NC0070289_Draft Permit_20231024

ROY COOPER _�•
Governor ,
ELIZABETH S.BISER
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
10/24/2023
Stones Throw Homeowners Association
Attn: Jennifer Eggerichs
PO Box 690725
Charlotte,NC 28227
Subject: Draft NPDES Permit NC0070289
Ridgewood Farms at Stones Throw WWTP
Grade II Biological WPCS
Cabarrus County
Dear Permittee,
The Division has reviewed your request to renew the subject permit. Please review this draft carefully to ensure a
thorough understanding of the information, conditions,and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
• Section A. (4.) has been updated to require electronic submission of
effluent data reports (DMRs). Federal regulations require electronic
submittal of all discharge monitoring.
• An updated outfall map has been included.
• Engineering Assessment deadline in Section A. (3.)has been updated
Please note that Caldwell Creek is listed as an impaired waterbody on the North Carolina 303(d)
Impaired Waters List. Addressing impaired waters is a high priority with the Division, and instream
data will continue to be evaluated. If there is noncompliance with this permit's effluent limits and
stream impairment can be attributed to your facility, then mitigative measures may be required.
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 https://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 Cabarrus County area,per EPA requirements. Please provide your
comments, if any,to me at the 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
[phone] or via e-mail at kate.shadwellAdeq.nc.gov.
Sincerely,
Catherine Shadwell
NPDES Compliance and Expedited Permitting
D ...., North inannm ofEnmen u I esources� 5l2 NorthCarol SalisburyDepar Stintt I l617 Mailo Servicetal Centerlity I RalDivisioneighof,NorthWater CarRolina 2 7699-1617
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cc: NPDES File[Laserfiche]
Mooresville Regional Office[Laserfiche]

Permit NC0070289
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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 Conct, as amended,
Stones Throw Homeowneipts ociation
is hereby authorized to discharge wastew from facility mated at the
ith
Ridgewood Farms at Sones Throw WWTP
863 Olde Creek Trail
Concord
Cabarrus County
to receiving waters designated as t Caldwell Creek in the Yadkin-Pee Dee River Basin in accordance
with effluent limitations, monitorin uirements, and other conditions set forth in Parts I, II, III and IV
hereof.
This permit shall become tive
This permit and authorization to discharge shall expire at midnight on November 30, 2028.
Signed this day
Richard E. Rogers Jr.
Director,Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

Permit NC0070289
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 described herein.
Stones Throw Homeowners Assocation
is hereby authorized to:
1. Continue to operate an existing 0.050 MGD wastewater treatment cility that includes the following
components:
• Duplex influent pump station
• Bar screen
• Aerobic sludge holding/thickening tank
• Extended aeration
• Clarifier
• Tablet chlorination w/contact basin
• Tablet dechlorination w/contact basin
• Post aeration
The facility is located at the Rid Stones Throw WWTP (863 Olde Creek Trail,
Concord) in Cabarrus C
110
2. Discharge from said treatment works via Outfall 001, at the location specified on the attached
map, into Caldwell Creek, a waterbody currently classified C [Stream Index: 13-17-8-5] within
subbasin 03-07-01[HUC: 030401050302] of the Yadkin-Pee Dee River Basin.
Page 2 of 7

Permit NC0070289
PART I.
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade II Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until expansion above 0.50 MGD or
expiration, the Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and
monitored' by the Pennittee as specified below:
PARAMETERS Limits Monitoring Requirements
eDMR Code Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location,
Flow(MGD) 50050 0.050 MGD Continuous RecordingInfluent or
Effluent
BOD 5-Day C0310 18.0 mg/L 27.0 mg/L Weekly Composite Effluent
(April 1 to October 31)
BOD, 5-day C0310 30.0 mg/L 45.0 mg/L.:, Weekly Composite Effluent
(November 1 to March 31)
Total Suspended Solids C0530 30.0 mg/L 45.0 pVL ',Weekly Composite Effluent
NH3 as N
C0610 5.0 mg/L 250 mg/L Weekly Composite Effluent
(April 1 to October 31) �,:.,.
NH3 as N
(November 1 to March 31) C0610 12.0 mg/L. 35.0mglL Weekly Composite Effluent
Dissolved Oxygen 00300 Daily Average>5.0*I_�:. Weekly Grab Effluent
,e- Upstream&
Dissolved Oxygen 00300 Monitor and Report Weekly Grab Downstream
Fecal Coliform 31616 200/100 mL '400/100 mL Weekly Grab Effluent
(geometric mean)
Total Residual Chlorine 50060 28 Ng/L 2/Week Grab Effluent
(TRC
)3
Temperature °C 00010 Monitor and Report Daily Grab Effluent
Temperature °C 00010 Monitor and Report Weekly Grab Upstream&
Downstream
Total Nitrogen(NO2+NO3+TKN) C0600 Monitor and Report Quarterly Composite Effluent
Total Phosphorous C0665 Monitor and Report Quarterly Composite Effluent
pH 00400 > 6.0 and<9.0 Standard Units Weekly Grab Effluent
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's
eDMR system [see A. (4.)].
2. Sample Locations: Upstream=at least 100ft from outfall. Downstream=at NCSR 1141.
3. The Division shall consider all effluent TRC values reported below 50 µg/1 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(including field certified), even if these values fall below 50 µg/l.
All samples collected should be from a representative discharge event.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN
OTHER THAN TRACE AMOUNTS
Page 3 of 7

Permit NC0070289
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade II Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning upon expansion above 0.050 MGD 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:
PARAMETERS Limits Monitoring Requirements
eDMR Code Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location2
Flow MGD 50050 0.090 MGD Continuous RecordingInfluent or
(MGD) Effluent
BOD 5-Day C0310 18.0 mg/L 27.0 mg/L Weekly Composite Effluent
(April 1 to October 31)
BOD,5-day C0310 30.0 mg/L 45.0 mg/L Weekly Composite Effluent
(November 1 to March 31)
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L''4�`" , , Weekly Composite Effluent
as N C0610 5.0 mg/L 25 mg/L 'Weekly Composite Effluent
(April 1 to October 31)
NH3 as N C0610 12.0 mglL `35.0 nigIL Weekly Composite Effluent
(November 1 to March 31) ,„
Dissolved Oxygen 00300 Daily Average>5.0 41, Weekly Grab Effluent
Upstream&
Dissolved Oxygen 00300 Monitor andRReport Weekly Grab Downstream
Fecal Coliform 4
(geometric mean) 31616 200/100 mL 400/100 mL Weekly Grab Effluent
Total Residual Chlorine 50060 28 pg/L 2/Week Grab Effluent
(TRC)3 ,
Temperature °C 00010 Monitor and Report Daily Grab Effluent
Af
Temperature °C 00010 )r Monitor and Report Weekly Grab Upstream&
Downstream
Total Nitrogen (NO2+NO3+TKN) Ct00' Monitor and Report Quarterly Composite Effluent
Total Phosphorous C0665 Monitor and Report Quarterly Composite Effluent
pH 00400 >6.0 and <9.0 Standard Units Weekly Grab Effluent
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's
eDMR system [see A. (4.)].
2. Sample Locations: Upstream=at least 100ft from outfall. Downstream=at NCSR 1141.
3. The Division shall consider all effluent TRC values reported below 50 µg/1 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 (including field certified), even if these values fall below 50 µg/1.
All samples collected should be from a representative discharge event.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN
OTHER THAN TRACE AMOUNTS
Page 4 of 7

Permit NC0070289
A. (3.) ENGINEERING ASSESSMENT
[NCGS 143-215.1 (b)]
The Permittee shall have a North Carolina Licensed Professional Engineer evaluate the structural
integrity and operational efficiency of this facility to ensure the integrity of the treatment system. The
assessment's details and conclusions must be submitted to both the NC DEQ Mooresville Regional
Office and the NPDES program no later than 60 days after this permit's effective date.
Based on the findings of the assessment, a permanent solution for addressing all necessary repairs, with
a timeline, shall be developed and implemented. This permit may be reopened to include a schedule of
compliance for facility repairs, and /or alterations of the exiting permit limits and monitoring
frequencies.
A.(4.) ELECTRONIC REPORTING-DISCHARGE MONITORING REPORTS
[G.S. 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring rep DMRs)and program reports.
The final NPDES Electronic Reporting Rule was adopted a , "`-came ective on ecember 21,2015.
NOTE: This special condition supplements or supersedes the • . ing sections within Part II of this permit
(Standard Conditions for NPDES Permits):
)111IP
• Section B. (11.) Signatory Require I
• Section D. (2.) Report' _
• Section D. (6.) R. .s Ret, ion
• Section E. (5.) • •ri
I. Reporting Requirements 1Superse a ection D. (2.) and Section E.(5.)(a)1
The permittee shall re;' °discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring ' .•rt(eDMR)internet application.
Monitoring results obtained . . a , previous month(s)shall be summarized for each month and submitted
monthly electronically using e P .' . The eDMR system allows permitted facilities to enter monitoring data
and submit DMRs electronically using the internet. The eDMR system may be accessed at:
https://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
Page 5 of 7

Permit NC0070289
See"How to Request a Waiver from Electronic Reporting" section below.
Monitoring results obtained during the previous month(s)shall be summarized for each month and reported
via the eDMR system no later than the last calendar day of the month following the completed reporting
period. 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; and
• Pretreatment Program Annual Reports; and
• Clean Water Act(CWA) Section 316(b) Annual Reports.
The pennittee may seek an electronic reporting waiver from the Divis (see"How to Request a Waiver
from Electronic Reporting"section below).
a. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the permittee must identify the inrtialrecipient at the time of each
electronic submission. The permittee should use the EP4 s weber 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 th• sill als ink to the appropriate electronic reporting tool for each type of
electronic submission and for eac ctions on how to access and use the appropriate electronic
reporting tool will be available as w- onnation on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregiste - 20 1 5/1 0/22/20 1 5-24954/national-pollutant-discharge-elimination-
system-npdes-electroni •orting- -
Electronic submissions tart by dates listed in the"Reporting Requirements"section above.
b. How to Request a Waive Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver, a pennittee 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:
Page 6 of 7

Permit NC0070289
http://deq.nc.gov/about/divisions/water-resources/edmr
c. SiDnatory Requirements (Supplements Section B.(11.) (b)and Supersedes Section B. (11.)(d)l
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)eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTM CERTIFICATION WILL BE
ACCEPTED:
"I certj, 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. 1 am aware that there are significant penalties for
submitting false information, including the possibility of Ines aprisonment for knowing violations."
d. Records Retention (Supplements Se tion D. (6.)1
The permittee shall retain records of all Disc rge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintain or a 'od of at least 3 years from the date of the report. This period
may be extended by request of the r at any time [40 CFR 122.41].
Page 7 of 7

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Ridgewood Farms at Stones Throw WWTP N �
NPDES Permit NC0070289
Receiving Stream: Caldwell Creek Longitude: 80° 35'07" W Facility Akek,,.
Stream Index: 13-17-8-5 Latitude: 35° 17' 16"N Location
River Basin:Yadkin-Pee Dee Sub-Basin: 03-07-11 SCALE
Stream Class: C HUC: 030401050302 t:to,000 Cabarrus County