NC0055786_Pretreatment Compliance Inspection_20191009

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
NORTH CAROLINA
Environmental Quality
October 9, 2019
Mr. Tom Johnson — Water Resources Director.
City of Lexington
28 West Center Street
Lexington, North Carolina 27292
SUBJECT: Pretreatment Compliance Inspection (PCI)
City of Lexington
NPDES# NCO055786
Davidson County
Dear Mr. Johnson:
On September 10, 2019 a Pretreatment Compliance Inspection (PCI) was performed by Jim Gonsiewski of
the Winston-Salem Regional Office. Ms. Eglantina Minerali was present for the inspection. The purpose of
this inspection was to determine the effectiveness of the Town's pretreatment program, which includes
reviewing the files, including industrial monitoring data, POTW plant performance, industry monitoring
data, and adherence to the enforcement response plan (ERP).
Background
The City has five (5) Significant Industrial Users (SIUs), four (4) of which are categorical. The treatment
plant is permitted for 6.5 MGD.
POTW Interview
Ammonia was exceeded in June and July 2019. The composting equipment was repaired which eliminated
the exceedances.
Pretreatment Program Elements Review
The Headworks Analysis (HWA) renewal was submitted on January 9, 2015. The HWA was approved on
June 10, 2015. The next HWA is due on January 6, 2020.
The last Industrial Waste Survey (IWS) was submitted on January 9, 2015. The IWS was approved on
February 6, 2015. The next IWS is due on April 1, 2020.
The Sewer Use Ordinance (SUO) was approved on January 9, 2013.
The Enforcement Response Plan (ERP) was approved on July 2, 2010.
The Long Term Monitoring Plan (LTMP) was approved on November 4, 2016.
D E Q�p North Carolina Department of Environmental Quality I Division of Water Resources
Winston-Salem Regional Office 1 450 West Hanes Mill Road, Suite 300 I Winston-Salem, North Carolina 27105
NORTH CAROLINA
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LTMP File Review
The Long Term Monitoring Plan (LTMP) is being conducted at the proper locations and frequencies.
Industrial User Permit (IUP) File Review
None of the five (5) SIUs were in significant noncompliance (SNC) in 2018.
A review of the file for ASCO (#0038) revealed that the monitoring data was well organized and compliant.
A review of the file for Matcor (#0012) revealed that the monitoring data was well organized and compliant.
A review of the file for Proctor, Inc. (#0028) revealed that the monitoring data was well organized and
compliant.
The slug control plan for ASCO (#0038) was in good order.
The slug control plan for Matcor (#0012) was in good order.
The slug control plan for Proctor, Inc. (#0028) was in good order.
Action Items
No other action items were noted.
The pretreatment program is considered satisfactory. Ms. Minerali continues to maintain an effective
pretreatment program. If you have any questions please contact Jim Gonsiewski or me at [phone].
Sincerely,
Docu Siiggned by:
(fin.
145B49E225C94EA...
Lon T. Snider
Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ — WSRO
cc: PERCS Unit — Monti Hassan (Electronic Copy)
Eglantina Minerali — City of Lexington (Electronic Copy)