WQ0018755_NOV-2023-DV-0208_Resp Rvcd_20230522

NC Dept ol'Environmenutl (Quality
South Granville Water and Sewer Authority MAY 2 5 2023
May 22, 2023
Scott Vinson, Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
1628 Mail Service Center
Raleigh, NC 27699-1628
Re: Written Response to NOV-2023-DV-0208
South Granville Water and Sewer Authority
Collection System Permit No. WQCS00068
South Granville Water and Sewer Authority (SGWASA)
Granville County
Dear Mr. Vinson:
Raleigh Regional Office
I am writing to you in response to NOV-2023-DV-0208 which included Incident Numbers: 202300668
and 202300669. SGWASA received the May 8, 2023 NOV-2023-DV-0208 notification letter from
NCDEQ on May 18, 2023. Following is an overview and response by SGWASA to the two incidents.
Incident No. 202300668 (4/7/2023): Pump Station at 1230 E Middleton Dr., Creedmoor, NC
The overflow at this location occurred during a heavy rainfall event on 4/7/23. Rainfall recorded
during this event was 3-4 inches. The overflow total at this location (pump station #PS07) was
3,300 gallons, of which 3,300 gallons reached surface water. Crews inspected, cleaned and
applied lime to the area affected.
Based on a review of the weather conditions and site conditions observed by staff on initial arrival to
these overflows SGWASA submits that these discharges were unintentional, temporary and caused by
factors beyond the reasonable control of SGWASA and could not have been prevented by the exercise of
reasonable control.
Incident No. 202300669 (4/7/2023): 1972 W. B. Street Butner, NC
The overflow at this location occurred during a heavy rainfall event on 4/7/23. Rainfall recorded
during this event was 3-4 inches. The overflow total at this location (pump station #PS29) was
1,400 gallons, of which 1,400 gallons reached surface water. Crews inspected, cleaned and
applied lime to the area affected.
Based on a review of the weather conditions and site conditions observed by staff on initial arrival to
these overflows SGWASA submits that these discharges were unintentional, temporary and caused by
factors beyond the reasonable control of SGWASA and could not have been prevented by the exercise of
reasonable control.

Please find below information relative to the mitigation measures we are taking to eliminate the Inflow &
Infiltration (I&I) problems that affected the infrastructure noted above.
SGWASA continues to invest in professional engineering services to develop and perform I&I mitigation
strategies across the sanitary sewer system. The I&I studies/projects, although limited in scope presently,
are focused on areas that are causing issues with overflows, such as those highlighted above.
Furthermore, SGWASA continues making great progress on the design engineering for the I-85 Sanitary
Sewer System Improvement Project. The I-85 Sanitary Sewer System Improvement Project focuses on
improving two major sanitary sewer interceptors, along with several sanitary sewer pump stations that
feed into the interceptors. Two regional pump stations that are scheduled for upgrades include the E.
Middleton Rd. pump station and the Joe Peed pump station. The total estimated cost of the I-85 Sanitary
Sewer System Improvement Project is $70 million. The I-85 Sanitary Sewer System Improvement Project
will be put out for bid in the fall of 2024, with construction occurring shortly thereafter.
Based on the information in this letter, I hope it is apparent to the NCDEQ - Division of Water Resources
that SGWASA is actively, and aggressively pursuing system -wide improvements to the sanitary sewer
collection system. I hope that you take this into account as you determine what actions you will be taking
reearding the sanitary sewer overflows ihat_haveoccurred,_as-outlined above. - - -
I look forward to discussing this information further with you. Please contact me at your convenience.
Sincerely,
SCo t N. Schro /ew
Scott N. Schroyer, Executive Director
South Granville Water and Sewer Authority (SGWASA)
415 Central Avenue, Suite B.
Butner, NC 27509
919-575-3367 Ext. 312
[e-mail]
Cc: Dan Owens, SGWASA Utility Engineer
Robert Jackson, Distribution and Collection System Superintendent