial Limits,with no Over-Allocation:
40 CFR Category 433.17 with the following limits-with no Over-Allocation:
Cadmium 0.07 mg/L;Chromium 1.71 mg/L;Copper 2.07 mg/L;Cyanide 0.65 mg/L;
Lead 0.43 mg/L;Nickel 2.38 mg/L;Silver 0.24 mg/L;Zinc 1.48 mg/L.
Total Toxic Organics(TTO's)assigned per 40 CFR 433.17 a total numerical limit of 2.13 mg/1—Hexagon
Agility has implemented and submitted the Toxic Organic Management Plan dated April 3,2017.In lieu of
sampling,Hexagon agility submits the Total Toxic Organics(TTO's)Certification Statement every six
months to the City of Salisbury Pretreatment Department.
RATIONALE#3a-Over Allocation Prevention,with IU Pollutant Reduction:
N/A
RATIONALE#3b-Interim Limits for IU Pollutant Reduction:
N/A
RATIONALE#4-Other Rationale for IUP Limits:
N/A
RATIONALE#5-No IUP Limit Needed or Assigned:
Aluminum-added as an IU monitored parameter due to the washing of some aluminum parts.
E.General Comments by POTW:
Renewal permit. Please note changes: Removed self-monitoring for Mercury on effluents Limits Table. Removed all
Mercury sampling requirement language from Part III Special Conditions 2. Totals Mercury. Added Aluminum as a
monitored parameter per a 2/6 self-monitoring frequency on the Effluent Limits Table.
SIU CODE: HXA PERMIT #0039
Page 3

EIVED
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SALISBURY-ROWAN UTILITIES
ENVIRONMENTAL SERVICES DIVISION
INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
The information provided on this questionnaire serves two functions:
1. To determine if your facility is in need of a Significant Industrial User(SIU) Industrial User Pretreatment
Permit (IUP)for the discharge of wastewater to the City of Salisbury's Publicly Owned Treatment Works
(POTW) sanitary sewer system.
2. If a SIU IUP is required,this survey shall serve as the application for that IUP and the information will be used
to issue the IUP.
PLEASE REFER TO THE GUIDANCE FOR COMPLETING THE INDUSTRIAL USER SURVEY/APPLICATION
INSTRUCTIONS, INCLUDED WITH THIS APPLICATION.
Submit this application along with a non-refundable application fee of$250.00 to:
Salisbury-Rowan Utilities
Environmental Services Division
1915 Grubb Ferry Road
Salisbury, N.C. 28144-1248
Attn.: Pretreatment Program Coordinator
Your permit application cannot be processed until all analytical results from a North Carolina certified laboratory are
submitted. A representative list of N.C. certified laboratories may be obtained from the Pretreatment Program
Coordinator if not supplied with this application.The applicant is responsible for verifying that the laboratory's North
Carolina certification is current before contracting for analytical work.
Unless instructed otherwise, each applicant must submit the results of the following effluent analyses:
BOD Nitrate+Nitrite Total Zinc
pH* Total Arsenic
Temperature* Total Cadmium
Total Phosphorus Total Chromium
Total Suspended Solids Total Copper
Total Kjeldahl Nitrogen Total Lead
Chemical Oxygen Demand Total Mercury
Cyanide Total Nickel
Ammonia Total Silver
Analyses indicated by"*" must be performed on grab samples. The remaining analyses listed above must be
performed on a 1 hr. x 24 hr. composite sample preserved according to EPA protocols. Analytical reports must be
accompanied by sample preservation and chain-of-custody documentation. Additional sampling and analysis may be
required, depending on the characteristics of the discharge,the nature of the process, and whether your facility's
discharge is subject to Federal Categorical Standards.

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
STATUS of APPLICANT/APPLICATION - PLEASE CHECK ONE
[ ] New Permit for Proposed Discharge
Anticipated Date of initial process wastewater discharge
[ ] Existing Unpermitted Discharge
[ X] Permit Renewal for Existing SIU Permit, existing non-SIU permit,or other written permission from POTW.
Note If this application requests a greater amount of wastewater discharge [flow], a greater amount of
pollutant discharge or a discharge of different pollutants than specified in the last wastewater permit
application for this facility,or any other significant changes, please indicate this as needed in the applicable
Questions,especially Questions A8 and E7.
Note to Signing Official: In accordance with Title 40 of the Code of Federal Regulations Part 403.14, information and
data provided in this questionnaire which identifies the content,volume, and frequency of discharge shall be available
to the public without restriction. Requests for confidential treatment of other Information shall be governed by
procedures specified in 40 CFR Part 2.
This is to be signed by the Authorized Representative of your firm, as defined in 40 CFR Part 403.12(I)and Section
25-1 of the Code of the City of Salisbury, after adequate completion of this form and review of the information by the
signing representative.
I, Lyndi Boone (print name), EHS Manager (print title),
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 submitted is,to the best of my knowledge
and belief, accurate and complete. I am an authorized representative of the user and am authorized to
execute this certification on behalf of the user. I am aware that there are significant penalties for submitting
false information in violation of this certification, including the possibility of fines and/or imprisonment.
I also certify that I have completed the necessary notification as required by the POTW to document my
qualification as an Authorized Representative as set forth in 40 CFR Part 403.12 (1) and Section 25-1 of the
Code of the City of Salisbury.
9/28/2021
Date nature of Representative
(Seal, if applicable)
IUP Application/Industrial Waste Survey 2012 Page 2 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION A—GENERAL INFORMATION
1. For the production or manufacturing facility for which this application is being completed:
Facility name Hexagon Agility
Physical address 1010 CORPORATE CENTER DR., SALISBURY, NC 28146
Mailing address (if different)
General Telephone Number 704-870-3526
General Fax Number
Website www.Hexagonagility.com
2. If applicable, general information about the corporate office, parent company, etc. [ ] N/A
Company name Hexagon Agility
Physical address 3335 Susan Street, Suite 100 Costa Mesa, CA 92626 USA
Mailing address(if different)
General Telephone Number 1 949 236 5520
General Fax Number 1 949 242 2842
Website www.Hexagonagility.com
3. Primary Authorized Representative authorized to represent this firm in official dealings with the Publicly
Owned Treatment Works(POTW).
Name Lyndi Boone
Title EHS Manager
Telephone/Cell/Fax [phone]
Email [e-mail]
Primary work _X_Facility Corporate Office Other—List address here:
location:
4. Alternate Authorized Contact for when the Primary Authorized Representative is not available.
Name Robert Hensley
Title Maintenance Engineer -
Telephone/Cell/Fax [phone]
Email [e-mail]
Primary work _X_Facility Corporate Office Other—List address here:
location:
5. On-Site Contact. If neither person identified in items 3 and 4 above are located at the production or
manufacturing facility for which this application is being completed provide an on-site contact person
available to answer questions regarding statements made on this survey as well as conduct a walkthrough
of the facility:
Name Al Jarrell
Title Maintenance Manager
Telephone/Cell/Fax [phone] _
Email [e-mail]
IUP Application/Industrial Waste Survey 2012 Page 3 of 25

ECEIVE
INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION A—GENERAL INFORMATION -continued
6. Identify the general type of manufacturing, production and/or service(s)conducted at the site (i.e.
electroplating, printing, painting,food processing, warehousing, meat packing,machine shop, etc.).
Greater detail to be provided in question A. 7.
Compressed natural gas fuel systems
7. Provide a detailed narrative description of the manufacturing/production process(es)and/or service activities
identified in question A. 6. and conducted at the facility identified in question A. 1.
Fabricate aluminum parts, paint, assemble parts, package and install compressed gas fuel systems for
commercial vehicles. Raw materials include: Aluminum and steel stock, stainless steel tubing, powder and
wet paint and parts washer chemicals
8. Are any process changes or expansions planned during the next five years? [X ]Yes [ ]No
If yes, describe the nature of the planned changes or expansions. As needed,clarify if answers to other
application questions are for before or after the change/expansion. If the facility has an existing permit,
indicate if these changes could or will result in the facility requesting changes to their existing permit.
Adding an additional building in back of property for tank manufacturing. No permit changes required.
9. List the Standard Industrial Classification Number(s) (SIC#)or North American Industry Classification
System (NAICS) codes for your facility. If listing more than one code, indicate the percentage of production.
SIC/NAICS code: _ 3714/336312
Percentage of production 100
10. In what month and year were the facility's operation(s)at this location(as specified in A. 7.above)
established and under what name?
Facility Name Month Year
AGILITY FUEL SYSTEMS, INC June 2015
11. Has your facility undergone any changes in licensed ownership since the date noted in question A. 10?
[ X ]Yes [ ] No If yes,complete table.
Facility Name Month Year
Hexagon Agility January 2021
IUP Application/Industrial Waste Survey 2012 Page 4 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
Section B— Flow Diagram/Schematics, Site Layout, and Pretreatment System Flow Diagram
[See the Guidance Document for Completing the Industrial User Wastewater Survey and Discharge Permit
Application included with this application.
PRODUCTION/PROCESS SCHEMATIC FLOW DIAGRAM (REQUIRED)
(see attached
IUP Application/Industrial Waste Survey 2012 Page 5 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
Section B—Flow Diagram/Schematics, Site Layout, and Pretreatment System Flow Diagram
[See the Guidance Document for Completing the Industrial User Wastewater Survey and Discharge Permit
Application included with this application.
PLANT SITE LAYOUT(REQUIRED)
(see attached)
IUP Application/Industrial Waste Survey 2012 Page 6 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
Section B—Flow Diagram/Schematics, Site Layout, and Pretreatment System Flow Diagram
[See the Guidance Document for Completing the Industrial User Wastewater Survey and Discharge Permit
Application included with this application.
WASTEWATER PRETREATMENT SYSTEM FLOW DIAGRAM (IF APPLICABLE)
IUP Application/Industrial Waste Survey 2012 Page 7 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION C-FACILITY OPERATION CHARACTERISTICS
Office/Administrative Staff
Monday Tuesday Wednesday _ Thursday Friday Saturday Sunday
#Employees 70 70 70 _ 70 70
Start/End Time 7am-3.30pm 7am-3.30pm 7am-3.30pm 7am-3.30pm 7am-3.30pm 7am-3.30pm 7am-3.30pm
Production Staff
Monday Tuesday Wednes Thursday Friday Saturday Sunday
day
1st Shift # 169 169 169 169 169
Employees
Start Time 6 am 6 am 6 am 6 am 6 am 6 am 6 am
End Time 2.30pm 2.30pm 2.30pm 2.30pm 2.30pm 2.30pm 2.30pm
2nd Shift # 20 20 20 20 20
Employees
Start Time 2.00pm 2.00pm 2.00pm 2.00pm 2.00pm 2.00pm 2.00pm
End Time 10.30pm 10.30pm 10.30pm 10.30pm 10.30pm 10.30pm 10.30pm
3rd Shift # 19 19 19 19 19
Employees
Start Time 10.00pm 10.00pm 10.00pm 10.00pm 10.00pm 10.00pm 10.00pm
EndTime 6:30 am 6:30 am 6:30 am 6:30 am 6:30 am 6:30 am 6:30 am
Shift Activities
SHIFT DESCRIPTION OF SHIFT ACTIVITIES
Monday 1st Fabricate aluminum parts, paint, assemble parts, package and install compressed
gas fuel systems for commercial vehicles.
2nd Fabricate aluminum parts, paint, assemble parts, packaged compressed gas fuel
systems for commercial vehicles.
3rd Fabricate aluminum parts and paint.
Tuesday 1st Fabricate aluminum parts, paint, assemble parts, package and install compressed
gas fuel systems for commercial vehicles.
2nd Fabricate aluminum parts, paint, assemble parts, packaged compressed gas fuel
systems for commercial vehicles.
3rd Fabricate aluminum parts and paint.
Wednesday 1st Fabricate aluminum parts, paint, assemble parts, package and install compressed
gas fuel systems for commercial vehicles.
2nd Fabricate aluminum parts, paint, assemble parts, packaged compressed gas fuel
systems for commercial vehicles.
3rd Fabricate aluminum parts and paint.
Thursday 1st Fabricate aluminum parts, paint, assemble parts, package and install compressed
gas fuel systems for commercial vehicles.
2nd Fabricate aluminum parts, paint, assemble parts, packaged compressed gas fuel
systems for commercial vehicles.
3rd Fabricate aluminum parts and paint.
Friday 1st Fabricate aluminum parts, paint, assemble parts, package and install compressed
gas fuel systems for commercial vehicles.
2nd Fabricate aluminum parts, paint, assemble parts, packaged compressed gas fuel
systems for commercial vehicles.
3rd Fabricate aluminum parts and paint.
Saturday 1st Fabricate aluminum parts.
2nd Fabricate aluminum parts.
3rd Fabricate aluminum parts.
Sunday 1st Fabricate aluminum parts.
2nd Fabricate aluminum parts.
3rd Fabricate aluminum parts.
IUP Application/Industrial Waste Survey 2012 Page 8 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
IUP Application/Industrial Waste Survey 2012 Page 9 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION D—PROCESS INFORMATION
NOTE: The following information must be completed for each product line. Please make copies of this page if
necessary.
Information revealed in this section may be held confidential and proprietary under 40 CFR 403.14 at the request of
the Industrial User and the approval of the POTW. The request for confidentiality must be made at the time of
the initial submission of the application. Should such a request be made and accepted in compliance with
Section 25-207 of the Code of the City of Salisbury these page(s)will be removed before review by any non-
regulatory personnel.
1. Principal product(s) produced:
Compressed natural gas fuel systems
2. Raw materials and process additives used:
Aluminum and steel stock, stainless steel tubing, dry powder and wet paint and parts washing chemicals
3. Maximum and average production rate of this particular product line(please specify units being reported):
Average Production Rate Maximum Production Rate Units
32 systems/day 40 systems/day systems/day
4. The production process is [ X] Batch [ ] Continuous
If batch, please enter the average number of batches per 24 hours. [ 1 ]
If both, please enter%or production
[ %] Batch [ %]Continuous
5. Days and hours of operation for this product line: From: 6:00 am to 6:00 am
6. Days and Hours of discharge for this product line: From: 6:00 am to 6:00 am
7. Is production subject to seasonal variation? [ ] Yes [x ] No
If yes, briefly describe the seasonal production cycles:
IUP Application/Industrial Waste Survey 2012 Page 10 of 25

RECEIVE `
INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION E—WATER USE AND WASTEWATER DISCHARGE INFORMATION
1. Please indicate source(s) of water used at your facility:
Source Type Check One If yes,...
Well [ ] Yes [X ] How many are there?
No
How many are in use at this time?
City [X ] Yes [ ] List all Account numbers:
No 91211509309181
Surface Water [ ]Yes [ X ] Identify the source:
No
Other [X ] Yes [ ] Explain: RO water made from
No the city water.
2. Does this facility provide any treatment to the incoming water to improve the water quality prior to its use in
the facility, (i.e. deionization, reverse osmosis, ultra filtration, pH adjustment, etc.)?[ ]Yes [X ] No
Note: I answered the above question in relation to the incoming water for the"whole"facility.We do have a
RO system that has a pre-filter,carbon filter, and water softener for the washer.
If yes,complete table.
Treatment Process Chemicals Used Wastewater Generated and Volume(gpd)
Carbon Adsorption + Softener Carbon + Salt 3 gpm (6:00 am to 6:00 am)
for RO water
3. This facility uses water for the following:
(Please record"n/a"if the application/use does not apply to the operations at your facility.)
Detailed Description of Maximum Average [E]stimated
Type of Application/Use Applicable Operation(s) Volume Volume or
and/or Equipment Used Used [M]easured
(gallons/day) (gallons/day)
Process Paint wash 25,000 22,000 [X ] E [ J M
Water Into Product 0 0 [X ) E [ ]M
Process Related Facility/Equipment N/A N/A N/A [ ] E [ ] M
Washdown"
Process Contact Cooling or Warming N/A N/A N/A [ ] E [ ] M
Water
Process Related Air-Pollution Control N/A N/A N/A [ ] E [ 1 M
Unit
Process Related Employee Showers N/A N/A N/A [ ] E [ J M
Lab N/A N/A N/A [ ] E [ ] M
Maintenance Shop N/A N/A N/A [ ]E [ ]M
Boilers(Please specify if live and/or dry 1 live boiler for humidity to 200 150 [X ] E [ ]M
steam is used.) spray in the paint booth
1 dry boiler to heat
chemicals and paint booths
Backwash Water Carbon Column and 250 200 [X ] E [ ]M
softener
Pump Sealant Water N/A N/A N/A [ ] E [ ] M
General Facility/Equipment Washdown* Facility floor scrubber 50 20 [X J E [ ]M
Other non-contact water uses: boilers; 1-Chiller and HVAC 200 200 [X ] E [ ]M
non-contact cooling/warming water,
general air conditioning, cooling towers,
chillers, HVAC, etc.
Domestic(e.g. restroom(s), non-process Bathrooms and Cafeteria 3,000 3,000 [X ] E [ ]M
related employee showers, cafeteria,
kitchen, breakroom etc.)
Other, please describe N/A N/A N/A [ ] E [ ]M
Total 28,700 25,570
"Please document clean up schedules in Shift activities in Section C.
IUP Application/Industrial Waste Survey 2012 Page 11 of 25

RECEOVE
(i-S-u ,
INDUSTRIAL USER WASTEWATGi SURVEY AND DISCHARGE PLRMIT APPLICATION
SECTION E—WATER USE AND WASTEWATER DISCHARGE INFORMATION (continued)
4. The facility oner.,tes wastewatc:r from the following areas and that v.Ylior is discharged where
If the source of wastewater discharged does not exist at your facility record"n/a". If there is no discharge from the
applicable source, record 'no discharge"
Wastewater is
Source of Wastewater Discharged Pretreated? Volume Estimated (E) or
To Where Discharged Measured (M)
(gallons/day)
.�I�:.Inaiv-I��w.�-n1 F�GT;,' x es no 22,000 x E M
a. Process _.._-- L._l�_-- _[. l._ _. [ 1 [ ]
b. Water Into Product P1'!. [ ) yes f x ) no 0 [ x )E [ ] M
.
c. Process Related N'A [ j yes [ X J 0 HIE I ] M
Facility/Equipment no
Washdown'
d.Process Contact Cooling ] yes [x ] no U [ x ]E [ I M
or Warming Water
e.Process Related Air- I I.: [ ] yes [ x ) no 0 [ x I E [ ] M
Pollution Control Unit
f. Process Related N/A [ ] yes [ x ] no 0 [ x I E [ I M
Employee Showers
cd,Lab Nrl1 [ ] yes [ x ] no 0 [ x ] E [ 1 M
h Maintenance Shop N/A [ ] yes [ x ) no 0 [ x ]E [ ] M
i. Backwash Water ,4 iir,t wy-1. nv+ n POP:: [ x ] yes [ ] no 200 [ x ]E [ ] M
j. Pump Sealant Water j ]_yes [x ] no [ x ]E [ ] M
k.General III I wy.I'r r:;ui POW./ [ x ] yes [ ) no 20 [ x ]E [ ] M
Facility/Equipment
Washdown`
I. Other non-contact water r'OTA1 [ x ] yes [ ) no 200 [ x ]E [ ] M
uses: boilers;non-contact
cooling/warming water,
general air conditioning,
cooling towers,chillers,
HVAC,etc.
m. Domestic(e.g. S.lIi'.l,ury-Row; n POT0.1 [ ] yes [ x ) no 3,000 [ x I E [ l M
restroom(s), non-process
related employee
showers, cafeteria,
kitchen,breakroom etc) _
n.Groundwater/Remediated I•J,i [ l yes [ x ] no 0 [x ]E [ I M
Groundwater
o.Storm Water Runoff I:'A. _ [ l yes [ x ] no 0 [x ]E [ ] M
p.Tank Bottoms NI, [ 1 yes [ x ] no 0 [ x ]E [ ] M
q.Other, please specify [ ] yes [x ] no [ x ]E [ ) M
r Total Discharged to 25.420
POTW
'Please document clean up schedules in Shift activities in Section C.
5. Identity the daily maximum flow limit requested. Please explain any differences between the requested flow
limit and actual flows listed in E.4.
Requested.Daily Maximum Flow Limit,gpd:
Requested Monthly Average Flow LimitLgpd: NO CHANGE REQUESTED
Explanation:
IUP Application/lndustri:il Waste Survey 2012 Page 12 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION F—CHEMICALS, POLLUTANTS, WASTES
1. Complete Checklist for Priority, Conventional, Non-Conventional,and Other Pollutants.
All chemicals require that TWO columns are checked
Chemical
Abstract Present in Absent in Concentration
Number Present Absent Discharge to Discharge to in Discharge,
Chemical Name [CAS#] at Facility at Facility POTW POTW (mg/I)
Acid Extractable Organic Compounds(EPA Method 625)
2-Chlorophenol 95-57-8 X X
2,4-Dichlorophenol 120-83-2 X X
2,4-Dimethylphenol 105-67-9 X X
2,4-Dinitrophenol 51-28-5 X X
2-Methyl-4,6-dinitrophenol 534-52-1 X X
4-Chloro-3-methylphenol 59-50-7 X X
2-Nitrophenol 88-75-5 X X
4-Nitrophenol 100-02-7 X X
Pentachlorophenol 87-86-5 X X
Phenol _ 108-95-2 X X
2,4,6-Trichlorophenol 88-06-2 X X
Base Neutral Organic Compounds (EPA Method 625)
1,2,4-Trichlorobenzene 120-82-1 X X
1,2-Dichlorobenzene 95-50-1 X X
1,2-Diphenylhydrazine 122-66-7 X X
1,3-Dichlorobenzene 541-73-1 X X
1,4-Dichlorobenzene 106-46-7 X X
2,4-Dinitrotoluene 121-14-2 X X
2,6-Dinitrotoluene 606-20-2 X X
2-Chloronaphthalene 9• 1-58-7 X X
3,3-Dichlorobenzidine 91-94-1 X X
4-Bromophenyl phenyl ether 101-55-3 X X
4-Chlorophenyl phenyl ether 7005-72-3 X X
Acenaphthene 8• 3-32-9 X X
Acenaphthylene 208-96-8 X X
Anthracene 120-12-7 X X
Benzidine 92-87-5 X X
Benzo (a) anthracene 5• 6-55-3 X X
Benzo(a) pyrene 50-32-8 X X
Benzo(b) fluoranthene 205-99-2 X X
Benzo(ghi) perylene 191-24-2 X X
Benzo(k)fluoranthene 207-08-9 X X
Bis(2-chloroethoxy) methane 111-91-1 X X
Bis (2-chloroethyl) ether 111-44-4 X X
Bis(2-chloroisopropyl) ether 102-60-1 X X
Bis(2-ethylhexyl) phthalate 117-81-7 X X
[DEHP]
Butyl benzyl phthalate[BBP] 85-68-7 X X
Chrysene 218-01-9 X X
Di-n-butyl phthalate[DBP] 84-74-2 X X
Di-n-octyl phthalate [DOP] 117-84-0 X X
IUP Application/Industrial Waste Survey 2012 Page 13 of 25

rp CCC OWED
Ili-5�zc J6 J
INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION F—CHEMICALS, POLLUTANTS,WASTES (continued)
All chemicals requlre that TWO columns are checked
Chemical
Abstract Present in Absent in Concentration
Number Present Absent Discharge to Discharge to in Discharge,
Chemical Name [CAS#] at Facility at Facility POTW POTW (mg/I)
Base Neutral Organic Compounds (continued)
Dibenzo(a,h)anthracene 53-70-3 X X
Diethyl phthalate[DEP] 84-66-2 X X
Dimethyl phthalate[DMP] 131-11-3 X X
Fluoranthene 206-44-0 X X
Fluorene 86-73-7 X X
Hexachiorobenzene 118-74-1 X X
Hexachlorobutadiene 87-68-3 X X
Hexachlorocyclopentadiene 77-47-4 X X
Hexachioroethane 67-72-1 X X
Indeno(1,2,3-cd)pyrene 193-39-5 X X
Isophorone 78-59-1 X X
N-nitroso-di-n-propylamine 621-64-7 X X
N-nitrosodimethylamine 62-75-9 X X
N-nitrosodiphenylamine 86-30-6 X X
Naphthalene 91-20-3 X X
Nitrobenzene 98-95-3 X X
Phenanthrene 85-01-8 X X
Pyrene 129-00-0 X X
Metals
Aluminum X X
Antimony 7440-36-0 X X
Arsenic 7440-38-2 X X
Beryllium 7440-41-7 X X
Cadmium 7440-43-9 X X
Chromium 7440-47-3 'X X
Copper 7440-50-8 X X
Lead 7439-92-1 X X
Mercury 7439-97-6 X X
Molybdenum 7439-98-7 X X
Nickel 7440-02-0 X X
Selenium 7782-49-2 X X
Silver 7440-22-4 X X
Thallium 7440-28-0 X X
Zinc 7440-66-6 X X
Other Inorganic Pollutants
Barium 7440-39-3 X X
Chloride X X
Cyanide 57-12-5 X X
Fluoride X X
IUP Application/Industrial Waste Survey 2012 Page 14 of 25

RecituvLir-
11-c zi jG-
INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION F—SECTION F— CHEMICALS, POLLUTANTS, WASTES (continued)
All chemicals require that TWO columns are checked
Chemical
Abstract Present in Absent in Concentration
Number Present Absent Discharge to Discharge to in Discharge,
Chemical Name [CAS#] at Facility at Facility POTW POTW (mg/I)
Purgeable Volatile Organic Compounds(VOCs](EPA Method 624)
1,1,1-Trichlcroethane 71-55-6 X X
1,1,2,2-Tetrachloroethane 79-34-5 X X
1,1,2-Trichloroethane 79-00-5 X X
1,1-Dichloroethane 75-34-3 X X
1,1-Dichloroethylene 75-35-4 X X
1,2-Dichloroethane 107-06-2 X X
1,2-Dichloropropane 78-87-5 X X
2-Chloroethyl vinyl ether 110-75-8 X X
Acrolein 107-02-8 X X
Acrylonitrile 107-13-1 X X
Benzene 71-43-2 X X
Bromodichloromethane 75-27-4 X X
Bromoform 75-25-2 X X
Bromomethane 74-83-9 X X
Carbon tetrachloride 56-23-5 X X
Chtorobenzene 108-90-7 X X
Chloroethane 75-00-3 X X
Chloroform 67-66-3 X X
Chloromethane 74-87-3 X X
Cis 1,3-Dichloropropene X X
Dlbromochloromethane 594-18-3 X X
Ethylbenzene 100-41-4 X J SC
Methylene chloride 75-09-2 X X
Tetrachloroethylene 127-18-4 X X
Toluene 108-88-3 X X
Trans 1,3-Dichloropropene X X
Trans-1,2-Dichloroethylene 156-60-5 X X
Trichloroethylene 79-01-6 X X
Trichlorolluoromethane X X
Vinyl chloride 75-01-4 X X
Other Pollutants of Concern
Xylene X ' X
BOD X X
TSS X X
Ammonia X X
Total Phosphorus X X
Total Nitrogen X X
Oil& Grease X X
range of Ph
IUP Application/Industrial Waste Survey 2012 Page 15 of 26

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION F—CHEMICALS, POLLUTANTS,WASTES (continued)
2. If any wastewater analyses have been performed on the wastewater discharge(s)from your facilities, please
attach to this survey a copy of the lab report,chain of custodies and location of where the samples were
taken for the most recent sampling date. Do not attach analyses performed by the POTW or analytical
data already delivered to the POTW.
3. Does your facility complete a Toxic Release Inventory?[ ]Yes [ X ]No
If yes,most recent copy attached OR POTW already has
4. Please list boiler and cooling tower treatment additives or MSD sheets and dosage rates for each.
Type of Boiler or Treatment Additive Name Purpose of Additive Dosage,with units
Cooling Unit
Hot water heater Chemetall Enprox 815 Scale dispersant, 1.25 gallons of product/
(molybdate) corrosion inhibitor 1000 gallons of closed
loop water(75 PPM
Chemetall MC 68 WT Biocide molybdate)
32 oz of product/1000
gallons of closed loop
water(3.84 PPM active
ingredient)
Steam boiler Chemetall Enprox BWT 27 Scale dispersant 2-10 PPM active
kphosphate,sulfite ingredient
Chiller Chemetall Enprox 815 Scale dispersant, 1.25 gallons of product/
(molybdate) corrosion inhibitor 1000 gallons of closed
loop water(75 PPM
Chemetall MC 68 WT Biocide molybdate)
32 oz of product/1000
Ethylene Glycol anti-freeze gallons of closed loop
water(3.84 PPM active
ingredient)
12%by volume
5. Do you have any storage tank(s)at your facility? [X ]Yes [ ] No If yes, complete the chart below.
Associated with
o v o 3 v [P]rocess;
jg > c a [W]astewater
in ?, 2 �°'' E Volume treatment; Spill
E Q m (in [G]roundwater Containment
Tank ID gallons_) Contents remediation; Devices
Tank la(Wet Paint) I A 1200 Gardo Clean S 5176 P FLOOR DRAIN TO
Heated 120°F Gardo Bond H7406 A PIT
Tank lb(Powder I A 1200 Gardo Clean S 5176 P FLOOR DRAIN TO
Paint) Gardo Bond H7406 A PIT
Heated 120°F
Tank 2 I A 1900 City water+RO P FLOOR DRAIN TO
Overflow A PIT
Tank 3 I A 1900 RO Water P FLOOR DRAIN TO
A PIT
Tank 4 I A 1750 Oxsilan 9810-2 P FLOOR DRAIN TO
Oxsilan Additive A PIT
9906
Tank 5 I A 1900 RO Water P FLOOR DRAIN TO
A PIT
Tank 6 I A 2000 RO Water P FLOOR DRAIN TO
A PIT
Tank 7 I A 1800 Process Water W FLOOR DRAIN TO
A PIT
Tank 8 I A 100 Process Water W FLOOR DRAIN TO
A PIT
Tank 9 0 A Oxygen N/A
Tank 10 0 A Liquid Nitrogen N/A
IUP Application/Industrial Waste Survey 2012 Page 16 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
6. Are any liquid wastes or sludges(i.e.acids,alkalies, heavy metal sludges, inks,dyes,oil,grease,organic
compounds,paints, pesticides, plating wastes,pretreatment sludges, solvents,thinners,waste product,etc.)
from this firm disposed of by means other than discharge to the sewer system? [x]Yes [ ]No
If yes ,please complete the followin5:
Nature of Waste hauler's Treatment Facility's Disposal facility's Est.Gallons or
hauled name, Name,EPA ID#and Name, EPA ID#and Pounds per
Waste and date EPA ID#and address Address Year hauled off
Last hauled address _
Paint Related SLE DART Charlotte,NC 12,000 lbs/annually
Waste(0001, NCR000163832 NCD121700777
F003) Greensboro,NC 4132 Pompano Road
Charlotte,NC 28216
Non-Haz Debris SLE SLE 75000 lbs/annually
NCR000163832 NCR000163832
Greensboro,NC Greensboro,NC
7. Is this facility a small quantity,large quantity,or conditionally exempt Hazardous Waste Generator?
[ X ] Small Quantity [ ] Large Quantity [ ] Conditionally Exempt [ ] Not Applicable
Facility's EPA Hazardous Waste Generator ID#: NCR000166793
Waste Codes: F003, D001
IUP Application/Industrial Waste Survey 2012 Page 17 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION G—WASTEWATER TREATMENT, FLOW, AND SAMPLING EQUIPMENT
1. Is the wastewater generated by this facility treated prior to discharge to the POTW? [X ]Yes [ ] No
If yes, please complete the chart below. If a particular pretreatment unit only treats part of the wastewater,
indicate this below and in the diagram required by Section B.
Pretreatment Unit [Y]es[N]o Additional Information Chemicals Used
Activated Carbon N
Air Stripping N
Biological Treatment N Activated Sludge
Rotating Biological Contactor(RBC)
Trickling Filter
Sequencing Batch Reactor(SBR)
Other
Chemical Precipitation N
Chlorination,for N
disinfection
Cyanide Destruction N
Defoaming Agents N
Dissolved Air Floatation N list all individual units of DAF here
(DAF) equalization
pH adjustment
chemical precipitation
Other
Flow equalization,aerated N Size(gallons)
Before After Pretreatment
Flow equalization, N Size(gallons)
not aerated Before After Pretreatment
Grease and Oil Removal N Grease Trap, Size
for employee cafeteria, Oil Water Separator
kitchen, breakroom, etc. Other
Grease and Oil Removal N Grease Trap, Size
for food manufacturing Oil Water Separator
process wastewater Other _
Grease and Oil Removal N Grease Trap, Size
for non-food Oil Water Separator
manufacturing process Other
wastewater
Heat N
Reclamation/Exchange _
Ion Exchange(for N
wastewater treatment)
Neutralization, pH Y
adjustment
Ozonation N
Reverse Osmosis(for N
wastewater treatment)
Septic Tank N
Silver Recovery N
Solids Separation, N Belt Press Centrifugation
Clarification, Dewatering, Clarification Cyclone
Removal, etc. Filter Press Filtration
Flocculation Grit Removal
Microfiltration
Nanofiltration Screening
Sedimentation Septic Tank
Ultrafiltration
Other
Solvent Separation N
Spill protection Y
IUP Application/Industrial Waste Survey 2012 Page 18 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION G —WASTEWATER TREATMENT, FLOW, AND SAMPLING EQUIPMENT (continued)
2. Describe wastewater flow measuring methods and/or equipment. If applicable, list the meter's current
interval,flow volume, pulse frequency and reporting units:
Current meter:
The discharge flow meter at the Hexagon Agility facility is a Rosemount full pipe Mag Meter
for 1-1/2" pipe, model 8750WDMT1A1FPSB015CA1M4G1Q4,serial number 14680403,which
was installed 6/28/2017.
Flow:Typical is 20 gpm. Current flow volume: 13283667 gallons as of 9/27/2021.
Meter reports in gallons.
Pulse Frequency: 1 per every 10 seconds.
3. Listprocedures employed to ensure the accuracyof flow measurement method/equipment.
Frequency of Cleaning:
Calibration method: 3rd party vendor(Clearwater, Inc.)compares the output
to that of Clearwater's transit time flexim flow meter
which was temporarily installed on the same discharge
line.
Calibration performed by: Clearwater, Inc.
Training/credentials of calibration Company located in Hickory, NC
staff:
Date of most recent calibration: 6/22/2021
Copy of Calibration Certificate POTW already has_X_ OR Copy attached
4. Describe the sampling method and associated equipment utilized at the facility. Identify staff or contract lab
responsible for sampling. Describe sampling technician training.
Sampling Equipment/Method: GRAB SAMPLE
Sampling staff: Robert Hensley/Lyndi Boone
Training/credentials of sampling staff: Maintenance Engineer/EHS
IUP Application/Industrial Waste Survey 2012 Page 19 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION H —CATEGORICAL STATUS
1. Check any products listed below that are manufactured or activities that are performed at this facility:
[ 140 CFR 467 Aluminum Forming [ ]40 CFR 432 Meat Products
[ )40 CFR 427 Asbestos Manufacturing [X)40 CFR 433 Metal Finishing
[ ]40 CFR 461 Battery Manufacturing [ ]40 CFR 464 Metal Molding& Casting
[ ]40 CFR 431 Builders Paper& Board Mills [ )40 CFR 436 Mineral Mining & Processing
[ ]40 CFR 407 Canned & Preserved Fruits&Veg. [ )40 CFR 471 Nonferrous Metal, Form & Powders
[ ]40 CFR 408 Canned &Preserved Seafood [ 140 CFR 421 Nonferrous Metals Manufacturing
[ ]40 CFR 458 Carbon Black Manufacturing [ 140 CFR 414 OCPSF
[ ]40 CFR 411 Cement Manufacturing [ 140 CFR 435 Oil & Gas Extraction
[ 140 CFR 437 Centralized Waste Treatment [ ]40 CFR 440 Ore Mining & Dressing
[ )40 CFR 434 Coal Mining [ ]40 CFR 446 Paint Formulating
[ ]40 CFR 465 Coil Coating [ ]40 CFR 443 Paving & Roofing Materials Mfg.
[ )40 CFR 468 Copper Forming [ ]40 CFR 455 Pesticide Manufacturing
[ 140 CFR 405 Dairy Products Processing [ ]40 CFR 419 Petroleum Refining
[ 140 CFR 469 Electrical, Electronics Components [ )40 CFR 439 Pharmaceutical Manufacturing
[ )40 CFR 413 Electroplating [ )40 CFR 422 Phosphate Manufacturing
[ )40 CFR 457 Explosives Manufacturing [ )40 CFR 459 Photographic Supplies
[ )40 CFR 412 Feedlots [ ]40 CFR 463 Plastics Molding & Forming
[ ]40 CFR 424 Ferroalloy Manufacturing [ )40 CFR 466 Porcelain Enameling
[ 140 CFR 418 Fertilizer Manufacturing [ ]40 CFR 430 Pulp, Paper, & Paperboard
[ ]40 CFR 464 Foundries, Metal Mold & Casting [ )40 CFR 428 Rubber Manufacturing
[ ]40 CFR 426 Glass Manufacturing [ )40 CFR 417 Soap& Detergent Manufacturing
[ )40 CFR 406 Grain Mills [ )40 CFR 423 Steam Electric Power Generation
[ ]40 CFR 454 Gum &Wood Chemical Manufacturing
[ )40 CFR 460 Hospitals [ ]40 CFR 409 Sugar Processing
[ ]40 CFR 447 Ink Formulating [ ]40 CFR 410 Textile Mills
[ )40 CFR 415 Inorganic Chemical Manufacturing [ 140 CFR 429 Timber Products Processing
[ )40 CFR 420 Iron& Steel Manufacturing [ )40 CFR 442 Transportation Equipment Cleaning
[ ]40 CFR 425 Leather Tanning & Finishing [ ] OTHER
If any are checked, continue with Questions 2 and 3 of this Section
Otherwise, check here and skip to next Section.
IUP Application/Industrial Waste Survey 2012 Page 20 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION H - CATEGORICAL STATUS -continued
2. Is there a discharge from any of the above checked categorical operations to the POTW? [X]Yes [ ] No
If Yes, complete table.
Process operation name 40 CFR, subpart, 40 CFR New Date initial Date(s) major
operations, etc Source Date process start-up change*
Aluminum sheets milling 40 CFR 433 June 2015 June 2015
and chemical etching
Date(s) of commencement of construction of any major upgrades, updates, refits, or reinstallations of the
operation since the start-up date.
From the above, is this facility a [ ] New Source [X ] Existing Source [ ] Unknown
3. Are there any"dilution"wastestreams that flow through the current/proposed monitoring point?
Yes [ ] No [ X ]
If Yes, ensure these wastestreams are clearly identified as such in question E,4.
IUP Application/Industrial Waste Survey 2012 Page 21 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION I—SLUG/SPILL PREVENTION and WASTE MINIMIZATION
1. Enter employees responsible for notifying the POTW in the event of a spill, bypass, pretreatment facility
upset, or other unusual discharge or problem and employees authorized to close down production if needed,
along with information about training and procedures.
If information is formalized in a Plan of some kind, list Plan Number and page#.
Notification of POTW Plan Name, Authority to close Plan Name,
page# down production page#
Designated Lyndi Boone Spill/Slug Steve Engstrom
Employee(s) Control Plan Antonio Wilkie
A Jarrell
Training of those Yearly Spill/Slug Lyndi Boone
employees Control Plan
Procedures Call POTW ASAP Spill/Slug Lyndi Boone
Control Plan
How other staff know Training Spill/Slug Lyndi Boone
when and how to Control Plan
contact designated
individuals?
2. Does the facility have measures, equipment, and/or plans to protect the POTW and/or sanitary sewer in the
event of accidental spills, slugs, or other inappropriate discharges)? [X ] Yes [ ] No
If yes, complete table.
For measures that are formalized in a Plan of some kind (e.g., Spill Prevention Control and Countermeasure
Plan, Spill/Slug Control Plan,Toxic Organic Management Plan), list Plan Number and page#.
Note: the POTW may request copies of the identified plans.
Measures to protect POTW and/or sanitary sewer Plan Name and page#s, if applicable
Spill/Slug Control plan update 2021 See attached Slug/Accidental Discharge
Control OI a n
3. Does your company have a pollution prevention/waste minimization/recycling/reuse program established,or
have had a pollution prevention or other waste minimization audit conducted? [ ] Yes [ X ] No
If yes, complete Table.
Name of Plan/Audit Most recent copy POTW already has copy
attached
IUP Application/Industrial Waste Survey 2012 Page 22 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
4. Please check"current", "projected"or"N/A"for all codes below relating to your facility's wastewater
discharge.
N/A Current Projected Code Description
[ ] [ X ] [ ] W13 Improved maintenance scheduling, record keeping, or procedures
[X ] [ ] [ ] W14 Changed production schedule to minimize equipment and feedstock changeovers
[X I [ ] [ ] W19 Other changes in operating practices (please explain)
[ ] [X ] [ ] W21 Instituted procedures to insure that materials do not stay in inventory beyond shelf life
[X ] [ ] [ ] W22 Began to test outdated material—continue to use if still effective
[X ] [ ] [ ] W23 Eliminated shelf-life requirements for stable materials
[X ] [ I [ ] W24 Instituted better labeling procedures
[X ] [ I [ ] W25 Instituted clearinghouse to exchange materials that would otherwise be discarded
[X ] [ ] [ ] W29 Other changes in inventory control (please explain)
[ I [X ] [ I W31 Improved storage or stacking procedures
[ ] [ ] [X ] W32 Improved procedures for loading, unloading and transfer operations
[ I [ ] [X ] W33 Installed overflow alarms, and/or automatic shutoff valves
[ ] [X ] [ ] W34 Installed secondary containment
[ X] [ ] [ ] W35 Installed vapor recovery systems
[ I [ ] [X ] W36 Implemented inspections or monitoring program of potential spill or leak sources
[ X] [ ] [ ] W39 Other spill and leak prevention (please explain)
[X ] [ ] [ I W41 Increased purity of raw materials
[X ] [ ] [ I W42 Substituted raw materials
[ X] [ ] [ ] W49 Other raw materials modifications (please explain)
[ ] [X ] [ ] W51 Instituted recirculation within a process
[X ] [ ] [ ] W52 Modified equipment, layout, and/or piping
[X ] [ ] [ I W53 Use of different process catalyst
[X ] [ ] [ ] W54 Instituted better controls on operating bulk containers to minimize discarding of empty
containers
[ X] [ ] [ ] W55 Change from small volume containers to bulk containers to minimize discarding of
empty containers
II
IUP Application/Industrial Waste Survey 2012 Page 23 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
N/A Current Projected Code Description
[X ] [ ] [ ] W58 Other process modifications(please explain)
[X ] [ ] [ ] W59 Modified stripping/cleaning equipment
[X ] [ ] [ I W60 Changed to mechanical stripping/cleaning devices (from solvents or other materials)
[X ] [ ] [ ] W61 Changed to aqueous cleaners(from solvents or other materials)
[X ] [ ] [ ] W62 Reduced the number of solvents used to make waste more amendable to recycling
[X ] [ ] [ ] W63 Modified containment procedures for cleaning units
[ ] [X ] [ ] W64 Improved draining procedures
[ ] [X ] [ ] W66 Modified or installed rinse systems
[ ] [X ] [ ] W67 Improved rinse equipment design
[ ] [X ] [ ] W68 Improved rinse equipment operation
[X ] [ ] [ ] W71 Other cleaning and degreasing operation(please explain)
[ ] [X ] [ ] W72 Modified spray systems or equipment
[X ] [ ] [ ] W73 Substituted coating materials used
[X ] [ ] [ ] W74 Improved application techniques
[X l [ ] [ I W75 Changed from spray to other system
[X ] [ ] [ I W78 Other surface preparation and finishing(please explain)
[X ] [ ] [ ] W81 Changed product specifications
[X ] [ ] [ l W82 Modified design or composition of product
[X ] [ ] [ ] W83 Modified packaging
[X ] [ ] [ ] W89 Other product modifications(please explain)
[X ] [ ] [ ] W99 Other(please explain)
IUP Application/Industrial Waste Survey 2012 Page 24 of 25

INDUSTRIAL USER WASTEWATER SURVEY AND DISCHARGE PERMIT APPLICATION
SECTION J — OTHER PERMITS
1. List all environmental control permits currently managed for or by this facility. Examples: air, National
Pollutant Discharge Elimination System (NPDES), Industrial User Permits (IUP), Resources Conservation
and Recovery Act (RCRA), groundwater, storm water, general, non-discharge, and septic tank. Be prepared
to provide the POTW with copies of identified permits and related records.
Permit Type Permit Number Issuing Agency
Air Permit 10484R00 NC DEQ
Haz Waste Permit NCR000166793 NC DEQ
Stormwater Permit NCG030669 NC DEQ
2. With regard to the parent company and all subsidiaries, list all wastewater discharge permits issued to cover
similar operations to those at this facility. Examples: National Pollutant Discharge Elimination System
(NPDES), Industrial User Permits (IUP), groundwater, general, non-discharge, and septic tank. Be prepared
to provide the POTW with copies of identified permits and related records.
Facility and Permit Type Permit Number Issuing Agency
Location
3. With regard to the parent company and all subsidiaries, list all environmental permits applied for in the
United States where issuance was denied OR the permit was terminated prior to the expiration date.
Examples: air, NPDES, IUP, RCRA, groundwater storm water, general, non-discharge, and septic tank. Be
prepared to provide the POTW with copies of identified permits and related records.
Reason for
Permit Type Issuing Agency Date Facility Name Denial/Termination
and Location
IUP Application/Industrial Waste Survey 2012 Page 25 of 25

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INDUSTRIAL PRETREATMENT INSPECTION FORM
Name of Industry: Hexagon Agility IUP# 0039
Address of Industry: 1010 Corporate Drive IUP Expiration Date: 12/31/2021
Salisbury,N.C. 28146
Industry Representatives: Title
Lyndi Boone ENS Manager
Robert Hensley Maintenance Engineer
POTW Representatives: Title
Jeff Greer Pretreatment Program Coordinator
Johnny Rogers FOG Program Coordinator
Date of Inspection: October 20,2021 Time of Inspection: 10:00 am
Purpose of Inspection: Annual Other(Describe): N/A
POTW to which IU discharges: Town Creek WWTP NPDES#: NC0023884
Is SIU currently in SNC? NO If yes,for what?
PART I-INITIAL INTERVIEW
Has anything changed since the last inspection or IUP application in thefollowing:
Product:No change-Compressed natural gas fuel systems for commercial vehicles.IU has also acquired a business that
converts gasoline engines to propane engines.
Raw Materials Used:No change-Aluminum and steel sheet stock,stainless steel tubing,powder&liquid paint,and parts
washer chemicals.
Manufacturing processes:No change-Manufacture,paint,assemble,package,ship and install commercial compressed natural
gas fuel systems.
Categorical,if applicable:40 CFR 433.17
Production Rate: Yes change-Facility has had an increase in production rate since last inspection from approximately 30
systems/day to an average of 33 systems/day.Production rate for Behind the Cab units increased 100 units per week for the
months of August and September 2021
#Employees: 169 Full Time; 169 Contracted #Shifts: 3("A", "B", & "C"shift)
#Days/Week: "A"Shift-5 days/week-Monday-Friday 6 am-2:30 pm; "B"Shift-5 days/week-Monday-Friday 2:00 pm-10:30
pm. "C"Shift-5 nights/week-Sunday-Thursday 10 pm-6:30 am.
PART II-PLANT TOUR-Visit all areas where wastewater is generated or where there are drains to the POTW.
Plant Tour Section A-PRODUCTION AND STORAGE AREAS
1.Are there floor drains in the production arm? YES(One floor drain)
Where do they go?The process wastewater goes to a series of 5 tanks located in a pit. The pit also serves as secondary
containment in the event of a tank leak
2.Are production areas diked,contained,or otherwise constructed in such a way as to prevent harm to the WWTP,
especially from spills or slugs? YES
3.Are there floor drains in the storage area? NO
4.Are storage tanks and areas diked,contained,or otherwise constructed in such a way as to prevent harm to the WWTP,
especially from spills or slugs? YES
Page 1

5.Are process and storage tanks and pipes labeled?
Com ments:Process tanks were labeled(including chemicals used).Pipes are currently in the process of being labeled.
6.How are off-spec raw materials,and products disposed of?
Paint related waste and non-hazardous debris is hauled off by Southern Logistics and Environmental(SLE)located in
Greensboro,NC.SLE also transports hazardous waste to DART, located in Charlotte,NC which properly disposes hazardous
material using a treatment method of fuel blending.Solid waste is brokered out to different landfills through SLE.
7.When is the production area cleaned? Daily
8.Is the wastewater from cleaning the production area discharged to the POTW? YES
Wastewater from cleaning the production area(and a mop water collection tank)are collected, then processed through
facility pretreatment unit.
9.What non-process wastewaters are discharged to POTW?
Domestic, backwash wastewater from RO carbon filter and water softener,general facility/equipment wash down,and floor
scrubber wastewater,and other non-contact wastewater-i.e. boiler blowdown(2 boilers-one used for steam and the other
used for hot water heaters),cooling/warming water,air conditioning,recirculating cooling water, chiller,and a large volume
of HVAC condensate.
PART II-Plant Tour Section B-PRETREATMENT SYSTEM
Ask the operator to describe pretreatment system.
1.Does operator seem knowledgeable about the system? YES
Comments:Pretreatment of discharge wastewater was noted in following description:Steam boiler blowdown and rinse
overflow of 5-stage parts washer(Stage#1:caustic wash using chemicals Gardo Clean S5176 and Gardo Bond H7406 which
are soap based;Stage#2:Reverse Osmosis+City water rinse; Stage#3:Reverse Osmosis water rinse; Stage#4:Acid wash
using chemicals Oxislan 9810 and Oxsilan Additive 9906;Stage#5:Reverse Osmosis water rinse)is accomplished by using a
final pH adjustment tank equipped with a Walchem controller and pH sensor. Caustic or acid is metered, by pumps,to adjust pH
as needed.Facility has set a pH range control of 6.5 s.u. to 8.5 s.u.
2.Are all units operational? YES
3.How often does operator/maintenance person check system? Daily
On an hourly basis, Tank levels,chemical drum levels,and pH correction tank and equipment is monitored
4.Is there an operator for each shift? YES
A,B,and C shifts has an operator---Night shift("C")began in May 2021
5.How and when is sludge disposed of?
Once per year and on as needed basis, bag filter and sludge waste from Pretreatment unit Tank#4 is pumped out and
delivered out of Rowan County by Southern Logistics and Environmental(SLE)located in Greensboro,NC.SLE then
consolidates the waste in one of their holding tanks,then it is shipped to a variety of facilities based on those
facilities schedules.Note:SLE does not use any treatment facilities located in Rowan County.
6.Is there schedule for preventative maintenance? YES
Comments:Preventative maintenance is performed monthly on wastewater tanks. Also during this time pH probe calibration
is performed,air pumps and diverter valve are checked for proper operation.All PM s are documented and tracked using an
on-site electronic computer database.
PART II-Plant Tour Section C-SAMPLING POINT(S)AND FLOW MEASUREMENT
(Collect a sample if desired.)
1.Does an outside lab complete samping? NO If yes,name of lab.
Sampling completed by facility personnel Robert Hensley/Lyndi Boone.Pace Analytical is contract lab.
2.If industry completes sampling,ask the industry representative to describe sampling procedures.
Facility personnel take grab samples from sampling point in pre preserved bottles provided by contract lab.
Page 2

3.Is flow measurement equipment operational? YES
Flow Meter reading: 13601769
4.Is there a calibration log for the flow meter? YES
Clearwater, Inc. calibrates flow meter every 6 months between January-June and July-December.
PART HI-EXIT INTERVIEW
Review monitoring records and other SIU records required by IUP.
1.Are files well organized? YES
2.Are sample collection/chain-of-custody forms filled out properly? YES
3.Do results in files agree with reports sent to POTW? YES
4.Who has authority to shut down production should a spill or slug discharge occur?
Al Jarrell-Facility and Maintenance Manager;Antonio Wilkie-Paint Manager;Steve Engstrom-Director of Operations;
Bob Hensley-Maintenance Engineer;Lyndi Boone-Director of Health and Safety
5.How does SIU inform employees of whom to call at POTW in case of spill/slug?
IU utilizes a computer on-line training system by HSI(Health and Safety Institute)to conduct this training annually.
6.Slug/Spill Control Plan Required? YES
Last update submitted: September 2,2021(Revision dated May2021)
7.Is SIU implementing slug/spill plan? YES
Review procedures. IU implements spill kits consisting of proper PPE,absorbent pads/socks, barrier tape, broom,
disposable bags/ties and drain covers.
INSPECTION RESULTS
Comments,Required or Recommended Actions:
• Currently IU calibrates in-line pH meter monthly using standard buffers of 7 and 10.IUwill begin using
additional buffer of 4 to bracket pH calibrationin the near future and they maintain a calibration log on-site.
• Next updated slug/spill plan due May 2022.
• Current IU permit#0039 expires 12/31/2021.IU Permit renewal application has been submitted and is currently
in the review process by the City Pretreatment Department.
• PT informed IU that the required TTOCertification Statement is due December 7,2021
• Facility housekeeping and organization was well maintained
• Pretreatment files were extremely well organized and readily available upon inspection.Mr.Robert Hensley and
Ms.Lyndi Boone was very knowledgeable of all aspects of Hexagon's pretreatment system and also very
courteous.
Signature of Inspector(s): Date:
Date:
Page 3

,
Workbook Name : Draft--Town Creek HWA AT 2018_Approved., Worksheet Name: AInted: 11/8/2021, 1:32 PM
• — Page 1 of 4
Allocation Table Spreadsheet Instructions:
Headworks last approved: 02/22/18 1)Applicable Values should be entered in the Heavy Bordered cells. Rest of worksheet is protected,password is"2".
2)Formulas are discussed in the Comprehensive Guidance,Chapter 6,Section C.
Allocation Table updated: 11/15/21 3)HWA and AT worksheets in this workbook are linked. Pollutant Names,MAHLs,Basis,and Uncontrollable load in
Permits last modified: 04/15/21 this AT worksheet are automatically entered from the HWA spreadsheet. This includes pollutant names in columns AT
through BK.
POTW=>Town Creek WWTT
NPDESA=>NC0023884
FLOW BOD TSS
Industry Type Renewal Modification Date Permit Limits Permit Limits Permit Limits
IUP INDUSTRY NAMES Permit Pipe of Effective Effective Permit Conc. Load Conc. Load
Count (please liar alphabe6cb) number number Industry Date Date Expires MGD gal/day m /1 lbs/da m 1 lbs/da
1 Hexagon Agility 0039 01 _ 3714-433 01/01/22 12/31/27 0.0350 35,000
2 HBD,Inc. 0011 01 3069 07/15/16 11/13/20 06/30/21 0.0300 30,000
3 Thorneburg Hosiery Mills,Inc. 0034 01 2252 11/01/21 10/31/26 _ 0.1000 100,000 250.00 250.00
4
5
6
7
8
9 _
10
Column Totals=> 0.1650 165,000 I 250 250
Basis=> NPDES Design Design
MAHL from HWA(lbs/day)=> NPDES Permitted Flow=> 5.0000 14595 16680
Uncontrollable Loading(lbs/day)=> 2.1603 4504 5009
Total Allowable for Industry(MAIL)(lbs/day)=> 2.8397 10090.8 11671
Total Permitted to Industry(lbs/day)=> 0.1650 250 250
MAIL left(lbs/day)_> 2.6747 9841 11421
Percent Allow.Ind.(MAIL)still available(%)=> 94.2% 97.5% 97.9%
Percent MAHL still available(%)_> 53.5% 67.4% 68.5%
5 Percent MAHL(lbs/day)_> 0.2500 730 834:
HWA.AT
Revised:November 2005

•
Workbook Name : Draft--Town Creek HWA AT 2018_Approved., Worksheet Name: �rnted: 11/8/2021, 1:32 PM
- Page 2 of 4
Allocation Table
Headworks last approved: 02/22/18
Allocation Table updated: 11/15/21
Permits last modified: 04/15/21
POTW=>Town Creek WWTT
NPDES1k>NC0023884
Ammonia Arsenic Cadmium Chromium Copper Cyanide
Industry Permit Limits Permit Limits Permit Limits Permit Limits Permit Limits Permit Limits
IUP INDUSTRY NAMES Permit Pipe Conc. Load Conc. Load Conc. Load Conc. Load Conc. Load Conc. Load
Count (please list alphebetcly) number number mg/I lbs/day mg/1 lbs/day mg/I lbs/day mg/1 lbs/day mg/1 lbs/day mg/1 lbs/day
1 Hexagon Agility 0039 01 0.0700 0.0204 1.7100 0.4991 2.0700 0.6042, 0.6500 0.1897
2 HBD,Inc. 0011 01 0.0300
3 Thorneburg Hosiery Mills,Inc. 0034 01 ~-. 0.0510
4
5 _
6
7
8
9
r
10
Column Totals=> 0 0.0000 0.0204 0.49911 0.6852 0.1897
AS/Nit/TF AS/NitTTF Stream AS/Nit/TF AS/Nit/TF AS/Nit/TF
Basis=> inhibition inhibition Std inhibition inhibition inhibition
MAHL from HWA(lbs/day)_> 8859.08 1.8456 1.3971 7.2718 8.8591 1.8456
Uncontrollable Loading(lbs/day)=> 450.42 0.0775 0.0541 0.9008 1.0990 0.7387
Total Allowable for Industry(MAIL)(lbs/day)=> 8408.66 1.7682 1.3430 6.3710 7.7601 1.1069
Total Permitted to Industry(lbs/day)_> 0.00 0.0000 0.0204 0.4991 0.6852 0.1897
MAIL left(lbs/day)_> 8408.66 1.7682 1.3226 5.8719 7.0749 0.9172
Percent Allow.Ind.(MAIL)still available(%)_> 100.0% 100.0% 98.5% 92.2% 91.2% 82.9%
Percent MAHL still available(%)_> 94.9% 95.8% 94.7% 80.7% 79.9% 49.7%
5 Percent MAHL(lbs/day)_> 442.95 0.0923 0.0699 0.3636 0.4430 0.0923
HWA.AT
Revised:November 2005

Workbook Name : Draft--Town Creek HWA AT 2018_Approved., Worksheet Name: tented: 11/8/2021, 1:32 PM
Page 3 of 4
Allocation Table
Headworks last approved: 02/22/18
Allocation Table updated: 11/15/21
Permits last modified: 04/15/21
Pores”Town Creek WWTT
NPDES > NC0023884
Lead Mercury ' Molybdenum Nickel Selenium Silver
Industry Permit Limits Permit Limits Permit Limits Permit Limits Permit Limits Permit Limits
IUP INDUSTRY NAMES Permit Pipe Conc. Load Conc. Load Conc. Load Conc. Load Conc. Load Conc. Load
Count (please listalphabcticl)) number number mg/1 lbs/day mg/1 lbs/day mg/1 lbs/day mg/1 lbs/day mg/1 lbs/day mg/1 lbs/day
1 Hexagon Agility 0039 01 0.4300 0.1255 2.3800 0.6947 0.2400 0.0701
2 HBD,Inc. 0011 01
3 Thorneburg Hosiery Mills,Inc. 0034 01
4
5
6 _
7 *
8
9
10
Column Totals=> 0.1255 0.0000001 0.0000 0.69471 0.0000 t 0.0701
Stream Sludge AS/Nit/TF Sludge Stream
Basis=> Std Stream Std Ceiling inhibition Ceiling Std
MARL from HWA(lbs/day)_> 6.1077 0.023052 4.3853 4.6141 3.8591 0.1844
Uncontrollable Loading(lbs/day)_> 0.8828 0.005405 0.0901 0.3784 0.0775 0.0901
Total Allowable for Industry(MAIL)(lbs/day)=> 5.2249 0.017647 4.2952 4.2358 3.7816 0.0943
Total Permitted to Industry(lbs/day)_> 0.1255 0.000000 0.0000 0.6947 0.0000 0.0701
MAIL left(lbs/day)_> 5.0994 0.017647 4.2952 3.5411 3.7816 0.0242
Percent Allow.Ind.(MAIL)still available(%)=> 97.6% 100.0% 100.0% 83.6% 100.0% 25.7%
Percent MAHL still available(%)=> 83.5% 76.6% 97.9% 76.7% 98.0% 13.1 %
5 Percent MAHL(lbs/day)_> 0.3054 0.001153 0.2193 0.2307 0.1930 0.0092
HWA.AT
Revised:November 2005

Workbook Name : Draft--Town Creek HWA AT 2018_Approved., Worksheet Name: Alrnted: 11/8/2021, 1:32 PM
— Page 4 of 4
Allocation Table
Headworks last approved: 02/22/18
Allocation Table updated: 11/15/21
Permits last modified: 04/15/21
POTW=>Town Creek WWTT
NPDES >NC0023884
Zinc Total Nitrogen Total Phos.
Industry Permit Limits Permit Limits Permit Limits
IUP INDUSTRY NAMES Permit Pipe Conc. Load Conc. Load Conc. Load
Count (please lie(alphabe0ch) number J number mg/1 lbs/day mg/1 lbs/day mg/I lbs/day
1 Hexagon Agility 0039 01 1.4800 0.4320
2 HBD,Inc. 0011 01 0.0750
3 Thorneburg Hosiery Mills,Inc. 0034 01 0.1460
4
5
6
7
8
9
10
Column Totals=> 0.6530 0.00 0.00
AS/Nit TF
Basis=> inhibition _
MAHL from HWA(lbs/day)=> 18.4564
Uncontrollable Loading(lbs/day)_> 3.1530 653.6352 96.93
Total Allowable for Industry(MAIL)(lbs/day)_> 15.3035
Total Permitted to Industry(Ibs/day)_> 0.6530 0.00 0.00
MAIL left(lbs/day)_> 14.6505
Percent Allow.Ind.(MAIL)still available(%)_> 95.7% ####### #######
Percent MAHL still available(%)_> 79.4% ####### #######
5 Percent MAHL(lbs/day)=> 0.9228
HWA.AT
Revised:November 2005