NC0021474_WASTELOAD ALLOCATION_19860627

NPDES DOCUMENT SCANNINS COVER :GNEET
NPDES Permit: NC0021474
Mebane WWTP
Document Type: Permit Issuance
asteload Allocatio
Authorization to Construct (AtC)
Permit Modification
Engineering Alternatives Analysis
201 Facilities Plan
Instream Assessment (67B)
Correspondence re: draft permit
Permit History Date Range:
Document Date: une 27 198
This document is printed oa reuse paper-i@'mmom-e 81my
commte:mt on time reverse aide

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DIVISION OF ENVIRONMENTAL MANAGEMENT
June 27, 1986
M E M O R A N D U M
TO: Arthur Mouberry
THROUGH: Meg Kerr m
FROM: David Vogt F��
SUBJECT: Limits for the Town of Mebane
Attached are the proposed limits for Mebane if their discharge is
moved to Back Creek. Limits for the oxygen-consuming waste were obtained
by using the Level-B Model . Limits for the metals were obtained by doing
a mass balance at the point of discharge.
The reason that the BOD limit for Back Creek is more stringent than
for Moadams Creek is that the slope for Back Creek is only 6.4 ft/mile,
while the slope for Moadams Creek is 25.0 ft/mile. When using the Level-B
Model , the stream slope is an important factor since it determines the
velocity, BOD decay rate, and importantly, the reaeration rate.
Please note that these limits are not being presented for approval .
They are in response to Mebane' s request (in a letter sent to you on
4-11-86) asking us to evaluate several alternatives to limits assigned
for their existing design flow and point of discharge.
JDV:mIt
Attachments

Request No . �
--------------------- WASTELOAD ALLOCATION APPROVAL FORM -----------------------
Facility Name : TOWN OF MEDANE
Type of Waste : COMBINED
Status : EXlSTINR
Receiving Stream : BACK CREEK
Stream Class : C
SuUbasin : 050602
County : ALAMANCE Drainage Area ( sq mi ) : 73. 1
Regional Office : WINSTON-3ALEM 7010 (cfs ) : 0.30
Rcquestpr ; A. MOUBERRY Winter 7010 (cfs> : 0 .51
Date of Request : 6-26-86 3002 (cfs) ;
Quad Average Flow ( cfs) 68.0
------------------------- RECOMMENDED EFFLUENT LIMITS -------------------------
; SUMMER WINTER SUMMER WINTER
Wasteflow (mgd ) : 1 . 2 1 .2 2 .0 2.0
5-Day DOD (mg/1 ) : 8 16 8 16
Ammonia Nitrogen (mg/1 ) : R 4 2 4
Dissolved Oxygen (mg/ 1 ) : 5 5 5 5
TSJ (mg/1 ) ; 30 30 3" 30
Fecal ColifpIm ( K/100ml ) : 1000 1000 1000 1000
pH (3U) . 6-9 6-9 6-9 6-9
_______________________________________________________________________________
---------------------------------- COMMENTS -----------------------------------
THESE ARE THE PROPOSED LIMITS IF MEBANE ' S WASTE IS DISCHARGED
INTO BACK CREEK RIGHT BELOW ITS CONFLUENCE WITH MOADAMS CREEK.
_______________________________________________________________________________
Recommended by ______________________ Date__________
Reviewed by :
Tech . Support Superviscr______________________ Date__________
Regional Supervisor______________________
Permits & Engineering....I................. Date__________

Metal limits if Mebane' s discharge is into Back Creek :
1 .2 MGD 2.0 MGD
Summer Winter Summer Winter
Cadmium 2.5 ug/l 2.6 ug/l 2.3 ug/1 2.3 ug/1
Chromium 63.4 ug/1 63.7 ug/l 58.1 ug/1 58.2 ug/l
Copper 19.0 ug/l 19.1 ug/l 17.4 ug/1 17.5 ug/l
Mercury 0.3 ug/l 0.3 ug/l 0.2 ug/1 0.2 ug/l
Zinc 63.4 ug/l 63.7 ug/l 58.1 ug/1 58.2 ug/1

State of North Carolina
Department o_ f Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor R. Paul Wilms
S. Thomas Rhodes, Secretary Director
June 26, 1986
Ms. Elaine J. Hicks
Acting Town Manager
106 East Washington Street
Mebane, North Carolina 27302
SUBJECT: NPDES Permit NCO021474
Town of Mebane
Alamance County
Dear Ms Hicks:
Based on your letter of May 29, 1986, and the fact that the Division still has
not received the flow data for Back Creek, the July 31, 1986, response date will not
be required to be met. Once the data is available, and the wasteloads for the 1.2
and 2.0 mgd flow rates have been established, a new response date will be set.
If you have any questions on this matter, please let me know.
Sincerely,
Arthur Mouberry, P.E.
Supervisor, Permits S Engineering
cc: Winston—Salem Region Office
David Vogt
AM/gwt
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal opportunity Affirmative Action Employer

C.Brooks Gardner. "Iofon of Mebane Elaine J.Hicks
Mayne W NL►L 7ouw CWk/Fiwnn O/lo,
CHARTERED IN 1881 Bernice 0.Wilson
71.Cal/erlor
Mebane, N. C. 27302 Grady Caviness
Chwfofr IRe
Timothy Bradley
Richard L.French,Toum Manage. Chu/Fin Dept
Ca...il: Delmar Lankford
Donald B.Laws Nblic Work,Director
William R.Hupman,Jr. Paul Young
James A.Jobe,Jr. Cbu/b,pgi~
Everette Pender Dennis Hodge
Jesse Rice May 29, 1986 W.rptrutr.e.t
&.Orku.de.t
Mr. Arthur Mouberry, P.E. , Supervisor
Permits and Engineering ,
N. C. Department of Natural Resources
and Community Environmental
Division Office
Environmental Management N198t
Post Office Box 27687Raleigh, NC 27611-7687MAY so
Subject: NPDES Permit N. C. 0021474
Mebane, NC PERMITS & ENGINEERING
Dear Mr. Mouberry:
We are in receipt of your May 13, 1986 letter responding to previous
questions relating to the subject permit. We have a major concern over
the response time of July 31, 1986 which you indicated in your letter.
The Town of Mebane is evaluating. the costs to install a sewer line to Back
Creek. Should your office receive information back from the USGS in the
six week schedule (by June 30, 1986) , then you perform your own evaluation
based on that information over a two week period (by July 15, 1986) ; we
would only have two weeks in which to evaluate all alternatives available
to us and prepare a response. As the time between now and.mid July is
unavailable for our evaluation of the Back Creek Alternative, we feel the
period should be extended by a minimum of 90 days.
Your consideration of the matter is most appreciated.
Sincerely,
TOWN OF MEBANE
Elaine J. Hicks, Acting Town Manager
cc: Dennis Hodge
Charles Bateman
Alley, Williams, Carmen, & King, Inc.
Steve Mauney, Regional Office

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C.Brooks Gardner,Mayor ofw n o ,.?ffl Pban e Elaine J.Hicks
Toux Ckr4/Finance O/f,cre
CHARTERED 1N 1881 Bernice 0.Wilson
Tar Collector
Mebane, N. C. 27302 Grady Caviness
ChiefofPaice
Timothy Bradley
Richard L.French,Tov Manager Cbi f F"Dept
Council: Delmar Lankford
y Donald B.Laws NbIx Wo kr Dircaor
William R.Hupman,Jr. Paul Young
James A.Jobe,Jr. Chisff.,peaio.r
Everette Pender
Jesse Rice April 11, 1986 DeO°"Hodge
Werutre.h.e.t
Mr. Arthur Mouberry, Supervisor
Permits and Engineering
N. C. Department of Natural Resources
and Community Development 8
Post Office Box 27687 6
Raleigh, North Carolina 27611 APR 14 1986
Subject: Town of Mebane PERMITS & ENGINEERING
Proposed NPDES Permit No. 21474
Dear Mr. Mouberry:
In our March 24, 1986 letter to you, we requested a time extension to fully
evaluate several alternatives relating to the proposed permit. In order for
us to determine the feasibility of some of these alternatives, we need responses
from your office to several questions. We therefore request that your office
provide us a response(s) to the following items:
1. Should the Town of Mebane change its discharge point from its present
location on Moadams Creek downstream to Back Creek (near the confluence
i of Moadams Creek with Back Creek) , what would our effluent limitations
be at that point for flows of 1.2 MGD and 2.0 MDG?
2. It is our understanding that Moadams Creek has been determined to have a
7Q10 low flow of zero at our discharge point. Due to this condition, the
proposed permit contains certain metal limits which will be difficult for
Nam . our plant to comply with. In view of this, please advise us if the Town
could add ground water upstream from our discharge point to eliminate the
7Q10 zero flow condition. Also, if permissible, what volume of water
addition would be required?
3. Should the Town decide to enlarge our treatment plant at the present
location, what discharge limits would result for a design flow of 2.0 MGD?
.� Should Item 2 (above) be acceptable, please take this into account when
determining the discharge limits for 2.0 MGD.

Your timely response to these items should enable us to complete our study
within the requested time. If you have any questions relating to our
request, please do not hesitate to contact Dennis Hodge at 563-6141.
Sincerely,
I�Q• VVV
Elaine J. Hicks, Acting Town Manager
cc: Dennis Hodge
Alley, Williams, Carmen, & King, Inc.
Charles Bateman
:. Steve Mauney, Winston-Salem
:y
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MOADAMS CREEK CPF 02
QUAL-II model of MoAdams Creek from Mebane to below Latham Lake.
Water quality data collected in June, July 1977 and October 1978.
Allocation model was developed with the 1978 data since treatment plant
performance was more representative at this time.
Summer Winter
Flow 1 .2 mgd 1 .2 mgd
BOD5 11 mg/l 18 mg/1
NH3 4 mg/l 10 mg/l
DO 6 mg/1 6 mg/l
TSS 30 mg/l 30 mg/l
Fecal Coliform 1000/100 ml 1000/100 ml
pH 6-8.5 SU 6-8.5 SU

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NPOES WASTE LOAD ALLOCATION Engineer I Date R c.
Facility Name: own o 1- /yie4mne Date /o -15'45-�.
Existing
Proposed O Permit No. : IVCoo2/y7S( Pipe No. : oo ' I County: Ala,nanc2
Design Capacity (MGD) : �• Z Industrial (% of Flow) : 3 a- Sd /o Domestic ( % of Flow) : o " /a /e
Receiving Stream: 10c)n Jo m s Geek Class: C Sub-Basin: 03 ' 0 6 -•D 2-
S F
Reference U C zc SGS Quad: (Please attach) Requestor: LiS4 �rQ2c4 Regional. Office
(Guideline limitations, if applicable, are to be listed on the back of this form. )
Design Temp.: 01S,'C. Drainage Area (mi2) Avg. Streamflow (cfs) : 40
'7Q10- (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Location of D.O. minimum (miles below outfall) : Slope (fpm) 2 f. o
.Velocity (fps) : 0 . 2( 3 K1 (base o, per day) : D . (o o K2 (base e, Der day) :
-8Y
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Effluent Monthly Effluent "Dnthly
Characteristics Average Comments Characteristics ].verage Comments
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Irma On
ed By: Reviewed By: Date:

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% For AppWriate .DisebarAers, list Complete Guideline limitations Below
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iezuest No . 2624
------------ WASTEL LOAD ALLOCATION APPROVAL FORM --.__.._._._._...___---_.-.____.._.._
I`acility Name TOWN OF MEBANE
T` pe Of Waste : INDUSTRIAL 3 DOMESTIC
Receiving Stream : MOADAMS CREEK
Stream Class C 'RECEIVED
Subbasin : 03-06-02
Count j ALAMANCE N.C. Dept. NRCD '
Regional Office WINSTON-SALEM IAN A 1988
Reauestor : L . CREECH
Drainage Area (so mi ) : 1 . 1 Divlsioci .)f
7010 ( cf s ) : 0 Environmcntal MInwipment
Winter 7010 ( c f s ) : 0 Winston-Salem Red.Offlee.
3002 ( cfs ) >
- -- ----------------------- - RECOMMENDED EFFLUENT LIMITS - ------------------ -------------- -
S 'y
Wastefl.ow ( mod) : 1. . 2 1. 2
5-Day ;+OD ( mg/1 ) 11 15
Ammonia Nitrogen (mg/1 ) : 4 9
Dissolved Oxumen 05/1 ) : 6 6
PH ( SU ) 6-9 6-9
Fecal Coliform ( /100ml ) : 1000 1000
TSS ( mg/1 ) : 30 30
METALS-SEE ATTACHED
SHEET .
---- -- ------ ----------------- COMMENTS
THIS IS A REVISED WL_A THAT INCLUDES WINTER LIMITS
AND LIMITS ON SEVERAL METALS THAT HAVE BEEN FOUND
IN HIGH CONCENTRATIONS IN MEPANE' S EFFLUENT . NOTE
THAT EVEN THOUGH MEFANE HAS A SMALL POPULATION ( APPROX .
3000 PEOPL..E ) r THERE IS A CONGREGATION OF INDUSTRY
DISCHARGING INTO THE WWTP . MOST OF THESE DISCHARGERS
ARE CLASSIFIED IN THE METAL-FINISHERS GROUP ,
------- -------------------------------------- - ---------- -- ------- - ------- -- ---..___ --- ------ -
FACILITY IS : PROPOSED ( ) EXISTING ( ✓) NEW ( )
1IMITS ARE : REVISION ( ✓ ) CONFIRMATION ( ) OF THOSE PREVIOUSLY ISSUED
FiF..CDMMENLiE'D BY : _ o ATE :
REVIEWED BY :
SUPERVISORY TECH . SUPPORT : .--- � ���--------DATE : _.� ✓�� _.
REGIONAL. SUPERVISOR 1'E .�I/PERMITS MANAGER lit;""�n+ --- DATE : ... LfI�°.__

/ NPDES WASTE LOAD ALLOCATION
<m' lni/)n (0 � l1/Ar o bu�� /O -
Facility dame: Date:
E
Existing Permit No. : Pipe No. : ��� County: r�/ai�1 PO
Proposed Q
Design Capacity (MGD) : �+ a Industrial (% of Flow) : Domestic (% of Flow) :
Receiving Stream: /rin/'Anry 1S cee4 Class: e- Sub-Basin: PPE— 0
w5 /2o
� Re
G��lYZ / t'OIJ P Regional Office
_`erence l'SGS Quad: .(Please attach) ReGuestor: g .
(Guideline limitations, if applicaae, are to be listed on the back of this form.)
Design Temp. : Drainage Area: / Avg. Streamflow:
7Q10: n,o /4n Winter 7Q10: 0,o u 30Q2:
a+ Slope:
d Location of D.O.minimum (miles below outfall) : P
E velocity (fps) : Kl (base e, per day, 2000 : K2 (base e, per day, 200C) :
y1. Effluent Monthi. ! ! ( Effluent Monthly
d j Characteristics Average _Comments I lCharacteristics Average � Comments
$OD5 o
s T55 7-5-5 30
er�Col,��em_. loon ioor P Q� l�o2m �OW l-Z
'— -S,S 5c) !I 6- 8-5 1sv
ff-
Original Allocation
Revised Allocation Date(s) of Revision(s)
(Please attach previous allocation)
UJ i✓Itvl �SUmrN-P/1
i
epared By: -��6� �fi1 02 �G7 &� Reviewed By: Date:

WASTE LOAD ALLOCATION APPROVAL FORM
Facility Name: Town of Mebane WWTP
County: Alamance Sub-basin: 03-06-02
Regional Office: Winston Salem Requestor: Larry Coble
Type of Wastewater: Industrial
Domestic
If industrial, specify type(s) of industry:
Receiving stream: .oa ams Creek Class: C
Other stream(s) affected: Class:
7Q10 flow at point of discharge: 0 c s
30Q2 flow at point of discharge: -
Natural stream drainage area at discharge point: 1.1 sq mi
Recommended Effluent Limitations
These limits are monthly averages. Allocation curves for both winter
and summer conditions are attached to this form. Qw = 1.2 MGD.
Summer Winter
BOD5 11 mg/l 18 mg/l
NH3 4 mg/l 10 mg/1
DO 6 mg/1 6 mg/1
TSS 30 mg/1 30 mg/l
Fecal Coliform 1000/100 ml 1000/1.00 ml
PH 6-8.5 (SU) 6-8.5 (SU)
This allocation is: / / for a proposed facility
for a new (existing) facility
a revision of existing limitations (winter/summer)
a confirmation of existing limitations
Recommended and reviewed by:
�GLAI Date:
Head, Techncial. Services Branch Date: ,2 Z
Reviewed by: /r
Regional Supervisor l,' Date:j�
Permits Manager (/// Date: S`�
Approved by:
i
Division Director '"/ '�/ ��� Date: