NC0050342_permit modification_20040120

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
January 20, 2004
Mr. Stanley B. Webb
City of Winston-Salem
P.O. Box 2511
Winston-Salem, North Carolina 27102
ATA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Modification — Clarification of
Effluent Sampling Point
Permit NC0050342
Muddy Creek WWTP
Forsyth County
Dear Mr. Webb:
During the past several months discussions have been ongoing between your agency and the Division of Water
Quality staff concerning the location of the "effluent" composite sampling location regarding the Muddy Creek
WWTP (NC0050342). Based on the information you have provided to Steve Tedder of our Winston Salem
Regional Office and the studies conducted, this office concurs with your request to establish the effluent sampling
location at the parshall flume immediately below the chlorine injection point. NCAC 15A 02B .0508 (b)(1)
States: "If it is demonstrated to the satisfaction of the Director that any of the tests and measurements, sampling
points, or frequency of sampling requirements, as required in this rule for a particular SIC group, are not
applicable to the discharge of a particular water pollution control facility, or if it can be demonstrated that the
objectives of this section can be achieved by other acceptable means, then such requirements may be waived or
modified to the extent the director determines to be appropriate." Under this authority such demonstration has
been accomplished and this letter approves the newly established effluent sampling point for the subject
wastewater treatment facility.
All other terms and conditions contained in the original permit remain unchanged and in full effect. This permit
modification is issued under the requirements of North Carolina General Statutes 143-215.1 and the Memorandum
of Agreement between North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification 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 a written petition conforming to Chapter 150B of the North
Carolina General Statutes, 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.
If you have any questions concerning this permit modification, please contact Valery Stephens at telephone
number [phone], extension 520.
since V1y
•
•
Alan W. Klimek, P.E.
cc: Central Files
Winston-Salem Regional Office — Steve Tedder
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES

Re: Modification of Testing Requirements
Subject: Re: Modification of Testing Requirements
From: Steve Tedder <[e-mail]>
yo 0Date: Fri, 19 Dec 2003 07:44:51 -0500
To: Dave Goodrich <[e-mail]>
Va RAD r
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11J�p t 4 1(($ vritskin rfrttet
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Thanks Dave,—/`-141/201-5-
Below I've suggested some draft language. If you could get your assistant to cut and paste 1
to your letterhead, with any changes or modifications you want to make, and finalize the /
letter it would be appreciated. Once signed, go ahead and send to the City and cc me.
Thanks Again. I'm sure the City will be glad to get this resolved.
Steve
Winston Salem . Forsyth County
City/County Utilities
Attn: Mr. Stan Webb
Manson Meads Complex
2799Griffith Road
Winston Salem, NC 27103
Dear Mr. Webb:
During the past several months discussions have been ongoing between your agency and
the Division of Water Quality staff concerning the location of the "effluent" composite
sampling location regarding the Muddy Creek WWTP (NC0050342). Based on the •
information you have provided to Steve Tedder of our Winston Salem Regional Office and
the studies conducted, this office concurs with your request to establish the effluent
sampling location at the parshall flume immediately below the chlorine injection point.
NCAC 15A 02B .0508 (b)(1) States: If it is demonstrated to the satisfaction of the
Director that any of the tests and measurements, sampling points, or frequency of sampling
requirements, as required in this rule for a particular SIC group, are not applicable to the
discharge of a particular water pollution control facility, or if it can be demonstrated that
the objectives of this section can be achieved by other acceptable means, then such
requirements may be waived or modified to the extent the director determines to be
appropriate.
Under this authority such demonstration has been accomplished and this letter approves
the newly established effluent sampling point for the subject waste water treatment facility.
Sincerely
1 of 3 1/5/2004 3:14 PM

Re: Modification of Testing Requirements
for Alan Klimek, Director
Division of Water Quality
On 12/18/2003 5:14 PM, Dave Goodrich wrote:
Steve -
The signatory authority is delegated to me. I'll be happy to sign the letter. I think that
Mike Templeton and Steve Mauney were working on this earlier this year. I thought
there had been some kind of an official response, but if not, we can move forward with
one.
Dave
Steve Tedder wrote:
NCAC 15A 02B .0508 (b)(1) States:
If it is demonstrated to the satisfaction of the Director that any of the tests and
measurements, sampling points, or frequency of sampling requirements, as
required in this rule for a particular SIC group,are not applicable to the
discharge of a particular water pollution control facility, or if it can be
demonstrated that the objectives of this section can be achieved by other : 4
acceptable means, then such requirements' may:. be waived or modified to the :
extent the director determines to be appropriate.
I am working with the City of Winston Salem on an issue that has been hanging
around since 2002 concerning where they coliect'their effluent samples. Because 'of
several legitimate factors they are collecting their samples below the chlorination unit
rather than several miles further down their discharge pipe below dechlor. Flooding,
questionable telemetry and loss of head pressure of the discharge line are concerns
they have at the "below dechlor" location. They conducted a study to show that the
data at both locations was essentially the same and they collect the Chlorine and Tox
samples below the dechlor unit. They have had no violations of chlorine or tox at this
location for over five years.
I concur with the City that they should be able to continue collecting at their current
location and this became an issue because of an inspection in 2002. Unfortunately the
City did their study and provided it to the region in March of 2003 but the office never
responded. It appears the Region dropped the ball on this one.
I would like to clean up this item and to do so I need to know if I can make such
changes by letter under my signature and reference that the Director has concurred, or
if I need to draft a letter for Alans signature. Or could I draft it for Alans signature
2 of 3 1/5/2004 3:14 PM

Re: Modification of Testing Requirements
and sign for him.
Any suggestions? Just trying to clean up one that should have been cleaned up some
time ago.
Thanks
Steve Tedder
NC DENR Winston-Salem Regional Office
Division of Water Quality, Water Quality Section
585 Waughtown Street
Winston-Salem, NC 27107
Voice: [phone] ext 259
FAX: [phone]
Steve Tedder
NC DENR Winston-Salem Regional Office
Division of Water Quality, Water'Quality Section
585 Waughtown Street
Winston=Salem,, NC 27107
Voice: [phone] ext 259
FAX: [phone]
3 of 3 1/5/2004 3:14 PM

Mr. Stanley B. Webb, Wastewater Operations Superintendent
City of Winston-Salem
2799 Griffith Road (Manson Meads Complex)
Winston-Salem, NC 27103
SUBJECT: Emergency Repair of 001 Effluent Outfall
Muddy Creek WWTP (NC0050342)
City of Winston-Salem
Forsyth County
Dear Mr. Webb:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
6 June 2003
JUN 1 2 2003
DENR VVATER QUALITY
POINT SOURCE. BRANCH
The Division of Water Quality has received and reviewed the City's request to temporarily move the 002
discharge point for the Muddy Creek WWTP approximately one mile downstream to the mixing vault at the
dechlorination facility. This proposed move would enable the City to provide adequate chlorine contact time and
dechlorination capability while the WWTP temporarily discharged into Muddy Creek during the time emergency
repairs are made to the WWTP's 001 effluent outfall at the Yadkin River.
Outfall 002 has several disadvantages over the proposed discharge location (not identified as an outfall in the
current NPDES permit). First, Outfall 002 is not sized to handle the full WWTP flow under gravity flow conditions and
there is no simple way to add supplemental pumping without the construction of a pumping station. Second, given
Outfall 002's proximity to the chlorination point, chlorine contact time would not be sufficient for adequate fecal kill.
Third, Outfall 002 is upstream of the dechlorination station, which would result in the discharge containing chlorine
residual. Conversely, discharging from the mixing vault at the dechlorination station offers several advantages. The
mixing vault offers access for effluent pumping, chlorine contact time is improved, and the final effluent would be
dechlorinated.
Discharge at the proposed location is a bypass under the terms of the City's NPDES permit. The Standard
Conditions found in Part II, Section C, Condition 4 prohibit any bypass except where "[t]here were no feasible
alternatives to the bypass" and the permittee provides notification of such an occurrence. This particular case seems to
meet these criteria. In addition, Part II, Section C, Condition 4(b) provides that "[t]he permittee may allow any bypass
to occur which does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to
assure efficient operation."
The Division of Water Quality believes that the proposed temporary discharge location will be more protective
of the receiving stream (Muddy Creek) and is allowable under the bypass provisions contained in NPDES Permit No.
NC0050342. Therefore, the Division hereby grants approval of the City's request to temporarily relocate the Outfall
002 location approximately one mile downstream to the mixing vault at the dechlorination facility pursuant to the
following three (3) conditions:
(1)
This approval shall not be construed to authorize the creation or maintenance of a nuisance. Also, it may
be revoked because of material changes in the amount of waters discharged or for failure to maintain
treatment efficiencies and other conditions stated in pertinent discharge permits for the Muddy Creek
Wastewater Treatment Plant. This document is subject to any valid limitations of any local, private, or
special act or resolution relating to health, sanitation, the abatement of nuisances, or relating to non -
navigable streams. It is not intended, nor shall it be construed to create, confer, permit, or approve the
exercise of any right, power, privilege, or immunity which may be forbidden by the valid provisions of
any such local, private, or special act or resolution;
EVA
tdCDENR
N. C. Division of Water Quality/Water Quality Section 585 Waughtown Street Winston-Salem, NC 27107 [phone] Customer Service
1 800 623-7748

Mr. Stanley B. Webb
6 June 2003
Page #2
(2) This approval does not authorize the City of Winston-Salem to violate any water quality standards; and,
(3) The City must notify the Winston-Salem Regional Office via telephone followed by written
correspondence ty the temporarily relocated Outfall 002 is activated.
Should you have any comments ort questions regarding this matter, please contact our Office at (336) 771-
4600.
Sincerely,
Steve Maui1ey
Acting Water Quality Supervisor
Cc: Dave Goodrich, NPDES Unit
Forsyth County Health Department
Central Files
WSRO

muddy crgek wwtp - request for alternate discharge point
Ncc sv34Z
Subject: muddy creek wwtp - request for alternate discharge point
Date: Wed, 04 Jun 2003 13:07:24 -0400
From: Mike Templeton <[e-mail]>
To: Steve Mauney <[e-mail]>
CC: Dave Goodrich <[e-mail]>
Re: Winston-Salem request for temporary relocation of Outfall 002
Steve -
Dave and I have reviewed the City's request and have consulted with Coleen on the matter. It is our opinion that the proposed
discharge is acceptable under the terms of the City's NPDES permit.
Our rationale for approving the proposed discharge is that:
1. Emergency repairs are necessary at the end of the Outatl 001 line. Approx. 200 ft. of 66" diam. line separated from the
main tine and must be repaired or replaced to re-establish the outfatl. The City will have to discharge at some other
point while repairs are made.
2. The proposed discharge point, although not identified as an outfatl in the permit, has several advantages over Outfall
002:
First, Outfall 002 is not sized to handle the full plant flow under gravity flow conditions, and there is no simple way to
add supplemental pumping here (it would require construction of a pumping station). Second, given the outfall's
proximity to the chlorination point, chlorine contact time would not be sufficient for adequate fecal kill. And third,
the outfatl is upstream of the dechlorination station, so the discharge would contain chlorine residual.
On the other hand, discharging from the mixing vault at the dechlorination station offers several advantages: the
mixing vault offers access for effluent pumping, chlorine contact time is improved, and the final effluent is
dechtorinated.
3. Discharge at the proposed point is a bypass under the terms of the City's NPDES permit. The Standard Conditions of the
permit (Part II, Section C, Condition 4.) prohibit any bypass except where "[t]here were no feasible alternatives to the
bypass" and the permittee provides notification. This case seems to meet these criteria. In addition, Condition 4.b. in
the same section provides that:
'The permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded, but only if it
also is for essential maintenance to assure [sic] efficient operation."
We believe that the proposed temporary discharge point will be more protective of the receiving stream and is allowable
under the bypass provision of the City's permit. Therefore, we concur with the Region's approval of the City's proposal.
- Mike T
Michael E. Templeton, P.E.
North Carolina Division of Water Quality
NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
919-733-5083 x541 FAX: [phone]
mailto: mike. templeton@ncmail. net
1 of 1 06/04/2003 1:49 PM

Winston-Salem • Forsyth County
/County Utilities
ater • Sewer • Solid Waste Disposal
Manson Meads Complex • 2799 Griffith Road • Winston-Salem, NC 27103 • Tel [phone] • Fax [phone]
April 17, 2003
Mr. David Goodrich
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Dear Mr. Goodrich:
APR 2. 2. 2003
Subject: Emergency Repair of 001 Effluent Outfall
Muddy Creek WWTP (NC0050342)
City of Winston-Salem/Forsyth County
Earlier this month I spoke to you regarding a major permit modification to move the 002
discharge point for our Muddy Creek WWTP about one mile downstream to the mixing
vault at our dechlorination facility. This move would enable us to provide adequate
chlorine contact time and dechlorination capability while the plant temporarily
discharged into Muddy Creek when emergency repairs are made to the plant's 001
effluent outfall at the Yadkin River. The plant's 66-inch effluent outfall broke during a
recent flood event.
It was our intention to permanently move the 002-discharge point downstream to the
mixing vault at our dechlorination facility after the 001 outfall is repaired. This location
would allow us better access for monitoring the 002 discharge and the discharge point
would be downstream of our chlorination/dechlorinaton process. Unfortunately, we are
unable to do this at this time.
Hazen and Sawyer have determined that we will submerge the final clarifier weirs if we
move the 002-discharge point to the proposed location. We must construct a flood
control pumping station at the plant before we can permanently move the 002 discharge.
We still must make emergency repairs on the 001 outfall line near the Yadkin River and
this will require that we divert the plant's entire effluent flow to Muddy Creek for a short
period of time.

Mr. David Goodrich
April 17, 2003
Page 2
Our engineers have devised a plan to take flow off the 001 outfall while a temporary 60-
inch line is installed to carry the plant discharge while we make repairs. This will be
done by closing a slide gate at the mixing vault currently being constructed at the
dechlorination facility and pumping the plant flow into Muddy Creek. We must pump the
plant discharge to prevent a hydraulic surcharge in the secondary clarifiers.
We estimate that the contractor will need about three days to get the temporary line
installed. Once completed, the plant will resume discharging into the Yadkin River until
the 66-inch line is repaired. After the line is repaired, we need to pump the plant's
effluent flow into Muddy Creek for another three-day period while the 66-inch line is
placed back into service.
We ask that DWQ grant us permission to discharge into Muddy Creek from the
dechlorination-mixing vault. We think we can accomplish what we need to do by having
two diversions of three days each.
We prefer not to use our existing 002-discharge point for this because we do not have
adequate chlorine contact time to ensure adequate fecal kill and there are no provisions
for dechlorination at this location. The current 002 discharge is designed for use during
flood events and we can better protect Muddy Creek if we are allowed to discharge just
downstream of the dechlorination process.
If you are not the DWQ official that needs to make this decision please forward it to the
proper authority. if possible we would like a decision on this by May 26. If this is not
possible, please let me know when a decision will be forthcoming so we can finalize our
plans.
Thank you for your assistance in this matter and please call me at [phone] if you
have any questions or need additional information.
Stanley B. Webb
Wastewater Operations Superintendent
CC: Ron Hargrove, Deputy Director of Utilities
Steve Mauney, WSRO
Jim Struve, Hazen and Sawyer PC
Chris Shamel, Plant Supervisor
Ref:L041703a

Winston-alem Muddy Creek WWTP - Plant Effluent Bypass
Subject: Winston-Salem Muddy Creek WWTP - Plant Effluent Bypass
Date: Tue, 11 Mar 2003 17:35:42 -0500
From: "Michael D. Parker" <[e-mail]>
To: <[e-mail]>
CC: "James N. Struve" <[e-mail]>
Mike,
I am writing to summarize a request on behalf of the City of Winston-Salem to evaluate relocating the existing (permitted) plant
effluent bypass point along the effluent outfall from the Muddy Creek WWTP to a new (currently non -permitted) location further
downstream in Muddy Creek.
In summary:
* The existing 66-inch plant outfall discharges into the Yadkin River at a distance of +/- 5 miles from the Muddy Creek WWTP.
* There is an existing (permitted) effluent bypass point ("002 discharge point") that Is located +/- 600-feet downstream of the
discharge point from the WWTP chlorination facilities, upstream of dechlorination facilities. How will only bypass during extreme flood
conditions under the current rated plant flows (e.g. 100-year flood).
* There are existing facilities to inject sodium bisulfite into the effluent outfall pipe at a distance of approximately 7,000-feet from the
WWTP to achieve dechlorination after sufficient chlorine contact has taken place. A project is currently under construction to add a
mechanical mixing vault, flow meter, and ORP analyzer at this location to more effectively mix and monitor sodium bisulfite addition to
the plant effluent. This work is referenced in correspondence from Michael Myers to myself dated January 17, 2002.
* The City has identified portions of the 66-inch outfall downstream of the dechlorination facilities with significant damage that must
be repaired, primarily at the discharge point into the Yadkin River. In order to make these repairs, the City anticipates needing to
divert flow through the existing bypass. The City has raised two concerns about utilizing the existing bypass: insufficient chlorine
contact time and requiring temporary dechlorination facilities.
* The City has requested that Hazen and Sawyer evaluate providing an overflow bypass in the vault which would bypass flow into
Muddy Creek in place of the existing bypass point. The advantage of relocating the existing bypass point is to bypass disinfected,
dechlorinated plant effluent into Muddy Creek.
* Flow bypass would occur over a weir set above the 100-year flood elevation. An ultrasonic level sensor would be installed to
measure bypass flow over the weir. Flow would discharge into a concrete structure from which it would discharge overland (with
appropriate erosion control measures) into Muddy Creek. Cascade aeration will be evaluated based on existing topography.
Please let me know if there are any preliminary thoughts on the feasibility of relocating the bypass point. We would also like to have an
idea of what amount of time and process (meetings, correspondence, etc.) would be required to acquire a new permit. Thank you
for consideration of this request.
Sincerely,
Michael D. Parker
Hazen and Sawyer, P.C.
4944 Parkway Plaza Blvd,
Suite 375
Charlotte, NC 28217
T: [phone]
F: [phone]
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1 of 1 03/12/2003 11:06 AM

[Fwd: City of Winston-Salem discharge]
Subject: [Fwd: City of Winston-Salem discharge]
Date: Thu, 13 Mar 2003 14:07:59 -0500
From: Susan Wilson <[e-mail]>
Organization: N.C. Dept. of Health and Human Services
To: Susan A Wilson <[e-mail]>
Susan,
I think this is for you.
Susan M. Wilson
Subject: City of Winston-Salem discharge
Date: Thu, 13 Mar 2003 13:46:25 -0500
From: Corey Basinger <[e-mail]>
Organization: NC DENR Water Quality
To: Dave Goodrich <[e-mail]>, [e-mail],
susan.wilson@ncmail net
CC: Steve Mauney <[e-mail]>
Dave and/or Susan,
I have been contacted by Stan Webb, WWTP Manager for the City of
Winston-Salem regarding a problem with the 001 discharge for the Muddy
Creek WWTP (NC0050342). On Feb. 26, 2003, a sinkhole was discovered at
the end of the five (5) mile long 66" outfall. The pipe separated due
to recent flooding of the Yadkin River subsequent to heavy rainfall.
Approximately 200 feet of the 66" outfall pipe needs to be excaveted,
repaired, and properly backfilled.
The WWTP also has another discharge location (002) that is only
utilized during high flow conditions existing in the Yadkin River. When
the Yadkin River rises above a certain level, the entire discharge from
the facility is then diverted to the 002 outfall into Muddy Creek, which
eventually empties into the Yadkin River just downstream of the
previously discussed 001 outfall.
In order to repair the 001 outfall damage, obviously the flow will
have to be diverted to the 002 outfall. It is estimated to take 5-7
days to complete the repairs (assuming good weather conditions).
Items of note during the extended 002 discharge are:
1) There currently does not exist ample detention time for
adequate fecal kill unless excessive chlorination occurs. And, the 002
discharge is upstream of the dechlorination facility. I would assume
that the 002 outfall does not have TRC limits for this reason and the
fact that discharge from this location is rare and only continues for a
short time until the Yadkin River's flow subsides.
2) It may be difficult to maintain DO levels above 5.0mg/1 in
the short distance to the 002 outfall.
Here is Mr. Webb's proposal for discharge during the repair to the 001
outfall.
The City would like to modify its dechlorination facility located at
Frye Bridge Rd. along the five (5) mile long 66" outfall line. This
facility is located adjacent to Muddy Creek between the 002 outfall
location and the Yadkin River. The modification would allow for
adequate detention time (ie proper fecal kill and dechlorination) prior
to discharge to Muddy Creek. The City's engineers are currently working
on a proposal to submit to DWQ to do just that. However, now that the
1 of 2 3/17/03 10:09 AM

[Fwd: City of Winston-Salem discharge]
damage to 001 has been discovered and needs to be repaired ASAP, there
exists a delima. How should the City proceed with the repair? It seems
that the modifications to the dechlorination facility will be completed
soon and could be easily retrofitted to allow a discharge at that
location. I fully realize that this would warrant a major permit
modification with full DWQ plan review since the 002 discharge would be
relocated. Under the current conditions and need for a quicker response
that I'm sure would be possible for detailed review by DWQ, what options
does the City have? What type paperwork would be required? What
emergency provisions, if any, are available?
I know this sounds like a confusion scenario. It was for me until I
visited all three (3) of these locations today. I'll be glad to discuss
them with you via telephone if you choose. Any and all advice is
welcomed. Thanks in advance for your assistance in this matter.
Corey
STAN- If I have incorrectly stated the case, please advise. Thanks!
2 of 2 3/17/03 10:09 AM