NC0087840_Permit Issuance_20130920

A2 -
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
September 20, 2013
Mayor Luther H. Lewis, Jr.
Town of Middlesex
P. O. Box 69
Middlesex, NC 27557
Subject: Issuance of NPDES Permit
Permit N00087840
Middlesex Well#4 WTP
Nash County
Class I
Dear Mayor Lewis:
Division personnel have reviewed and approved your application for renewal of the
subject permit. Accordingly, we are forwarding the attached NPDES 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 October 15, 2007 (or as subsequently amended).
Summary of Chanizes in Final Permit from Existing Permit
I) Flow limit was removed, reporting reduced to 2/month. Footnote was added for reporting
protocol. Per WTP Strategy, instantaneous flow monitoring required.
2) Fluoride and Total Zinc monitoring was removed. Neither chemical compound is used,
per WTP Greensand Filter Strategy monitoring not required.
3) Total Iron and Total Manganese monitoring was reduced to quarterly. Reported Total
Iron values above WQS. Per WTP Greensand Filter Strategy, quarterly monitoring
required.
1) Turbidity monthly monitoring was added. Monitoring for turbidity is required by US EPA
Region IV.
4) Total Nitrogen and Total Phosphorus semi-annual monitoring was added. Per Neuse
NSW nutrient strategy, semi-annual monitoring for Total Nitrogen and Total Phosphorus
required
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] Fax: [phone]
Internet:: www.ncwaterqualitymm
An Equal OpportuniVAAffirmative Action Employer

S) Total Residual Chlorine limit was corrected and footnote added for measurement
protocol. Outfall incorrectly defined. Discharge is to a "zero' flow stream resulting in
IWC of 100%.
6) Narrative corrections to Supplement to Cover Sheet and address was incorporated in
permit. Technical corrections.
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 decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The
Division may require modification or revocation and reissuance of the permit. This permit does
not affect the legal requirements to obtain other permits which may be required by the Division
of Water Resources or permits required by the Division of Land Resources, the Coastal Area
Management Act or any other federal or local governmental permits that may be required.
If you have any questions concerning this permit, please contact Ron Berry at telephone
number [phone] or at email [e-mail].
Sincerely,
rmas A. Reeder
Attachments
Cc: Raleigh Regional Office/Water Quality Programs
Central Files
NPDES File
Page 2 of 2

Permit NCO087840
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions 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,
Town of Middlesex
is hereby authorized to discharge wastewater and stormwater from a facility located at
Middlesex Water Well No. 4
10921 East Finch Street
Middlesex
Nash County
to receiving waters designated as an unnamed tributary to Turkey Creek in the Neuse River Basin in
accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, and III hereof.
The permit shall become effective ........................... November 1, 2013.
This permit and the authorization to discharge shall expire at midnight on May 31, 2018.
Signed this day ......................................... September 20, 2013.
Tho A. Reeder, DiidtcO
Dlvi on of Water Resources
By Authority of the Environmental Management Commission
Pagel of 3

Permit NC0087840
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.
Town of Middlesex
is hereby authorized to:
1. Continue to operate a Water Treatment Plant with a discharge of treated backwash/rinse
wastewater from Sand Filtration units. This water treatment plant currently has a design potable
flow rate of 0.133 MGD and a maximum, monthly average wastewater discharge of 0.0034
MGD. Water and wastewater treatment consist of:
- Raw well water chlorination system
- Two (2) 6 ft diameter sand filter tanks
- Backwash meter
- Two (2) 8 ft x 36 ft wastewater drying beds
- Tablet dechlorinator
- Potable water air stripper system
This facility is located at the Town of Middlesex Well No. 4, 10921 East Finch Street, Middlesex
in Nash County.
2. Discharge from the said treatment works at the location specified on the attached map into an
unnamed tributary to Turkey Creek, a class C, NSW water in the Neuse River Basin.
Page 2 of 3

Permit NCO087840
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQURRMENTS
a. Beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge treated sand filtration backwash/rinse wastewater from Outfall 001.
Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
LIMITATIONS
MONITORING
REQUIREMENTS
Monthly
Daily
Measurement
Sample
Sample
CHARACTERISTICS
(PARAMETER CODES)
Average
Maximum
Frequency
Type
Location
Flow 1, MGD
2/Month
Instantaneous
Effluent
50050
Total Suspended Solids
(TSS)
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
CO310
Total Residual Chlorine
(TRC)
17 µg/L
2/1\4onth
Grab
Effluent
(50060
pH
Not less than 6.0 S.U. nor
2/Month
Grab
Effluent
(00400)
greater than 9.0 S.U.
Turbidity, NTU
2/Month
Grab
Effluent
00076
Total Iron, mg/L
Quarterly
Grab
Effluent
01045
Total Manganese, µg/L
Quarterly
Grab
Effluent
01055
Total Nitrogen (TN), mg/L
Semi-annual
Grab
Effluent
CO600
Total Phosphorus, mg/L
Semi-annual
Grab
Effluent
c0665
Footnotes:
1. The duration of the discharge must be reported in addition to the total flow.
2. The Division shall consider all effluent TRC values reported below 50 µg/L to be in
compliance with the permit. However, the Permittee shall continue to record and submit
all values reported by a North Carolina certified laboratory (including field certified),
even if these values fall below 50 µg/L.
3. TN = TKN + NO3 N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and
NO3-N + NO2-N are Nitrate and Nitrite Nitrogen respectively.
b. All samples collected must be from a representative discharge event.
c. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 3

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USGS Quad: D26SW Middlesex, NC
Outfall Facili
Latitude: 350 47' 15" N 350 47' 14.2" N
,
Longitude: 78011' 42" W 780 11' 42.2" W
Stream Class: C, NSW
North
Facility Location
Subbasin: 03-04-07 HUC: 03030203
Middlesex Wel114 WTP NC0087840
Receiving Stream: UT to Turkey Creek
Nash County

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES PERMIT NCO087840
Facility Information
Applicant/Facility
Name:
Town of Middlesex/Town of Middlesex Well#4 WTP
Applicant Address:
Town of Middlesex; P.O. Box 69; Middlesex, NC 27557
Facility Address:
10921 East Finch Street; Middlesex, NC 27557
Permitted Flow:
Maximum monthly average 0.0034 MGD
Type of Waste:
Treated backwash wastewater from sand filters
Facility/Permit Status:
Class I /Active; Renewal
County:
Nash County
Miscellaneous
Receiving Stream:
UT to Turkey
Creek
Stream Classification:
C, NSW
Subbasin:
03-04-07
Index No.:
27-86-3-(1)
Drainage Area (mi):
-
HUC:
03020203
Summer 7Q10 (cfs)
-
303(d) Listed?:
No
Winter 7Q 10 (cfs):
-
Regional Office:
Raleigh
30Q2 (cfs):
-
State Grid / USGS
Quad:
D26SW
Middlesex, NC
Average Flow (cfs):
-
Permit Writer:
Ron Berry
IWC (%):
100%*
Date:
Revised 9/17/13
*See Outfall and TRC Correction
BACKGROUND
The Town of Middlesex operates a 0.133 capacity potable water sand filtration treatment plant
for its #4 well site that serves the surrounding community. Currently, Envirolink Inc. is
contracted to provide operating services for his facility. Treated backwash wastewater discharges
to an unnamed tributary to Turkey Creek, a class C, NSW water in the Neuse River Basin.
HISTORY
2008 — Renewal permit issued with no changes from previous permit which applied Greensand
Filter 2004 WTP Strategy guidelines. Permit limited for: Flow, TSS, TRC, and pH.
PROCESS
Well water is chlorinated then introduced to two sand filter units. The filtered water continues
through an air stripper system and into the potable water distribution system. The operator
manually backwashes/rinses each sand filter unit when needed, about once a week. The process
backwash/rinse wastewater passes through a meter, sand filter beds, tablet dechlorinator, and is
discharged into an unnamed tributary to Turkey Creek.
Based on the accumulation of solids in the drying beds, the owner determines when solids
removal is necessary. A contractor is hired to remove and dispose of solids per state regulations.
COMPLIANCE
Since 2008 there were two TSS limit violations but no fines were assessed.
PERMITTING STRATEGY
The 2009 WTP Strategy Revision guidelines for Greensand Filter and BPJ was used to determine
the revised requirements in this permit as follows:
Fact Sheet
NPDES NCO087840
Page 1 of 2

1) Flow limit will be removed, monitoring will be reduced to 2/month. Footnote will be
added.
2) Fluoride and zinc monitoring will be removed. Neither fluoride treatment nor zinc based
inhibitor are present.
3) Iron and manganese monitoring will be reduced to quarterly. Reported Iron values above
WQS.
4) Turbidity 2/month monitoring will be added. EPA requirement.
Neuse River 2013 Nutrient Guidelines
This facility is considered a non -nitrogen discharge and monitoring requirements will be as
defined by current guidelines. Total Nitrogen (TN) and Total Phosphorus semi-annual
monitoring will be add. Total Kjeldahl Nitrogen and Nitrite/Nitrate Nitrogen measurements are
needed to calculate TN.
Outfall and TRC Correction
Previous inspections had noted discrepancies in the outfall location. The intermittent discharge
enters the highway drainage ditch adjacent to the facility, flows through the highway ditch, under
the highway through a culvert, through another ditch, and then into an unnamed tributary to
Turkey Creek. Based on USGS stream stats program, the receiving stream is a "zero" flow
stream resulting in an IWC=100%. It was suggested in the file documentation the volume of
discharge never makes it to the unnamed tributary but is dispersed through infiltration in the
ditch system. The corrected outfall lat/log (entry point into the ditch) was determined and
corrected in BIMS and in this permit.
The TRC limit will be corrected in this permit based on the new IWC. A footnote will be added
to define TRC reporting protocol and compliance.
SUMMARY OF PROPOSED CHANGES
In keeping with Division strategies the following will be incorporated into the permit:
• Flow limit will be removed, monitoring will be reduced to 2/month, footnote added for
reporting duration of discharge.
• TRC limit will be corrected and footnote will be added for measurement protocol.
• Fluoride and zinc monitoring will be removed.
• Iron and manganese monitoring will be reduced to quarterly.
• Turbidity 2/month monitoring will be added.
• TN and TP semi-annual monitoring will be added.
• Supplement to Permit Cover Sheet narrative and facility address will be updated.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: July 31, 2013
Permit Scheduled to Issue: September 2013
NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please
contact Ron B y at (91 807-6396 or email ron.berry �jde j v.
NAME: DATE: I I
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NCO087840
Page 2 of 2

MIROWc1
AUG 2 9 2013
Rocky Mount
TELEGRAM
FNCDENR/DIV OF WATER QUALITY
ATTN: KEN PICKLE
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
PUBLISHER'S AFFIDAVIT
FoD
CopyLlne: sNorthCarolinaEnvironmentalMa
Lines: 40
Total Price: $75.20
Account: 3109976 AD ID: 8205435
AD ID: 8205435
NORTH CAROLINA -
NASH COUNTY:
Susan Steel affirms that she is clerk of the Rocky Mount Telegram, a newspaper published daily at Rocky Mount, Nash
County, North Carolina, and that the advertisement, a true copy of which is hereto attached, entitled
PublicNoticeNorthCarolinaEnvironmentalMa was published in said the Rocky Mount Telegram on the following dates:
Thursday, August 1, 2013 Page: D1
and that the said newspaper in which such notice,
paper, document or legal advertisement was published,
was at the time of each and every publication, a
newspaper meeting all of the requirements and
qualifications of Chapter 1, Section 597 of the General
Statutes of North Carolina and was a qualified
newspaper within the meaning of Chapter 1, Section
597 of the.General Statutes of North Carolina.
Affirmed and subscribed before me this 01 day
of August 2013
(Notary Public Signature )
(Notary Public Printed Name)
I v
t l.' C..©,
Mycommission expires /� 9'jj NOTARY
PUBLIC
Public Notice
North Carolina Environmental Man-
agement CommissimINPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NPDES
Wastewater Permit
The North Carolina Environmental
Management Commission proposes to
issue a NPDES wastewater discharge
uennit to the oer:on(s) listed below.
may
bel
public in
and/or
at the a
at 512 N. Salisbury Street. Raleigh, NC
to review information on file. Addi.
tional information on NPDE5 permits
and this notice may be found on our
website:
http://portal.ncdenr orgtweb/wq/sop/p
slnpcieshalendar, or by calling (919)
8074390. The Town of Middlesex
requested renewal of permit
NCW87940 for its Well#4 WTP in Nash
County, this permitted discharge is for
treated backwash/rinse wastewater to
an unnamed tributary to Turkey Creek,
Neuse River Basin.
08/01/2013

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Town of Middlesex Solids Handling Plan
NPDES Permit # NCO087840
Well #4
Presently the Town of Middlesex Filters are backwashed on a weekly basis. The backwash
effluent is discharged to a sand filter drying bed at Well Lot #4. When the Operator in
Responsible Charge concludes there is enough material to dispose of, a private sludge
contractor will be retained to properly dispose of the solids in accordance with all State and
Federal Regulations.