NC0059200_NOVNOI2024LV0749_RESP_20240905

P.O. Box 1325 Asheville, N.C. 28802
(828)-251-1900 (828)-251-1945

September 5, 2024

Mr. Andrew Moore
North Carolina Department of
Environment and Natural Resources
Water Quality Section
2090 U.S. Highway 70
Swannanoa, NC 28778

Re: NOV-2024-LV-0749
NPDES Permit NC0059200
Trillium Links & Village LLC
Jackson County

Dear Andrew,

This letter is written on behalf of the Trillium Links & Village LLC to provide
information as to remedial action taken to the above referenced facility.

As outlined in your 8-27-24 letter, we exceeded a daily maximum for Ammonia Nitrogen
on 7/2/24, 7/9/24, 7/17/24 with a 22.7 mg/L, 50 mg/L, and 21.4 mg/L respectively over
the 15 mg/L limit. These exceedances resulted in the monthly average violation with a
23.54 mg/L over the 3 mg/L limit.

We exceeded a daily maximum for BOD on 7/17/24, 7/25/24, 7/30/24 with a 9.1 mg/L,
9.5 mg/L, and 7.6 mg/L respectively over the 7.5 mg/L daily limit. These exceedances
resulted in the monthly average violation with a 7 mg/L over the 5 mg/L limit.

We also exceeded the fecal coliform daily limit of 400 CFU/100 mL with a 470 CFU/100
mL.

Our operator noted the exceedences for BOD and Ammonia Nitrogen were due to a
unanticipated spike in MLSS along with seasonal flow increases and warmer
temperatures. We have been reduced the MLSS levels resulting in lower the Ammonia
Nitrogen and BOD levels. The fecal exceedance on 7/30/24 was most likely to a faulty
fuse on the UV disinfection system that has been replaced. These adjustments have
improved plant performance.

We suspect the membranes may have become damaged as well. We will continue to
monitor the membranes and adjust as needed to comply with permit limitations.

NOV-2024-LV-0749 9/5/24
NC0059200, Jackson County, North Carolina RPB Systems, Inc.
Page | 2

I trust you will call if you have any further questions or concerns.

Robert Barr

Robert Barr