NCS000346_Renewal application_20230612

�����'_;;-�tomlwater Program
EPA Identification Number NPDES Permit Number Fadlf Name Form Approved 03105/19
NCS000346 In-steel Wire Products OMB No.2040-0004
Form U.S.Environmental Protection Agency
1 \.EPA Application for NPDES Permit to Discharge Wastewater
NPDES GENERAL INFORMATION
SECTIONeNPDES
1.1 Applicants Not Required to Submit Form 1
Is the facility a new or existing publicly owned Is the facility a new or existing treatment works
1.1.1 treatment works? 1.1.2 treating domestic sewage?
If yes, STOP.Do NOT complete No If yes,STOP.Do NOT No
Form 1.Complete Form 2A. complete Form 1. Complete
Form 2S.
1.2 Applicants Required to Submit Form 1
1.2.1 Is the facility a concentrated animal feeding 1.2.2 Is the facility an existing manufacturing,
E operation or a concentrated aquatic animal commercial, mining,or silvicultural facility that is
a- production facility? currently discharging process wastewater?
A ❑ Yes 4 Complete Form 1 No Yes 4 Complete Form Fz] No
z and Form 28. 1 and Form 2C.
- 1.2.3 Is the facility a new manufacturing,commercial, 1.2.4 Is the facility a new or existing manufacturing,
mining,or silvicultural facility that has not yet commercial,mining,or silvicultural facility that
commenced to discharge? discharges only nonprocess wastewater?
(] Yes 4 Complete Form 1 0 No ❑ Yes 4 Complete Form No
and Form 2D. 1 and Form 2E.
1.2.5 Is the facility a new or existing facility whose
'— discharge is composed entirely of stormwater
a associated with industrial activity or whose
discharge is composed of both stormwater and
non-stormwater?
0 Yes 4 Complete Form 1 No
and Form 2F
unless exempted by
40 CFR
122.26(b)(14)(x)or
b 15 .
rN 2.NAME,MAILING ADDRESS,AND LOCATIONr
2.1 Facility Name
Insteel Wire Products
0 2.2 EPA Identification Number
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2.3 Facility Contact
N
n Name(first and last) FTille Phone number
a Greg Brown f Manufacturing [phone]
Email address
- [e-mail]
2.4 Facility Mailing Address
E
Street or P.O. box
z
1510 Carter Street
City or town State ZIP code
Mount Airy NC 27030
EPA Form 3510-1(revised 3-19) Page 1

EPA ldentificat on Number NODES Permit Number Facility Name Form Approved 03105/19
NC5000346 insteel Wire Products OMB No.2040-0OQ4
UT
� 2.5 Facility Location
a . Street,route number,or other specific identifier
�0 1510 Carter Street
rn
o County name County code(if known)
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Surry
E _j City or town State ZIP code
z Mount Airy NC 27030
SECTION // i
3.1 SIC Code(s) Description(optional)
3315
(n
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3.2 NAICS Code(s) Description(optional)
m 331222
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4.1 Name of Operator
Insteel Wire Products
0 4.2 Is the name you listed in Item 4.1 also the owner?
E ❑ Yes ❑ No
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4-
4.3 Operator Status
❑ Public—federal ❑ Public—state ❑ Other public(specify)
o ❑✓ Private ❑ Other(specify)
4.4 Phone Number of Operator
[phone]
4.5 Operator Address
o Street or P.O. Box
CU
E 1570 Carter Street
•� City or town State ZIP code
o �o Mount Airy NC 27030
Q Email address of operator
O [e-mail]
SECTION1 1 4
a -a 5.1 Is the facility located on Indian Land?
J ❑ Yes ❑✓ No
EPA Form 3510-1(revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03105/19
NCS000346 Insteel Wire Products OMB No.2040-0004
SECTION -! I
b 6.1 Existing Environmental Permits(check all that apply and print or type the corresponding permit number for each)
❑ NPDES(discharges to surface ❑ RCRA(hazardous wastes) ❑ UIC(underground injection of
o water) fluids)
- NCS000346
C Q a, ElPSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CAA)
X ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section 404) ❑ Other(specify)
ua
SECTIONI
7.1 Have you attached a topographic map containing all required information to this application?(See instructions for
CL
specific requirements.)
❑ Yes ❑ No ❑ CAFO—Not Applicable(See requirements in Form 2B.)
SECTIONOF 1
8.1 Describe the nature of your business.
IWP produces steel wire mesh used in concrete reinforcing by drawing steel rod into desired wire diameters and
welding the wire together through a pressure resistance welding process.
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CA
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COOLINGSECTION 9. 1
9.1 Does your facility use cooling water?
v
❑✓ Yes ❑ No 4 SKIP to Item 10A.
9.2 Identify the source of cooling water,(Note that facilities that use a cooling water intake structure as described at
40 CFR 125,Subparts I and J may have additional application requirements at 40 CFR 122.21(r).Consult with your
NPDES permitting authority to determine what specific information needs to be submitted and when.)
C,
UCity water with sewer connection-if discharged goes to city sewer
G
SECTION
1 VARIANCE REQUESTSI I
10.1 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(m)?(Check all that
apply,Consult with your NPDES permitting authority to determine what information needs to be submitted and
v when.)
❑ Fundamentally different factors(CWA ❑ Water quality related effluent limitations(CWA Section
Section 301(n)) 302(b)(2))
❑ Non-conventional pollutants(CWA ❑ Thermal discharges(CWA Section 316(a))
ZE Section 301(c)and(g))
❑✓ Not applicable
EPA Form 3510-1(revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05119
NC5000346 Insteel Wire Products OMB No.2040-0004
SECTION 11.CHECKLIST AND 1
11.1 In Column 1 below,mark the sections of Form 1 that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note
that not all applicants are required to provide attachments.
Column 1 Column 2
❑✓ Section 1:Activities Requiring an NPDES Permit ❑ wl attachments
❑✓ Section 2:Name,Mailing Address,and Location ❑ wl attachments
0 Section 1 SIC Codes ❑ wl attachments
✓❑ Section 4:Operator Information ❑ wi attachments
❑✓ Section 5: Indian Land ❑ wi attachments
Section 6: Existing Environmental Permits ❑ wl attachments
wl fopographic
:° ❑ Section 7:Map ❑ ma ❑ wl additional attachments
❑✓ Section 8:Nature of Business ❑ wl attachments
© Section 9:Cooling Water Intake Structures ❑ wl attachments
�' ❑✓ Section 10:Variance Requests ❑ wl attachments
C
y 0 Section 11:Checklist and Certification Statement ❑ wl attachments
a 11.2 Certification Statement
U
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the
information submitted.Based on my inquiry of the person or persons who manage the system,or those persons
directly responsible for gathering the information,the information submitted is,to the best of my knowledge and
belief,true,accurate,and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of tine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Greg Brown Director of Manufacturing
Signature Date signed
EPA Form 3510-1(revised 3-19) Page 4

SECTION C: LOCATION MAP
Permit No.NCS000346
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Insteel Wire
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Latitude:36°28`31"N NCS000346 Facility
Longitude: 80°36'30"W
County: Surry Insteel Wire Products Location
Stream Class: C
Receiving Stream,:Lovills Creek
Sub-basin:03-07-03(Yadkin Pee-Dee River Basin) I
[�OttR Not to Scale
Part I Page 2 of 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCS000346 Insteel Wire Products OMB No.2040-0004
Form U.S Environmental Protection Agency
2F \""'.EPA Application for NPDES Permit to Discharge Wastewater
NPDES STORMWATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY
SECTIONOUTFALL LOCATIONi
1.1 Provide information on each of the facilit 's outfails in the table below
Outfall Receiving Water Name Latitude Longitude
Number
001 Lovill's Creek/Ararat River 8p 3d 26.3 N 31; 28' 31.0" W
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0
.2 002 Lovill's Creek/Ararat River g� 4 51.3 NEl
36, 28' 36.5" W L]
0
003 Lovill's Creek/Ararat River 86 36� 32.5" N FZ] 36° 28 351' W
p 004 Lovill's Creek/Ararat River 8CP 3d 32.2" N 36� 28 36.�' W
005 Lovill's Creek/Ararat River 86 3d 43.5' N 36- 29 34.1' W
SECTION • I
2.1 Are you presently required by any federal,state,or local authority to meet an implementation schedule for constructing,
upgrading,or operating wastewater treatment equipment or practices or any other environmental programs that could
affect the discharges described in this application?
❑ Yes 0 No 3 SKIP to Section 3.
2.2 Briefly identify each applicable pro}ect in the table below.
Brief Identification and Affected Outfalls Source(s)of Discharge Final Compliance Dates
Description of Project (list outfall numbers)
Required Projected
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2.3 Have you attached sheets describing any additional water pollution control programs(or other environmental projects
that may affect your discharges)that you now have underway or planned?(Optional Item)
❑ Yes ❑ No
EPA Form 3510-2F(Revised 3-19) Page 1

EPA Identification Number NPnES Permit Number Facility Name Form Approved 03/05/19
NCS000346 Insteel Wire Products OMB No.204NO04
SECTIONE^ I
W 3.1 Have you attached a site drainage map containing all required information to this application?(See instructions for
a: ,� specific guidance.)
U)
® Yes ❑ No
POLLUTANTSECTION 4. • 1
4.1 Provide information on the facility's pollutant sources in the table below.
Outfall Impervious Surface Area Total Surface Area Drained
Number (within a mile radius of the facility) (within a mile radius of the facility)
specify units specify units
001 1.60 acres 2.18 acres
specify units specify units
002 0.00 acres 1.61 acres
specify units specify units
003 1.93 acres 4.88 acres
specify units specify units
004 0.00 acres 3.97 acres
specify units specify units
005 0.00 acres 0.75 acres
specify units specify units
4.2 Provide a narrative description of the facility's significant material in the space below.(See instructions for content
requirements.)
Coils of Rod and Finished Goods
Diesel Aboveground Storage Tank
� Kerosene Aboveground Storage Tank
cn Scrap Wire/End Trim Containers
Garbage Container
0
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4.3 Provide the location and a description of existing structural and non-structural control measures to reduce pollutants in
stormwater runoff. See instructions forspecificguidance.)
Stormwater Treatment
Codes
Outfall from
Number Control Measures and Treatment Exhibit
2F-1
list
001 Absorbent socks,Bales of hay 1-U,1-X
002 Absorbent socks,Bales of hay 1-U,1-X
003 Absorbent socks,Bales of hay 1-1j,1-X
004 Absorbent socks 1-X
005 Absorbent socks 1-X
EPA Form 3510-2F(Revised 3.19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NCS000346 Insteel Wire Products OMB No,2040-0004
SECTION •N STORMWATER I
5.1 1 certify under penalty of law that the outfall(s) covered by this application have been tested or evaluated for the
presence of non-stormwater discharges. Moreover, I certify that the outfalis identified as having non-stormwater
discharges are described in either an accompanying NPDES Form 2C, 2D,or 2E application.
Name(print or type first and last name) Official title
Greg Brown Director of Manufacturing
Signatur Date signed
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a+ 5.2 Provide the testing information requested in the table below.
Outfall Onsite Drainage Points
N Description of Testing Method Used Date(s)of Testing Directly Observed
C1 Number
During Test
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001 Visual Inspection OS/11/2023 No flow
0
in
c 002 Visual Inspection 5/11/2023 No flow
0
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003 Visual Inspection 5/11/2023 No flow
004 Visual Inspection 5/11/2023 No flow
005 Visual Inspection 5/11/2023 No flow
SECTIONOR I
6.1 Describe any significant leaks or spills of toxic or hazardous pollutants in the last three years.
None
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SECTION •' • I
See the instructions to determine the pollutants and parameters you are required to monitor and, in turn,the tables you must
`0 com lete-Not all applicants need to complete each table.
5 7.1 Is this a new source or new discharge?
o ❑ Yes 4 See instructions regarding submission of ❑ No 4 See instructions regarding submission of
v
estimated data, actual data.
Tables A,B,C,and D
R
7.2 Rave you completed Table A for each outfali?
❑r Yes ❑ No
EPA Form 3510-2F(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05119
NCS000346 7insteel Wire Products OMB No.2040-0004
7.3 Is the facility subject to an effluent limitation guideline(ELG)or effluent limitations in an NPDES permit for its process
wastewater?
❑ Yes ❑✓ No 4 SKIP to Item 75
7.4 Have you completed Table B by providing quantitative data for those pollutants that are(1)limited either directly or
indirectly in an ELG and/or(2)subject to effluent limitations in an NPDES permit for the facility's process wastewater?
❑ Yes ❑ No
7.5 Do you know or have reason to believe any pollutants in Exhibit 2F-2 are present in the discharge?
0 Yes ❑ No 4 SKIP to Item 7.7.
7.6 Have you listed all pollutants in Exhibit 2F-2 that you know or have reason to believe are present in the discharge and
provided quantitative data or an explanation for those pollutants in Table C?
❑✓ Yes ❑ No
7.7 Do you qualify for a small business exemption under the criteria specified in the Instructions?
❑ Yes 4SKIP to Item 7.18. © No
7.8 Do you know or have reason to believe any pollutants in Exhibit 2F-3 are present in the discharge?
❑✓ Yes ❑ No 4 SKIP to Item 7.10.
v 7.9 Have you listed all pollutants in Exhibit 2F-3 that you know or have reason to believe are present in the discharge in
Table C?
0 0 Yes ❑ No
0 7,10 Do you expect any of the pollutants in Exhibit 2F-3 to be discharged in concentrations of 10 ppb or greater?
❑✓ Yes ❑ No 4 SKIP to Item 7.12.
0
7,11 Have you provided quantitative data in Table C for those pollutants in Exhibit 2F-3 that you expect to be discharged in
L, concentrations of 10 ppb or greater?
0 Yes ❑ No
7.12 Do you expect acroiein,acrylonitrile,2,4-dinitrophenol,or 2-methyl-4,6-dinitrophenol to be discharged in concentrations
of 100 ppb or greater?
❑ Yes 0 No 4 SKIP to Item 7.14.
7.13 Have you provided quantitative data in Table C for the pollutants identified in Item 7.12 that you expect to be
discharged in concentrations of 1 DO ppb or greater?
❑ Yes ❑ No
7.14 Have you provided quantitative data or an explanation in Table C for pollutants you expect to be present in the
discharge at concentrations less than 10 ppb(or less than 100 ppb for the pollutants identified in Item 7.12)?
© Yes ❑ No
7.15 Do you know or have reason to believe any pollutants in Exhibit 2F-4 are present in the discharge?
❑ Yes ❑✓ No 4 SKIP to Item 7.17.
7.16 Have you listed pollutants in Exhibit 2F-4 that you know or believe to be present in the discharge and provided an
explanation in Table C?
❑ Yes ❑ No
7.17 Have you provided information for the storm event(s)sampled in Table D?
© Yes ❑ No
EPA Form 3510-2F(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 031051€9
NC5000346 Insteel Wire Products OMEI No.2040-0004
Used or Manufactured Toxics
7.18 Is any pollutant listed on Exhibits 2F-2 through 2F-4 a substance or a component of a substance used or
manufactured as an intermediate or final product or byproduct?
0
❑✓ Yes El No SKIP to Section$.
0
ca E
7A9 List the pollutants below, including TCDD if app1cable.
0
1.Aluminum 4,Zinc 7.
m
ca 2.Iron 5. 8.
AD
o 8•Lead 6. 9.
SECTION • •GICAL TOXICITY TESTING DATA
8.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on
2 any of your discharges or on a receiving water in relation to your discharge within the last three years?
a
w
❑ Yes ❑ No 4 SKIP to Section 9,
8.2 Identify the tests and their purposes below.
Test(s) Purpose of Test(s) Submitted to NPDES Date Submitted
x Permitting Authority?
i Ca 6
❑ Yes ❑ No
U
o ❑ Yes ❑ No
m0
❑ Yes ❑ No
SECTION • INFORMATION
9.1 Were any of the analyses reported in Section 7(on Tables A through C)performed by a contract laboratory or
consulting firm?
© Yes ❑ No 4 SKIP to Section 10.
9.2 Provide information for each contract laboratory or consulting firm below.
Laboratory Number t Laboratory Number 2 Laboratory Number 3
Name of laboratoryltirm Pace Analytical Services,LLC Pace Analytical Services,LLC Waypoint Analytical
a
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0
Laboratory address 205 East Meadow Road 2225 Riverside Drive 449 Springbrook Road
Suite A Asheville,NC 28804 Charlotte,NC 28217
Eden,NC 27288
Y
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ro
o Phone number
v (336)G23-8921 [phone] [phone]
Pollutant(s)analyzed TSS Metals-Aluminum/Zinc TSS
COD COD
Metals-Aluminum/Zinc
EPA Farm 3510-2F(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC5000346 Insteel Wire Products OMB No.2040-0004
SECTION ! CHECKLIST + • CERTIFICATION STATEMENT(40
10.1 In Column 1 below,mark the sections of Form 2F that you have completed and are submitting with your application. For
each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note that not
all applicants are required to complete all sections or provide attachments.
Column 9 Column 2
❑✓ Section 1 ❑ wl attachments(e.g.,responses for additional outfalls)
© Section 2 ❑ wl attachments
Section 3 wl site drainage map
✓❑ Section 4 ❑ wl attachments
❑✓ Section 5 ✓❑ wl attachments
✓❑ Section 6 ❑ wl attachments
a ❑ Section 7 ✓❑ Table A ❑ wl small business exemption request
o ❑ Table B ❑ wl analytical results as an attachment
✓❑ Table C ✓❑ Table D
U ❑� Section 8 ❑ wlattachments
73
C
CU
❑ Section 9 El wlaftachments(e.g.,responses for additional contact laboratories or firms)
s
❑� Section 10 ❑
U 10,2
Certification Statement
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible
for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete. 1 am aware that there are significant penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Name(print or type first and last name) Official Title
Greg grown Director of Manufacturing
Signature Date signed
o-a3
EPA Form 3510-2F(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Fac6ty Name Outfall Number Form Approved 03/05/19
NCS000346 Insteel Wire Products 001 OMB No.2040-0004
CONVENTIONALTABLE A. •N CONVENTIONAL PARAMETERS(40
You must provide the results of at least one anal sis for every pollutant in this table.Complete one table for each oul#all.See instructions for additicnal details and re uirements.
Maximum Daily Discharge Average Daily Discharge Source of
(specify units) (specify units) Number of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new source/new
During First Flow-Weighted ed During First Flow-Weighted Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BODS)
3. Chemical oxygen demand(COD) 200 mg/L 112 mg/L 4
4. Total suspended solids(TSS) 720 mg/L 445 mg/L 4
5. Total phosphorus
6, Total Kjeidahl nitrogen(TKN)
7, Total nitrogen(as N)
pH(minimum) 8.09 S.U. 8.35 S.U. 2
8.
pH(maximum) 8.61 S.U. 8.35 S.U. 2
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter;,subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Fonn 3510-2F(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Fadity Name Outfall Number Form Approved 03105119
NCS000346 Insteel Wire Products Outfall 002 OMB No.2040-0004
TABLE A.CONVENTiONAL AND NON CONVENTIONAL PARAMETERS(40 CFR 122.26(c)(1)(i)(E)(3))'
You must provide the results of at least one anali sis for everV pollutant in this table.Complete one table for each outfall.See instructions for additional details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
We*unas) (SW*units) Number of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new sourcelnew
During First Flo Composite
Flow-Weighted During First FlComposite Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BOD5)
3. Chemical oxygen demand(COD) 151 mg/L 79.5 mg/L 4
4. Total suspended solids(TSS) 832 mg/L 350.4 mg/L 5
5. Total phosphorus
6. Total Kjeldahl nitrogen(TKN)
7. Total nitrogen(as N)
pH(minimum) 6.97 S.U. 7.44 S.U. 3
8.
pH(maximum) 8.35 S.U. 7.44 S.U. 3
h Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Forth 3510-2F(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NCS000346 Insteel Wire Products Outfall 003 OMB No.2040-0004
TABLEA.CONVENTIONAL AND NON CONVENTIONAL '+R 4
You must provide the results of at least one anal is for every pollutant in this table.Complete one table for each outfall.See instructions for additional details and rreequirements.
Maximum Daily Discharge Average Daily Discharge Source of
(specify units) (spedfyunits) Number of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new source/new
During First Flo Composite
Flow-Weighted During First Flo Composite
Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BOD5)
3. Chemical oxygen demand(COD) 151 mg/L 44.03 mg/L 4
4. Total suspended solids(TSS) 166 mg/L 85 mg/L 4
5. Total phosphorus
6. Total Neldahl nitrogen(TKN)
7. Total nitrogen(as N)
pH(minimum) 6.84 S.U. 7.22 S.U. 2
8.
pH(maximum) 7.59 S.U. 7.22 S.U. 2
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Out(all Number Form Approved 03105119
NCS000346 Insteel Wire Products Outfall 004
OMB No.2040-0004
TABLEA.CONVENTIONAL AND •N CONVENTIONAL •+'• 41
You must provide the results of at least one analisis for every pollutant in this table.Complete one table for each outfall.See instructions for additional details and re uirements.
Maximum Daily Discharge Average Daily Discharge Source of
.(specify units) (spedfyunits) Number of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new source/new
During First Flo Composite
Flow-Weighted During First Flo Composite
Events Sampled dischargers only,use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BOD5)
3. Chemical oxygen demand(COD) 50 mg/L 32.33 mg/L 4
4. Total suspended solids(TSS) 86.5 mg/L 26.05 mg/L 4
5. Total phosphorus
6. Total iCeldahl nitrogen(TKN)
7. Total nitrogen(as N)
pH(minimum) 7.05 S.U. 7.23 S.U. 2
pH(maximum) 7.4 S.U. 7.23 S.U. 2
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Outfell Number Form Approved 03/05119
NCS000346 Insteel Wire Products Outfall 005
OMB No.2040-0004
TABLEA.CONVENTIONAL AND •N CONVENTIONAL •+ •+ +1
You must provide the results of at least one anali sis for every poIlutant in this table.Com lete one table for each outfal1.See instructions for additional details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
(specify units) (specify units) Number of Storrn Information
Pollutant or Parameter Grab Sample Taken I Grab Sample Taken (new sourcelnew
During First Flow-Weighted During First Flow-Weighted Events Sampled dischargers only,use
Composite Composite
30 Minutes 30 Minutes codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BOD5)
3. Chemical oxygen demand(COD) 73.8 mg/L 39.7 mg/L 4
4. Total suspended solids(TSS) 14.9 mg/L 9.8 mg/L 4
5. Total phosphorus
6. Total Neldahl nitrogen(TKN)
7. Total nitrogen(as N)
pH(minimum) 7.68 S.U. 7.94 S.U. 2
8.
pH(maximum) 8.2 S.U. 7.94 S.U. 2
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-217(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05119
NCS000346 Insteel Wire Products 001 OMB No.204p-0004
TABLE C.TOXIC POLLUTANTS,CERTAIN HAZARDOUS SUBSTANCES,AND ASBESTOS(40 CFR 122.26(c)(1)(i)(E)(4)and 40 CFR 122.21(g)�7)(vil)(B)and(vii))'
List each pollutant shown in Exhibits 2F-2,2F-3, and 2F4 that you know or have reason to believe is present. Complete one table for each outfall. See the instructions for additional
details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
s eci unils s eci units Number of Storm Information
Pollutant and CAS Number(if available) Grab Sample Taken Grab Sample Taken (new sourcelnew
Flow-Weighted Flow-Weighted Events Sampled
During First During First dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
Aluminum 25 mg/L 14.75 mg/L 4
Zinc 0.29 mg/L 0.23 mg/L 4
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter 1,subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F(Revised 3-19) page 11

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05l19
NCS000346 Insteel Wire Products Outfall 002
OMB No.2040-0004
TABLE • POLLUTANTS, • •'D• • 41 CFR 122.26(c)(1)(i)(E)(4)and 41 • and
List each pollutant shown in Exhibits 2F-2,2F-3,and 217-4 that you know or have reason to believe is present.Complete one table for each outfall.See the instructions for additional
details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
(sped un'ds (sped units Number of Storm Information
Pollutant and CAS Number Cfavailable) Grab Sample Taken Flow-Weighted Grab Sample Taken Flow-Weighted Events Sampled (new source/new
During First During First dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instrudions)
Aluminum 26.7 mg/L 11.83 mg/L 5
Zinc 0.205 mg/L 0.09 mg/L 5
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F(Revised 3-19) Page 11

EPA Identfficabon Number NPDES Permit Number Facx'Gty Name Outfail Number Form Approved 03/05/19
NC5000346 Insteel Wire Products Outfall 003
OMB No.2040-0004
TABLE • POLLUTANTS, A•1• • ) and 41 s
List each pollutant shown in Exhibits 2F-2,2F-3,and 2F-4 that you know or have reason to believe is present.Complete one table for each outfall.See the instructions for additional
details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
(sp units) (sp units Number of Storm Information
Pollutant and CAS Number(if available) Grab Sample Taken Grab Sample Taken (new sourcelnew
During First Flo Composite
Flow-Weighted During First Flo Composite
Events Sampled dischargers only,use
30 Minutes Composite 30 Minutes Composite codes in instructions)
Aluminum 8.82 mg/L 4.43 mg/L 4
Zinc 0.11 mg/L 0.06 mg/L 4
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-217(Revised 3-19) Page 11

EPA Identification Number NPDES Permit Number Facility Name OutfaU Number Form Approved 03105/19
NCS000346 Insteel Wire Products Outfall 004 OMB No.2040-00D4
TABLEPOLLUTANTS, " HAZARDOUS " AND ASBESTOS(40 CFR 122.26(c)(1)(i)(E)(4) 41
List each pollutant shown in Exhibits 217-2,2F-3,and 2F4 that you know or have reason to believe is present.Complete one table for each outfall.See the instructions for additional
details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
(sp units s ' units Number of Storm Information
Pollutant and CAS Number(if available) Grab Sample Taken Grab Sample Taken (new sourcelnew
During First Flo Composite
ed During First Flow-Weighted Composite
Events Sampled dischargers only,use
30 Minutes Composite 30 Minutes Composite codes in instructions)
Aluminum 3.63 mg/L 1.22 mg/L 4
Zinc 0.0481 mg/L 0.03 mg/L 4
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F(Revised 3-19) Page 11

EPA lden9calion Number NPDES Permit Number Facility Name Oulfall Number Form Approved 03/05/19
NCS000346 Insteel Wire Products Outfall 005 OMB No.2040-0004
TABLE C.TOXIC POLLUTANTS,CERTAIN HAZARDOUS SUBSTANCES,AND ASBESTOS(40 CFR 122.26(c)(1)(i)(E)(4)and 40 CFR 122.21(9)(7)(vi)(B)and(Vii)),
List each pollutant shown in Exhibits 217-2,217-3,and 2F4 that you know or have reason to believe is present.Complete one table for each outfall.See the instructions for additional
details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
un'ds) (sp units Number of Storm Information
Po[iutant and CAS:Number(if available) Grab Sample Taken Grab Sample Taken (new source/new
During First Flo Composite
Flow-Weighted During First FlComposite Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in insbucilons)
Aluminum 2.23 mg/L 1.06 mg/L 4
Zinc 0.027 mg/L 0.02 mg/L 4
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-21'(Revised 3-19) Page 11

EPA Identification Number NPDES Permit Number Facility name Outfa{l Number Form Approved 03/05/19
NCS000346 Insteel Wire Products 001 ON18 No,2040-0004
TABLE D.STORM EVENT INFORMATION1
Provide data for the storm event(s)that resulted in the maximum daily discharges for the flow-weighted composite sample.
Number of Hours Between
Total Rainfall During Maximum Flaw#date
Duration of Storm Event Beginning of Storm Measured and Total Flow from Rain Event
Date of Storm Event tin hours) Storm Event End of Previous Measurable Rain During Rain Event (in gallons or specify units)
(in inches) Event (in gpm or specify units)
08/17/2021
0.09 28,248
Provide a description of the method of flow measurement or estimate.
The Rational Method with applied Runoff Corfficients is used to estimate the Total Flow. Runoff coefficients represent the fraction of total rainfall that will be transmitted as runoff from
the drainage area that flows into facility outfall. Runoff coefficients consider the ground surface or cover material and determine the amount of storm water flow which may infiltrate or
runoff as a discharge.
EPA Form 3510-2F(Revised 3-19) Page 13

FI LE:11 WPNCIRU N OFF.XLS
STORM EVENT RAINFALL/RUNOFF CALCULATION-RATIONAL METHOD
SITE: Insteel Wire Products Company
Mount Airy,NC
DATE: 811712021
START TIME: DURATION 00:00 (HR:MIN)
ENO TIME: RAINFALL: 0.09 INCH
Combined tottal flaw: 0,028 MG 28,248 gallons
The Rational Method with applied Runoff Corficients is used to estimate the Total Flow. Runoff
coefficients represent the fraction of total rainfall that will be transmitted as runoff from the drainage
area that Flows into facility outfall. Runoff coefficients consider the ground surface or cover material
and determine the amount of storm water flow which may infiltrate or runoff as a discharge.
OUTFALL NO.: 1 SF fAC= 43560
DRAINAGE AREA: IMPERVIOUS(ac)= 1.60, C= 0.90
PERVIOUS (ac)= 0.58, C= 0.85
TOTAL AREA(ac)= 2.10,C(w)= 0.89
TOTAL FLOW: C x I x A = 4,724 (gal.)= 0.005 (MG)
OUTFALL NO.: 002
DRAINAGE AREA: IMPERVIOUS(ac)= 0,00, C= 0.90
PERVIOUS (ac)= 1.61 , C= 0,85
TOTAL AREA(ac)= 1.61 ,C(w)= 0.85
TOTAL FLOW: C x I x A = 3,345 (gal.)= 0.003 (MG}
OUTFALL NO.: 3
DRAINAGE AREA: IMPERVIOUS(ac)= 1.93, G= 0.90
PERVIOUS (ac)= 2.95, C= 0.85
TOTAL AREA(ac)= 4.88,C(w)= 0.87
TOTAL FLOW; C x I x A = 10,374 (gal.)= 0,010 (MG)
OUTFALL NO.: 4
DRAINAGE AREA: IMPERVIOUS(ac)= 0.00, C= 0.90
PERVIOUS (ac)= 3.97, C= 0.85
TOTAL AREA(ac)= 3.97,C(w)= 0.85
TOTAL FLOW: C x I x A _ 8,247 (gal.)= 0.008 (MG)
OUTFALL NO.: 5
DRAINAGE AREA: IMPERVIOUS(ac)= 0.00, C= 0.90
PERVIOUS (ac)= 0.75, C= 0.85
TOTAL AREA(ac)= 0.75,C(w)= 0.85
TOTAL FLOW: C x I x A = 1,558 (gal,)= 0.002 (MG)
Note:The typical"C"cceffioients refer to"Design and Construction of Sanitary and Storm Sewers",
American Society of Civil Engineers,Manual of Practice,page 37,New York.
Surface Coefficient
Transportation impervious 0.95
Transportation Pervious(gravel; 0.85
Roof Impervious 0.90
Managed Pervlous(lawn/landscaped; 0.15

Outfal[Coordinates DRAIRAOEARPAOUTFALL, 001 002 003 ou 005
Watershed Boundaries
Rivers IMPERVIOUS AREA(ACRES) 1.60 0.00 193 0.00 C.00
y Tributary to Lovills Creek
Stormwater Flow TOTAL,DRAINAGE AREA(ACRES) 2.18 1.61 4.66 3.97 0.75
Outfall 001 X:-80.607302 IMPERVIOUS PERCENTAGE 73.4% 0.0% 40.2% 0.0% __ 0.0%
Y:36.475285
i
Outfal[002 X:-80-608092 0
Y:36.476806
n
Dukfali 003 X:-80-609162
m
Y;36.475743
x
Outfal1004 X:-80.609041
Y:36.476586
Outfall005 X:-90.612078
Y:36.476146 \
311i � lT � --------- ---- --
� r �l � P.
- -------------------- -----
------------------------------------
REf
1
y A�
I
d
FIGU 2-DRAINAGE&DUTFALLS PROJECT NO:100428224A <�)
Instee)Wire Products DATE:6/25/201B antedgraup
1510 Carter Street SCALE:NTS
35310 Toringdon Way
Mount Airy,NC 27030 DRAWN EY:JOS Charlotte,North Carolina 28277

anteaLgroup
Non — Stormwater Discharge Assessment and Certification
Insteel Wire Products
1510 Carter Street
Mount Airy, NIC
DATE OF TEST OUTFALL METHOD DESCRIBE RESULTS IDENTIFICATION NAME OR
OR DIRECTLY USED TO FROM TEST FOR OF PERSON(S)
EVALUATION OBSERVED TEST OR PRESENCE OF NON- POTENTIAL CONDUCTING
DURING EVALUATE STORM SIGNIFICANT TEST OR
THE TEST DISCHARGE WATER DISCHARGE SOURCES EVALUATION
5/11/2023 001 Visual NO FLOW N/A Bernice McGriff
(over 72 hours DISCHARGE
from the last 002 Visual NO FLOW N/A Bernice McGriff
rain event) DISCHARGE
003 Visual NO FLOW N/A Bernice McGriff
DISCHARGE
004 Visual NO FLOW N/A Bernice McGriff
DISCHARGE
005 Visual NO FLOW N/A Bernice McGriff
DISCHARGE`
CERTIFICATION
I, Eric Wu certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel properly gather
and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system
or those persons directly responsible for gathering the information, the information submitted is, to the best of
my knowledge and belief, 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.
ZL-r— W - �a— 5/11/2023
Signature Date
Eric Wu Senior Consultant
Name Title
�I NOGEN*
ALLIANCE us.anteagroup.com
1

SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
Initials
1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
6 12.
building locations and impervious surfaces should be clearly noted.A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data.
3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted.
4. A summary of the Best Management Practices utilized at the pennitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any BMP's is planned, please include
information on these BMP's.
5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)

Outfal{Coordinates
Outfall 001
X:-80.fi07302
OutFall 002 -
X:•80.Q8092
Y;3fi.976806 _
Outfall DD3
X:•SD.609441 ...
Y:36.476586
Outfall 004
Y:36.476809 +
Outfall DOS ' T
X:•80.612D78 �. �� '�'
Y:36.476146 t
M r
rester R10
mA
FIGURE 1-Aerial Map PBolECTNa:18042B224A U
Insteel Wire Products DATE:1/17/2019 anteagroup
1510 Carter Street SCALE:NTS 353DToringdon Way
Mount Airy,NC 27030 DRAWN BY:KVB Charlotte,North Carolina 29277

Outfall Coordinates
Outfall pp1
X:•Sp.6p7302
Y:36.4752$5 - �
Outfail pp2 Y
X:-$p.08092
Y:36.476806 -
Outfa3l pp3
X:-80.609041 __
Y:36.476586
Qutfa110p4
Ile
Y36,a768a9
Outfa11005 s, l; r
X:-80.612078
�p� r
� � w
1
as
FIGURE 1-Aerial Map PROJECT NO:18042R224A
Insteel Wire Products DATE:1/27/2019 anteagroup
1510 Carter Street SCALL NTS 3530Toringdon Way
Mount Airy,NC 27030 DRAWN BY:NV8 Charlotte,North Carolina 28277

Insteel Wire Products
Mount Airy, NC
2020-2022 Analytical Data Summary Tables
Date TSS COD Aluminum Zinc pH
Unit mg/L mg/L mg/L mg/L S.U.
Outfall1 5/21/2020 720 200 25 0,29
Outfall2 5/21/2020 46 10 2.3 0.027
Outfall3 5/21/2020 10 10 0.95 0.027 -
Outfall4 5/21/2020 0.7 10 0.64 0.027 -
Outfall5 5/21/2020 2.7 10 0.78 0.027 -
Outfall2 7/21/2020 6 0.03 0.01 6.97
Outfall1 2/12/2021 300 117 16.8 0.245 -
Outfall2 2/12/2021 74 50 6.14 0.034 -
Outfall3 2/12/2021 33 50 2.95 0.063 -
0utfa114 2/12/2021 4 50 0.236 0.02 -
Outfall5 2/12/2021 7.6 50 2.23 0.02 -
Outfalll 8/17/2021 101 25 2.6 0.056 8.61
Outfall2 8/17/2021 832 107 24 0.18 8.35
Outfall3 8/17/2021 131 51.4 5 0.057 6.84
Outfall4 8/17/2021 13 251 0.36 0.011 7.4
Outfall5 8/17/2021 14 25 0.41 0.01 8.2
Outfall1 5/25/2022 659 106 14.6 0.245 8.09
Outfall2 5/25/2022 794 151 26.7 0.205 7.01
Outfall3 5/25/2022 166 64.7 8.82 0.11 7.59
Outfall4 5/25/2022 86.5 44.3 3.63 0.0481 7.05
Outfall5 5/25/2022 14.9 73.8 0.829 0.02 7.68
Max Value - 832.00 200.001 26.70 0.29 8.61
Average Value I - 191.21 6L511 6.911 0.08 7.62
TSS COD
Max Value Avg Value Max Value Aug Value
Unit mg/L mg/L Unit mg/L mg/L
Outfall1 720 445.00 Outfall1 200 112
Outfall 2 832 350.40 Outfa1] 2 151 79.5
Outfall3 166 85.00 Outfall3 1 64.71 44.025
Outfall4 86.5 26.05 Outfa114 1 501 32.325
Outfall5 14.9 9.80 Outfall5 1 73.8 39.7

lnsteel Wire Products
Mount Airy, NC
2020-2022 Analytical Data Summary Tables
Date TSS COD Aluminum Zinc pH
Unit mg/L mg/L mg/L mg/L S.U.
Outfall1 5/21/2020 720 200 25 0.29 -
Outfall2 5/21/2020 46 10 2.3 0.027 -
Outfall3 5/21/2020 10 10 0.95 0.027 -
Outfall4 5/21/2020 0.7 10 0.64 0.027 -
Outfall5 5/21/2020 2.7 10 0.78 0.027 -
Outfall2 7/21/2020 6 - 0.03 0.01 6.97
Outfall1 2/12/2021 300 117 16.8 0.245 -
0utfa112 2/12/2021 74 501 6.14 0.034 -
Outfall3 2/12/2021 33 50 2.95 0.063 -
Outfall4 2/12/2021 4 50 0.236 0.02 -
Outfall5 2/12/2021 7.6 50 2.23 0.02 -
Outfalll 8/17/2021 101 25 2.6 0.056 8.61
Outfall2 8/17/2021 832 107 24 0.18 8.35
Outfall3 8/17/2021 131 51.4 5 0.057 6.94
Outfall4 8/17/2021 13 25 0.36 0.011 7.4
Outfall5 8/17/2021 14 25 0.41 0.01 8.2
Outfall1 5/25/2022 659 106 14.6 0.245 8.09
Outfall2 5/25/2022 794 151 26.7 0.205 7.01
Outfall3 5/25/2022 166 64.7 8.82 0.11 7.59
Outfall4 5/25/2022 86.5 44.3 3.63 0.0481 7.05
Outfall5 5/25/2022 14.9 73.8 0.829 0.02 7.68
Max Value - 832.00 200.00 26.70 0.29 8.61
Average Value - 191.21 61.51 6.91 0.08 7.62
TSS COD
Max Value Avg Value Max Value Avg Value
Unit mg/L mg/L Unit mg/L mg/L
Outfall1 720 445.00 Outfall1 200 112
Outfall2 832 350.40 Outfall2 151 79.5
Outfall3 166 85.00 Outfall3 64.7 44.025
Outfall4 96.5 26.05 Outfall4 1 Sol 32.325
Outfall5 14.9 9.80 [Outfall 5 1 73.81 39.7

Aluminum Zinc
Max Value Avg Value Max Value Avg Value
Unit mg/L mg/L Unit mg/L mg/L
Outfall1 25 14.75 Outfall1 0.29 0.21
Outfall2 26.7 11.83 Outfall2 0.205 0.09
Outfall3 8.821 4.43 Outfall3 0.111 0.06
Outfall4 3.631 1.22 Outfall4 0.0481 0.03
Outfall5 2.231 1.06 Outfall5 0.0271 0.02
pH
Max Value Avg Value Min Value
Unit S.U. S.U. S.U.
Outfall1 8.61 8.35 8.09
Outfall2 8.35 7.44 6.97
Outfall3 7.591 7.221 6.84
Outfall4 7.41 7.231 7.05
Outfall5 8.21 7.941 7.68

Aluminum Zinc
Max Value Avg Value Max Value Avg Value
Unit mg/L mg/L Unit mg/L mg/L
Outfall1 25 14.75 Outfall1 0.29 0.21
Outfall2 26.7 11.83 Outfall2 0.205 0.09
Outfall3 8.82 4.43 Outfall3 0.11 0.06
Outfall4 3.63 1.22 Outfall4 0.0481 0.03
Outfall5 2.23 1.06 Outfall5 0.027 0.02
pH
Max Value Avg Value Min Value
Unit S.U. S.U. S.U.
Outfall1 8.61 8.35 8.09
Outfall2 8.35 7.44 6.97
Outfall3 7.591 7.221 6.84
Outfall4 7.41 7.231 7.05
Outfall5 8.21 7.941 7.68

Insteel Wire Products
Mount Airy, NC
2021-2023 Visual Monitoring Summary Table
Date Color Odor Clarity* Floating Solids* Suspended Solids* Foam Oil Sheen Erosion/Deposition
Outfall 1 8/17/2021 light brown none 3 1 3 N N N
Outfall 2 8/17/2021 light brown none 5 1 2 N N N
Outfall 3 8/17/2021 light brown none 3 1 2 N N N
Outfall 4 8/17/2021 very light brown none 1 1 1 N N N
Outfall 5 8/17/2021 very light nrown none 1 1 1 N N N
Outfall 1 5/23/2022 light brown none 4 2 4 N N N
Outfall 2 5/23/2022 light brown none 3 1 3 N N N
Outfall 3 5/23/2022 light brown none 2 1 3 N N N
Outfall 4 5/23/2022 light brown none 2 1 4 N N N
Outfall 5 5/23/2022 light gray none 1 1 1 N N N
Outfall1 4/22/2023 brown none 3 1 2 N N N
Outfall2 4/22/2023 brown none 2 1 2 N N N
Outfall 3 4/22/2023 brown, gray none 2 1 2 N N N
Outfall4 4/22/2023 brown none 1 1 2 N N N
Outfall5 4/22/2023 brown none 1 1 2 N N N
*On a scale of 1 to 5,where 1 is dear/no solids
N = No/not present

Insteel Wire Products
Mount Airy, NC
2021-2023 Visual Monitoring Summary Table
Date Color Odor Clarity* Floating Solids* Suspended Solids* Foam Oil Sheen Erosion/Deposition
Outfall 1 8/17/2021 light brown none 3 1 3 N N N
Outfall 2 8/17/2021 light brown none 5 1 2 N N N
Outfall 3 8/17/2021 light brown none 3 1 2 N N N
Outfall 4 8/17/2021 very light brown none 1 1 1 N N N
Outfall 5 8/17/2021 very light nrown none 1 1 1 N N N
Outfall 1 5/23/2022 light brown none 4 2 4 N N N
Outfall 2 5/23/2022 light brown none 3 1 3 N N N
Outfall 3 5/23/2022 light brown none 2 1 3 N N N
Outfall 4 5/23/2022 light brown none 2 1 4 N N N
Outfall 5 5/23/2022 light gray none 1 1 1 N N N
Outfall1 4/22/2023 brown none 3 1 2 N N N
Outfall2 4/22/2023 brown none 2 1 2 N N N
Outfall 3 4/22/2023 brown,gray none 2 1 2 N N N
Outfall4 4/22/2023 brown none 1 1 2 N N N
Outfall5 4/22/2023 brown none 1 1 2 N N N
*On a scale of 1to 5,where 1 is clear/no solids
N = No/not present

Insteel Wire Products
Mount Airy, NC
Best Management Practices Summary
The ground surface surrounding the main facility building, including the parking lots,and
shipping/receiving areas is paved.The wire storage area is covered by gravel.Grass covers the other
unpaved ground surface to prevent erosion.Absorbent socks surround each outfall to prevent potential
contamination leaving off site. Bales of hay surround Outfalls 001,002, and 003 to prevent
sedimentation.

Insteel Wire Products
Mount Airy, NC
Best Management Practices Summary
The ground surface surrounding the main facility building, including the parking lots,and
shipping/receiving areas is paved.The wire storage area is covered by gravel.Grass covers the other
unpaved ground surface to prevent erosion.Absorbent socks surround each outfall to prevent potential
contamination leaving off site. Bales of hay surround Outfalls 001,002, and 003 to prevent
sedimentation.

Insteel Wire Products
Mount Airy, NC
Significant Changes
There have been no significant changes in industrial activities at this facility.

Insteel Wire Products
Mount Airy, NC
Significant Changes
There have been no significant changes in industrial activities at this facility.

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources—Stormwater Program
Facility Dame: Msteal Wife Products
Permit Number: NGS000346
Location Address: 1510 Carter Street
Mount Airy,NC 27030
County:
Surry County
� n
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Certification. DO NOT
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
Signature w/� Date ���-"U
Greg Brown Director of Manufacturing
Print or type name of person signing above Title
SPPP Certification 10/13