NC0034703_Fact Sheet_20240718

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
NCDEQ/DWR/NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO034703
Caroline Robinson/Compliance&Expedited Permitting Unit/[e-mail]/June 2024
FACILITY INFORMATION
Rowan- Salisbury Schools(Jamie Durant, Chief Operations
Applicant/Facility Name Officer)
Knollwood Elementary School WWTP
Applicant Address/Mailing PO Box 2349, Salisbury,NC 28145
Address
Facility Physical Address 3075 Shue Road, Salisbury NC 28147
Permitted Flow(MGD) 0.011 MGD
Type of Waste 100%Domestic,< 1 MGD
Facility Class WW-2 County Rowan
Permit Status Renewal Regional Office MRO
STREAM CHARACTERISTICS
Receiving Stream Little Creek Stream C
Classification
Stream Segment 12-110-3 Outfall Lat. 350 37'29"N
7Q 10 - Summer(cfs) 0.6 Outfall Long. 800 34'22" W
7Q 10 -Winter(cfs) 1.4 Drainage basin Yadkin-Pee Dee River Basin
30Q2 (cfs) 1.8 Subbasin 03-07-04
Average Flow(cfs) 8 HUC 030401030101
IWC (%) 2.76%(summer)/ 303(d)List No
1.20%(winter)
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Does permit need Daily Max NH3 limits? No—Already present in permit
Does permit need TRC limits/footnote? No—Already present in permit
Does permit have toxicity testing? No—not a complex wastestream
Does permit have any Special Conditions? Yes,Nutrient Reopener for High Rock Lake
Does permit have instream monitoring? No
New expiration date: June 30,2029
FACILITY SUMMARY
Rowan- Salisbury Schools operates a 100%domestic wastewater treatment plant for an estimated
population of 750 people. The Knollwood Elementary School WWTP is a minor facility(flow< I MGD)
with a design capacity and permitted wastewater discharge of 0.011 MGD. The original NPDES permit was
issued in September 1981. This facility utilizes the following treatment components:
• Grease trap
• Bar screen
• Equalization basin
• Aeration basin
• Clarifier
• Dosing tank
• Distribution box
• Surface sand filter
• Chlorine contact tank with tablet chlorinator and tablet de-chlorination
Fact Sheet for Permit Renewal
June 2024-NPDES Permit NCO034703-Page 1

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
• Ultrasonic flow meter
RENEWAL SUMMARY
This renewal contains the following changes:
• Updated eDMR language for electronic data submission in Part I. A. (3).
• Reporting for Total Nitrogen(TN)now includes the constituent parameters used in calculating TN,
to comply with the current NCDEQ water treatment plant strategy. Total Kjeldahl Nitrogen(TKN)
and Nitrate+Nitrite Nitrogen(NO3-N+NO2-N)have been added to the effluent table in Section
A. (1)with a corresponding footnote. The Sample Type for Total Nitrogen has been updated from
"Grab"to"Calculated".
COMPLIANCE HISTORY
Knollwood Elementary School WWTP has had one enforcement on record for a fecal coliform limit
violation in August 2022. The facility has been issued 18 NOVs for Fecal Coliform and Total Suspended
Solids limit violations and one proceed to enforcement case since the permit was originally issued in July
2019.
Most recent inspection(August 2022)showed the facility to be in compliance. On June 9,2022,the
permittee requested to move the effluent sampling point out of manhole to a constructed sampling point.
The Division sent an approval letter dated June 24,2022,to the permittee. Inspection of the new sampling
point was conducted August 4, 2022.
Fact Sheet for Permit Renewal
June 2024-NPDES Permit NCO034703-Page 2

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
IWC Calculations
Facility: Knollwood Elementary School WWTP
Permit No.: NC0034703
Prepared By:Caroline Robinson
Enter Design Flow(MGD): 0.011 <= Permitted Flow if Different from Design
Enter s7Q10(cfs): 0.6
Enter w7Q10(cfs): 1.4
Total Residual Chlorine(TRC) Ammonia(Summer)
Daily Maximum Limit(ug/1) Monthly Average Limit(mg NH3-N/1)
Design Permitted Design Permitted
s7Q10 (CFS) 0.6 s7Q10(CFS) 0.6 €
DESIGN FLOW (MGD) 0.011 DESIGN FLOW(MGD) 0.011 €
DESIGN FLOW (CFS) 0.01705 DESIGN FLOW(CFS) 0.01705
STREAM STD(UG/L) 17.0 STREAM STD(MG/L) 1.0
Upstream Bkgd (ug/1) 0 Upstream Bkgd (mg/1) 0.22
IWC(%) 2.76 IWC(%) 2.76
Allowable Conc. (ug/1) 615 Allowable Conc. (mg/1) 28.4 €
Ammonia(Winter)
Monthly Average Limit(mg NH3-N/1)
Design Permitted Design Permitted
Fecal Coliform w7Q10(CFS) 1.4
Monthly Average Limit: 200/100ml #VALUE! DESIGN FLOW (MGD) 0.011
(If DF>331; Monitor) DESIGN FLOW (CFS) 0.01705 €
(If DF<331; Limit) STREAM STD(MG/L) 1.8
Dilution Factor(DF) 36.19 #VALUE! Upstream Bkgd (mg/1) 0.22
IWC(%) 1.20
Allowable Conc.(mg/1) 131.5 €
*2B .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)

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
Permit Enforcement History by Permit
Permit: NC0034703 Facility: Knollwood Elementary School Owner: Rowan-Salisbury Schools
Region: Mooresville County: Rowan
Penalty Remission Enforcement EMC Collection Has
Assessment Penalty Enforcement Request Conference Hearing Memo Sent Payment Case
Case Approved Amount Costs Damages Received Held Held To AGO Total Paid Balance Due Plan Closed
LR-1990-0012 01/24/90 $150.00 $0.00 $0.00 02/15/90 04/04/90 $150.00 $0.00 No 05/24/90
LV-2000-0259 06/30/00 $250.00 $82.17 $332.17 $0.00 No 07/31/00
LV-2002-0371 08/29/02 $250.00 $85.45 $335.45 $0.00 No 09/13/02
LV-2022-0300 11/02/22 $369.39 $161.39 $530.78 No
Total Cases: 4 $1,019.39 $329.01 $817.62 $530.78
Total Penalties: $1,348.40 Total Penalties after $1,348.40

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
MONITORING REPORT(MR)VIOLATIONS for: Report Date: 04/09/24 Page 1 of 2
Permit: NCO034703 MRS Betweel 7 - 2019 and 4 - 2024 Region: % Violation Category:Limit Violation Program Category: NPDES WW
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO034703 FACILITY: Rowan-Salisbury Schools-Knollwood Elementary COUNTY: Rowan REGION: Mooresville
School
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
09-2020 001 Effluent Chlorine,Total Residual 09/15/20 2 X week ug/I 28 29 3.6 Daily Maximum No Action, BPJ
Exceeded
12-2020 001 Effluent Chlorine,Total Residual 12/18/20 2 X week ug/I 28 36 28.6 Daily Maximum No Action, BPJ
Exceeded
09-2022 001 Effluent Chlorine,Total Residual 09/20/22 2 X week ug/I 28 35 25 Daily Maximum No Action, BPJ
Exceeded
09-2022 001 Effluent Chlorine,Total Residual 09/21/22 2 Xweek ug/I 28 36 28.6 Daily Maximum No Action, BPJ
Exceeded
08-2019 001 Effluent Coliform, Fecal MF, MFC 08/13/19 Weekly #/100ml 400 613 53.3 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
12-2019 001 Effluent Coliform, Fecal MF, MFC 12/04/19 Weekly #/100ml 400 461 15.3 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
11-2020 001 Effluent Coliform, Fecal MF, MFC 11/05/20 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
08-2021 001 Effluent Coliform, Fecal MF, MFC 08/18/21 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
02-2022 001 Effluent Coliform, Fecal MF, MFC 02/23/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
03-2022 001 Effluent Coliform, Fecal MF, MFC 03/02/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
03-2022 001 Effluent Coliform, Fecal MF, MFC 03/24/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
03-2022 001 Effluent Coliform, Fecal MF, MFC 03/30/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
03-2022 001 Effluent Coliform, Fecal MF, MFC 03/31/22 Weekly #/100ml 200 589.06 194.5 Monthly Geometric Mean Proceed to NOV
Broth,44.5 C Exceeded
04-2022 001 Effluent Coliform, Fecal MF, MFC 04/06/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
04-2022 001 Effluent Coliform, Fecal MF, MFC 04/13/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
MONITORING REPORT(MR)VIOLATIONS for: Report Date: 04/09/24 Page 2 of 2
Permit: NCO034703 MRS Betweel 7 - 2019 and 4 - 2024 Region: % Violation Category:Limit Violation Program Category: NPDES WW
Facility Name:% Param Nam(% County: % Subbasin:% Violation Action:%
Major Minor: %
PERMIT: NCO034703 FACILITY: Rowan-Salisbury Schools-Knollwood Elementary COUNTY: Rowan REGION: Mooresville
School
Limit Violation
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
08-2022 001 Effluent Coliform, Fecal MF, MFC 08/17/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to
Broth,44.5 C Exceeded Enforcement Case
10-2022 001 Effluent Coliform, Fecal MF, MFC 10/05/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
11-2022 001 Effluent Coliform, Fecal MF, MFC 11/17/22 Weekly #/100ml 400 2,419.6 504.9 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
02-2023 001 Effluent Coliform, Fecal MF, MFC 02/10/23 Weekly #/100ml 400 613 53.3 Daily Maximum Proceed to NOV
Broth,44.5 C Exceeded
03-2020 001 Effluent Solids,Total Suspended- 03/04/20 Weekly mg/I 45 68.24 51.6 Daily Maximum Proceed to NOV
Concentration Exceeded
03-2020 001 Effluent Solids,Total Suspended- 03/31/20 Weekly mg/I 30 43.02 43.4 Monthly Average Proceed to NOV
Concentration Exceeded
01-2022 001 Effluent Solids,Total Suspended- 01/20/22 Weekly mg/I 45 107.3 138.4 Daily Maximum Proceed to NOV
Concentration Exceeded
01-2022 001 Effluent Solids,Total Suspended- 01/31/22 Weekly mg/I 30 35.16 17.2 Monthly Average Proceed to NOV
Concentration Exceeded

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
SafisbtjryPost Publisher's Affidavit Of Publication
STATE OF NORTH CAROLINA No.1819165
ROWAN COUNTY
Public Notice
Before the undersigned, a Notary Public of said county and North Carolina Environmental
state, duly commissioned, qualified, and authorized by law Management Commission/
NPDES Unit
to administer oaths, personally appeared JOHN CARR,who 1617 Mail Service Center
being first duly sworn, deposes and says that he is PUB- Raleigh,NC 27699-1617
LISHER of the SALISBURY POST,published,issued and en- Notice of Intent to Issue a NPDES
tered as second class mail in the city of Salisbury,in Rowan Wastewater Permit NCO034703
Knollwood Elementary School
County, North Carolina, that he is authorized to make this WWTP The North Carolina Envi-
affidavit and sworn statement,that the notice or other legal ronmental Management Commis-
sion proposes to issue a NPDES
advertisement, a true copy of which was attached hereto, wastewater discharge permit to
was published in the SALISBURY POST, on the following the person(s)listed below. Written
comments regarding the proposed
dates: permit will be accepted 30 days af-
ter the publish date of this notice.
05/02/24 The Director of the NC Division of
Water Resources(DWR)may hold
a public hearing should there be a
significant degree of public inter-
est. Please mail comments and/
and that the said newspaper in which such notice, paper or information requests to DWR
document or legal advertisement was published at the time at the above address. Interested
g p persons may visit the DWR at 512
of each and every such publication, a newspaper meeting N. Salisbury Street, Raleigh, NC
all the requirements and qualifications of Section 1-597 of 27604 di review the information on
q q file.Additional information on NP-
the General Statutes of North Carolina, and was a qualified DES permits and this notice may
newspaper within the meaning of Section 1-597 of the Gen- be found o/ our website: -heahftps:r-
g deq.nc.gov/public-notices-hear-
eral Statutes of North Carolina, ings,or by calling(919)707-3601.
Rowan-Salisbury Schools ap-
plied to renew NPDES permit
NCO034703 for Knollwood Ele-
mentary School WWTP (3075
Shue Road,Salisbury)in Rowan
Account#: 312891 County.This facility discharges to
Ta line: SP-NOI Wastewater e the Little Creek in the Yadkin-Pee
9 p Dee River Basin.Currently ammo-
Purchase Order#: nia nitrogen,fecal coliform,and to-
tal residual chlorine(TRC)are wa-
ter quality limited.This discharge
may affect future wasteload allo-
cations in the Little Creek.
Publish Salisbury Post:05/02/24.
(signature of person making affidavit)
Sworn and subscribed before me on 05/02/24.
Notary Public
r
My commissitf expirIA,05/02/202-6
O UNA

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
Etat STATE��Q
ROY COOPER = o
Governor
ELIZABETH S.BISER `
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
June 24, 2022
Mr. Anthony Vann
Rowan-Salisbury Schools
P.O. Box 2349
Salisbury, NC 28145-2349
Subject: NPDES Permit NCO034703
Change of effluent sampling location
Knollwood Elementary School
Rowan County
Dear Mr. Vann:
The Division hereby approves your proposed relocation of the effluent sampling point for
the subject permit. Thank you for discussing this matter with the Mooresville Regional Office
staff prior to making your request.
This change does not require any changes to the text of your permit, so this approval letter
is all you need to proceed with the location change.
This permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the
legal requirements to obtain other permits which may be required by any other Federal, State, or
Local governmental regulation.
If you have any questions concerning this matter, please contact Charles H. Weaver
[[e-mail]].
Sincerely,
( DDocuSigned by:
8328644CE9EB4A1...
Richard E. Rogers, Jr., Director
Division of Water Resources
ec: NPDES Unit(Laserfiche)
North Carolina Department of Environmental Quality I Division of Water Resources
NORTH
-,&cnaouNnD E 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh,North Carolina 27699-1611
o�mmemmem­maio..i� 111 919.707.9000

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
R•wa n-Sa I isbu ry Rowan-Salisbury School System
SC H OOL SYSTEM PO Box2349
r.1--d--y Education Ewy Dory
u,;o.igi„u,. Salisbury, NC 28145
Phone:[phone]
June 9, 2022
Mr. Charles H. Weaver, Environmental Specialist II
NC-DEQ, Division of Water Resources
SUBJECT: Knollwood Elementary School
Request to Relocate Effluent Sampling Location
NPDES Permit No. NCO034703
Rowan County
To whom it may concern,
In response to the facility having experienced recurrent fecal coliform
exceedances in the previous months, Rowan-Salisbury School System formally
requests that the effluent sampling point at the Knollwood Elementary School
WWTP be moved closer to the dechlorination box.
The 0.011 MGD Grade II Biological wastewater treatment plant serving
Knollwood Elementary School is currently utilizing a manhole located
approximately 100 feet downstream of the dechlorination box as the primary
effluent sampling point. In view of the distance between the dechlorination box
and the effluent sampling point, the effectiveness of this sampling point for
obtaining a representative and accurate sample has come into question. At this
distance, we believe that residual chlorine has dissipated to an extent that does
not reflect the chlorination and dechlorination process taking place on-site. As
well, there is a high probability of foreign matter entering the manhole and
contaminating the effluent.
The concern has been communicated to Mr. Roberto Scheller (NCDEQ-DWR,
WQRO, Mooresville Regional Office) who has expressed support for moving
the effluent sampling point, based on discussions between Rowan-Salisbury
Schools and the WWTP ORC. We intend to create a shallow manhole and a
trough to be placed approximately 6 feet downstream of the dechlorination box
In compliance with federal law,the Rowan-Salisbury School System administers all educational programs,employment
activities and admissions without discrimination because of race,religion,national or ethnic origin,color,age,military service,
disability,or gender,except where exemption is appropriate and allowed by law.

Docusign Envelope ID:DF87A794-088F-4BF2-BCAE-3E630696C8C4
to be used as the new sampling point. This trough would be outside of the fence
boundary surrounding the school. With the school having reduced capacity this
summer, this would grant us the ability to construct the new manhole in low-to-
no flow conditions, which may reduce the impact upon effluent compliance if
granted the ability to begin construction during this period. We appreciate your
time and consideration.
S cerely
�V/
Anthony ann
Rowan-Sa isbury Schools
Chief Operations Officer
cc: Todd Robinson, Envirolink, Inc.
Josh Powers, Envirolink, Inc.
Roberto Scheller, NCDEQ-DWR
Emily Phillips, NCDEQ-DWR
Christopher Nuckolls, Rowan-Salisbury Schools
In compliance with federal law,the Rowan-Salisbury School System administers all educational programs,employment
activities and admissions without discrimination because of race,religion,national or ethnic origin,color,age,military service,
disability,or gender,except where exemption is appropriate and allowed by law.

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Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
From: Pitner,Andrew
To: Scheller,Roberto
Cc: Robinson,Caroline
Subject: FW: Draft Permit Review NCO034703
Date: Friday,April 12,2024 1:44:43 PM
Attachments: NCO034703 Draft Fact Sheet 2024.Ddf
NCO034703 Draft Permit 2024.Ddf
Outlook-1ttaidoa.Dna
Hey Roberto,
Please review for the MRO and send Caroline any comments with a cc to me. Thanks,
Andrew
Andrew Pitner, P.G. [e-mail]
Division of Water Resources - Water Quality Regional Operations
Mooresville Regional Office (MRO)
North Carolina Department of Environment& Natural Resources
610 East Center Avenue, Suite 301, Mooresville, NC 28115
MRO Main Phone: [phone]
Direct Office Phone: [phone]
MRO Fax: [phone]
DWR website: http://www.ncwater.org
NOTICE: Email correspondence to and from this address is subject to the North Carolina Public Records
Law and may be disclosed to third parties unless the content is exempt by statute or other regulation.
From: Robinson, Caroline<[e-mail]>
Sent: Friday, April 12, 2024 12:52 PM
To: Pitner, Andrew<[e-mail]>; Talbott, Jeffrey<[e-mail]>
Subject: Draft Permit Review NCO034703
Hi Andrew and Jeffrey,
The NCO034703 draft permit renewal is ready for review! The draft permit renewal for the
Knollwood Elementary School WWTP (NC0034703)will go to Notice on 4/30/2024. Please send
me any comments as time permits.
Thanks,
Caroline
Caroline Robinson (she/her/hers)
Environmental Specialist II, Division of Water Resources
North Carolina Department of Environmental Quality
Office: [phone] 1 Cell: [phone]

Docusign Envelope ID: DF87A794-088F-4BF2-BCAE-3E630696C8C4
carol ine.robinsonnded.nc.gov
Q:>
NORTH CAROLINA -
Department of Environmental Quality
Email correspondence to and from this address is subject to the North
Carolina Public Records Law and may be disclosed to third parties.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties by an authorized state official.