NC0047384_Headworks Analysis_20180831

r
City of Greensboro
.J North Carolina Water Resources Department
2018 T. Z. OSBORNE POTW HEADWORKS ANALYSIS
Report Date: August 31, 2018
This Headworks Analysis Covers The Following Period:
January 1, 2017 through June 30, 2018
NPDES Permit Holder: CITY OF GREENSBORO, NORTH CAROLINA
T. Z. Osborne Wastewater Reclamation Facility NCO047384
For further information concerning this report contact:
Martie Groome
Laboratory and Industrial Waste Supervisor
[phone] [e-mail] RECEI /ED/DENR/DWR
Mailing Address: SEF 0 5 2018
City of Greensboro
T. Z. Osborne Wastewater Reclamation Facility Water ingResourcesecio
Permitting Section
Industrial Waste Section - Pretreatment Section
P.O. Box 3136
Greensboro, NC 27402-3136
I have personally examined and am familiar with the information submitted in this
document and attachments. Based upon my personal knowledge and my inquiry of
those individuals immediately responsible for obtaining the information reported
herein, I believe that the submitted information is true, accurate and comp ete.
'—A - 0-4/ �' QoAjV(-- � � -"- i I -,)C) I
Martie Groom' Date
This report was prepared by: Frank Skee and William Burdick
Frank Skee frank.skee @greensboro-nc.gov Date
1 �
William Burdick [e-mail]
Date
CITY OF GREENSBORO T. Z. OSBORNE 2018 HEADWORKS ANALYSIS

Date: August 31, 2018
To: Deborah Gore and Vivian Zhong
From: Greensboro Industrial Waste Section (Frank Skee, Bill Burdick & Martie Groome)
RE: Background for 2018 HWA Submittal
This document will provide background information on the City of Greensboro Water
Reclamation Division facilities and the recent changes since submittal of the previous HWA in
September 2017.
POTW Background Information
■ Until October 2017, the City of Greensboro operated 2 POTWs:
o T. Z. Osborne (TZO) POTW 40 MGD (opened in 1984-upgraded several times
since then) [Tertiary Activated Sludge]
o North Buffalo (NB) POTW 16 MGD (opened in 1928 and upgraded several times
since then) [Tertiary Activated Sludge]
■ There is a wastewater transfer line from the NB to TZO and for many years 6-7 MGD
was transferred (about %2 the flow entered the NB plant) to TZO
■ As part of the engineering design to comply with upcoming total nitrogen limits, the City
decided to upgrade TZO to operate as a single plant.
o TZO would be upgraded for total nitrogen
o TZO would be expanded from 40 MGD to 56 MGD to replace the 16 MGD flow
capacity at NB.
o The North Buffalo Transfer Station would be expanded and the NB site would
become strictly a pump station.
o This multi -year construction project is still on -going and should be complete in
the last quarter of 2020.
■ The pump station expansion is complete, NB was closed in October
■ Beginning in July 2017 the —6-7 MGD remaining at the NB plant was gradually shifted
(increase of about 0.5 MGD every 2 weeks) to TZO. All flow had been transferred by
October 7, 2017 when NB was closed.
2017 HWA Information
■ A TZO HWA was submitted to DEQ in September 2017 in response to the 5 year
requirement.
The 2017 TZO HWA covered the period from July 1, 2012 through December 2016 (4.5
years) and was based on the operation of the two plants.
The flow transferred from NB to TZO has always been treated as an SIU on the HWA
Allocation Table. You will see this line item on the 2017 HWA and the data was from
periodic sampling of the transfer line.
The NB HWA was also due October 1, 2017, but since the plant closed a week later, the
requirement was waived by Deborah Gore.

In conversations with Deborah Gore we stated that a new HWA would be needed within
a year to reflect the additional flow at TZO and the closure of NB.
The DEQ review of the 2017 HWA was not completed since a new HWA would be
forthcoming.
2018 HWA Submittal
■ This HWA reflects the operation of only TZO with its current permitted capacity of 40 MGD.
■ Note of course that the TZO flow has increased about 6 MGD since the last HWA which is to be
expected (-25%).
■ It is based on a limited data set of 1.5 years, but removal rates etc. seem consistent with the
previous HWA.
■ There were a few compliance issues during this HWA period. However, they were virtually all
from high flows during two 100-year storms that occurred in a two month period. We also had
tanks out of service as part of the upgrade and expansion.
Future HWAs COMING!
■ The TZO NPDES Permit expires in June 2019. At that time another HWA will be required as the
new NPDES permit will reflect the new WQS for metals.
■ In 2020 with the completion of the upgrade and expansion project another HWA will be required
due to the increase in permitted flow to 56 MGD and total nitrogen limits effective in 2021.
■ We are going to get plenty of experience in HWA!
Greensboro Local Pollutant Allocation Program
■ You will note as you review the Allocation Table that the City of Greensboro does not have limits
on BOD, TSS and certain metals for some SIUs. However, there is a local accounting and
enforcement system for conventional and metals for which there is significant capacity available.
■ You will see the "Local Pollutant Allocations" mentioned on the Permit Synopsis as well. These
values are issued to the industries SIUs in a separate local document (which is not part of the SIU
permit).
• This program has served the City of Greensboro and the industries well over the years.
Call if you have questions about any of this.
IMPORTANT SIU PERMIT SUBMITTAL INFORMATION:
All three of us worked on all of the 29 SIU permits. Bill Burdick chose 3 for his "official ones".
Frank and Martie have included a signed Streamlined Permit Review form to cover the others.
Many of the permits did not have any changes to name, permit #, pipe #, limits or treatment units.
Changes were made on the following permits:
SIU NAME
PERMIT CHANGES
Elastic Fabrics
Flow increase
Gilbarco
Cyanide limit increase
ITG Brands
Flow decrease
Lanxess
Flow increase
Procter & Gamble Brown Summit Pipe 01
Flow increase
Procter & Gamble Brown Summit Pipe 02
Flow decrease
Shamrock Brown Summit Pipe 01
Cyanide limit increase
Solenis
Flow increase

NC Division of Water Resources
Streamlined Industrial User Permit (IUP) Review
Streamlined Industrial User Permit Review Submittal Form
One form may cover multiple IUPs submitted together.
Program Name: CITY OFGREENSBORO, NORTH CAROLINA
WWTP Name: T. Z. OSBORNE NC0047384
Permit Renewals
SIU NAME/PERMIT #:
Date application(s) received
Date of most recent on -site inspection(s)
Date allocation table updated AUGUST
Are any changes to SIU name, IUP number, pipe number, limits or treatment units?
(Changes do not have to be listed here)
Permit Modifications:
Are any changes to SIU name, IUP number, pipe number, limits or treatment units?
(Changes do not have to be listed here)
I certify that the attached permit(s) has been prepared under my direct supervision and that the permit
meets the requirements of all applicable Federal and State Rules and requirements.
Signature of approved pe-r it writer
[e-mail]
Email Address: you will receive an email confirmation of receipt
Streamlined IUP Review Submittal Form: Version 1.0
Revision Dates: 2/16/2011
Date
0116
Approval number

NC Division of Water Quality
Streamlined Industrial User Permit (IUP) Review
Streamlined Industrial User Permit Review Submittal Form
One form may cover multiple IUPs submitted together.
Program Name: City of Greensboro
WWTP Name: T. Z. Osborne WWTP
Permit Renewals
Date applications) received see attached list
Date of most recent on -site inspection(s) see attached list
Date allocation table updated _September 1, 2018
Are any changes to SIU name, IUP number, pipe number, limits or treatment units?
(Changes do not have to be listed here)
Permit Modifications:
Are any changes to SIU name, IUP number, pipe number, limits or treatment units?
(Changes do not have to be listed here)
I certify that the attached permit(s) has been prepared under my direct supervision and that the permit meets the
requirements of all applicable Federal and State Rules and requirements.
Signature of approved permit writer
[e-mail]
Email Address: you will receive an email confirmation of receipt
Streamlined IUP Review Submittal Form: Version 1.0
Revision Dates: 2/16/2011
Aueust 31. 2018
Date
0112
Approval number