NC0021709_Speculative Limits_19980209

NPDES DOCUMENT SCANNIN. COVER !;I1EET
NPDES Permit:
NC0021709
Jefferson WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 9, 1998
This document is printed on reuae paper - ignore any -
content on the weircrse aide

ern
NCDENR
JAMES B. HUNT JR.
GOVERNOR
WAYNE MCDEVIT'T
SECRETARY
A. PRESTON HOWARD,
JR., P.E.
DIRECTOR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
February 9, 1998
Mr. Meredith Ballou, Town Manager
Town of Jefferson
P.O. Box 67
Jefferson, North Carolina 28640-0067
Subject: Speculative Limits for Jefferson WWTP
NPDES Permit No. NC0021709
Ashe County
Dear Mr. Ballou:
This letter is in response to the request of Mr. Danny Bridges of McGill
Associates for speculative effluent limits for the Town of Jefferson WWTP's
proposed expansion to 330,000 GPD on an interim basis and 600,000 GPD on a
permanent basis. The staff of the NPDES Unit of the Point Source Branch has
reviewed this request.
Please be advised that response to a speculative request does not guarantee
that the Division will issue an NPDES permit to discharge treated wastewater. In
accordance with the North Carolina General Statutes, the practicable waste
treatment and disposal alternative with the least adverse impact on the
environment is required to be implemented. Nondischarge alternatives, such as
spray irrigation or connection to a regional treatment and disposal system, are
considered to be environmentally preferable to a discharge. Therefore, prior to
submittal of an NPDES application, a detailed alternatives analysis must be
prepared to assure that the environmentally sound alternative was selected from
the reasonable cost effective options. Attached is a guidance document that will
assist you or your consultant in preparing an engineering alternatives analysis.
The Town of Jefferson discharges into Naked Creek, which has a stream
classification of C+. The plus (+) symbol identifies the receiving stream as being
subject to a special management strategy to protect downstream waters designated
as ORW (outstanding resources water). Jefferson's WWTP is located upstream of
the segment of the New River that has been reclassified as C ORW.
P.O. BOX 29535, RALEIGH, NORTH CAROLINA 27626-0535
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - SO% RECYCLED/10% POST -CONSUMER PAPER

Letter to Mr. Ballou
Page 2
Currently, the Division of Water Quality (DWQ) has specific management .
strategies for the New River that have been approved to protect the exceptional resource
waters. This strategy includes designated limitations for new and expanded dischargers,
stormwater controls, 50% of the total instream flow not to be exceeded by total volume
Of upstream discharges, and safety factors for toxics and toxicity to be protected at the
ORW segment. The specific action recommended for the South Fork New and New
Rivers ORW area per 15A NCAC 2B.0225 (e)(4)(B) and (C) states that "new or
expanded NPDES permitted discharges located upstream of the designated ORW" will
comply with limits for oxygen consuming wastes of BOD5 of 5 mg/1 and NH3-N of 2
mg/1. A dissolved oxygen limit of 6 mg/1 and a fecal coliform limit of 200/100m1 are
also required. In addition, a limit for total suspended solids of 20 mg/1 will be applied to
all discharges to non -trout waters. Therefore, the following effluent limitations for
tertiary treatment will be applicable to all future expansions for the Jefferson facility:
Summer Winter
BOD5 5 mg/1 10 mg/1
NH3-N 2 mg/1 4 mg/1
DO 6 mg/1 6 mg/1
TSS 20 mg/1 20 mg/1
Fecal 200/ 100m1 200/ 100m1
DWQ is recommending chlorine limits and dechlorination for all new or
expanding dischargers proposing the use of chlorine for disinfection. An acceptable level
of chlorine in the effluent at either wasteflow is 28 pg/l. The process of
chlorination/dechlorination or an alternate form of disinfection, such as ultraviolet
radiation, should allow the facility to comply with the total residual chlorine limit. •
The instream waste concentrations (IWC) for Jefferson at the expanded
wasteflows are:
Wasteflow IWC
0.330 MGD 19%
0.600 MGD 30%
A chronic toxicity testing requirement with quarterly monitoring will remain a
condition of the NPDES permit. Per 15A NCAC 2B.0225 (e)(4)(B)(iii), "a safety factor
shall be applied ...to protect for chronic toxicity in the ORW segment ... ". The Town
can anticipate that effluent limits and/or monitoring for cadmium, cyanide, copper, lead,
silver, zinc, and mercury may be recommended after a review of monitoring data. A
complete evaluation of limits and monitoring requirements for metals and other toxicants
will be addressed at the time of formal NPDES application.

Letter to Mr. Ballou
page 3
DWQ has implemented a basinwide water quality management initiative. The
plan for the New River Basin was issued in September 1995. The plan attempted to
address all sources of point and nonpoint pollutants where deemed necessary to protect of
restore water quality standards. In addressing interaction of sources, wasteload
allocations may be affected. Those facilities that have already committed to high levels
of treatment technology are least likely to be affected.
We hope this information provides some assistance in your planning endeavors.
As previously mentioned, final NPDES effluent limitations will be determined after a
formal permit application and modification request has been submitted to the Division.
If there are any additional questions concerning this matter, please feel free to contact
Jackie Nowell at [phone] (ext. 512).
Sincerely,
David A. Goodrich' 1
NPDES Unit Supervisor
Water Quality Section
DAG/JMN
cc: Steve Mauney
Bobby Blowe, Construction Grants
Danny B. Bridges, McGill and Associates
Michelle Suverkrubbe
Central Files
WLA File

NC0021709
Jefferson WWTP
Naked Creek C+
050701
Sneculative Request
Engineer has requested spec limits for an interim wasteflow of 0.330 MGD and
permanent wasteflow of 0.600 MGD for the Jefferson WWTP. Existing design flow is
0.300 MGD with secondary limits for BOD5 and TSS and limits for cadmium and
cyanide. Also have monitoring for Cu, Ni, Pb, Zn, Hg and Ag.
The facility is located in the New River Basin and located upstream of a segment
of the South Fork New River classified as C HQW and the New River which is classified
as C ORW. The management strategy for new and expanding dischargers in the
South Fork New and New Rivers ORW area as given in NCAC 2B .0225 (e)(4)(B)
and (C) will be applicable. Limits for oxygen consuming waste such as BOD5=5,
NH3=2, and DO=6 will be applied. TSS limits of 20 mg/1 will be given, in addition to
chlorine = 28 ug/1 and fecal coliform = 200.
Effluent Data Review
Looked at 1995-97 data, plant appeared to be fairly operating well. There was
one exceedance for BOD5 in March 1997. NH3 toxicity limit was dropped from permit
in April 1995, but NH3 monitoring requirement was also deleted. Therefore, there are no
NH3 values reported for the past 2 1/ years. With the expansion to 0.330 MGD, a NH3
limit of 2 mg/1 will now be required per the management strategy. If the expansion is
not done, upon renewal of existing permit at 0.300 MGD, recommend that NH3
monitoring be placed into the permit to see the level of treatment.
See letter for specific limits and requirements per basinwide plan.

Jefferson WWTP
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Concentration (ug
Fecal Limit
Ratio of 4.3 :1
2.2
0.33
0.5115
17.0
0
18.86
90.12
Ammonia as NH3
(summer)
7Q10 (CFS) 2.2
DESIGN FLOW (MGD) 0.33
DESIGN FLOW (CFS) 0.5115
STREAM STD (MG/L) 1.0
UPS BACKGROUND LEVEL 0.22
IWC (%) 18.86
Allowable Concentration (IT 4.35
Ammonia as NH3
(winter)
7010 (CFS) 3.4
200/100m1 DESIGN FLOW (MGD) 0.33
DESIGN FLOW (CFS) 0.5115
STREAM STD (MG/L) 1.8
UPS BACKGROUND LEVEL 0.22
IWC (%) 13.08
Allowable Concentration (IT 12.30
2/4/98
JMN
NC 0021709

Jefferson WWTP
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Concentration (ug
Fecal Limit
Ratio of 2.4 :1
Ammonia as NH3
(summer)
2.2 7Q10 (CFS)
0.6 DESIGN FLOW (MGD)
0.93 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
29.71 IWC (%)
57.22 Allowable Concentration (rr
Ammonia as NH3
(winter)
7Q10 (CFS)
200/100mI DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Concentration (IT
2.2
0.6
0.93
1.0
0.22
29.71
2.85
3.4
0.6
0.93
1.8
0.22
21.48
7.58
2/4/98
JMN
NC21709

FROM :MCGILL ASSOCIATES TO S19 773 9919
1997,11-13 00:0S #973 P.O1/02
3 McGill FAX TRANSIVIITTAL
ASSOCIATES
PLEASE DELIVER TITE FOLD
NAME: Ms. Ruth Swanek
COMPANY: DENR - DWQ
FAX NUMBER: 919-733-9919
DATE: 11\12197 PROJECT (AND PROJECT NUMBER): 97164.01
TOTAL NUMBER OF PAGE(S) 2 (INCLUDING COVER SHEET)
IF YOU DO NOT RECEIVE ALL PAGES OR HAVE ANY PROBLEM WITH RECEIVING
THIS TRANSMISSION, PLEASE CALL CONNTE AT 1-704-252-4575
FROM: Danny Bridges
McGILL ASSOCIATES, F.A.
CONSULTING ENGINEERS 55 BROAD STREET
ASHEVILLE, NORTH CAROLINA ,28801
TELEPHONE: [phone]
COMMENTS:
Ms. Swanek,
FAX NUMBER; 1-704-252-2518
PIease provide me with the current status of the attached request. We would like to submit
a request for permit modification to increase discharge to 330,000 in the near future.
I will be in around 8 am on Thursday until about 11 am. Sincerely,
Danny Bridges
1 AX.DOe
Engineering • Planning • Finance
McGill Associates, P.A. • F.Q. Box 2259, Asheville, NC 28802 • 55 Broad Street, Asheville, NC 28801 • 704.252.0575 • FAX [phone]

FROM';MCGILL GSSOCIGTES TO SSS 777 SS19.
1SS7,11-17 CO:06 41572 F.02/02
McGffl
ASSOCIATES
August 18, 1997
Mr. David Goodrich
North Carolina Department of Environment,
Health and Natural Resources
Division of Water Quality
Post Office Box 29535
Raleigh, North Carolina 27626-0535
Dear Mr. Goodrich:
RE: Town of Jefferson
N1'DES # NC0021709
The Town of Jefferson currently has a NPDES permit to discharge 300,000 pd to the
Naked Creek. On behalf of the Town of Jefferson, we respectfully request the following
information from your division;
1. Speculative permit limits to discharge 330,000 gpd to the Naked Creek on an interim basis
and 600,000 gpd on a permanent basis for near future expansion.
These requests have become necessary due to the fact that the Townh's facility is currently
averaging 80 % of the facility's design capacity.
We appreciate your assistance with this very important issue. If you have any questions,
please do not hesitate to call me.
Sincerely,
McGl:LL ASSOCIATES, P.A.
DANNY 13. BRIDGES, P.E.
DBB
Meredith Ballou, Manager
Tim Church
89l 15.40/]3ridges/DG18Aug7. doe
Engineering • Planning • Finance
.McGill Associates, P.A. • P.O, Sox 2259, Asheville, NC 28S02 • 55 Sroad Srreer, Asheville, NC 28801
704-252.0575 • FAX [phone]