NC0020800_Fact Sheet_20240117

Fact Sheet
NPDES Permit No. NCO020800
Permit Writer/Email Contact:Nick Coco,[e-mail]
Date:November 28,2023
Division/Branch:NC Division of Water Resources/NPDES Municipal Permitting
Fact Sheet Template: Version 09Jan2017
Permitting Action:
® 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 Andrews/Andrews Wastewater Treatment Plant(WWTP)
Applicant Address: PO Box 1210,Andrews,NC 28901
Facility Address: 464 Reagan Avenue,Andrews,NC 28901
Permitted Flow: 1.5 MGD
Facility Type/Waste: MAJOR/Municipal: 100%Domestic
Facility Class: Grade III
Treatment Units: Influent communicator,bar screen, grit chamber, dual trickling filter,
dual secondary clarifier, aerated sludge digester,chlorine contact
chamber, sulfur dioxide dichlorination, emergency stand-by power
Pretreatment Program(Y/N) Yes; Inactive—Only SIU dropped on July 18,2022
County: Cherokee
Region Asheville
Briefly describe the proposed permitting action and facility background: The Town of Andrews applied
for an NPDES permit renewal at 1.5 MGD for the Andrews WWTP on June 29,2023. This facility serves
a population of approximately 1,800 residents. Treated domestic wastewater is discharged via outfall 001
into the Valley River, a class C;Trout waterbody in the Hiwassee River Basin. Outfall 001 is
approximately 47 miles upstream of the North Carolina/Tennessee border and 17 miles upstream of Class
B Hiwassee Lake.
Sludge disposal: Settled sludge is pulled out of secondary clarifiers via telescoping valve system, and
pumped into aerobic digestor where supernate can be recirculated if need, and final sludge waste can be
pulled into drying beds to dry before haul off and disposal and county landfill.
Inflow and Infiltration(I/I): In their application,the Town noted an estimated average daily I/I flow of
100,000 gpd.
Page 1 of 11

2. Receiving Waterbody Information:
Receiving Waterbody Information
Outfalls/Receiving Stream(s): Outfall 001 -Valley River
Stream Segment: 1-52
Stream Classification: C; Trout
Drainage Area(mi2): 52.4
Summer 7Q10(cfs) 15
Winter 7Q10(cfs): 19
30Q2 (cfs): 30
Average Flow(cfs): 130
IWC (%effluent): 13%
2022 303(d) listed/parameter: Not Listed;However, downstream segment of Valley River listed
as impaired for fecal coliform
Subject to TMDL/parameter: Yes- State wide Mercury TMDL implementation.
Basin/HUC: Hiwassee/06020002
USGS Topo Quad: G3NE
3. Effluent Data Summary
Effluent data for Outfall 001 is summarized below for the period of June 2019 through October 2023.
Table 1. Effluent Data Summary Outfall 001
Parameter Units Average Max Min Permit Limit
Flow MGD 0.67 3.532 0.184 MA 1.5
BOD mg/1 21.4 90.6 4.5 WA 45.0
MA 30.0
NH3N summer mg/l 4.7 28 0.4 WA 18.0
MA 6.0
NH3N winter mg/1 8.8 50.6 0.1 WA 35.0
MA 14.7
TSS mg/1 22.9 130.5 3.3 WA 45.0
MA 30.0
pH SU 6.5 8.8 6 6.0>pH<9.0
(geometric)
9.4
Fecal coliform #/100 ml (ge2 > 17,500 < 1 WA 400
9.4 MA 200
Temperature ° C 17.9 28 6 Monitor&Report
TRC µg/L 13.0 49 10 DM 28
TN mg/1 10.7 27.3 3.66 Monitor&Report
TP mg/l 1.8 4.1 0.75 Monitor&Report
Bis (2-ethylhexyl) µg/L 15.5 101 < 1 Monitor&Report
phthalate
Total Mercury ng/L 6.1 8.26 4.84 Monitor&Report
Total Hardness mg/l 64.8 84 50 Monitor&Report
MA-Monthly Average,WA-Weekly Average,DM-Daily Maximum,DA=Daily Average
Page 2 of 11

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/l 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): NO
Name of Monitoring Coalition: N/A
If applicable, summarize any instream data and what instream monitoring will be proposed for this
permit action: The current permit does not require instream monitoring.
As the receiving stream is classified as Trout waters, instream temperature monitoring has been added to
the permit.
As the facility has reported numerous permit limit violations for oxygen-consuming wastes, instream DO
monitoring has been added to the permit.
As the segment of the Valley River downstream of the Andrews WWTP discharge is listed as impaired
for fecal coliform in the 2022 303(d)List and the facility has reported fecal coliform limit violations
during the period reviewed(past 5 years), instream fecal coliform monitoring has been added to the
permit.
Based on discussions with the Basin Planning Branch regarding the upward trend of nutrient
concentrations at the downstream monitoring station and the Andrews WWTP history of effluent
ammonia limitation noncompliance, instream monitoring for ammonia, TKN,NO2+NO3 and TP have
been added to the permit at a frequency of once per month.
As the receiving water is a trout stream and as the effluent hardness is elevated for domestic wastewater,
instream conductivity monitoring has been added to the permit at a frequency of once per month.
Upstream and downstream monitoring for temperature, DO and fecal coliform shall be conducted three
times per week during June, July,August, and September, and once per week during the rest of the year.
Upstream monitoring shall be conducted approximately 0.5 miles upstream at the intersection of Hwy.
19/74 and US Business 19. Downstream monitoring shall be conducted approximately 0.3 miles
downstream at Reagan Avenue.
5. Compliance Summary
Summarize the compliance record with permit effluent limits (past 5 years): The facility reported 10 BOD
limit violations,4 fecal coliform limit violations, 1 flow limit violation, 29 ammonia limit violations and
15 TSS limit violations resulting in enforcement from November 2018 through November 2023.
Summarize the compliance record with aquatic toxicity test limits and any second species test results
(past 5 years): The facility passed 19 of 19 quarterly chronic toxicity tests, as well as all 4 second species
chronic toxicity tests from March 2019 to October 2023.
Summarize the results from the most recent compliance inspection: The last facility inspection conducted
in April 2023 reported that the facility was not compliant with permit NC0020800. The inspection report
noted the following compliance issues:
• the influent sampler measured 10°C while the temperature of the sampler should be between 0°C
and 6°C,
Page 3 of 11

• the influent pump station has only 2 of 3 pumps installed and operating at the moment. The
pumps can only be run one at a time in manual mode because the control panel doesn't work.
This presents a risk for a sewage overflow since a back-up pump will not turn on in the event that
the operating pump has a failure. This is also causing difficulty for the plant to treat ammonia.
Because they can only run one pump at a time, it's limiting their ability to recirculate the trickling
filter effluent back to the pump station,which limits the ammonia removal(conversion to nitrate).
The construction for a new influent pump is scheduled to begin in early summer. This is a critical
repair/upgrade for this facility.
• The South trickling filter distribution arm-rotator is now also broken(North trickling filter
distributor has been broken since 2021), so neither trickling filter is receiving proper distribution
or recirculation.
• The chlorine contact chamber had a 2-2.5' sludge blanket out of 4' depth. The chlorine contact
chamber needs to be pumped out more frequently to prevent solids from discharging through the
outfall. The chlorine contact chamber had overflowed just a few days prior to this inspection and
it was not reported to the State. Any overflow of any process in the WWTP is considered a
bypass and needs to be reported to the State under Part II(E)6.a. of the NPDES Permit Standard
Conditions. According to Tim Wood(ORC)the overflows at the contact chamber are caused by
an under-sized effluent line.
Due to the Town's history of non-compliance and noted issues at the facility, Special Condition A.(5.)
Wastewater Management Plan has been added to the permit. This special condition requires the Town to
have a North Carolina licensed Professional Engineer evaluate the structural integrity and operational
efficiency of the Andrews WWTP to ensure the integrity of the treatment. Based on this evaluation,the
Engineer and Town shall submit to the Division a wastewater management plan that includes an
assessment of facilities and an optimization plan. Additionally, the Town shall submit annual reports
summarizing actions taken towards achieving and maintaining compliance with permit limitations. The
Town has received funding via the American Rescue Plan Act(ARPA)to perform facility improvements.
Intended improvements and use of the ARPA funding shall be summarized in the report to the Division.
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: 1Q10 streamflow(acute Aquatic Life); 7Q10 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/1 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: NA; BOD limits are
consistent with secondary TBEL limits,based on the results of a Level B model conducted in 1985 and
verified in 1992.No changes are proposed.
Page 4 of 11

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/1(summer)and 1.8 mg/1(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 ug/1)and capped at 28 ug/l(acute impacts). Due to analytical issues, all TRC values
reported below 50 ug/1 are considered compliant with their permit limit.
Describe any proposed changes to ammonia and/or TRC limits for this permit renewal: The current
permit sets a daily maximum limit for total residual chlorine(TRC) at 28 ug/L. Based on the attached
wasteload allocation(WLA)review,no changes are proposed for TRC.
While a WLA conducted in 1998 stated that ammonia limits were probably needed in the permit, monthly
average and weekly average limits for summer and winter ammonia were introduced into the permit in
2003,based on the 1998 WLA calculations and the 2003 statewide policy prompted by EPA requirements
that called for a 3:1 ratio between weekly and monthly average ammonia limits. The permit set weekly
average limits for summer and winter ammonia of 18 mg/L and 35 mg/L,respectively. It also set monthly
average limits for summer and winter ammonia of 6 mg/L and 14.7 mg/L,respectively. The ammonia
limits were reviewed in the attached WLA. There are no proposed changes to limits for ammonia.
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
dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of
Instream Dissolved Metals Standards, dated June 10, 2016.
A reasonable potential analysis was conducted on effluent toxicant data collected between June 2019 and
March 2023. 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 Monitoriniz. 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: Bis (2-ethylhexyl)phthalate
• 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: Aluminum
• 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: Total Cadmium, Total Chromium, Total Copper, Total Cyanide, Total Lead,
Total Nickel, Total Silver,Total Zinc
• POTW Effluent Pollutant Scan Review: Three effluent pollutant scans (2019,2020 and 2021)
were evaluated for additional pollutants of concern.
Page 5 of 11

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
o 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: Total
Arsenic, Total Beryllium, Total Selenium, Total Phenolic Compounds
EPA provides a Nationally Recommended Water Quality Criteria(NRWQC)of 87 ug/L for aluminum in
Class C waters with a pH of 6.5 —9.0 s.u. While ambient pH data are not available,the average effluent
pH reported was 6.5 s.u. during the review period. To ensure protection of the receiving stream,the
EPANRWQC was applied. While review of data demonstrated elevated levels of aluminum in the
effluent,the Town's sole SIU, an aluminum polisher, dropped in 2022 and no data exist since the SIU
dropped from the Town's pretreatment program. Quarterly effluent monitoring has been added to the
permit with an aluminum reopener condition. After a 24-month sampling period,the Town may request
the Division conduct a review of submitted data for assessment and approval of an aluminum monitoring
frequency reduction from quarterly to annually.
The current NPDES permit required that the Effluent Pollutant Scans be conducted in the years 2020,
2021 and 2022. The Town conducted their scans in 2019, 2020 and 2021. The Town shall conduct their
effluent pollutant scans during the years specified in their permit. Should this happen again,the violation
may result in enforcement.
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 13%
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
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/1)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/1) and/or if any individual value exceeds a TBEL
value of 47 ng/l.
Page 6 of 11

Table 3. Mercury Effluent Data Summary
2019 2020 2021 2022 2023
#of Samples 1 1 1 1 1
Annual Average Conc.n /L 8.56 5.3 9.01 4.84 8.26
Maximum Conc.,n /L 8.56 5.3 9.01 4.84 8.26
TBEL,n /L 47
WQBEL,n /L 1 1223
Describe proposed permit actions based on mercury evaluation: Since no annual average mercury
concentration exceeded the WQBEL, and no individual mercury sample exceeded the TBEL,no mercury
limit is required.As such,the annual monitoring requirement for low level mercury has been removed. As
the facility is<2 MGD,no mercury minimization plan(MMP) is required.
Other TMDL/Nutrient Management Strategy Considerations
If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation
within this permit: NA
Other WQBEL Considerations
If applicable, describe any other parameters of concern evaluated for WQBELs: As required by Session
Law 2018-5, Senate Bill 99, Section I LI r), every applicant shall submit documentation of any additional
pollutants for which there are certified methods with the permit application if their discharge is
anticipated via a Chemical Addendum to NPDES Application table. As an attachment to the permit
application,the Town informed the Division that no monitoring for additional pollutants has been
conducted(see attached chemical addendum)and therefore no additional pollutants of concern have been
identified.
To better understand the contribution of PFAS compounds from the Andrews WWTP,monitoring of
PFAS chemicals will be added to the permit at a frequency of quarterly. Since an EPA method for
sampling and analyzing PFAS in wastewater is not currently available,the PFAS sampling requirement in
the Permit includes a compliance schedule which delays the effective date of this requirement 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. This date may be extended upon request and if there are no NC-
certified labs.
If applicable, describe any special actions (HQW or ORW) this receiving stream and classification shall
comply with in order to protect the designated waterbody:NA
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: NA
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 mg/l
BODS/TSS for Monthly Average, and 45 mg/Z 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 BODS/TSS included in the permit? YES; Overall BOD and TSS
removal were above 85%during the period reviewed. However,the removal rates for BOD and TSS
dropped below 85%on occasion.
If NO,provide a justification (e.g., waste stabilization pond). NA
Page 7 of 11

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 2B.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).
Are any effluent limitations less stringent than previous permit(YES/NO): NO;However total mercury
monitoring has been removed. See Mercury Statewide TMDL Evaluation for more information.
If YES, confirm that antibacksliding provisions are not violated:N/A
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.
For instream monitoring,refer to Section 4.
Effluent dissolved monitoring is not currently required in the permit based on the results of the 1985
WLA,verified in 1992 and 1998.No changes are proposed for effluent DO monitoring at this time.
For calculation of TN, monthly effluent monitoring of TKN and NO2+NO3 has been added to the permit.
To investigate potential unidentified industrial sources to the Andrews WWTP, effluent conductivity has
been added to the permit at a monthly frequency.
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. While NPDES regulated facilities would initially be required to submit additional
NPDES reports electronically effective December 21, 2020, EPA extended this deadline from December
21,2020,to December 21,2025. The current compliance date, effective January 4,2021,was extended as
a final regulation change published in the November 2,2020 Federal Register. This permit contains the
requirements for electronic reporting, consistent with Federal requirements.
Page 8 of 11

12. Summary of Proposed Permitting Actions:
Table 4. Current Permit Conditions and Proposed Changes Outfall 001
Parameter Current Permit Proposed Change Basis for Condition/Change
Flow MA 1.5 MGD No change 15A NCAC 2B .0505
BOD5 MA 30.0 mg/l No change TBEL. 1985 WLA verified in
WA 45.0 mg/l 1992; Secondary treatment
Monitor and report daily standards/40 CFR 133 / 15A
NCAC 2B .0406; Surface Water
Monitoring, 15A NCAC 2B. 0500
NH3-N Summer: No change WQBEL. 1998 WLA;verified
MA 6.0 mg/l with 2023 WLA; Surface Water
WA 18.0 mg/l Monitoring, 15A NCAC 2B. 0500
Winter:
MA 14.7 mg/l
WA 35.0 mg/l
Monitor and report daily
TSS MA 30 mg/1 No change TBEL. Secondary treatment
WA 45 mg/1 standards/40 CFR 133 / 15A
Monitor and report daily NCAC 2B .0406; Surface Water
Monitoring, 15A NCAC 2B. 0500
Fecal coliform MA 200/100ml No change WQBEL. State WQ standard,
WA 400/100ml 15A NCAC 2B .0200; Surface
Monitor and report daily Water Monitoring, 15A NCAC
2B. 0500
Temperature Monitor and Report Daily No change Surface Water Monitoring, 15A
NCAC 2B. 0508
Conductivity No requirement Monitor and Report Surface Water Monitoring,
Monthly investigation of industrial sources
pH 6—9 SU No change WQBEL. State WQ standard,
Monitor and Report Daily 15A NCAC 2B .0200; 15A
NCAC 02B .0500
Total Residual DM 28 ug/L No change WQBEL. 2023 WLA. Surface
Chlorine Monitor and Report Daily Water Monitoring, 15A NCAC
2B. 0500
TKN No requirement Monitor and Report For calculation of TN
Monthly
NO2+NO3 No requirement Monitor and Report For calculation of TN
Monthly
Total Nitrogen Monitor and Report No change Surface Water Monitoring, 15A
Monthly NCAC 2B. 0500
Total Phosphorus Monitor and Report No change Surface Water Monitoring, 15A
Monthly NCAC 2B. 0500
Total Hardness Quarterly monitoring No changes Hardness-dependent dissolved
Upstream and in Effluent metals water quality standards
approved in 2016
Instream No requirement Add instream Surface Water Monitoring; 15A
Monitoring monitoring of DO, NCAC 02B .0508; Trout Waters
temperature and fecal —track temperature impacts;DO
Page 9 of 11

coliform three times based on BOD and ammonia
per week during June, violation history; fecal coliform
July,August, and based on violation history and
September, and once downstream impairment
per week during the
rest of the year;
Add instream
monitoring for
ammonia,TKN,
NO2+NO3, TP and
conductivity monthly
Bis (2-ethylhexyl) Monitor and Report MA 21.0 µg/L Based on results of RPA; RP
phthalate Quarterly DM 21.0 µg/L shown- apply Monthly
Monitor monthly Monitoring with Limit
Total Aluminum No requirement Monitor and report Based on review of effluent data
quarterly with 24- and consideration of SIU
month sampling departure
reassessment
Add Reopener
condition
Total Mercury Monitor and Report Remove requirement Based on Statewide Mercury
Annually TMDL evaluation—no
monitoring required
Add quarterly Evaluation of PFAS contribution:
PFAS No requirement monitoring with Implementation delayed until
delayed after EPA certified method
implementation becomes available.
Special Condition No requirement Add Condition A.(5.) Addressing history of non-
A.(5.)Wastewater compliance.
Management Plan
Toxicity Test Chronic limit, 13% No change WQBEL. No toxics in toxic
effluent amounts. 15A NCAC 213.0200
and 15A NCAC 213.0500
Effluent Pollutant Three times per permit No change; conducted 40 CFR 122
Scan cycle in 2025,2026, 2027
Electronic Electronic Reporting No change In accordance with EPA
Reporting I Special Condition I Electronic Reporting Rule 2015.
MGD—Million gallons per day,MA- Monthly Average,WA—Weekly Average,DM—Daily Max
13. Public Notice Schedule:
Permit to Public Notice: xx/xx/xxxx
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 days comment period indicating the interest of the party filing such request and the
reasons why a hearing is warranted.
14. NPDES Division Contact
If you have any questions regarding any of the above information or on the attached permit,please
contact Nick Coco at(919) 707-3609 or via email at nick.cocokdeq.nc.gov.
Page 10 of 11

15. Fact Sheet Addendum (if applicable):
Were there any changes made since the Draft Permit was public noticed(Yes/No):NO
If Yes, list changes and their basis below:NA
16. Fact Sheet Attachments (if applicable):
• RPA Spreadsheet Summary
• NPDES Implementation of Instream Dissolved Metals Standards—Freshwater Standards
• NH3/TRC WLA Calculations
• BOD&TSS Removal Rate Calculations
• Mercury TMDL Calculations
• Additional information Requested
• WET Testing and Self-Monitoring Summary
Page 11 of 11

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information Table 2. Parameters of Concern
❑ CHECK IF HQW OR ORW WQS Name WQS Type Chronic Modifier Acute PQL Units
Facility Name Andrews WWTP Par01 Arsenic Aquactic Life C 150 FW 340 ug/L
WWTP/WTP Class Grade III Par02 Arsenic Human Health C 10 HH/WS N/A ug/L
Water Supply
NPDES Permit NCO020800 Par03 Beryllium Aquatic Life NC 6.5 FW 65 ug/L
Outfall 001 Par04 Cadmium Trout NC 1.1589 TR 2.3945 ug/L
Flow, Qw (MGD) 1.500 Par05 Chlorides Aquatic Life NC 230 FW mg/L
Receiving Stream Valley River Par04 Chlorinated Phenolic Compounds Water Supply NC 1 A ug/L
HUC Number 06020002 Par07 Total Phenolic Compounds Aquatic Life NC 300 A ug/L
Stream Class C;Tr Par08 Chromium III Aquatic Life NC 137.9535 FW 1087.3214 ug/L
❑ Apply WS Hardness WQC Par09 Chromium VI Aquatic Life NC 11 FW 16 pg/L
7Q10s (cfs) 15.00 Par10 Chromium, Total Aquatic Life NC N/A FW N/A Ng/L
7Q10w (cfs) 19.00 Par11 Copper Aquatic Life NC 9.2978 FW 12.9325 ug/L
30Q2 (cfs) 30.00 Par12 Cyanide Aquatic Life NC 5 FW 22 10 ug/L
QA(cfs) 130.00 Par13 Fluoride Aquatic Life NC 1,800 FW ug/L
1Q10s (cfs) 12.41 Par14 Lead Aquatic Life NC 3.6565 FW 97.0940 ug/L
Effluent Hardness 64.78 mg/L (Avg) Par15 Mercury Aquatic Life NC 12 FW 0.5 ng/L
------------- ----------------------
Upstream Hardness 25 mg/L (Avg) I Par16 Molybdenum Human Health NC 2000 HH ug/L
Combined Hardness Chronic 30.34 mg/L I Par17 Nickel Aquatic Life NC 43.8545 FW 405.1463 pg/L
Combined Hardness Acute ____ _5 m_31.28 mg/L I Par18 Nickel Water Supply NC 25.0000 WS N/A pg/L
Data Source(s) Default hardness of 2g/L used as upstream Par19 Selenium Aquatic Life NC 5 FW 56 ug/L
❑ CHECK TO APPLY MODEL hardness averaged < 25 mg/L. Aluminum criteria Par20 Silver Aquatic Life NC 0.06 FW 0.4357 ug/L
based on EPA Nationally Recommended Water
Quality Criteria for Aquatic Life & Human Health - Par21 Zinc Aquatic Life NC 149.3159 FW 151.9765 ug/L
applies to streams with pH of 6.5 - 9.0 s.u. No Par22 Bis (2-ethylhexyl) phthalate Human Health C 0.37 HH pg/L
ambient pH data available. Criteria applied as
Par23 Aluminum Aquatic Life NC 87 FW pg/L
conservative assumption.
Follow directions for data entry. In some cases a Par24
20800 RPA 2023, input
12/20/2023

REASONABLE POTENTIAL ANALYSIS
H1 H2 Use"PASTE SPECIAL Use"PASTE SPECIAL
Effluent Hardness Values"then"COPY" Upstream Hardness Values"then"COPY"
Maximum data .Maximum data
points=58 points=58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 6/4/2019 50 50 Std Dev. 8.6334 1 Default 25 25 Std Dev. N/A
2 9/3/2019 54 54 Mean 64.7778 2 Mean 25.0000
3 12/3/2019 84 84 C.V. 0.1333 3 C.V. 0.0000
4 3/10/2020 74 74 n 18 4 n 1
5 6/2/2020 63 63 10th Per value 55.40 mg/L 5 10th Per value 25.00 mg/L
6 9/8/2020 58 58 Average Value 64.78 mg/L 6 Average Value 25.00 mg/L
7 12/8/2020 70 70 Max. Value 84.00 mg/L 7 Max. Value 25.00 mg/L
8 3/2/2021 69 69 8
9 6/8/2021 56 56 9
10 9/7/2021 76 76 10
11 12/14/2021 66 66 11
12 3/8/2022 66 66 12
13 6/14/2022 58 58 13
14 9/6/2022 61 61 14
15 12/6/2022 69 69 15
16 3/6/2023 72 72 16
17 6/5/2023 59 59 17
18 9/5/2023 61 61 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
20800 RPA 2023, data
- 1 - 12/20/2023

REASONABLE POTENTIAL ANALYSIS
Par01 & Par02
Use"PASTE SPECIAL
Arsenic Values"then"COPY"
Maximum data
points=58
Date Data BDL=1/2DL Results
1 12/3/2019 < 10 5 Std Dev. 0.0000
2 4/1/2020 < 10 5 Mean 5.0000
3 9/7/2021 < 10 5 C.V. (default) 0.6000
4 n 3
5
6 Mult Factor= 3.00
7 Max. Value 5.0 ug/L
8 Max. Pred Cw 15.0 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
20800 RPA 2023, data
-2 - 12/20/2023

REASONABLE POTENTIAL ANALYSIS
Par03 Par04
Use"PASTE SPECIAL Use"PASTE SPECIAL
Beryllium Values"then"COPY" Cadmium Values"then"COPY"
Maximum data .Maximum data
points=58 points=58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 12/3/2019 < 1 0.5 Std Dev. 0.0000 1 8/5/2019 < 1 0.5 Std Dev. 0.5000
2 4/1/2020 < 1 0.5 Mean 0.5000 2 11/4/2019 < 1 0.5 Mean 0.6250
3 9/7/2021 < 1 0.5 C.V. (default) 0.6000 3 2/5/2020 < 1 0.5 C.V. 0.8000
4 n 3 4 5/15/2020 < 1 0.5 n 16
5 5 8/3/2020 < 1 0.5
6 Mult Factor= 3.00 6 11/2/2020 < 5 2.5 Mult Factor= 1.63
7 Max. Value 0.50 ug/L 7 2/1/2021 < 1 0.5 Max. Value 2.500 ug/L
8 Max. Pred Cw 1.50 ug/L 8 5/3/2021 < 1 0.5 Max. Pred Cw 4.075 ug/L
9 9 8/2/2021 < 1 0.5
10 10 11/2/2021 < 1 0.5
11 11 2/2/2022 < 1 0.5
12 12 5/2/2022 < 1 0.5
13 13 3/6/2023 < 1 0.5
14 14 12/3/2019 < 1 0.5
15 15 4/1/2020 < 1 0.5
16 16 9/7/2021 < 1 0.5
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
20800 RPA 2023, data
-3- 12/20/2023

REASONABLE POTENTIAL ANALYSIS
Par07 Part O
Use"PASTE SPECIAL Use"PASTE SPECIAL
Total Phenolic Compounds Values"then"COPY" Chromium' Total Values"then"COPY"
Maximum data Maximum data
points=58 points=58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 12/3/2019 < 5 2.5 Std Dev. 0.0000 1 8/5/2019 < 5 2.5 Std Dev. 0.8062
2 4/1/2020 < 5 2.5 Mean 2.5000 2 11/4/2019 < 5 2.5 Mean 2.1250
3 9/7/2021 < 5 2.5 C.V. (default) 0.6000 3 2/5/2020 < 5 2.5 C.V. 0.3794
4 n 3 4 5/15/2020 < 5 2.5 n 16
5 5 8/3/2020 < 5 2.5
6 Mult Factor= 3.00 6 11/2/2020 < 5 2.5 Mult Factor= 1.29
7 Max. Value 2.5 ug/L 7 2/1/2021 < 5 2.5 Max. Value 2.5 pg/L
8 Max. Pred Cw 7.5 ug/L 8 5/3/2021 < 5 2.5 Max. Pred Cw 3.2 pg/L
9 9 8/2/2021 < 5 2.5
10 10 11/2/2021 < 5 2.5
11 11 2/2/2022 < 1 0.5
12 12 5/2/2022 < 1 0.5
13 13 3/6/2023 < 1 0.5
14 14 12/3/2019 < 5 2.5
15 15 4/1/2020 < 5 2.5
16 16 9/7/2021 < 5 2.5
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
20800 RPA 2023, data
-4- 12/20/2023

REASONABLE POTENTIAL ANALYSIS
Pal Par12
Use"PASTE SPECIAL Use"PASTE SPECIAL
Copper Values"then"COPY" Cyanide Values"then"COPY"
pp .Maximum data y .Maximum data
points=58 points=58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 8/5/2019 < 0.5 0.25 Std Dev. 2.9824 1 8/5/2019 < 5 5 Std Dev. 1.5492
2 2/5/2020 3 3 Mean 4.9500 2 2/5/2020 < 5 5 Mean 5.40
3 5/15/2020 3 3 C.V. 0.6025 3 5/15/2020 < 5 5 C.V. 0.2869
4 8/3/2020 11 11 n 15 4 8/3/2020 < 5 5 n 15
5 11/2/2020 4 4 5 11/2/2020 7 5
6 2/1/2021 3 3 Mult Factor= 1.50 6 2/1/2021 < 5 5 Mult Factor= 1.23
7 5/3/2021 8 8 Max. Value 11.00 ug/L 7 5/3/2021 < 5 5 Max. Value 11.0 ug/L
8 8/2/2021 8 8 Max. Pred Cw 16.50 ug/L 8 8/2/2021 < 5 5 Max. Pred Cw 13.5 ug/L
9 11/2/2021 6 6 9 11/2/2021 < 5 5
10 2/2/2022 5 5 10 2/2/2022 < 5 5
11 5/2/2022 7 7 11 5/2/2022 11 11
12 3/6/2023 3 3 12 3/6/2023 < 5 5
13 12/3/2019 4 4 13 12/3/2019 5 5
14 4/1/2020 < 2 1 14 4/1/2020 < 5 5
15 9/7/2021 8 8 15 9/7/2021 < 5 5
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
20800 RPA 2023, data
- 5- 12/20/2023

REASONABLE POTENTIAL ANALYSIS
Par14 Par17 & Par18
Use"PASTE SPECIAL Use"PASTE SF
Lead values"then"COPY" Nickel values"then"I
Maximum data .Maximum<
points=58 points=5
Date BDL=1/2DL Results Date Data BDL=1/2DL Results
1 8/5/2019 < 5 2.5 Std Dev. 0.8459 1 8/5/2019 < 10 5 Std Dev. 1.8140
2 11/4/2019 < 5 2.5 Mean 1.4688 2 11/4/2019 < 10 5 Mean 4.1563
3 2/5/2020 < 5 2.5 C.V. 0.5760 3 2/5/2020 < 10 5 C.V. 0.4365
4 5/15/2020 < 5 2.5 n 16 4 5/15/2020 < 10 5 n 16
5 8/3/2020 < 2 1 5 8/3/2020 < 10 5
6 11/2/2020 < 2 1 Mult Factor= 1.45 6 11/2/2020 < 10 5 Mult Factor= 1.34
7 2/1/2021 < 2 1 Max. Value 2.500 ug/L 7 2/1/2021 < 10 5 Max. Value 5.0
8 5/3/2021 < 2 1 Max. Pred Cw 3.625 ug/L 8 5/3/2021 < 10 5 Max. Pred Cw 6.7
9 8/2/2021 < 2 1 9 8/2/2021 < 10 5
10 11/2/2021 < 2 1 10 11/2/2021 < 10 5
11 2/2/2022 < 1 0.5 11 2/2/2022 < 1 0.5
12 5/2/2022 < 1 0.5 12 5/2/2022 < 1 0.5
13 3/6/2023 < 1 0.5 13 3/6/2023 < 1 0.5
14 12/3/2019 < 5 2.5 14 12/3/2019 < 10 5
15 4/1/2020 < 5 2.5 15 4/1/2020 < 10 5
16 9/7/2021 < 2 1 16 9/7/2021 < 10 5
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
20800 RPA 2023, data
-6- 12/20/2023

REASONABLE POTENTIAL ANALYSIS
�ECIAL Par19 Par20
Use"PASTE SPECIAL Use"PASTE SF
COPY" Selenium Values"then"COPY" Silver Values"then
tata .Maximum data .Maximum<
;8 points=58 points=5
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 12/3/2019 < 10 5 Std Dev. 2.8868 1 6/4/2019 < 1 0.5 Std Dev. 0.0171
2 4/1/2020 10 10 Mean 8.3333 2 8/5/2019 < 1 0.5 Mean 0.4938
3 9/7/2021 10 10 C.V. (default) 0.6000 3 2/5/2020 < 1 0.5 C.V. 0.0346
4 n 3 4 5/15/2020 < 1 0.5 n 16
5 5 8/3/2020 < 1 0.5
6 Mult Factor= 3.00 6 11/2/2020 < 1 0.5 Mult Factor= 1.02
fag/L 7 Max. Value 10.0 ug/L 7 2/1/2021 < 1 0.5 Max. Value 0.500
fag/L 8 Max. Pred Cw 30.0 ug/L 8 5/3/2021 < 1 0.5 Max. Pred Cw 0.510
9 9 8/2/2021 < 1 0.5
10 10 11/2/2021 < 1 0.5
11 11 2/2/2022 < 1 0.5
12 12 5/2/2022 < 0.9 0.45
13 13 3/6/2023 < 0.9 0.45
14 14 12/3/2019 < 1 0.5
15 15 4/1/2020 < 1 0.5
16 16 9/7/2021 < 1 0.5
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
20800 RPA 2023, data
-7- 12/20/2023

REASONABLE POTENTIAL ANALYSIS
�ECIAL Par21 Par22
Use"PASTE SPECIAL Use"PASTE SF
COPY" Values"then"COPY" Values"then"i
tata Zinc Values"
data BIS (2-ethylheXyl) phthalate Maximum c
;8 points=58 points=5
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 8/5/2019 27 27 Std Dev. 10.1887 1 12/3/2019 < 10 5 Std Dev. 22.5370
2 2/5/2020 25 25 Mean 31.3333 2 3/10/2020 < 10 5 Mean 12.3539
3 5/15/2020 20 20 C.V. 0.3252 3 6/2/2020 17.5 17.5 C.V. 1.8243
4 8/3/2020 41 41 n 15 4 9/8/2020 < 20 10 n 18
5 11/2/2020 23 23 5 12/8/2020 15.1 15.1
6 2/1/2021 22 22 Mult Factor= 1.26 6 3/2/2021 < 10 5 Mult Factor= 2.12
ug/L 7 5/3/2021 44 44 Max. Value 45.0 ug/L 7 6/8/2021 < 10 5 Max. Value 101.000000
ug/L 8 8/2/2021 42 42 Max. Pred Cw 56.7 ug/L 8 9/7/2021 < 10 5 Max. Pred Cw 214.120000
9 11/2/2021 45 45 9 12/14/2021 < 10 5
10 2/2/2022 30 30 10 3/8/2022 8.61 8.61
11 5/2/2022 43 43 11 6/14/2022 101 101
12 3/6/2023 21 21 12 9/6/2022 < 5 2.5
13 12/3/2019 27 27 13 12/6/2022 9.8 9.8
14 4/1/2020 18 18 14 3/6/2023 1 1
15 9/7/2021 42 42 15 6/5/2023 4.76 4.76
16 16 12/3/2019 < 10 5
17 17 4/1/2020 < 10 5
18 18 9/7/2021 12.1 12.1
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
20800 RPA 2023, data
-8- 12/20/2023

REASONABLE POTENTIAL ANALYSIS
Par23
)ECIAL Use"PASTE SPECIAL
:OPY', Aluminum Values"then"COPY"
tata .Maximum data
;8 points=58
Date Data BDL=1/2DL Results
1 8/5/2019 110 110 Std Dev. 97.7071
2 11/4/2019 260 260 Mean 226.4545
3 2/5/2020 150 150 C.V. 0.4315
4 5/15/2020 170 170 n 11
5 8/3/2020 290 290
6 2/1/2021 190 190 Mult Factor= 1.47
Ng/L 7 5/3/2021 310 310 Max. Value 450.000000 pg/L
fag/L 8 8/2/2021 450 450 Max. Pred Cw 661.500000 pg/L
9 11/2/2021 240 240
10 2/2/2022 144 144
11 5/2/2022 177 177
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
20800 RPA 2023, data
-9- 12/20/2023

Andrews WWTP > Outfall 001
NCO020800 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators Qw = 1 .5 MGD
MAXIMUM DATA POINTS = 58
Qw (MGD) = 1.5000 WWTP/WTP Class: Grade III COMBINED HARDNESS (mg/L)
1Q10S (cfs) = 12.41 IWC% @ 1Ql0S = 15.77875806 Acute = 31.28 mg/L
7Q10S (cfs) = 15.00 IWC% @ 7QIOS = 13.41991342 Chronic= 30.34 mg/L
7QIOW (cfs) = 19.00 IWC% @ 7Q10W= 10.90269637
30Q2 (cfs) = 30.00 IWC% @ 30Q2 = 7.192575406
Avg. Stream Flow, QA(cfs) = 130.00 IW%C @ QA= 1.757037597
Receiving Stream: Valley River HUC 06020002 Stream Class: C;Tr
PARAMETER NC STANDARDS OR EPA CRITERIA J co REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
TYPE Aplied Chronic Standa d Acute D n #Det. Max Pred Cw Allowable Cw
Acute (FW): 2,154.8
Arsenic C 150 FW(7Q 1 Os) 340 ug/L _
3 0 15.0 Chronic (FW) 1,117.7 No RP, Predicted Max< 50% of Allowable Cw- No
C.V. (default) Max MDL= 10 Monitoring required
--------- -----------------------------
Arsenic C 10 HH/WS(Qavg) ug/L Note: n<9 NO DETECTS Chronic (HH) 569.1
Limited data set Max MDL 10
Acute: 411.95
Beryllium NC 6.5 FW(7Q10s) 65 ug/L 3 0 1.50
Note: n<9 C.V. (default) Chronic: 48.44 No RP, Predicted Max< 50% of Allowable Cw- No
Limited data set NO DETECTS Max MDL= 1 Monitoring required
Acute: 15.176
Cadmium NC 1.1589 TR(7Q10s) 2.3945 ug/L 16 0 4.075
Chronic: 8.636 All values non-detect < 5 ug/L and < 1 ug/L- no
NO DETECTS Max MDL= 5 monitoring required
Acute: NO WQS
Total Phenolic Compounds NC 300 A(30Q2) ug/L 3 0 7.5
Note: n<9 C.V. (default) Chronic: 4,171.0 No RP, Predicted Max< 50% of Allowable Cw- No
Limited data set NO DETECTS Max MDL= 5 Monitoring required
Acute: 6,891.0
Chromium III NC 137.9535 FW(7Q10s) 1087.3214 µg/L 0 0 N/A
--Chronic: ---- 1,028.0 -- ---------------------------
Acute: 101.4
Chromium VI NC I 1 FW(7Q10s) 16 µg/L 0 0 N/A
--Chronic: ----- 82.0 --- ---------------------------
Chromium, Total NC µg/L 16 0 3.2 Max reported value = 2.5 a: No monitoring required if all Total Chromium
samples are < 5 pg/L or Pred. max for Total Cr is <
allowable Cw for Cr VI.
NO DETECTS Max MDL 5
Acute: 81.96
Copper NC 9.2978 FW(7Q10s) 12.9325 ug/L 15 13 16.50
Chronic: 69.28 No RP, Predicted Max< 50% of Allowable Cw- No
No value >Allowable Cw Monitoring required
Acute: 139.4
Cyanide NC 5 FW(7Q10s) 22 10 ug/L 15 3 13.5
Chronic: 37.3 No RP, Predicted Max< 50% of Allowable Cw- No
No value >Allowable Cw Monitoring required
20800 RPA 2023, rpa
Page 1 of 2 12/20/2023

Andrews WWTP > Outfall 001
NCO020800 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators Qw = 1 .5 MGD
Acute: 615.346
Lead NC 3.6565 FW(7Q1Os) 97.0940 ug/L 16 0 3.625
Chronic: 27.247 No RP, Predicted Max< 50% of Allowable Cw- No
NO DETECTS Max MDL= 5 Monitoring required
Acute (FW): 2,567.7
Nickel NC 43.8545 FW(7Q10s) 405.1463 µg/L _
16 0 6.7 Chronic (FW) 326.8 No RP, Predicted Max< 50% of Allowable Cw- No
Max MDL= 10 Monitoring required
--------- -----------------------------
Nickel NC 25.0000 WS(7Q10s) µg/L NO DETECTS Chronic (WS) 186.3
Max MDL= 10
Acute: 354.9
Selenium NC 5 FW(7Q10s) 56 ug/L 3 2 30.0 __
Note: n<_9 C.V. (default) Chronic: 37.3 Limited Dataset-two values detected at 10 ug/L
Limited data set No value >Allowable Cw which was the PQL. - No monitoring required.
Acute: 2.761
Silver NC 0.06 FW(7Q10s) 0.4357 ug/L 16 0 0.510
Chronic: 0.447 All values non-detect< 1 ug/L - no monitoring
NO DETECTS Max MDL= 1 required
Acute: 963.2 No RP, Predicted Max< 50% of Allowable Cw- No
Zinc NC 149.3159 FW(7QlOs) 151.9765 ug/L 15 15 56.7 Monitoring required
-- ---- -- ---------------------------Chronic: 1,112.E
No value >Allowable Cw
Acute: NO WQS
Bis (2-ethylhexyl) phthalate C 0.37 HH(Qavg) µg/L 18 8 214.12000
--Chronic: --- 21.05817 - ---------------------------
RP shown - apply Monthly Monitoring with Limit
1 values >Allowable Cw
Acute: NO WQS
Aluminum NC 87 FW(7QlOs) µg/L 11 11 661.50000
--Chronic: --- 648.29032 - ---------------------------
Aluminum SIU dropped in 2022 -See Fact Sheet
No value >Allowable Cw
20800 RPA 2023, rpa
Page 2 of 2 12/20/2023

Permit No. NCO020800
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/l Chronic FW, µg/l Acute SW, µg/1 Chronic SW, µg/1
(Dissolved) (Dissolved) (Dissolved) (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
2B.0200(e.g., arsenic at 10 µg/1 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^10.9151 [ln hardness]-3.1485}
Cadmium,Acute Trout waters WER*{1.136672-[ln hardness](0.041838)} e^{0.9151[In hardness]-3.62361
Cadmium,Chronic WER*{1.101672-[ln hardness](0.041838)} •e^{0.7998[ln hardness]-4.445 11
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]-1.460}
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. NCO020800
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/WOBELs 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.
1. To perform a RPA on the Freshwater hardness-dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q10(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. NCO020800
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)+s7Q10, cfs *Avg. Upstream Hardness,mg/L)
(Permitted Flow,cfs+s7Q10,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 I + { [Kpo] [ss('+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)—(s7Q 10) (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. NC0020800
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.
8. 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) 64.78 Average of 612019—912023 eDMRs
[Total as, CaCO31
Average Upstream Hardness (mg/L) 25 Default value used. Average of
[Total as, CaCO31 612019—912023 eDMRs< 25 mg/L
7Q 10 summer(cfs) 15 Historical;Previous Fact Sheet
1Q10(cfs) 12.41 Calculated in RPA
Permitted Flow(MGD) 1.5 NPDES Files
Date: 12/4/2023
Permit Writer: Nick Coco
Page 4 of 4

Coco, Nick A
From: Deamer, Nora
Sent: Thursday, December 7, 2023 7:15 PM
To: Coco, Nick A
Cc: Tarver, Fred; Raquet, Michelle M
Subject: Basin Planning comment on the Town of Andrews WWTP NC0020800
Follow Up Flag: Flag for follow up
Flag Status: Flagged
Hi Nick,
Fred Tarver,the Hiwassee River Basin planner, and I reviewed the draft Town of Andrews wastewater NPDES permit and
fact sheet (NC0020800).
The Town of Andrews WWTP discharges to the Valley River [AU# 1-52b], a trout classified stream which indicates that
there is a specific need for higher instream water quality to support and protect trout fish populations. Unfortunately,
there is no instream ambient water quality data available in the vicinity to assess the impacts of this discharge. The
closest station in over 10.5 miles downstream in segment [AU# 1-52c] at station F4000000.This station is monitored by
DWR when resource allow.The Hiwassee River Basin does not have a monitoring coalition so any additional instream
data would need to be collected by the discharger themselves.
Reviewing the effluent data and effluent limits compliance summaries provided in the fact sheet, several values were
concerning, especially since this is a trout classified stream.The high effluent concentrations and the high number of
ammonia,TSS and BOD limit violation could result in ecological impacts.The elevated fecal coliform is also a concern as
there is a downstream segment of Valley River that is class B waters (used for primary recreation) and is currently(2022
IR) impaired due to high fecal coliform concentrations.
The water quality conditions at the closest downstream station (F4000000) shows that the instream turbidity
concentrations exceed the trout standard of 10 NTUs, 8.3%of the time and the trout water temperature standard of
20°C, 25%of the time.The instream water quality data at station F4000000 also shows increasing total nitrogen levels
and elevated conductivity levels (about twice as high as the AMS station in Murphy(F2700000)). See graphs below.
Basinwide planning branch is requesting instream monitoring for Total Nitrogen (made up of NO2+NO3 and TKN),
Ammonia,Total Phosphorus, Dissolve Oxygen,Temperature, Conductivity,Turbidity,TSS, pH, and Fecal coliform
bacteria. This instream data would allow us to understand of the impacts from this poorly performing wastewater
treatment plant and document the improvements once the treatment plants enhancements/upgrades are
complete. We are very encouraged that they will be upgrading their treatment plant and feel this is an excellent use of
ARPA funds.
We would encourage them to upgrade their wastewaters treatment plant to reduce nutrients as much as possible as the
instream water quality trends show an increasing instream total nitrogen concentration.The Valley River flows into a
large reservoir which could become impacted by nutrients. We have documented several elevated pH and lower Secchi
readings in the reservoir which could be related to elevated biological productivity.
Station F4000000—Valley River at US 74/19/129 at Tomotla
F4000000-Total Nitrogen yearly mean and medians:
1

Pqq Station ID=F4DCOD00,Parameters=Total Nitrogen,Fracti—Total-Graph Builder-JMP — ❑ X
File Edit Tables Rows Cols DOE Analyze Graph Tools View Window Help
Al
&)Graph Builder 11
undo start over D.. � � W �nnll k �$ � &94�® f()
Enter column name �®
012 Columns wutl
v - Mean&Median VS.Year
Ill6 Year Wr
0,g ap Overlay
HUCYear
•N Rows Analyzed R'(Meank028 • Color
•N Values Analyzed R'(Medianr0.56
A N Non Detect Values Size
A Mean 0,7
A Median
A Std Dev Interval
A Max —Mean
A Min 0.6 • —Median
QPainls
Summary Statgtic
Errorintenel pip v f 0.5 o
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Interval Style Error Bar v v
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Statistic RMSE
©R'
Equation 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 20 Fre Pa
❑F Test Year q 9e
F4000000-Conductivity yearly mean and medians:
rameters=Spec ific conductance,Fraction=-Graph Builder-1N1P — ❑ X
File Edit Tables Rows Cols DOE Analyze Graph Tools View Window Help
i
-Graph Builder
Una_ Start Over Done ■ �.■LW■ „/In.'k P On Room
F 12 Columns 11LL
- Mean&Median vs.Year
Entercolumn name p
L HUC 8 Group X Wrap Overlay
A Year
•N Rows Analyzed R'(Mean):0.03 • Cobr
•N Values Analyzed R'(Mediank0A2
A N Non Detect Values Size
A Mean 60
A Median • • Interval
A Std Dev •
• ' —Mean
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A Min • • • • —Median
V 50
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Variables l>
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•
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Confidence 0 Fit 20
Prediction 1980 1985 1990 1995 2000 2005 2010 2015 20
Statistic RMSE Year Fire q Page
Station F2700000—Hiwassee River at US19 Bus at Murphy
2

F2700000—Conductivity yearly mean and medians:
N StationlD=F2700DD0,Parameters=Specific conductance,Fraction--Graph Builder-1MP — ❑
File Edit Tables Rows Cols DOE Analyze Graph Tools View Window Help
iallajw -Azw 4 _ oo - R ? 4 99 o4Pq + piEinao ,
ii-Graph Builder
Undo Start Over Done 017�tei W I„/I(��7� OP 0-- ir•9 U I O / a
F 12 Columns I�I�y
Mean&Median vs.Year
Enter column name p
L HUC_8 E:__ GroupX Wrap Overlay
•Year
•N Rows Analyzed R2(Mear%:o.at •
•N Values Analyzed R2(Med is n):0.25
•N Non Detect Values 30 Siz.
Mean
A Median • •
Interval
Std Dev •
�Max , —P1ean
Min • —Median
28
A �IPaints A •
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• • o
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26
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Variables P •
d =Line Of Fit •
- 24
Fit Polynomial
Degree Linear
Confiderm 0 Fit
Prediction 2010 2015 20
Statistic RMSE 'near Freq 'aq
This is a graph from Andy Painter's trend tool which divided the conductivity into flow bins and the results show that at
low flows the conductivity is much higher.This is when the instream water quality is most influenced by point sources.
Station F4000000—Conductivity
e.f— f—
100 F4000000-Specific conductance
90 v
o 80 0 v
v
70 v v v v v v
17
v
� .2 60 v 0 v v v ° � 0 00v
v v ° 0 00
0 50- v ® o o °O 0
0 Q A
40 0 °° °�o
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30 o 0 0 0 0 ° e Q vo
20
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (Z 0
O� O� O� O� O� C� C) O� O� O� O� O� O� Oz O� O� O� O� O� O� C) 01 01 O� O� O� O�
oi0oiloil oi'� oJb0h00oil oi0oi000O" OL ') OAOh00O� 00O°1 �O �� �ti �'� �bN NON N N ti0
�0 ,�0 poi �°� �°� \°1 �°1 ,�°1 �0 ,LO LO LO LOO LO LO LO LO LO LO LO LO LO LO LO LO ,LO ll0 ,LO LO LO
Activity Start Date
FlowBin —High3rd —Low3rd -Middle3rd High3rd v Low3rd Middle3rd
This graph also shows that the high temperatures (>20°C) generally occur during low flow conditions.
Station F4000000—Water Temperature
3

by�b High-1
30 F4000000-Water Temperature
v v o V g v v
`o 8mv v ° °0 � vo� w � w ° � °° v v ° ° v `
.� 20 v o° v v ° ° o ° ° w ©
J Z
`0 15 ° ° v ° ° v°
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vp ° ° VnA
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° °o L� ° ° ° ° ° Cm ° ° ° oLn
°° ° °
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n °
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O O CJ O O� O� O O� O O� Z) O O) O OZ O� O� O O O� O� O� O Z O O O� O� O�
oi0 oi'� oil oi3 oiD oih o�0 oil oil oi°i 00 O� O'L Oy Ote 0A' O' 00' �O'
.LO
Activity Start Date
FlowBin —High3rd —Low3rd —Middle3rd = High3rd -.7 Low3rd Middle3rd
Thank you for the opportunity to review and provide input on this permit and water quality conditions in Valley River.
Please let us know if you need any other information or clarifications.
Thank you,
Nora
Nora Deamer(she/her)
Basin Planner, Division of Water Resources, Planning Section
North Carolina Department of Environmental Quality
Office: [phone]
NEW EMAIL ADDRESS: [e-mail]
https.Ildeg.nc.gov/about/divisions/water-resources/water-planninq/basin-planning-branch
Physical Address:512 North Salisbury St.,Raleigh, NC,27604
Mailing Address: 1611 Mail Service Center, Raleigh, NC,27699-1611
D.p." nt of ErMronme W O-I
Email correspondence to and from this address is subject to the North
Carolina Public Records Law and may be disclosed to third parties.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
4

NCO020800 Andrews WWTP 11/29/2023
BOD monthly removal rate TSS monthly removal rate
Month RR(%) Month RR(%) Month RR(%) Month RR(%)
June-19 90.19 December-21 92.97 June-19 91.15 December-21 92.80
July-19 87.66 January-22 84.04 July-19 88.78 January-22 84.23
August-19 92.81 February-22 87.91 August-19 95.85 February-22 90.34
September-19 93.42 March-22 87.91 September-19 96.38 March-22 81.42
October-19 95.95 April-22 91.92 October-19 97.42 April-22 88.90
November-19 96.30 May-22 88.08 November-19 97.95 May-22 72.05
December-19 89.15 June-22 84.98 December-19 93.70 June-22 59.23
January-20 87.98 July-22 75.09 January-20 88.18 July-22 68.85
February-20 85.86 August-22 86.24 February-20 83.22 August-22 84.58
March-20 82.94 September-22 84.37 March-20 78.63 September-22 80.42
April-20 84.29 October-22 93.02 April-20 74.45 October-22 94.10
May-20 84.77 November-22 85.28 May-20 79.21 November-22 92.87
June-20 84.85 December-22 81.49 June-20 84.17 December-22 82.02
July-20 86.24 January-23 66.29 July-20 80.44 January-23 71.28
August-20 88.44 February-23 85.35 August-20 75.39 February-23 89.50
September-20 91.69 March-23 80.64 September-20 93.79 March-23 85.81
October-20 97.13 April-23 83.69 October-20 98.29 April-23 86.78
November-20 96.77 May-23 88.02 November-20 97.40 May-23 92.86
December-20 95.14 June-23 92.99 December-20 95.88 June-23 90.52
January-21 95.78 July-23 91.72 January-21 97.25 July-23 93.10
February-21 91.38 August-23 92.56 February-21 93.23 August-23 92.09
March-21 95.19 September-23 94.25 March-21 95.58 September-23 94.26
April-21 97.13 October-23 April-21 97.66 October-23
May-21 95.80 November-23 May-21 97.40 November-23
June-21 97.23 December-23 June-21 97.75 December-23
July-21 95.52 January-24 July-21 96.14 January-24
August-21 94.40 February-24 August-21 95.66 February-24
September-21 95.69 March-24 September-21 97.52 March-24
October-21 90.78 April-24 October-21 93.88 April-24
November-21 93.79 May-24 November-21 96.22 May-24
Overall BOD removal rate 89.48 Overall TSS removal rate 88.78

EPA Idendlkatlon Number NPOES Number Facility Name Outfall Number
2MW Andrews WWTP 1
rstimated foncentramn {It
Podutant Wieved P•esent in Discharge Known)
Nona N/A N/A N/A NIA
Sipature,lorgothy B.Wood
AG

NH3/TRC WLA Calculations
Facility: Andrews WWTP
PermitNo. NC0020800
Prepared By: Nick Coco
Enter Design Flow (MGD): 1.5
Enter s7Q10 (cfs): 15
Enter w7Q10 (cfs): 19
Total Residual Chlorine (TRC) Ammonia (Summer)
Daily Maximum Limit (ug/1) Monthly Average Limit(mg NH3-N/1)
s7Q10 (CFS) 15 s7Q10 (CFS) 15
DESIGN FLOW (MGD) 1.5 DESIGN FLOW (MGD) 1.5
DESIGN FLOW (CFS) 2.325 DESIGN FLOW (CFS) 2.325
STREAM STD (UG/L) 17.0 STREAM STD (MG/L) 1.0
Upstream Bkgd (ug/1) 0 Upstream Bkgd (mg/1) 0.22
IWC (%) 13.42 IWC (%) 13.42
Allowable Conc. (ug/1) 127 Allowable Conc. (mg/1) 6.0
Cap at 28 ug/L. Consistent with current limit.Maintain limit.
Consistent with current limit.Maintain limit.
Ammonia (Winter)
Monthly Average Limit(mg NH3-N/1)
Fecal Coliform w7Q10 (CFS) 19
Monthly Average Limit: 200/100m1 DESIGN FLOW (MGD) 1.5
(If DF >331; Monitor) DESIGN FLOW (CFS) 2.325
(If DF<331; Limit) STREAM STD (MG/L) 1.8
Dilution Factor(DF) 7.45 Upstream Bkgd (mg/1) 0.22
IWC (%) 10.90
Allowable Conc. (mg/1) 14.7
Consistent with current limit.Maintain limit.
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/l 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)
3. Monthly Avg limit x 5 = Daily Max limit(Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
Fecal Coliform
1. Monthly Avg limit x 2 =400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non-Muni)

12/5/23 WQS= 12 ng/L MERCURY WQBEL/TBEL EVALUATION V:2013-6
Facility Name
Andrews WWTP/NC0020800 No Limit Required
/Permit No.
MMP Required
Total Mercury 1631E PQL=0.5 ng/L 7Q10s = 586.600 cfs WQBEL= 1223.05 ng/L
Date Modifier Data Entry Value Permitted Flow= 3.750 47 ng/L
12/3/19 8.56 8.56 8.6 ng/L-Annual Average for 2019
4/1/20 5.3 5.3 5.3 ng/L-Annual Average for 2020
9/7/21 9.01 9.01 9.0 ng/L-Annual Average for 2021
12/6/22 4.84 4.84 4.8 ng/L-Annual Average for 2022
3/6/23 8.26 8.26 8.3 ng/L-Annual Average for 2023

Andrews WWTP/NC0020800
Mercury Data Statistics (Method 1631E)
2019 2020 2021 2022 2023
#of Samples 1 1 1 1 1
Annual Average, ng/L 8.6 5.3 9.0 4.84 8.26
Maximum Value, ng/L 8.56 5.30 9.01 4.84 8.26
TBEL, ng/L 47
WQBEL, ng/L 1223.0

MONITORING REPORT(MR)VIOLATIONS for: Report Date: 11/28/23 Page 1 of 9
Permit: NCO020800 MRS Betweei 11 - 2018 and12 - 2023 Region: % Violation Category:Limit Violation Program Category:
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO020800 FACILITY: Town of Andrews-Andrews WWTP COUNTY: Cherokee REGION: Asheville
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
06-2019 001 Effluent BOD,5-Day(20 Deg.C)- 06/08/19 5 X week mg/I 45 45.28 0.6 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent BOD,5-Day(20 Deg.C)- 06/15/19 5 X week mg/I 45 55.18 22.6 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent BOD,5-Day(20 Deg.C)- 06/22/19 5 X week mg/I 45 53.92 19.8 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent BOD,5-Day(20 Deg.C)- 06/30/19 5 X week mg/I 30 47.44 58.1 Monthly Average Proceed to
Concentration Exceeded Enforcement Case
07-2021 001 Effluent BOD,5-Day(20 Deg.C)- 07/31/21 5 X week mg/I 30 30.11 0.4 Monthly Average Proceed to
Concentration Exceeded Enforcement Case
11-2022 001 Effluent BOD,5-Day(20 Deg.C)- 11/05/22 5 X week mg/I 45 52.54 16.8 Weekly Average Proceed to NOV
Concentration Exceeded
11-2022 001 Effluent BOD,5-Day(20 Deg.C)- 11/12/22 5 X week mg/I 45 52.88 17.5 Weekly Average Proceed to NOV
Concentration Exceeded
11-2022 001 Effluent BOD,5-Day(20 Deg.C)- 11/19/22 5 X week mg/I 45 53.56 19.0 Weekly Average Proceed to NOV
Concentration Exceeded
11-2022 001 Effluent BOD,5-Day(20 Deg.C)- 11/26/22 5 X week mg/I 45 57.6 28.0 Weekly Average Proceed to NOV
Concentration Exceeded
11-2022 001 Effluent BOD,5-Day(20 Deg.C)- 11/30/22 5 X week mg/I 30 51.95 73.2 Monthly Average Proceed to NOV
Concentration Exceeded
12-2018 001 Effluent Chlorine,Total Residual 12/28/18 5 X week ug/I 28 43 53.6 Daily Maximum No Action, BPJ
Exceeded
02-2019 001 Effluent Chlorine,Total Residual 02/11/19 5 X week ug/I 28 34 21.4 Daily Maximum No Action, BPJ
Exceeded
02-2019 001 Effluent Chlorine,Total Residual 02/25/19 5 X week ug/I 28 39 39.3 Daily Maximum No Action, BPJ
Exceeded
03-2019 001 Effluent Chlorine,Total Residual 03/11/19 5Xweek ug/I 28 37 32.1 Daily Maximum No Action, BPJ
Exceeded
07-2019 001 Effluent Chlorine,Total Residual 07/09/19 5 X week ug/I 28 45 60.7 Daily Maximum No Action, BPJ
Exceeded

MONITORING REPORT(MR)VIOLATIONS for: Report Date: 11/28/23 Page 6 of 9
Permit: NCO020800 MRS Betweel 11 - 2018 and12 - 2023 Region: % Violation Category:Limit Violation Program Category:
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO020800 FACILITY: Town of Andrews-Andrews WWTP COUNTY: Cherokee REGION: Asheville
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
02-2023 001 Effluent Chlorine,Total Residual 02/17/23 5 X week ug/I 28 40 42.9 Daily Maximum No Action, BPJ
Exceeded
03-2023 001 Effluent Chlorine,Total Residual 03/02/23 5 X week ug/I 28 38 35.7 Daily Maximum No Action, BPJ
Exceeded
03-2023 001 Effluent Chlorine,Total Residual 03/03/23 5 X week ug/I 28 40 42.9 Daily Maximum No Action, BPJ
Exceeded
06-2023 001 Effluent Chlorine,Total Residual 06/23/23 5 X week ug/I 28 49 75 Daily Maximum No Action, BPJ
Exceeded
07-2023 001 Effluent Chlorine,Total Residual 07/19/23 5 X week ug/I 28 39 39.3 Daily Maximum No Action, BPJ
Exceeded
08-2023 001 Effluent Chlorine,Total Residual 08/15/23 5 X week ug/I 28 40 42.9 Daily Maximum No Action, BPJ
Exceeded
08-2023 001 Effluent Chlorine,Total Residual 08/17/23 5 X week ug/I 28 35 25 Daily Maximum No Action, BPJ
Exceeded
09-2023 001 Effluent Chlorine,Total Residual 09/06/23 5 X week ug/I 28 30 7.1 Daily Maximum No Action, BPJ
Exceeded
06-2019 001 Effluent Coliform, Fecal MF, MFC 06/08/19 5 X week #/100ml 400 1,053.22 163.3 Weekly Geometric Mean Proceed to
Broth,44.5 C Exceeded Enforcement Case
11-2019 001 Effluent Coliform, Fecal MF, MFC 11/16/19 5 X week #/100ml 400 7,841.03 1,860.3 Weekly Geometric Mean Proceed to
Broth,44.5 C Exceeded Enforcement Case
01-2020 001 Effluent Coliform, Fecal MF, MFC 01/04/20 5 X week #/100ml 400 612.13 53.0 Weekly Geometric Mean Proceed to
Broth,44.5 C Exceeded Enforcement Case
01-2020 001 Effluent Coliform, Fecal MF, MFC 01/18/20 5 X week #/100ml 400 5,502.41 1,275.6 Weekly Geometric Mean Proceed to
Broth,44.5 C Exceeded Enforcement Case
02-2019 001 Effluent Flow,in conduit or thru 02/28/19 Continuous mgd 1.5 1.7 13.3 Monthly Average Proceed to NOV
treatment plant Exceeded
06-2019 001 Effluent Nitrogen,Ammonia Total(as 06/30/19 5 X week mg/I 6 6.84 13.9 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
08-2019 001 Effluent Nitrogen,Ammonia Total(as 08/31/19 5 X week mg/I 6 9.43 57.1 Monthly Average Proceed to NOV
N)-Concentration Exceeded
09-2019 001 Effluent Nitrogen,Ammonia Total(as 09/21/19 5 X week mg/I 18 21.86 21.4 Weekly Average Proceed to
N)-Concentration Exceeded Enforcement Case

MONITORING REPORT(MR)VIOLATIONS for: Report Date: 11/28/23 Page 7 of 9
Permit: NCO020800 MRS Betweel 11 - 2018 and12 - 2023 Region: % Violation Category:Limit Violation Program Category:
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO020800 FACILITY: Town of Andrews-Andrews WWTP COUNTY: Cherokee REGION: Asheville
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
09-2019 001 Effluent Nitrogen,Ammonia Total(as 09/28/19 5 X week mg/I 18 21.54 19.7 Weekly Average Proceed to
N)-Concentration Exceeded Enforcement Case
09-2019 001 Effluent Nitrogen,Ammonia Total(as 09/30/19 5 X week mg/I 6 17.33 188.8 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
10-2019 001 Effluent Nitrogen,Ammonia Total(as 10/12/19 5 X week mg/I 18 18.78 4.3 Weekly Average Proceed to
N)-Concentration Exceeded Enforcement Case
10-2019 001 Effluent Nitrogen,Ammonia Total(as 10/31/19 5 X week mg/I 6 15.35 155.8 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
07-2020 001 Effluent Nitrogen,Ammonia Total(as 07/31/20 5 X week mg/I 6 8.83 47.2 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
08-2020 001 Effluent Nitrogen,Ammonia Total(as 08/31/20 5 X week mg/I 6 9.1 51.6 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
07-2021 001 Effluent Nitrogen,Ammonia Total(as 07/31/21 5 X week mg/I 6 9.1 51.6 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
08-2021 001 Effluent Nitrogen,Ammonia Total(as 08/31/21 5 X week mg/I 6 8.12 35.3 Monthly Average Proceed to NOV
N)-Concentration Exceeded
10-2021 001 Effluent Nitrogen,Ammonia Total(as 10/31/21 5 X week mg/I 6 7.42 23.7 Monthly Average Proceed to NOV
N)-Concentration Exceeded
05-2022 001 Effluent Nitrogen,Ammonia Total(as 05/31/22 5 X week mg/I 6 6.57 9.4 Monthly Average Proceed to NOV
N)-Concentration Exceeded
06-2022 001 Effluent Nitrogen,Ammonia Total(as 06/30/22 5 X week mg/I 6 12.58 109.7 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
07-2022 001 Effluent Nitrogen,Ammonia Total(as 07/31/22 5 X week mg/I 6 11.74 95.8 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
08-2022 001 Effluent Nitrogen,Ammonia Total(as 08/31/22 5 X week mg/I 6 9.75 62.5 Monthly Average Proceed to NOV
N)-Concentration Exceeded
09-2022 001 Effluent Nitrogen,Ammonia Total(as 09/24/22 5 X week mg/I 18 18.5 2.8 Weekly Average Proceed to NOV
N)-Concentration Exceeded
09-2022 001 Effluent Nitrogen,Ammonia Total(as 09/30/22 5 X week mg/I 6 17.84 197.4 Monthly Average Proceed to NOV
N)-Concentration Exceeded
10-2022 001 Effluent Nitrogen,Ammonia Total(as 10/01/22 5 X week mg/I 18 31.34 74.1 Weekly Average Proceed to NOV
N)-Concentration Exceeded

MONITORING REPORT(MR)VIOLATIONS for: Report Date: 11/28/23 Page 8 of 9
Permit: NCO020800 MRS Betweel 11 - 2018 and12 - 2023 Region: % Violation Category:Limit Violation Program Category:
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO020800 FACILITY: Town of Andrews-Andrews WWTP COUNTY: Cherokee REGION: Asheville
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
10-2022 001 Effluent Nitrogen,Ammonia Total(as 10/08/22 5 X week mg/I 18 21.16 17.6 Weekly Average Proceed to NOV
N)-Concentration Exceeded
10-2022 001 Effluent Nitrogen,Ammonia Total(as 10/15/22 5 X week mg/I 18 22.88 27.1 Weekly Average Proceed to NOV
N)-Concentration Exceeded
10-2022 001 Effluent Nitrogen,Ammonia Total(as 10/22/22 5 X week mg/I 18 26.22 45.7 Weekly Average Proceed to NOV
N)-Concentration Exceeded
10-2022 001 Effluent Nitrogen,Ammonia Total(as 10/29/22 5 X week mg/I 18 23.72 31.8 Weekly Average Proceed to NOV
N)-Concentration Exceeded
10-2022 001 Effluent Nitrogen,Ammonia Total(as 10/31/22 5 X week mg/I 6 23.6 293.3 Monthly Average Proceed to NOV
N)-Concentration Exceeded
11-2022 001 Effluent Nitrogen,Ammonia Total(as 11/30/22 5 X week mg/I 14.7 22.98 56.4 Monthly Average Proceed to NOV
N)-Concentration Exceeded
05-2023 001 Effluent Nitrogen,Ammonia Total(as 05/31/23 5 X week mg/I 6 7.9 31.7 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
06-2023 001 Effluent Nitrogen,Ammonia Total(as 06/30/23 5 X week mg/I 6 11.37 89.5 Monthly Average Proceed to
N)-Concentration Exceeded Enforcement Case
07-2023 001 Effluent Nitrogen,Ammonia Total(as 07/31/23 5 X week mg/I 6 8.93 48.8 Monthly Average Proceed to NOV
N)-Concentration Exceeded
08-2023 001 Effluent Nitrogen,Ammonia Total(as 08/31/23 5 X week mg/I 6 10.98 83.0 Monthly Average Proceed to NOV
N)-Concentration Exceeded
09-2023 001 Effluent Nitrogen,Ammonia Total(as 09/30/23 5 X week mg/I 6 15.95 165.8 Monthly Average None
N)-Concentration Exceeded
06-2019 001 Effluent Solids,Total Suspended- 06/08/19 5 X week mg/I 45 53.5 18.9 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent Solids,Total Suspended- 06/15/19 5 X week mg/I 45 58.86 30.8 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent Solids,Total Suspended- 06/22/19 5 X week mg/I 45 69.38 54.2 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent Solids,Total Suspended- 06/29/19 5 X week mg/I 45 84.4 87.6 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2019 001 Effluent Solids,Total Suspended- 06/30/19 5 X week mg/I 30 66.54 121.8 Monthly Average Proceed to
Concentration Exceeded Enforcement Case

MONITORING REPORT(MR)VIOLATIONS for: Report Date: 11/28/23 Page 9 of 9
Permit: NCO020800 MRS Betweel 11 - 2018 and12 - 2023 Region: % Violation Category:Limit Violation Program Category:
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO020800 FACILITY: Town of Andrews-Andrews WWTP COUNTY: Cherokee REGION: Asheville
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
06-2021 001 Effluent Solids,Total Suspended- 06/30/21 5 X week mg/I 30 33.8 12.7 Monthly Average Proceed to NOV
Concentration Exceeded
07-2021 001 Effluent Solids,Total Suspended- 07/10/21 5 X week mg/I 45 55.12 22.5 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
07-2021 001 Effluent Solids,Total Suspended- 07/31/21 5 X week mg/I 30 33.24 10.8 Monthly Average Proceed to
Concentration Exceeded Enforcement Case
10-2021 001 Effluent Solids,Total Suspended- 10/31/21 5 X week mg/I 30 30.18 0.6 Monthly Average Proceed to NOV
Concentration Exceeded
05-2022 001 Effluent Solids,Total Suspended- 05/31/22 5 X week mg/I 30 30.15 0.5 Monthly Average Proceed to NOD
Concentration Exceeded
06-2022 001 Effluent Solids,Total Suspended- 06/25/22 5 X week mg/I 45 79.94 77.6 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2022 001 Effluent Solids,Total Suspended- 06/30/22 5 X week mg/I 30 55.08 83.6 Monthly Average Proceed to
Concentration Exceeded Enforcement Case
07-2022 001 Effluent Solids,Total Suspended- 07/02/22 5 X week mg/I 45 94.2 109.3 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2023 001 Effluent Solids,Total Suspended- 06/24/23 5 X week mg/I 45 47.5 5.6 Weekly Average Proceed to
Concentration Exceeded Enforcement Case
06-2023 001 Effluent Solids,Total Suspended- 06/30/23 5 X week mg/I 30 40.99 36.6 Monthly Average Proceed to
Concentration Exceeded Enforcement Case

Whole Effluent Toxicity Testing and Self Monitoring Summary
Allvac-Monroe Plant NCO045993/001 County: Union Region: MRO Basin: YAD14 Feb May Aug Nov SOC JOC:
Ceri7dPF Begin: 6/1/2014 chr lim:52%(May& NonComp: Single 70.10: 0.27 PF: na IWC: 49.1 Freq: Q
J F M A M J J A S O N D
2019 - Pass - - Pass - - Pass - - Pass -
2020 - Pass - - Pass - - Pass - - Pass -
2021 - Pass - - INVALID - Pass Pass - - Pass -
2022 - Pass - - Pass - - Pass - - Pass -
2023 - Pass - - Pass - - Pass - - - -
American Truetzschler,Inc. NCO085928/001 County: Mecklenburg Region: MRO Basin: CTB34 Feb May Aug Nov SOC JOC:
Ceri7dPF Begin: 5/1/2021 chr lim:90% + NonComp: Single 7Q10: 0.0 PF: 0.05 IWC: 100 Freq: Q
J F M A M J J A S O N D
2019 - Pass - - Pass - - Pass - - Invalid Pass
2020 - Pass - - Pass Pass - - Pass - - Fail Pass
2021 H Fail 63.6 31.863.6 63.6 Pass - - Pass - - - -
Andrews WWTP NCO020800/001 County: Cherokee Region: ARO Basin: HIW02 Mar Jun Sep Dec SOC JOC:
Ceri7dPF Begin: 9/1/2019 chr lim:13% NonComp: Single 7Q10: 15.0 PF: 1.5 IWC: 13.0 Freq: Q
J F M A M J J A S O N D
2019 - - Pass - - Pass - - Pass - - Pass
2020 - - Pass - - Pass - - Pass - - Pass
2021 - - Pass - - Pass - - Pass - - Pass NR
2022 - - Pass - - Pass - - Pass <3.25 - Pass>52>52
2023 - - >52 Pass - - >52 Pass - - - - - -
Anson Co.WWTP NCO041408/001 County: Anson Region: FRO Basin: YAD16 Jan Apr Jul Oct SOC JOC:
Ceri7dPF Begin: 8/1/2020 chr lim:3% NonComp: Single 7Q10: 175.5 PF: 3.5 IWC: 2.99 Freq: Q
J F M A M J J A S O N D
2019 Pass - - Pass - - Pass - - Pass - -
2020 Pass - - Pass - - Pass - - Pass - -
2021 Pass - - Pass - - Pass - - Pass - -
2022 Pass - - Pass>12(P) - - Pass >12 - >12 Pass - -
2023 Pass >12 - Pass - - Pass - - - - -
Anson County WTP NCO074390/001 County: Anson Region: FRO Basin: YAD16 Jan Apr Jul Oct SOC JOC:
Ceri7dPF Begin: 6/1/2014 Chr Monit: 90% NonComp: 7Q10: PF: 0.750 IWC: Freq: Q
J F M A M J J A S 0 N D
2019 Fail - - Pass - - Pass - - Pass - -
2020 Pass - - Pass - - - - - Pass - -
2021 Pass - - Pass - - Pass - - Pass - -
2022 Pass - - Pass - - Pass - - Fail - -
2023 Pass - - Pass - - Pass - - - - -
Legend: P=Fathead minnow(PimDhales Dromelas).H=No Flow(facilitv is active).s=SDIIt test between Certified Labs Page 2 of 115

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 NCO020800 I11 121 23/04/25 I17 18I� I 19 I .l I 201 I
21111I 1 1 I I I I II I I I I I I I I I I I I 1 I I I I I I I I I I II I I I I I r6
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ----------------------Reserved-------------------
67 70 J 71 Ity 72 L-J 73 1 74 79 I I I I 80
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) 10:30AM 23/04/25 19/09/01
Andrews WWTP
Reagan Ave Exit Time/Date Permit Expiration Date
Andrews NC 28901 12:30PM 23/04/25 23/08/31
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
Timothy Brian Wood/ORC/828-557-8630/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Michael Ladd,PO Box 1210 Andrews NC 289011210//828-321-3113/
No
Section C:Areas Evaluated During Inspection (Check only those areas evaluated)
Permit 0 Flow Measurement Operations&Maintenar 0 Records/Reports
Self-Monitoring Progran
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
Melanie Kemp DWR/ARO WQ/ - - /
Daniel J Boss DWR/ARO WQ/828-296-4658/
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 (Cont.) 1
31 NCO020800 I11 12I 23/04/25 117 18 i c i
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
On April 25, 2023, Tristan Odekirk (EPA), Melanie Kemp, and I (Daniel Boss) conducted a
Compliance Evaluation Inspection of the Andrews WWTP. Tim Wood (ORC) and Zachary Mills
(BORC)were present for the inpsection.
The influent sampler measured 10C, the temperature of the sampler should be between OC and 6C.
The influent pump station has only 2 of 3 pumps installed and operating at the moment. The pumps
can only be run one at a time in manual mode because the control panel doesn't work. This presents
a risk for a sewage overflow since a back up pump will not turn on in the event that the operating
pump has a failure. This is also causing difficulty for the plant to treat ammonia. Because they can
only run one pump at a time, it's limiting their ability to recirculate the trickling filter effluent back to the
pump station, which limits the ammonia removal (conversion to nitrate). The construction for a new
influent pump is scheduled to begin in early summer. This is a critical repair/upgrade for this facility.
The South trickling filter distribution arm-rotator is now also broken (North trickling filter distributor has
been broken since 2021), so neither trickling filter is receiving proper distribution or recirculation.
The chlorine contact chamber had a 2-2.5' sludge blanket out of 4' depth. This is unacceptable. The
chlorine contact chamber needs to be pumped out more frequently to prevent solids from discharging
throught the outfall.
The chlorine contact chamber had overflowed just a few days prior to this inspection and it was not
reported to the State. Any overflow of any process in the WWTP is considered a bypass and needs
to be reported to the State under Part II (E)6.a. of the NPDES Permit Standard Conditions. According
to Tim Wood the overflows at the contact chamber are caused by an under-sized effluent line.
Page# 2

Permit: NCO020800 Owner-Facility: Andrews WWTP
Inspection Date: 04/25/2023 Inspection Type: Compliance Evaluation
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:
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? 0 ❑ ❑ ❑
#Are there any special conditions for the permit? ❑ ■ ❑ ❑
Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑
Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑
Comment:
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? 0 ❑ ❑ ❑
Is all required information readily available, complete and current? 0 ❑ ❑ ❑
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? 0 ❑ ❑ ❑
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 0 ❑ ❑ ❑
classification?
Page# 3

Permit: NCO020800 Owner-Facility: Andrews WWTP
Inspection Date: 04/25/2023 Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Is a copy of the current NPDES permit available on site? 0 ❑ ❑ ❑
Facility has copy of previous year's Annual Report on file for review? ❑ ❑ ❑
Comment: The ORC log needs to include signature of the ORC or BORC for the daily visits and
checks.
Flow Measurement - Effluent Yes No NA NE
# Is flow meter used for reporting? 0 ❑ ❑ ❑
Is flow meter calibrated annually? 0 ❑ ❑ ❑
Is the flow meter operational? 0 ❑ ❑ ❑
(If units are separated) Does the chart recorder match the flow meter? ❑ ❑ ❑
Comment:
Pump Station - Influent Yes No NA NE
Is the pump wet well free of bypass lines or structures? 0 ❑ ❑ ❑
Is the wet well free of excessive grease? ❑ ❑ ❑ ■
Are all pumps present? ❑ 0 ❑ ❑
Are all pumps operable? ❑ 0 ❑ ❑
Are float controls operable? ❑ 0 ❑ ❑
Is SCADA telemetry available and operational? ❑ 0 ❑ ❑
Is audible and visual alarm available and operational? ❑ ❑ ❑ ■
Comment: The influent PS can only run one pump at a time in manual mode. The active pump is
alternated. This is a precarious situation because if the active pump trips out, the plant
will have an overflow. Also this greatly limits the amount of recirculation through the
trickling filters, which is important for reducing ammonia in the effluent.
Influent Sampling Yes No NA NE
# Is composite sampling flow proportional? ❑ 0 ❑ ❑
Is sample collected above side streams? ❑ ❑ ❑
Is proper volume collected? ❑ ❑ ❑ ■
Is the tubing clean? ❑ ❑ ❑ ■
# 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: The sampler temperature was 10 degrees C. The temperature should be between 0-6
degrees C.
Page# 4

Permit: NC0020800 Owner-Facility: Andrews WWTP
Inspection Date: 04/25/2023 Inspection Type: Compliance Evaluation
Bar Screens Yes No NA NE
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:
Trickling Filter Yes No NA NE
Is the filter free of ponding? ■ ❑ ❑ ❑
Is the filter free of leaks at the center column of filter's distribution arms? ❑ ❑ ❑ ■
Is the distribution of flow even from the distribution arms? ❑ ■ ❑ ❑
Is the filter free of uneven or discolored growth? ❑ ❑ ❑ ■
Is the filter free of sloughing of excessive growth? ❑ ❑ ❑ ■
Are the filter's distribution arms orifices free of clogging? ■ ❑ ❑ ❑
Is the filter free of excessive filter flies, worms or snails? ❑ ■ ❑ ❑
Comment: The distribution arms for both trickling filters don't rotate, causing uneven distribution.
There were a lot of filter flies on the trickling filters. The lack of controls at the influent
pump prevents staff from increasing the recirculation of the trickling filter effluent.
Secondary Clarifier Yes No NA NE
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) ■ ❑ ❑ ❑
Comment: The sludge blanket was only about 1' of 17' depth.
Page# 5

Permit: NCO020800 Owner-Facility: Andrews WWTP
Inspection Date: 04/25/2023 Inspection Type: Compliance Evaluation
Secondary Clarifier Yes No NA NE
Disinfection-Gas Yes No NA NE
Are cylinders secured adequately? ■ ❑ ❑ ❑
Are cylinders protected from direct sunlight? 0 ❑ ❑ ❑
Is there adequate reserve supply of disinfectant? 0 ❑ ❑ ❑
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? ❑ ❑ 0 ❑
If yes, then what is the EPA twelve digit ID Number? (1000- - )
If yes, then when was the RMP last updated?
Comment: There was a 2-2.5' sludge blanket out of 4' depth in the contact chamber. The contact
chamber needs to be pumped more frequently to keep the solids low.
De-chlorination Yes No NA NE
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? ❑ ❑ ❑
Comment:
Are the tablets the proper size and type? ❑ ❑ 0 ❑
Are tablet de-chlorinators operational? ❑ ❑ ■ ❑
Number of tubes in use?
Comment:
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional? 0 ❑ ❑ ❑
Is sample collected below all treatment units? 0 ❑ ❑ ❑
Is proper volume collected? ❑ ❑ ❑
Is the tubing clean? ❑ ❑ ❑ ■
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 0 ❑ ❑ ❑
degrees Celsius)?
Page# 6

Permit: NC0020800 Owner-Facility: Andrews WWTP
Inspection Date: 04/25/2023 Inspection Type: Compliance Evaluation
Effluent Sampling Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type ❑ ❑ ❑
representative)?
Comment:
Page# 7

Whole Effluent Toxicity Testing and Self Monitoring Summary
Allvac-Monroe Plant NCO045993/001 County: Union Region: MRO Basin: YAD14 Feb May Aug Nov SOC JOC:
Ceri7dPF Begin: 6/1/2014 chr lim:52%(May& NonComp: Single 70,10: 0.27 PF: na IWC: 49.1 Freq: Q
J F M A M J J A S O N D
2019 - Pass - - Pass - - Pass - - Pass -
2020 - Pass - - Pass - - Pass - - Pass -
2021 - Pass - - INVALID - Pass Pass - - Pass -
2022 - Pass - - Pass - - Pass - - Pass -
2023 - Pass - - Pass - - Pass - - - -
American Truetzschler,Inc. NCO085928/001 County: Mecklenburg Region: MRO Basin: CTB34 Feb May Aug Nov SOC JOC:
Ceri7dPF Begin: 5/1/2021 chr lim:90% + NonComp: Single 70,10: 0.0 PF: 0.05 IWC: 100 Freq: Q
J F M A M J J A S O N D
2019 - Pass - - Pass - - Pass - - Invalid Pass
2020 - Pass - - Pass Pass - - Pass - - Fail Pass
2021 H Fail 63.6 31.8 63.6 63.6 Pass - - Pass - - - -
Andrews WWTP NCO020800/001 County: Cherokee Region: ARO Basin: HIW02 Mar Jun Sep Dec SOC JOC:
Ceri7dPF Begin: 9/1/2019 chr lim:13% NonComp: Single 7Q10: 15.0 PF: 1.5 IWC: 13.0 Freq: Q
J F M A M I J A S O N D
2019 - - Pass - - Pass - - Pass - - Pass
2020 - - Pass - - Pass - - Pass - - Pass
2021 - - Pass - - Pass - - Pass - - Pass NR
2022 - - Pass - - Pass - - Pass <3.25 - Pass>52>52
2023 - - >52 Pass - - >52 Pass - - Pass 36.8 - -
Anson Co.WWTP NCO041408/001 County: Anson Region: FRO Basin: YAD16 Jan Apr Jul Oct SOC JOC:
Ceri7dPF Begin: 8/1/2020 chr lim:3% NonComp: Single 70,10: 175.5 PF: 3.5 IWC: 2.99 Freq: Q
J F M A M J J A S O N D
2019 Pass - - Pass - - Pass - - Pass - -
2020 Pass - - Pass - - Pass - - Pass - -
2021 Pass - - Pass - - Pass - - Pass - -
2022 Pass - - Pass>12(P) - - Pass >12 - >12 Pass - -
2023 Pass >12 - Pass - - Pass - - Pass - -
Anson County WTP NCO074390/001 County: Anson Region: FRO Basin: YAD16 Jan Apr Jul Oct SOC JOC:
Ceri7dPF Begin: 6/1/2014 Chr Monit: 90% NonComp: 70,10: PF: 0.750 IWC: Freq: Q
J F M A M J J A S O N D
2019 Fail - - Pass - - Pass - - Pass - -
2020 Pass - - Pass - - - - - Pass - -
2021 Pass - - Pass - - Pass - - Pass - -
2022 Pass - - Pass - - Pass - - Fail - -
2023 Pass - - Pass - - Pass - - - - -
Leeend: P=Fathead minnow(Pimohales oromelas).H=No Flow(facilitv is active).s=Split test between Certified Labs Page 2 of 115

. ma 11A1 " om PO Box 7565
Asheville,NC 29802
Phone: [phone]
Fax: [phone]
rm'.xn.,.w RsY..e SNrwOni..c
Effluent Toxicity Report Form-Chronic Fathead Minnow Multi-Concentration Test Date: October 31,2022
Facility: Earth Environmental Services,Inc. NPDES Ft: NC 0020800 Pipe a: 001 County: Cherokee
Andrews WWTP
LaboraltoryPrrforrningTest: Environmental Testing Solutions,Inc.,Certificate8037 Comments Perhogencmkomoeseved
Signature of Operator in Responsible Chargr(ORCI: on min-i-rik +colcwnr.horu.
ORC Phone/E-mail: gig SSA p O project a: 17295
Signaturr of t aboratory Supervisor Sampe a 221W3 01.222005 33,22100102
e-Mail to: ATForms.AT80ncdenr.gov Test Organisms: Pimephales promelas
Or Mail Original to: North CaraCna Division of water Resources 5�pplwr
Water Sciences Section/Aquatic Tozkolcgir Branch in-house culture
1621 Mail Service Center Begin hatch: 10-03-22 1445
Raikigh,NC 2 7 699-162 1 End hatch: 1 10-04-22 05W
Test Start Date: I October 04,2022
Replicate number
1 2 3 4
Control Surviving number of larvae 10 10 10 10 Survival(x) 100.0
Organisms joriginall number ofiarvae 10 10 10 10 Average wit imo 0.f186
Weight/origmal(mg/larvae) 0.852 0.847 0.932 0.911 Averagewtl 0.ft86
surviving(mq
•Emu" Surviving number of larvae 7 8 5 1
3.25% 10rigirial number of larvae 10 10 10 10 SWAM(%) 10
weight/original(mg/larvae) 0.399 0.527 0.255 0.088 Avaragrwt(rrtg) 0.317
%Effluent Surviving number of larvae 6 4 7
6
E63% Original number of larvae 10 10 30 LO Survivalf%) 57.5
weight/orginal(mg/tare") 0.358 0.234 0.414 0.376 -raw-(mg) 1 0.346
%Effl�uent, surviving number of larvae 6 3 6 4
U% original number of larvae 10 10 10 10 Survival(%) 47.5
weight)orginai(mloarvae) 1 0.356 1 0.183 1 0.323 0.219 Average-(mg) 0.270
•Effluent Isurviving number of larvae 7 6 6 7
26% ongnal number of larvae 1 10 10 1 10 10 Survival(%) 650-
weight/original(mg/larvae) 1 0.438 0.354 0.422 0,430 Average-(mg) 0.411
%Effluent Surviving number of larvae 9 9 8 5
S2% Original number of larvae 10 10 10 10 Survval Mi 77.5
weight/oneinal(mearvae) 1 0.588 1 0.596 1 0.559 10.380 Average-(mg) OS31
Water Quality Data
oay o I my 1 Day z 1 Derr 3 oary 4 ovy s Day 6
Initial I Final Initial I Final Initial I Final I Initial Final Inirol final initial Final initial Wial
Control
pH(SUI� 7.5] 696 7.18 6.77 7.56 6.% 7.33 6.93 7.64 109 76t 698 7.61 7.07
00(m9A): 1 7.6 1 7.7 77 1 5.9 7.8 7.4 7.6 7.3 77 6-5 7.7 7.3 7.7 6.0
Temp.(*Cl: 1 24.8 1 24.4 24.7 24.3 24.8 246 24.9 25.1 24.7 24.8 24.8 247 24,7 24.6
HI`h Concentration
pH4SU): 7.27 1 709 7.19 6.93 7.10 6.93 7.03 6.92 6.90 ?.Or, 740 706 731 Z07
DO(mgA): 7.7 7.9 So 5.3 77 7.7 8.1 6A 7 5 6-6 7A 7.2 3.0 54
Temp.(*Cl: 1 24.6 24.4 24.8 24.7 24.9 245 247 24.9 24.8 24.9 24.9 24.6 11.9 24.9
Sample Information sample 1 Sampie 2 Sample 3 contra Analyses Survival Growth
Collection start date: 10-02-22 10,04-22 10-06-22 Normal'. yea Yes
Grab: Hom var Yes Yes
Comomtteduration: 24-h 24-h 24.2Sh NOEL <3.25% <3.25%
Alkalinity(mg/L CaCOJ: 97 96 90 60 61 LOEC 3 25% 3.25%
Hardness(mg/L CaCOsi: 61 65 40 85-89 Chv: <3,25% <3.25%
Conductiiony(Nmhostoril: 1 330 1 364 I 356 300-317 Method: Swel's Dunnett's
Total residual chlorinefmg/Ll: c 0.10
Sample Temp.at Receipt 1% 1.9 13 1 1.2 Survival Growth
%Effluent Critical CalcuUteO Critical Calculated
3.25% 10.000 10.000 2.410 7 992
6-5% 10.000 10,000 2.410 7 500
13% 10.000 l0.txx) 2.410 8 545
26% 10.ODO 1o.0oo 2.410 6.590
Overall Analysis: 52% 10.000 10.000 2.410 4.927
Result: FAIL LOEC: 3.25% NOEC: <3.25% ChV: <3.25%
DWR Report Form AT-S

PO Box 7565
• Asheville,NC 28802
Phone: [phone]
Fax: [phone]
few"so4­,.
Effluent Toxicity Report Form-Chronic Fathead Minnow Multl-Concentration Test Date: December 19,2022
Facility: Earth Environmental Services,Inc. NPDES#: NC 0020800 Pipe#: 001 County. Cherokee
Andrews WWTP
Laboratory Performing Test. Environmental Testing Soluti ins,Inc.,Certificate N 037 Comments
Signature of Operator in Responsible Charge(ORC):
RC Phone/E-mail: JeA I-SS- Project a: 17454
Signature of Laboratory Supervisor: Sample a: l7tlbsAl,771107 70,1111ba og
e-Mall to: ATForms-ATagbncdenr.aov I Test Organisms: oimepholes profne/as
Or Mail Original to: North Carolina Division of Wager Resources Supplier
water Sciences section/Aquatic Toxicology!ranch louse culture
1621 Mail Service Center Begin hatch: 12-05.22 1455
Rale
igh,NC 27699.1621 End hatch. 12-0612 0500
Test Start Date: I December 06,2022
Replicate number
1 2 3 4
71
Control Surviving number of lame 10 10 10 10 Survival(-A) 100.0 rva
Organisms 10riginal number of larvae 1 10 1 10 10 10 A-age wt Irng) 0.799
weight/original(nearvao) 1 0.681 1 0.772 1 0.765 1 0.976 Average wt1 0.799
survNing Imig]
%Effluent 15urviving number of larvae 10 10 10 1 10
3.25% ongnal number of larvae 10 10 10 1 10 survival(W 100.0
werghtJanginal(mg/tarvae) 0.693 0.695 0.765 1 0.737 Average wt lmgl 0.723
%Effluent I Surviving number of larvae 10 10 10 10
F6-.S---1 lovrial number 01 larvae 10 10 10 30 sur"WA(%I 100.0
WeIgWonglnal Irng/larvae) 1 0.795 0.666 0.805 1 0.620 Average wt(nVl 0.722
%Effluent jsurvrvngnumberof larvae 1 10 1 10 10 1 10
13% I Oritinsi number of larvae 10 1 10 10 10 Survival(-Al 100.0
walght/onginallmigAarvaa) 0.727 1 0-683 0.863 0.719 Average wt[mill 0.748
%Effluent survrwrig num6#rof larva# 10 1 9 1 10 10
26% ominal number of larvae 10 1 10 1 10 1-6- Survival(%) F 973
weight/orlgirnllmylarvae► 1 0.709 1 0-643 1 0.727 1 0.813 Averagewt[mgl 0.723
%Effluent 15LOvWg num4er of larvae 9 30 10 10
F;'__1 I original number of larva# 10 10 10 10 survival t%► 97.5
Weight/onginal InVarvae) 0.730 0.635 0.679 1 OW Average wt[mill 1 0.674
Water Quality Data
flay 0 pay 1 Wy 2 Day 3 Clay a flay S Oay 6
Initial Final Initial final Inmal Final Initial Final Initial Final Initial Final Initial I R-W
Control
PH(su): 7.29 7.23 7.27 7-16 7.44 7.24 7.26 7.16 7.22 7.22 7.15 7.17 726 7.12
DO In7.8 7.8 7.7 7.3 7.7 72 7.8 7.9 7.8 7.4 T7 7.5 7.9 7.5
Temp.('C): 74A 248 248 24.7 24.8 24.7 24.7 247 248 245 243 247 24,8 24.6
High Concentration
PH(Su): 7.29 7.19 7,31 T.04 719 711 7.22 712 7,21 7.18 729 7.13 727 7.07
00 img/Ll: 7.7 7.9 7.9 74 7.9 72 8.0 7.5 8.1 7.2 7.9 73 BA 7.2
Temp("q 25.0 24.7 25.0 24.7 25.0 24.5 24.8 24.8 249 146 24.9 24.5 24.8 24.5
Sample Information Sample 1 Sample 2 Sample 3 control Analyses Survival Growth
Collection start date: 12-04.22 12-06.22 12-06.22 Normal: Yes Yes
Grab: Hom.var. Yes Yes
Compositedursticri: 24-h 22.25vh 22.5-h NOEC: S2% 51%
Allrianxy(mgA Ca=j: 63 59 65 62.63 LOEC: >52% >52%
Wrdnen(mg/LCaC031: 61 67 80 8488 Chv: >S2% '52%
Conductivity(Pmlws/cm): 2S8 1 186 209 300.312 Method: I Visual Insp. Dunrrett's
Total residual chlorine(mgAJ: <0.10 <0-10 <0.10
Sample Temp.at Raoalpt I'C►: 0,6 2.1 1 03 -val Growth
*A Effluent Critical Calculated Crrbcal Calculated
3.25% 2.410 1.343
6.5% 2.410 1.362
13% 2.410 0.993
26% 2.410 1.335
Overall Analysis: 52% 2.420 2.210
Result: PASS LOEC: >52% NOEC: 52% ChV: >52%
DWR Report Form AT-5

* PC)so*7%5
Asheville.NC 28802
Phone- [phone]
fax [phone]
Effluent Toxicity Report Form.Chronic Fathead Minnow h]ulti-Concenttatton Test late_ March 1' 3
fvOirv. Earth Environmental Services,Inc. NPOESO taC 0020800 -::=a 001 c rt f _ Cherokee
Andrews WWTP
ubxstuy rest Environmental Test,ngSoe.t!to .Inc.cert,tC2-te a�37
5*Uatave e/OPrtafain RewonsAor Chyxae{DRL?
ORCRtwieJfriisx: 9��cSS/^�� f ✓ f�lG?��( I- �) ' acta ?s53
S�iM1Ctf dl tA!?6.'i'Gr•:'.::pn'rsd: - � t•i^rt:+: 2�.'.�@►02.liu no lr,i -
e•*AiNWt7'. T;.Afa�J dr [M�oev� Test Or;anium: PHoephzies psomeias
a>Mal)tjrigNii(ta: YtXM CardNie(YIVFfIon of WA!/Y P,e•gnunr 4,psrgee
WNl1 SCkrKM SKtb><+/AQvrtiC 70n'lO!G�•&sne*t �'•�c-.x:ti+Are
1622 kw Service Center ttegr+tmA 04+7L13 itif
Raisgk w 27699-1621 f+r6 faraic sF 07 2�E60p
Test Start Date. L Ntarcn 07,2023 i
Replicate number
1 Z 3 4
Car" S.rxs r�mperprbctre iJ :� 1v , 'a SWOW M1 97.5
OtSataiern! �unwa.a►tenw• 10 lC la Awv ape wt ORW 0.7'a2
wo.6fiLANIQnu(mel"vr+e� 0.777 0.737 0.753 0.742 +wwprw i 73
1i r"Upent %X CIOK rwmW r of to vac :0 1 C 10 ij
37SsLnapvC NAMOer o W. 10 1O 10 Scrawl ny 1000
v.vVO,,J&-g at(ngAwvae; 0.557 0-741 0 72 , A-Op u;l•'i[t `39
'A OWL.n2 15,rsrnt rv.-.tre-c!er•+s.• i':S 1�; ; 10
6ix >Y�x -iaa Wrvap 1^. _ 10 + 10 swwwi leco
woattti,rPva(rgrarrari 0-625 0GH 0.730 T C.724-1 arQapert(r.tl 92
!ti E+tl�ue-e�st M rwn ber of k nae 10 10 1C 2
10 - 10 10 1 &A'.OW W ]D0.0
i`tiiat.v.r tt':s?,•.k;b:.e•_, 0.7 3 1.7S5 0.69.'- , -0_-- A-rW at kid
7G El�tsefK y rarra rr rI or:x 1 1:
L..�J oq ts:>++.�bre d iuvae O 1.. 10 10 Sw.wet M 200.0
swetdtiaes�r Ou VWvvet 0.7US 0,702 Awrapp a Intl 0.15
%till�tse# Nurnaer of uanae ] in j10- {
1 1u 10 1suouvr'19f1 L...::�J
tbrq•••a--•�.:vim. +J 6v.v47 ,.^.570 4-55" wrxaM Nt µ.W
W atar Qtamy Date
tyyro myt 00)z Orr3 -Ya Dar s Dqe
f-�al ;-u •�.a' 1�-n1 'nRw: r• :•�it:a'. rir:. . •-_ - s h,'- ►e.►. }d FMaf
COOM&W
O ra ISO: !16 70 6.3t 77S aaa 7.la ?W 7-fa 6-!6 7.7.4 RQ7 rsts aae 7fa
DOtma/it 7.a 72 79 71 7.6 ♦1 !a 7.7 ,a ;.3 7.9 La Ls 7a
Temp i-Ct: 161 14 5 ;Is I Z4 a 1 :a 7 1 745 L :12 I a4.a 1 24 E. 1 74.7 1 2x C. I " Le-5
High Concenn Wart
ar+iS fi it 7si 79S 772 ?ot 749 is, 7fi7 a 177 a `iS
DOIm(/il 7S 7A a0 to i♦ 7D 1-4 !a Lt 74 7E 11 /a
Temp ra 2x4 71-. 14.7 1 ;s.a 1 ac 1 :aa 1 u_3 1 24.6 1 :4.1 i 7ni .3Z 2a6
sw"k FA'knWRiOh 7,s+rvle t 'satwpw 2 56-OW 3 rzrera Analyses Survwat 16^_ V
c.okKocri Bear:fHt: S1fi3-2a. Ji-C7-Ii 01,0523 =.v Noenw. Yes Yes
GnD' Hem fir. Vas Yes
Corptnea�uon, 2a711 z491 :a;n hOCc: 521< r9s
atlu�i^KYins/t Oa0011: 61 +Hr 61 59bI L7£f y53'!e sf:4.
Merolla{w*,IIG{t)d ?s ?9 66 9192 CW >52�; >SI!►
<an�Yct+W{71Vmr,os�v+F 2i1 1j7 7N 2s`-3[`O. Arr7t•x• vts.ai• Duciwt'c
tORalNtldtsNtt'ecAre ima.11 t0� sC Zt7 c0 IJ
WrrPee,rWW at IbpiFt('C; IZ zB 32 iurvirai Lst>KtPt
Art'! rt•t cIlhx CeCUWW cf*.cw C4+o.W4e
75} 2.KG R.44e
S An 2a1A tw?
13% 1.40 0.101
26x 2.410 41At::
Overall Analyses: Stu zalq arts
PASS LCEC: ).Sz% g0EC. S296 OV >32%
DWR Report Form At-5

• '
� PO Box 7565
• Asheville, NC 28802
_T Phone: [phone]
Fax- (8281 350-9368
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LCso Date: June 15, 2023
Facility: Earth Environmental Services, Inc. NPCES;r NC 0020800 Pipe#: 001 County: Cherokee
Andrews WWTP
Laboratory Performing Test. Environmental Testing Solution Inc., ertificate#037 comments
Signature of Operator in Responsible Charge(ORQ:
ORC Phone/E-mail: ���SS7-$;3p r+✓�ts1�w4>`er F'oject#: 17944
Signature of Laboratory Supervisor: Sample#: 230606.1-'.23060B-10
e-Mail to: ATForms.ATB,anncdenr.gov
Or Mail Original to: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch Chronic Test Results
1621 Mail Service Center t-Stat/Rank Sum -2.259
Raleigh.NC 27699-1621 1-Tailed Critical 2508
%Reduction: -6.1
North Carolina Ceriodaphnia Chronic Pass/Fail Reproduction Toxicity Test Percent AverageMortality Reproduction
Control Organisms 1 2 3 4 5 b 8 9 10 11 12 Control Ccntrcl
Number of Young Produced 28 127 1 29 28 1 301 23 127 1 301 29 1 28 1 31 1 29 1 0.0 28.8
Adult Survival: (L)ive,(D)ead L L L L L L _ ✓ L L L L Treatment 2 Treatment 2
0.0 30.5
Effluent Percentage 13% Control Cv
Treatment 2 Organisms 1 2 3 4 5 6 7 8 9 10 11 12 4.2 PASS FAIL
Number of Young Produced 29 131 28 1 28 129 130 34 34 31 27 33 32 "°" " ' "''u''
Adult Survival: (L)ive, (D)ead L I L L I L I L I L L L L L L L 100.0
pH(S.U.) 1st Sample 2nd Sample 2nd Sample Test Start Date: June 07, 2023
Control 7.77 7.81 7.90 7.961 7.91 7.84
Treatment 2 17.7417.94 17.861 7.881 Collection(Start)Date:
m V Sample 1 06-05-23 Sample 2 06-07-23
D.O.(nril 1st Sample 2nd Sample 2nd Sample Sample Type/Duration
Control 7.9 7,7 7.7 1 7.9 7.7 7.6 Grab Comp. Duration J
Treatment 2 7.7 7.9 7.8 7.9 7.8 8.0 samp e- X _
Q
Sarnp e 2 X
r r
LCso/Acute Toxicity Test Alkalinity;mg CaCO3/L) 62,62,62
(Mortality expressed as%,combining replicates.) Hardness jmg CaCO3/l.) 86,84,88
Conductivity(µmhos/an) 314.311,310 294 316
Concentration(9b) Total Residual Chlorine(mg/L) <0.10 <0.10
Mortallty(%I Sample remp at Receipt(°C) 2.7 1.1
LC50= Method of Determination
95% Confidence Limits Trimmed Spearman Karber r v a
q C �]
to Probit
Other: Control
hip CorL.
Organism Tested: Duration: pH (S.U.) DO (mg/L)
DWR Report Form AT-1

• PO Box 7565
9:TV Asheville,NC 28802
Phone: [phone]
Fax: [phone]
Effluent Toxicity Report Form-Chronic Fathead Minnow Multi-Concentration Test - Date: June 20,2023
Facility: Earth Environmental Services,Inc. NPDES#: NC 0020800 Piper 001 county: Cherokee
Andrews WWTP
Laboratory performing rest: Environmental Testing Solutions,Inc.,Certificate#037 Comments
Signature of Operator in Responsible Cho (ORC):A �✓
ORC Phone/E-mail; fs 1-Aravro)actA 17932
Signature of laboratory Supervisor: Sampler. 2)o6o5,01.2mo?.20.230w9.12
e-Mail to: ATForms.ATB9Dncdenr.cav Test Organisms: Pp6tmphollesprome/as
Or Mail Original to: North Carolina Division of Water Resources supplier
Water Sciences Section/Aquatic Toxicology Branch In-hoiue culture
1621 Mail Service Center "gin hatch 1 06-05-23 1201
Raleigh,INC 27699-1621 End hatch: 06-06 23 0500
Test Start Date: I June 06,2023 71
Reppate number
1 2 3 4
Control 5urvlving number orlarvee 10 10 1 10 1 10 survival
Organisms 0nglnalnumberoflarvae 10 10 1 10 1 10 Average-irrw 1 0.769
weight/original(mVarvae) 0.878 0.757 1 0.662 1 0.777 Average art/ 1 0.762
survtvtng Irntl
%Effluent ISunirving number of larvae 10 10 1 10 10
325% loriginal number of larvae 10 10 1 10 1 10 Survival(*A]weight/original friVarvae) 0.841 0.753 0.698 0.748 j Average wt(me
%Effluent Isurvtving number of larvae 10 10 10 A
6Sx original number of Larvae 1 10 10 survival f%) 1W.0
weightionginallmg/larvae) 0.768 2 0.682 6 Averagewt(rrW 0.T22
%Effluent Surviving number of larvae 10 10 10 10
13% Original number of larvae 10 10 10 10 survival(31) 300.0
Weight/originalingry
llasel 0.822 0.774 0.849 0.752 Averagervt(irig) 1 0.799
%Effluent iSurviviing nuribw of larvae 9 10 10 10
26% Original number of larva 10 10 1 10 10 Swrwl(%) 97.5
Weight/orginai(mgfiamae) 0.633 0.850 0.752 0,60 Averap art(mg) 0.710
%Effluent 15uneiving number of larvae 10 9 10 �705�8]
52% onginal number of larvae 10 10 10 Survival(36) 97.5
Weightlongnai irivjUrvael 0.712 0.735 0. Average wt(mm) 1 0.741
Water Quality Data
Osy o owl Day 2 1 _ 0"! 1 Day 4 Days ovy 6
Irrtial Final Initial Final Inrbal Final initial I Final Initial Final Waal Final Ina Final
Control
PM Isu): 774 7.72 7.77 7.54 7.87 7.68 7.90 1 7.70 777 7.57 7.78 7,61 7.81 1 7,40
DO(mg/Li: 7.5 76 7.9 7.2 7.7 7.3 7.7 7.7 7.9 7.2 7-0 7.S 7,7 S.4
m Tep.(-C): 24.8 24.5 248 24.6 24.7 24S 24.7 24.8 24.7 24.6 24.7 24.2 24.6 M.3
High Concentration
PHIsu): 7.69 7.66 7.71 7.S8 7.62 T.6a 7.16 7-70 748 7.52 7.84 ISS 7.93 7,29
DO(migAi: T.6 77 7.8 70 7.4 7.S 8.0 72 7.9 7.1 7S 7-3 7.9 5.2
Temp.(°lac 24.9 24.7 25.0 24.2 24.9 24.6 24.7 24.4 24.8 1 24,5 24.9 24.5 24.7 24.6
Sample htformition sample 1 Sampie 2 Sample 3 Control Analyses survival Growth
Collection start date: 06-04-23 06-06-23 06-09-23 Normal: Yes yes
Grab: Mom.Var Yes yes
Compositeduretion: 23.15-h 24-h 2" NOEC: 52% 52%
Alkaanity(rrcA CacCl* 79 85 92 62.62,61 LOEC. >U% >52%
Hardness(mgJ1 CaCoj: 59 53 53 $4.94.84 ChV: >S2% >S2%
Conductivity(IsmhosiOcm): 1 276 1 239 313 297314 Method: I V!sual Imp. DumetYs
Total residual chkai*jmgA): <0,10 I <0.10 <0.10
Sampk Temp-at Receipt('C): 2.1 2.2 2.2 survival Growth
%Eflluerit Critical Calculated Critical Cekulsted
3.25% 2,410 0.173
6.5% 2 410 0.948
13% 2.410 -0 627
26% 2.410 1202
Overall Analysis: s2% 2.410 0.560
Result: PASS LOEC: >52% NOEC: 52% ChV: >52%
DW R Report Form AT-5

•= �- . ' • � PO Box 7565
• Asheville,NC 28802
•
Phone: [phone]
ET-#
at Fax: [phone]
Effluent Toxicity Report Form-Chronic Fathead Minnow MuIN Conwntratlon Test Date: October 16,2023
aciilty Earth Environmental Services,Inc. NPDES#: INC 0020800 Pipe it: 001 County: Cherokee
Andrews WWTP
Laboratory Performing Test: Environmental Testing Solutions,Inc.,Certificate#037 comments
its
Signature of Operator in Responsible Charge(ORCI:
ORC Phone/E-mail: 971ff- S7- W 4- Pr /A 1 .Ov' Project 8: 19036
Signature of Laboratory Supervisor- sample a: 231002.01,2310Dr.13,23100617
e•Mall to: ATFo(ms.ATB@ncdenr.R Test Organisms: Pimephales promelas
Or Mail Original to: North Carolina Dmsion of Water Resources Supolier
Water Sciences Section/Aquatic Toxicology Branch In-house Culture
1621 Mail Service Center Been hatch' 10 02-23 1400
Raleigh,NC 2 1699-16 2 1 End hatch: 10-03.23 OSW
Test Start Date: October 03,2023
Replicate number
1 2 3 4
Control Survrrrngr�rneroflarvae 1 10 10 10 10 survival(%] 100.0
Organisms Orieinal number oflarvae 10 10 1 10 10 Averagawt(rngl 0.822
weight/originallmg/larvae) 0.729 1 0.791 1 0.869 0.897 Averapwt1 0.822
sunning(mel
•Effluent surviving number of larvae 10 10 10 1
3.15x original number of larvae 10 10 10 10 Survival(%l 100.0
VralgiWoneinal(nWarvae l 0.753 0,828 0.851 0.832 Average wt lrmi 0.816
%Effluent I Survrrng number of larvae 10 11 10
6.5% Original number of larvae 10 1 10 1 10 1 10 survival(%j 100.0
vVeltWorieiral(mg/larvael 0.778 1 0.722 1 0.809 0.815 Average vit(ntg) 0.781
%Effluent survrwg r,�on of larvae 10 1 10 1 10 10
1-- original number of larvae 10 10 10 10 survival(%I 100.0
Weight/original InWlarvael 0.800 C.777 0.779 0.793 Averaea-ir%l 0.787
•Effluent 11wrvwng numbs of larvae 10 9 10 1
-26---1 1 Original number of larvae 10 10 10 10 Survival(%I 97.5
Weight/original(mg/larvael 0.803 0.714 0.709 0.731 Avwaee wt(mel 0.739
•Effluent surviving number of larvae 8 10 10 10
52'K Or,girel number of larvae 10 10 30 10 survival(%{ 95.0
v:elehtlorielnal(rWarvael 0.550 1 0.651 1 0.60CI 0.643
Water Quality Data
Day 0 Ciay 1 clay 2 Day 3 Oay 4 0ay s Day 6
.renal Final initial Feral inmal Firm inmal Final Inroal Final Initial Firal it:n anal
Control
pH{SO: 7.93 7.81 776 7.71 7.93 7.59 7.99 7.72 7.79 7.70 7.91 787 7 39
DO(PWLI: 7.6 71 7.9 7.5 7.8 7.2 79 7.9 7.9 7.3 7.8 75 a-- i 3
Temp.PQ: 24.7 245 24.7 24.5 24.7 24.5 24.8 24.5 24.7 24-3 24.5 24.4 24.7 .43
Migh ContelltraWon
PH{su): 7.81 775 7A6 7.64 7.73 7.45 7.82 7.67 7.75 7.65 7.93 776 7.97 7.36
00(nWL1: 79 77 8.0 75 7.9 58 79 7.7 8.0 7.1 7.9 7.6 7.8 5.7
Ternp.(°C): 1 24.8 241 25.0 24.3 249 24,5 24.9 24.4 25.0 24.4 24.8 24.6 24A 24.6
Simple Information sample 1 sample 2 sa.role 3 Contra Analyses survival Growth
Coheman sun data: 1D-02.23 10-03-23 1D-05-23 Normal; Yes Yes
Grab: Hom,Var Yes yes
Composite duration: 24-h 23.7S-h 24-h NOEL: 52% 26%
Attannity(mg/LCaC0,1: 74 81 97 60.61.61 LOEC: >52% 51%
Hardness{rn8/L CACC J: 44 42 42 ",96,ae CW: 152% 36.8%
Condumvity(lsmho6/cmi- 1 336 1 340 3535 295.316 Method: I Visuallnso. DunneWs
Taal residual chlonne{mgAI: I c 010 I -to 10 c 040
Sample Temp.at Receipt('C): 4.2 1 I.S 1.4 Survival Growth
%Enluent Critical Calculated Critical Calculated
3.25% 2.410 0.133
5.5% 2-110 0.978
\ 13% 2.410 0.327
26% 2.410 1.92c
Overall Analysis: 57% 2.410 4.31C_
Result: PASS LCEC 52% 40EC: 26% ChV: 36.8%
DWR Report Form AT-5

•
• PO Box 7565
• ETS Asheville, NC 28802
Phone: [phone]
Fax: [phone]
October 16, 2023
Ms.Wanda Ladd
Earth Environmental Services, Inc.
75 Bison Lane
Murphy, NC 28906
ETS Project Number: 19036
Test Start Date: October 03, 2023
Facility Tested: Andrews WWTP
Enclosed are toxicity test results for samples received by Environmental Testing Solutions Inc.
Parameter Test Procedure, Method Number Result (ChV)
Code
Fathead minnow, Pimepholes promelas, larval Survival and Growth Chronic
THP6C 36.8%
EPA-821-R-02-013, Method 1000.0
All toxicity testing results required as part of your permit must be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code THP6C.
Additionally, the DMR Reporting Form AT-5 must be signed and e-mailed or mailed to the following
address:
ATForms.ATB(cb-ncdenr gov
North Carolina Division of Water Resources
Water Sciences Section /Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Please call if you have any questions concerning these results.
Sincerely,
1im Sumner
Laboratory Supervisor
North Carolina Certificate Numbers: Biological Analyses: 037,Drinking Water: 37786,Wastewater: 600
14
South Carolina Certificate Number. Clean Water Act: 99053-001

r or C PO Box 7565
Asheville,NC 28802
Phone: [phone]
Fax: [phone]
t....o..www.�m�nq faVuan ii.
Effluent Toxicity Report Form-Chronic Fathead Minnow Multi-Concentration Te5$ Date: October 16,2023
Facility: Earth Environmental Services,Inc. NPDES N: NC 0020800 Pipe Ili: 001 County: Cherokee
Andrews WWTP
Laboratory Performing rest: Environmental Testing Solutions,Inc.,Certificate A 037 Comments
S,"ture of Operates in Responsible Charge(ORt):
ORCPhone/E-mail: 9 - S7- /tr r /a t .dr Pram a: 19036
Signature of Laboratory Supervisor: Sample*: 2310o1-a1.23100f.13,231ao617
e-Mail to: ATForms,[e-mail] Test Orpnismg: Phnepibotes promefos
Or Mail Original to: florin Carolina Division of water Resources supplier
Witter Sciences Section/Aquatic Toodcology Branch In-houu Culture
1621 Mill Service Center Mon hatch: 10-02-23 1400
Raleigh NC 27699 1621 End hatch: 10-03-23 05W
Test Start Date: October 03,2023
Replicate number
1 2 3 4
Control surviving number of larvae 10 10 1 10 10 Survival C%) 100.0
Orpnisms joritinal numberorlanrae 10 10 1 10 10 Average Wit(Rig) 0$22
welght/original(nWrrvael 1 0.729 1 0.791 1 0.869 0.897 Averap wit/ 0.922
surM.ng(mg)
•Effluent surviving number of larvae 10 10 1 10
325% orginal number of larvae 10 10 10 1 Survival(%) 100.0
weight/ongmnal(rroarvwl 0.753 0.828 Average wt 0.832 Avera wt(rrlg) 0.316
%Effluent I Surviving number of larvae 10 10 10 10
6S% orginal number of larvae 10 10 10 10 Survival N) 100.0
wei0t/ormginal(rWarvael 1 0.778 1 0.722 1 0.809 1 Average wt(mg) 0.781
%Effluent sun+wmg number of larvae 1 10 1 10 1 10 10
original number of larvae 10 1 10 1 10 1 10 Survival C%) 100.0
weipmt/original(nWiarvael 0.800 1 0.777 1 0.779 0.793 Average wt(mg) 0.787
%Effluent Survwng number of larvae 10 9 10 1
T6% 10irlinvolnumberaflarvat 1 10 10 1 10 1 10 Survival(%) 97.5
weight/oiginal(mg/larvael 1 0.803 1 0.714 1 0.709 1 0.731 Average wt(mg) 0.739
%Effluent Surrehi number of larvae 1 10 10
S3% original number of larvae 1 10 1 10 10 10 1 Survival I%) 95.0
wabght/onglnal(ma/larvael 1 0.550 1 0.651 1 0.600 0.772 1 Averagewt(mg) 1 0.643
Water Quality Data
Day o oaq 1 Day 2 Day 3 Day 4 Days wy 6
initial Final Irrtial final Initial Anal initial Final Initial final lnitiai Final Initial Finsl
Control
PH(Su): 1 7.33 7.81 776 7.72 7.83 7.59 7.89 7.72 7.79 7.70 7.92 7.37 7.91 7.39
DO(mg/Ll: 1 76 7.7 75 7.5 7.8 7.2 7.9 7.9 7.9 7.3 7.8 7.5 8.0 1 6-3
Temp.rC)-. 1 24.7 24.5 24.7 245 247 24.5 248 24.5 24.7 24.3 24.5 24.4 24.7 124.3
High Conantratkin
PH I5u►: 1 7.81 7.75 786 7.64 7.73 7.45 7.82 7.67 7.75 7.65 7.93 7.76 7.97 7.36
DO(nWLI: 1 79 77 8A 75 7.9 58 79 77 8.0 7.1 7.9 7.6 7.8 1 5.7
Term.)°C): 1 24.6 24.5 2S.0 24.3 249 245 24.9 24.4 25 0 24.4 24.8 24.6 24.6 24.4
Sample information Sample 1 Sample 2 sample 3 Control Analym Survh* Growth
Ccliection start daft: 10-0143 1D-03-23 10435.23 Normal: Yes Yes
Grab: Nam.var. Yes Yes
Composite duration: 2" 23.7" 24-h NOEC 52% 26%
Alkalinity(mgA QCOJ: 74 81 82 60,61,61 LoEC >52% 52%
Hardness(n%k CaCoj: 44 42 42 86,86,88 chv: 42% 36.8%
Conductivity(ymhoslanl: 1 336 1 340 1 355 295-316 Method: I visualkssp. Dunnett's
Total residual chimeImilAl: <0.10 <0.10 <0.1D
Sample Temp.at Receipt rC): 4.2 1s 2_4 sunawl Growth
%Efnuent Critical Calculated Critical CalcnlaUd
3.25% 2.410 0.133
6.5% 2.410 0978
13% 2.410 0927
26% 2.410 1986
Overall Analysis: s2% 2.410 4.3D5
Result: PASS LOEC: 52% NOEC: 26% ChV: 36.9%
DWR Report Form AT-S