NC0026689_Pretreatment Compliance Inspection Report_20201231

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANI£L SMITH
Director
Troy Branch
Pretreatment Coordinator
Town of Denton
P.O. Box 306
Denton, North Carolina 27239
NORTH CAROLINA
Environmental Quality
December 31, 2020
SUBJECT: Pretreatment Compliance Inspection (PCI)
Town of Denton
NPDES# NCO026689
Davidson County
Dear Mr. Branch:
On December 17, 2020, a Pretreatment Compliance Inspection (PCI) was performed by Jim
Gonsiewski and Alex Lowe of the Winston-Salem Regional Office. Mr. Troy Branch 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, POTW plant performance, industry
monitoring data, and adherence to the enforcement response plan (ERP).
Background
This is a 0.8 MGD permitted facility. The Town has one (1) Significant Industrial User (SIU)
which is not categorical. The publicly owned treatment works (POTW) has had three exceedances
of dichlorobromomethane in December 2019, March 2020, and July 2020. This has been a
recurring problem. The Town is actively working to eliminate this constituent and has taken
several remediation steps. The concentrations have been significantly reduced.
POTW Interview
There are no plant problems related to pretreatment issues and, other than dichlorobromomethane,
there are no NPDES permit limit or monitoring violations recorded from November 2019 through
November 2020. The facility is very well operated.
Pretreatment Program Elements Review
The Headworks Analysis (HWA) renewal was submitted on September 7, 2016. The HWA was
approved on November 10, 2016. The next HWA is due on September 1, 2021.
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North Carolina Department of Environmental Quality 1 Division of Water Resources
Winston-Salem Regional Office 1 450 West Hanes Mill Road, Suite 300 1 Winston-Salem, North Carolina 27105
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The last Industrial Waste Survey (IWS) was submitted on May 11, 2020. The IWS was approved
on August 5, 2020. The next IWS is due on March 31, 2025.
The Sewer Use Ordinance (SUO) was approved on January 18, 2013.
The Enforcement Response Plan (ERP) was approved on March 17, 2020.
The Short -Term Monitoring Plan (STMP) was approved on October 24, 2017.
STMP File Review
The STMP is being conducted at the proper locations and frequencies.
Industrial User Permit (IUP) File Review
The SIU was in compliance in 2020.
A review of the file for Century Hosiery (90001) revealed that the monitoring data was well
organized and compliant.
The slug control plan for Century Hosiery (90001) was in good order.
Action Items
No other action items were noted.
The pretreatment program is considered satisfactory. Mr. Branch runs an excellent pretreatment
program. If you have any questions please contact Jim Gonsiewski or me at [phone].
Sincerely,
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Ln.maer Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ — WSRO
Enclosure: PCI Report
cc: PERCS Unit — Mike Montebello (Electronic Copy)
WSRO Electronic Files
Laserfiche Files