NC0025437_More Information (Received)_20250730

109 N Main Street
P.O Box 336
Rich Square, NC 27869
May 30, 2025
Town of Rich Square
Attn: Vanessa Manuel,
Assistant Regional Supervisor
Water Resources Water Quality Regional Operations Section
NPDES Program
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Ms. Manuel:
Phone: [phone]
Fax: [phone]
Website: richsquarenc.org
RECEIVED
JUL 3 0 2025
NCDEQ/DWR/NPDES
Subject: SOC 90.Day Evaluation
EMC SOC WQ S24-002
NPDES NCO025437
Town of Rich Square
Northampton County
The Town of Rich Square holds permit NPDES NCO025437 for the operation and maintenance of
the town's wastewater treatment system. The town entered a Special Order by Consent (SOC)
with the Environmental Management Commission on March 26, 2025, to address noncompliance
issues associated with the noncompliance with permit limits.
As required by the conditions of the SOC, the Town is submitting a required 90-day treatment unit
investigation to provide the Department of Environmenta Quality and the Environmental
Management Commission of an evaluation of improvements to the treatment facility. This
information was formulated by the Wastewater Training & Technical Assistance division of the
North Carolina Rural Water Association, with the assistance of representative Richard Davis, and
is based on his visits to the facility, discussions with the staff and review of construction progress
information and a review of laboratory data.
® Solids Management Plan. Solids removal efforts were completed and measurements of
sludge depths in the lagoon made with a total of 148 dry tons of solids removed. It is
estimated that this effort resulted in the removal of 10-15% of the lagoon solids.
Measurements of the remaining lagoon depths have been made, and priority is being
determined for future sludge removal. The town is planning to review sources and methods
for fixture sludge removal and instituting a preliminary program to'address solids inventory
and removal.
Headworks Improvements: Equipment identified as part of the headworks is nearing
completion of installation and start-up and testing. Initial staff training has begun on the

equipment currently installed and will follow-up with the implementation of standard
operating procedures and related equipment maintenance service programs which will be
based on manufacturers guidance.
o Floating Aerators: Some aerators have been installed along with associated power cables.
Initial start-up testing and training has been completed along with the operations staff
involved in developing operations and maintenance procedures. Information obtained
from the equipment maintenance documents is being utilized to develop a written planned
program ensuring that documents maintenance history specific to each aerator are included
to provide for longevity and service life of the aerators. Presently, additional on -site
procedures to remove the accumulation of fibers the aerators, a major factor in service life
of the aerators is being developed to improve short term reliability and operation of the
floating aerators.
® Chemical Feed Systems and Chemical Storage. Evaluation of chemical storage tank
location is being considered along with plans to move two existing chemical tanks into
existing structures to mitigate climate effects. Strategies for developing a more constant
chemical purchase agreement are being evaluated to ensure continual chemical availability
without degradation to chemical quality. Initial training for the use of the equipment has
begun and operations staff are actively involved in adjusting chemical feed rates necessary
for adequate treatment and disinfection with flow changes. The town will partner with the
NC Rural Water Association for assistance and training in developing procedures to ensure
a strategic plan is created to address concerns related to safety, spill containment and
adequate chemical storage is attained on a continual basis.
Conclusion, this 90-day evaluation has evidenced the positive outcomes of construction planning
and operational activities needed to address deficiencies in the wastewater treatment facility.
Further completion of the current contract will provide an expected improvement to treatment
levels with a high level of confidence in meeting permitted performance. The town of Rich Square
and its staff are dedicated to making progress and improving the performance of its wastewater
treatment and protection of public health.
If you have any questions regarding this evaluation, please contact Victoria Newcombe at 252-
539-2315 (o) or 252-518-1365 (c).
Sincerely, //
Vic toriaNewclfmbeL- ,`Mayor
Town of Rich Square

July 2025
Town of Rich Square — Rich Square W WTP
EMC SOC WQ S24-002
Table 1: Event Schedule
Scheduled Activity
Completion Date
Date
(due on or before)
Completed
Treatment Unit Investigation: Written report due
No later than 90 days after SOC
May 30, 2025
effective date
Solids Management Plan: Written report due
No later than 180 days after SOC
In Process
effective date
Completion of Headworks, Floating Aerator and
No later than 180 days after SOC
In process
Chemical Feed reference materials
effective date
Bid Date — Receipt of Bids from Contractors
June 1, 2025
8/8/2024
Award Contract to Selected Contractor — Issue
July 1, 2025
9/5/2024 Award
Notice to Proceed (NTP)
1/16/2025 NTP
Mobilize and Begin Construction and Operations
Within 180 days of issuance of
1/27/2025
Notice to Proceed
Mobilization
Complete Headwork Improvements (bar screen,
mechanical bar screen, and compactor), Targeted
No later than 360 days after SOC
Sludge Removal from Lagoon, Floating Aerator
effective date
Improvements and Chemical Feed System
In Process
Improvements
Completed Contract-1 (Biosolids Removal)
January 31, 2026
3/20/25
Construction and Operations
Complete Contract-2 (W WTP Equipment
January 21, 2026
In Process
Replacement) Construction and Operations
Achieve compliance with NPDES final effluent
May 12026
In Process
limits
RECEIVED
JUL 3 0 2025
NCDEQ/DWR/NpDES

0
b 114 0akittbnt Drive, Gree0ville, NC 27858
� � Main 252.756.6208 0 fax [phone]
www.waypolntanslytical.cgin
ANALYTICAL
0D197
Town of Rich Square
Jeff Long Project 197 - Rich Square WAN
PO Box 336 Information
Rich Square, NC 27869
Report Number: 25.154.0510
REPORTOPANALYSfS
Report Date : 06/12/2025
Received : 06/03/2025
Lab No: 86473 Matrix: Aqueous
Sample ID : Influent Sampled: 6/3/2025 11,52
Test Results Units MOL DF Date/Time By Analytical
Analyzed Method
Biochemical Oxygen Demand (5-day)
Total Suspended Solids
69 mg/L 40
24.5 mg/L 12.5
1 06/03/25 11:57 1MMS 5210E-2016
1 06/04/25 08:00 ANSI 2540D-2020
Lab No: 86474 Matrix: Aqueous
Sample ID ; Effluent Sampled: 6/3/2025 11:37
Test Results Units MOL DF Date ITlme By Analytical
Analyzed Method
Ammonia Nitrogen
1r0.02
mg/L
0.02
1 06/11/2509:24
BLV
350.1
Biochemical Oxygen Demand (5-day)
�38
mg/L
8.0
1 06/03/25 15:36
IMMS
521OB-2016
Fecal Collform
;,GOOo b5
cfu/100mL
100
1 06/03/25 15:00
HMV
9222D-2015
Total Suspended Solids
39.0
mg/L
25.0
1 06/04/25 08:00
ANSI
254OD-2020
Qualifiers/ B Analyte detected In blank DF Dilution Factor
Definitions L Limit Exceeded MQL Method Quantitation Limit
Page 3 0£ 5

0. 1
114 Oakmont Drive, Greenville, NC 17858
a , iy Main 252.756.62080 Fax 252,756,0633
ANALYTICAL wwWWavpolntanalyticai.com
00197
Town of Rich Square
Jeff Long Project 197 - Rich Square WIN
PO Box 336 Information
Rich Square , NC 27869
Report Number:25-140-0504
REPORT OFAINALYSIS
Report Date : 06/01/2025
Received : 05/20/2025
Lab No: 84565
-
Matrix: Aqueous
Sample ID : Influent
Sampled: 5/20/2025 10:40-
Test
Results
Units
MQL
DF Date/Time By Analytical
Analyzed Method
Biochemical Oxygen Demand (5-day)
58
mg/L
40
1 05/21/25 10:07 HMV 5210E-2016
Total Suspended Solids
49.3
mg/L
16.6
1 05/21/25 08:00 IMMS 254OD-2020
Lab No: 84566
Matrix: Aqueous
Samp!e ID : Sffiuent
Sampled: 5/20/2025 11:12
Test
Results
Units
MQL
DF Date/Time By Analytical
Analyzed Method
Ammonia Nitrogen
4'02
mg/L
0.02
1 05/29/25 10:22 BLV 350.1
Biochemical Oxygen Demand (5-day)
—60
mg/L
60
1 05/21/2510:29 HMV 521OB-2016
Fecal Coliform
A- pp
cfu/100mL
100
1 05/20/25 14:50 AAM 9222D-2015
Total Suspended Solids
29.5
mg/L
12.5
1 05/21/25 08:00 IMMS 254OD-2020
Qualifiers/ DF Dilution Factor
Definitions MQL Method Quantitation Limit
L Limit Exceeded
Page 2 of 4

®® t a ° 114 Oakmont Drive, Greenville, NC278SS
Main 252.756.6208 *Fax [phone]
A(VALYTICALv www.waypoiManalytical.com
00197
Town of Rich Square
Jeff Long Project 197 - Rich Square WW
PO Box 336 Information
Rich Square , NC 27869
Report Date : 06/29/2025
Report Number: 25-168-0506
REPORT OFANALYSIS
Received : 06/17/2025
Lab No: 88645
Matrix: Aqueous
Sample ID : influent
Sampled: 6/17/2025 1:O:5O
Test
Results
Units
MOL
DF Date/Time By Analytical
Analyzed Method
Biochemical Oxygen Demand (S-day)
29
mg/L -
29
1 06/17/25 14:46. ANSI. 5210E-2016
Total Suspended Solids
163
mg/L
62.5
1 06/18/25 09:00 BNC 2540D-2020
Lab No : 8564E
Matrix: Aqueous
Sample ID : Effluent
Sampled: 6/17/2025 11:26
Test
Results
Units
MOL
OF Date/Time By Analytical
Analyzed Method,
Ammonia Nitrogen
X.04
mg/L
0.04
1 01/O1/00 00:00 HMM 350.1
Biochemical Oxygen Demand (5-day)
--S6
mg/L
8.0
1 06/17/25 14:46 ANSI. 5210E-2016
Fecal Coliform
,MTC b5
cru/IOOmL
100
1 06/17/25 14:55 AAM 9222D-2015
Total Suspended Solids
.I�f43
mg/L
16.6
1 06/18/25 09:00 BNC 2540D-2020
Qualifiers/ B Analyte detected in blank DF Dilution Factor
Definitions L Limit Exceeded MQL Method Quantitatlon Limit
Page 3 of 5

a
0
_ ® 214OakmontDriVe,gmenvllle,.NC27858
`int, Main 252J56,6Z08 ° Fax 252,756.0633
ANALYTICAL www.waypolntanalytieal.eom
00197
Town of Rich Square
Jeff Long Project 197- Rich Square WW
PO Box 336 Information
Rich Square, NC 27869
Report Number: 25-126.0513
REPORTOPANALYSIS
Report Date : 05/16/2025
Received : 05/06/2025
Lab No : 82286
Matrix: Aqueous
Sample ID :Influent
Sampled: 5/6/2025 10:50
Test
Results
Units
MQL
DF Date/Time By Analytical
Analyzed Method
Biochemical Oxygen Demand (5-day)
<2.0
mg/L
2.0
1 05/06/25 11:19 IMMS 521OB-2016
Total Suspended Solids
70.0
mg/L
12.5
1 05/07/25 09:00 AAM 254OD-2020
Lab No : S2287
Matra: Aqueous
Sample ID : Effluent
Sampled: 5/6/2025 11:15
Test
Results
Units
MQL
DF Date/Time By Analytical
Analyzed Method
Ammonia Nitrogen
50.02
mg/L
0.02
1 OS/07/25 13:02 BLV 350.1
Biochemical Oxygen Demand (5-day)
A9
mg/L
8.0
1 05/06/25 15:44 IMMS 5210E-2016
Fecal Coliform
w6000 b5
cfu/100mL
100
1 05/06/25 15:44 AAM 9222D-2015
Nitrate+Nitrite-N
y09
mg/L
0.04
2 05/12/2511:36 MSK 353.2
Total Suspended Solids
-n,0
mg/L
25.0
1 05/07/25 09:00 AAM 254OD-2020
Total Kjeidahl Nitrogen
_9r57
mg/L
0.50
1 05/15/25 10:26 BLV EPA-351.2
Phosphorus
�k,65
mg/L
0.05
1 09/15/25 10:26 BLV 365.4
Qualifiers/ B Analyte detected In blank
Definitions L Limit Exceeded
OF Dilution Factor
MQL , Method Quantitation Limit
Page 3 of 5

0
® 114 Oakmont Drive, Greenville, NC 27858
i©© Main 252.756.52080 Fax 252,756.0033
ANALYTICAL wwwwaypointanslytical.corn
00197
Town of Rich Square
Jeff Long Project 197 - Rich Square W W
PO Box 336 Information
Rich Square , NC 27869
Report Number:25-112-0021
REPORT OPANAL YSIS
Report Date : 04/29/2025
Received : 04/22/2025
Lab No : 80650
Matra: Aqueous
Sample ID: Influent
Sampled: 4/22/202S 10:50
Test
Results
Units
MOL
DF Date/Time By Analytical
Analyzed Method
Biochemical Oxygen Demand (5-day)
86
mg/L
40
1 04/23/25 09:51 ANSI 5210E-2016
Total Suspended Solids
60.5
mg/L
12.5
1 04/23/25 08:40 BNC 254OD-2020
Lab No: 80653
Matrix! Aqueous
Sample ID : (Effluent
Sampled: 4122/202511:20
Test
Results
Units
MOL
DF Dale/Time By Analytical
Analyzed Method
Ammonia Nitrogen
0.19
mg/L
0.02
1 04/28/25 16:05 BLV 350.1
Biochemical Oxygen Demand (5-day)
67
mg/L
20
1 04/23/25 09:51 ANSI 521OB-2016
Fecal Coliform
2100
cfu/100mL
100
1 04/22/25 15:19 AAM 9222D-2015
Total Suspended Solids
43.3
mg/L
13.8
1 04/23/25 08:40 BNC 254OD-2020
Qualifiers/ OF Dilution Factor L Limit Exceeded
Definitions MQL Method Quantitation Limit
Page 3 of 5