WQ0023580_Response to Notice_20230929

TCW
WASTEWATER
tcwwastewater.com
704.776.4443
September 28, 2023
Andrew Pitner
Division of Water Resources, NCDEQ
Water Quality Regional Operations Section
Mooresville Regional Office
610 East Center Ave. Suite 301
Mooresville, NC 28115
RE: NOV-2023-PC-0461 Permit #WQ0023580
Dear Mr. Pitner,
In response to your letter concerning the Cove Key Townhomes on Lake Norman WWTP, there were several
issues with the condition of the plant and samples that needed to be addressed. The following explanations are
given to satisfy your inquiry.
-The irrigation system was malfunctioning causing the treated water to return to the head of the plant and
only partially dose the field. This caused the flow through the plant to be increased since the water was
recirculating. The drip was turned off and manually ran daily while it was being repaired. We have since
replaced all the diaphragms, valves and solenoids. It is functioning as designed now.
-The condition of the 5-day upset and wet weather ponds were also a concern. The water in the 5-day upset
pond is now being returned to the head of the plant so the sludge can be assessed, and a measurement
pole installed. The wet weather pond was being used for excess treated water while the irrigation system
was being repaired but no longer is being used. The vegetation is being cleared so the pond can be
assessed.
-The fecal sample on 6/28/23 exceeded the daily and monthly limit for the facility. We diverted to the 5-day
upset pond and discovered that the headworks was malfunctioning and increased flow which could have
lead to the high fecal result. The fecal was resampled on 7/13/23 and the result was non detectable.
-The average flow was exceeded on the 7/30/23 NDMR report. At the beginning of the month it was
discovered that the headworks was malfunctioning and recirculating through the plant. The irrigation systems
has been repaired and the flow is in normal limits.
-TKN, Nitrate, Total Nitrogen and Total Phosphorous were missing from the 7/30/23 NDMR report. They
were sampled on 6/28/23 but not reported. TKN=.76, Nitrate=18.1, Total Nitrogen= 18.9 and Total
Phosphorous=6.2. A revised report will be submitted to include these results.
Thank you,
Brian Stephens

Operator
980-339-1105 Cell
Cc: Maria Shutte — WQS MRO (email)
Brandon Long- Back up ORC (email)
Brent Bower -Cove Key (email)