NC0081426_Permit Issuance_20060508

Michael F. Easley, Governor
State of North Carolina
May 8, 2006
Mr. Allan Williams
City of Greensboro
P.O. Box 3136
Greensboro, North Carolina 27402-3136
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Subject: NPDES PERMIT ISSUANCE
Permit Number NCO081426
N.L. Mitchell WTP
Guilford County
Dear Mr. Williams:
Division personnel have reviewed and approved your application for renewal of the subject
permit. Accordingly, we are forwarding the attached final NPDES discharge permit. This permit is
issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated May 9, 1994 (or as subsequently amended).
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty (30) days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-
6714). Unless such demand is made, this permit shall be final and binding.
Please take notice that this permit is not transferable. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Water Quality or
permits required by the Division of Land Resources, Coastal Area Management Act, or any other
Federal or Local governmental permits which may be required.
If you have any questions or need additional information, please do not hesitate to contact
Carolyn Bryant of my staff at [phone], extension 363.
tSincerely,G�� .
lanc't.Klunek, P.E.
or, Division of Water Quality
cc: Central Files
NPDES Unit Files
Winston-Salem Regional Office/Surface Water Protection
1617 MAIL SERVICE CENTER. RALEIGH. NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]

2
Permit NCO081426
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended, the
City of Greensboro
is hereby authorized to discharge wastewater from a facility located at the
N.L. Mitchell WTP
1041 Battleground Avenue
Greensboro
Guilford County
to receiving waters designated as North Buffalo Creek in the Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective July 1, 2006.
This permit and -authorization to discharge shall expire at midnight on June 30, 2011.
Signed this day May 8, 2006.
forAW* , Klimek, P.E., Director
D' 'sion of Water Quality
By Authority of the Environmental Management Commission

d
It.
Permit NC0081426
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or
discharge are hereby revoked. As of this permit issuance, any previously issued
permit bearing this number is no longer effective. Therefore, the exclusive authority
to operate and discharge from this facility arises under the permit conditions,
requirements, terms, and provisions included herein .
The City of Greensboro is hereby authorized to:
1. Continue. to operate a water treatment plant with a discharge of filter -backwash
wastewater. This facility is located in Greensboro at the N.L. Mitchell WTP on
Battleground Avenue in Guilford County.
2. Discharge from said treatment works at the location specified on the attached
map into North Buffalo Creek, classified C-NSW waters in the Cape Fear River
Basin.

Permit NC0081426
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Locations
Flow
Weekly
Instantaneous
Effluent
Total Suspended Solids
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
Settleable Solids
0.1 ml/L
0.2 NIL
Weekly
Grab
Effluent
Turbidity2
Weekly
Grab
Upstream & Downstream
Iron
Weekly
Grab
Effluent
Total Residual Chlodne3
17 Ng/L
Weekly
Grab
Effluent
Aluminum
Weekly
Grab
Effluent
Footnotes:
1. Upstream = at least 50 feet upstream from the outfall. Downstream = at least 50 feet downstream from the
outfall.
2. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU. If the
instream turbidity exceeds 50 NTU due to natural background conditions, the discharge cannot cause
turbidity to increase in the receiving stream.
3. The TRC limit will take effect January 1, 2008. Until then, the permittee shall monitor TRC [with no effluent
limit].
All samples must be collected from a typical discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

NC0081426, NC0081671
Subject: NC0081426, NCO081671
From: Corey Basinger <[e-mail]>
Date: Fri, 17 Mar 2006 08:48:28 -0500
To: Carolyn Bryant <[e-mail]>
Carolyn,
I've reviewed the draft permits for NL Mitchell WTP (NC0081426) and Lake Townsend WTP
(NC0081671). I have no corrections. Proceed to issuance.
Thanks!
Corey
Corey Basinger
[e-mail]
NC DENR Division of Water Quality
585 Waughtown Street
Winston-Salem, NC 27107
[phone]
Fax [phone]
Corey Basinger <Corey.Basinger(a,NCmail.net>
WSRO
NC DENR
1 of 1 3/17/2006 8:50 AM

I
News & Record
North Carolina, Guilford County
Published by
News & Record, Inc.
Greensboro, North Carolina
Affidavit of Publication
3/17/2006
Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to
administer oaths, personally appeared the Publisher's Representative who being first duly sworn, deposed and says:
1. That he/she is the Publisher's Representative of the Greensboro News & Record, Inc. a corporation, engaged in the
publication of newspapers known as "News & Record", published, issued and entered as second class mail in the City of
Greensboro in said County and State.
2. That he/she is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement,
a copy of which is attached hereto, was published in the News & Record on the dates listed below.
3. That the said newspaper (or newspapers) in which such notice, paper, document, or legal advertisement was published
was, at the time of each and every such publication, a newspaper meeting all of the requirements and qualifications of
Section 1-597 of the General Statutes of North Carolina and was a qualified newspaper within the meaning of Section 1-597
of the General Statutes of North Carolina. 1 A _ A
Name
Publisher's Representative l y#' L-ly 1AAJ&'-*V r lit/
Sworn to and subscribed before me, this day of 2006.
,w
CAhA
I;:.f:0rsl. a,:. 8 A23 , b
Notary Public
My commission expires: August 23, 2010
Ad # Date Edition
Class PO Ad Copy
WATER QUALITY BUDGET OFFICE 8138740 03/17/06 News & Record 400 NCO078000 PUBLIC NOTICESTATE O

Ad # 18138740 Date 03/16/2006 Time 11:40 AM
PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION/
NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENTTO ISSUE A
NPDES WASTEWATER PERMIT
On the basis of thorough staff review and appli-
cation of NC General Statute 143.21, Public law
92-500 and other lawful standards and regyula-
tions, the North Carolina Environmental Man-
agement Commission proposes to issue a Na-
tional Pollutant Discharge Elimination System
(NPDES) wastewater discharge permit to the
person(s) listed below effective 45 daysfrom
the publish date of this notice
Written comments reaardina the proposed Per-
information on tile used to determi
tions present In the draft permit are
ity mine aoove aaaress or to
Brandt at [phone], ext
include the NPDES permit nu
any communication. Intere
also visitthe Division of Wate
Salisbury Street, Raleigh, N
tween the hours of 8:00 a.m
review information on file.
BrentaB Southeast, Inc has a
of NPDES permit NCO078000
remediation system located
site. This Permitted facility r
M
boro NC 27402-311
NPD ES perm it num
M
may arrest ruture auocaP
the Cape Fear River Basin.
c m eet-
Division
0u p.m. to
x renewal
sundwater (J
reensboro
as treated
der)to an
o Creek in
no param-
sever,this
onsin this
fi•.Greens-
Ad
shown is not actual print size

=WATE R
Resources
City of Greensboro
Administration Mrs. Carol Bryant
[phone] Carolyn Y
Fax [phone] NC DENR / DWQ / Point Source Branch
1617 Mail Service Center
Customer Service Raleigh, NC 27699-1617
[phone]
Fax [phone] Dear Mrs. Bryant:
Water Supply This letter is to request renewal of an existing NPDES permit. Please find
Mitchell Plant enclosed a completed permit renewal package for the City of Greensboro's N. L. Mitchell
[phone] Water Treatment Plant NPDES permit # NC0081426. Since the current permit was
Fax [phone] issued, the plant's filters have been rebuilt but this work had no significant effect on the
Townsend Plant quantity or quality of the discharge.
[phone] Information supplied in this package was compiled b Kell Patton. If additional
Fax [phone] PP P g P Y Y
information is needed, please contact him at 336 373 7643.
Thank you for your assistance.
Water Reclamation
North Buffalo Plant
[phone]
Fax [phone] Sincerely,
T.Z. Osborne Plant
[phone]
Fax [phone]
Allan E. Williams, PE
Construction & Director of Water Resources
Maintenance
(336) 3 73 -203 3
Fax [phone]
Meter Services
[phone]
Fax [phone]
Water Conservation
[phone]
Fax [phone]
Stormwater
Management
[phone]
Fax [phone]
P. O. Box 3136, Greensboro, NC 27402-3136 • www.greensboro-nc.gov • TDD [phone]

NPDES PERMIT APPLICATION - SHORT FORM C-WTP
For discharges associated with conventional water treatment plants
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number NC00 S 112 (0
Please print or type
1. Contact Information:
Facility Name
N. L - JVIA�CIU.- LAI 7 p
Owner Name
C1TS/ OF &k42zJ11z;d 0A0
Street Address
®, 13!?x 3/3e
city
GRF45-A1)3c7R0
State / Zip Code
IVOR7tl 64A40 ./i09 275 CO21— 3l3 6
Telephone Number
(3-6)
Fax Number
( )
e-mail Address
A Y'Yor7 02Utye4.7ha-,zno —n c , mo o ✓
Operator Name0.
KELLY���..�
Street Address
i01// 131774c6Aw4,o r, Ug•.
City
Ce:N-C3 Dv'e.O
State / Zip Code
- il/O,� 72 XI C49L X 4 AL9 2,2�40g
Telephone Number
(334) 3,9.3 7g 03
2. Location of facility producing discharge:
Facility Name (If different from above) �V, . �til,17Gilerl
Street Address or State Road Z0-Y-1 •W77AZ�ROU" h1Z 6.
City / Zip Code GyeLcA, 4j1,3 M0 ; IVY- 2 % -YU 9
County IC..FOR.D
3. Standard Industrial Classification (SIC) Codes: %Vie? Z' C S 2 / 3 / D _
4. Principal process(es): ZV&&— /?AL. P0A1.9z,6
5. Ownership Status:
Federal 0 State El
6. Check here if discharge is continuous 0
If not continuous,
Frequency of discharge during the day:
Private 0
Frequency of discharge during the month (week):
7. Number of separate discharge points:
8. Description of source water(s) (i.e. groundwater or surface water)
Public Z
Page 1 of 2 Version -08103

NPDES PERMIT APPLICATION — SHORT FORM C—WTP
For discharges associated with conventional water treatment plants
9. Name of receiving stream(s) (Provide of map of exact location of each outfall, including latitude and
Iongitude: _ __ _ _ _ _ _ . __ _.... & . 1 ,ft,;
10. List all permits, construction approvals and/or applications (check all that apply and provide
permit numbers or check none if not applicable):
Tie Permit Number
17­71 None
0 UIC
0 NPDES /YC OO 2&2 (,a
PSD
0 NESHAPS
ZVne Permit Number
0 Non -Attainment
C� Ocean Dumping
0 Dredge/Fill Permits
0 RCRA
Other
11. Is this facility located on Native American lands? (check one)
YES o
NO
12. Please list all water treatment additives, including cleaning chemicals, that have the
VC10
ot
13. For NEW water treatment plants, please submit all analyses of source water collected.
I certify that I am familiar with the information contained in the application and that to the best
of my knowledge and belief such information is true, complete, and accurate.
,,oq4Z2-1'A1 zc---. 6J,JZ_t_i2,0",4,F ZY—R—L'-C-70A . PC'P71
1
Printed name of Person Signing Title
Signature of
North Carolina-Geaeml,-5tatute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false statement representation, or
certification in any application, record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the
Environmental Management Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any
recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental
Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $10,000, or by
imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $10,000 or
imprisonment not more than 5 years, or both, for a similar offense.)
Page 2 of 2 Version -08103

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Sludge Management Plan
Mitchell Water Treatment Plant
Guilford County, North Carolina
NPDES Permit NC0081426
Prepared by:
O. Kelly Patton, ORC 1 PC #28886
Submitted by. l
Allan ms, PE
Director, Water Resources Department

The City of Greensboro's Mitchell Water Treatment Plant is a conventional
surface water treatment facility permitted to treat (filter) 24 million gallons of
water per day (MGD). The water produced by the facility meets all applicable
State and Federal standards. Current average daily production at the facility is
16 MGD.
All filter backwash wastewater from the facility flows to a settling basin on the
plant site. Filter backwash flow is intermittent based on plant treatment rate and
raw water quality conditions.
The wastewater settling basin allows for gravity settling of captured solids and is
also equipped with 4 floating decanters which remove fine solids prior to
discharge. As filter backwash flows through the settling basin, solids removed
during the treatment process (consisting primarily of Aluminum Hydroxide
precipitate and the captured turbidity causing materials from the untreated raw
water) settle to the bottom of the basin leaving a clear supernatant which meets
the NPDES permit requirements.
Sludge solids. generated from the treatment process are drawn off of the settling
basin bottom on a daily basis and discharged directly to the city's North
Buffalo/Metro system of wastewater reclamation plants via sanitary sewer. At the
wastewater reclamation plant, sludge solids from the water plant are blended
with other wastewater solids and then thickened, dewatered, and incinerated.