NC0026042_Fact Sheet_20231030

NCO026042
Fact Sheet
NPDES Permit No. NCO026042
Permit Writer/Email Contact: Gary Perlmutter, [e-mail]
Date: October 11, 2023
Division/Branch: NC Division of Water Resources/NPDES Compliance and Expedited Permitting Unit
Fact Sheet Template: Version 08Sept2016
Permitting Action:
❑X Renewal
❑ Renewal with Expansion
❑ New Discharge
❑ Modification (Fact Sheet should be tailored to mod request)
Note: A complete application should include the following:
• For New Dischargers, EPA Form 2A or 2D requirements, Engineering Alternatives Analysis, Fee
• For Existing Dischargers (POTW), EPA Form 2A, 3 effluent pollutant scans, 4 2nd species WET
tests.
• For Existing Dischargers (Non-POTW), EPA Form 2C with correct analytical requirements based
on industry category.
Complete applicable sections below. If not applicable, enter NA.
1. Basic Facility Information
Facility Information
Applicant/Facility Name:
Town of Robersonville / Robersonville WWTP
Applicant Address:
P.O. Box 487, Robersonville, NC 27871
Facility Address:
1149 Rogerson Rd, Robersonville, NC 27871
Permitted Flow:
1.8 MGD
Facility Type/Waste:
MAJOR Municipal / 100% domestic
Facility Class:
Grade IV '
Treatment Units:
Bar screen, Grit removal, Activated sludge, Secondary clarifiers,
Tertiary filters, Chlorination, Dechlorination, Sludge dewatering,
Digesters.
Pretreatment Program (Y/N)
Y, inactive (currently)
County:
Martin
Region:
Washington
Footnote.
1. The facility is classified as Grade IV despite being less than 2.5 MGD due to presence of Total Nitrogen and
Total Phosphorus limits in the current permit (15A NCAC 08G .0302).
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NC0026042
Briefly describe the proposed permitting action and facility background: The Town of Robersonville has
applied for NPDES permit renewal and submitted a renewal application dated April 21, 2021. Review of
the application found it incomplete with effluent pollutant scans (PPAs), second species test reports, sludge
management plan and chemical addendum lacking. In the cover letter to the application, the Town
acknowledged it was not aware of the 2nd species toxicity test requirement, and following contact with
Division's Aquatic Toxicology Branch, included a schedule of sampling to be conducted later in 2021in
2022. The missing documents were provided by the ORC upon request. The PPAs were sampled in May
2017, October 2019 and March 2023. The sludge management plan was received by request on 1/13/2022;
and the 2nd species test reports were received by request on 2/6/2023, sampled in May, July, August and
November 2021.
At the time of application submission, the facility served a population of —1770 residents including the
Towns of Robersonville (pop. —1325), Everetts (pop. —165), and Parmele (pop. —280). The Town
subcontracts operation of the facility as well as the collection system to Envirolink, Inc. The Town has a
pretreatment program, inactive since 2012, which the town is working to reactivate by request from the
Division (approval authority) in February 2022, citing several violations and civil penalty assessments
issued plus high levels of several parameters from indirect discharge by the industrial user Flagstone Foods
in 2021. The Town issued an Industrial User Permit (IUP) to Flagstone Foods in September 2022 in lieu of
starting its pretreatment program. Because the pretreatment program was not yet reactivated, the IUP was
found invalid by the Division, which issued a letter requiring immediate actions toward reactivating its
pretreatment program to be submitted by September 30, 2022. Most recently, the Town sent a letter dated
October 18, 2022, stating their cooperation with Flagstone Foods in creating a compliance schedule with
no scheduled date of reactivating the pretreatment program. A compliance schedule to reinstate the
pretreatment program was added as a special condition to the permit.
With the application, the City requested removal of copper limits from the permit, citing one high value to
be not representative of discharge as that occurred during a period of high flow and TSS. Copper limits are
evaluated via Reasonable Potential Analysis (RPA) of effluent data (see Section 6. WQBELs below).
Sludge management. A sludge management plan was not included with the permit renewal application but
received on 1/13/2023 by request. The City contracts with Granville Farms, Inc. for the hauling off and
land -applying Class B liquid (24% solids) biosolids under permit WQ0002897.
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NC0026042
2. Receiving Waterbody Information:
Receiving Waterbody Information
Outfalls/Receiving S/tream(s):
Outfall 001 / Flat Swamp
Stream Segment:
28-103-2a
Stream Classification
C, Sw, NSW
Drainage Area (mi2):
18
Summer 7Q 10 (cfs)
0.27
Winter 7Q10 (cfs):
0.73
Average Flow (cfs):
18
IWC (% effluent):
91%
2022 NC 303(d) listed/parameter:
None
Subject to TMDL/parameter:
Statewide Mercury TMDL
Basin/HUC:
Tar -Pamlico / 03020103
USGS Topo Quad:
Robersonville, NC
The receiving water is meeting instream criteria for Temperature, pH, Turbidity and Benthos; data are
inconclusive for DO and Fecal Coliform. The most recent Benthos sampling was in March 2011 at two
locations, one upstream and one downstream of the discharge, resulting in a Moderate rating for both.
3. Effluent Data Summary
Effluent data are summarized below for the period November 2018 through October 2022.
Table 1. Effluent Data Summary.
Parameter
Units
Average
Max
Min
Limits'
Flow
MGD
0.44
3.09
0.03
MA = 1.8
Total Monthly Flow
MG
13.38
36.00
4.91
Monitor and Report
BOD
mg/L
3.1
39.2
1.3
MA = 5.0
WA = 7.5
BOD removal
%
97.0
99.9
0.0
> 85
TSS
mg/L
5.7
144
< 2.0
MA = 30.0
WA = 45.0
TSS removal
%
94.6
99.9
18.2
> 85
NH3-N
mg/L
0.25
6.25
0.01
MA = 1.1
WA = 3.3
DO
mg/L
8.75
11.98
6.41
> 6.0
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NC0026042
Parameter
Units
Average
Max
Min
Limits'
Fecal Coliform
#/100 mL
7.0
3700
1
MA = 200/100
(geometric mean)
WA = 400/100
Total Residual
µg/L
31
49
4
DM = 192
Chlorine (TRC)
pH
SU
7.78
8.65
6.88
6.0-9.0
Temperature
°C
19.5
29.7
9.8
Monitor and Report
TKN
mg/L
1.18
12.0
0.13
Monitor and Report
NO3-N + NO2-N
mg/L
,
36.5
0.04
Monitor and Report
Total Nitrogen (TN)
mg/L
5.6
36.6
0.2
Monitor and Report
TN Load, monthly
lb/mo
502.88
1569.73
77.94
Monitor and Report
CY2018 = 2935
TN Load annual
lb/yr
CY2019 = 4051
25,671
'
CY2020 = 5114
'
CY2021 = 11,437
Total Phosphorus
mg/L
0.982
4.900
0.003
Monitor and Report
(TP)
TP Load, monthly
lb/mo
72.64
246.24
1.24
Monitor and Report
CY2018 = 196
TP Load, annual
lb/yr
CY2019 = 515
4639
CY2020 = 672
CY2021 = 1045
Total Hardness
mg/L
9.269
25.000
0.003
Monitor and Report
Total Copper 6
µg/L
10.5
27
3
MA = 13.07
DM = 17.85
Footnotes.
1. MA = Monthly Average; WA = Weekly Average; DM = Daily Maximum.
2. Compliance level = 50 µg/L
The highest annual average flow was 0.58 MGD (32% of the limit) in 2018.
4. Instream Data Summary
Instream monitoring may be required in certain situations, for example: 1) to verify model predictions when
model results for instream DO are within 1 mg/1 of instream standard at full permitted flow; 2) to verify
model predictions for outfall diffuser; 3) to provide data for future TMDL; 4) based on other instream
concerns. Instream monitoring may be conducted by the Permittee, and there are also Monitoring Coalitions
established in several basins that conduct instream sampling for the Permittee (in which case instream
monitoring is waived in the permit as long as coalition membership is maintained).
Is this facility a member of a Monitoring Coalition with waived instream monitoring (YIN): Yes.
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NCO026042
Name of Monitoring Coalition: Tar -Pamlico Basin Association (TPBA).
If applicable, summarize any instream data and what instream monitoring will beproposed for this permit
action: The current permit requires instream monitoring for Hardness, Temperature and Dissolved Oxygen
(DO). The upstream location is Long Creek at NCSR 1158 (3rd Street), and the downstream location is at
NCSR 1505 (Flat Swamp Church Rd). No water supply watershed lies downstream of the outfall. Hardness
is sampled upstream for calculation of dissolved to total metals for hardness -dependent metals, including
Copper, and is addressed in the Reasonable Potential Analysis (RPA) portion of Section 6 - Water Quality -
Based Effluent Limits (WQBEL).
Instream data were collected by the TPBA at the above locations, labeled Stations 07000000 (upstream)
and 07100000 (downstream). Data from the two locations were obtained from the Division's Coalition
Monitoring coordinator spanning November 2018 through June 2022 for review. Data were compared
against corresponding instream water quality standards and between stations as well as concurrent effluent
data for assessment of effluent impacts. Averages were compared using Student's t-tests with levels of
significant differences set atp = 0.05. Summary data are in Table 2.
Table 2. Instream monitoring averages and ranges (in parentheses) of permit -required (in bold) and
additional parameters monitored by TPBA. *Statistically different from Upstream.
Parameter
Upstream
Downstream
Standard
07000000
07100000
Dissolved Oxygen (DO), mg/L
Avg = 5.5
Avg = 5.8
DA = 5.0
(1.2-11.9)
(1.2-11.6)
Instant = 4.0
Temperature, o C
Avg = 18.3
Avg = 18.7
DM = 32.0
(4.7-26.1)
(4.8-27.4)
Total Hardness, mg/L
Avg — 48
(28-80)
NA
Fecal Coliform, cfu/100 mL
Geomean = 272
Geomean = 256
MG = 200
(27-8900)
(23-6000)
DM = 400
Specific Conductance, µS/cm
Avg = 156
Avg = 279*
(64-281)
(50-795)
pH, SU
Avg = 6.2
Avg = 6.6*
6.0-9.0
(5.2-6.9)
(5.4-7.5)
Ammonia -nitrogen (NH3-N), mg/L
Avg = 0.19
Avg = 0.20
(0.02-1.02)
(0.02-0.89)
Inorganic Nitrogen (NO3+NO2), mg/L
Avg = 0.68
Avg = 1.11 *
(0.02-2.01)
(0.02-6.53)
Kjeldahl Nitrogen (TKN), mg/L
Avg = 1.22
Avg = 1.19
(0.50-5.81)
(0.56-4.78)
Phosphorus, mg/L
Avg = 0.12
Avg = 0.32*
(0.02-0.43)
(0.02-3.19)
Turbidity, NTU
Avg = 10.5
Avg = 10.3 *
50
(5-23)
(3-60)
1. DA = Daily Average; DM = Daily Maximum; MG = Monthly Geometric Mean.
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NCO026042
Dissolved Oxygen (DO) — Instream DO remains in the permit as a parameter of concern for aquatic life.
The receiving stream is rated as Data Inconclusive in the 2022 Integrated Report. Reviewed instream DMR
data revealed summer lows to be consistently below the stream standard of 5.0 mg/L at both locations and
is considered naturally occurring in this swamp water (Fig. 1). No statistically significant differences were
detected between the two station DO averages. Concurrent effluent DO data were considerably higher on
average with no values below 6 mg/L.
Dissolved Oxygen
Upstream — — — ❑nstream Standard
1L
12
10
! ► r % ►
E 5 1 ti! ►
4
2 f ►
0
�oy�,�'�,,�oya�,,3o'�oyo,lb\T �h,Totio,�h',",Toyti,�o,,�o',y�,T1,\T
ti ti ti� � � ti� � �
Figure 1. Flat Swamp Instream Dissolved Oxygen (DO) values from November 2018 — June 2022.
Temperature - Instream Temperature remains in the permit as a parameter of concern for aquatic life. The
receiving stream is meeting criteria in the 2022 Integrated Report. Temperatures in all sites were below the
standard of 32 °C for lower piedmont and coastal plain waters. No statistically significant differences were
detected between the two station temperature averages. There was one occurrence where the downstream
temperature exceeded the water quality standard of 2.8 °C above the natural water temperature when
compared to upstream data, on December 13, 2021. Concurrent effluent temperatures were higher on
average with winter lows substantially higher than those instream.
Fecal Coliform — Fecal Coliform instream monitoring was removed from the permit in 2005. The receiving
stream is neither a Class B nor impaired for Fecal Coliform, meeting the criteria for its removal per the
Division's instream monitoring guidance document (DWQ 2002). Reviewed monitoring coalition data
found the downstream geometric mean to be lower than that upstream, and the geometric mean of
concurrent effluent data was considerably lower than either instream geometric mean, indicating no impact
from the effluent. Therefore, instream monitoring for Fecal Coliform is not required and was not added to
the permit.
Conductivity — Conductivity instream monitoring was removed from the permit in 2005, based on the
facility discharging 100% domestic waste. Reviewed monitoring coalition data found statistically
significant differences between sites with the downstream average higher than the upstream average.
Effluent conductivity data are not available as this parameter is not in the permit. The facility does receive
industrial waste despite its pretreatment program not being yet reactivated. Effluent and instream
conductivity monitoring was added to the permit.
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NCO026042
pH and Turbidity — Although not required, the TBPA monitored instream pH and Turbidity, two parameters
that have instream water quality standards. The receiving stream meets criteria for both in the 2022
Integrated Report. The instream data were reviewed, finding significant differences between the upstream
and downstream averages for each parameter, but not exceeding their respective stream standards. Instream
monitoring for pH and Turbidity is not required and was not added to the permit.
Nutrient parameters — The TBPA monitors instream Ammonia -nitrogen (NH3-N), Inorganic Nitrogen
(NO3+NO2), Total Kjeldahl Nitrogen (TKN), and Phosphorus, parameters that are not permit -required.
These parameters were not assessed in the 2022 Integrated Report despite the receiving stream being
classified as a nutrient -sensitive water. Review of the instream data found significant differences for
Inorganic Nitrogen and Phosphorus with downstream averages higher for both.
5. Compliance Summary
Summarize the compliance record with permit effluent limits (past 5 years): From December 2017 through
November 2022 the facility had reported exceedences in BOD, Fecal Coliform, Total Copper, Ammonia,
and TSS, resulting in various enforcement actions (see Table 3).
Table 3. Effluent monitoring violations summary, December 2017-November 2022.
Weekly
Monthly
Daily
Notices of
Notices of
Enforcement
Parameter
Average
Average
Maximum
Deficiency
Violations
Cases
Exceedences
Exceedences
Exceedences
BOD
5
1
NA
4
1
0
Fecal Coliform
C
NA
Total Copper
8
NA
8
2
5
9
Ammonia
1
2
NA
2
1
0
TSS
1
0
NA
1
0
0
Summarize the compliance record with aquatic toxicity test limits and any second species test results (past
5 years): The facility passed 18 of 19 quarterly chronic toxicity tests, with one failure followed by two
successive passing tests, as well as all 4 second species chronic toxicity tests. Second species tests were
sampled in May, July, August, and November 2021.
Summarize the results from the most recent compliance inspection: The most recent facility inspection,
conducted on 2/8/2022, reported numerous reporting, equipment and operating issues, and found the facility
to be out of compliance with its permit. Issues noted include an annual report with errors, grease observed
in the influent mixing with grit, the "equalization basin" with excessive floating solids and vegetation, and
clarifiers needing repairs. During this inspection a split whole effluent toxicity sample was taken; results
passed for both samples.
A subsequent inspection report, dated 8/8/2022, focused on pretreatment issues, including review of
Flagstone Foods (industrial user) sample results. Data showed high values in BOD, COD, Oil & Grease,
solids, metals and nutrient parameters. The report concluded with a current status of correspondence
regarding re -instating the pretreatment program.
A follow-up inspection occurred on 9/l/2022. The report noted staff changes and that the City needs to
designate an ORC and backup ORC. Most issues noted in the 2/8/2022 inspection were corrected.
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NC0026042
6. Water Quality -Based Effluent Limitations (WQBELs)
Dilution and Mixin Zones
ones
In accordance with 15A NCAC 213.0206, the following streamflows are used for dilution considerations
for development of WQBELs: 1 Q 10 streamflow (acute Aquatic Life); 7Q 10 streamflow (chronic Aquatic
Life; non -carcinogen HH); 30Q2 streamflow (aesthetics); annual average flow (carcinogen, HH).
If applicable, describe any other dilution factors considered (e.g., based on CORMIX model results): NA
If applicable, describe any mixing zones established in accordance with 15A NCAC 2B. 0204(b): NA
Oxygen -Consuming Waste Limitations
Limitations for oxygen -consuming waste (e.g., BOD) are generally based on water quality modeling to
ensure protection of the instream dissolved oxygen (DO) water quality standard. Secondary TBEL limits
(e.g., BOD = 30 mg/L for Municipals) may be appropriate if deemed more stringent based on dilution and
model results.
If permit limits are more stringent than TBELs, describe how limits were developed: Limitations for BOD
are based on a Wasteload Allocation (WLA) first conducted in 1981 for a flow of 1.2 MGD, verified by
Streeter Phelps (Level B) models run in 1983 and 1985, and held for the expansion to its current permitted
flow of 1.8 MGD in 1988 again based on a WLA run that year. The current weekly average limit was
introduced in the 2000 permit. No changes were made.
Ammonia and Total Residual Chlorine Limitations
Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of
1.0 mg/L (summer) and 1.8 mg/L (winter). Acute ammonia limits are derived from chronic criteria, utilizing
a multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non -Municipals.
Limitations for Total Residual Chlorine (TRC) are based on the NC water quality standard for protection
of aquatic life (17 µg/L) and capped at 28 µg/L (acute impacts). Due to analytical issues, all TRC values
reported below 50 µg/L are considered compliant with their permit limit.
Describe any proposed changes to ammonia and/or TRC limits for this permit renewal: The current permit
year-round Ammonia limits are based on WLA to protect against ammonia toxicity, set in 2017. Another
WLA was run for this permit renewal, using a design flow of 1.8 MGD, and low streamflows of 0.27 cfs
7Q 10 in summer and 0.73 cfs 7Q 10 in winter. The resulting Ammonia allowable concentrations in summer
are as stringent and those in winter are less stringent than the current permit limits. The WLA also resulted
in a TRC allowable concentration as stringent as the current permit limit. No changes were made for either
parameter.
Reasonable Potential Analysis (RPA) for Toxicants
If applicable, conduct RPA analysis and complete information below.
The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality
standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent
effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC
RPA procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero
background; 3) use of '/2 detection limit for "less than" values; and 4) streamflows used for dilution
consideration based on 15A NCAC 213.0206. Effective April 6, 2016, NC began implementation of
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NC0026042
dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of
Instream Dissolved Metals Standards, dated June 10, 2016.
Effluent and instream (upstream) Hardness monitoring is required in the current permit. Permittee-
submitted DMR Hardness data were used in the RPA for hardness -dependent metals.
A reasonable potential analysis was conducted on effluent toxicant data collected between November 2018
through October 2022 plus the three effluent pollutant scans. Pollutants of concern included toxicants with
positive detections and associated water quality standards/criteria. Based on this analysis, the following
permitting actions are proposed for this permit:
• Effluent Limit with Monitoring. The following parameters will receive a water quality -based
effluent limit (WQBEL) since they demonstrated a reasonable potential to exceed applicable water
quality standards/criteria:
o Total Copper — MA = 9.8 µg/L; DM = 13.0 µg/L
• Monitoring Only. The following parameters will receive a monitor -only requirement since they
did not demonstrate reasonable potential to exceed applicable water quality standards/criteria, but
the maximum predicted concentration was > 50% of the allowable concentration: Total Lead.
• No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since
they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria
and the maximum predicted concentration was < 50% of the allowable concentration: Arsenic,
Beryllium, Cadmium, Total Phenolic Compounds, Total Chromium, Cyanide, Nickel, Selenium,
Silver and Zinc.
POTW Effluent Pollutant Scan Review: Three effluent pollutant scans were evaluated for
additional pollutants of concern. Samples for the pollutant scans were collected on 5/25/2017,
11/20/2019, and 3/28/2023. Only Chloroform and Dichlorobromomethane were detected, both at
levels below their respective allowable concentrations.
o The following parameter(s) will receive a water quality -based effluent limit (WQBEL)
with monitoring, since as part of a limited data set, two samples exceeded the allowable
discharge concentration: None.
o The following parameter(s) will receive a monitor -only requirement, since as part of a
limited data set, one sample exceeded the allowable discharge concentration: None.
If applicable, attach a spreadsheet of the RPA results as well as a copy of the Dissolved Metals
Implementation Fact Sheet for freshwater/saltwater to this Fact Sheet. Include a printout of the RPA
Dissolved to Total Metal Calculator sheet if this is a Municipality with a Pretreatment Program.
Toxici , Testing Limitations
Permit limits and monitoring requirements for Whole Effluent Toxicity (WET) have been established in
accordance with Division guidance (per WET Memo, 8/2/1999). Per WET guidance, all NPDES permits
issued to Major facilities or any facility discharging "complex" wastewater (contains anything other than
domestic waste) will contain appropriate WET limits and monitoring requirements, with several exceptions.
The State has received prior EPA approval to use an Alternative WET Test Procedure in NPDES permits,
using single concentration screening tests, with multiple dilution follow-up upon a test failure.
Describe proposed toxicity test requirement: This is a Major POTW, and a chronic WET limit at 90%
effluent will continue on a quarterly frequency.
Mercury Statewide TMDL Evaluation
There is a statewide TMDL for mercury approved by EPA in 2012. The TMDL target was to comply with
EPA's mercury fish tissue criteria (0.3 mg/kg) for human health protection. The TMDL established a
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NC0026042
wasteload allocation for point sources of 37 kg/year (81 lb/year), and is applicable to municipals and
industrial facilities with known mercury discharges. Given the small contribution of mercury from point
sources (-2% of total load), the TMDL emphasizes mercury minimization plans (MMPs) for point source
control. Municipal facilities > 2 MGD and discharging quantifiable levels of mercury (> 1 ng/L) will receive
an MMP requirement. Industrials are evaluated on a case -by -case basis, depending if mercury is a pollutant
of concern. Effluent limits may also be added if annual average effluent concentrations exceed the WQBEL
value (based on the NC WQS of 12 ng/L) and/or if any individual value exceeds a TBEL value of 47 ng/L.
Describe proposed permit actions based on mercury evaluation: The current permit requires mercury to
be monitored via the three effluent pollutant scans. Because no annual average was above the TBEL nor
any individual result was greater than the WQBEL (see Table 4), no limits are required. Because the facility
is < 2 MGD, a Mercury Minimization Plan is not required. No changes were made for Mercury.
Table 4. Mercury Effluent Data Summary
2015
2016
# of Samples
10
8 2
1 1
Annual Average Conc. ng/L
1.0
0.7 0.5
2.1 1.1
Maximum Conc., ng/L
2.00
1.40 0.50
2.13 1.07
TBEL, ng/L
47
WQBEL, ng/L
13.2
Other TMDL/Nutrient Management Strategy Considerations
If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation within
this permit: The facility discharges into a nutrient sensitive water (NSW), classified for the Tar -Pamlico
Basin in 1989. The current permit has weekly concentration monitoring, monthly load monitoring and
annual load limits for Total Nitrogen (TN) and Total Phosphorus (TP). The concentration monitoring
includes TN components Total Kjeldahl Nitrogen (TKN) and Nitrate -Nitrite (NO3+NO2). The permit has
special conditions for TN & TP load calculation [A. (3.)]; annual limits in recognition of the Permittee also
being a Co-Permittee in the Tar -Pamlico Basin Association group permit (NCC000002) [A. (4.)]; and
nutrient allocations on which the limits are based upon [A. (5.)]. All these requirements and conditions were
added to the current permit in 2017. The current group permit, issued on 12/16/2020, lists the allocation for
Robersonville as the same as the current permit limits. No changes were made.
Other WQBEL Considerations- Permit Limit Development
The current total chromium limitations were maintained in the interim effluent sheet until hexavalent
chromium levels can be assessed. The reasonable potential analysis using the city's total chromium effluent
data showed reasonable potential to violate the new hexavalent chromium standard. As a result, hexavalent
chromium limitations were added to this permit. Sampling for hexavalent chromium will ascertain if
hexavalent chromium is present in the total chromium samples and thus the effluent.
If applicable, describe any other parameters of concern evaluated for WQBELs: A Chemical Addendum
was submitted upon request on 3/15/2023 with a note that no additional parameters were expected and the
facility is not monitoring for PFAS. The outfall discharges into a Class C, Sw, NSW waterbody with no
downstream water supply waters before the Pamlico Sound and Atlantic Ocean.
To determine whether PFAS chemicals are in the waste stream and in accordance with EPA memo
addressing PFAS discharges in NPDES permits (EPA 12/5/2022), monitoring for PFAS chemicals were
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added to the permit at a quarterly frequency. Since an EPA method for sampling and analyzing PFAS in
wastewater is not currently available, the PFAS sampling requirement in the Permit will include a delayed
implementation until the first full calendar quarter beginning 6 months after EPA has a final wastewater
method in 40 CFR 136 published in the Federal Register, to allow testing laboratories to become certified
in the new method. This date may be extended upon request and if there are no NC -certified labs.
If applicable, describe any compliance schedules proposed for this permit renewal in accordance with 15A
NCAC 2H.0107(c)(2)(B), 40CFR 122.47, and EPA May 2007 Memo: YES. An 18-month compliance
schedule for the Town to activate its pretreatment program was added to the permit. A 3-year compliance
schedule with a WER study option was added for Total Copper per ORC request.
If applicable, describe any water quality standards variances proposed in accordance with NCGS 143-
215.3(e) and 15A NCAC 2B.0226 for this permit renewal: NA
7. Technology -Based Effluent Limitations (TBELs)
Municipals (if not applicable, delete and skip to Industrials)
Are concentration limits in the permit at least as stringent as secondary treatment requirements (30 mg1L
BOD51TSS for Monthly Average, and 45 mg/L for BODS/TSS for Weekly Average). YES
If NO, provide a justification for alternative limitations (e.g., waste stabilization pond). NA
Are 85% removal requirements for BOD51TSS included in the permit? YES. Reviewed data found 23
monthly occurrences below 85% BOD removal and 63 occurrences below 85% TSS removal from
November 2018 — October 2022.
If NO, provide a justification (e.g., waste stabilization pond). NA
8. Antidegradation Review (New/Expanding Discharge):
The objective of an antidegradation review is to ensure that a new or increased pollutant loading will not
degrade water quality. Permitting actions for new or expanding discharges require an antidegradation
review in accordance with 15A NCAC 213.0201. Each applicant for a new/expanding NPDES permit must
document an effort to consider non -discharge alternatives per 15A NCAC 2H.0105(c)(2). In all cases,
existing instream water uses and the level of water quality necessary to protect the existing use is maintained
and protected.
If applicable, describe the results of the antidegradation review, including the Engineering Alternatives
Analysis (EAA) and any water quality modeling results: NA
9. Antibacksliding Review:
Sections 402(o)(2) and 303(d)(4) of the CWA and federal regulations at 40 CFR 122.44(1) prohibit
backsliding of effluent limitations in NPDES permits. These provisions require effluent limitations in a
reissued permit to be as stringent as those in the previous permit, with some exceptions where limitations
may be relaxed (e.g., based on new information, increases in production may warrant less stringent TBEL
limits, or WQBELs may be less stringent based on updated RPA or dilution).
Page 11 of 16

NC0026042
Are any effluent limitations less stringent than previous permit (YES/NO): NO.
If YES, confirm that antibacksliding provisions are not violated: NA.
10. Monitoring Requirements
Monitoring frequencies for NPDES permitting are established in accordance with the following regulations
and guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 2B.0500; 2) NPDES
Guidance, Monitoring Frequency for Toxic Substances (7/15/2010 Memo); 3) NPDES Guidance, Reduced
Monitoring Frequencies for Facilities with Superior Compliance (10/22/2012 Memo); 4) Best Professional
Judgement (BPJ). Per US EPA (Interim Guidance, 1996), monitoring requirements are not considered
effluent limitations under Section 402(o) of the Clean Water Act, and therefore anti -backsliding
prohibitions would not be triggered by reductions in monitoring frequencies.
No effluent parameters are sampled at reduced monitoring frequencies. The Permittee requested reduced
monitoring for BOD, TSS, Ammonia and Fecal Coliform on 4/17/2023. Review of effluent data from the
past three years (November 2019 through October 2022) found all above parameters to meet numeric
criteria. However, due to the facility's failure to properly restart their pretreatment program, the
enforcement action for the Fecal Coliform violation in August 2022, and findings of noncompliance and
operation issues during inspection visits in 2022, no reduced monitoring will be granted for the above
parameters despite the data meeting numeric criteria. The Division's Central Office and Washington
Regional Office concur with this assessment.
For instream monitoring, refer to Section 4.
11. Electronic Reporting Requirements
The US EPA NPDES Electronic Reporting Rule was finalized on December 21, 2015. Effective December
21, 2016, NPDES regulated facilities are required to submit Discharge Monitoring Reports (DMRs)
electronically. Effective December 21, 2020, NPDES regulated facilities will be required to submit
additional NPDES reports electronically. This permit contains the requirements for electronic reporting,
consistent with Federal requirements.
12. Summary of Proposed Permitting Actions:
Current permit conditions and proposed changes are presented in Table 5.
Table 5. Current Permit Conditions and Proposed Changes.
Parameter
Current Permit
Proposed Change'
Basis for Condition/Change
Flow
MA = 1.8 MGD
Monitor continuously
No change
15A NCAC 213.0505
Total Monthly
Monitor monthly
No change
To aid calculating monthly nutrient
Flow
(TN, TP) loads.
Page 12 of 16

NC0026042
Parameter
Current Permit
Proposed Change'
Basis for Condition/Change
MA = 5.0 mg/L
WQBEL. Based on 1985 Level B
BOD5
WA = 7.5 mg/L
No change
model and protection of DO
Monthly daily
standard. 15A NCAC 2B .0200,
.0500.
MA = 30 mg/L
TBEL. Secondary treatment
TSS
WA = 45 mg/L
No change
standards / 40 CFR 133 / 15A
Monitor daily
NCAC 2B .0406, .0500.
MA = 1.1 mg/L
WQBEL. WLA results, for
NH3-N
WA = 3.3 mg/L
No change
protection from toxicity. 15A NCAC
Monitor daily
2B .0500.
DA > 6.0 mg/L
WQBEL. 15A NCAC 213.0200.
DO
No change
Based on 1985 Level B model and
Monitor daily
protection of DO standard. 15A
NCAC 2B .0500.
Fecal Coliform
MA = 200 A00 mL
WA = 400 /100 mL
No change
WQBEL. 15A NCAC 213.0200,
Monitor daily
0500.
pH
Between 6 and 9 SU
No change
WQBEL. 15A NCAC 2B .0200,
Monitor daily
.0500.
TRC
DM = 19 µg/L.
No change
WQBEL. 15A NCAC 213.0200,
Monitor daily
.0500; WLA results
Temperature
Monitor daily
No change
15A NCAC 213.0500
Tar -Pamlico TMDL (1995) and
TKN
Monitor weekly
No change
Nutrient Management Strategy
(Phase IV, 2015)
Tar -Pamlico TMDL (1995) and
TKN
Monitor weekly
No change
Nutrient Management Strategy
(Phase IV, 2015)
Tar -Pamlico TMDL (1995) and
NO3-N + NO2-N
Monitor weekly
No change
Nutrient Management Strategy
(Phase IV, 2015)
Total Nitrogen
Tar -Pamlico TMDL (1995) and
(TN)
Monitor weekly
No change
Nutrient Management Strategy
(Phase IV, 2015)
25,671 lb/yr
Tar -Pamlico TMDL (1995) and
TN Load
Monitor monthly
No change
Nutrient Management Strategy
(lb/mo)
(Phase IV, 2015)
Total Phosphorus
Tar -Pamlico TMDL (1995) and
(TP)
Monitor weekly
No change
Nutrient Management Strategy
(Phase IV, 2015)
Page 13 of 16

NC0026042
Parameter
Current Permit'
Proposed Change
Basis for Condition/Change
4639 lb/yr
Tar -Pamlico TMDL (1995) and
TP Load
Monitor monthly
No change
Nutrient Management Strategy
(lb/mo)
(Phase IV, 2015)
Add daily effluent
15A NCAC 213 .0500; facility
Conductivity
No requirement
monitoring and
receives industrial wastewater.
instream monitoring
Monitor effluent and
Revised WQS and EPA's guidelines
Total Hardness
instream (upstream)
No change
on hardness -dependent metals.
quarterly
MA = 9.8 µg/L
MA = 13.07 µg/L
DM = 13.0 µg/L
Add 3-yr compliance
WQBEL. 15A NCAC 213 .0200. RP
Total Copper
DM = 17.85 µg/L
schedule with WER
found, using updated Hardness data.
study option.
Compliance schedule requested by
Monitor monthly
No change in
ORC.
monitoring frequency.
Total Lead
No requirement
Add quarterly
RPA resulted in max pred value >
monitoring
50 /o
Chronic Toxicity
Chronic limit, 90%
WQBEL. No toxics in toxic
Test
effluent
No change
amounts. 15A NCAC 213 .0200,
Monitor quarterly
.0500
PFAS
No requirement
Add quarterly
monitoring with
EPA Guidance Memo re: PFAS in
delayed implementation
NPDES, 12/5/2022
Effluent Pollutant
Three times per permit
Update sample years:
40 CFR 122
Scan
cycle
2025, 2026, 2027.
Pretreatment
No requirement
Add compliance
Exceedances of parameters linked to
Program
schedule to reactivate
industrial users.
Electronic
Special condition
Update special
In accordance with EPA Electronic
Reporting
condition
Reporting Rule 2015.
Footnote.
1. MGD = million gallons per day, MA = monthly average, WA = weekly average, DM = daily maximum.
13. Public Notice Schedule:
Permit to Public Notice: 04/25/2023 (to wrong newspaper), 07/15/2023, 09/11/2023
Per 15A NCAC 2H .0109 & .0111, The Division will receive comments for a period of 30 days following
the publication date of the public notice. Any request for a public hearing shall be submitted to the Director
within the 30-day comment period indicating the interest of the party filing such request and the reasons
why a hearing is warranted.
Page 14of16

NC0026042
14. NPDES Division Contact:
If you have any questions regarding any of the above information or on the attached permit, please contact
Gary Perlmutter at [phone] or via email at [e-mail].
14. Fact Sheet Addendum (if applicable):
Were there any changes made since the Draft Permit was public noticed (Yes/No): YES. Comments were
received from Envirolink (contract operator), with two questions/concerns, regarding PFAS monitoring and
Total Copper revised limits. The PFAS questions were answered, explaining the delayed implementation
in addressing lab -certification requirements and the current uncertainty of an approved method and water
quality standards. A compliance schedule with WER option was offered to address the concern of the
revised Copper limits to which the ORC requested. See the Fact Sheet Addendum for more information.
No comments were received from the EPA, Division's regional office or any other party. With the
compliance schedule, the draft was sent for a second public notice.
No comments were received for the second public notice from any party.
If Yes, list changes and their basis below:
• A three-year compliance schedule with a WER study option was added for the Copper limits per
ORC request.
• The PFAS special condition was updated to reflect the EPA 4th Draft Method 1633, released in July
2023.
• E-mail addresses were updated to reflect the change in domain name to @deq.nc.gov.
• Updated Effluent Pollutant Scan sampling years.
• Updated map to show instream sampling locations.
15. Fact Sheet Attachments (if applicable):
• 2022 Integrated Report, p. 951
• Benthos Site Details pages for stations OB 171 (upstream) and OB 121 (downstream)
• Effluent Pollutant Scan reports
• 2"d species WET test reports
• Monitoring Report Violations report
• WET Testing Summary, page 92
• Compliance Evaluation Inspection reports, 2/8/2022, 8/8/2022, 9/l/2022
• Waste load allocations for TRC and NH3-N
• RPA Spreadsheet Summaries and dissolved to total metal calculator
• Dissolved Metals Implementation/Freshwater
• Mercury monitoring lab reports
• Mercury WQBEL/TBEL evaluation
• Chemical Addendum
• EPA memo addressing PFAS discharges in NPDES permits and through the pretreatment
program and monitoring programs (EPA 12/5/2022)
• Letter from City requesting monitoring frequency reduction
• Monitoring reduction spreadsheet
• Fact Sheet Addendum
Page 15 of 16

NCO026042
Page 16 of 16

NORTH CAROLINA 2022 INTEGRATED REPORT
Lower Tar Tar -Pamlico River Basin
AU Name AU Number Classification
AU ID Description
Flat Swamp 28-103-2a C;Sw,NSW
9175, ,From source to 1.5 miles downstream of Robersonville WWTP discharge
2022 Water Quality Assessments '
PARAMETER
Water Temperature (329C, AL, LP&CP)
pH (4.3 su, AL, Sw)
pH (9.0, AL, FW)
Turbidity (50 NTU, AL, FW miles)
Benthos (Nar, AL, FW)
Fecal Coliform (GM 200/400, REC, FW)
Dissolved Oxygen (NA, AL, swamp)
1
1
3a
3a
AU LengthArea AU Units
Flat Swamp 28-103-2b C;Sw,NSW
9176 From 1.5 miles downstream of Robersonville WWTP discharge to Tranters Creek
2022 Water Quality Assessments
PARAMETER IR CATEGORY
Dissolved Oxygen (4 mg/I, AL, FW) 3a
Water Temperature (329C, AL, LP&CP) 1
pH (4.3 su, AL, Sw) 1
pH (9.0, AL, FW) 1
Turbidity (50 NTU, AL, FW miles) 1
Benthos (Nar, AL, FW) 1
Fecal Coliform (GM 200/400, REC, FW) 3a
Briery Swamp (Shepherd Millpond) 28-103-8 C;Sw,NSW
9183 From source to Tranters Creek
2022 Water Quality Assessments
PARAMETER IR CATEGORY
Benthos (Nar, AL, FW) 1
8.1 FW Miles
CRITERIA STATUS
Meeting Criteria
Meeting Criteria
Meeting Criteria
Meeting Criteria
Meeting Criteria
Data Inconclusive
Data Inconclusive
1.5 FW Miles
CRITERIA STATUS
Data Inconclusive
Meeting Criteria
Meeting Criteria
Meeting Criteria
Meeting Criteria
Meeting Criteria
Data Inconclusive
10.4 FW Miles
CRITERIA STATUS
Meeting Criteria
6/7/2022 NC 2022 INTEGRATED REPORT -Category 5 Approved by EPA 4/30/2022 Page 951 of 1346

12/12/22, 9:33 AM
NCDEQ-DWR ::
Benthos Site Details
NC Division of Water Resources
Benthos Site Details
i
Waterbody Location
Station ID
FLAT SWP SR 1159
OB171
County
8 digit HUC Latitude
Longitude
Martin
03020103 35.815774
77.264294
Level IV Ecoregion
Drainage Area (mil)
Stream Width (m)
Mid -Atlantic Flatwoods 16.7
7.0
Date Bioclassification
14 Mar 2011 Moderate
Elevation (ft)
47
Stream Depth (m)
0.5
Landuse Percentages
Forest Developed Impervious Cultivation Grass / Shrub Wetland Water Barren
25.0 8.5 1.5 35.4 6.3/12.2 12.5 0.2 0.0
Water Quality Parameters 2011
Temperature (°C) 12.8
Dissolved Oxygen(ni 4.6
Specific Conductance (pS/cm) 123.0
pH (s.u.) 6.4
Substrate Percentages 2011
Boulder 0
Cobble 0
Gravel 0
Sand 90
Silt 10
Other
Habitat Assessment Scores (max score) 64
LWater Clarity Clear
Sample Date Sample ID Method ST EPT BI
14 Mar 2011 11150 Swamp 52 4 7.82
DEQ Division of Water Resources • 1611 Mail Service Center • Raleigh, NC 27699-1611 • Phone'. 919-707-9000 • Fax [phone]
NCDEQ • NCgov • © 2022 NC DEQ Division of Water Resources
EPT BI Bioclassification
6A7 Moderate
https://www.ncwater.org/?page=672&SitelD=OB171 1/1

12/12/22, 9:34 AM
NCDEQ-DWR :: Benthos Site Details
NC Division of Water Resources
Benthos Site Details
Waterbody
Location
Station ID
FLAT SWP
SR 1157
OB121
County
8 digit HUC Latitude
Longitude
Martin
03020103 35.781667
77.256944
Level IV Ecoregion
Drainage Area (mil) —
Stream Width (m) —
Mid -Atlantic Flatwoods
21.4
6.0
Landuse Percentages
Forest
Developed Impervious
Cultivation
Grass / Shrub
Wetland
21.6
9.5 1.9 38.5
5.8/11.0
13.4
Water Quality Parameters
2011
2007
2002
Temperature (°C)
12.2
7.5
13.0
Dissolved Oxygen(mg/L)
4.8
11.0
8.5
Specific Conductance (pS/cm)
152.3
161.0 282.0
pH (s.u.)
0.0
6.1 7.2
Sample Date
14 Mar 2011
13 Feb 2007
12 Mar 2002
Date Bioclassification
14 Mar 2011 Moderate
Elevation (ft)
35
I
Stream Depth (m)
0.4
Water Barren
0.1 0.0
Substrate Percentages
2011
2007
2002
Boulder
0
0
0
Cobble
0
0
0
Gravel
0
0
0
Sand
90
10
60
Silt
10
90
30
Other
Assessment Scores (max score)
62
LHabitat
LWater Clarity
Clear
Sample ID
Method ST
EPT
BI
EPT BI Bioclassification
11149
Swamp 60
2
7.55
6.75 Moderate
10125
Swamp 53
2
7.37
6.70 Moderate
8702
Swamp 49
1
7.84
6.60 Moderate
DEQ_ Division of Water Resources • 1611 Mall Service Center • Raleigh, NC 27699-1611 • Phone'. 919-707-9000 • Fax [phone]
NCDEQ • NCgov • © 2022 NC DEQ Division of Water Resources
https://www.ncwater.org/?page=672&SitelD=OB121 1/1

Environment 1.. Incor
P.O. BOX 7085, 114 OAKMONT DRIVE
GREENVILLE, N.C. 27835-7085
TOWN OF ROBERSONVILLE WWTP
C/O ENVIROLINK
P.O. BOX 670
BAILEY ,NC 27807
Effluent
Analysis
Method
PARAMETERS
Date Analyst
Code
Ammonia Nitrogen as N, mg/t
0.80
06/05/17
AKS
350.1 R2-93
Total Kjeldahl Nitrogen as N,mg/l
1.33
06/01/17
AKS
351.2 R2-93
Nitrate -Nitrite as N, mg/1
0.17
05/26/17
AKS
353.2 R2-93
Total Phosphorus as P, mg/t
0.10
06/01/17
CML
365.4-74
Oil & Grease (HEM), mg/1
< 6
05/26/17
SEJ
1664B
Phenol, ug/l
< 5
06/05/17
SEJ
420.1-78
Total Cyanide, mg/t
< 0.005
06/06/17
SEJ
450OCNE-99
Total Hardness, mg/1
78
05/30/17
SDB
2340C-97
Total Dissolved Residue, mg/t
290
05/31/17
KKM
2540C-97
Antimony, ug/l
< 3.0
06/12/17
LFJ
EPA200.8
Arsenic, ug/l
< 5.0
06/05/17
MTM
3113B-04
Beryllium, ug/l
< 1.0
06/05/17
LFJ
EPA200.7
Cadmium, ug/l
< 1
06/02/17
MTM
311313-04
Total Chromium, ug/l
< 5.0
06/05/17
LFJ
EPA200.7
Copper, ug/l
< 10
06/05/17
LFJ
EPA200.7
Lead, ug/l
< 5.0
05/31/17
MTM
311313-04
Nickel, ug/l
< 10
06/05/17
LFJ
EPA200.7
Selenium, ug/l
< 10
06/01/17
MTM
3113B-04
Silver, ug/l
< 5.0
06/05/17
LFJ
EPA200.7
Thallium, ug/l
< 1.0
06/12/17
LFJ
EPA200.8
Zinc, ug/l
28
06/05/17
LFJ
EPA200.7
PHONE [phone]
FAX [phone]
ID#: 133 F
DATE COLLECTED: 05/25/17
DATE REPORTED : 06/21/17

P.O. BOX 7085, 114 OAKMONT DRIVE PHONE [phone]
GREENVILLE, N.C. 27835-7085 FAX [phone]
CLIENT: TOWN OF ROBERSONVILLE WWTP
C/O ENVIROLINK
P.O. BOX 670
BAILE , NC 27807
REVIEWED 3
VOLATILE ORGANICS
EPA METHOD 624
CLIENT ID: 133 F
ANALYST: MAO
DATE COLLECTED: 05/25/17
DATE ANALYZED: 06/07/17
DATE REPORTED: 06/21/17
PARAMETERS, ug/1
Effluent
1.
Chloromethane
< 10.00
2.
Vinyl Chloride
< 10.00
3.
Bromomethane
< 10.00
4.
Chloroethane
< 10.00
5.
Trichlorofluoromethane
< 5.00
6.
1,1-Dichloroethane
< 5.00
7.
Methylene Chloride
< 10.00
8.
trans-1,2-Dichloroethene
< 5.00
9.
1,1-Dichloroethene
< 5.00
10.
Chloroform
< 5.00
11.
1,1,1-Trichloroethane
< 5.00
12.
Carbon Tetrachloride
< 5.00
13.
Benzene
< 5.00
14.
1,2-Dichloroethane
< 5.00
15.
Triebloroethene
< 5.00
16.
1,2-Dichloropropane
< 5.00
17.
Bromodichloromethane
< 5.00
18.
2-Chloroethylvinyl Ether
< 5.00
19.
cis-1,3-Dichloropropene
< 5.00
20.
Toluene
< 5.00
21.
trans-1,3-Dichloropropene
< 5.00
22.
1,1,2-Trichloroethane
< 5.00
23.
Tetrachloroethene
< 5.00
24.
Dibromochloromethane
< 5.00
25.
Chlorobenzene
< 5.00
26.
Ethylbenzene
< 5.00
27.
Bromoform
< 5.00
28.
1,1,2,2-Tetrachloroethane
< 5.00
29.
1,3-Dichlorobenzene
< 5.00
30.
1,4-Dichlorobenzene
< 5.00
31.
1,2-Dichlorobenzene
< 5.00
32.
Acrolein
< 100.00
33.
Acrylonitrile
< 50.00

P.O. BOX 7085, 114 OAKMONT DRIVE
GREENVILLE, N.C. 27835-7085
CLIENT: TOWN OF ROBERSONVILLE WWTP
C/O ENVIROLINK
P.O. BOX 670
BAILEY, NC 27807 6
REVIEWED BY-F
SEMIVOLATILE ORGANICS
EPA METHOD 625
PHONE [phone]
FAX [phone]
CLIENT ID: 133 F
ANALYST: JAP
DATE COLLECTED: 05/25/17 Page: 1
DATE EXTRACTED: 06/01/17
DATE ANALYZED: 06/06/17
DATE REPORTED: 06/21/17
PARAMETERS, ug/l
Effluent
1.
N-Nitrosodimethylamine
< 10.00
2.
Phenol
< 10.00
3.
Bis(2-Chloroethyl) Ether
< 10.00
4.
2-Chlorophenol
< 10.00
5.
1,3-Dichlorobenzene
< 10.00
6.
1,4-Dichlorobenzene
< 10.00
7.
1,2-Dichlorobenzene
< 10.00
8.
Bis(2-Chloro-l-methylethyl) Ether
< 10.00
9.
Hexachloroethane
< 10.00
10.
N-Nitrosodi-N-Propylamine
< 10.00
11.
Nitrobenzene
< 10.00
12.
Isophorone
< 10.00
13.
2-Nitrophenol
< 10.00
14.
2,4-Dimethylphenol
< 10.00
15.
Bis(2-Chloroetlioxy) Methane
< 10.00
16.
2,4-Dichlorophenol
< 10.00
17.
1,2,4-Trichlorobenzene
< 10.00
18.
Naphthalene
< 10.00
19.
Hexachlorobutadiene
< 10.00
20.
4-Chloro-3-Methylphenol
< 20.00
21.
Hexachlorocyclopentadiene
< 10.00
22.
2,4,6-Trichlorophenol
< 10.00
23.
2-Chloronaphthalene
< 10.00
24.
Acenaphthylene
< 10.00
25.
Dimethylphthalate
< 10.00
26.
2,6-Dinitrotoulene
< 10.00
27.
Acenaphthene
< 10.00
28.
2,4-Dinitrophenol
< 50.00
29.
4-Nitrophenol
< 50.00
30.
2,4-Dinitrotoluene
< 10.00
31.
Fluorene
< 10.00
32.
Diethylphthalate
< 10.00
33.
4-Chlorophenyl Phenyl Ether
<10.00
34.
4,6-Dinitro-2-iVlethylphenol
< 50.00
35.
N-Nitrosodiphenylaniine
< 10.00
36.
4-Bromophenyl Phenyl Ether
<10.00
37.
Hexachlorobenzene
< 10.00
38.
Pentachlorophenol
< 50.00
39.
Phenanthrene
< 10.00
40.
Anthracene
< 10.00
41.
Di-N-Butylphthalate
< 10.00
42.
Fluoranthene
< 10.00
43.
Benzidine
< 100.00
44.
Pyrene
< 10.00
45.
Butylbenzylphthlate
< 10.00
46.
Benzo[a]anthracene
< 10.00
47.
3,3-Dichlorobenzadine
< 10.00
48.
Chrysene
< 10.00

P.O. BOX 7085, 114 OAKMONT DRIVE PHONE [phone]
GREENVILLE, N.C. 27835-7085 FAX [phone]
CLIENT: TOWN OF ROBERSONVILLE WWTP
C/O ENVIROLINK
P.O. BOX 670
BAILEY, NC 27807
6
REVIEWED A:�
SEMIVOLATILE ORGANICS
EPA METHOD 625
CLIENT ID: 133 F
ANALYST: JAP
DATE COLLECTED: 05/25/17
DATE EXTRACTED: 06/01/17
DATE ANALYZED: 06/06/17
DATE REPORTED: 06/21/17
PARAMETERS, ugA
Effluent
49.
Bis(2-Ethylhexyl)phthalate
<20.00
50.
Di-N-Octylphthalate
< 10.00
51.
Benzo[b]fluoranthene
< 10.00
52.
Benzo[k]fluoranthene
< 10.00
53.
Benzo[a]pyrene
< 10.00
54.
Indeno(1,2,3-C,d)pyrene
< 10.00
55.
Dibenzo[a,h]anthracene
< 10.00
56.
Benzo[g,h,i]perylene
< 10.00
57.
1,2-Diphenylhydrazine
< 10.00
Page: 2

Contact: James Pittman Report Date:
Client: Robersonville (Envirolink) NPDES #:
P.O. Box 670 Project:
Bailey, NC 27807 Date Sample Rcvd:
Meritech Work Order # 11211901
Parameters
Sample: Effluent Composite
12/16/2019
NC0026042
Robersonville WWTP
11/21/2019
11/19-20/19
Results Analysis Date Reporting Limit Method
Total Dissolved Solids
420 mg/L
11/22/19
10.0 mg/L
SM 2540C
Ammonia, Nitrogen
<0.1 mg/L
11/21/19
0.1 mg/L
EPA 350.1
TKN
1.90 mg/L
11/22/19
0.20 mg/L
EPA 351.1
Nitrate/Nitrite, Nitrogen
5.54 mg/L
11/25/19
0.10 mg/L
EPA 353.2
Antimony, total
0.0006 mg/L
11/25/19
0.0005 mg/L
EPA 200.8
Arsenic, total
<0.002 mg/L
11/25/19
0.002 mg/L
EPA 200.8
Beryllium, total
<0.0005 mg/L
11/25/19
0.0005 mg/L
EPA 200.8
Cadmium, total
<0.00015 mg/L
11/25/19
0.00015 mg/L
EPA 200.8
Chromium, total
<0.002 mg/L
11/25/19
0.002 mg/L
EPA 200.8
Copper, total
0.006 mg/L
11/25/19
0.002 mg/L
EPA 200.8
Lead, total
0.0014 mg/L
11/25/19
0.0005 mg/L
EPA 200.8
Nickel, total
0.0016 mg/L
11/25/19
0.0005 mg/L
EPA 200.8
Phosphorus, total
0.931 mg/L
11/27/19
0.020 mg/L
EPA 200.7
Selenium, total
<0.001 mg/L
11/25/19
0.001 mg/L
EPA 200.8
Silver, total
<0.0005 mg/L
11/25/19
0.0005 mg/L
EPA 200.8
Thallium, total
<0.00015 mg/L
11/25/19
0.00015 mg/L
EPA 200.8
Zinc, total
0.018 mg/L
11/25/19
0.005 mg/L
EPA 200.8
Hardness, total
28 mg/L
11/27/19
1 mg/L
SM 2340C
Cyanide, total
<0.005 mg/L
11/22/19
0.005 mg/L
EPA 335.4
Phenols, total
0.011 mg/L
11/26/19
0.010 mg/L
EPA 420.1
EPA 624.1
Attached
11/22/19
-
EPA 624.1
EPA 625.1
Attached
12/12/19
-
EPA 625.1
Meritech Work Order # 11211902
Parameters
Oil & Grease (HEM)
Sample: Effluent Grab
Result
<5 mg/L
Analysis Date
11/25/19
I hereby certify that I have reviewed and approve these data.
11/20/2019
Reporting Limit Method
5 mg/L EPA 1664B
Labora dry Lte resentative
642 Tamco Road, Reidsville, North Carolina 27320
tel.[phone] fax.[phone]

Client:
Project:
MERITECH, INC.
Environmental Laboratories
Laboratory Certification #165
Robersonville (Envirolink) Meritech ID#: 11211901
Robersonville WWTP
Client Sample ID: Effluent
Sample Collection: 11/20/19
Analysis:
11/22/19
Analyst:
VWV
Dilution Factor:
1
Report Date:
11/29/19
EPA 624.1 VOLATILE ORGANICS
Parameter
Result
Benzene
< 1.00 ug/L
Dichlorobromomethane
2.49 ug/L
Bromoform
< 1.00 ug/L
Methyl Bromide
< 5.00 ug/L
Carbon Tetrachloride
< 1.00 ug/L
Chlorobenzene
< 1.00 ug/L
Chloroethane
< 5.00 ug/L
2-Chloroethyl vinyl ether
< 5.00 ug/L
Chloroform
9.54 ug/L
Methyl Chloride
< 5.00 ug/L
Chlorodibromomethane
< 1.00 ug/L
1,2-Dibromoethane
< 1.00 ug/L
1,1-Dichloroethane
< 1.00 ug/L
1,2-Dichloroethane
< 1.00 ug/L
1,4-Dichlorobenzene
< 1.00 ug/L
1,2-Dichlorobenzene
< 1.00 ug/L
1,3-Dichlorobenzene
< 1.00 ug/L
1,1-Dichloroethylene
< 1.00 ug/L
trans-1,2-Dichloroethylene
< 1.00 ug/L
1,2-Dichloropropane
< 1.00 ug/L
cis- 1,3 -Dichloropropylene
< 1.00 ug/L
trans-1,3-Dichloropropylene
< 1.00 ug/L
Ethyl benzene
< 1.00 ug/L
Methylene chloride
< 1.00 ug/L
1,1,2,2-Tetrachloroethane
< 1.00 ug/L
Tetrachloroethylene
< 1.00 ug/L
Toluene
< 1.00 ug/L
1, 1, 1 -Trichloroethane
< 1.00 ug/L
1,1,2-Trichloroethane
< 1.00 ug/L
Trichloroethylene
< 1.00 ug/L
Trichlorofluoromethane
< 5.00 ug/L
Vinyl chloride
< 5.00 ug/L
Additional Compounds
Acrolein
< 50.0 ug/L
Acrylonitrile
< 10.0 ug/L
I hereby certify that I have reviewed and approve these data.
Laborat ry Repre-s-&itative
642 Tamco Road * Reidsville, NC 27320
[phone] * [e-mail]

Client:
Project:
Client Sample ID:
Sample Collection:
Report Date:
MERITECH, INC.
Environmental Laboratories
Laboratory Certificate #165
Robersonville (Envirolink)
Robersonville WWTP
Effluent
11/20/19
12/13/19
Meritech ID#: 11211901
Analysis: 12/12/19
Extraction: 11/25/19
Analyst: PM
Dilution Factor: 1
EPA 625.1 SEMIVOLATILE ORGANICS
Parameter
Result
Parameter
Result
Acenaphthene
<10 ug/L
Fluoranthene
<10 ug/L
Acenaphthylene
<10 ug/L
Fluorene
<10 ug/L
Anthracene
<10 ug/L
Hexachlorobenzene
<10 ug/L
Benzidine
<50 ug/L
Hexachlorobutadiene
<10 ug/L
Benzo(a)anthracene
<10 ug/L
Hexachlorocyclopentadiene
<50 ug/L
Benzo(a)pyrene
<10 ug/L
Hexachloroethane
<10 ug/L
Benzo(b)fluoranthene
<10 ug/L
Indeno(1,2,3-cd)pyrene
<10 ug/L
Benzo(k)fluoranthene
<10 ug/L
Isophorone
<10 ug/L
Benzo(g,h,i)perylene
<10 ug/L
2-Methylnaphthalene
<10 ug/L
Benzyl butyl phthalate
<10 ug/L
Naphthalene
<10 ug/L
Bis(2-chloroethoxy)methane
<10 ug/L
Nitrobenzene
<10 ug/L
Bis(2-chloroethyl)ether
<10 ug/L
N-Nitrosodimethylamine
<10 ug/L
Bis(2-chloroisopropyl)ether
<10 ug/L
N-Nitrosodi-n-propylamine
<10 ug/L
Bis(2-ethylhexyl)phthalate
<10 ug/L
N-Nitrosodiphenylamine
<10 ug/L
4-Bromophenylphenyl ether
<10 ug/L
Phenanthrene
<10 ug/L
2-Chloronaphthalene
<10 ug/L
Pyrene
<10 ug/L
4-Chlorophenyl phenyl ether
<10 ug/L
1,2,4-Trichlorobenzene
<10 ug/L
Chrysene
<10 ug/L
Dibenzo(a,h)anthracene
<10 ug/L
4-Chloro-3-methylphenol
<10 ug/L
1,2-Dichlorobenzene
<10 ug/L
2-Chlorophenol
<10 ug/L
1,3-Dichlorobenzene
<10 ug/L
2,4-Dichlorophenol
<10 ug/L
1,4-Dichlorobenzene
<10 ug/L
2,4-Dimethylphenol
<10 ug/L
3,3'-Dichlorobenzidine
<50 ug/L
2,4-Dinitrophenol
<50 ug/L
Diethyl phthalate
<10 ug/L
4,6-Dinitro-2-methylphenol
<50 ug/L
Dimethyl phthalate
<10 ug/L
2-Nitrophenol
<10 ug/L
Di-n-butyl phthalate
<10 ug/L
4-Nitrophenol
<50 ug/L
2,4-Dinitrotoluene
<10 ug/L
Pentachlorophenol
<50 ug/L
2,6-Dinitrotoluene
<10 ug/L
Phenol
<10 ug/L
Di-n-octyl phthalate
<10 ug/L
2,4,6-Trichlorophenol
<10 ug/L
1,2-Diphenylhydrazine
<10 ug/L
I hereby certify that I have reviewed and approve these data.
L oratory Represent
ive
642 Tamco Road * Reidsville, NC 27320
[phone] * [e-mail]

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Permit NCO026042
A- (6) EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S.143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One
scan must be performed in each of the following years: 2017, 2018, and 2019. Analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are
present in concentrations greater than applicable standards and criteria. Samples should be collected with one
quarterly toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same quarter
every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable!'
Ammonia (as N)
CO6`10
1,2dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Chlorine (total residual, TRC)
50M
Trans-12-dichlomethylene
34546
Bis (2-chlomethyl) ether
34273
Dissolved oxygen
00300
1,Ulchioroethylene
34501
Bis (2-chloroisopropyl) ether
34283
Nitrate
00620
1,2drehlompropane
34541
Bis (2-ethylhexyl) phthalate
39100
Nitrite
00615
1,3dichkrmpropylene
77163
4-bmmophenyl phenyl ether
34636
lgeldahl nitrogen
00625
Ethylbenzene
34371
Butyl benzyl phthalate
34292
Oil and grease
00556
Methyl bromide
34413
2-chlomnaphthalene
34581
Phosphorus
C0665
Methyl chloride
34418
4-chlor*enyl phenyl ether
W41
Total dissolved solids
70295
Methylene chloride
34423
Chrysene
34320
Hardness
009DO
1,1,2,2-tebaddoroethane
81549
DM -butyl phthalate
39110
Antimony
01097
Tetrachloroethylene
34475
Df n-octyl phthalate
34596
Arsenic
01002
Toluene
34010
Dibenzo(a,h)anthracene
34556
Beryllium
01012
1,1,1 tichloroethane
34506
1,2dichlorobenzene
34536
Cadmium
01027
1,1,2-trichlomethane
34511
1,3dichlorobenzene
34566
Chromium
01034
Trk,hloroethylene
39180
1,4-dfchlarobenzene
34571
Copper
01042
Vnyi chloride
39175
3,3dichlorobenzidine
34631
Lead
01051
Add-Wmclable compounds:
Diethyl phthalate
34336
Mercury (Method 1631E)
COMER
P-chloroqn-cxeso
34452
Dimethyl phthalate
34341
Nickel
01067
2-chlomphenal
34586
2,4-dinfttoluene
34611
Selenium
01147
2,4dichiorophenol
34601
2,6diniitratoluene
C0626
Silver
01077
2,4dimethylphenol
34606
1,2diphenylhydrazine
34346
Thallium
01059
4,6dinilroo cresol
34657
Fluorahthene
C0376
Zinc
01092
2,4dfnftphenol
34616
Fluorene
34381
Cyanide.
00720
2-nftphenol
34591
Hexachlombenzene
C0700
Total phenolic compounds
32730
4-nitrophenol
34646
Hexachlorobutadiene
39702
Votagleamaniccommunds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadfene
34386
Aaolefn
34210
Phenol
34694
Hexachforoethane
34396
Acryloniitrile
34215
2,4,Wrhlomphenol
34621
indeno(1,2,3-od)pyrene
34403
Benzene
34030
case i eulraf compounds
Isophorone
34408
Bromoform
32104
Acenaphthene
34205
Naphthalene
34696
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
34447
Chlorobenzene
34301
Anthracene
CO22D
N-nitroso&n-propylamine
34428
ChlDrodibromomethane
34306
Benadine
39120
N-nftsodimethyfamine
34438
Chloroethane
85811
Benzo(a)anthracene
34526
N-nitrosodiphenylamine
34433
2-cblomethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
34461
Chiomform
32106
3,4 benzofiuoranthene
34230
Pyrene
34469
Dichlorobromomethane
32101
Benzo(gh)perylene
34521
12,4-trichlombenzene
34551
1,1-dichforoethane
34496
Benzo(k)Suoranthene
34242
Reporting. Test results shall be reported electronically via eDMR or on DWR Form — DMR-PPA-1 (or on a
form approved by the Director) by December 3151 of each designated sampling year. The report shall be
submitted to the following address:
NC DEQ / DWR / Central Files,1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Page 8of12

Meritech, Inc.
Environmental Laboratory
Laboratory Certification No. 165
ra- i
Contact: Josh Powers/William Lamm
Client: Robersonville(Envirolink)
P.O. Box 670
Bailey, NC 27807
Report Date:
NPDES#:
Project:
Date Sample Rcvd:
4/11/2023
NC0026042
Robersonville WWTP
3/29/2023
Meritech Work Order #
032923105
Sample:
Effluent Composite
3/28-29/23
Parameters
Results
Analysis Date
Reporting Limit
Meth od
Total Dissolved Solids
336
mg/L
3/29/23
10.0
mg/L
SM 2540C
Ammonia, Nitrogen
0.6
mg/L
4/3/23
0.1
mg/L
EPA 350.1
TKN
2.50
mg/L
4/5/23
0.20
mg/L
EPA 351.1
Nitrate/Nitrite, Nitrogen
2.48
mg/L
3/31/23
0.10
mg/L
EPA 353.2
Antimony, total
<0.0005
mg/L
4/4/23
0.0005
mg/L
EPA 200.8
Arsenic, total
<0.002
mg/L
4/4/23
0.002
mg/L
EPA 200.8
Beryllium, total
<0.0005
mg/L
4/4/23
0.0005
mg/L
EPA 200.8
Cadmium, total
<0.00015
mg/L
4/4/23
0.00015
mg/L
EPA 200.8
Chromium, total
<0.002
mg/L
4/4/23
0.002
mg/L
EPA 200.8
Copper, total
0.050
mg/L
4/4/23
0.002
mg/L
EPA 200.8
Lead, total
<0.0005
mg/L
4/4/23
0.0005
mg/L
EPA 200.8
Nickel, total
0.0012
mg/L
4/4/23
0.0005
mg/L
EPA 200.8
Phosphorus, total
1.02
mg/L
4/4/23
0.020
mg/L
EPA 200.7
Selenium, total
<0.001
mg/L
4/4/23
0.001
mg/L
EPA 200.8
Silver, total
<0.0005
mg/L
4/4/23
0.0005
mg/L
EPA 200.8
Thallium, total
<0.0005
mg/L
4/4/23
0.00015
mg/L
EPA 200.8
Zinc, total
0.027
mg/L
4/4/23
0.005
mg/L
EPA 200.8
Hardness, total (calculation)
28
mg/L
4/4/23
1
mg/L
SM 2340B
Cyanide, total
<0.005
mg/L
4/6/23
0.005
mg/L
EPA 335.4
Phenols, total
<0.010
mg/L
3/31/23
0.010
mg/L
EPA 420.1
EPA 624.1
Attached
4/1/23
-
EPA 624.1
EPA 625.1
Attached
4/6/23
-
EPA 625.1
Mentech Work Order #
032923106
Sample:
Effluent Grab
3/29/2023
Parameters
Result
Analysis Date
Reporting Limi
Method
Oil & Grease (HEM)
<5.0
mg/L
4/3/23
5.0
mg/L
EPA 1664B
I hereby certify that I have reviewed and approve these data. �] p(i(A u ock,
Laboratory Representative
642 Tamco Road, Reidsville, North Carolina 27320
tel.[phone] fax.[phone]

MERITECH, INC.
Environmental Laboratories
Laboratory Certification #165
Client: Envirolink / Robersonville Meritech ID#: 032923105
Project: PPA / Effluent Pollutant Scan Analysis: 04/01/23
Client Sample ID: Effluent Analyst: V WV
Sample Collection: 03/29/23 Dilution Factor: 1
Report Date: 04/06/23
EPA 624.1 VOLATILE ORGANICS
Parameter
Result
Benzene
< 1.00 ug/L
Dichlorobromomethane
< 1.00 ug/L
Bromoform
< 1.00 ug/L
Methyl Bromide
<5.00 ug/L
Carbon Tetrachloride
< 1.00 ug/L
Chlorobenzene
< 1.00 ug/L
Chloroethane
< 5.00 ug/L
2-Chloroethyl vinyl ether
< 5.00 ug/L
Chloroform
5.02 ug/L
Methyl Chloride
< 5.00 ug/L
Chlorodibromomethane
< 1.00 ug/L
1,2-Dibromoethane
< 1.00 ug/L
1,1-Dichloroethane
< 1.00 ug/L
1,2-Dichloroethane
< 1.00 ug/L
1,4-Dichlorobenzene
< 1.00 ug/L
1,2-Dichlorobenzene
< 1.00 ug/L.
1,3-Dichlorobenzene
< 1.00 ug/L
1,1-Dichloroethylene
< 1.00 ug/L
trans-1,2-Dichloroethylene
< 1.00 ug/L
1,2-Dichloropropane
< 1.00 ug/L
cis-1,3-Dichloropropylene
< 1.00 ug/L
trans- l,3-Dichloropropylene
< 1.00 ug/L
Ethyl benzene
< 1.00 ug/L
Methylene chloride
< 1.00 ug/L,
1,1,2,2-Tetrachloroethane
< 1.00 ug/L
Tetrachloroethylene
< 1.00 ug/L
Toluene
< 1.00 ug/L.
1,1,1-Trichloroethane
< 1.00 ug/L
1,1,2-Trichloroethane
< 1.00 ug/L
Trichloroethylene
< 1.00 ug/L
Trichlorofluoromethane
< 5.00 ug/L
Vinyl chloride
< 5.00 ug/L
Additional Compounds
Acrolein
<50.0 ug/L
Acrylonitrile
<10.0 ug/L
I hereby certify that I have reviewed and approve these data.
Laboratory Representative
642 Tamco Road' Reidsville, NC 27320
[phone]' [e-mail]

Client:
Project:
Client Sample ID:
Sample Collection:
Report Date:
Parameter
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
Benzo(b)fluoranthene
Benzo(k)fluoranthene
Benzo(g,b,i)perylene
Benzyl butyl phthalate
Bis(2-chloroethoxy)methane
Bis(2-chloro ethyl)ether
Bis(2-chloroisopropyl)ether
B is(2-ethylhexyl )phthalate
4-Bromophenyl phenyl ether
2-Chloronaphthalene
4-Chlorophenyl phenyl ether
Chrysene
Dibenzo(a,h)anthracene
12-Dichlorobenzene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
3,3'-Dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
Di-n-butyl phthalate
2,4-Dinitrotoluene.
2,6-Dinitrotoluene
Di-n-octyl phthalate
1,2-Diphenylhydrazine
MERI TECH, INC.
Environmental Laboratories
Laboratory Certificate #165
Robersonville (Envirolink)
625.1
Effluent
03/29/23
04/11/23
Meritech ID#: 032923105
Analysis:
04/06/23
Extraction:
04/03/23
Analyst:
PM
Dilution Factor:
I
EPA 625.1 SEMiVOLATILE ORGANICS
Result
Parameter
Result
<10 ugIL
Fluoranthene
<10 ug/L
<10 ug/L
Fluorene
<10 ug/L
<10 ug/L.
Hexachlorobenzene
<10 ug/L
<50 ug/L
Hexachlorobutadiene
<10 ug/L
<10 ug/L
Hexachlorocyclopentadiene
<50 ug/L
<10 ug/L
Hexachloroethane
<10 ug/L
<10 ug/L
Indeno(1,2,3-cd)pyrene
<10 ug/L
<10 ug/L
Isophorone
<10 ug/L
<10 ug/L
2-Methylnaphthalene
<10. ug/L
<10 ug/L
Naphthalene
<10 ug/L
<10 ug/L
Nitrobenzene
<10 ug/L
<10 ug/L
N-Nitrosodimethylamine
<10 ug/L
<10 ug/L
N-Nitrosodi-n-propylamine
<10 ug/L
<10 ug/L
N-Nitrosodiphenylamine
<10 ug/L
<10 ug/L
Phenanthrene
<10 ug/L
<10 ug/L
Pyrene
<10 ug/L
<10 ug/L
1,2,4-Trichlorobenzene
<10 ug/L
<10 ug/L
<10 ugil,
4-Chloro-3-methylphenol
<10 ug/L
<10 ug/L
2'-Chlorophenol
<10 ug/L
<10 ug/L
2,4-Dichlorophenol
<10 ug/L
<10 ug/L
2,4-Dimethylphenol
<10 ug/L
<50 ug/L
2,4-Dinitrophenol
<50 ug/L
<10 ug/L
4,6-Dinitro-2-methylphenol
<50 ug/L
<10 ug/L
2-Nitrophenol
<10 ug/L
<10 ug/L
4-Nitrophenol
<50 ug/L
<10 ug/L
Pentachlorophenol
<50 ug/L
<10 ug/L
Phenol
<10 ug/L
<10 ug/L
2,4,6-Trichlorophenol
<10 ug/L
<10 ug/L
I hereby certify that I have reviewed and approve these data. b14'a�� W, (/' '
Laboratory Representative
642 Tamco Road * Reidsville, NC 27320
[phone] * [e-mail]

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Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test Date:5/19/2021
Facility: Robersonville
Laboratory: Meritech, Inc.
x ii l/^-/
Signature of Laboratory
NPDES # NC00 26042
le Charge/Email/Phone Number
MAIL ORIGINAL TO: Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Pipe #: 001 County: Martin
Test Initiation Date/Time 5/11/2021 5:53 PM Avg Wt/Surv. Control 0.826
7-1
% Eff. Repl. 1 2 3 4
Control Surviving #
Original #
Wt/original (mg)
F__2_2_._5__j Surviving #
Original #
Wt/original (mg)
10
10
10
10
10
10
10
10
0.815
0.846
0.786
0.857
9
10
10
10
10
10
10
10
0.642
0.796
0.952
0.850
% Survival 100.0
Avg Wt (mg) 0.826
Test Organisms
Cultured In -House
t_ Outside Supplier
Hatch Date: 5/10/21
% Survival 97-5---1 Hatch Time: 4:00-5:00 pm
Avg Wt (mg) 0.810
F___4_5__j Surviving #
9
10
10
10
% Survivall 97.5
Original #
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Ternp. at Receipt (°C)
10
10
10
10
0.746
0.864
0.761
0.855
10
10
9
10
10
10
10
10
10
10
10
10
0.870
0.715
0.786
0.880
7.80
/ 7.77
8.04
/ 7.64
7.98
/ 7.64
7.74 / 7.66
7.82
/ 7.90
8.00
! 7.77
7.48 / 7.40
7.92
/ 8.37
8.11
/ 8.43
7.80
/ 8.35
7.97 ! 8.42
7.76
/ 8.57
8.40
/ 8.37
8.20 / 8.26
8.29
/ 7.76
8.47
/ 7.28
8.34
J 7.50
8.15 / 7.61
8.03
! 8.04
8.15
/ 7.53
7.99 / 6.90
24.8
/ 24.0
24.2
/ 24.9
24.7
/ 24.4
24.3 / 24.6
24.3
/ 24.4
24.5
! 24.2
24.3 / 24.9
1 2 3
5/10/2021
5/12/2021
5l13/2021
24.6
24.2
25.1
22
22
24
187
189
196
724
755
759
<0.1
<0.1
<0.1
1.2
0.9
2.3
Dilution H2O Batch # 1569 1570 1571
Hardness (mg/L) 46 44 44
Alkalinity (mg/L) 33 32 31
Conductivity (umhos/cm) 173 154 169
Survival
Growth Overall Result
Normal
(-`[;
w,;f; ChV >100
Hom. Var.
F)
171'
NOEC
100
100
LOEC
>100
>100
ChV
>100
>100
Method
Steel's
Dunnett's
Slats
Survival
Growth
Conc.
Critical Calculated
Critical Calculated
22.5
10 16
2.41 0.2769
45
10 16
2.41 0.3375
75
10 16
2.41 0.1558
90
10 18
2.41 0.3504
100
10 18
2.41 0.2293
ILIA/rl Fnrm dT_ri /1//1G1

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test Date:7/22/2021
Facility: Robersonville
Laboratory: Meritech, Inc.
x
Signature of Operator in
x 21;11X
Signature of Laboratory
NPDES # NC00 26042
Charge/Email/Phone Number
Pipe #: 001
Comments
County: Martin
MAIL ORIGINAL TO:
Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Test Initiation Date/Time
7/13/2021
3:42 PM
Avg WUSurv. Control 0.554
Test Organisms
% Eff. Repl.
1
2
3
4
Cultured In -House
Control Surviving #
10
10
10
10
% Survival 100.0
F Outside Supplier
Original #
45 Surviving #
Original #
Wt/original (mg)
75 Surviving #
Original #
Wt/original (mg)
10
10
10
10
10
10
10
10
0.552
0.468
0.560
0.497
9
9
9
10
10
10
10
10
0.512
0.526
0.432
0.558
10
10
10
10
10
10
10
10
0.695
0.530
0.498
0.499
%Survival 92.5
Avg Wt (mg) 0.507
Survival 100.0
Avg Wt (mg) 0.556
90 Surviving #
%Survival
100.0�
Original #
Wt/original (mg)
Avg Wt (mg)
_0...534..__�
100 Surviving #
%Survival
97.5
Original #
Wt/original (mg)
Avg Wt (mg)
0.502
Water Quality Data
Day
Control
0
1
2
3
4
5
6
pH (SU) IniUFin
DO (mg/L) IniUFin
Temp (C) IniUFin
High Concentration
0
1
2
3
4
5
6
pH (SU) IniUFin
DO (mg/L) IniUFin
Temp (C) IniUFin
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Temp. at Receipt (°C)
9
10
10
10
10
10
10
10
0.481
0.443
0.576
0.508
7.93 / 7.73
7.78 17,54
7.77 / 7.77
7.90 17.91
7.99 / 7.97
7.98 1 7.71
7.77 / 7.57
6.73 / 7.43
7.92 / 7.13
7.81 1 7.67
7.99 / 7.67
7.89 / 7.90
8.16 / 7.28
8.00 J 7.17
24.5 / 24.0
24.4 / 24.3
285.2 124.3
24.3 ! 24.2
24.6 / 24.7
24.4 / 24.2
24.6 / 24.4
8.10 / 8.33
8.04
/ 8.28
7.83 / 8.21
8.03 / 8.42
7.93 / 8.45
8.38
/ 8.12
8.16
/ 8.12
8.32 / 7.43
8.15
/ 6.88
8.25 / 7.59
8.38 / 7.63
8.14
/ 8.00
8.07
/ 7.33
8.06
/ 7.05
24.7 / 24.5
24.2
/ 24.1
24.7 ! 24.2
24.0 / 24.1
24.1
/ 24.3
24.4
/ 24.0
25.9
/ 24.6
7/12/2021
7/14/2021
7! 15/2021
24.3
24.0
_24.9
22
24
24
124
109
120
512
537
591
<0.1
<0.1
<0.1
1.9
1.3
1.4
Dilution H2O Batch # 1581 1582 1583
Hardness (mg/L) 44 44 45
Alkalinity (mg/L) 32 30 30
Conductivity (umhos/cm) 161 168 161
Normal
171
�?� ChV 7100
Hom. Var.
r" ;
FYI
NOEC
100
100
LOEC
>100
>100
ChV
>100
>100
Method
Steel's
Dunnett's
Stats
Survival
Growth
Conc.
Critical
.Calculated
Critical Calculated
22.5
10
18
2.41
0.8817
45
10
12
2.41
1.1903
75
10
18
2.41
-0.0315
90
10
18
2.41
0.5227
100
10
16
2.41
1.3162
10
10
10
10
10
10
10
10
0.543
0.578
0.521
0.492

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test Date:8/13/2021
Facility: Robersonville NPDES # NC00 26042
Laboratory: Meritech, Inc.
x
Signature of Operator iinn%Resp s
-110
Signature of Laboratory Supervisor
Charge/Email/Phone Number
MAIL ORIGINAL TO: Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Test Initiation Date/Time
8/3/2021
4:50 PM
% Eff. Repl.
1
2
3
Control Surviving #
Original #
Wt/original (mg)
22.5 Surviving #
Original #
Wt/original (mg)
45 Surviving #
Original #
Wt/original (mg)
75 Surviving #
Original #
Wt/original (mg)
90 Surviving #
Original #
Wt/original (mg)
4
Pipe #: 001 County: Martin
Avg Wt/Surv. Control 0.726
10
10
10
10
10
10
10
10
0.759
0.656
0.728
0.762
10
10
10
10
10
10
10
10
0.681
0.675
0.693
0.560
9
10
10
10
10
10
10
10
0.629
0.751
0.713
0.671
10
10
10
10
10
10
10
10
0.717
0.709
0.904
0.670
10
10
8
10
10
10
10
10
0.618
0.633
0.580
0.673
F-10-7-1 Surviving #
Original #
Wt/original (mg)
Water Quality Data
Control
0
1
2
pH (SU) Init/Fin
DO (mg/L) InIUFin
Temp (C) InIUFln
High Concentration
o
1
2
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
1
2
3
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Temp. at Receipt (°C)
Day
% Survival 100.0
Avg Wt (mg) 0.726
% Survival 100.0
Avg Wt (mg) 0.652
% Survival 97.5
Avg Wt (mg) 0.691
% Survival 100.0
Avg Wt (mg) 6.750
% Survival 95.0
Avg Wt (mg) 0.626
% Survival 92.5
Avg Wt (mg) 0.583
3 4 5 6
Test Organisms
Cultured In -House
i= Outside Supplier
Hatch Date: 8/2/21
Hatch Time: 4:00-5:00 pm
7.88 / 7.80
7.77 / 7.61
7.86 / 7.63
7.68 / 7.85
7.84 / 7.93
7.93 / 7.62
7.69 / 7.29
7.14 / 7.55
7.87 / 7.30
7.80 / 7.24
7.80 / 7.57
7.77 / 7.97
8.16 / 7.25
7.87 / 6.13
24.8 / 24.5
24.4 / 24,7
24.1 / 24.8
24.1 / 24.4
24.4 / 24.5
24.4 / 24.1
24.6 / 24.0
3 4 5 6
7.91 / 8.19
7.94
/ 8.24
7.71
/ 8.09
7.77 / 8.21
8.07 / 8.26
8.19
/ 7.95
7.78
/ 7.83
8.12 / 7.40
7.85
/ 7.08
8.02
/ 7.22
7.99 / 7.57
7.88 / 7.98
8.13
/ 7.07
7.86
/ 6.02
25.2 / 24.0
25.1
! 24.2
25.2
/ 24.4
24.1 / 24.0
24.6 / 24.3
24.5
/ 24.7
25.3
/ 24.7
8/2/2021
8/4/2021
8/5/2021
24.0
24.1
24.3
32
26
26
122
106
100
651
486
376
<0.1
<0.1
<0.1
1.1
1.3
1.1
Dilution H2O Batch # 1587 1588
Hardness (mg/L) 44 44
Alkalinity (mg/L) 33 32
Conductivity (umhos/cm) 173 158
Survival
Growth Overall Result
Normal
Ils
FI ChV 94.9
Hom. Var,
171
FI'
NOEC
100
90
LOEC
>100
100
ChV
>100
94.9
Method
Steel's
Dunnett's
Slats
Survival
Growth
Conc.
Critical Calculated
Critical Calculated
22.5
10 18
2.41 1.7418
45
10 16
2.41 0.8297
75
10 18
2.41-0.5590
90
10 16
2.41 2.3597
100
10 12
2.41 3.3660
9
10
9
9
10
10
10
10
0.597
0.571
0.592
0.573
DINO Form AT-5 (1104)

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test Date:11111/2021
Facility: Robersonville
Laboratory: Meritech, Inc.
x
Sign9ture of O`�erato '�s�J it
x
Signature of Laboratory Supervisor
NPDES # NC00 26042
le Charge/Email/Phone Number
MAIL ORIGINAL TO: Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Pipe,#: 001 County: Martin
Test Initiation Date/Time 11/2/2021 4:40 PM Avg Wt/Surv. Control 0.627
% Eff. Repl. 1 2 3 4
Control Surviving #
Original #
Wt/original (mg)
22.5 1 Surviving #
Original #
Wt/original (mg)
10
10
10
10
10
10
10
10
0.672
0.640
0.608
0.588
10
10
9
10
10
10
10
10
0.690
0.692
0.542
10.621
nts
% Survival 100.0
Avg Wt (mg) F 0.627_�
Test Organisms
r Cultured In -House
7 Outside Supplier
Hatch Date: 11/1/21
% Survival 97.5 Hatch Time: 4:00-5:00 pm
Avg Wt (mg) 0.638
45 Surviving #
% Survival 92.5
Original #
Wt/original (mg)
Avg Wt (mg)F.0.656
75 Surviving #
% Survival 100.0
Original #
Wt/original (mg)
Avg Wt (mg) 0.677
90 Surviving #
% Survival 97.5
Original #
Wt/original (mg)
Avg Wt (mg) 0.769
100 Surviving #
% Survival 100.0
Original #
Wt/original (mg)
Avg Wt (mg) 0.745
Water Quality Data
Day
Control
0
1
2
3
4 5 6
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Temp. at Receipt (°C)
10
10
10
10
10
10
10
10
0.656
0.695
0.689
0.668
9
10
10
10
10
10
10
10
0.750
0.654
0.731
0.701
10
10
10
10
10
10
10
10
0.683
0.739
0.892
0.666
7.26
/ 7.78
7.77 / 7.78
7.64 / 7.71
7.85
/ 7.95
7.93
/ 7.94
8.11
! 7.89
7.76 / 7.52
7.39
17.06
7.46 / 7.59
8.08 / 7.48
7.86
/ 7.75
7.89
/ 8.24
8.28
17.75
8.13 / 6,81
24.4
/ 24.1
24.3 / 24.5
24.5 / 25.0
25.2
/ 24.9
25.2
/ 25.2
24.6
/ 24.7
25.6 / 24.5
0 1 2 3 4 5 6
7.78
/ 8.31
7.88 / 8.33
7.77
/ 8.31
7.82 / 8.51
8.34
/ 8.53
8.38
/ 8.40
8.06
/ 8.28
7.96
/ 6.99
7.50 / 7.59
8.33
/ 7.33
8.36 / 7.73
8.13
/ 8.27
8.25
/ 7.68
8.24
/ 7.04
24.2
1 24.2
24.7 / 25.4
24.7
/ 25.3
24.5 / 24.4
25.0
/ 25.4
25.4
/ 24.6
25.4
/ 24.1
1 2 3
11/1/2021
11/3/2021
11/4/2021
23.9
23.8
25.2
26
28
28
183
187
191
1013
1031
1038
<0.1
<0.1
<0.1
1.1
1.1
1.9
Dilution H2O Batch # 1610 1611 1612
Hardness (mg/L) 44 46 44
Alkalinity (mg/L) 31 30 30
Conductivity (umhos/cm) 163 158 162
Survival
Growth
Normal
r_1'
Hom. Var.
NOEC
100
100
LOEC
>100
>100
ChV
>100
>100
Method
Steel's
Dunnett's
Overall Result
ChV >100
Stats
Survival
Growth
Conc.
Critical Calculated
Critical Calculated
22.5
10 16
2.41-0.2396
45
10 12
2.41-0.6351
75
10 18
2.41-1.1142
90
10 16
2.41-1.8273
100
10 18
2.41-2.6296
10
9
9
9
10
10
10
10
0.615
0.654
0.757
0.596

MONITORING REPORT(MR) VIOLATIONS for:
Permit: NCO026042 MRS Betweei 2 - 2017 and11 - 2022 Region: %
Facility Name: % Param Nam(% County: %
Major Minor: %
Report Date: 12/21/22 Page 1 of 73
Violation Category:Limit Violation Program Category: NPDES WW
Subbasin: % Violation Action:
PERMIT: NCO026042
FACILITY: Town of Robersonville - Robersonville WWTP
COUNTY: Martin
REGION: Washington
Limit Violation
MONITORING
VIOLATION
UNIT OF
CALCULATED
%
REPORT
OUTFALL
LOCATION
PARAMETER
DATE
FREQUENCY
MEASURE
LIMIT
VALUE
Over
VIOLATION TYPE
VIOLATION ACTION
11 - 2018
001
Effluent
BOD, 5-Day (20 Deg. C) -
11 /17/18
5 X week
mg/I
7.5
7.65
2
Weekly Average
No Action, BPJ
Concentration
Exceeded
06 - 2019
001
Effluent
BOD, 5-Day (20 Deg. C) -
06/08/19
5 X week
mg/I
7.5
10.68
42.4
Weekly Average
Proceed to NOD
Concentration
Exceeded
06 - 2019
001
Effluent
BOD, 5-Day (20 Deg. C) -
06/15/19
5 X week
mg/I
7.5
29.64
295.2
Weekly Average
Proceed to NOD
Concentration
Exceeded
06 - 2019
001
Effluent
BOD, 5-Day (20 Deg. C) -
06/22/19
5 X week
mg/I
7.5
11.26
50.1
Weekly Average
Proceed to NOD
Concentration
Exceeded
06 - 2019
001
Effluent
BOD, 5-Day (20 Deg. C) -
06/30/19
5 X week
mg/I
5
13.86
177.2
Monthly Average
Proceed to NOD
Concentration
Exceeded
07 - 2022
001
Effluent
BOD, 5-Day (20 Deg. C) -
07/16/22
5 X week
mg/I
7.5
7.84
4.5
Weekly Average
Proceed to NOV
Concentration
Exceeded
12-2017
001
Effluent
Chlorine, Total Residual
12/01/17
5 X week
ug/I
19
44
131.6
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/04/17
5 X week
ug/I
19
32
68.4
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/05/17
5 X week
ug/I
19
24
26.3
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/06/17
5 X week
ug/I
19
33
73.7
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/07/17
5 X week
ug/I
19
31
63.2
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/08/17
5 X week
ug/I
19
24
26.3
Daily Maximum
No Action, BPJ
Exceeded
12-2017
001
Effluent
Chlorine, Total Residual
12/11/17
5Xweek
ug/I
19
38
100
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/12/17
5 X week
ug/I
19
33
73.7
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/13/17
5 X week
ug/I
19
25
31.6
Daily Maximum
No Action, BPJ
Exceeded
12 - 2017
001
Effluent
Chlorine, Total Residual
12/14/17
5 X week
ug/I
19
39
105.3
Daily Maximum
No Action, BPJ
Exceeded

MONITORING REPORT(MR) VIOLATIONS for:
Permit: NCO026042 MRS Betweel 2 - 2017 and11 - 2022 Region: %
Facility Name: % Param Nam(% County: %
Major Minor: %
Report Date: 12/21/22 Page 72 of 73
Violation Category:Limit Violation Program Category: NPDES WW
Subbasin: % Violation Action: %
PERMIT: NCO026042
FACILITY: Town of Robersonville - Robersonville WWTP
COUNTY: Martin
REGION: Washington
Limit Violation
MONITORING
VIOLATION
UNIT OF
CALCULATED
%
REPORT
OUTFALL
LOCATION
PARAMETER
DATE
FREQUENCY
MEASURE
LIMIT
VALUE
Over
VIOLATION TYPE
VIOLATION ACTION
09 - 2022
001
Effluent
Chlorine, Total Residual
09/29/22
5 X week
ug/I
19
29
52.6
Daily Maximum
No Action, BPJ
Exceeded
09 - 2022
001
Effluent
Chlorine, Total Residual
09/30/22
5 X week
ug/I
19
42
121.1
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/03/22
5 X week
ug/I
19
38
100
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/04/22
5 X week
ug/I
19
29
52.6
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/05/22
5 X week
ug/I
19
33
73.7
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/06/22
5 X week
ug/I
19
36
89.5
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/07/22
5 X week
ug/I
19
30
57.9
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/10/22
5 X week
ug/I
19
49
157.9
Daily Maximum
No Action, BPJ
Exceeded
10-2022
001
Effluent
Chlorine, Total Residual
10/11/22
5 X week
ug/I
19
20
5.3
Daily Maximum
No Action, BPJ
Exceeded
10 - 2022
001
Effluent
Chlorine, Total Residual
10/12/22
5 X week
ug/I
19
31
63.2
Daily Maximum
No Action, BPJ
Exceeded
08-2022
001
Effluent
Coliform, Fecal MF, MFC
08/06/22
5 X week
#/100ml
400
445.23
11.3
Weekly Geometric Mean
Proceed to
Broth, 44.5 C
Exceeded
Enforcement Case
01 -2020
001
Effluent
Copper, Total (as Cu)
01/08/20
Monthly
ug/I
17.85
19
6.4
Daily Maximum
Proceed to NOD
Exceeded
01 -2020
001
Effluent
Copper, Total (as Cu)
01/31/20
Monthly
ug/I
13.07
19
45.4
Monthly Average
Proceed to NOD
Exceeded
07-2021
001
Effluent
Copper, Total (as Cu)
07/07/21
Monthly
ug/I
17.85
18
0.8
Daily Maximum
Proceed to NOV
Exceeded
07-2021
001
Effluent
Copper, Total (as Cu)
07/31/21
Monthly
ug/I
13.07
14.5
10.9
Monthly Average
Proceed to NOV
Exceeded
08-2021
001
Effluent
Copper, Total (as Cu)
08/04/21
Monthly
ug/I
17.85
22
23.2
Daily Maximum
Proceed to NOV
Exceeded

MONITORING REPORT(MR) VIOLATIONS for:
Permit: NCO026042 MRS Betweel 2 - 2017 and11 - 2022 Region: %
Facility Name: % Param Nam(% County: %
Major Minor: %
Report Date: 12/21/22 Page 73 of 73
Violation Category:Limit Violation Program Category: NPDES WW
Subbasin: % Violation Action: %
PERMIT: NCO026042
FACILITY: Town of Robersonville - Robersonville WWTP
COUNTY: Martin
REGION: Washington
Limit Violation
MONITORING
VIOLATION
UNIT OF
CALCULATED
%
REPORT
OUTFALL
LOCATION
PARAMETER
DATE
FREQUENCY
MEASURE
LIMIT
VALUE
Over
VIOLATION TYPE
VIOLATION ACTION
08-2021
001
Effluent
Copper, Total (as Cu)
08/31/21
Monthly
ug/I
13.07
22
68.3
Monthly Average
Proceed to NOV
Exceeded
10-2021
001
Effluent
Copper, Total (as Cu)
10/06/21
Monthly
ug/I
17.85
18
0.8
Daily Maximum
Proceed to
Exceeded
Enforcement Case
10-2021
001
Effluent
Copper, Total (as Cu)
10/28/21
Monthly
ug/I
17.85
20
12.0
Daily Maximum
Proceed to
Exceeded
Enforcement Case
10-2021
001
Effluent
Copper, Total (as Cu)
10/31/21
Monthly
ug/I
13.07
19
45.4
Monthly Average
Proceed to
Exceeded
Enforcement Case
11 -2021
001
Effluent
Copper, Total (as Cu)
11/03/21
Monthly
ug/I
17.85
25
40.1
Daily Maximum
Proceed to
Exceeded
Enforcement Case
11 -2021
001
Effluent
Copper, Total (as Cu)
11/30/21
Monthly
ug/I
13.07
25
91.3
Monthly Average
Proceed to
Exceeded
Enforcement Case
12-2021
001
Effluent
Copper, Total (as Cu)
12/08/21
Monthly
ug/I
17.85
23
28.9
Daily Maximum
Proceed to
Exceeded
Enforcement Case
12-2021
001
Effluent
Copper, Total (as Cu)
12/31/21
Monthly
ug/I
13.07
23
76.0
Monthly Average
Proceed to
Exceeded
Enforcement Case
07-2022
001
Effluent
Copper, Total (as Cu)
07/31/22
Monthly
ug/I
13.07
14
7.1
Monthly Average
Proceed to NOV
Exceeded
08-2022
001
Effluent
Copper, Total (as Cu)
08/03/22
Monthly
ug/I
17.85
27
51.3
Daily Maximum
Proceed to
Exceeded
Enforcement Case
08-2022
001
Effluent
Copper, Total (as Cu)
08/31/22
Monthly
ug/I
13.07
27
106.6
Monthly Average
Proceed to
Exceeded
Enforcement Case
06 - 2019
001
Effluent
Nitrogen, Ammonia Total (as
06/15/19
5 X week
mg/I
3.3
5.26
59.3
Weekly Average
Proceed to NOD
N) - Concentration
Exceeded
06 - 2019
001
Effluent
Nitrogen, Ammonia Total (as
06/30/19
5 X week
mg/I
1.1
1.34
21.8
Monthly Average
Proceed to NOD
N) - Concentration
Exceeded
06 - 2021
001
Effluent
Nitrogen, Ammonia Total (as
06/30/21
5 X week
mg/I
1.1
1.25
13.2
Monthly Average
Proceed to NOV
N) - Concentration
Exceeded
06 - 2019
001
Effluent
Solids, Total Suspended -
06/15/19
5 X week
mg/I
45
50
11.1
Weekly Average
Proceed to NOD
Concentration
Exceeded

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United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 IN 1 2 u 3 I NCO026042 I11 121 22/02/08 I17 18LB] 19 I s I 201 I
211IIIII 111111III II III III1 I I IIIII IIIIIIIII II r6
Inspection
Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved -------------------
67
701LJ � I 71 [n LI 72 I Ln, I 71 I 74 79 I I I I I I I80
-1 I I
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES permit Number)
08:OOAM 22/02/08
17/05/01
Robersonville WWTP
1149 Rogerson Rd
Exit Time/Date
Permit Expiration Date
Robersonville NC 27871
10:30AM 22/02/08
21/11/30
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
James Earl Pittman/ORC/252-235-4900/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Elizabeth Jenkins,PO Box 487 Robersonville NC 278710487//252-508-0311/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit 0 Flow Measurement Operations & Maintenar Records/Reports
Self -Monitoring Progran 0 Sludge Handling Dispo: Facility Site Review Effluent/Receiving Wate
Laboratory
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Robert E Bullock DWR/WARD WQ/252-948-3843/
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#

NPDES yr/mo/day Inspection Type
Nco026042 I11 12I 22/02/08 117 18 IBI
(Cont.)
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
The review period for this inspection was September 2018 through December 2021.Two Notice of
Deficiencies, Four Notice of Violations and Two Civil Penalty assessments were issued over the
review period.
A split toxicity sample was taken on February 8th and February 10th. The split samples were sent to
Meritech and Aquatic Toxicity lab in Raleigh for analysis.. Both of these sample results were pass.
The annual report provided during the inspection was not accurate. The annual report did not list all
the months that the facility was Non -Compliant. The annual report listed months that the facility was
Compliant when the facility was actually Non -Compliant with the NPDES permit.
The current permit was set to expire on November 30, 2021. A renewal application has been
submitted and the existing permit will remain effective until a new permit is issued.
Grease in the wastewater is mixing with the grit which is causing the grit to bond together. The ORC
stated that they have to keep breaking up the grit to help remove it from the system.
The "equalization basin" is a anerobic and anoxic zone. On the day of inspection the mixers were off
and there was an excessive amount of solids and vegetation on the top of the basin. The ORC stated
that the mixers were off because with all the solids and vegetation the mixers will plug. With the mixers
not running the basin is acting as a settling basin and this is not the intent of this basin. The ORC
stated that the basin will be cleaned out in March 2022
The digester is almost full. The ORC stated that the sludge will be land applied in March 2022.
On the day of inspection the #5 Clarifier and #6 Clarifiers needed repairs. The #5 Clarifier arm was
not working and the clarifier was online. ORC stated that a shear pin had broken and they are
working to have this repaired. The #6 Clarifier was down and was not operational. James stated that
the gear box for the clarifier arm was damaged and that the gear box had to be rebuilt. The estimate
for replacing the gear box was approximately $70,000 and they are going to bring this to the Town
Council for approval.
The facility is judged to be Non -Complaint with NPDES permit NC0026042.
Page#

Permit: NCO026042
Inspection Date: 02/08/2022
Owner -Facility: Robersonville WWTP
Inspection Type: Bioassay Compliance
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment:
Record Keeping
Are records kept and maintained as required by the permit?
Is all required information readily available, complete and current?
Are all records maintained for 3 years (lab. reg. required 5 years)?
Are analytical results consistent with data reported on DMRs?
Is the chain -of -custody complete?
Dates, times and location of sampling
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
Transported COCs
Are DMRs complete: do they include all permit parameters?
Has the facility submitted its annual compliance report to users and DWQ?
(If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified
operator on each shift?
Is the ORC visitation log available and current?
Is the ORC certified at grade equal to or higher than the facility classification?
Is the backup operator certified at one grade less or greater than the facility
classification?
Is a copy of the current NPDES permit available on site?
Facility has copy of previous year's Annual Report on file for review?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
■ ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
El
El
El
■ ❑ ❑ ❑
■ ❑ ❑ ❑
❑ ❑ ■ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
Comment: The annual report provided during the inspection was not accurate. The annual report
did not list all the months that the facility was Non -Compliant. The annual report listed
months that the facility was Compliant when the facility was actually Non -Compliant with
the NPDES permit.
James Pittman is the ORC with Tony Lucas and Phillip Bone as the backup ORC.
Permit Yes No NA NE
Page# 3

Permit: NCO026042 Owner -Facility: Robersonville WWTP
Inspection Date: 02/08/2022 Inspection Type: Bioassay Compliance
Permit
Yes
No
NA
NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new
0
❑
❑
❑
application?
Is the facility as described in the permit?
M
❑
❑
❑
# Are there any special conditions for the permit?
0
❑
❑
❑
Is access to the plant site restricted to the general public?
0
❑
❑
❑
Is the inspector granted access to all areas for inspection?
0
❑
❑
❑
Comment: The current permit was set to expire on November 30, 2021. A renewal application has
been submitted and the current Dermit will remain effective until a new Dermit is issued.
Laboratory
Yes
No
NA
NE
Are field parameters performed by certified personnel or laboratory?
0
❑
❑
❑
Are all other parameters(excluding field parameters) performed by a certified lab?
0
❑
❑
❑
# Is the facility using a contract lab?
0
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0
0
❑
❑
❑
degrees Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
❑
❑
0
❑
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
❑
❑
0
❑
Comment: Envirolink is field parameter certified with all other samples sent to a contract lab
Bar Screens
Type of bar screen
a.Manual
b.Mechanical
Are the bars adequately screening debris?
Is the screen free of excessive debris?
Is disposal of screening in compliance?
Is the unit in good condition?
Comment: Grit is disposed of in the landfill
Pump Station - Influent
Is the pump wet well free of bypass lines or structures?
Is the wet well free of excessive grease?
Are all pumps present?
Are all pumps operable?
Yes No NA NE
El
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Yes No NA NE
■ ❑ ❑ ❑
❑ ■ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Page# 4

Permit: NCO026042
Inspection Date: 02/08/2022
Owner -Facility: Robersonville WWTP
Inspection Type: Bioassay Compliance
Pump Station - Influent
Yes
No
NA
NE
Are float controls operable?
0
❑
❑
❑
Is SCADA telemetry available and operational?
❑
❑
❑
Is audible and visual alarm available and operational?
❑
❑
❑
Comment: On the day of inspection a small amount of grease was in the lift station.
Grit Removal Yes No NA NE
Type of grit removal
a.Manual
❑
b.Mechanical
Is the grit free of excessive organic matter?
0 ❑
❑
❑
Is the grit free of excessive odor?
■ ❑
❑
❑
# Is disposal of grit in compliance?
0 ❑
❑
❑
Comment: Grease in the wastewater is mixing
with the grit which is causing the grit to bond
together. The ORC stated that they
have to keep breaking up grit on the bottom to
help remove it from the system.
Influent Sampling
Yes
No
NA
NE
# Is composite sampling flow proportional?
❑
0
❑
❑
Is sample collected above side streams?
0
❑
❑
❑
Is proper volume collected?
■
❑
❑
❑
Is the tubing clean?
0
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0
0
❑
❑
❑
degrees Celsius)?
Is sampling performed according to the permit?
0
❑
❑
❑
Comment: Influent sampler is on constant time and constant volume with a sample taken every 8
minutes. The sampler temperature was 4 degrees on the day of inspection.
Equalization Basins
Is the basin aerated?
Is the basin free of bypass lines or structures to the natural environment?
Is the basin free of excessive grease?
Are all pumps present?
Are all pumps operable?
Are float controls operable?
Are audible and visual alarms operable?
Yes No NA NE
❑ ■ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
❑ ❑ ■ ❑
❑ ❑ ■ ❑
❑ ❑ ■ ❑
❑ ❑ ■ ❑
Page# 5

Permit: NCO026042
Inspection Date: 02/08/2022
Equalization Basins
# Is basin size/volume adequate?
Owner -Facility: Robersonville WWTP
Inspection Type: Bioassay Compliance
Yes No NA NE
■ ❑ ❑ ❑
Comment: The "equalization basin" is a anerobic and anoxic zone. On the day of inspection the
mixers were off and there was an excessive amount of solids and vegetation on the to
of the basin. The ORC stated that the mixers were off because with all the solids and
vegetation the mixers will plug. With the mixers not running the basin is acting as a
settling basin and this is not the intent of this basin. The ORC stated that the basin will
be cleaned out in March 2022
Oxidation Ditches
Yes
No
NA
NE
Are the aerators operational?
0
❑
❑
❑
Are the aerators free of excessive solids build up?
■
❑
❑
❑
# Is the foam the proper color for the treatment process?
0
❑
❑
❑
Does the foam cover less than 25% of the basin's surface?
■
❑
❑
❑
Is the DO level acceptable?
0
❑
❑
❑
Are settleometer results acceptable (> 30 minutes)?
❑
❑
❑
■
Is the DO level acceptable?(1.0 to 3.0 mg/1)
❑
❑
❑
Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes)
❑
❑
❑
Comment:
Pumps-RAS-WAS
Yes
No
NA
NE
Are pumps in place?
0
❑
❑
❑
Are pumps operational?
0
❑
❑
❑
Are there adequate spare parts and supplies on site?
■
❑
❑
❑
Comment:
Aerobic Digester
Yes
No
NA
NE
Is the capacity adequate?
❑
■
❑
❑
Is the mixing adequate?
0
❑
❑
❑
Is the site free of excessive foaming in the tank?
0
❑
❑
❑
# Is the odor acceptable?
0
❑
❑
❑
# Is tankage available for properly waste sludge?
❑
0
❑
❑
Comment: On the day of inspection the digester was almost full.
The ORC stated that the sludge
will be land applied in March 2022.
Secondary Clarifier Yes No NA NE
Page# 6

Permit: NCO026042
Inspection Date: 02/08/2022
Owner -Facility: Robersonville WWTP
Inspection Type: Bioassay Compliance
Secondary Clarifier
Is the clarifier free of black and odorous wastewater?
Is the site free of excessive buildup of solids in center well of circular clarifier?
Are weirs level?
Is the site free of weir blockage?
Is the site free of evidence of short-circuiting?
Is scum removal adequate?
Is the site free of excessive floating sludge?
Is the drive unit operational?
Is the return rate acceptable (low turbulence)?
Is the overflow clear of excessive solids/pin floc?
Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth)
Yes
No
NA
NE
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
❑
■
❑
❑
•
❑
❑
❑
•
❑
❑
❑
❑
❑
❑
■
Comment: On the day of inspection the #5 Clarifier and #6 Clarifiers needed repairs. The #5
Clarifier arm was not working and the clarifier was online. ORC stated that a shear pin
had broken and they are working to have this repaired. The #6 Clarifier was down and
was not operational. James stated that the gear box for the clarifier arm was damaged
and that the gear box had to be rebuilt. The estimate for replacing the gear box was
approximately $70,000 and they are going to bring this to the Town Council for
approval.
Filtration (High Rate Tertiary)
Yes
No
NA NE
Type of operation:
Is the filter media present?
❑
❑
❑
Is the filter surface free of clogging?
❑
❑
❑
Is the filter free of growth?
❑
❑
❑
Is the air scour operational?
❑
❑
❑
Is the scouring acceptable?
❑
❑
❑
Is the clear well free of excessive solids and filter media?
M
❑
❑
❑
Comment: The facility uses a Disc Filter for Tertiary treatment
Chemical Feed
Yes
No
NA NE
Is containment adequate?
0
❑
❑ ❑
Is storage adequate?
■
❑
❑ ❑
Are backup pumps available?
■
❑
❑ ❑
Is the site free of excessive leaking?
0
❑
❑ ❑
Comment:
Page# 7

Permit: NCO026042
Inspection Date: 02/08/2022
Disinfection -Gas
Are cylinders secured adequately?
Owner -Facility: Robersonville WWTP
Inspection Type: Bioassay Compliance
Are cylinders protected from direct sunlight?
Is there adequate reserve supply of disinfectant?
Is the level of chlorine residual acceptable?
Is the contact chamber free of growth, or sludge buildup?
Is there chlorine residual prior to de -chlorination?
Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No.
7782-50-5)?
If yes, then is there a Risk Management Plan on site?
If yes, then what is the EPA twelve digit ID Number? (1000- - )
If yes, then when was the RMP last updated?
Comment:
De -chlorination
Type of system ?
Is the feed ratio proportional to chlorine amount (1 to 1)?
Is storage appropriate for cylinders?
# Is de -chlorination substance stored away from chlorine containers?
Are the tablets the proper size and type?
Comment: Sodium Sulfite is used for dechlor
Are tablet de -chlorinators operational?
Number of tubes in use?
Comment:
Flow Measurement - Effluent
# Is flow meter used for reporting?
Is flow meter calibrated annually?
Is the flow meter operational?
(If units are separated) Does the chart recorder match the flow meter?
Yes No NA NE
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
❑ ❑ ■ ❑
❑ ❑ ■ ❑
Yes No NA NE
Liquid
■ ❑
❑
❑
❑ ❑
■
❑
■ ❑
❑
❑
❑ ❑
■
❑
❑ ❑ ■ ❑
Yes No NA NE
■ ❑ ❑ ❑
❑ ❑ ❑
■ ❑ ❑ ❑
❑ ❑ ■ ❑
Comment: Effluent flow meter was calibrated on March 9, 2021 by Carolina Technical Services
Effluent Sampling
Is composite sampling flow proportional?
Yes No NA NE
❑ ■ ❑ ❑
Page# 8

Permit: NCO026042 Owner -Facility: Robersonville WWTP
Inspection Date: 02/08/2022 Inspection Type: Bioassay Compliance
Effluent Sampling Yes No NA NE
Is sample collected below all treatment units?
0
❑
❑
❑
Is proper volume collected?
■
❑
❑
❑
Is the tubing clean?
0
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0
0
❑
❑
❑
degrees Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type
0
❑
❑
❑
representative)?
Comment: Effluent sampler is on constant time and constant volume with a sample taken every 7
minutes. The sampler temperature on the day of inspection was 3 degrees.
Effluent Pipe
Yes
No
NA
NE
Is right of way to the outfall properly maintained?
M
❑
❑
❑
Are the receiving water free of foam other than trace amounts and other debris?
■
❑
❑
❑
If effluent (diffuser pipes are required) are they operating properly?
❑
❑
0
❑
Comment:
Upstream / Downstream Sampling
Is the facility sampling performed as required by the permit (frequency, sampling type,
and sampling location)?
Comment:
Yes No NA NE
■ ❑ ❑ ❑
Page# 9

United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 IN 2 u 3 I NCO026042 111 121 22/08/08 I17 18 U 19 I s I 201
211IIIII 111111III II III III1 I I IIIII IIIIIIIII II r6
Inspection
Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved -------------------
67
I 72 I n, I 73 � I 74 79 I I I I I I I80
70 I I 71 I LL -1 I I
LJ
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES permit Number)
08:OOAM 22/08/08
17/05/01
Robersonville WWTP
1149 Rogerson Rd
Exit Time/Date
Permit Expiration Date
Robersonville NC 27871
08:OOAM 22/08/08
21/11/30
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
James Earl Pittman/ORC/252-235-4900/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Elizabeth Jenkins,PO Box 487 Robersonville NC 278710487//252-508-0311/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Pretreatment
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Robert E Bullock DWR/WARO WQ/252-948-3843/
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#

NPDES yr/mo/day Inspection Type
NCO026042 I11 12I 22/08/08 117 18 IRI
(Cont.)
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
The Town of Robersonville responded to Civil Penalty assessment LV-2022-0036 stating that the
violations at the Wastewater treatment plant were caused by Flagstone Foods.
During the onsite inspection on February 8, 2022 the November 24, 2021 sampling results from
Flagstone Foods was reviewed. The results are as follows:
BOD - 17,080 mg/I
COD - 20,000 mg/I
Total Suspended Residue - 15,536 mg/I
Ammonia Nitrogen as N - 0.34 mg/I
Total Kjeldahl Nitrogen - 19.44 mg/I
Oil & Grease - 8990 mg/I
Chloride - 1130 mg/I
Total Dissolved Residue - 5800 mg/I
Calcium - 5413 ug/I
Copper - 98 ug/I
Magnesium - 2993 ug/I
Selenium - <10 ug/I
Sodium - 1619600 ug/I
Zinc - 283 ug/I
A Pretreatment Notice was mailed on February 17, 2022 and received on March 1, 2022 informed the
Town of Robersonville that a Pretreatment Program is required and a response was requested within
90 days on how the Town plans to move forward with establishing a Pretreatment Program. To date
the Town has not submitted a timeline of how the Town plans to move forward with establishing a
Pretreatment Program.
Page#

Permit: NC0026042
Inspection Date: 08/08/2022
Owner -Facility: Robersonville WWTP
Inspection Type: Reconnaissance
Yes No NA NE
Page#

United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 IN 1 2 u 3 I NCO026042 I11 121 22/09/01 I17 18 U 19 I s I 201 I
211IIIII 111111III II III III1 I I IIIII IIIIIIIII II r6
Inspection
Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved -------------------
67
I 72 I n, I 71 I 74 79 I I I I I I I80
70I I 71 I LL -1 I I
LJ
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES permit Number)
09:30AM 22/09/01
17/05/01
Robersonville WWTP
1149 Rogerson Rd
Exit Time/Date
Permit Expiration Date
Robersonville NC 27871
10:30AM 22/09/01
21/11/30
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Elizabeth Jenkins,PO Box 487 Robersonville NC 278710487//252-508-0311/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit 0 Operations & Maintenar Records/Reports Self -Monitoring Progran
Sludge Handling Dispo: 0 Facility Site Review Other
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Robert E Bullock DWR/WARO WQ/252-948-3843/
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#

NPDES yr/mo/day Inspection Type
NCO026042 I11 12I 22/09/01 117 18 IRI
(Cont.)
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
On September 1, 2022 Robbie Bullock (DWR) went to Robersonville WWTP to follow up on issues
noted in the February 8, 2022 Compliance inspection. On the day of inspection Josh Powers and
Tracy Miller with Envirolink were onsite. James Pittman is the ORC and is currently out on medical
leave. Tony Lucas is the Backup ORC and we were informed during the inspection that Tony is no
longer employed with Envirolink. The Town of Robersonville needs to designate an ORC and Backup
ORC for the Wastewater Treatment Plant.
In the February 8, 2022 inspection it was noted that all of the mixers in the Anaerobic and Anoxic zone
were not in operation. On the day of inspection only 2 of the 6 mixers were on. Tracy was not sure if
the mixers that were off were operational. All mixers need to be operational and running to prevent
the solids from settling out in the Anaerobic and Anoxic zones.
The #6 Clarifier was not operational during the February 8, 2022 Compliance inspection due to
damage in the gear box. As of September 1, 2022 the #6 Clarifier has not been repaired.
In the February 8, 2022 inspection it was noted that the sludge digesters were full and the ORC
stated that sludge will be land applied in March 2022. On September 1, 2022 it was noted that both
digesters are full. The facility did not know if sludge had been applied in March 2022 and the
digesters were full again or if the Sludge had not been applied.
Page#

Permit: NCO026042
Inspection Date: 09/01/2022
Owner -Facility: Robersonville WWTP
Inspection Type: Reconnaissance
Permit
(If the present permit expires in 6 months or less). Has the permittee submitted a new
application?
Is the facility as described in the permit?
# Are there any special conditions for the permit?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Comment:
Other
Comment:
Yes No NA NE
❑ ❑ ❑ ■
❑ ❑ ❑ ■
❑ ❑ ❑ ■
❑ ❑ ❑ ■
❑ ❑ ❑ ■
Yes No NA NE
Is the plant generally clean with acceptable housekeeping? ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment:
Aerobic Digester
Yes
No
NA NE
Is the capacity adequate?
❑
■
❑
❑
Is the mixing adequate?
❑
0
❑
❑
Is the site free of excessive foaming in the tank?
0
❑
❑
❑
# Is the odor acceptable?
0
❑
❑
❑
# Is tankage available for properly waste sludge?
❑
■
❑
❑
Comment: In the February 8, 2022 inspection it was noted that the sludge digesters were full and
the ORC stated that sludge will be land applied in March 2022. On September
1,
2022
it was noted that both digesters are full. The facility did not know if sludge
was applied
in March 2022.
Equalization Basins
Yes
No
NA NE
Is the basin aerated?
❑
0
❑
❑
Is the basin free of bypass lines or structures to the natural environment?
0
❑
❑
❑
Is the basin free of excessive grease?
0
❑
❑
❑
Are all pumps present?
❑
❑
■
❑
Are all pumps operable?
❑
❑
0
❑
Are float controls operable?
❑
❑
0
❑
Are audible and visual alarms operable?
❑
❑
0
❑
Page# 3

Permit: NCO026042
Inspection Date: 09/01/2022
Equalization Basins
# Is basin size/volume adequate?
Owner -Facility: Robersonville WWTP
Inspection Type: Reconnaissance
Comment: The "Equalization Basin" is actually a Anaerobic and Anoxic.
Yes No NA NE
❑ ❑ ■ ❑
In the February 8, 2022 inspection it was noted that all of the mixers in the Anaerobic
and Anoxic zone were not in operation. On September 1, 2022 only 2 of the 6 mixers
were on. Tracy was not sure if the mixers that were off were operational. All mixers
need to be operational and running to prevent solids from settling out in the Anaerobic
and Anoxic zones.
Secondary Clarifier
Is the clarifier free of black and odorous wastewater?
Is the site free of excessive buildup of solids in center well of circular clarifier?
Are weirs level?
Is the site free of weir blockage?
Is the site free of evidence of short-circuiting?
Is scum removal adequate?
Is the site free of excessive floating sludge?
Is the drive unit operational?
Is the return rate acceptable (low turbulence)?
Is the overflow clear of excessive solids/pin floc?
Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth)
Yes
No
NA NE
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
•
❑
❑
❑
❑
■
❑
❑
■
❑
❑
❑
❑
■
❑
❑
❑
❑
❑
■
Comment: The #6 Clarifier was not operational during the February 8, 2022 Compliance
inspection due to damage in the pear box. As of September 1, 2022 the #6 Clarifier
has not been repaired.
Page# 4

NH3/TRC WLA Calculations
Robersonville WWTP
Permit No. NC0026042
Prepared By: Gary Perlmutter
Enter Design Flow (MGD): 1.8
Enter s7Q10 (cfs): 0.27
Enter w7Q10 (cfs): 0.73
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS) 0.27
s7Q10 (CFS)
0.27
DESIGN FLOW (MGD) 1.8
DESIGN FLOW (MGD)
1.8
DESIGN FLOW (CFS) 2.79
DESIGN FLOW (CFS)
2.79
STREAM STD (UG/L) 17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1) 0
Upstream Bkgd (mg/1)
0.22
IWC (%) 91.18
IWC (%)
91.18
Allowable Conc. (ug/1) 19
Allowable Conc. (mg/1)
1.1
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Fecal Coliform
w7Q10 (CFS)
0.73
Monthly Average Limit: 200/100ml
DESIGN FLOW (MGD)
1.8
(If DF >331; Monitor)
DESIGN FLOW (CFS)
2.79
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF) 1.10
Upstream Bkgd (mg/1)
0.22
IWC (%)
79.26
Allowable Conc. (mg/1)
2.2
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/l, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis);
capped at 35 mg/I
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Table 1. Project Information
❑ CHECK IF HQW OR ORW WQS
Facility Name
Robersonville WWTP
WWTP/WTP Class
Grade IV
NPDES Permit
NCO026042
Outfal I
001
Flow, Qw (MGD)
1.800
Receiving Stream
Flat Swamp
HUC Number
03020103
Stream Class
❑ Apply WS Hardness WQC
C, Sw, NSW
7Q10s (cfs)
0.27
7Q10w (cfs)
0.73
30Q2 (cfs)
18.00
QA (cfs)
1 Q10s (cfs)
Effluent Hardness
27.27 mg/L (Avg)
Upstream Hardness
- - - - - - - - - - - - -
47.93 mg/L (Avg)
- - - - - - - - - - - - - - - -
Combined Hardness Chronic
29.09 mg/L
Combined Hardness Acute
28.84 m /L
Data from Permittee-submitted DMRs (Hardness and
Copper) and PPAs (all other).
Data Source(s)
❑ CHECK TO APPLY MODEL
REQUIRED DATA ENTRY
Par01
Par02
Par03
Par04
Par05
Par06E
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name WQs Type Chronic Modifier Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HH/WS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.6615
FW
3.6702
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
133.2868
FW
1017.4527
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
8.9699
FW
11.9812
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
3.4881
FW
88.6484
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
42.3229
FW
378.2834
pg/L
Nickel
water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
0.3790
ug/L
Zinc
Aquatic Life
NC
144.0934
FW
141.8848
ug/L
Chloroform
Human Health
NC
2000
HH
pg/L
Dichlorobromomethane
Human Health
C
27
HH
pg/L
26042 Freshwater RPA 2022, input
4/21 /2023

26042 Freshwater RPA 2022, input
4/21 /2023

REASONABLE POTENTIAL ANALYSIS
H1
Date Data
1 11 /7/2018
2 2/6/2019
3 4/3/2019
4 7/10/2019
5 10/2/2019
6 1 /8/2020
7 4/1/2020
8 10/7/2020
9 1 /6/2021
10 4/7/2021
11 7/7/2021
12 10/6/2021
13 1 /5/2022
14 4/6/2022
15 7/6/2022
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Effluent Hardness I
BDL=1/2DL
Results
60
60
Std Dev.
24
24
Mean
20
20
C.V.
32
32
n
28
28
10th Per value
32
32
Average Value
25
25
Max. Value
24
24
20
20
20
20
24
24
28
28
20
20
24
24
28
28
Use "PASTE SPECIAL
Values" then "COPY'
Maximum data points
= 58
9.9173
27.2667
0.3637
15
20.00 mg/L
27.27 mg/L
60.00 mg/L
H2
Date
1 11 /7/2018
2 2/13/2019
3 4/3/2019
4 7/10/2019
5 1 /8/2020
6 4/1/2020
7 10/7/2020
8 1 /6/2021
9 4/7/2021
10 7/7/2021
11 10/6/2021
12 1 /5/2022
13 4/6/2022
14 7/6/2022
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Upstream Hardness
Data
BDL=1/2DL
Results
80
80
Std Dev.
39
39
Mean
40
40
C.V.
52
52
n
64
64
10th Per value
28
28
Average Value
56
56
Max. Value
28
28
44
44
44
44
52
52
60
60
52
52
32
32
Use "PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
14.5943
47.9286
0.3045
14
29.20 mg/L
47.93 mg/L
80.00 mg/L
26042 Freshwater RPA 2022, data
-3- 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
Par01 & Par02
Date Data
1 5/25/2017 <
2 11/19/2019 <
3 3/28/2023 <
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Par03
Use "PASTE SPECIAL
Use "PASTE SPECIAL
Arsenic
Values" then "COPY".
Beryllium
Values" then "COPY".
Maximum data points
Maximum data points
= 58
= 58
BDL=1/2DL Results
Date Data
BDL=1/2DL
Results
5 2.5 Std Dev.
0.8660
1
5/25/2017 <
1 0.5
Std Dev.
0.1443
2 1 Mean
1.5000
2
11/19/2019 <
0.5 0.25
Mean
0.3333
2 1 C.V. (default)
0.6000
3
3/28/2023 <
0.5 0.25
C.V. (default)
0.6000
n
3
4
n
3
5
Mult Factor =
3.00
6
Mult Factor =
3.00
Max. Value
2.5 ug/L
7
Max. Value
0.50 ug/L
Max. Pred Cw
7.5 ug/L
8
Max. Pred Cw
1.50 ug/L
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
26042 Freshwater RPA 2022, data
-4- 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
26042 Freshwater RPA 2022, data
- 5 - 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
Par06 Par07
Use "PASTE SPECIAL.
Chlorinated Phenolic Compounds Values" then "COPY".
Maximum data points
= 58
Total Phenolic Compounds
Date Data
BDL=1/2DL Results
Date Data
1
Std Dev.
NO DATA
1
5/25/2017 <
2
Mean
NO DATA
2
11/19/2019
3
C.V.
NO DATA
3
3/28/2023 <
4
n
0
4
5
5
6
Mult Factor =
N/A
6
7
Max. Value
N/A ug/L
7
8
Max. Pred Cw
N/A ug/L
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
46
46
47
47
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
BDL=1/2DL
Results
5 2.5
Std Dev.
11 11
Mean
10 5
C.V. (default)
n
Mult Factor =
Max. Value
Max. Pred Cw
Use "PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
4.3684
6.1667
0.6000
3
3.00
11.0 ug/L
33.0 ug/L
26042 Freshwater RPA 2022, data
-6- 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
-7-
26042 Freshwater RPA 2022, data
4/21 /2023

REASONABLE POTENTIAL ANALYSIS
Par10
Date Data
1 5/25/2017 <
2 11/19/2019 <
3 3/28/2023 <
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Chromium, Total
BDL=1/2DL
Results
5 2.5
Std Dev.
2 1
Mean
2 1
C.V. (default)
n
Mult Factor =
Max. Value
Max. Pred Cw
Pal
Use "PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
Date
0.8660
1
1 /8/2020
1.5000
2
2/5/2020
0.6000
3
3/4/2020
3
4
4/1/2020
5
5/6/2020
3.00
6
6/3/2020
2.5 pg/L
7
7/8/2020
7.5 fag/L
8
8/5/2020
9
9/16/2020
10
10/7/2020
11
11 /4/2020
12
12/2/2020
13
12/3/2020
14
12/9/2020
15
1 /6/2021
16
2/3/2021
17
3/3/2021
18
4/7/2021
19
5/5/2021
20
6/2/2021
21
6/28/2021
22
6/30/2021
23
7/7/2021
24
7/28/2021
25
7/29/2021
26
7/30/2021
27
8/4/2021
28
9/1/2021
29
10/6/2021
30
10/28/2021
31
11 /3/2021
32
12/8/2021
33
1 /5/2022
34
2/9/2022
35
3/2/2022
36
4/6/2022
37
5/4/2022
38
6/8/2022
39
7/6/2022
40
8/3/2022
41
9/7/2022
42
10/5/2022
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Copper
Data
BDL=1/2DL
Results
19
19
Std Dev.
9
9
Mean
7
7
C.V.
6
6
n
10
10
5
5
Mult Factor =
11
11
Max. Value
7
7
Max. Pred Cw
8
8
5
5
10
10
10
10
13
13
13
13
9
9
8
8
10
10
4
4
9
9
16
16
9
9
6
6
18
18
13
13
13
13
14
14
22
22
12
12
18
18
20
20
25
25
23
23
11
11
7
7
5
5
7
7
6
6
11
11
14
14
27
27
11
11
Use "PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
5.7707
11.7317
0.4919
41
1.08
27.00 ug/L
29.16 ug/L
26042 Freshwater RPA 2022, data
-8- 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
26042 Freshwater RPA 2022, data
4/21 /2023

REASONABLE POTENTIAL ANALYSIS
-10-
26042 Freshwater RPA 2022, data
4/21 /2023

REASONABLE POTENTIAL ANALYSIS
26042 Freshwater RPA 2022, data
- 11 - 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
Par19
Date Data
1 5/25/2017 <
2 11/19/2019 <
3 3/28/2023 <
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Par20
Use "PASTE SPECIAL
Use "PASTE SPECIAL
Selenium
Values" then "COPY".
Silver
Values" then "COPY".
Maximum data points
Maximum data points
= 58
= 58
BDL=1/2DL
Results
Date Data
BDL=1/2DL
Results
10 5
Std Dev.
2.5981
1
5/25/2017 <
5 2.5
Std Dev.
1.2990
1 0.5
Mean
2.0000
2
11/19/2019 <
0.5 0.25
Mean
1.0000
1 0.5
C.V. (default)
0.6000
3
3/28/2023 <
0.5 0.25
C.V. (default)
0.6000
n
3
4
n
3
5
Mult Factor =
3.00
6
Mult Factor =
3.00
Max. Value
5.0 ug/L
7
Max. Value
2.500 ug/L
Max. Pred Cw
15.0 ug/L
8
Max. Pred Cw
7.500 ug/L
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
26042 Freshwater RPA 2022, data
- 12 - 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
Par21
Date Data
1 5/25/2017
2 11/19/2019
3 3/28/2023
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Par22
Use "PASTE SPECIAL
Use "PASTE SPECIAL
Zinc
Values" then "COPY".
Chloroform
Values" then "COPY".
Maximum data points
Maximum data points
= 58
= 58
BDL=1/2DL
Results
Date Data
BDL=1/2DL
Results
28 28
Std Dev.
5.5076
1
5/25/2017 <
5 2.5
Std Dev.
3.5670
18 18
Mean
24.3333
2
11/19/2019
9.54 9.54
Mean
5.6867
27 27
C.V. (default)
0.6000
3
3/28/2023
5.02 5.02
C.V. (default)
0.6000
n
3
4
n
3
5
Mult Factor =
3.00
6
Mult Factor =
3.00
Max. Value
28.0 ug/L
7
Max. Value
9.540000 Ng/L
Max. Pred Cw
84.0 ug/L
8
Max. Pred Cw
28.620000 Ng/L
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
26042 Freshwater RPA 2022, data
- 13 - 4/21 /2023

REASONABLE POTENTIAL ANALYSIS
26042 Freshwater RPA 2022, data
- 14 - 4/21 /2023

Robersonville WWTP
Outfall 001
NCO026042 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MGD) =
1.8000
1Ql0S (cfs) =
0.23
7Q10S (cfs) =
0.27
7Q10W (cfs) =
0.73
30Q2 (cfs) =
NO 30Q2 DATA
Avg. Stream Flow, QA (cfs) =
18.00
Receiving Stream: Flat Swamp HUC 03020103
WWTP/WTP Class: Grade IV
IWC% @ 1Q10S =
92.38410596
IWC% @ 7Q10S =
91.17647059
IWC% @ 7Q10W =
79.26136364
IWC% @ 30Q2 =
N/A
IW%C @ QA =
13.41991342
Stream Class: C, Sw, NSW
Qw = 1.8 MGD
COMBINED HARDNESS (mg/L)
Acute = 28.84 mg/L
Chronic = 29.09 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
J
Applied
Chronic Acute0.
D
n # Det. Max Pred Cw Allowable Cw
Standard
Acute (FW): 368.0
Arsenic
C
150 FW(7Q10s) 340
ug/L
3 0
7.5
___
Chronic (FW) 164.5
C.V. (default)
Max MDL = 5
Arsenic
C
10 HH/WS(Qavg)
ug/L
Note: n < 9
NO DETECTS
____ _
Chronic (HH) 74.5
_ _ _ _ _ _ _ _ _ _ _ _ _
No detects; no monitoring or limits required
Limited data set
Max MDL = 5
Acute: 70.36
Beryllium
NC
6.5 FW(7Q10s) 65
ug/L
3 0
1.50
___ _ ______ ____
_ _ _ _ _ _ _ _ _ ______
Note: n < 9
C.V. (default)
Chronic: 7.13
No detects; no monitoring or limits required
Limited data set
NO DETECTS
Max MDL = 1
Acute: 3.973
Cadmium
NC
0.6615 FW(7Q10s) 3.6702
ug/L
3 0
1.500
Note: n < 9
C.V. (default)
___ _ ______ _ _
Chronic: 0.726
___________________________
No detects; no monitoring or limits required
Limited data set
NO DETECTS
Max MDL = 1
Acute: NO WQS
Chlorides
NC
230 FW(7Q10s)
mg/L
0 0
N/A
----
-_ _ ----- —_ -- _
Chronic:
---------------------------
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
1 A(30Q2)
ug/L
0 0
N/A
--Chronic: ----IWC?---
---------------------------
Acute: NO WQS
Total Phenolic Compounds
NC
300 A(30Q2)
ug/L
3 1
33.0
____ _ ____
___________________________
Note: n < 9
C.V. (default)
Chronic: IWC?
Limited data set
Acute: 1,101.3
Chromium III
NC
133.2868 FW(7Q10s) 1017.4527
µg/L
0 0
N/A
----
-_ _ ----- —_ -- _
Chronic:
---------------------------
Acute: 17.3
Chromium VI
NC
11 FW(7Q10s) 16
µg/L
0 0
N/A
-_ _ ----- _ - _
-Chronic: ---
---------------------------
Chromium, Total
NC
µg/L
3 0
7.5
Max reported value = 2.5
No detects; no monitoring or limits required
Note: n < 9
C.V. (default)
Limited data set
NO DETECTS
Max MDL = 5
26042 Freshwater RPA 2022, rpa
Page 15 of 16 4/21/2023

Robersonville WWTP
Outfall 001
NCO026042
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
Qw = 1.8 MGD
Acute: 12.97
Copper
NC
8.9699 FW(7Q10s) 11.9812
ug/L
41 41
29.16
-_ _ ----- _ _ ---
-Chronic:
---------------------------
9.84
RP shown - apply Monthly Monitoring with Limit
24 values > Allowable Cw
Acute: 23.8
Cyanide
NC
5 FW(7Q10s) 22
10
ug/L
3 0
15.0
___ _ ___________
_ _ _ _ _ _ _ _ _ ______
Note: n < 9
C.V. (default)
Chronic: 5.5
No detects; no monitoring or limits required
Limited data set
NO DETECTS
Max MDL = 10
Acute: NO WQS
Fluoride
NC
1800 FW(7Q10s)
ug/L
0 0
N/A
-_ _ ---- _ _
-Ch--
Chronic: 1,974.2
---------------------------
Acute: 95.956
Lead
NC
3.4881 FW(7Q10s) 88.6484
ug/L
3 1
7.500
Note: n <_ 9
C.V. (default)
_ _ _ _ _ _ _ _ _ _
Chronic: 3.826
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
RP for Limited Dataset (n<8 samples) - apply
Limited data set
No value > Allowable Cw
Quarterly Monitoring
Acute: NO WQS
Mercury
NC
12 FW(7Q10s)
0.5
ng/L
0 0
N/A
--Chronic: ----- ---
---------------------------
13.2
Acute: NO WQS
Molybdenum
NC
2000 HH(7QIOs)
ug/L
0 0
N/A
-_ _ ---_ _
-Chronic:-2--
---------------------------
,193.5
Acute (FW): 409.5
Nickel
NC
42.3229 FW(7Q10s) 378.2834
µg/L
3 2
15.0
_ _ _ _ _ _ _ _ _ _ _ _
Chronic (FW) 46.4
_ _ _ _ _ _ _ _ _ _ _ _ _ _
No RP for Limited Dataset (N<8 samples) - no
Note: n < 9
C.V. (default)
N_o value > Allowable Cw
monitoring or limits required
Nickel
NC
25.0000 WS(7Q10s)
µg/L
Limited data set
Chronic (WS) 27.4
No value > Allowable Cw
Acute: 60.6
Selenium
NC
5 FW(7Q10s) 56
ug/L
3 0
15.0
Note: n < 9
C.V. (default)
___ _ ___________
Chronic: 5.5
_ _ _ _ _ _ _ _ _ ______
No detects; no monitoring or limits required
Limited data set
NO DETECTS
Max MDL = 10
Acute: 0.410
Silver
NC
0.06 FW(7Q10s) 0.3790
ug/L
3 0
7.500
Note: n < 9
C.V. (default)
___ _ ______ _ _
Chronic: 0.066
__________________________
No detects; no monitoring or limits required
Limited data set
NO DETECTS
Max MDL = 5
Acute: 153.6
Zinc
NC
144.0934 FW(7Q 1 Os) 141.8848
ug/L
3 3
84.0
Note: n <_ 9
C.V. (default)
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Chronic: 158.0
_ _ _ _ _ _ _ _ _ _ _ _ _ _
No RP for Limited Dataset (N<8 samples) - no
Limited data set
No value > Allowable Cw
monitoring or limits required
Acute: NO WQS
Chloroform
NC
2000 HH(7Q 1 Os)
µg/L
3 2
28.62000
Note: n < 9
C.V. (default)
Chronic: 2193.54839
No RP for Limited Dataset (N<8 samples) - no
Limited data set
No value > Allowable Cw
monitoring or limits required
Acute: NO WQS
Dichlorobromomethane
C
27 HH(Qavg)
µg/L
3 1
7.50000
Note: n < 9
C.V. (default)
_ _ _ _ _ _ _ _ _ _ _ _
Chronic: 201.19355
_ _ _ _ _ _ _ _ _ _ _ _ _ _
No RP for Limited Dataset (N<8 samples) - no
Limited data set
No value > Allowable Cw
monitoring or limits required
26042 Freshwater RPA 2022, rpa
Page 16 of 16 4/21/2023

Permit No. NC0026042
NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards
The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently
approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft
permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as
approved.
Table 1. NC Dissolved Metals Water Q ality Standards/A uatic Life Protection
Parameter
Acute FW, µg/1
(Dissolved)
Chronic FW, µg/l
(Dissolved)
Acute SW, µg/l
(Dissolved)
Chronic SW, µg/l
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life
standards for Mercury and selenium are still expressed as Total Recoverable Metals due to
bioaccumulative concerns (as are all human health standards for all metals). It is still necessary
to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC
213.0200 (e.g., arsenic at 10 µg/l for human health protection; cyanide at 5 µg/L and fluoride at
1.8 mg/L for aquatic life protection).
Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/I
Cadmium, Acute
WER*{1.136672-[ln hardness](0.041838)} e^{0.9151 [In hardness]-3.1485{
Cadmium, Acute Trout waters
WER*{1.136672-[ln hardness](0.041838)} e^{0.9151[In hardness]-3.6236}
Cadmium, Chronic
WER*{1.101672-[ln hardness](0.041838)} e^{0.7998[ln hardness]-4.4451}
Chromium III, Acute
WER*0.316 e^{0.8190[ln hardness]+3.7256}
Chromium III, Chronic
WER*0.860 e^{0.8190[ln hardness]+0.6848}
Copper, Acute
WER*0.960 e^{0.9422[ln hardness]-1.700}
Copper, Chronic
WER*0.960 e^{0.8545[ln hardness]-1.702}
Lead, Acute
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-1.4601
Lead, Chronic
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-4.705}
Nickel, Acute
WER*0.998 e^{0.8460[ln hardness]+2.255}
Nickel, Chronic
WER*0.997 e^{0.8460[ln hardness]+0.0584}
Page 1 of 4

Permit No. NCO026042
Silver, Acute
WER*0.85 • e^{1.72[ln hardness]-6.59)
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 e^{0.8473[ln hardness]+0.884)
Zinc, Chronic
WER*0.986 e^{0.8473[ln hardness]+0.884)
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However, application of
the dissolved and hardness -dependent standards requires additional consideration in order to establish the
numeric standard for each metal of concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness
and so must be calculated case -by -case for each discharge.
Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The
discharge -specific standards must be converted to the equivalent total values for use in the RPA
calculations. We will generally rely on default translator values developed for each metal (more on that
below), but it is also possible to consider case -specific translators developed in accordance with
established methodology.
RPA Permitting Guidance/WQBELs for Hardness -Dependent Metals - Freshwater
The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern,
based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable
standards and the critical low -flow values for the receiving stream.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the
discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If
monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below
detection level), then the Division may remove the monitoring requirement in the reissued permit.
To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q 10 (the spreadsheet automatically calculates
the 1 Q 10 using the formula 1 Q 10 = 0.843 (s7Q 10, cfs) 0.993
• Effluent hardness and upstream hardness, site -specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness -dependent metal of concern and for
each individual discharge, the Permit Writer must first determine what effluent and instream
(upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any
hardness data and contacts the Permittee to see if any additional data is available for instream
hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation using a
default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the
hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively.
If the use of a default hardness value results in a hardness -dependent metal showing reasonable
potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and
upstream hardness samples over a period of one week. The RPA is rerun using the new data.
Page 2 of 4

Permit No. NCO026042
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic)
_ (Permitted Flow, cfs *Avg. Effluent Hardness, mg/L) + (s7Q 10, cfs *Avg. Upstream Hardness, mg/L)
(Permitted Flow, cfs + s7Q 10, cfs)
The Combined Hardness for acute is the same but the calculation uses the IQ 10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total recoverable
metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any
have been developed using federally approved methodology.
EPA default partition coefficients or the "Fraction Dissolved" converts the value for
dissolved metal at laboratory conditions to total recoverable metal at in -stream
ambient conditions. This factor is calculated using the linear partition coefficients
found in The Metals Translator: Guidance for Calculating a Total Recoverable
Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the
equation:
Cdiss = 1
Ctotal 1 + { [Kpo] [ss(I+a)] [10-6] }
Where:
ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used,
and
Kpo and a = constants that express the equilibrium relationship between dissolved
and adsorbed forms of metals. A list of constants used for each hardness -dependent
metal can also be found in the RPA program under a sheet labeled DPCs.
4. The numeric standard for each metal of concern is divided by the default partition coefficient (or
site -specific translator) to obtain a Total Recoverable Metal at ambient conditions.
In some cases, where an EPA default partition coefficient translator does not exist (ie. silver), the
dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to
obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is
dissolved to the same extent as it was during EPA's criteria development for metals. For more
information on conversion factors see the June, 1996 EPA Translator Guidance Document.
5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration
(permit limits) for each pollutant using the following equation:
Ca = (s7Q 10 + Qw) (Cwgs)-(s7Q10) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L)
Qw = permitted effluent flow (cfs, match s7Q 10)
s7Q 10 = summer low flow used to protect aquatic life from chronic toxicity and human
health through the consumption of water, fish, and shellfish from noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background concentrations
Flows other than s7Q 10 may be incorporated as applicable:
IQ 10 = used in the equation to protect aquatic life from acute toxicity
Page 3 of 4

Permit No. NC0026042
QA = used in the equation to protect human health through the consumption of water,
fish, and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern.
Data entered must have been taken within four and one-half years prior to the date of the permit
application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper
concentration of each pollutant. The Predicted Max concentrations are compared to the Total
allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds
the acute or chronic Total allowable concentrations, the discharge is considered to show
reasonable potential to violate the water quality standard, and a permit limit (Total allowable
concentration) is included in the permit in accordance with the U.S. EPA Technical Support
Document for Water Quality -Based Toxics Control published in 1991.
7. When appropriate, permit writers develop facility specific compliance schedules in accordance
with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on
40 CFR 122.47 Compliance Schedule Requirements.
The Total Chromium NC WQS was removed and replaced with trivalent chromium and
hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data
results may be used as a conservative surrogate in cases where there are no analytical results
based on chromium III or VI. In these cases, the projected maximum concentration (95th %) for
total chromium will be compared against water quality standards for chromium III and
chromium VI.
9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are
inserted into all permits with facilities monitoring for hardness -dependent metals to ensure the
accuracy of the permit limits and to build a more robust hardness dataset.
10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included:
Parameter
Value
Comments (Data Source)
Average Effluent Hardness, mg/L
27.27
Permittee submitted DMRs
(Total as CaCO3)
Average Upstream Hardness, mg/L
47.93
Permittee submitted DMRs
(Total as CaCO3)
7Q10 summer (cfs)
0.27
Reported in previous permit Fact
Sheet
1Q10 (cfs)
0.23
Calculated in RPA spreadsheet
Permitted Flow (MGD)
1.8
Design flow
Date: April 21, 2023
Permit Writer: Gary Perlmutter
Page 4 of 4

Client:
Attention
NPDES #
MERITECH, INC.
ENVIRONMENTAL LABORATORIES
Laboratory Certification No. 165
Robersonville
PO Box 670
Bailey, NC 27807
James Pittman
NCO026042
Date Sampled 11/20/19
Digested 11/21/19
Analysis 11/27/19
Analyst: C WL
EPA 1631 Low Level Mercury Analysis
Meritech ID # Sample ID Result Reporting Limit
MBLK1127 Method Blank < 0.5 ng/L 0.5 ng/L
M11211901 Field Blank < 1.0 ng/L 1.0 ng/L
M11211902
Effluent
I hereby certify that I have reviewed and approve these data.
Laboratory Repres ive
2.13 ng/L 1.0 ng/L
642 Tamco Rd - PO Box 27 - Reidsville, NC 27320
[phone] Ph - [phone] Fax
E-Mail: [e-mail]

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4/21/23 WQS = 12 ng/L
Facility Name
Robersonville WWTP / NC0026042
/Permit No. :
MERCURY WQBEL/TBEL EVALUATION
No Limit Required
No MMP Required
V:2013-6
Total Mercury 1631E PQL = 0.5 ng/L
Date Modifier Data Entry
Value
7Q10s = 0.270 cfs
Permitted Flow = 1.800
WQBEL = 13.16 ng/L
47 ng/L
11/20/19
2.13
2.13
2.1
ng/L
- Annual Average for 2019
4/5/17
<
1
0.5
3/8/17
<
1
0.5
0.5
ng/L
- Annual Average for 2017
8/3/16
<
1
0.5
7/6/16
1.4
1.4
6/1/16
<
1
0.5
5/4/16
<
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4/6/16
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0.5
3/2/16
1
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2/3/16
<
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1/6/16
<
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0.7
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- Annual Average for 2016
12/2/15
<
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11/4/15
1.7
1.7
10/14/15
<
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9/2/15
<
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<
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1/7/15
1.3
1.3
1.0
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- Annual Average for 2015
3/29/23
1.07
1.07
1.1
ng/L
- Annual Average for 2023

Robersonville WWTP / NCO026042
Mercury Data Statistics (Method 1631E)
2019
2017
2016
2015
2023
# of Samples
1
2
8
10
1
Annual Average, ng/L
2.1
0.5
0.7
1.0
1.1
Maximum Value, ng/L
2.13
0.50
1.40
2.00
1.07
TBEL, ng/L
47
WQBEL, ng/L
13.2

From:
Daniel Sears
To:
Josh Powers; Perlmutter, Gary
Subject:
RE: [External] - Chemical Addendum, Effluent Pollutant Scans for Robersonville WWTP
Date:
Tuesday, March 14, 2023 6:47:03 PM
Attachments:
imaae001.a_na
Chemical-Addendum-to-NPDES-application.xlsx
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Gary,
I have been working on this getting all the information possible to cover all the requirements, and
after several attempts we were able to get the 2017 and 2019 Effluent Pollutant Scans. I need to
mention that there is no reason we have requested the labs for these periods and not for the 2018,
however, the Labs don't have this information, so we decided to fill the Chemical Addendum file
with the 2019 results.
I want to mention that on the link you provide us:
https://deq. nc.gov/a bout/divisions/water-resources/water-q ua I ity_perm itti ng/n pdes-
wastewater/npdes-permitting_process/npdes-individual-permit-applications
Establishes the following:
• Chemical Addendum Form- As required by Session Law 2018-5, Senate Bill 99, Section
13.1(r), every applicant shall now submit documentation of any additional pollutants for
which there are certified methods with the permit application if their discharge is anticipated.
The list of pollutants may be found in 40 CFR Part 136, which is incorporated by reference. If
there are additional pollutants with certified methods to be reported, please submit the
Chemical Addendum to NPDES Application table with your application and, if applicable, list
the selected certified analytical method used. If there are no additional pollutants to report,
this form is not required to be included with your application. This requirement applies to all
NPDES facilities. The Chemical Addendum to NPDES Application will be required for any type
of facility with an NPDES permit, depending on whether those types of pollutants are found in
your wastewater.
Since the Robersonville WWTP does not monitoring for PFAS, or a specific chemical not listed on the
"40 CFR Part 136", we understand that this Chemical addendum is not required, nevertheless I have
filled the file as I mentioned before, and you can find it attached to this email.
On the right side I added a new column that includes the average values registered for the last 13
months (January 2022 through January 2023), so you can have the most accurate data.
Please if there is any suggestion for us to accomplish the requirements for the submittal of the
paperwork for the permit renewal it will be highly appreciated.
Respectfully
Daniel Sears Morales
Environmental Compliance Manager

Office: 252-235-4900
Direct: 984-365-9155
www.envirolinkinc.com
4D
CARE, CHARAWER, IKEI(EN([ & PROFESSIONALISM
From: Josh Powers <[e-mail]>
Sent: martes, 14 de marzo de 2023 09:59 a. m.
To: Daniel Sears <[e-mail]>
Subject: Fw: [External] - Chemical Addendum, Effluent Pollutant Scans for Robersonville WWTP
Thanks,
Josh Powers
Area Manager
Envirolink Inc.
ioowers(@envirolinkinc.com
704-775-6128 cell
F NV I R(-)1.1 : k
Care, Character, Excellence, & Professionalism
From: Perlmutter, Gary <gary_perlmutterCcDncdenr.gov>
Sent: Tuesday, March 14, 2023 10:09 AM
To: Josh Powers <ioowers(@envirolinkinc.com>
Subject: [External] - Chemical Addendum, Effluent Pollutant Scans for Robersonville WWTP
EXTERNAL EMAIL: Do not click any links or open any attachments unless you trust the sender and
know the content is safe.

Dear Josh,
I have not heard from you nor received the requested effluent pollutant scans or chemical
addendum for Robersonville WWTP (NC0026042). Can you give me a status on those documents?
Thank you,
Gary Perlmutter
Gary Perlmutter, Environmental Specialist II
NCDEQ/Division of Water Resources
NPDES Municipal Permitting Unit
919-707-3611 Office
919-306-1017 Cell
gary_perlmutter(@ncdenr.gov
Physical Address: 512 N Salisbury St., Raleigh, NC 27604
Mailing Address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the North Carolina Public Records
Law and may be disclosed to third parties.

AOBERSONVILLE
=irr.4vtfi9G "Anz�p—
Town of Robersonville WWTP NCO026042 Request for Reduction
With the Town of Robersonville being an individual NPDES permitted facility, we are submitting a
written request to modify our NPDES permit for the following parameters BOD, TSS, NH3-N
Ammonia as Nitrogen, and Fecal from daily-5/week to reduced monitoring of 2/week based on our
numerical data values and good standing history of our effluent compliance sampling submitted on
state eDMR monthly reports for the NPDES permit staff to consider our request based on the
approval criteria listed in the DWQ Guidance Regarding the Reduction of Monitoring Frequencies in
NPDES Permits for Exceptionally Performing Facilities dated October 22, 2012 section B:
• The facility has no more than one civil penalty assessment for permit limit violations
for each target parameter during the previous three years.
• Neither the permittee nor any of its employees have been convicted of criminal violations of
the Clean Water Act within the previous five years.
• The facility is not currently under an SOC for target parameter effluent limit noncompliance.
• The facility is not on EPA's Quarterly Noncompliance Report for target parameter limit
violations.
• For BOD5, CBOD5, TSS, NH3-N and TSS, the three year arithmetic mean of effluent
data must be less than fifty percent of the monthly average permit limit. For fecal
coliform or enterococci, the three year geometric mean must be less than 50 percent of
the monthly average permit limit. For parameters with summer and winter limits, an
annual arithmetic mean of the seasonal limits may be used in the calculation.
• With the exception of fecal coliform or enterococci, no more than 15 daily sampling results
over the 3-year review period can be over 200% of the monthly average limit for BOD5,
CBOD5, TSS, or NH3-N . Values associated with documented impacts of extreme weather
or events beyond the control of the permittee will not be included.
• For fecal coliform or enterococci, no more than 20 daily sampling results may be over 200%
of the weekly average limit. Values associated with documented impacts of extreme
weather or events beyond the control of the permittee will not be included.
• For the four target parameters, sampling results shall not show more than two non -monthly
average limit violations during the previous year.
• Reduced effluent monitoring must not impair assessment of sensitive downstream uses,
such as endangered species.
While it is always in the Town of Robersonville's interest to protect the environment and provide
excellent effluent discharge to the creeks, we hope that after a review of our daily compliance
efforts that DWQ will approve our reduction request knowing that our dedication will not change for
environmental excellence in the new issued permitted parameters sampling.
Si�,
Chris Roberson
Town Manager

Reduction in Frequency Evalaution
Facility:
Robersonville WWTP
Permit No.
NC0026042
Review period (use 3
11/2019 - 10/2022
yrs)
Approval Criteria: Y/N?
1. Not currently under SOC
Y
2. Not on EPA Quarterly noncompliance report
N
3. Facility or employees convicted of CWA
violations
N
# of non
monthly Monthly
3-yr mean
# daily
# daily
Reduce
SOo/
200%
200%
monthly
#civil penalty
Data Review
Units
average
(geo mean
< 50%?
samples
<15?
samples
< 207
> 2?
> 1?
Frequency?
average limit
limit
MA
for FC)
MA
>200%
WA
>200%
limit
asessment
(Yes/No )
violations
BOD (Weighted)
mg/L
7.50
5.00
2.5
2.16
Y
10.00
6
Y
0
N
0
N
N
TSS
mg/L
45.00
30.00
15
5.30
Y
60.00
3
Y
0
N
0
N
N
Ammonia (weighted)
mg/L
3.30
1.10
0.6
0.21
Y
2.20
10
Y
1
N
0
N
N
Fecal Coliform
#/100
400.00
1 200.00
1 1001
5.78
1 Y
800 1 0 1 Y
1 0
1 N
1 1
1 N
N

4/21/23, 10:25 AM
Quarterly NPDES Noncompliance Report I ECHO I US EPA
Quarterly NPDES Noncompliance Report
Facility Information
ROBERSONVILLE WWTP
1149 ROGERSON RD
ROBERSONVILLE, NC 27871
FRS ID: 110006367341
EPA Region: 04
Permit Details
Login Contact Us
Facility
NPDES ID Facility Name Facility Location
Permit
Components
Permitting Permittee
Status Designation
Permittee
Type
Type
Agency Name
Location
1149 ROGERSON RD,
ROBERSONVILLE
NPDES
Biosolids,
Town of
PO Box 487,
ROBERSONVILLE, POTW
NC0026042 WWTP
Individual
POTW,
Expired Major State Robersonville
Robersonville,
27871
Permit
Pretreatment
NC 278710487
Violation Details
Quarter FY2023QI X v
Customize Columns CSV Download
H
nn�nn _
DMR
Enforce
Violation Type
Violation
Violation
Violation
Parameter
Category
Violation States
Percent
Enforcement
Enforcement Type
Achie
Start Date
End Date
Location
Over
ID
Dat
Limit
�OOODOOODOOC
00310 -
42
Effluent
07/31/2022
001-M
BOD, 5-
2
Resolved
5
day, 20 deg.
C
01042 -
42
Effluent
07/31/2022
001-M
Copper,
2
Resolved
7
total [as Cu]
31616 -
Coliform,
42
Effluent
08/31/2022
001-M
fecal ME,
2
Resolved
11
MFC broth,
44.5 C
01042 -
42
Effluent
08/31/2022
001-M
Copper,
2
Resolved
107
total [as Cu]
01042 -
42
Effluent
08/31/2022
001-M
Copper,
2
Resolved
51
total [as Cu]
00665 -
42
DMR Reporting
10/31/2021
--
001-M
Phosphorus,
2
Resolved
--
total [as P]
1 Showing 1 through 42 of 42 violations
Environmental Conditions
https://echo.epa.gov/npdes-noncompliance-report?id=l 10006367341 &quarter=FY23Q1 1 /2

4/2
1/23, 10:25AM Quarterly NPDES Noncompliance Report I ECHO I US EPA
DMR Flow and Pollutant Loadings
NPDES ID Description 2019 2020 2021 2022 2023
NC0026042 Average Facility Flow (MGD) 0.44 0.51 0.49 0.27 0.57
NC0026042 Pollutant Load Over Limit (pounds) 2,329 0.82 2.69 27_54
NC0026042 Pollutant Load Over Limit (toxic -weighted pounds) 0.17 0.51 1.68 0�4
External Outfalls
NPDES ID
Permitted Feature
Receiving Waterbody Code Receiving Waterbody Name Latitude Longitude
There is no data to display
Assessed Waters from Latest States Submissions (ATTAINS)
Report
State
Assessment Assessment
Water Condition
Cause Groups DrinkingFish Other
Aquatic Life Consumption Recreation Use
Cycle
Unit ID Unit Name
Impaired Water Use Use
Use
NC 2022
NC28-103-2a Flat Swamp
Unknown - With
Insufficient Insufficient
Restoration Plan
Information Information
LAST UPDATED ON FEBRUARY 21, 2023
https://echo.epa.gov/npdes-noncompliance-report?id=l10006367341 &quarter=FY23Q1 2/2

Robersonville WWTP Fact Sheet Addendum NC0026042
Comments to the draft permit were received from Josh Powers, Area Manager for Envirolink Inc.,
contract operator for the Robersonville WWTP. Mr. Powers has since moved to another section and the
current contacts for Robersonville WWTP are:
• Andrew White cell 910-387-3787 [e-mail]
• Daniel Sears 984-365-9155 [e-mail]
Comments and Division responses (in blue) are outlined below.
Comment 1. In reviewing the fact sheet, we have reviewed and noticed that the PFAS quarterly sampling
will be a delayed implementation until the EPA approves a method. Including PFAS in the permit, we feel
that is premature given the fact that the EPA does not have an established procedure and that lab
capacity would almost assuredly result in non-compliance for failure to report in a timely manner.
Also, the quantitation level is going to be in the ppt range that DEQ is clean sample technics are going to
need to be developed along with the analytical methods and that will require significant training and
cost in clean sample technics.
If DEQ attempts to implement this requirement ahead of an approved standard, testing method or
sampling method it is not prudent and is not backed by a current rule. The Town of Robersonville's
Wastewater Treatment facility always has the environment's best interest in mind with our effluent
discharge and we look forward to our continued operations to perform the best quality of wastewater
discharge to the creek.
Division response: The purpose of the delayed implementation of PFAS monitoring is to allow
laboratories to become NC -certified in the new method. The method in question is EPA Method 1633,
of which the fourth draft was released in July 2023. This fourth draft is now the final, multi -laboratory
validated version for aqueous media (wastewater, surface water and groundwater). With parameter
codes for all 40 PFAS analytes of the method already established by the EPA, sampling and submitting
data via eDMRs can be performed. This condition is in other NPDES permits with similar PFAS concerns.
Comment 2. In the facts sheet it is noted that from November 2018 to October 2022 that the Copper
ug/L averaged 10.5 ug/I per month in the four-year period and the new Copper limit of 9.8 ug/L is a
33.3% decreased permitted limit based off the hardness. The Town of Robersonville understands the
state's perspective on implementing safe policies and regulatory limits for the protection of the
environment, but we also feel that this new limit is set to an unachievable standard giving the data. The
Town of Robersonville is working with our Pretreatment contributor to monitor the incoming HWA to
the wastewater treatment facility and would like to request a permitted limit more achievable in the
new permit to not be below the four-year monthly average used in the draft permit.
Division response: A three-year compliance schedule with a WER option has been added to the permit
as requested by the ORC.