NC0020354_Technical Correction_20210512

DocuSign Envelope ID: OED02EF7-F2F6-47ED-BB8A-CFF7BE6F01 CE
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Mr. John Poteat
Public Works and Utilities Director
Town of Pittsboro
P.O. Box 759
Pittsboro, North Carolina 27312
Dear Mr. Poteat:
NORTH CAROLINA
Environmental Quality
May 12, 2021
Subject: NPDES Permit Technical Correction
Permit NC0020354
Pittsboro WWTP/CPWRC
Chatham County
Grade IV Biological WPCS
SIC Code 4952
Division personnel have updated language covered in Special Condition A.(8.) Annual Nutrient
Limits — Jordan Lake of your permit. A minor technical correction has been issued to incorporate
this revised language.
This minor technical correction does not affect any other terms, conditions, or compliance actions
covered by the permit.
If you have any questions concerning this permit, please contact Nick Coco at [phone] or
via email at [e-mail].
Sincerely,
DocuSigned by: /lu, , f •'' `
C464531431644FE...
for S. Daniel Smith, Director
Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
Central Files
Ecopy: DWR/Raleigh Regional Office/Water Quality/Scott Vinson
NCH;H C.:ARC! IN D E
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center 1 Raleigh. North Carolina 27699-1617
919.707.9000
Department al Environmental Quality .

DocuSign Envelope ID: OED02EF7-F2F6-47ED-BB8A-CFF7BE6F01 CE
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Mr. Timothy R. Smith, Vice President
Chatham Park Investors LLC
105 Weston Estates Way
Cary, North Carolina 27513
Dear Mr. Smith:
NORTH CAROLINA
Environmental Quality
May 12, 2021
Subject: NPDES Permit Technical Correction
Permit NC0020354
Pittsboro WWTP/CPWRC
Chatham County
Grade III Biological WPCS
SIC Code 4952
Division personnel have updated language covered in Special Condition A.(8.) Annual Nutrient
Limits — Jordan Lake of your permit. A minor technical correction has been issued to incorporate
this revised language.
This minor technical correction does not affect any other terms, conditions, or compliance actions
covered by the permit.
If you have any questions concerning this permit, please contact Nick Coco at [phone] or
via email at [e-mail].
Sincerely,
DocuSigned by: 14 `1, l',,•'' `
C464531431644FE...
for S. Daniel Smith, Director
Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
Central Files
Ecopy: DWR/Raleigh Regional Office/Water Quality/Scott Vinson
NCH;H C.:ARC! IN D E
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center 1 Raleigh. North Carolina 27699-1617
919.707.9000
Department al Environmental Quality .

DocuSign Envelope ID: OED02EF7-F2F6-47ED-BB8A-CFF7BE6F01 CE
NPDES Permit NC0020354
A.(8.) ANNUAL NUTRIENT LIMITS - Jordan Lake
[T15A NCAC 02B .0270]
(a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits established under the
Jordan Lake Nutrient Management Strategy for NPDES wastewater dischargers are annual values
and apply on a calendar year basis. (The provisions of this special condition are limited to these
annual limits and do not apply to seasonal limits established in the Robeson Creek TMDL.)
(b.) For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP)
Load limit in this Permit if:
(i.) the Permittee's annual TN (or TP) Load is less than or equal to the effective limit, or
(ii.) the Permittee is a Co-Permittee Member of a compliance association.
(c.) If the Permittee is not a co-permittee member of a compliance association and the Permittee's
cumulative annual TN discharge exceeds the effective TN Load limit in this permit at any point
during the calendar year, the Permittee is in violation of its TN Load limit, and each day of a
continuing violation shall constitute a separate violation.
(d.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in
the Permittee's allocations.
(i.) Allowable changes include those resulting from purchase of TN (or TP) allocation from an
authorized mitigation banker, the Division of Mitigation Services, or other source allowed
under applicable regulations; purchase, sale, trade, or lease of allocation between the
Permittee and other dischargers; regionalization; and other transactions approved by the
Division.
(ii.) The Permittee may request a modification of the TN (or TP) Load limit in this Permit to
reflect allowable changes in its allocation(s).
(A) Upon receipt of timely and proper application, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Changes in TN (or TP) limits become effective on January 1 of the year following
permit modification. The Division must receive application no later than August 31 for
changes proposed for the following calendar year.
(iii.) Any requests for modification should be sent to:
NCDEQ/ DWR/ NPDES Programs
Attn: Jordan Lake Watershed Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
(e.) If the Permittee is a member and co-permittee of an approved compliance association on January
1 of a given year, its TN and TP discharges during that year are governed by that association's
group NPDES permit and the limits therein.
(i.) The Permittee shall be considered a Co-Permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
(ii.) Association roster(s) and members' TN and TP allocations will be updated annually and in
accordance with state and federal program requirements.
(iii.) If the Permittee intends to join or leave a compliance association, the Division must be
notified of the proposed action in accordance with the procedures defined in the
association's NPDES permit.
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Revised 5/12/2021

DocuSign Envelope ID: OED02EF7-F2F6-47ED-BB8A-CFF7BE6F01 CE
NPDES Permit NC0020354
(f.)
(A) Upon receipt of timely and proper notification, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
The TN and TP monitoring and reporting requirements in this Permit remain in effect throughout
the term of the Permit and are not affected by the Permittee's membership in a compliance
association.
A.(9.) CALCULATION AND REPORTING OF NUTRIENT LOADS
[G.S. 143-215.1 (b)]
The Permittee shall calculate and report monthly and annual nutrient loads as follows:
(a.) Calculation of Discharge Loads (Outfalls 001A, 001B and 002): The Permittee shall calculate
monthly and annual discharge loads for each outfall as follows:
(i.) Monthly Discharge Load (lb/mo, TN or TP) = TN (or TP) x TMF x 8.34
where:
TN (or TP) = the average Total Nitrogen (or Total Phosphorus) concentration
(mg/L) of the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 = conversion factor, from (mg/L x MG) to pounds
(ii.) Annual Discharge Load (lb/yr, TN or TP) = Sum of the 12 Monthly TN (or TP) Loads for the
calendar year
(b.) Calculation of Delivered Loads (Outfalls CO1 and CO2): The Permittee shall calculate annual
delivered loads as follows:
(i.) Individual Outfalls 001A, 001B & 002:
Annual Delivered Load (lb/yr, TN or TP) = Annual Discharge Load (lb/yr) x TF
where TF = Transport Factor for each outfall, as specified in Condition A.(5.),
Nutrient Allocations and Limits.
(ii.) Combined Outfall C01:
Annual Delivered Load (lb/yr, TN or TP) = Sum of the Outfalls 001A & 001B Annual
Delivered TN (or TP) Loads for the calendar year
(iii.) Combined Outfall CO2:
Annual Delivered Load (lb/yr, TN or TP) = Sum of the Outfalls 001A, 001B & 002 Annual
Delivered TN (or TP) Loads for the calendar year
(c.) Reporting of Nutrient Discharges: The Permittee shall report monthly TN and TP discharge loads
for Outfalls 001 and 002 in the appropriate discharge monitoring report.
(d.) Reporting of Combined Delivered Loads: The Permittee shall:
(i.) report each calendar year's combined delivered TN and TP loads for Outfalls CO1 and CO2
with the December report for that year;
(ii.) report each summer season's combined TP loads for Outfall C01 (April 1 - October 31) with
the November report for that year; and
(iii.) if requested by the Division, provide a summary of its calculations for these loads.
Page 16 of 25
Revised 5/12/2021