NC0020354_Response to NOV-2023--LV-0860_Chatham Park Water Recovery Center_20231127

November 27, 2023
North Carolina Department of Environmental Quality
Division of Water Resources
Attn: Vanessa E. Manuel, Assistant Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
RE: Notice of Violation & Intent to Assess Civil Penalty
Tracking Number: NOV-2023-LV-0860
Chatham Park Recovery Center
Chatham County
Dear Ms. Manuel:
This letter is in response to the NCDEQ-DWR letter of November 21, 2023 regarding the violation
that was identified through the review of discharge monitoring reports (DMRs) for the September
2023 monitoring period.
The letter identified one exceedance for this period and was identified as Daily Maximum
Exceeded for BOD, 5-Day (20 Deg. C) — Concentration (C0310).
This exceedance can be attributed to the low flow and the inability to perform efficient treatment at
the low flows experienced by the facility. The average flow for this period was 21,000 gallons per
day which is less than 5 percent of permitted flow, which leads to treatment inefficiencies. Effluent
sampling results for the day previous were < 2.0 mg/L and the day following 2.2 mg/L, with no
operational changes or modifications to plant operations. With an increase in flow, the plant will
be able to more efficiently provide adequate and efficient treatment.
Thank you again for continuing to work with the Chatham Park Water Recovery Center. We look
forward to working with NCDEQ-DWR in a very positive and proactive manner as we continue to
improve the facility's environmental stewardship. If upon receipt and review of this information
you have any questions or would like to discuss this matter at greater length, please do not hesitate
to contact me at your earliest convenience at [phone] or Tim Smith at [phone].

Sincerely,
McKim & Creed
a'4��7 0, Ileav
;14
James W. Holland, PE
Process Group Leader
cc: Tim Smith
File