NC0026051_Historical information_20171231

January 24, 2017
NG DENR Raleigh Regional Office
To whom it may concern,
All forms were e-mailed to [e-mail] on 1/24/17 as well.
iasi
Please find enclosed the copies of the Water Pollution Control System Operator Designation Form for
the Biological Grade IV system, Collection system, and Voluntary Reclaim Water system. All part of
the Triangle Waste Water Treatment plant
DURHAM
COUNTY Engineering and
Environmental Services
Utilities Division
WPCSOCC
3800 Barrett Dr.
Raleigh, NC 27609
5926 NC Highway 55 East, Durham, North Carolina 27713
[phone] | Fax [phone] | dconc.gov
Equal Employment/Affirmative Action Employer
Thank you,
Angela Rigsbee
Sr. Administrative Assistant
TWWTP
5926 NC Hwy 55 East
Durham, NC 27713
Ph: 919-560-9033
F: 919-544-8590
JAN 2 7 al? T-#
Stephanie Brixey - Interm Utility Division Manager / POTW Director 3>Permittee Owner/Officer Name:
5926 N.C. Highway 55 EastMailing Address:
Durham NC 27713 919-560-9034City: Zip: Phone #:State:
Email address:[e-mail]
Date:
Durham County Triangle WWTP NC0026051Permit #:Facility' Name:
DurhamCounty':
SUBMIT A SEPARATE FORM FOR EACH TYPE SYSTEM!
Land ApplicationPhysical/ChemicalBiological
Operator in Responsible Charge (ORC)
Shawn DavisPrint Full Name:Email:[e-mail]
Work Phone #:
Date:
Back-Up Operator in Responsible Charge (BU ORC)
Email. [e-mail] Full Name:Paul Langfield
919-560-9038Certificate Type / Grade / Number: WW 7 4/ 22943 Work Phone #:
Date: Signature:
Revised 05-2015
Mail, fax or email the
original to:
Mail or fax a copy to the
appropriate Regional Office:
Facility Type/Grade (CHECK ONLY ONE):
Collection Physical/Chemical Surface Irrigation
Water Pollution Control System Operator Designation Form
WPCSOCC
NCAC ISA 8G .0201
Wilmington
127 Cardinal Dr
Wilmington 28405-2845
Fax: [phone]
Phone: [phone]
Asheville
2090 US Hwy 70
Swannanoa 28778
Fax: [phone]
Phone: [phone]
Washington
943 Washington Sq Mall
Washington 27889
Fax: [phone]
Phone: [phone]
Winston-Salem
450 W. Hanes Mall Rd
Winston-Salem 27105
Fax: [phone]
Phone: [phone]
Raleigh
3800 Barrett Dr
Raleigh 27609
Fax: [phone]
Phone:[phone]
WPCSOCC, 1618 Mail Service Center, Raleigh, NC 27699-1618 Fax: [phone]
Email: [e-mail]
I
I
XJ
l
919-560-9036__
//zs//7
“J certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. I understand and will abide by the rules
and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G .0204 and failing to do so can result in Disciplinary
Actions by the Water Pollution Control System Operators Certification Commission.”
Fayetteville
225 Green St
Suite 714
Fayetteville 28301 -5043
Fax: [phone]
Phone: [phone]
Mooresville
610 E Center Ave
Suite 301
Mooresville 28115
Fax: [phone]
Phone: [phone]
Signature:
-------------------
“I certify that 1 agree/o my designation as>-Back-up Operator in Responsible Charge for the facility noted. 1 understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.”
Certificate Type A Grade / Number:^yyW / 4 / 992460
Signature:
WPCSOCC Operator Designation Form, cont.
NC0026051Facility Name: Durham County Triangle WWTP Permit #:
Back-Up Operator in Responsible Charge (BU ORC)
Mike Garver [e-mail] Full Name:Email:
WW / 4 / 996769 919-560-9033Work Phone #:
1- Signature: Date:
Back-Up Operator in Responsible Charge (BU ORC)
Stephanie Brixey [e-mail] Full Name:Email:
Work Phone #: [phone]
Date:
Back-Up Operator in Responsible Charge (BU ORC)
Print Full Name:Roy Harris Email: [e-mail]
WW/ 4 / 994035Certificate Type / Grade / Number:Work Phone #: [phone]
I'^3 ' 77Signature:Date:
Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by the
Back-Up Operator in Responsible Charge (BU ORC)
Print Full Name: Roy Lyons [e-mail]:
WW/3/ 1000624 Work Phone #:[phone]
Date:
Revised 05-2015
Certificate Type / Grade / Number:
“I certify that 1 agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. 1 understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.”
“I certify that I agree to my designation as a P ' ‘
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15 A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.”
Certificate Type / Grade / Number:
Signature:
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. 1 understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.”
Certificate Type / Grade / Number: WW / 4 / 1000636
Signature: M Date:
“I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disc.inlinarv Actions bv the Water Pollution Control System Operators Certification Commission.”
5926 NC Hwy 55 East
. NC 919-560-9034Phone #:
Email address:
Signature:
SUBMIT A SEPARATE FORM FOR EACH TYPE SYSTEM!
( Biological Land Application
[e-mail]:Print Full Name:
919-560-9036Work Phone #:
Signature: Date:
[e-mail]:
Date: Signature:
Revised 05-2015
WPCSOCC, 1618 Mail Service Center, Raleigh, NC 27699-1618 Fax: [phone]
Email: certadmin(ancdenr.gov
Operator in Responsible Charge (ORC)
Shawn Davis
"1 certify that I agree to my designation as the Operator in Responsible Charge for the facility noted. 1 understand and will abide by the rules
and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G .0204 and failing to do so can result in Disciplinary
Actions by the Water Pollution Control System Operators Certification Commission."
Mail, fax or email the
original to:
Mail or fax a copy to the
appropriate Regional Office:
Asheville
2090 US Hwy 70
Swannanoa 28778
Fax: [phone]
Phone: [phone]
Washington
943 Washington Sq Mall
Washington 27889
Fax: [phone]
Phone: [phone]
Wilmington
127 Cardinal Dr
Wilmington 28405-2845
Fax: [phone]
Phone: [phone]
Winston-Salem
450 W. Hanes Mall Rd
Winston-Salem 27105
Fax: [phone]
Phone: [phone]
Raleigh
3800 Barrett Dr
Raleigh 27609
Fax: [phone]
Phone:[phone]
Date:
Wate^^ollution Control System Operaflroesignation Form
WPCSOCC
NCAC 15A 8G .0201
Mooresville
610 E Center Ave
Suite 301
Mooresville 28115
Fax: [phone]
Phone: [phone]
Fayetteville
225 Green St
Suite 714
Fayetteville 28301-5043
Fax: [phone]
Phone: [phone]
I
Certificate Type / Grade / Number: WW 4 / 992460
Certificate Type / Grade / Number: WW 4 / 996769 Work Phone #: [phone]
Permit#: NC0026051
Rtate- NC 7. 27713 State:____Zip.________
[e-mail]
Permittee Owner/Officer Name- stePhanie Br>xey - Interim Utility Division Manager/POTW Director
Back-Up Operator in Responsible Charge (BU ORC)
Print Full Name: Mike Garver
Mailing Address:
Citv: Durham
“1 certify that 1 agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. 1 understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Facility Name: Durham County Triangle WWTP
County: Durham_______________
Facility Type/Grade (CHECK ONLY ONE):
Collection Physical/Chemical Surface Irrigation
WPCSOCC Operator Designation Form, cont.
[e-mail] Full Name:
919-560-9034Work Phone #:
Date:
Print Full Name:
Signature:Date:
Print Full Name:
-7 -Signature: Date:
Print Full Name:
Certificate Type / Grade / Nui Work Phone #:
Signature:2 Date:
Revised 05-2015
“I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the B(J ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Back-Up Operator in Responsible Charge (BU ORC)
Greg Johnson Email:
WW 4/27421
Signature: Date:
"1 certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
pp
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.”
Back-Up Operator in Responsible Charge (BU ORC)
R°y HarriS Email:
Certificate Type / Grade / Number: 994035
Back-Up Operator in Responsible Charge (BU ORC)
Stephanie Brixey Email.
rrt.r , T /r . /M k WW 4/ 1000636Certificate Type / Grade / Number: ■wwwwv
cfe/kAA/ Lt A_______________
Certificate Type / Grade / Number:
Date: //^^// Z
“I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. 1 understand and will abide by the
rules and regulations pertaining to the responsibilities of the BU ORC as set forth in 15A NCAC 08G .0205 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission.”
. [e-mail]
w v pt u 919-560-9033Work Phone #:
Permit#: NC0026051
[e-mail]
Work Phone#: [phone]
Facility Name: Durham County Triangle WWTP
Back-Up Operator in Responsible Charge (BU ORC)
Roy Lyons Email: [e-mail]
(er: WW 3/ 1000624 919-560-9033
NCState:
Date: Signature:
Permit# NC0026051
County:
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
wwFacility Type:
IVFacility Grade:
Print Full Name: Shawn Davis
BACKUP ORC
Print Full Name: Mike Garver
Certificate Grade: IV
Effective Date: 2 V
Email: [e-mail]
Revised 4/2016
Mail or Fax
a COPY to:
City:
Email Address: [e-mail]
Fayetteville
225 Green St., Suite 714
Fayetteville, NC 28301-5043
Fax: [phone]
Phone: [phone]
Mail, fax or email
ORIGINAL to:
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION FORM (WPCSOCC)
NCAC 15A8G .0201
Washington
943 Washington Sq. Mall
Washington, NC 27889
Fax: [phone]
Phone: [phone]
Asheville
2090 US Hwy 70
Swannanoa, NC 28778
Fax: [phone]
Phone: [phone]
Wilmington
127 Cardinal Dr.
Wilmington, NC 28405-2845
Fax: [phone]
Phone: [phone]
Winston-Salem
45 W. Hanes Mall Rd.
Winston-Salem, NC 27105
Fax: [phone]
Phone: [phone]
Raleigh
3800 Barrett Dr.
Raleigh, NC 27609
Fax:[phone]
Phone:[phone]
Mooresville
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Fax: [phone]
Phone: [phone]
OPERATOR IN RESPONSIBLE CHARGE (ORC)_____________________
Work Phone: [phone]
Certificate #: 992460
Facility Name: Durham County Triangle WWTP
Durham
Press TAB to enter information
Permittee Owner/Officer Name: Stephanie Brixey - Interim Utility Division Manager / POTW Director
Mailing Address: 5926 NC Hwy 55 East Phone: [phone]
Durham State: NC Zip: 27713
________________________________!
Work Phone: [phone]
Certificate H: 996769
WPCSOCC, 1618 Mail Service Center,
Raleigh, NC 27699-1618
Signature: r~?
"/ certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in 15A NCAC 08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Fax:[phone]
#226 P OO1 / 006910 64 A 859 0 02/28/2017 11-07
Certificate Type: WW
Email Address: mgarver@dconc:gov
Certificate Type: WW Certificate Grade: IV
Email Address: shddavis/gdconc.gov _________
Signature: Effective Date:
"I certify that I agree to my designation os the Operator in Responsible Charge for the facility noted. I understand andwill abide by the
rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC 08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
F ro m Dur ha rTi County T W W T’P
NCState:
Signature: ph(W u Date:
Permit# NC0026051
County:
YOU MUST SUBMIT A SEPARATE FORM FOR EACH TYPE AND CLASSIFICATION OF SYSTEM:
WW
IV
Print Full Name: Shawn Davis
Certificate Grade: IV
BACKUP ORC
Certificate Grade: IV
Effective Date:
Fax: [phone] EmaH: certadmin(S)ncdenr.gov
Revised 4/2016
Mail or Fax
a COPY to:
WATER POLLUTION CONTROL SYSTEM OPERATOR DESIGNATION FORM (WPCSOCC)
NCAC ISA 8G .0201
Wilmington
127 Cardinal Dr.
Wilmington, NC 28405-2845
Fax:[phone]
Phone: [phone]
Winston-Salem
45 W. Hanes Mall Rd.
Winston-Salem, NC 27105
Fax: [phone]
Phone: [phone]
Asheville
2090 US Hwy 70
Swannanoa, NC 28778
Fax: [phone]
Phone: [phone]
Washington
943 Washington Sq. Mall
Washington, NC 27889
Fax: [phone]
Phone: [phone]
Fayetteville
225 Green St., Suite 714
Fayetteville, NC 28301-5043
Fax: [phone]
Phone: [phone]
Mooresville
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Fax: [phone]
Phone: [phone]
Raleigh
3800 Barrett Dr.
Raleigh, NC 27609
Fax: [phone]
Phone: [phone]
Facility Type:
Facility Grade:
Facility Name: Durham County Triangle WWTP
Durham
Press TAB to enter information
Permittee Owner/Officer Name: Stephanie Brixey - Interim Utility Division Manager / POTW Director
Mailing Address: 5926 NC Hwy 55 East Phone: [phone]
City: Durham• state: NC zip; 27713
Email Address: [e-mail]
OPERATOR IN RESPONSIBLE CHARGE (ORC)_____________________
Work Phone: [phone]
Certificate#: 992460
Work Phone: [phone]
Certificate #: 996769
WPCSOCC, 1618 Mail Service Center,
Raleigh, NC 27699-1618
Mail, tax or email
ORIGINAL to:
Signature:
"I certify that I agree to my designation os a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC 086 .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
fl 2 2 & P O O1 / O 03
Print Full Name: Mike Garver
02/28/2017 11:05919 8890
Certificate Type: WW
Email Address: [e-mail]

Signature: Effective Date: ^2// 7
"I certify that I agree to my designation os the Operator in Responsible Charge for the facility noted. I understand ant/will abide by the
rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC 086 .0204 and foiling to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Certificate Type: WW
Email Address: [e-mail]
FromrDurMam Counly TW \AZ TP
WPCSOCC Operator Designation Form (continued)Page 2
Facility Name: Durham County Triangle WWTP NC0026051Permit #:
BACKUP ORC
Certificate Grade: IV
Effective Date:
Certificate Grade: IV
Certificate Grade: III
Email Address:
Certificate Grade: Select Certificate #:
Revised 4/2016
Certificate Type: Select
Email Address:
Signature:Effective Date:
"/ certify that / agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Work Phone: [phone]
Certificate #: 1000636
_______1
Print Full Name: Roy Lyons
BACKUP ORC
Print Full Name: Work Phone:
Certificate Type: WW
[e-mail]
Signature: Effective Date: (7
"I certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC 08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
BACKUP ORC__________ _______________________________ .
Work Phone: [phone]
Certificate #: 1000624
BACKUP ORC________________________________ _____
Work Phone: [phone]
Certificate #: 994035
9OO/<JOO <d 9SE «O69H r-rs) esiswo Li zioe / ws /so dlMAAI. Ajunoo u>HL|jna iijoi-i
. ____________________________
Print Full Name: Roy Harris
Certificate Type: WW
Email Address: [e-mail]
Signature: -....Effective Date:
"/ certify that I agree to my designation as a Back-up Operator in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC 08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
Print Full Name: Stephanie Brixey
Certificate Type: WW
Email Address: [e-mail]
Signature: ' VS/Ykaj ,i-v\Effective Date:
"I certify that I agree to my designation os a Back-up OpQptor in Responsible Charge for the facility noted. I understand and will abide by
the rules and regulations pertaining to the responsibilities of the ORC as set forth in ISA NCAC 08G .0204 and failing to do so can result in
Disciplinary Actions by the Water Pollution Control System Operators Certification Commission."
f I
DURHAM COUNTY
t Triangle Wastewater Treatment Plant
PERFORMANCE ANNUAL REPORT
JULY 2016 —JUNE 2017
1881 <
Contact:
Stephanie Bnxey
Acting Deputy Director
Owned and Operated
by:
DURHAM
COUNTY
Permits:
Wastewater
Treatment Plant:
NC0026051
Collection System:
WQCS00038
Stormwater:
NCG110054
Durham County
Engineering
&
Environmental Services
Utilities Division
Triangle Wastewater
Treatment Plant
5926 NC Hwy. 55 E.
Durham, NC 27713
[phone]
Reclaimed Water:
WQ0032821
TWWTP staff take
pride in their work
to ensure that our
effluent discharge is
of high quality to
protect Northeast
he Durham County Triangle Wastewater
Treatment Plant’s (TWWTP) effluent dis­
charges into Northeast Creek. Northeast
Creek flows into the New Hope Arm portion
of Jordan Lake near Highway 751 and has an aver­
age hydraulic retention time of 418 days before dis­
charging over the dam seventeen miles downstream.
Jordan Lake is a water supply source for several
communities, a recreational area for fishing and
swimming, and a habitat for many aquatic animals.
The Durham County
wastewater collection and
treatment system serves
over 10,000 residential,
commercial, and industrial
customers in Southeast
Durham County, including
the Research Triangle Park
/ y
- .
Northeast Creek Discharge Point (top left picture)
OT--
Creek.
7 . /
■
hfAj Acm
August 31, 2017
Notification
Lab & Pretreatnient
Prograni
Certification:
Acting Deputy Director
Amalgam
Separators
This Performance Annu­
al Report covering July
1, 2016 through June 30,
2017, was forwarded to
the NC Department of
Environmental Quality.
Public Notice of the re­
port was advertised in
the Durham Herald Sun
newspaper and is availa­
ble for review at the fol­
lowing locations
South Regional Library
4505 S. Alston Ave.
Clerk to the Board
200 East Mam St.
Main Library
300 N. Roxboro St.
Website
www.dconc.gov
I certify under penalty of law that
this report is complete and accu­
rate to the best of my
knowledge. I further certify that
this report has been made avail­
able to the users or customers of
the named system and that
those useis have been notified
of its availability.
Dental offices will not be considered Significant or Categorical Industrial
Users. They will be required to submit a one-time compliance report to
the POTW that will include information about the facility, the operation of
the facility, and a certification statement signed by an authorized
representative that the dental office meets the requirements of the final
rule. Additional information can be found at: https://www.epa.gov/eg/
dental-effluent-guidelines.
“EPA Issues a Final Rule Governing
Amalgam Separators”
EPA promulgated pretreatment standards to
reduce mercury discharges from dental
offices into the POTW under regulation 40
CFR Part 441 effective July 14, 2017. Any
dental offices that use or remove amalgam
must operate and maintain an amalgam
separator. If an existing dental office currently
has an amalgam separator, it must be
replaced with an ISO 11143 compliant amalgam separator after its
lifetime has ended but no later than June 14, 2027. New dental offices
must comply with the final rule immediately.
The TWWTP implements an Industrial
Pretreatment Program (IPP) to control pollutants
which may cause pass through or interfere with
the treatment plants processes, which may
contaminate sewage sludge, or potentially be
hazardous to workers health and safety.
Currently there are forty-three permitted industries
that are regularly inspected and monitored to
ensure their discharges meet specific permit limits.
Thirteen of these industries are Significant
Industrial Users (SIUs). Biosafety Laboratories in
our service area have also been identified.
Currently, thirteen of these labs are permitted.
Several of the Industrial Pretreatment Permit
holders are required to certify that their facility has
followed biosafety procedures consistent with the
fifth edition of the Biosafety in Microbiological and
Biomedical Laboratories US DHHS -PHS -CDC
and -NIH for the deactivation of Biosafety Level 1
2 3 or 4 materials prior to discharge to the sewer
system.
I he Triangle Wastewater Treatment Plants
(TWWTP) laboratory staff collects and analyzes
wastewater samples as required by the NPDES
permit and the reclaim water permit. Currently the
laboratory is certified by the Division of Water
Resources Laboratory Certification Branch to
analyze ammonia, biochemical oxygen demand
total residual chlorine, conductivity, dissolved
oxygen, fecal coliform. pH. temperature and total
suspended solids. Staff determines the age and
health of the activated sludge and identifies
microorganisms, such as amoebae bacteria,
cihates. flagellates nematodes, rotifiers. and water
bears.
r
Collection System
1.
i:
Biosolids System
&
Reuse Water
Projects &
Rehabilitation
T" he TWWTP generates waste biological residuals
I (approximately 600 million wet pounds per year),
which are dewatered by centrifuges. The dewatered
cake (approximately 14.5 million wet pounds per year)
is transported to McGill’s Composting, where it un­
dergoes further biological treatment to produce a
Class A biosolid. These biosolids are beneficially
used as soil amendments in commercial landscaping
and agricultural activities.
urham County owns and maintains
a wastewater collection system
which includes 95 miles of gravity
sewer, 9 miles of pressurized force
mains, and 13 pump stations.
In the past 12 months Durham County had
three reportable spills.
• On April 25, 2017, a spill estimated at 70
gallons of wastewater occurred resulting
from root intrusion into a sewer lateral line.
• On May 25, 2017, an estimated 750 gallons
spilled into a stormwater retention pond that
discharges to an unnamed tributary of Stir­
rup Iron Creek due to debris in the line.
• On June 13, 2017,a spill estimated at
1,101,450 gallons of wastewater, occurred
due to a collapsed section of sewer line.
The Durham County Utilities Division prides itself
on providing a high level of customer service. All
commercial and residential customers' questions and
concerns are responded to in a timely manner. If
you have a question or concern regarding the col­
lection system, services or any item covered in this
report, please call [phone].
T.-
I n the past year the County has continued its
I efforts to rehabilitate aging infrastructure and
I increase sanitary sewer capacity to facilitate
B increased population growth in our service area.
Construction started on the Stirrup Iron Pump
Station Improvement Project to install a grinder and
a new concrete pad for the odor control chemical
storage tank. The grinder will help limit solids build­
up in the wet well. Plans and specifications were
prepared to increase the capacity of the Slater Road
pump station. A sanitary sewer hydraulic model for
the Stirrup Iron pump station sewer basin was
developed to help direct the capital improvement
plan. Additionally, the old influent pump station was
demolished as part of our continued effort to
improve safety.
he Triangle Wastewater
Treatment Plant (TWWTP)
operates a reuse water system.
Some of the uses of this water include:
landscape irrigation, industrial cooling,
industrial process water and sewer
cleaning. Approximately 99.2 million
gallons of Reuse water was distributed
during the fiscal year.
Treatment System & Process4
5.0mg/1 Monthly Avg. Permit Limit 200 cfu/lOOml Monthly Avg. Permit Limit
<2.0mg/l
1.83 cfu/lOOml
BIOCHEMICAL OXYGEN DEMAND FECAL COLIFORM
1.0mg/l Monthly Avg. Permit Limit30 mg/1 Monthly Avg. Permit Limit
<0.1 mg/l<2.5 mg/1
TOTAL SUSPENDED SOLIDS AMMONIA-NITROGEN
111,207 lbs. Annual Permit Load Limit 8,432 lbs. Annual Permit Load Limit
89,702 lbs.
4,451 lbs
TOTAL NITROGEN TOTAL PHOSPHORUS
Clarifier
Effluent Annual Average Data
Ultraviolet (UV) Bulb System
The Clarifiers are where the biomass is separated from the treated
wastewater and then returned to the BNR for further treatment.
The Five Stage Biological Nutrient System is where all biological
treatment take place, such as removing ammonia through nitrification
and denitrification processes as well as the removal of phosphorus.
The Fine Screens are used to remove fine organic materials from the
wastewater such as grit, sand, egg shells, etc. All of the organic materials
are washed off and used in the biological treatment process.
The TWWTP was
compliant in all
sampling events
for the past year,
while treating 1.84
billion gallons of
wastewater.
The Chemical Polishing process removes any phosphorus that is
remaining after the biological treatment process. Methanol is used in
this polishing process to add additional BOD to support the denitrification
treatment process.
The Tertiary Filters are next in the clarification process that removes all
remaining unsettled biomass in the treatment process.
1 %
fen-J
The Reaeration stage of the
treatment process adds
dissolved oxygen to the treated
wastewater to meet required
permit limits before it is
discharged to Northeast Creek.
The Influent Pump Station (IPS) is used to pump raw wastewater
(sewage) to the treatment process to be biologically treated. The IPS is
sized for 12 million gallons per day average flow
The Ultraviolet Disinfection
treatment process is used to
remove all disease causing
bacteria without harmful by­
products.
■
August 25, 2017
To Whom It May Concern:
If you have any questions or concerns, please contact me at [phone] or e-mail [e-mail] .
Sincerely,
Enclosures
SAB/cs
cc: Jay Gibson, PE, General Manager
Greg Johnson, Utility Superintendent
Danny Smith, NCDENR DWR-Raleigh Regional Office - e-mail
CERTIFIED MAIL#
7007 0220 0004 2894 9978
Systems Performance Annual Report
North Carolina Department of Environmental Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Durham County TWWTP FY17 Performance Annual Report
DUPHAM
COUNTY
As required by House Bill 1160, the Durham County Engineering & Environmental Services Department,
Utility Division, is submitting three copies of the 2016-2017 Performance Annual Report for your review.
Stephanie Brixey
Acting Deputy Director
• iT
Engineering and
Environmental Setvjfces
Utilities Division