NC0021636_Nitrient Sharing Request_20230206

•
p ■ HARNETT
REGIONAL
rWATER www.harnettwater.org
PO Box 1119
700 McKinney Parkway
)11ECEI
VE'D , NC 27546
January 31, 2023
FEB 0 6 2023
ph: 910-893-7575
fax: [phone]
Ms. Kristen Litzenberger �g p-� /gam ® �+NCDEQ NCDEQ DWR�NPDES
Division of Water Resources
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699
RE: Harnett Regional Water
North Regional WWTP NPDES No. NC0021636
South Regional WWTP NPDES No. NC0088366
Nutrient Sharing Request
Dear Ms. Litzenberger: -
The North Regional WWTP and South Regional WWTP NPDES permits include-seasonal nutrient limits in
total pounds during the winter months. The North Regional WWTP currently has a'discharge volume of
7.5 MGD and the permit includes 59,968 lbs. ofTN.and 19,989Ibs. of TP for the period between April 1
through October 31 of each year. The South Regional WWTP permit has a discharge volume of 15 MGD
and the permit includes 160,629 lbs. of TN and 54,543 lbs. of TP for the same period of April 1 through
October 31. HRW has recently submitted a request to expand the North Regional WWTP permit from 7.5
MGD to 16.5 MGD.The speculative limits that were provided to HRW included the same poundage for TN
and TP as is currently listed in the NPDES permit.
In May 2022, HRW requested that the South Regional WWTP NPDES permit-be expanded from 15 MGD
to 17.5 MGD but HRW recently withdrew that request and now requests that the permit be renewed for
a discharge volume of 15 MGD.
HRW is requesting that a nutrient sharing agreement be established between the two facilities where the
facilities have the ability to share a total of 220,596 lbs.TN and 75,532 of TP as a seasonal total poundage
limit for the two facilities.
Alternatives for sharing the nutrient load between the two facilities have been discussed with NCDEQ.
While the initial request would be for the ability to completely share between the two facilities, if that is
not possible at this time, HRW requests that a portion of the South Regional WWTP nutrient allocation be
transferred to the North Regional WWTP NPDES permit.The allocation would be based on the percentage
of flow as shown in the table below.

HARNETT REGIONAL WATER
NORTH REGIONAL WWTP NPDES NO.NC 0021636
SOUTH REGIONAL WWTP NPDES NO.NC 0088366
NUTRIENT TRANSFER REQUEST
TN TP
FLOW % CURRENT PROPOSED CURRENT PROPOSED
NORTH 16.5 MGD 52.4% 59,968 LBS 115,550 LBS 19,989 LBS 38,517 LBS
SOUTH 15.0 MGD 47.6% 160,628 LBS 105,046 LBS 53,543 LBS 35,015 LBS
TOTAL 31.5 MGD 1.000 220,596 LBS 220,596 LBS 73,532 LBS 73,532 LBS
HRW requests that 55,582 lbs. of TN and 18,525 lbs.of TP be transferred from the South Regional WWTP
NPDES permit to the North Regional WWTP NPDES permit.
HRW appreciates the assistance from NCDEQ on this project. If we can provide any additional information,
please contact me at this office.
Sincerely,
Steve Ward -
Director -
cc: Michael Montebello, NCDEQ
Ken Pohlig, NCDEQ
Joe McGougan, MBD
www.harnettwater.org