NC0024911_Draft Permit_20180529

ROY COOPER
Governor
INO
MICHAEL S. REGAN
Secretary
Water Resources LINDA CULPEPPER
ENVIRONMENTAL QUALITY Interim Director
May 29, 2018
Mr. Thomas E. Hartye
General Manager
Metropolitan Sewerage District of Buncombe County
2028 Riverside Dr.
Asheville,North Carolina 28804
Subject: Draft NPDES Permit Renewal
Permit NC0024911
Broad River WRF
Buncombe County
Facility Class IV
SIC Code 4952
Dear Mr. Hartye:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit,including the following:
• The NC 2007-2014 Water Quality Standard(WQS)Triennial Review was approved by
the NC Environmental Management Committee(EMC) on November 13, 2014. The US
EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions.
The NC Division of Water Resources NPDES Permitting Unit is required to implement
the new dissolved metal standards in all permits public noticed after April 6, 2016. The
new standards for most metals include acute standards. Further, the freshwater standards
for several metals are expressed as the dissolved form of the metals, and seven metals
have hardness-dependent equations. As a result, the NPDES Permitting Unit will need
site-specific effluent hardness data and instream hardness data, upstream of the discharge,
for each facility monitoring these metals in order to calculate permit limitations. Effluent
hardness and instream hardness sampling,upstream of the discharge,has been added to
this permit at a monitoring frequency of quarterly. See Section A. (1) Effluent
Limitations and Monitoring Requirements.
• The Division's ammonia policy was modified in 2016 since EPA no longer supports a
toxicity test instead of ammonia limits. Based on EPA's guidance"Aquatic Life Ambient
Water Quality Criteria for Ammonia—Freshwater 2013", limitations for ammonia will
be implemented in the permit renewal [See Section A. (1)]. These limits will become
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919 807 6300 •

Page 12
effective 12 years from the permit effective date, and a 12-year compliance schedule for
ammonia has been added to the permit [See Special Condition A. (8)].
• Upstream and downstream monitoring for Fecal Coliform has been removed from the
permit since the receiving stream is not impaired for Fecal Coliform [See Section A. (1)].
• Based on the Reasonable Potential Analysis, quarterly monitoring for Cyanide, Total
Copper, and Total Zinc have been removed from the permit [See Section A. (1)].
• All effluent samples reported for silver were less than detection,at a detection level of less
than 5.0 µg/L. In accordance with 15A NCAC 2B .0500 all test procedures must produce
detection and reporting levels that are below the permit discharge requirements and all data
generated must be reported to the approved detection level or lower reporting level of the
procedure. Currently, DWR's laboratory identifies the Practical Quantitation Limit(PQL)
for silver at< 1 µg/L. The allowable discharge concentration for your facility is 0.51 µg/L.
Therefore, future sampling for silver as part of the facility's Pretreatment Program and
Effluent Pollutant Scans should analyze these parameters down to the lower reporting level
of the procedure or PQLs as listed above. No limits or additional monitoring requirements
for silver were added to the permit at this time [See Section A. (1)].
• Some of the wording has changed in Special Condition A. (2). Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• Special Condition A. (3)has been modified to include the specific three years in which the
Effluent Pollutant Scans shall be performed(2019,2020, and 2021). In addition, at the end
of the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• Effluent mercury data was reviewed from February 2012 to August 2016. The Permittee
started testing effluent mercury using EPA test Method 1631E in 2012. In accordance with
the 2012 Mercury TMDL NPDES Guidance the permittee needs to show annual mean
effluent concentrations below the Water Quality Based Effluent Limitation (WQBEL) of
102.2 ng/L and no exceedance of the Technology Based Effluent Limitation(TBEL)of 47
ng/L. A review of the data showed that the annual averages were below the WQBEL and
all data below the TBEL, therefore, no mercury limitation is required.
All twenty-three low level effluent mercury samples collected since February 2012 were
over 1 ng/L.As a result,a Mercury Minimization Plan(MMP)requirement has been added
to this permit renewal. See Special Condition A. (5). Please note that the Permittee shall
develop and implement a MMP during this permit term. The MMP shall be developed
within 180 days of the NPDES Permit Effective Date, and shall be available for inspection
on-site. A sample MMP was developed through a stakeholder review process and has been
placed on the Division website for guidance (https://deq.nc.gov/about/divisions/water-
resources/water-resources-permits/wastewater-branch/npdes-wastewater-permits, under
NC Model Mercury Minimisation Plan).

Page 13
• Special Condition A. (6) Groundwater Requirements has been revised. Detailed
groundwater monitoring requirements and sampling plan have been included in the
attachment to the permit(See Attachment 1).The Permittee shall work directly with DWR
Ashville Regional Office on the sampling plan. If any change is made to the sampling plan,
the Permittee shall submit the approved plan to the Davison's NPDES Complex Permitting
Section.
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs)and program reports. The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR)
interne application has been updated in the permit. [See Special Condition A. (9)]
• Regulatory citations have been added to the permit.
The NPDES Standard Conditions(Parts II, III, and IV) are not included with this draft. They can
be found at the following link if you would like to review them in conjunction with this draft
permit.
http://portal.ncdenr.org/c/document_library/get file?uuid=b32f8a66-541 c-4cf5-8ba6-
03e381 edb2da&groupld=38364
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Buncombe County area, soliciting public comments on this draft
permit. Please provide any written comments you may have to the following: NCDEQ/DWR,
NPDES Permitting Branch, 1617 Mail Service Center, Raleigh,NC 27699-1617 no later than 30
days after receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit,please call me at(919) 807-6389 or by email at [e-mail].
Sincerely,
Bing Bai, Engineer
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Susan Meadows
DWR/Ashville Regional Office/Water Quality
DWR/Operator Certification Program/Maureen Kinney

Permit NC0024911
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
• NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission,and the
Federal Water Pollution Control Act,as amended,
Metropolitan Sewerage District of Buncombe County
is hereby authorized to discharge wastewater from a facility located at the
French Broad River WRF
2225 Riverside Drive
Woodfin, North Carolina
Buncombe County
to receiving waters designated as the French Broad River in the French Broad River Basin in accordance with
effluent limitations,monitoring requirements,and other conditions set forth in Parts I,II, III and IV hereof.
This permit shall become effective xxxx.
This permit and authorization to discharge shall expire at midnight on December 31, 2022.
Signed this day xxxx.
Draft
Linda Culpepper,Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0024911
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked,and as
of this issuance,any previously issued permit bearing this number is no longer effective.Therefore,the exclusive
authority to operate and discharge from this facility arises under the permit conditions,requirements,terms, and
provisions included herein.
Metropolitan Sewerage District of Buncombe County is hereby authorized to:
1. Continue to operate an existing 40 MGD wastewater treatment facility consisting of the following
components:
• Two multi-rake mechanical bar screens
• Two vortex grit basins
• Three influent pumps with capacity of 35 MGD each
• Instrumental flow measurement
• Three perforated-plate mechanical fine screens
• 1st,2nd,and 3rd stage RBCs(152 total)
• Three intermediate pumps
• Four intermediate clarifier cells(total volume 2 MG)
• Effluent chlorination(liquid sodium hypochlorite)
• Effluent de-chlorination(liquid sodium bi-sulfate))
• Two gravity sludge thickeners-100 ft diameter each
• Tow 2.1 MG surge tanks
•
Three surge pumps with capacity of 5 MGD each
• Two 2.5-meter belt filter presses(gravity and pressure sections)
• Fluidized bed incinerator(40 DT/day rated)
• One 2 MW back-up generator(diesel)
• Two 1 MW back-up generators(diesel)
• 192 cloth-media filter disks(10 micron)
• Two 450 KW gas generators
• Three 850 KW hydro turbines(French Broad River source)
• 17-acre ash storage lagoon
• SCADA—PC/PLC Control System—full automated control of WRF
The facility is located at the MSD Buncombe County WRF on 2225 Riverside Drive in Woodfin, Buncombe
County;
2. Discharge from said treatment works via Outfall 001,at the location specified on the attached map into the
French Broad River, currently classified as B water in subbasin 04-03-02 [HOC: 06010105] of the French
Broad River Basin.
Page 2 of 12

Permit NC0024911
Part I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Beginning on the effective date of this permit and lasting until expiration,the Permittee is authorized to
discharge treated wastewater through Outfall 001. Such discharges shall be limited and monitored' by the
Permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Parameter Code Monthly Weekly Daily Measurement Sample Sample Location 2
Average Average Maximum Frequency Type
Flow 50050 40 MGD Continuous Recording Influent or Effluent
CBOD,5-day,20°C 3 80082 25.0 mg/L 40.0 mg/L Daily Composite Influent and Effluent
Total Suspended Solids 3 C0530 30.0 mg/L 45.0 mg/L Daily Composite Influent and Effluent
NH3 as N(mg/L) C0610 Daily Composite Effluent
NH3 as N
C0610 14.0 mg/L 35.0 mg/L Daily Composite Effluent
(April 1—October 31)4
NH3 as N
C0610 31.7 mg/L 35.0 mg/L Daily Composite Effluent
(November 1 —March 31)4
Dissolved Oxygen 00300 Daily Average not less than 5.0 mg/L Daily Grab Effluent
Total Residual Chlorine 5 50060 28 lig/ Daily Grab Effluent
Fecal Coliform
31616 200/100m1 400/100m1 Daily Grab Effluent
(geometric mean)
Temperature(°C) 00010 Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Total Nitrogen(mg/L)6 C0600 Quarterly Composite Effluent
Total Phosphorus(mg/L) C0665 Quarterly Composite Effluent
Conductivity(µmhos/cm) 00094 Daily Grab Effluent
Hardness-Total as[CaCO3 00900 Quarterly Composite Effluent
or(Ca+Mg)](mg/L)
Chronic Toxicity 7 TGP3B Quarterly Composite Effluent
Temperature(°C) 00010 Daily Grab U&D
Conductivity(µmhos/cm) 00094 Daily Grab U&D
Dissolved Oxygen(mg/L) 00300 Variable 2 Grab U&D
Hardness-Total as[C BCOs 00900 Quarterly Grab U
or(Ca+Mg)](mg/L)
Effluent Pollutant Scan NC01 Monitor and Report 3 per cycle See A.(3) Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see A. (9)].
2. U=Upstream at dam discharge to fish ladder adjacent to intake flume to the hydroelectric plant(Location is
approximately 2700 feet upstream of the hydroelectric plant). D = Downstream at Ledges Park. Upstream
and downstream samples shall be grab samples collected three times per week during June,July,August and
September then once per week in the remaining months of the year.
Page 3 of 12

Permit NC0024911
3. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. The limits for ammonia shall become effective 12 years from permit effective date.This compliance schedule
is provided to allow the facility to budget,design,and build the treatment system to comply with the new
ammonia limit [See A. (8)].
5. Total residual chlorine shall be monitored only if chlorine is added to the treatment process.The Division shall
consider all effluent TRC values reported below 50 gg/L to be in compliance with the permit.However,the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory.
6. TN= TKN+NO3-N+ NO2-N where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N+
NO2-N are Nitrate and Nitrite Nitrogen,respectively.
7. Whole effluent toxicity will be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia at 12%.
Samples shall be taken in February,May,August&November[see A. (2)].
8. The permittee shall sample instream hardness upstream of the facility's discharge.The sample shall be
representative of the hardness in the receiving stream. If the permittee is a member of a monitoring coalition
program, sampling for instream hardness may be waived as long as the monitoring coalition agrees to sample
hardness at the nearest upstream location,at a minimum frequency of quarterly,and the permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge. The permittee is responsible for submitting instream
hardness test results with its permit renewal application package. If Coalition membership is cancelled or the
Coalition terminates instream hardness sampling at the approved station, the permittee will immediately notify
the Division and resume sampling for instream hardness upstream of its discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 12

Permit NC0024911
A. (2) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 028.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 12%.
The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010,or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December 2010)or
subsequent versions.The tests will be performed during the months of February,May,August and November.
These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent
sampling for this testing must be obtained during representative effluent discharge and shall be performed at the
NPDES permitted fmal effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit,then multiple-concentration testing shall be performed at a minimum,in each of the two
following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010)or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form(MR-1)for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original)is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after
the end of the reporting period for which the report is made.
Test data shall be complete,accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the
permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the
facility name,permit number,pipe number, county, and the month/year of the report with the notation of"No
Flow"in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address
cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month.Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three month time interval that begins on the first day of the month in which toxicity testing is required
by this permit and continues until the fmal day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls, shall constitute an
Page 5 of 12

Permit NC0024911
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
A. (3) EFFLUENT POLLUTANT SCAN
[G.S. 143-215.1(b)]
The Permittee shall perform a total of three(3)Effluent Pollutant Scans for all parameters listed below. One scan must
be performed in each of the following years: 2019,2020,and 2021. Analytical methods shall be in accordance with
40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in concentrations greater
than applicable standards and criteria. Samples should be collected with one quarterly toxicity test each year,and must
represent seasonal variation [i.e., do not sample in the same quarter every year]. Unless otherwise indicated, metals
shall be analyzed as"total recoverable."
Ammonia(as N) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether
Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether
Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis(2-chloroethoxy)methane
Page 6 of 12

Permit NC0024911
Reporting. Test results shall be reported on DWR Form-A MR-PPA1 (or in a form approved by the Director)by
December 31St of each designated sampling year. The report shall be submitted to the following address: NC DEQ
/DWR/Central Files, 1617 Mail Service Center,Raleigh,North Carolina 27699-1617.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal facilities
that are subject to the Effluent Pollutant Scan requirements listed above are also subject to additional toxicity
testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5). The US EPA requires four(4)toxicity
tests for a test organism other than the test species currently required in this permit. The multiple species tests
should be conducted either quarterly for a 12-month period prior to submittal of the permit renewal application,or
four tests performed at least annually in the four and one half year period prior to the application. These tests shall
be performed for acute or chronic toxicity,whichever is specified in this permit. The multiple species toxicity test
results shall be filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional
toxicity tests and reporting requirements. Results should also be summarized in Part E(Toxicity Testing Data)of
EPA Municipal Application Form 2A,when submitting the permit renewal application to the NPDES Permitting
Unit.
A. (4) PRETREATMENT MONITORING
Ground Water remediation sites discharging to MSD Buncombe WRF with locally issued permits shall be
considered as Non-Significant Industrial Users and shall have no specific requirements for parameter limits or
monitoring frequency if they do not discharge more than 25,000 gallons of industrial process wastewater per day,
they do not discharge more than 5 %of the Maximum Allowable Headworks Loading(MAHL)of any pollutant to
the MSD Buncombe WRF,they are not a 40 CFR regulated Categorical Industry,or they do not in the opinion of
the Director of MSD Buncombe have the potential to upset or interfere with the operation of the WRF. The
Director of MSD WRF shall enforce the Sewer Use Ordinance,permit,limit,monitor,and inspect all dischargers to
his WRF as needed to assure proper operation and compliance with all NPDES effluent limits including Whole
Effluent Toxicity.
A. (5) MERCURY MINIMIZATION PLAN
[G.S. 143-215.1(b)]
The permittee shall develop and implement a mercury minimization plan during this permit term. The MMP
shall be developed within 180 days of the NPDES Permit Effective Date,and shall be available for inspection
on-site. A sample MMP was developed through a stakeholder review process and has been placed on the
Division website for guidance(http://portal.ncdenr.org/web/wq/swp/ps/npdes,under Model Mercury
Minimization Plan). The MMP should place emphasis on identification of mercury contributors and goals for
reduction. Results shall be summarized and submitted with the next permit renewal. Performance of the
Mercury Minimization Plan will meet the requirements of the TMDL(Total Maximum Daily Load)for mercury
approved by USEPA on October 12,2012,unless and until a Waste Load Allocation specific to this facility is
developed and this NPDES permit is amended to require further actions to address the Waste Load Allocation.
Page 7 of 12

Permit NC0024911
A. (6) GROUNDWATER REQUIREMENTS
[15A NCAC 2L .0200]
The permittee shall conduct groundwater monitoring to determine compliance with the current groundwater
Standards found under 15A NCAC 2L .0200.The monitoring shall be conducted in accordance with the Sampling
Plan approved by the Division(See Attachment 1).If any change is made to the Sampling Plan,the permittee shall
submit the modified plan to DWR Ashville Regional Office for approval,and submit the approved Sampling Plan
to the Division at following address:
NCDEQ/Water Quality
NPDES Permitting
1617 Mail Service Center
Raleigh,NC 27699-1617
A. (7) ASH STORAGE LAGOON
MSD Buncombe is permitted to operate a 17-acre lagoon for the purpose of storing incinerator ash. Effluent from
this lagoon is sent to the head of the plant for treatment. No other materials may be stored in the lagoon without
prior Division notification and approval.
A. (8) AMMONIA SCHEDULE OF COMPLIANCE
[G.S. 143-215.1(b)]
In accordance with Federal Regulations 40 CFR 122.47 the permit shall specify interim dates for the submission of
reports of progress toward completion of the interim requirements and indicate a projected completion date. The
Permittee shall submit the following interim reports until the new ammonia-nitrogen limitations specified in
Section A. (1)Effluent Limitations and Monitoring Requirements become effective by twelve(12)years from
effective date of permit.
1. By December 31, 2019,the Permittee shall submit a Wastewater Treatment Optimization and Improvement
Plan to define the steps to be taken to achieve the ammonia limits.The Permittee shall also commence
construction of the High Rate Primary Treatment improvement system;
2. By December 31,2020,the Permittee shall submit a progress report summarizing the Headworks
performance testing, and the status of the optimization and improvements plan.Testing to include NH3-N,
Total N,Total BOD,and Soluble BOD at influent and effluent locations;
3. By December 31,2021,the Permittee shall complete the installation of the High Rate Primary Treatment
system,and initiate performance testing.Testing to include NH3-N,Total N,Total BOD,and Soluble BOD
at influent and effluent locations.The Permittee shall submit a progress report confirming installation and
the status of the optimization and imptjovements plan;
4. By December 31,2022,the Permittee shall continue High Rate Primary Treatment performance testing and
begin the Biological Treatment consultant selection.Testing to include NH3-N,Total N,Total BOD, and
Soluble BOD at influent and effluent*cations.The Permittee shall submit a progress report on
performance testing results and the status of the optimization and improvements plan;
5. By December 31,2023,the Permittee shall complete High Rate Primary Treatment system performance
testing,and begin Biological Treatment Alternatives Evaluation.The Permittee shall submit final results on
the performance testing,and the status of the optimization and improvements plan.Testing to include NH3-
N,Total N,Total BOD,and Soluble BOD at influent and effluent locations;
Page 8 of 12

Permit NC0024911
6. By December 31,2024,the Permittee shall submit a completed Biological Treatment Alternative
Evaluation report including the chosen alternative along with a design and construction timeline and
specific steps to be taken to achieve the ammonia-nitrogen limits;
7. By December 31,2025,the Permittee shall submit an annual report identifying the steps that have been
taken and the progress towards completing the Biological Treatment design;
8. By December 31,2026,the Permittee shall complete Biological Treatment design and submit an
application for Authorization to Construct for the Biological Treatment system;
9. By December 31,2027 and 2028,the Permittee shall submit annual progress reports summarizing the status
of the construction of the Biological Treatment system;
10. By December 31,2029,the Permittee shall complete the Biological Treatment system construction and
submit a progress report summarizing any Biological Treatment performance testing. Testing to include
NH3-N,Total N,Total BOD,and Soluble BOD at influent and effluent locations.
11. By twelve(12)years from effective date of the permit,the Permittee shall achieve compliance with the
ammonia limits in Section A. (1).
All reports shall be submitted to each of the following Division of Water Resources addresses:
(1) NCDEQ/Water Quality (2)NCDEQ/Water Quality
NPDES Permitting Asheville Regional Office
1617 Mail Service Center 2090 US 70 Highway
Raleigh,NC 27699-1617 Swannanoa,NC 28778-8211
Any modifications to the schedule shall be requested to the Division at least ninety(90)days before the deadline.
Modifications to the schedule in excess of four months will be subject to public notice.
A. (9) ELECTRONIC REPORTING OF MONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports.
The fmal NPDES Electronic Reporting Rule was adopted and became effective on December 21,2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B.(11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements (Supersedes Section D. (2.) and Section E. (5.) (a)I
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report(eDMR)intemet application.
Page 9 of 12

Permit NC0024911
Monitoring results obtained during the previous month(s)shall be summarized for each month and submitted
electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit
DMRs electronically using the intemet. Until such time that the state's eDMR application is compliant with
EPA's Cross-Media Electronic Reporting Regulation(CROMERR),permittees will be required to submit all
discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR
submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR
to the following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access,then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring
data may be submitted on paper DMR forms(MR 1, 1.1, 2, 3)or alternative forms approved by the Director.
Duplicate signed copies shall be submitted to the mailing address above. See"How to Request a Waiver from
Electronic Reporting"section below.
Regardless of the submission method,the first DMR is due on the last day of the month following the issuance
of the permit or in the case of a new facility, on the last day of the month following the commencement of
discharge.
Starting on December 21,2020,the permittee must electronically report the following compliance monitoring
data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act(CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division(see"How to Request a Waiver from
Electronic Reporting"section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the permittee must identify the initial recipient at the time of each
electronic submission. The permittee shduld use the EPA's website resources to identify the initial recipient for
the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity(EPA or
the state authorized by EPA to implement the NPDES program)that is the designated entity for receiving
electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of
electronic submission and for each state. Instructions on how to access and use the appropriate electronic
reporting tool will be available as well. Iiformation on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electronic-reporting-rule.
Page 10 of 12

Permit NC0024911
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division. Requests
for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at
least sixty(60)days prior to the date the facility would be required under this permit to begin submitting
monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon
expire. At such time,monitoring data and reports shall be submitted electronically to the Division unless the
permittee re-applies for and is granted a new temporary electronic reporting waiver by the Division. Approved
electronic reporting waivers are not transferrable. Only permittees with an approved reporting waiver request
may submit monitoring data and reports on paper to the Division for the period that the approved reporting
waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B.
(11.)(a)or by a duly authorized representative of that person as described in Part II, Section B.(11.)(b). A
person, and not a position,must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions,the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR and obtaining an eDMR user account,please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
"I cert, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period
may be extended by request of the Director at any time [40 CFR 122.41].
Page 11of12

Permit NC0024911
!!=,Car' i t. , .`a , l / }1
M�\.< ��• l// `..ria � ,s ,�.. ';' - " 1 ,`,., .Ar)? ,'
• i, -.----.. _ � •- �iy.r •CB;... PiF +���lyyfl{�� •�v f. r•���''.
`�� f� `/% v ., ♦ •!•ma k•,P,r r ?4,....\--',1‘
� \� :./ t•-, ,4 :t 11.0 t44t�ji•� ` Sy :its: �s)' J \ ��LV„ . ti:r� ,fifty;,„:� ,�
��� /' — I___----.1-7 :::--:
— .\y, y'"Tif tib••
,_,„,,, \
,/ �`` til vt' r Ire (� . r./ r� :. .,,•(any !V �, ��
(„-„,,
„ , ,........„
vr:eS ' ---:, ii(1 k c--, '\ 1(0 i c 1 ,,1- AAglay.-Ti 1 \,' --- \\
J
,1 y,,,,t._
/./..„,..\
4 Discharge Point \‘,..\,,i,,,,,, ,
--,.. \.,,, ,,._..,, ,.., ,i;..), , , ,v ,,,, ; ,.._ ,,L,., . . .,_,L .,. , :, ,„, ,, (... ..-, ,. ,
, .b...,N ‘(, < \.\. --/4 )\ '1‘ (\.., „. (,0, , , A.,..,....s.t... _ ,, ---r -,, c ,,, ) k
\fr.
/ '''''' ,. 7 „,„ , 7 , .,
, ,,. .,-,. .1„---_,z„: ,...,/_- ,. . ,v,c.,,_ ,_ , ., „N) ,---,
, . .....:„., ,
_ ____,
, ) _ ,,, •,• \\,, „,...,• ,..,„.. , ,,,,.... ... , , _ ., ..... . , , ,, __.
--”' ' ' li \l''' '-- r-- - I I "-- --"-- \ IP( ''''- \ \
1 fp i „r ,A\ 40' \ _."----Cbrii -‘,24 . \-....!.,..,,,-\-----f” '''' j ' ',z' /: ,'' 're'-- e" , 1,_,/,' illIll '
, lel ' s"...., /,1 (
\ Ci: --- --. .. /---\f''l r'\\ ';,- 1, : iiit7i-'-' ".i.7•--v11--X \'N.L-2-'44
,/t)::, ,_ loop , ,
ke, V ---\ - ).7N, s --- -_;--- -, _!—=-4, -0,17-0,2,,-17., -4 ,r,
4+
-- ' --7 '(:!_._, \. , 1 ,. .-. ,. - ,,Ci" -;* , ' /D '1 ',-- ,- .. '• .,' i _/ . , \J 3' \,\ ---11
\....... !i. ' j p n r-- c j,,,, l/ \; _\-- i„„.. ;,,,,, :.. ,„ . % , , _...,
:-/".-"--- i- ' (/,\y-- P-\;'-', ,..---;) 4.(,-,WI :. \ ' . t\,;tTr '?/-)2 w/re - .
,. 1�,.�i ' !Ne i' ' 1,i„.•110/ -,�a ,,,�C y ����, `'-)4 i J ,i. %
r� 1 , r
bp1) 41,>_,,.\ii\-2,,,A,40-. 1.,
*I. .) ; i 1 r,\,.!,,\,(,-.\ ,,. .':-..1. i. ,,, , 1 1 ..,*,'
1/ -crf (. • - 4k VA •
1‘... ' ,--,_ ,y,...,, "\--../ I .. ..„,... .‘ N , 1 \ , N.
`‘,4,,,,)/7.1.." ,.•.: .. i' sv' ' ( r\ i(rc't\-°.., / .1; ('. ''s\e, .X\ I ril ` !I 0_,4. - --.rc—,7L'.
. •. .„/i .//:_.---.------ %.i -1---, -<,.< 1 I (f\. )! ; 1_____ \ \N, \ 4..„,, '--m 1 f „s i
---;, 41,--- /64 1./ .. hie,,,-1,4 _._ .....:.;-, ,..., i'---,..,„ \ . --,-.-2s.,..)/ / y_ ,r _i -A „\Iii c.., ' ,\c ',;'-..• ,,,,•
rprI
: `~• • '----<:::::?____.---....., ��.' i–) » T• �_i -\t � � ' i
.\ ' / .' '1 k(' ' 42\r>--) \I))`11-'----?‘3 \. sN''Ci I ‘N); \ ')r'\ ,‘-'` ','-i% \* ( ilk? --:- ' ''
-}) CD /() , \ir--- ' •• f) 4/.\•..' im .d.i,:i ro.-- /)1 "
l'-- e/ ".1 A \u------)
7 __ \\. , ,./ `.,try I .i 5• I "i - 11�)J 1/� / i.7` /• J///�,a�/
it
:;- Al i ,--...Vai
._.. ,k, vi., /., 1 _ .,•C7/. ....„1:,__,' 4(...k 1‘.., \--..A'N'\ _,',..___:_,L: 4:;.,:ill:
\/ ff,a11 . ) PligliAb . , iii\Ne.411' 1 ' .\ ' *1) . ' 4 ... Is' .i;,.jf ' - --....._-'''(... '
NC00024911 - MSD Buncombe CountyI Facility x
Latitude: 35°39'02" Sub-Basin: 04-03-02
Longitude: 82°35'54" HUC: 06010105 Location
Quad#: EBNE/Weaverville
Stream Class: B
Metropolitan Sewerage District of Buncombe County
Receiving Stream: French Broad River North NC0024911
Permitted Flow: 40.0 MGD NC0024911
Permitted

Permit NC0024911
Permit Attachment 1: Groundwater Requirements
1. Sampling Requirements:
a. Existing monitoring wells shall be sampled every January,June, and October, and the Permittee
shall submit two original copies of a site map within 180 days from the effective date of the
permit.. Detailed sampling requirements are listed in the attachment to this permit.
Groundwater Well Location Groundwater Characteristics Monitoring Requirements
Monitoring
Wells Latitude Longitude PCS Parameters Frequency Sample
Code Type
00610 Ammonia(as NH3-N) Grab
01002 Arsenic(as As) Grab I
MW-1R 01007 Barium(as Ba) January, Grab
(M87J3) 35.646387 -82.592679 01027 Cadmium(as Cd) June, i
Grab
October
00940 Chloride(as Cl) Grab
01034 Chromium(as Cr) Grab
01045 Iron(as Fe) Grab
MW-2R 01051 Lead(as Pb) January, Grab
(M87J5) 35.645495 -82.597638 01055 Manganese(as Mn) June, Grab
October
71900 Mercury(as Hg) Grab
00600 Nitrate(as NO3-N) Grab
00400 pH ` Grab
00981 Selenium(as Se) January, Grab
MW-3 (M87J4) 35.646441 -82.597179 June,
01077 Silver(as Ag) October Grab
00929 Sodium(as Na) Grab
00945 Sulfate(as SO4) Grab
70300 Solids,Total Dissolved— 180°CJanuary, Grab
00680 Carbon,Total Organic(as TOC) June, Grab
MW-4(M86J6) 35.645449 -82.59868685820 Water Level from Surface z October Calculated
78732 Volatile Compounds,(GC/MS) Annually 3 Grab
Footnotes:
1. The measurement of water levels shall be made prior to purging the wells. The depth to water in
each well shall be measured from the surveyed point on the top of the casing. The measurement of
pH shall be made after purging and prior to sampling for the remaining parameters.
2. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the
relative elevation of the measuring point for each monitoring well. The measuring points (top of
casing)of all monitoring wells shall be surveyed relative to a common datum.
3. Annual sampling for volatile organic compounds shall be conducted in the month of October
exclusively.
b. Volatile organic compounds(VOCs) shall be analyzed for the following methods:
i. Standard Method 6200C (PQL at 0.5 µg/L or less),
ii. Standard Method 6200B (PQL at 0.5 µg/L or less),

Permit NC0024911
iii. EPA Method 8021 (Low Concentration,PQL at 0.5 µg/L or less),
iv. EPA Method 8260(Low Concentration,PQL at 0.5 µg/L or less),or
v. Another method with prior approval by the Water Quality Regional Office Section
Chief.
Any of the referenced methods used for VOCs shall,at a minimum, include all of the constituents
listed in Table 6200: I of Standard Method 6200. Any method shall provide a PQL at 0.5 µg/L or
less,which shall be supported by laboratory proficiency studies required by the Division's
Laboratory Certification Unit.Any constituents detected above the MDL,but below the PQL at
0.5 µg/L, shall be qualified(i.e.,estimated)and reported.
c. Any laboratory selected to analyze parameters shall be Division-certified for those parameters
required.
2. Site Mapping Requirements:
The Permittee shall submit two original copies of a site map 180 days from the effective date of the
permit with a scale no greater than 1-inch equals 100 feet. At a minimum,the map shall include the
following information:
a. The waste boundaries for the for the Ash Storage Lagoon and the major components of the waste
treatment system.
b. The location of all property boundaries.
c. The location and identity of each existing monitoring well,new monitoring wells,and any surface
water monitoring locations associated with the Ash Storage Lagoon and the wastewater treatment
system.
d. Labels for each monitoring well site will include the following:
i. Elevation of the top of the well casing(i.e.,measuring point)relative to a common datum,
ii. Depth of the water below measuring point at the time measuring point is established,and
iii. Well depth from the land surface.
e. One contiguous compliance boundary associated with the Ash Storage Lagoon and the major
components of the waste treatment system. This boundary,based on the origination date of the
permit, is defined as 500 feet from the waste boundary or at the property boundary,whichever is
closer to the source.
f. All NPDES outfalls associated with the Ash Storage Lagoon and the wastewater treatment system.
g. The date the map is prepared and/or revised.
h. The prepared maps shall be submitted to:
Attention: Ne Division of Water Resources
Asheville Regional Office
2090 US 70 Highway
Swannanoa,North Carolina 28778
3. New Monitoring Well Requirements:
a. One year from the effective date of this permit,the permittee shall Install four(4)new monitoring
wells associated with the Ash Storage Lagoon and the wastewater treatment system regulator
boundary as approved by the Asheville Regional Office Division of Water Resources(828)296-

Permit NC0024911
4500.The regional office supervisor shall be notified 48 hours in advance of any new well
construction during normal business hours, 8 AM—5 PM.The new wells shall be constructed:
i. Such that the water level is never above or below the screened(open)portion of the well at any
time,
ii. Meets requirements in 15A NCAC 02C .0108,and
iii. An identification tag is attached to the outside portion of the well cover.
b. Upon completion of the installation of the new monitoring wells,existing monitoring wells,MW 1,
MW2,MW3,MW4 and two earlier background wells shall be abandoned in accordance with 15A
NCAC 02C .0113.
c. Questions concerning the requirements in this special condition should be directed to the regional
office supervisor, Asheville Regional Office(828)296-4500.
4. Low-Flow Sampling Requirements
The permittee is required to implement a low-flow sampling technique to ensure the turbidity
concentrations are less than 10 NTU's at the time groundwater samples are collected. Low-flow
sampling utilizes an adjustable rate pump(e.g. peristaltic pump)with typical flow rates on the order
of 0.03—0.13 gallons per minute(GPM). Water level, field parameters(e.g. temperature,pH,
specific conductivity,dissolved oxygen, &oxidation reduction potential), and turbidity are all
measured simultaneously. A groundwater sample is typically collected after the field parameters and
water level have stabilized and the turbidity concentration is below 10 NTUs.
5. Reporting/Documentation Requirements
a. The results of the sampling and analysis shall be received on the most-recent version of
Groundwater Quality Monitoring: Compliance Report Forms(i.e.GW-59&GW-59a Form)with
copies of the laboratory analyses to the Division on or before the last working day of the month
following the sampling month.
b. All reports,maps,and other documents required in the"Groundwater Requirements"section of
this permit,unless otherwise directed,shall be mailed to the following address:
Attention: NCDEQ—DWR
Information Processing Unit
1617 Mail Service Center
Raleigh,NC 27699-1617
c. Updated blank forms may be downloaded from the website below or requested from the address
listed above.
https://deq.nc.gov/about/divisions/water-resources/water-resources-permits/wastewater-
branch/non-discharge-permitting-unit/reporting-forms
6. Applicable Boundary Requirements
The Compliance boundary is specified by regulations in 15A NCAC 02L.0107(a).For disposal systems
individually permitted prior to December 30, 1983,the compliance boundary is established at a horizontal
distance of 500 feet from the waste boundary or at the property boundary,whichever is closer to the

Permit NC0024911
source. An exceedance of Groundwater Quality Standards at or beyond the Compliance Boundary is
subject to corrective action according to 15A NCAC 2L .0106 (c).
7. Additional Requirements
Any additional groundwater quality monitoring,as deemed necessary by the Division, shall be provided.