NC0020567_202305PCI_20230602

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Nicole Johnston
Executive Director
Yadkin Valley Sewer Authority
PO Box 828
Elkin, NC 28621
NORTH CAROLINA
Environmental Quality
June 14, 2023
SUBJECT: Pretreatment Compliance Inspection (PCI)
Yadkin Valley Sewer Authority WWTP
Main Program Permit (NPDES) #NC0020567
Surry County
Dear Ms. Johnston:
On 5/25/2023 a Pretreatment Compliance Inspection (PCI) was performed by Tricia Lowery of the
Winston-Salem Regional Office. Dave Johnson, Portia Hayes, and Nikki Hembree were present for the
inspection. The purpose of this inspection was to determine the effectiveness of the Authority's
pretreatment program, which includes reviewing the files, POTW plant performance, industry monitoring
data, and adherence to the enforcement response plan (ERP).
Background
This is a 1.8 MGD permitted facility. The Authority has 1 Significant Industrial Users (SIUs) and is not
categorical. The publicly owned treatment works (POTW) had no violations in 2022 and no violations in
the first 5 months of 2023. This is a modified pretreatment program.
POTW Interview
There are no POTW problems related to pretreatment. PGW was not in SNC. The Authority is awaiting
approval for the SUO and HWA after submitting several years ago.
Pretreatment Program Elements Review
The Headworks Analysis (HWA) is still awaiting approval from the 11/6/2020 submittal. The next HWA
due is TBA.
The IWS was last approved on 4/24/2023. The next IWS is due 4/2028.
The Sewer Use Ordinance (SUO) was approved on 12/15/11. SUO 3Yd edition was submitted 411912013
and awaiting approval.
The Enforcement Response Plan (ERP) was submitted on 6/1/2020 and approved on 9/2/2020.
The Short -Term Monitoring Plan (STMP) was submitted 10/17/2019 and approved on 2/12/2020.
DffNorth Carolina Department of Environmental Quality I Division of Water Resources
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Winston-Salem Regional Office 1 450 W. Hanes Mill Rd, Suite 300 I Winston-Salem, North Carolina 27105
M336.776.9800
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STMP File Review
The Short -Term Monitoring Plan (STMP) is being conducted at the proper locations and frequencies.
Industrial User Permit (IUP) File Review
A review of the file for PGW (Vitro) #IWP001 revealed that the monitoring data was well organized and
compliant.
The slug control plan for PGW (Vitro) #IWP001 was in good order.
Action Items
No other action items were noted.
The pretreatment program is considered satisfactory. Yadkin Valley Sewer Authority runs an adequate
pretreatment program. If you have any questions, please contact Tricia Lowery or me at [phone].
Sincerely,
DocuSiiggned by:
1 _"49E225C94EA...
Lon T. Snider
Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ — WSRO
Attachment:
NC DWR Pretreatment Compliance Inspection (PCI) Report
REQ� North Carolina Department ofEnvironmental Quality I Division ofWater Resources
Winston-Salem Regional Office 1 450 W. Hanes Mill Rd, Suite 300 1 Raleigh, North Carolina 27105
NORTH CAROLINA 336.776.9800
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NORTH CAROLINA DIVISION OF WATER RESOURCES
PRETREATMENT COMPLIANCE INSPECTION (PCI) REPORT
Water Resources
ENVIRONMENTAL QUALITY
BACKGROUND INFORMATION [Complete Prior To PCI; Review Program Info Database Sheet(s)]
1. Control Authority (POTW) Name: Yadkin Valley Sewer Authority
2. Control Authority Representative(s): Nicole Johnston; Dave Johnson; Portia Haves; Nikki Hembree
3. Title(s): Executive Director; Asst. Executive Director; Administrative Assistants
4. Last Inspection Date: 12/9/2021 Inspection Type (Check One): ❑ PCI ® Audit
5. Has Program Completed All Requirements from the Previous Inspection and Program Info Sheet(s)? N YES ❑ NO
6. Is POTW under an Order That Includes Pretreatment Conditions? ❑ YES ® NO
Order Type, Number, Parameters:
Are Milestone Dates Being Met? ❑ YES ❑ NO
ICIS CODING
Main Program Permit Number MM/DD/YY
NC 0020567 Permit expires: 1/31/2024
7. Current Number Of Significant Industrial Users SIUs ?
1
8. Number of SIUs With No IUP, or With an Expired IUP?
0
9. Number of SIUs Not Inspected By POTW in the Last Calendar Year?
0
10. Number of SIUs Not Sampled By POTW in the Last Calendar Year?
0
11. Number of SIUs In SNC For Limits Violations During Either of the Last 2 Semi -Annual
Periods?
0
12. Number of SIUs in SNC For Reporting During Either of the Last 2 Semi -Annual Periods?
0
13. Number of SIUs in SNC with Pretreatment Schedule?
0
14. Number of SIUs on Schedules?
0
15. Current Number Of Categorical Industrial Users CIUs ?
0
16. Number of CIUs in SNC?
0
POTW INTERVIEW
17. Since the Last PCI, has the POTW had any NPDES Limits Violations?
If Yes, What are the Parameters and How are these Problems Being Addressed?
18. Since the Last PCI, has the POTW had any Problems Related to an Industrial
Discharge (Interference, Pass -Through, Blockage, Citizens' Complaints, Increased
Sludge Production, Etc.)?
If Yes, How are these Problems Being Addressed?
19. Which Industries have been in SNC for Limits or Reporting during either of the
Last 2 Semi -Annual Periods? Not Been Published for Public Notice?(May refer to
PAR if Excessive SIUs in SNC)
20. Which Industries are on Compliance Schedules or Orders? For all SIUs on an
Order, Has a Signed Copy of the Order been sent to the Division?
21. Are Any Permits or Civil Penalties Currently Under Adjudication? If Yes, Whicb
Ones?
❑ YES N NO
❑ YES ONO
SNC for Limits: NA
SNC for Reporting: NA
Not Published: NA
None
❑ YES ® NO
LTMP/STMP FILE REVIEW:
NC DWR Pretreatment Compliance Inspection (PCI) Form Updated August 2022
Page 1

22. Is LTMP/STMP Monitoring Being Conducted at Appropriate Locations and Frequencies? ®YES ❑ NO
23. Are Correct Detection Levels being used for all LTMP/STMP Monitoring? NYES ❑ NO
24. Is LTMP/STMP Data Maintained in a Table or Equivalent? NYES ❑ NO Is Table Adequate? OYES ❑ NO
25. All LTMP/STMP effluent data reported on Discharge Monitoring Report? MYES ❑ NO (Division Inspector, please verify
yourseIP) Reviewed 2022 & 2023 DMR with SMTP data. No discrepancies found. Files in good order.
26. If NO to 23 - 26, list violations
27. Should any Pollutants of Concern be Eliminated from or Added to LTMP/STMP? ❑ YES M NO
If yes, which ones? Eliminated:
Added:
28. PRETREATMENT PROGRAM ELEMENTS REVIEW— Please review POTW files, verify POTW has copy of Program Element
in their files. complete with suDDortine documents and cony of PERCS ADDroval Letter. and dates consistent with Program Info:
Program Element
Last Submittal
Last Approval
Date Next Due,
Date In file?
Date In file
If Applicable
Headworks Analysis (HWA)
11/6/2020
N Yes ❑ No
Awaiting
❑ Yes M No
*TBA
approval
Industrial Waste Survey (IWS)
4/1/2023
M Yes ❑ No
4/24/2023
M Yes ❑ No
4/l/2028
Sewer Use Ordinance (SUO)
4/19/2013
M Yes ❑ No
12/15/2011
❑ Yes M No
*See
comments
Enforcement Response Plan (ERP)
6/1/2020
M Yes ❑ No
9/2/2020
N Yes ❑ No
SHORT Term Monitoring Plan
10/17/2019
M Yes ❑ No
2/12/2020
N Yes ❑ No
(STMP)
*Comments: Third revision was completed 4/9/2013. Awaiting approval letter. HWA was submitted 11/6/2020 — awaiting
approval.
NC DWR Pretreatment Compliance Inspection (PCI) Form Updated August 2022 Page 2

INDUSTRIAL USER PERMIT (IUP) FILE REVIEW (3 IUP FILE REVIEWS OR l FILE REVIEW AND 1 IU INSPECTION)
29. User Name
1. PGW (Vitro)
2.
3.
30. IUP Number
IWP001
31. Does File Contain Current Permit?
N Yes ❑ No ji
❑ Yes ❑ No II
❑ Yes ❑ No II
32. Permit Expiration Date
12/31/2025
33. Categorical Standard Applied (I.E. 40 CFR, Etc.) Or
NA
N/A
34. Does File Contain Permit Application Completed
M Yes ❑ No
❑ Yes ❑ No
❑ Yes ❑ No
Within One Year Prior to Permit Issue Date?
35. Does File Contain an Inspection Completed Within
M Yes ❑ No
❑ Yes ❑ No
❑ Yes ❑ No
Last Calendar Year?
36. a. Does the File Contain a Slug/Spill Control Plan?
a M Yes ❑ No
a. ❑ Yes ❑ No
a. El Yes El No
b. If No, is One Needed? (See Inspection Form from
b. El Yes El No
b. El Yes El No:::]
b. ❑ Yes ❑ No
POTW
37. For 40 CFR 413 and 433 TTO Certification, Does
❑ Yes ❑ No M NA
❑ Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
File Contain a Toxic Organic Management Plan
TOMP ?
38. a. Does File Contain Original Permit Review Letter
a. ®Yes ❑No
a. ❑Yes ❑No
a. ❑Yes ❑No
from the Division?
b. All Issues Resolved?
b. ❑ Yes ❑ No N/A ®
b. ❑ Yes ❑ No N/A ❑
b. ❑ Yes ❑ No N/A ❑
39. During the Most Recent Semi -Annual Period, Did the
M Yes ❑ No
N Yes ❑ No
❑ Yes ❑ No
POTW Complete its Sampling as Required by IUP,
including flow?
40. Does File Contain POTW Sampling Chain -Of-
11
M Yes ❑ No
❑ Yes ❑ No
❑ Yes ❑ No
Custody Forms?
41. During the Most Recent Semi -Annual Period, Did the
M Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
SIU Complete its Sampling as Required by IUP,
including flow?
41b. During the Most Recent Semi -Annual Period, Did
M Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
SIU submit all reports on time?
42a. For categorical IUs with Combined Wastestream
❑ Yes ❑ No M NA
❑ Yes ❑ No ❑ NA
N Yes ❑ No ❑ NA
Formula (CWF), does file include process/dilution
flows as Required by IUP?
42b. For categorical IUs with Production based limits,
❑ Yes ❑ No M NA
❑ Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
does file include production rates and/or flows as
Required by IUP?
43a. During the Most Recent Semi -Annual Period, Did
M Yes ❑ No
❑ Yes ❑ No
❑ Yes ❑ No
the POTW Identify All Limits Non -Compliance from
Both POTW and SIU Sampling?
43b. During the Most Recent Semi -Annual Period, Did
❑ Yes ❑ No M NA
❑ Yes ❑ No ❑ NA
❑ Yes ❑ No ❑ NA
the POTW Identify All Reporting Non -Compliance
from SIU Sampling?
44. a. Was the POTW Notified by SIU (Within 24 Hours)
a. ❑ Yes ❑ No ® NA
a. ❑ Yes ❑ No ❑ NA
a. ❑ Yes ❑ No ❑ NA
of All Self- Monitoring Violations?
b. Did Industry Resample and submit results to POTW
b ❑ Yes ❑ No ® N/A
b ❑ Yes ❑ No ❑ N/A
b ❑ Yes ❑ No ❑ N/A
Within 30 Days?
c. If applicable, Did POTW resample within 30 days
c. ❑ Yes ❑ No ® N/A
c. ❑ Yes ❑ No ❑ N/A
c. ❑ Yes ❑ No ❑ N/A
of becoming aware of SIU limit violations in the
POTW's sampling of the SIU?
46. During the Most Recent Semi -Annual Period, Was
❑ Yes M No
❑ Yes ❑ No
❑ Yes ❑ No
the SIU in SNC?
47. During the Most Recent Semi -Annual Period, Was
❑Yes ❑ No ® N/A
❑Yes ❑ No ❑ N/A
❑Yes ❑ No ❑ N/A
Enforcement Taken as Specified in the POTW's ERP
OVs, Penalties, timing, etc.)?
48. Does the File Contain Penalty Assessment Notices?
❑ Yes ❑ No M NA Jill&
❑ No ❑ NA
❑ Yes ❑ No ❑ NA
NC DWR Pretreatment Compliance Inspection (PCI) Form Updated August 2022 Page 3

49. Does The File Contain Proof Of Penalty Collection?
50. a. Does the File Contain Any Current Enforcement
Orders?
b. Is SIU in Compliance with Order?
51. Did the POTW Representative Have Difficulty in
Obtaining Any of This Requested Information For
You?
FILE REVIEW COMMENTS:
• All files are well organized and orderly.
❑ Yes ❑ No M NA 11
❑ Yes ❑ No M NA
❑ Yes ❑ No ❑ NA
a. ❑ Yes ❑ No N/A N
b ❑ Yes ❑ No N/A N
a. ❑ Yes ❑ No N/A ❑
b ❑ Yes ❑ No N/A ❑
a. ❑ Yes ❑ No N/A ❑
b ❑ Yes ❑ No N/A ❑
❑ Yes M No
❑ Yes ❑ No
❑ Yes ❑ No
• 2022 & 2023 DMR were reviewed against STMP data. Data recorded correctly with no discrepancies noted.
• Reviewed dental amalgam files. All forms submitted as required.
• STMP being conducted as required.
• PGW files are complete and contain all required documentation.
NO AUDIT CONDUCTED
INDUSTRY INSPECTION ICIS CODING:
Main Program Permit Number MM/DD/YY
1. Industry Inspected:_
2. Industry Address:
3. Type of Industry/Product
4. Industry Contact: Title:
Phone: Fax:
5. Does the POTW Use the Division Model Inspection Form or Equivalent? ❑ YES ❑ NO
6. Did the POTW Contact Conduct the Following Parts of the Industrial Inspection Thoroughly?
Comments:
A. Initial Interview ❑ YES ❑ NO
B. Plant Tour ❑ YES ❑ NO
C. Pretreatment Tour ❑ YES ❑ NO
NC DWR Pretreatment Compliance Inspection (PCI) Form Updated August 2022 Page 4

D. Sampling Review ❑ YES ❑ NO
E. Exit Interview ❑ YES ❑ NO
Industrial Inspection Comments:
OVERALL SUMMARY AND COMMENTS:
Comments: Ms. Johnston and staff run an excellent pretreatment program.
Requirements:
Recommendations:
NOD: ❑YES ENO
NOV: ❑YES ENO
QNCR: ❑YES M NO
POTW Rating:
Satisfactory M Marginal ❑ Unsatisfactory-0
PCI COMPLETED BY: Tricia Lowery DATE: 5/25/2023
NC DWR Pretreatment Compliance Inspection (PCI) Form Updated August 2022 Page 5