NC0040266_Draft Permit_20230418

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Mr. Harvey Murphrey
Knightdale Estates MHP LP
808 Eagle Rock Rd
Wendell, NC 27591
Dear Permittee:
SAIT
NORTH CAROLINA
Environmental Quality
April 19, 2023
Subject: Draft NPDES Permit NCO040266
Knightdale Estates MHP WWTP
Grade WW-2 Biological WPCS
Wake County
The Division has reviewed your request to renew the subject permit. Enclosed with this letter is a copy of the draft
permit for your facility. Please review this draft carefully to ensure your thorough understanding of the
information, conditions, and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
➢ A reopener condition for permits in the Neuse River basin has been added at Part I. A. (5).
➢ Electronic data submission requirements have been updated.
The NPDES standard conditions (Parts II, III, and IV) that are a part of the permit are not included in this draft
document (cover, map, and Part I). The conditions are the same as in your current permit except that agency and
division names have been updated. The latest version is available at hops://bit.ly/3k5NFaL and can be viewed
online or downloaded as a PDF file.
With this notification, the Division will solicit public comment on this draft permit by publishing a notice in
newspapers having circulation in the general Wake County area, per EPA requirements. Please provide your
comments, if any, to me at the e-mail address below no later than 30 days after receiving 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 the draft, please contact me at charles.weaverkncdenr.. og_v.
Sincerely,
Environmental Specialist II
NPDES Compliance and Expedited Permitting
D � ��� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NOHIH CAHOLINh 919.707.9000
O.""M of Em1;; al Owl

Permit NCO040266
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision 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,
Knightdale Estates MHP Limited Partnership
is hereby authorized to discharge wastewater from a facility located at the
Knightdale Estates MHP WWTP
Lodge Drive (NCSR 2516)
Knightdale
Wake County
to receiving waters designated as an unnamed tributary to the Neuse River in subbasin 03-04-02 of the Neuse
River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, IIl, and IV hereof.
This permit shall become effective.
This permit and authorization to discharge shall expire at midnight on March 31, 2028.
If the permittee intends to continue to discharge at the facility beyond the term of this permit, a renewal
application must be submitted no later than October 3, 2027 (180 days before the expiration of this
permit).
Signed this day
Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

Permit NCO040266
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit
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.
Knightdale Estates MHP Limited Partnership
is hereby authorized to:
1. Continue to operate an existing 0.025 MGD wastewater treatment facility that includes the following
components:
■ Manual bar screen
■ Aeration basin
■ Secondary clarifier
■ Aerobic digester [2500 gallons]
■ Dual sludge storage tanks [1200 gallons each]
■ Tablet chlorine disinfection
■ Chlorine contact chamber with air diffuser
■ Tablet dechlorination
■ Post aeration
■ Effluent flow meter [ISCO 3230]
This facility is located at the Knightdale Estates MHP WWTP off Lodge Drive near Knightdale in Wake
County.
2. Discharge from said treatment works via outfall 001 into an unnamed tributary to the Neuse River, currently
classified C-NSW waters in sub -basin 03-04-02, hydrologic unit 030202010705 of the Neuse River Basin, at
the location specified on the attached map.
Page 2 of 8

Permit NCO040266
Part I
Grade WW-2 Water Pollution Control System [15A NCAC 08G.0302]
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored'
by the Permittee as specified below:
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Daily
Measurement
Sample
Sample
[PCS CODE]
Average
Maximum
Frequency
Type
Location2
Flow [50050]
0.025 MGD
Continuous
Recording
Effluent
Total Monthly Flow (MG) [82220]
Monitor and Report
Monthly
Recorded or
Calculated
Effluent
BOD, 5-day, 200C [00310]
27.0 mg/L
40.5 mg/L
Weekly
Grab
Effluent
(April 1- October 31)
BOD, 5-day, 200C [00310]
30.0 mg/L
45.0 mg/L
Weekly
Grab
Effluent
(November 1 — March 31)
Total Suspended Solids [00530]3
30.0 mg/L
45.0 mg/L
Weekly
Grab
Effluent
NH3 as N [00610]
(April 1- October 31)
4.8 mg/L
24.0 mg/L
Weekly
Grab
Effluent
NH3 as N [00610]
(November 1 - March 31)
21.7 mg/L
35.0 mg/L
Weekly
Grab
Effluent
Total Residual Chlorine4 [50060]
28 lug/L
2/Week
Grab
Effluent
Fecal Coliform [31616]
(geometric mean)
200/100 mL
400/100 mL
Weekly
Grab
Effluent
pH [00400]
> 6.0 and < 9.0 standard units
Weekly
Grab
Effluent
Dissolved Oxygen [00300]
Daily average > 5.0 mg/L
Weekly
Grab
Effluent
Dissolved Oxygen [00300]
Weekly
Grab
U & D
Temperature (OC) [00010]
Daily
Grab
Effluent
Temperature (OC) [00010]
Weekly
Grab
U & D
TKN (mg/L) 5 [00625]
Monitor and Report
Monthly
Grab
Effluent
NO3-N + NO2-N (mg/L)5 [00630]
Monitor and Report
Monthly
Grab
Effluent
Total Nitrogen (mg/L)5 [00600]
Monitor and Report
Monthly
Grab
Effluent
Total Nitrogen Load6
Monitor and Report
Monthly
Calculated
Effluent
[QM600 monthly]
(pounds/month)
[QY600 annual]
Report (pounds/year)
Annually
Calculated
Effluent
Total Phosphorus [00665]
Monthly
Grab
Effluent
Notes:
1. The permittee shall submit discharge monitoring data electronically using the Division's eDMR application
system [see A. (6.).
Page 3 of 8

Permit NCO040266
2. U: at least 50 feet upstream from the outfall. D: at least 200 feet downstream from the outfall.
3. If solids management at the facility is deemed inadequate, this permit may be reopened to increase TSS
monitoring to 3/Week (see A. 4).
4. The facility shall report all effluent TRC values reported by a NC certified laboratory (including field certified
laboratories). However effluent values < 50 µg/L will be treated as zero for compliance purposes.
5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Total Nitrogen Load is the mass quantity of Total Nitrogen discharged in a given period of time [see A. (2)
Calculation of Total Nitrogen Loads].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) CALCULATION OF TOTAL NITROGEN LOADS
[G.S. 143-215.1(b)]
a. The Permittee shall calculate monthly and annual Total Nitrogen (TN) Loads as follows:
i. Monthly TN Load (pounds/month) = TN x TMF x 8.34
where:
TN = the average Total Nitrogen concentration (mg/L) of the composite samples
collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the month (MG/month)
8.34 = conversion factor, from (mg/L x MG) to pounds
ii. Annual TN Load (pounds/year) = Sum of the 12 Monthly TN Loads for the calendar year
b. The Permittee shall report monthly Total Nitrogen results (mg/L and pounds/month) in the Discharge
Monitoring Report (DMR) for that month and shall report each year's annual results (pounds/year) in the
December DMR for that year.
A. (3.) TOTAL NITROGEN ALLOCATIONS
[G.S. 143-215.1(b)]
(a.) The following table lists the Total Nitrogen (TN) allocation(s) assigned to, acquired by, or transferred to the
Permittee in accordance with the Neuse River nutrient management rule (T15A NCAC 02B .0713) and the
status of each as of permit issuance. For compliance purposes, this table does not supersede any TN limit(s)
established elsewhere in this permit or in the NPDES permit of a compliance association of which the
Permittee is a Co-Permittee Member.
ALLOCATION
TYPE
SOURCE
DATE
ALLOCATION AMOUNT (1)
STATUS
Estuary
Discharge
(poundslyear)
(pounds/year)
Base
Assigned by Rule
1217/1997;
253
506
Active
(T15A NCAC 02B .0713)
4l1/2003
Footnote:
(1) Transport Factor =10%
Page 4 of 8

Permit NCO040266
A. (4.) SOLIDS MANAGEMENT REPORTS
[NCGS 143-215.3 (a) (2)]
The Permittee shall record solids depths in the clarifier(s) (using a sludge judge), sludge wasting events, onsite
sludge storage capacities, effluent TSS concentrations, and all sludge hauling records (frequency and volume).
This information must be documented for each ORC visitation at the treatment facility. Solids data must be
provided in a written report detailing how residuals are appropriately managed.
• Reports must be submitted to NC DEQ Raleigh Regional Office
• Reports are due by June 30't and December 3l't of each calendar year.
A. (5.) PERMIT RE -OPENER: NUTRIENT MANAGEMENT
[NCGS 143-215.1 (b)]
a) Pursuant to N.C. General Statues Section 143-215.1 and implementing rules found in Title 15A of North
Carolina Administrative Code, Subchapter 02H, specifically, 15A NCAC 02H.0112(b)(1) and
02H.0114(a), and Part II, Sections B.12 and B.13. of this Permit, the Director of DWR may reopen this
permit to require nutrient management measures for the discharge. The results of water quality
monitoring, modelling or other evaluations may require that conditions for total nitrogen and total
phosphorus control be imposed on this permit.
b) The Division may, upon written notification to the permittee, re -open this permit in order to incorporate
or modify effluent limits, monitoring and reporting requirements, and other permit conditions when it
deems such action is necessary to implement TMDL(s) approved by the USEPA.
A. (6.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final 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)l
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Page 5 of 8

Permit NC0040266
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 internet. The eDMR system may be
accessed at: hM2s://deq.nc.gov/about/divisions/water-resources/edmr.
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
following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
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, 2025, 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 should 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. Information on EPA's NPDES
Page 6 of 8

Permit NC0040266
Electronic Reporting Rule is found at: https://www.federalre�zister.gov/documents/2015/10/22/2015-
24954/national-pollutant-discharge-elimination-system-npdes-electronic-reporting-rule
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:
hllp:Hdeq.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:
7 certify, 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,
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Permit NCO040266
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.)]
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 8 of 8