NC0020567_Permit (Issuance)_19990524

WDES DOCUMENT SCAMMIMS COVER SHEET
NPDES Permit: NC0020567
Elkin WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Correspondence
Re:
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date: May 24, 1999
This document is prir►ted oa reuse paper-ignore arty
cornterit on the resrerse side

-
State of North Carolina
Department of Environment •
and Natural Resources f
Division of Water Quality
James B. Hunt, Jr., Governor NCDENR
Wayne McDevitt, Secretary Nown-i CAROLINA DEPARTMENT OF
Kerr T. Stevens, Director ENVIRONMENT AND NATURAL RESOURCES
May 24, 199.9 .
Mr. Grant Goings
Town of Elkin
P.O..Box 857
Elkin, North Carolina 28621
Subject: Issuance of NPDES Permit NCO020567
Elkin WWTP
Surry County
Dear Mr. Goings:
The Division received your application for a wastewater discharge permit on November 30,
1998. Division personnel have reviewed and approved your application. Accordingly, we are
forwarding the attached 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 December 6, 1983, and 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),4ays 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, Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such
demand is made, this decision shall be final and binding.
The following changes, previously sent to you in the draft version of this permit, are now
included in the final permit:
➢ Monitoring requirements for Total Nitrogen and Total Phosphorus have been increased to
weekly, based on the need for additional nutrient data prior to the development of a
nutrient management strategy in the Yadkin-Pee Dee River Basin (YPDRB). Nutrients are a
concern in the upper subbasins of the YPDRB. During the next permitting cycle the
Division will determine whether or not a Nutrient-Sensitive Waters designation is
appropriate for all or part of the YPDRB. Nutrient monitoring has therefore been increased
for your facility and numerous others in the upper subbasins of the YPDRB.
➢ The Whole Effluent Toxicity test has been changed from Acute to Chronic at 0.87% to
reflect the Division's revised policy for such tests (see Part I. A. (2.)).
➢ The permit expiration date has been changed to January 31, 2004, for consistency with the
Division's basinwide permitting schedule.
➢ The requirements for BOD and TSS removal have been changed from 65% to 85%. This
change is required by 40 CFR 133.102 due to the change from trickling filters to aeration
tanks as the main treatment components. Influent and effluent monitoring are required for
BOD and TSS.
P.O.Box 29535,Raleigh,North Carolina 27626-0535 Telephone[phone] FAX[phone]
An Equal Opportunity Affirmative Action Employer 50%recycled /10%post-consumer paper

J
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 Quality or permits required by the Division of Land Resources, the
Coastal Area Management Act or any other Federal or Local governmental permit that may be
required.
If you have any questions concerning this permit, please contact Charles Weaver at telephone
number [phone], extension 511.
Sincerely,
Original Signer By
David A. Goodrich
Kerr T. Stevens
cc: Central Files
Winston-Salem Regional Office/Water Quality Section
Mr. Roosevelt Childress, EPA
NPDES Unit
Point Source Compliance Enforcement Unit
Aquatic Toxicolo.,,sv Unit

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 provisions of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Water Quality Commission, and the Federal
Water Pollution Control Act, as amended,
Town of Elkin
is hereby authorized to discharge wastewater from a facility located at
Town of Elkin Wastewater Treatment Plant
off of Marion Lane
Elkin
Surry County
to receiving waters designated as the Yadkin River in the Yadkin-Pee Dee River Basin
in accordance with the discharge limitations,monitoring requirements, and other conditions set forth in Parts
I, II, III, and IV hereof.
This permit shall become effective July 1, 1999.
This permit and the authorization to discharge shall expire at midnight on January 31, 2004.
Signed this day May 24, 1999.
- - Original Signed By -
David A Goo-dr-ch
Kerr T. Stevens., Director
Division of Water Quality
By the Authority of the Environmental Management Commission

Permit No.NC0020567
SUPPLEMENT TO PERMIT COVER SHEET
Town of Elkin
is hereby authorized to:
1. Continue to operate an ekisting 1.8 MGD wastewater treatment plant consisting of
mechanical bar screen, grit chamber, influent flume, continuous recording'flow
measurement, primary clarifiers, trickling filter, aeration basin, dual secondary
clarifiers, chlorination with contact chamber, dechlorination, automatic sampler,
aerobic digester, sludge holding tanks, and sludge drying beds located at the Town of
Elkin Wastewater Treatment Plant, off Marion Lane, Elkin, Surry County, and
2. Discharge wastewater from said treatment works at the location specified on 'the
attached map into the Yadkin River which is classified C waters in the Yadkin-Pee
Dee River Basin.

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as Elkin[•
9081 PS�I i
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\ t•. JT�won '`�C��"Sew C\�
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sville
B� T_ 4 —• �. die.. . Y.?
of ..�• ELKIN WWTP
�' NC0020567-001
RECEIVING STREAM: Yadkin River
y cem, 1 Stream Classification: C
`:• '� u l USGS Quad. No. C15NE
��—
USG S Quad. Name : ELKIN SOUTH
County: SurrY
Arlington1�\
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fit ll _
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Uidtide:36°14'51" N C 0 0 2 0 5 6 7 Facihty
Long,Wde:80"4955"
Quad# c15NE Location
Receiving Stream: Yaffim River
,W-A
stream cis c
Elkin WVVTP
Subbann 30702 Northl
SCALE 1 i24000

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0020567
During the period beginning upon the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial
number 001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement, Sample amp e,
Average Average Maximum Frequency Type Location'
Flow on i—nu ous ecor ing I or
BOD, 5 day, 20°C mg mg Daily omposi e
Total Suspended Residue2 g45.0 mg Daily omposi e
3 as 3/Week omposi e
Fecal o i orm (geometric mean m m ai y ra
pH ai y ra
E—
Total Residualonne µg ai y ra
empera ure ai y ra
otal Nitrogen 2+ NO3+ ee y omposi e
Total Posp orus Weekly C`omposi e
Chronic Toxicity ua er y omposi e
Notes:
1 Sample locations: E - Effluent, I — Influent.
2 The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85%
removal).
3 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
Chronic Toxicity (Ceriodaphnia) P/F at 0.87%. March, June, September, and December, See Part I, Special Condition A(2).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Part I Permit No.NCO020567
A(2). CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised November 1995, or subsequent
versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant
mortality is 0.87% (defined as treatment two in the procedure document). The permit holder shall perform
quarterly monitoring using this procedure to establish compliance with the permit condition. The tests will
be performed during the months of March,June, September, and December. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1)for the month in which it was performed,using the parameter code TGP3B.
Additionally, DWQ Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of Water Quality
4401 Reedy Creek Road
Raleigh,North Carolina 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of
the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the
waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required,the permittee will complete the information located at the top of the aquatic toxicity (AT)test form
indicating the facility name,permit number, pipe number, county, and the month/year of the report with the
notation of"No Flow" in the comment.area of the form. The report shall be submitted to the
Environmental Sciences Branch at the address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring
will begin immediately until such time that a single test is passed. Upon passing,this monthly test
requirement will revert to quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly
test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North-Carolina Division of
Water Quality indicate potential impacts to the receiving stream,this permit may be re-opened-and modified
to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival,minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the last
day of the month following the month of the initial monitoring.
QCL P/F Version 9196

PUBLIC NOTICE
STATE OF NORTH
CAROLINA
ENVIRONMENTAL
MANAGEMENT
POST OFFICE BION
OX29535
NORTH CAROLINA (;� RALEIGH,NORTH
SURRY COUNTY CAROLINA 27626-0535
ICATION OF
NTOITO I
ENT ISSUE A
AFFIDAVIT OF PUBLICATION STATE NPDES PERMIT
On the basis of through
staff review and application
Before the undersigned, a Notary Public of said County and State, duly of Article 21 of Chapter .
commissioned, qualified an authorized y
d d hd b law to administer oaths, Nort General Statutes of
q 92-500 Carolina, lawful
o
c Law
personally appeared George W. Summerlin an
standards and regulations,
who being first duly sworn, deposes and says: that he (she) is the North Carolina
E n v i r o n m e n t a l
Pahl i ahPr (Publisher or other officer or employee Management Commission
authorized to make affidavit) of MOUNT AIRY NEWSPAPERS, INC., Proposes to issue a permit
to discharge to the persons
engaged in the publication of a newspaper known as MOUNT AIRY listed below effective
4112/99 and subject to spe-
NEWS, published, issued, and entered as second class mail in the city of cial conditions.
Mount Airy in said County and State; that he (she) is authorized to make Persons wishing to com-
this affidavit and swom statement; that the notice or other legal ment upon or object to the
advertisement, a true copy of which is attached hereto, was published in proposed determinations
are invited to submit same
in writing to the above
MOUNT AIRY NEWS on the following dates: address no later than
3/29/99. All comments
February 24 , 1999 received prior to that data
will be considered in the
formulation of final determi-
nations regarding the pro-
posed permit. A public
meeting may be held
where the Directory of the
Division of Environmental
and that the said newspaper in which such notice, paper, document or Man degree of Public sn9elr-
legal advertisement was published was, at the time of each and every est in a Proposed permit,
such publication, a newspaper meeting all of the requirements and A copy of the draft permit is
qualifications of Section 1-597 of the General Statutes of North Carolina available by writing or call-
q ing the Division of
and was a qualified newspaper within the meaning of Section 1-597 of E n v I r o n in e n t a I
Management, P. O. Box
the General Statutes of North Carolina. 29535, Raleigh, North
Carolina 27626-0535,
[phone].
This 26 day of February 19 99 The application and other
information may be
inspected at these loca-
C tions duringnormal office
�,1�—Lc��e—�C- [,� ��`��u-•'I'L��"'`-2 hours. Copis of the infor-
' Signature of person making affidavit mation on file are available
upon request and payment
of the cost of reproduction.
Swom to and subscribed before me, this 26 day of All such comments or
requests regarding a pro.
Posed permit should make
February 19 99 reference to the NPDES
permit number listed
� below.
2/17/99
A.Preston Howard Jr.,
Notary Public RE.. Director Division of
Environmental
My Commission expires: February 28 , 2002 Management
Public notice of intent to
%J1111111flot '�• issue a State NPDES per-
MA
y mit to the following:
,�����.�,.••"•••'••., �'^•.% 1.NPDES No.NC0020567.
V;'•d OTA Elkin, NC
ofElkin,2 6211 has
applied for a Permit 1+h'Camm..Exp. al for a facility locatedfed in in
the Town of Elkin
Wastewater Treatment
% G p -
C� Plant, off Marion Lane,
)`
'9 U$__ Elkin in Surry County.The
� facility currently discharges
n 1.6 MGD of treated domes-
tic wastewater from one
-• ouffall into the Yadkin River,
a Class C stream in the
Yadkin-Pee Dee P,,o

DENR/DWQ
' FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO020567
Facility Information
FacilityName: own o in
Permitted ow(MGD): 1.8 ounty: Surry
aci rty ass: Regional ice: WSKU
Facility/PermitStatus: Renewal ('/.) U S(jS I opo Quad:
Stream aracteristics
ReceivingStream: Yadkin River
Stream Classification: C 12-(53) (7.) Drainage Area (mi ): 878
u asm: Summer c s
listed stream. No inter c s
upport atmg reatene c s
oAverage Flow c s :
CHANGES TO PREVIOUS PERMIT
Parameters Affected ProposedChanges Basis for change(s)
Expiration Date Should bePer 30701 schedule
aci rty description Supplement page A I C issued 2/95
WETtest Change to QCL Per memo
Nutrient monitoring Increase to weekly Yadkin nutrient memo
Effluent Page at 1.0 MGD Eliminatedconstructe
Summary
There are a few minor changes in this permit since last renewal. They are noted in the table above.
Two important changes pertaining to this permit are: the inactivation of the pretreatment program
and participation in the Yadkin-Pee Dee Basin Association..
The Oct. 1994 WLA completed by M. Wilson gave secondary limits for flows at 1.0 and 1.8 MGD
for both summer and winter, which seem correct given the size of the receiving stream.
Construction for 1.8 MGD was completed and limits at 1.8 MGD went into effect February 1998,
therefore the 1.0 MGD effluent page is no longer necessary.
Review of DMR data from January 1997 to November 1998 indicates the facility has been in
compliance during the review period and performing very well. DMR data also show that the
facility is well below the permit limits and the effluent is not exhibiting any toxicity.
For the following parameters listed in the table:
• Conventional parameters are reported by the permittee in the renewal application,
• Toxicity is from ESB's 12/15/98 Data Summary from March 1996 to October 1998,
PARAMETER DMR RESULTS AVERAGE ACTION
ow l 0.961 off
BOD5 (mg/1) 1.3 to 8.0 6.1 None
TSS (mg/1) 4.4 to 10.2 6.8 None
Ammonia (mg/1) 1.0 to 1.0 1.0 None
DO (mg/1) 6.2 to 11.9 9.1 None
Fecal Highest was 33 N/A None
TKN (mg/1) 1.1 to 5.3 2.5 None
TN (mg/1) 0.34 to 4.3 2.6 None
TP (mg/1) 0.7 to 11.0 2.4 None
Toxicity 11 passes, 0 fails None
TRC (mg/1) 0.01 to 0.10 0.1 None
Version.February 5, 1999 Page l

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0020567
Due to participation in the Yadkin-Pee Dee Basin Association, instream data requirements were
waived for this facility starting in June 1998. Prior to that time, no data was to be found in the
DMR files.
Region:
Please comment on the applicability of increasing the monthly removal requirement for BODS
and TSS from 65% to 85%, to be consistent with minimum treatment requirements per 40 CFR
133.102. This change may be warranted due to the change from trickling filters to aeration
tanks as the primary treatment components. In addition, should this facility be monitoring
Influent and Effluent for compliance?
Please review the TRC data and note that it is consistently 10 ug#17. The facility maybe
forgetting to insert the "<"sign in the DMR data sheets. If this is the case,please inform them
to correct their monitoring.
Copies of the following are attached to provide further information on the permit development:
• Existing permit effluent sheets with changes noted (existing facilities only)
• Draft Permit
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 3/10/99
Permit Scheduled to Issue: 4/26/99
State Contact
If you have any questions on any of the above information or on the attached permit, please
contact Steve Pellei at [phone], extension 516.
NPDES Recommendation by: I Z- S '99
Regional Office Comments i�e;me�aC re��r� reyner�L� r F- :5
p< r . are net upplicct61e Cr ilec_e 52ru or, the �?evfcna !fi-f"S.
j
we bftSr cr�r�ll3t�U-nce C �V L�I)Crh+ 'r Cr nct t; �G6ciW—y meets the rt, mit
i,m , t l �m. e �?e ic.t� u�ni tr_I I 3} � Th � �� � neJ ,i, ie ctn :�1�rc>r�°went
d�'e tz- n� -plr_r.1���� i,cot^„ e of ret�c�c�l re �;,, C,��eilts iF r��e ��Crmrt 1„ti0 , �
i �Jei(IQ /YPL. IYIeFQI'Il , ti�" i '� c /9a'/ t. 'l�nC^l ' C"Y1��JIiC111�e f1v1 rtlrtf1 l
au9, l -; 4 I er'rh'eri 1, 1 C�"i,r1'f � LYQ 1/p(I �fYC1 �� 't jf> by ;;/ 41 Eri�"1
the CO-C k i � 11�SrY ;,Xi�t<, i(�t0 t�1P 'Q:� K� � Vr. Iv FI�J�:c1t; fY o0� tr't
Regional Recommendation by:
Reviewed By:
Date:
Regional Supervisor: ti�__.�,,__ _ C, { t
ate
NPDES Unit: Z
Fersion: February 5, 1999 Page 1
�i 1 .44 -i�.�. ,.� ��,�,rr
L �

A. ().EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO020567
During the period beginning upon expansion to 1.8 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall(s)
serial number 001. Such discharges shall be limited and monitored by the pemuttee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Measurement Sample *Sample
Monthly Avg. Weekly Avg. Deily Max Frequency Tvpe Location
Flow 1 .8 MCA Continuous Recording I or E
BOD, 5 Day, 20 °C" 30.0 mg/I 45.0 mg/I Daily Composite E
Total Suspended Residue" 30.0 mg/I 45.0 mg/I Daily Composite E
NH3 as N 3/Week Composite E
Fecal Coliform (geometric mean) 200.0 /100 ml 400.0 /100 ml Daily Grab E
Total Residual Chlorine 28.0 µg/I Daily Grab E
Temperature Daily Grab E
Total Nitrogen (NO2 + NO3 + TKN) Monthly Composite E
Total Phosphorus Monthly Composite E
Acute Toxicity' Quarterly Composite E
*Sample locations: E-Effluent,I- Influent
**The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 35 % of the respective influent value(65
% removal).
*** Acute Toxicity (Daphnid 48 hr)LC50 87%; March,June, September and December; See Part III, Condition F.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A.,EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL Permit No. NCO020567
During the period beginning upon'expeflsiemto 1.8 AAGD 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 Weekly Daily Measurement Sample Sample
Average Average Maximum Fre uenc Type Location'
Flow 1.8 MGD Continuous Recording I or E
BOD, 5-Day, 20°C2 30.0 mg/I 45.0 mg/I Daily Composite E
Total Suspended Residue2 30.0 mg/I 45.0 mg/I Daily Composite E
NH3asN 3/Week Composite E
Fecal Coliform (geometric mean 200/ 100 ml 400/ 100 ml Daily Grab E
Total Residual Chlorine 28 /I DailV Grab E
Temperature Daily Grab E
Total Nitrogen (NO2+ NO3+TKN) wu L Monthty Composite E
Total Phosphorus u c ivf —composite E
AautuToxicity3 Quarterly Composite E
Footnotes:
I Sample locations: E - Effluent; I - Influent.
2 The monthly average effluent BOD 5 and Total Suspended Residue concentrations shall not exceed FM. of the respective influent value (651% removal).
3 `^ '^T^ ^^�'h Q' '`gym-r�" ; March,June, September& December(sec-Part-Ili;-Condition-F):
l�'iQuu, TC�iCf'"� CO;.F-R-VJ baPI-(,v iA� f♦/F aT O.i5�7o Ccc f4rc � , (T. Lino•. A('').
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored at the effluent via
daily grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

LONG TERM MONITORING PLAN REQUEST FORM
FACILITY: Elkin WWTP
NPDES NO.: NCO020567
EXPIRATION DATE: 5/31199
REGION: WSRO
P&E REQUESTO Steve Pellei
PRETREATMENT CONTACT: :-
DATE OF REQUEST: 115/99
INDICATE THE STATUS OF PRETREATMENT PROGRAM:
1) THE FACILITY HAS NO SIU'S AND SHOULD NOT HAVE PRETREATMENT LANGUAGE.
2) THE FACILITY HAS OR IS DEVELOPING A PREATREATMENT PROGRAM.
3) ADDITIONAL CONDITIONS REGARDING THE PRETREATMENT PROGRAM ATTACHED.
PERMITTED FLOW: 1.0 MGD (1.8 MGD after expansion)
SIU contributions ?
• INDUSTRIAL
• DOMESTIC 100.0% (per previous WLA)
NOTE:
Currently this facility does not monitor for metals/toxics, however they are listed as having
a pretreatment program. Request pretreatment's comments on whether monitoring for any
parameters should be added as part of the permit requirements? If any data exist for this facility
please submit.
i t
/
1