WQ0004270_Compliance Evaluation Inspection_20190910

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
NORTH CAROLINA
Environmental Quality
September 10, 2019
Mr. Lee Pennington via Email
Environmental and Finishing Manager
A. B. Carter, Inc.
P.O. Box 518
Gastonia, North Carolina 28052
Subject: Non -Discharge Permit Inspection
A.B. Carter — Gastonia WWTF
Wastewater Irrigation - Permit #WQ0004270
Gaston County
Dear Mr. Pennington:
Staff of the Mooresville Regional Office (MRO) conducted a compliance inspection in conjunction
with the permit renewal on September 3rd, 2019, which included facility records, wastewater
treatment, storage and irrigation sites. The MRO would like to thank you for your time during the
inspection and quick attention to Items noted during the previous (2018) inspection: Emplacement of
the lagoon water -level gauge, and adjustments to pH sampling, so analyses are now conducted within
the 15-minute requirement.
The following items were discussed while on -site and need to be addressed to meet overall program
requirements:
Pool grade chlorination tablets are insufficient for wastewater treatment. Only wastewater
treatment grade tablets of Calcium Hypochlorite, delivering 65-70% Chlorine, should be
utilized. Please consult with your tablet supplier for safety guidance on proper removal,
disposal of the pool grade tablets and replacement with the wastewater treatment grade
tablets. Per the attached documentation, it is unsafe to combine tablet types and unsafe to
expose wetted pool tablets to the air.
The analysis of Total Residual Chlorine requires NCDEQ field lab certification and approved
calibration methods. Contact information for our state lab was emailed on September 4th,
2019, but is also noted below for convenience: https://deg.nc.gov/about/divisions/water-
resou rces/water-resou rces-data/water-sciences-home-page/laboratory-certification-
branch/field-lab-certification. You may also call 919-733-3908 and speak with either Todd
Crawford (x251) or Beth Swanson (x259) for technical assistance.
In addition, the email also recommended inquiring about pH field certification, as there is a
potential with the permit renewal that pH monitoring will increase from 2x per year to at least
once per application event, concurrent with the Total Residual Chlorine requirement.
This permit is currently in the renewal process with our Central Office non -discharge permitting staff in
Raleigh. Renewal specific questions may be directed to the assigned permit writer,
Erickson. Saunders(a.ncdenr.gov
NORTH CAROHNA �
D E Q North Carolina Department of Environmental Quality I Division of Water Resources
Mooresville Regional Office 1 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
o.namremor �w.c�giuuei� /`� 704.663.1699

The inspection report should be self-explanatory; however, please contact Maria Schutte by phone
(704-235-2184) or email (maria.schutte(cDncdenr.gov) with questions.
Sincerely,
EA
DocuSigned by:
#-.� N P:"
F161F669A2D84A3...
Andrew H. Pitner, P.G., Assistant Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
Attachment: WQ0004270 Inspection Report
Texas A&M Tablet Chlorination Article
CC: Al Abedi, A. B. Carter, Vice President (email)