NC0070289_Fact Sheet_20240222

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO070289
Catherine Shadwell, Compliance & Expedited Permitting Unit / 919-707-3613 Oct 2023
FACILITY INFORMATION
Applicant/Facility Name
Stones Throw Homeowners Association (Jennifer Eggerichs)
Ridgewood Farms at Stones Throw WWTP
Applicant Address
maM
PO Box 690725 Charlotte NC 28227
Facility Physical
Address/Mailing Address
863 Olde Creek Trail Concord NC 28025
Permitted Flow (MGD)
0.05 MGD
Type of Waste
100% Domestic, < 1 MGD
Facility Class
WW-2
County
Cabarrus
Permit Status
Renewal
Regional Office
I MRO
STREAM CHARACTERISTICS
Receiving Stream
Caldwell Creek
Stream
Classification
C
Stream Segment
13-17-8-5
Outfall Lat.
350 17' 16" N
7Q10 - Summer (cfs)
0.72
Outfall Long.
800 35' 07" W
7Q10 - Winter (cfs)
1.5
Drainage basin
Yadkin -Pee Dee
30Q2 (cfs)
—
Subbasin
03-07-11
Average Flow (cfs)
8.3
HUC
030401050302
IWC (%)
9.72% (summer) /
4.91 % (winter)
303(d) List
Yes
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Does permit need Daily Max NH3 limits?
Already present in permit
Does permit need TRC limits/footnote?
Already present in permit
Does permit have toxicity testing?
No
Does permit have any Special Conditions?
es, Engineering assessment requirement (MRO still has
of yet received one
Does permit have instream monitoring?
Yes, U&D for Dissolved Oxygen and Temp
New expiration date:
November 30, 2028
Facility Summary
Stones Throw Homeowners Association runs their neighborhood Wastewater Treatment Plant. Ridgewood
Farms at Stones Throw WWTP is a small, private, 100% domestic system that feeds into Caldwell Creek.
The NPDES permit was originally issued in 1987. This facility utilizes the following treatment components:
• Duplex Influent pump station
• Bar screen
• Aerobic sludge holding/thickening tank
• Extended aeration
• Clarifier
• Tablet chlorination with contact basin
• Tablet dichlorination with contact basin
• Post aeration
Fact Sheet for Permit Renewal
Oct 2023 - NPDES Permit NCO070289 - Page 1

Renewal Summary
This renewal contains the following changes:
• Updated the effluent table in Section A. (1.) and A. (2.) with updated eDMR parameter codes.
• Updated Section A. (4) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
• Updated deadline for the Engineering Assessment in Section A. (3.).
Compliance Histor
25 NOVs since 2018, 5 enforcements since 2018 — 3 of which unpaid. According to most recent inspection
report, facility is in poor shape and poorly maintained. Facility has not yet turned in their engineering
assessment as required by 2020.
Comments on Draft Permit
• Received multiple emails from residents expressing their concerns on the facility failing, as well as
requesting a moratorium to prevent the new homes to be built from overwhelming the system.
• MRO requested that we omit the engineer's assessment in order for them to go ahead with the tap
moratorium. As well as allow them to issue a civil penalty for not acquiring a engineers assessment per
the previous permit.
Fact Sheet for Permit Renewal
Oct 2023 - NPDES Permit NCO070289 - Page 2

IWC Calculations
Facility: Ridgewood Farms at Stones Throw WWTP
Permit No.: NCO070289
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.05 0.2 <= Permitted Flow if Different from Design
Enter s7Q10 (cfs): 0.72
Enter w7Q10 (cfs): 1.5
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
s7Q10 (CFS)
0.72
0.72
s7Q10 (CFS)
0.72
0.72
DESIGN FLOW (MGD)
0.05
0.2
DESIGN FLOW (MGD)
0.05
0.2
DESIGN FLOW (CFS)
0.0775
0.31
DESIGN FLOW (CFS)
0.0775
0.31
STREAM STD (UG/L)
17.0
17
STREAM STD (MG/L)
1.0
1
Upstream Bkgd (ug/1)
0
0
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
9.72
30.10
IWC (%)
9.72
30.097087
Allowable Conc. (ug/1)
175
56
Allowable Conc. (mg/1)
8.2
2.8
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
Fecal Coliform
w7Q10 (CFS)
1.5
1.5
Monthly Average Limit:
200/100ml
200/100ml
DESIGN FLOW (MGD)
0.05
0.2
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.0775
0.31
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
1.8
Dilution Factor (DF)
10.29
3.32
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
4.91
17.13
Allowable Conc. (mg/1)
32.4
9.4
*213 .0404 (c) Applies
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, 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
* By Policy dischargers < 1 MGD get limits no lower than 2 & 4 due to BAT
* From 2B .0404(c) - Winter Limits can be no less stringent than 2 times the summer limits
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

IWC Calculations
Facility: Ridgewood Farms at Stones Throw WWTP
Permit No.: NCO070289
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.09 0.2 <= Permitted Flow if Different from Design
Enter s7Q10 (cfs): 0.72
Enter w7Q10 (cfs): 1.5
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
s7Q10 (CFS)
0.72
0.72
s7Q10 (CFS)
0.72
0.72
DESIGN FLOW (MGD)
0.09
0.2
DESIGN FLOW (MGD)
0.09
0.2
DESIGN FLOW (CFS)
0.1395
0.31
DESIGN FLOW (CFS)
0.1395
0.31
STREAM STD (UG/L)
17.0
17
STREAM STD (MG/L)
1.0
1
Upstream Bkgd (ug/1)
0
0
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
16.23
30.10
IWC (%)
16.23
30.097087
Allowable Conc. (ug/1)
105
56
Allowable Conc. (mg/1)
5.0
2.8
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Design
Permitted
Design
Permitted
Fecal Coliform
w7Q10 (CFS)
1.5
1.5
Monthly Average Limit:
200/100ml
200/100ml
DESIGN FLOW (MGD)
0.09
0.2
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.1395
0.31
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
1.8
Dilution Factor (DF)
6.16
3.32
Upstream Bkgd (mg/1)
0.22
0.22
IWC (%)
8.51
17.13
Allowable Conc. (mg/1)
18.8
9.4
*213 .0404 (c) Applies
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, 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
* By Policy dischargers < 1 MGD get limits no lower than 2 & 4 due to BAT
* From 2B .0404(c) - Winter Limits can be no less stringent than 2 times the summer limits
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

[External] Please help.
0.- 0
JR Jenny Reimer <[e-mail]> 0
To: Shadwell, Kate Thu 11/lfi/2023820 pM
CAU110M Ez4rnal email. Do net click links or open attacbmems unless cenfied Reportsuspluous emalls with the Report Message button locatetl on your
Outlook menu baronthe Hometab.
Hi Kate,
I live in Stones Throw in Concord. I had no idea there were any problems with the water or wastewater system when I bought
this home. Here is what the research is saying:
"'Since 2018 our plant was cited for 53 violations involving its failure to meet Permit requirements regarding discharging
improperly processed wastewater. There are 13 Fecal related violations.
Those 53 Violations are documented in 23 Notice of Violation letters. I did not include our NOV's for our Permit Violations listed
In our yearly compliance inspections.
We need a new system. This is a FACT. This plant is fragile, 35 years old and a rusted out bucket of metal. Any repairs they have
done on it have not stopped us from getting violations.
Representatives have asked the Permit Committee to place a moratorium on additional connections for the past several years.
But they have not been willing to do so.
The additional volume of 50+ homes being offered for sale in Stones Throw to a Commercial Developer will put the plant at 75%
capacity. This will destabilize the Plant causing more violations. The Plant is not going to magically operate better if we make it
work harder.
We need a connection Moratorium added
to the Permit to protect the Plant and ensure it will survive a bit longer until we can resolve this problem.""""
Please help. None of us have the money to fix this, but we all deserve better.
Thank you,
Len Landau

[External] Fwd: Stones Throw
q-
Begin forwarded message:
" Reply r4 Forward
From:Judy Walker judywalkerf4450gmad.com>
Date: November 17, 2023 at 12:15:59 PM EST
To: [e-mail]
Subject Stones Throw
Dear Ms. Shadwell,
My name is Judy Walker, my husband and myself bought a home in Stones Throw Developmentwith our retirement
money for our granddaughter to live in. The idea was she would buy it and we would have our money to retire on. We
weren totally informed about the situation with the wells and treatment plant being in such horrible condition. Now, we
don't want to saddle our granddaughter with this situation. An additional 50 houses would probably break the whole
system. There are families in this development that will be greatly hurt should this happen. Any help you can give us
would be greatly appreciated.
Thank you,
Judy Kay Walker

NORTH CAROLINA 2022 303(D) LIST
Rocky Yadkin -Pee Dee River Basin
AU Name
AU ID Description
McKee Creek
2424 From source to Reedy Creek
PARAMETER IR CATEGORY
IBenthos (Nar, AL, FW) 5
AU Number Classification
13-17-8-4 C
AU_LengthArea AU —Units
6.9 FW Miles
CRITERIA STATUS REASON FOR RATING 303D YEAR
] fxceeding Criteria Fair, Poor or Severe Bioclassification 1998
Caldwell Creek 13-17-8-5a C 6.0 FW Miles
2426 From source to Freeman Drive
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Benthos (Nar, AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassification 2008
Reedy Creek
13379 From source to McKee Creek
PARAMETER IR CATEGORY
Benthos (Nar, AL, FW) 5
Reedy Creek
13452 From McKee Creek to Rocky River
PARAMETER IR CATEGORY
Benthos (Nar, AL, FW) 5
13-17-8a C 8.1 FW Miles
CRITERIA STATUS REASON FOR RATING 303D YEAR
Exceeding Criteria Fair, Poor or Severe Bioclassification 2008
13-17-8b C 7.1 FW Miles
CRITERIA STATUS REASON FOR RATING 303D YEAR
Exceeding Criteria Fair, Poor or Severe Bioclassification 20081
Unnamed Tributary to Cold Water Creek (Lake 13-17-9-4-2-( WS-IV;CA 12.1 FW Acres
Concord)
13888 Northwest Arm of Lake Concord
PARAMETER IR CATEGORY CRITERIA STATUS IF= REASON FOR RATING 303D YEAR
Chlorophyll a (40 µg/I, AL, NC) 115 Exceeding Criteria 2018
Rocky River 13-17a C 34.1 FW Miles
2216 From source to mouth of Reedy Creek
PARAMETER IR CATEGORY CRITERIA STATUS
Turbidity (50 NTU, AL, FW miles) 5 Exceeding Criteria
Benthos (Nar, AL, FW) 5 Exceeding Criteria
REASON FOR RATING 303D YEAR
2020
Fair, Poor or Severe Bioclassification 1998
Rocky River 13-17b1 C 9.2 FW Miles
13483 From Clarke Creek to Mallard Creek
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Turbidity (50 NTU, AL, FW miles) 5 Exceeding Criteria 2016
Benthos (Nar, AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassification 2008
6/7/2022 NC 2022 303d List- Approved by EPA 4/30/2022 Page 190 of 192

Independent Tribune
Account Number
Advertising Affidavit
4019534
Date
October 27, 2023
NCDEQ-DIVISION OF WATER RESOURCES
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Date Category Description 3.08 Ad Number Ad Size
10/27/2023 Legal Notices Public Notice North Carolina Environmental Management Comi 0000851658 2 x 28 L
Public Notice
North Carolina EnvirornrlenlalManqement Commisssbn NPKS UnR
1617 Mail Service Center
Raleigh,NC IO$1611_
Notice of Intent to Issue a NPDES Wastewater Permit NCO070289
Ridgewood Farms at Stones Throw WWTP The North Carolina Environmen-
tal Management Commission proposes to issue a NPDES wastewater dis-
charge permit to the person(s) listed below. Written comments regarding
the proposed permit will be accepted 30 days after the publish date of
this notice. The Director of the NC Division of Water Resources (DWR)
may hold a public hearing should there be a significant degree of public in-
terest. Please mail comments and/or information requests to DWR at the
above address. Interested persons may visit the DWR at 512 N. Salisbury
Street, Raleigh, NC 27604 to review the information on file. Additional in-
formation on NPDES permits and this notice may be found on our website:
hfps://deg.nc.gov/public-notices-hearings,or by calling [phone].
Stones Throw Homeowners Association [P.O. Box 690725 Charlotte, NC
282271 has applied for renewal of NPDES permit NCO070289 for
Ridgewood Farms at Stones Throw WWTP in Cabarrus County. This per-
mitted facility discharges treated wastewater to Caldwell Creek in the
Yadkin -Pee Dee River Basin. Currently, ammonia nitrogen, fecal coliform,
and total residual chlorine are water quality limited. This discharge may
affect future allocations in this portion of the watershed.
Publish: October 27, 2023.
Publisher of
Independent Tribune
Cabarrus County
Before the undersigned, a Notary Public duly commissioned,
qualified, and authorized by law to administer oaths, personally
appeared the Publisher's Representative who by being duly sworn
deposes and says: that he/she is authorized to make this affidavit
and sworn statement; that the notice or other legal advertisement, a
copy of which is attached hereto, was published in the Independent
1012712023
and that the said newspaper in which such notice, paper document,
or legal advertisement was published, was at the time of each and
every such publication, a newspaper meeting all the requirements
and qualifications of Section 1-597 of the General Statutes of North
Carolina. 11 /J
Billing Representative
Newspaper reference: 0000851658
Sworn to and subscribed before me, this 27th day of October,
Notary Public
SSA n�1-20:)ej'; �'i
State of Virginia
CIO
,:r 'REGISTRPTiON
';
County of Hanover
329�49 wr
My commission expires:
P�-
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Stones Throw Homeowners Association
Attn: Jennifer Eggerichs
PO Box 690725
Charlotte, NC 28227
Dear Permittee,
\f QUhMNa j
NORTH CAROLINA
Environmental Quality
10/24/2023
Subject: Draft NPDES Permit NCO070289
Ridgewood Farms at Stones Throw WWTP
Grade II Biological WPCS
Cabarrus County
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:/ibit.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.shadwellgdeq.nc. og_v.
Sincerely,
Catherine Shadwell
NPDES Compliance and Expedited Permitting
D E Q�� 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
NORTH CAROLINA 919.707.9000
Depemnem of EnvlmnmenW Onlity

cc: NPDES File [Laserfiche]
Mooresville Regional Office [Laserfiche]

Permit NCO070289
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
1911101101111
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NEDES)
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 Contr ct, as amended,
Stones Throw Homeowne sociation
is hereby authorized to discharge wastewa er from a facility located at the
Ridgewood Farms at Sones Throw WWTP
863 Olde Creek Trail
Concord
— Cab s County
to receiving waters designated as t Caldwel)Creek the Yadkin -Pee Dee River Basin in accordance
with effluent limitations, monitorinj requirements, Ord other conditions set forth in Parts I, II, III and IV
hereof.
This permit shall becom
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 NCO070289
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
components: A
• 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 Iddobbb,
The facility is located at the
Concord) in Cabarrus Cgo
that includes the following
Throw WWTP (863 Olde Creek Trail,
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 NCO070289
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 Permittee asspecified below:
PARAMETERS
Limits
Monitoring Re uirements
Monthly
Daily
Measurement
Sample
Sample
eDMR Code
Average
Maximum
Fre ue cy
Type
Location'
Flow MGD
(MGD)
50050
0.050 MGD
Continuous
RecordingInfluent
or
Effluent
BOD 5-Day
April 1 to October 31
C0310
18.0 mg/L
27.0 mg/L
Weekly
Composite
Effluent
BOD, 5-day
November 1 to March 31
C0310
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
Total Suspended Solids
C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
NH3 as N
(April 1 to October 31
C0610
5.0 mg/L
25.0 mg/L
Weekly
Composite
Effluent
NH3 as N
November 1 to March 31
C0610
12.0 mg/L
35.0 mg/L
Weekly
Composite
Effluent
Dissolved Oxygen
00300
Daily Average > 5.0 mg/L
Weekly
Grab
Effluent
Dissolved Oxygen
00300
Monitor and Report
Weekly
Grab
Upstream &
Downstream
Fecal Coliform
(geometric mean
31616
200/100 mL
400/100 mL
Weekly
Grab
Effluent
TTRC otal Residual Chlorine
50060
28 pg/L
2/Week
Grab
Effluent
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 10011 from outfall. Downstream = at NCSR 1141.
3. The Division shall consider all effluent TRC values reported below 50 µg/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 (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 NCO070289
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
Monthly
Daily
Measurement
Sample
Sample
eDMR Code
Average
Maximum
Fre ue cy
Type
Location'
Flow MGD
(MGD)
50050
0.090 MGD
Continuous
RecordingInfluent
or
Effluent
BOD 5-Day
April 1 to October 31
C0310
18.0 mg/L
27.0 mg/L
Weekly
Composite
Effluent
BOD, 5-day
November 1 to March 31
C0310
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
Total Suspended Solids
C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
NH3 as N
C0610
5.0 mg/L
25.0 mg/L
Weekly
Composite
Effluent
April 1 to October 31
NH3 as N
November 1 to March 31
C0610
12.0 mg/L
35.0 mg/L
Weekly
Composite
Effluent
Dissolved Oxygen
00300
Daily Average > 5.0 mg/L
Weekly
Grab
Effluent
Dissolved Oxygen
00300
Monitor and Report
Weekly
Grab
Upstream &
Downstream
Fecal Coliform
(geometric mean
31616
200/100 mL
400/100 mL
Weekly
Grab
Effluent
Total Residual Chlorine
50060
28 iug/L
2/Week
Grab
Effluent
TRC
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:
l . 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/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 (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 4 of 7

Permit NCO070289
A. (3.) ENGINEERING ASSESSMENT
[NCGS 143-215.1 (b)]
The Permittee shall have a North Carolina Licensed Professional En ig neer 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 MONITO REPORTS
[G.S. 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge nitoring rep DMRs) and program reports.
The final NPDES Electronic Reporting Rule was adopted a came,&ffective on ecember 21, 2015.
NOTE: This special condition supplements or supersedes the ii
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Require nt
• 01Z
Section D. (2.) Repo ingA
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Simausedm0ection D. (2.) and Sect:
sections within Part II of this permit
The permittee shall re discharge monito'Wg data electronically using the NC DWR's Electronic
Discharge Monitoring 1ftrt (eDMR)Antemet application.
Monitoring results obtained d1lbilp previous month(s) shall be summarized for each month and submitted
monthly electronically using eVW. The eDMR system allows permitted facilities to enter monitoring data
and submit DMRs electronically using the intemet. The eDMR system may be accessed at:
https:Hdeq.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 permittee may seek an electronic reporting waiver from the Divi ' (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 6web
the snit cipient at the time of each
electronic submission. The permittee should use the Eresources to identify the initial recipient
for the electronic submission.
Initial recipient of electronic NPDES informatio PDE ulated facilities means the entity (EPA or
the state authorized by EPA to implement the NP S p t t is the designated entity for receiving
electronic NPDES data [see 40 CFR 127.Lb)].
EPA plans to establish a website th t will a]soTink to appropriate electronic reporting tool for each type of
electronic submission and for eac te. Instructions how to access and use the appropriate electronic
reporting tool will be available as w Information on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregiste menttI5/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electrons orting-rule
Electronic submissions nlstart by A dates listed in the "Reporting Requirements" section above.
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:
Page 6 of 7

Permit NC0070289
http://deq.nc.gov/about/divisions/water-resources/edmr
c. Signatory Rea uirements ISupplements Section B. (11.) (b) and Supersedes Section B. (11.) (d
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (I 1)(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' j eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENJIF1 CERTIFICATION WILL BE
ACCEPTED:
"I certify, under penalty of law, that this document and all at ments w repared under my direction or
supervision in accordance with a system designed to assur at qualified p nel properly gather and
evaluate the information submitted. Based on my inqui of the p n or persons who manage the system, or
those persons directly responsible for gathering the informatio te information submitted is, to the best of
my knowledge and belief, true, accurate, and complete. I am re that there are significant penalties for
submitting false information, including the possibility of fines prisonment for knowing violations. "
d. Records Retention [Supplements Section D.
The permittee shall retain records of al Disch rge M toring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of east 3 years from the date of the report. This period
may be extended by request of the D' at any tirfie [40 CFR 122.41 ].
Page 7 of 7

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Ridgewood Farms at Stones Throw WWTP
NPDES Permit NCO070289
Receiving Stream: Caldwell Creek Longitude: 80' 35' 07" W
Stream Index: 13-17-8-5 Latitude: 35' 17' 16" N
River Basin: Yadkin -Pee Dee Sub -Basin: 03-07-11
Stream Class: C HUC: 030401050302
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Location
Cabarrus County