NC0085979_Issuance of Permit_20001117

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor NCDENR
Bill Holman, Secretary
Kerr T. Stevens, Director NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
November 17, 2000
Mr. Eric Motzno
North Carolina Department of Transportation
4809 Beryl Road
Raleigh, North Carolina 27606
Subject:Issuance of NPDES Permit NC0085979
NCDOT Rosman Maintenance Facility
Transylvania County
Dear Mr. Motzno:
Division personnel have reviewed and approved your application for renewal of the subject permit.
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 May 9, 1994 (or as subsequently
amended).
After a review of the draft permit, the following changes have been made :
• The pH limit has been removed from the permit. After discussing the issue with you and the
Asheville Regional Office, it was determined that because your instream waste concentration is so
small, dilution of the effluent flow will be considerable. Monthly monitoring of pH, however,
will continue as a requirement.
• As part of the agreement to eliminate the pH limit, you have agreed to a lower flow allocation of
0.0288 MGD. Given that the facility's average effluent flow is about 5400 gallons per day and has
never exceeded 7800 gallons per day, this is a reasonable adjustment to make.
• The months during which both whole effluent toxicity (acute toxicity test) and EPA Methods
624/625 should be performed have been changed from February, May , August and November to
January, April,July and October. This will allow you to maintain the schedule of the previous
NPDES permit.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearingupon written request within thirty (30)
days following receipt of this letter. This request must be in the frm of a written petition, conformin 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 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.
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

If you have any questions concerning this permit, please contact Natalie Sierra at telephone number
[phone], extension 551.
Sincerely,
Ga,sinal Signed By
David A. Goodrich
Kerr T. Stevens
cc: Central Files
Asheville Re ional Office/Water Quality Section
Point Source Compliance Enforcement Unit
Aquatic Toxicology Unit

Permit NC0085979
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 provision 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\Vater Pollution
Control Act,as amended,the
North Carolina Department of Transportation
is hereby authorized to discharge wastewater from a facility located at the
NCDOT Rosman Maintenance Facility
NCSR 1388
Rosman
Transylvania County
to receiving waters designated as the French Broad River in the French Broad River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II,III and IV hereof.
•
This permit shall become effective January 1, 2001.
This permit and authorization to discharge shall expire at midnight on September 30,2005.
Signed this day November 17,2000.
Original Signed By
David A. Goodrich
Kerr T. Stevens,Director
Division of Water Quality
By Authority of the Environmental Management Commission

• Permit NC0085979
SUPPLEMENT TO PERMIT COVER SHEET
North Carolina Department of Transportation is hereby authorized to:
1. Continue to operate an existing groundwater remediation system (consisting of
direct discharge of chloride contaminated groundwater) located at NCDOT
Rosman Maintenance Facility, NCSR 1388, Rosman, Transylvania County, and
2. Discharge at the location specified on the attached map into the French Broad
River, classified C-Trout waters in the French Broad River Basin.

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NC DOT - Rosman
Latitude: 35'08'38- Sub -Basin: 04-03-02
Longitude: 82'48'00-
Quad #: Rosman
Stream Class: C-Trout
Receivinjz Stream: French Broad River
Permitted Flow: Not specified
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NC DOT
NCO085979
no r I/,] Rosman Maintenance Facility
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Permit NC0085979
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit 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 LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample Location
Average Maximum Frequency
Flow1 0.0288 MGD Continuous Recording Effluent
Acute Toxicity2 Quarterly Grab Effluent
EPA Methods 624/6253 Quarterly Grab Effluent
Chloride Monthly Grab Effluent
pH Monthly Grab Effluent
Footnotes:
1. All volumes of wastewater leaving the facility shall be monitored.
2. Acute toxicity (Fathead Minnow) Pass./Fail at 90% during the months of January, April, July, and October.
Samples for EPA Methods 624/625 should be collected at the same time as the acute toxicity test sample.
3. Chemicals are to be monitored using an EPA approved method equivalent to the detection levels obtainable
by Method 624 and 625 or better.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) ACUTE TOXICITY PASS/FAIL LIMIT (Quarterly)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined
in the North Carolina Procedure Document entitled "Pass/Fail Methodology For
Determining Acute Toxicity In A Single Effluent Concentration" (Revised-July, 1992 or
subsequent versions). The monitoring shall be performed as a Fathead Minnow (Pimephales
promelas) 24 hour static test. The effluent concentration at which there may be at no time
significant acute mortality is 90% (defined as treatment two in the procedure document).
Effluent samples for self-monitoring purposes must be obtained during representative
effluent discharge below all waste treatment. The tests will be performed during the months
of January, April, July, and October.
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 TGE6C. Additionally, DWQ Form AT-2 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621

Permit NC0085979
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences
Branch no later than 30 days after the end of the reporting period for which the report is
made.
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 either these monitoring requirements 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 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.

5A412sic#
AFFIDAVIT OF PUBLICATION
BUNCOMBE COUNTY
SS.
NORTH CAROLINA
POST TN OT
NORTHCAROL rNA Before the undersigned, a Notary Public of said
y r RNVIRONMENTA6s
MANAGEMENT - County and State, duly commissioned, qualified and
COMMISSION/
NPDESUNIT ,, authorized by law to administer oaths, personally
1617MAILSERVIC 7
CENTER appeared Jennifer Hill,who, being first duly sworn,
.1,�O iFICAT ON.¢l-`
INTENTTO ISSUE deposes and says: that he (she) is the Legal Billing
WASTEWATER PERMIT Clerk of TheAsheville Citizen-Times Company,
On the basis of thorough engaged in publication of a newspaper known as
staffsreview and app i-
Stitutteon 143.21.Pu ral The Asheville Citizen-Times, published, issued,
law 92-500 and other
lawful standardsand and entered as second class mail in the City of
regulations, the North
Carolina Environ- Asheville, in said County and State; that he (she) is
mental Managements
Commission proposes to authorized to make this affidavit and sworn
issue a National Pollut-
ant Discharge Elimino-
cion Systeme (NPDEs) statement; that the notice or other legal
wastepermit to discharge
nadvertisement, a true copy of which is attached
listed on the attached
Pages effective 45 dots hereto, was published in The Asheville Citizen-
from the Publish date of
Ibis notice. Times on the following dates: September 23,
Written comments re-
garding the Pra ed 2000And that the said newspaper in which said
It willclays
accepted
r la safterthePub- notice, paper, document or legal advertisement were
ICdate this notice.All
Comments received prior published were, at the timeeachand
f0 that gtate are crm• ofevery
inthe final deteteRYiGt
nation rega I the prr,;i publication, a newspaper meeting all of the
•• ofthIN si o requirements and qualifications of Section 1-597 of
tide .hold a public meet- the General Statues of North Carolina and was a
Ing for the Proposed per-
mit shve aid the Division qualified newspaper within the meaningof Section
receive significant de-
gree of public interest. 1-597 of the General Statues of North Carolina.
Copies of the draft per-
Mit and other support-
ing Information of file
used to determine condi- This 25th dayof September
tions present in the draft P
permit are available (Signature of person making affidavit)
upon request and pay-
ment of the
costs of re-
production. r r uests r ,t
aconin and ti requests
ikZiill-i
�`A/,illfpr information to theQual°Y atme bo e Sworndribed before me the 25th day of
dress or call Ms.
Christie Jackson re- September
tqueststtlNC informationr iioI
Water Quality at the
above address or call ^ Q
Ms.Christie Jackson all / (w vt
771,c ,
(919 733-5083 extension,
438.Plans include the (Notary bile)
NPDES My Commission expires the 20t
)in cr h
day of June of
nication.Interested
may, also visit the IDs rvisi, 2005. �...u:#1••••,,,,
Of Water Quality at 512.N. ....
NaC 276o i `the .•'6',y�N Nl'g9 ....
hours of 8:00am.-5:00p.m I �..• .• .• •�y
1� review info oration al' N•O T�'' yIrk
CV1 1.
NPDE$g Permit Number co �j- r—
NCOWRc&no979. NCDOT - C /'
Rosman Maintenance V
Facility,4809 Beryl Road, •. eL l C
RaleI9gh,NC 27606 has w-
olfed .O ••
fora mit renewal ,,'' (�.,�
Tfor a facilityalocatedyin- l' •CO.„,"
Transylvania County dis-
charging untreated
wastewater into French �...is.Nn.....
Broad River in the
French Brood River Ba-
in.Currently no parame-
t• ,are water quality lim-
as disc~: s .a

Re:DOT-Rosman-one last thing
Subject: Re: DOT-Rosman-one last thing
Date: Tue, 31 Oct 2000 13:34:21 -0500
From: Kerry Becker<[e-mail]>
Organization: NC DENR-Asheville Regional Office
To: Natalie Sierra<[e-mail]>
Natalie:
I would go ahead and drop the limit and require pH monitoring as they
requested. Since they are pumping out only 7800 gpd, the lower flow limit
would be more reflective of what is going on and any modeling based upon
that flow limit would provide (hopefully) more realistic permit
requirements. Also, the French Broad River is quite a good size stream
compared to this discharge so that I don't expect there to be any trouble
with pH esp. around 6.0 to 6.5. I would require monitoring at the least
just to make sure these levels don't drop out too severely and which should
trigger us to look more closely at metals that might show up. pH
measurements upstream and downstream could be added if you want to make
sure.
Kerry
Natalie Sierra wrote:
> Kerry-
> I am getting ready to finalize the DOT-Rosman permit and I have one
> small dilemma. In correpsondence received from the permittee, they
> request that instead of getting a pH limit, that htey lower the monthly
> flow rate to 0.0288 MGD (since the monthly flow is averaging around 7800
> gpd) and get pH monthly monitoring. Prior to this, you had e-mailed me
> saying that it was OK to drop the pH limit. The question is, do I just
> drop the limit? Or do I drop the limit and the flow rate? I hope this
> makes sense. Call me:919-733-5083 ext. 551 if you have any questions.
> thanks,
> natalie
Kerry Becker - [e-mail]
North Carolina Dept. of Environment and Natural Resources
Asheville Regional Office
Division of Water Quality - Water Quality Section
59 Woodfin Place
Asheville, NC 28801
Tel: [phone]
Fax: [phone]
Name: Kerry.Becker.vcf
D
Kerry.Becker.vcf Type: VCard(text/x-vcard)
Encoding: 7bit
Description: Card for Kerry Becker
•
1 of 1 10/31/00 1:37 PM

DIVISION OF WATER QUALITY
October 17, 2000
MEMORANDUM
=r1),
0 V1
II
TO: Dave Goodrich JI] OCT 2 3 2000
THROUGH: Matt Matthews it l
DENR - WATER QUALITY
FROM: Kristie Robeson 14(L-
POINT SOURCE BRANCH
SUBJECT: Draft Permit Correction
NCDOT Rosman Maintenance Facility
NPDES Permit No. NC0085979
Transylvania County
Our office has received the draft permit for the subject facility. The effluent
Special Conditions A(2) page and effluent limits page for this draft contains a different
toxicity testing schedule than what is in the facility's current NPDES permit. The
facility's quarterly toxicity months currently are January, April, July, and October.
Condition A(2) and the limits page in this draft have them conducting toxicity testing
during February, May, August, and November. This change could create some potential
reporting problems for the facility; therefore we recommend this draft be corrected to
reflect the January, April, July, and October schedule. Another error was noted in the
heading of Condition A(2). The word "pass/fail monitoring" should be replaced with
"pass/fail limit."
We appreciate your assistance to undertake the necessary steps to correct the
existing draft permit and incorporate the recommendations cited above. Please feel free
to contact me at 733-2136 if you have any questions.
cc: Natalie Sierra
ESB Facility Files

44 STATE RECEIVED
OCT 2 0 200U
STATE OF NORTH CAROLINA WATER QUALITY SrC T fON
^n-Discharge Permitting
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. P.O.BOX 25201,RALEIGH,N.C. 27611-5201 DAVID MCCOY
GOVERNOR SECRETARY
October 13, 2000
Ms. Natalie V. Sierra D
11)
NCDENR-DWQ-NPDES Unit
1621 Mail Service Center OCT 2 3 2000
Raleigh, NC 27699-1617
RE: Permit NC0085979 DENR - WATER QUALITY
POINT SOURCE BRANCH
NCDOT Rosman Maintenance Facility
Transylvania County
Dear Ms. Sierra:
I have reviewed the proposed changes in the permit for the subject site and would like to offer
the following comments for your consideration:
A.1. Effluent Limitations...for pH shall not be less than 6.0 standard units nor greater than 9.0.
Since the effluent is actually untreated groundwater, the pH is most likely to be very close to 6.0
or even slightly less. Setting limits of 6.0-9.0 may require treatment that would require additional
time and money to maintain if we fail to meet the monitoring requirements. Just recently, the pH
was checked and found to be 6.3. I'm not sure how much this varies throughout the year, but it
could occasionally drop below 6.0. On the other hand, it may never drop below 6.0. I currently
don't have enough information to even know if a limitation on pH poses a problem for us.
The basic principle of this remediation project is that the effluent is sufficiently diluted by the
overwhelming volume of the river so that no treatment is required. During an 18-month period,
when the recovery pumps operated steadily, the effluent averaged about 5400 gallons per day.
There were not any months during which the average daily flow rate exceeded 7800 gallons. If
the effluent should occasionally drop below 6.0, it should not effect the river, which is reported
to have an average flow of 180,000,000 gallons per day. As a compromise to remove the pH
limit, the DOT requests to lower the monthly flow rate to 0.0288 MGD and to record pH during
each monthly sample event.
Department of Transportation,Equipment Unit,4809 Beryl Road, Raleigh,NC 27606 [phone]

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If you have questions,please .nte'at(919)733-2220.
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Draft.permits
Subject: Draft permits
Date: Fri, 13 Oct 2000 15:22:51 -0400
From: Kristie Robeson<[e-mail]>
To: Natalie Sierra<[e-mail]>
Hey Natalie.
I have reviewed the drafts for RP Scherer NC0084344 and also DOT Rosman
NC0085979. For RP Scherer the toxicity testing months in their previous
permit were February, May, August, and November. This draft has March,
June, September, and December as their testing months. We would
recommend changing this draft to February, May, Augst, and November.
The other schedule could create some reporting problems since the
facility is used to when they need to report. Maybe there was a reason
for changing these that I don't know about, if so let me know.
DOT Rosman-The same holds true with this facility. Their current months
for reporting tox data are January, April, July, and October. The draft
has them testing February, May, August, and November. We would
recommend changing this one also.
Also on this one the heading for Condition A(2) needs changing from
monitoring to limit.
Any questions give me a buzz. I'll follow all this up with a memo and
copy you on it.
1 of 1 10/16/00 3:16 PM

Re: 1F.wd:NCDOT Rosman,NC0085979J
Subject: Re: [Fwd: NCDOT Rosman, NC0085979]
Date: Mon, 16 Oct 2000 14:43:26 -0400
From: Kerry Becker<[e-mail]>
Organization: NC DENR- Asheville Regional Office
To: Natalie Sierra<[e-mail]>
Natalie:
Groundwater in this area is typically low due to th of rocks we have here.
Since there discharge is so small to the FBr and pH is
n_ go.
- ,n the FBr. Kerry,
Natalie Sierra wrote:
> I'll make this your call, Kerry.
> Thanks,
> Natalie
> Subject: NCDOT Rosman, NC0085979
> Date: Fri, 13 Oct 2000 15:05:57 -0400
> From: Eric Motzno <[e-mail]. us>
> Organization: North Carolina Department of Transportation
> To: [e-mail]
>
> Attached letter will be mailed on Oct 16, requesting that there
> not be a limit on pH.
> Please considered this request before finalizing the permit
> renewal. Thanks.
> Name: RosmanPermitRenewal.doc
> RosmanPermitRenewal.doc Type: Winword File (application/msword)
Encoding: base64
> Download Status: Not downloaded with message
> Eric Motzno <[e-mail]>
> Enviromental Engineer
> Equipment & Inventory Control Unit,Construction &
Maintenance,Operations,Division of Highways
> Eric Motzno
> Enviromental Engineer
<[e-mail]. us>
> Equipment & Inventory Control Unit,Construction &
Maintenance,Operations,Division of Highways HTML Mail
> Equipment & Inventory Control Unit,Construction &
Maintenance,Operations,Division of Highways 4809 Beryl Road Work: 919. 733.2220
> Raleigh
Conference Software Address
> NC
> 27610
> USA
> Additional Information:
> Last Name Motzno
> First Name Eric
> Version 2. 1
Kerry Becker - [e-mail]
1 of 2 10/16/00 2:45 PM

Re: [Ewd:NCDOT Rosman,NC0085979]
Subject: Re: [Fwd: NCDOT Rosman,NC0085979]
Date: Mon, 16 Oct 2000 14:45:19 -0400
From: Kerry Becker<[e-mail]>
Organization:NC DENR-Asheville Regional Office
To: Natalie Sierra<[e-mail]>
Natalie:
I just realized that the flow reduction request Eric Motzno made should have been
0.00288 instead of 0.0288. He mentions dropping it from 7400
gpd. Kerry
Natalie Sierra wrote:
> I'll make this your call, Kerry.
> Thanks,
> Natalie
>
>
> Subject: NCDOT Rosman, NC0085979
> Date: Fri, 13 Oct 2000 15:05:57 -0400
> From: Eric Motzno <[e-mail]>
> Organization: North Carolina Department of Transportation
> To: [e-mail]
>
> Attached letter will be mailed on Oct 16, requesting that there
> not be a limit on pH.
> Please considered this request before finalizing the permit
> renewal. Thanks.
Name: RosmanPermitRenewal.doc
> RosmanPermitRenewal.doc Type: Winword File (application/msword)
> Encoding: base64
> Download Status: Not downloaded with message
> Eric Motzno <[e-mail]>
> Enviromental Engineer
> Equipment & Inventory Control Unit,Construction &
Main tenance,Operations,Division of Highways
> Eric Motzno
> Enviromental Engineer
<[e-mail]>
> Equipment & Inventory Control Unit,Construction &
Maintenance,Operations,Division of Highways HTML Mail
> Equipment & Inventory Control Unit,Construction &
Maintenance,Operations,Division of Highways 4809 Beryl Road Work: 919. 733.2220
> Raleigh
Conference Software Address
> NC
> 27610
> USA
> Additional Information:
> Last Name Motzno
> First Name Eric
> Version 2.1
Kerry Becker - [e-mail]
North Carolina Dept. of Environment and Natural Resources
1 of 2 10/16/00 2:45 PM

Heli 1ij,a I Pcrnuts
Subject: French Broad Permits
Date:Tue, 01 Aug 2000 09:47:16-0400
From: Kerry Becker <[e-mail]>
Organization: NC DENR - Asheville Regional Office
To: Charles Weaver <[e-mail]>
Charles:
I have five that need minor adjustment, if possible:
1. N00051021 Eagle's Nest Campground: If not already included, add
disinfection and dechlorination.
2 . N00077887 Camp Illahee: Do not renew. They are connected to the
Town of Brevard collection system.
3 . NC0048658 D & D Environmental (formerly Sherwood Forest) : They
need a more accurate flow measurement than instaneous. A counter/float
system would be more accurate in depicting flows. We have had trouble
in the past with the inaccuracies associated with instaneous
measurements. Number 2 above is a prime example.
4. NC0024295 Transylvania Utility: The main plant does not have
disinfection. It does go into the French Broad River which offers a lot
of dilution. Are we considering requiring disinfection?
1,5. NC0085979 DOT Rosman facility: This facility has no treatment in
place as the French Broad River offers a tremendous dilution factor.
The current toxicity test required of the effluent seems to be ludicrous
since these concentrations of salts are surely toxic to aquatic life.
Wouldn' t it be better to require instream toxicity?
Any questions or thoughts, give me a call . Kerry
Kerry Becker - [e-mail]
North Carolina Dept. of Environment and Natural Resources W G' _
Asheville Regional Office
Division of Water Quality - Water Quality Section L�
59 Woodfin Place
Asheville, NC 28801
Tel : [phone]
Fax: [phone] � `/ ��, /
K5c & s�► 733- tv ll,'
Kerry Becker <[e-mail]> 651— url R
NC DENR-Asheville Regional Office �� -IQSG PrIa.t_ i ) IT
Division of Water Quality-Water Quality Section A \--tot.mte
2oWp erL 41.1 NPO'
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I of 2 8/1/2000 10:28 AM

DOT Rosman
Subject: DOT Rosman
Date: Mon, 11 Sep 2000 10:40:55 -0400
From: Kristie Robeson<[e-mail]>
To:Natalie Sierra<[e-mail]>
Hey Natalie.
I talked with Kevin this morning about these guys and he said we would
not permit someone to do instream tox testing. Only tox testing on the
effluent. I thought I remember you saying these guys did not treat this
groundwater or maybe I misunderstood you. They should be treating this
groundwater or at least that was the impression I was under.
1 of 1 9/11/00 10:48 AM

Re:NC0085979
Subject: Re: NC0085979
Date: Thu, 14 Sep 2000 10:14:39-0400
From: Kerry Becker<[e-mail]>
Organization:NC DENR-Asheville Regional Office
To:Natalie Sierra<[e-mail]>
Natalie:
If this is the DOT facility located in Rosman, NC, it would not be
surprising to find (as yet) any organics since what they are pulling out of
the ground is salt from the salt storage areas. If memory serves me
correctly, there is an old municipal landfill (City of Brevard's) adjacent
to this site and there was concern that eventually groundwater from this
site would or perhaps will be drawn into the DOT wells, hence, the organics
monitoring. It would let them know if and when this happened. If you have
any questions, please email or phone me. Kerry
Natalie Sierra wrote:
> Kerry:
> I'm in the process of drafting NC0085979 - NCDOT. The previous permit
> had an organics monitoring req't though it looks as if none of the EPA
> 624/625 compounds have ever been detected in the waste stream. Please
> tell me if this is correct AND if this monitoring requirement should be
> held or eliminated.
> Thanks,
> Natalie
Kerry Becker - [e-mail]
North Carolina Dept. of Environment and Natural Resources
Asheville Regional Office
Division of Water Quality - Water Quality Section
59 Woodfin Place
Asheville, NC 28801
Tel: [phone]
Fax: [phone]
Name: Kerry.Becker.vcf
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. P.O.BOX 25201,RALEIGH,N.C. 27611-5201 DAVID MCCOY
GOVERNOR SECRETARY
February 3, 2000 --,
Mr. Charles H. Weaver, Jr. ' ,� `',
NC Division of Water Quality "� �\ �;
NPDES Unit ` r ' l�"�
1617 Mail Service Center
Raleigh,NC 27699-1617 y
RE: NPDES Permit NC0085979
NC Department of Transportation
Transylvania County
Dear Mr. Weaver:
Enclosed is a NPDES permit application to renew permit#NC0085979. This permit
expires August 31, 2000 and is for the discharge of groundwater contaminated with
chlorides. Groundwater is being pumped from 3 recovery wells at the DOT Maintenance
facility and piped down to the French Broad River without treatment. Included in this
renewal packaged are one original and 2 additional copies each of the cover letter,
application (short form C-GW), a summary of alternatives to surface discharge, a
summary of the most recent analytical results and a USGS topographical map.
I have noted a decrease in chloride concentration in the monitor wells located at the
perimeter of the plume and a nearby supply well. There have been no complaints or
problems associated with the discharge into the river. Approximately 7350 gallons of
groundwater, averaging 3437 ppm of chloride, is being discharged into the river each
day. It is important to continue groundwater recovery and discharge to prevent
contamination from spreading to other private supply wells. Please process this renewal
at your earliest convenience. If you have questions, please call me at(919) 733-2220.
Sincerely
.1/.(:‘,W(7;: ,
Eric Motzno, L.G.
Environmental Engineer
Enclosures
•
Department of Transportation,Equipment Unit,4809 Beryl Road, Raleigh,NC 27606 [phone]

•
NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
ROSMAN MAINTENANCE FACILITY
TRANSYLVANIA COUNTY
Project Summary
In 1992, Mr. Paul Harris complained of salt in his residential supply well. His well is
located approximately 350 feet north of the former salt storage bin in the Maintenance
facility. The Division of Water Quality determined that his well contained chloride at
concentrations exceeding twice those allowed by the NCAC 2L Standards. The source of
the chloride contamination was later confirmed to be the old salt bin. A new salt storage
dome was constructed near the back of the DOT facility,procedures for improved
handling of salt were implemented and the old salt bin was no longer used to store salt.
From 1992 until June 1998, a series of monitor wells were installed and periodically
sampled to track the migration of the chloride plume. In general, the concentrations
peaked in mid-1995 before beginning a slight decrease. Mean while the plume threatens
other supply wells in the neighborhood. In 1996, the Asheville Regional Office
suggested that contaminated groundwater could be discharged directly into the French
Broad River without treatment.
In 1996, S&ME prepared and submitted a NPDES permit application for discharging
contaminated groundwater into the French Broad River. Permit#NC0085979, effective
April 1, 1997,was issued for the discharge of up to 86,400 gallons per day of effluent.
In 1998, Aquaterra Engineering installed the recovery system,which began operation in
June 1998. The system consists of 3 recovery wells, a shed containing a control panel
and flow meters, and a 4-inch diameter discharge line that extends to the river along SR
1129. The system has pumped over 2.4 million gallons averaging over 3,437 ppm of
chloride.
USGS TOPOGRAPHICAL MAP
Attached is part of the Rosman,NC quadrangle map,photorevised in 1990. Scaled at 1-
inch to 2000 feet,it shows the location of the DOT facility at the former state prison
camp. This site is located approximately 1.5 miles north of the town of Rosman on SR
1388. The discharge line leaves the site by going beneath SR 1388 and running east
along SR 1129. At the discharge point,just east of the bridge, a flexible hose extends 10
feet into the river.

ALTERNATIVES FO SURFACE WATER DISCHARGE
When the contamination problem was first discovered,the first option explored to meet
the requirements of Groundwater Section Was to extend the city water supply lines from
Rosman. The City of Rosman and Transylvania County were trying to get Federal funds
to extend the water line to the area just east of the DOT known as Calvert. If the supply
wells within 1,500 feet of the chloride plume were replaced by city water, DOT would
not have to discharge contaminated groundwater. After several years, Federal funds
could not be attained and the plan for expansion of city water was cancelled.
Another option was to install a pump and treatment system to remediate groundwater.
Ideally, a 100% efficient system would remove all of the chloride, which would result in
the discharge of clean water and the production of solid salt that would be returned to our
salt storage bin. Even the most efficient systems (75 to 90%efficient)would still
produce a concentrated solution that would have to be disposed of. A system like this
would cost $100,000 to $200,000,but the disposal cost of the 10 to 25%concentrate
makes the project unfeasible. Without having an ocean to discharge into or an industry
such as a pickle factory nearby, disposal costs could run into the millions of dollars per
year. There are larger treatment systems(de-salinization plants)that are 100% efficient
used for municipal water supplies. However, these systems cost in the millions of dollars.
Subsurface discharge was another option that is used in fuel remediation projects.
However, a treatment system that produces a concentrated solution would be needed and
the same problem of disposal costs must be considered. It would be difficult/expensive
to have a treatment system that would remove enough chloride to return the water to
naturally occurring conditions.
The next option was install a groundwater recovery system and haul all of the discharge
to the nearest acceptable location. Again,the distance to the nearest disposal point makes
this impractical.
The Asheville Regional Office suggested the answer to the problem. The ARO asked the
DOT to consider discharging water directly into the French Broad River,which is a little
over 1 mile away from the DOT facility. Since there is a significant drop in elevation
from the DOT facility to the river, effluent•would flow by gravity to the river without the
use of expensive pumping stations. A DOT contractor designed and installed the system
for about $106,000.

SUMMARY OF ANALYTICAL RESULTS
In accordance with the existing permit,the.DOT has been sampling the effluent every
month. In January, April, July and October,the sample is analyzed for chlorides, total
dissolved solids, volatile organics by Method 624, semivolatile organics by Method 625,
and acute toxicity. For the month in between, the sample is analyzed for chlorides only.
The samples have been analyzed by Pace Laboratory in Asheville and reported to the
Division of Water Quality. Chloride has been averaging 3,437 parts per million.
The most recent sample was collected January 11,2000 and submitted to Pace Lab on the
same day. The lab report,dated January 24, shows normal levels of TDS and chloride at
4,900 and 3,600 ppm respectively. There were no target compounds detected by either
Method 624 or 625. In the acute toxicity test report, dated January 26 from Pace,there
was a 5%mean mortality in both the control sample and the exposure sample. This is
still considered a passing test. Usually,there is a 0%mean mortality in both samples.
Copies of the chemical and toxicity tests are attached.
SLUDGE MANAGEMENT
This recovery system does not generate any sludge. There are no sediment traps, oil-
water separators or holding tanks to accumulate solids. The chloride being recovered is
in solution and not exposed to any evaporative or filtering process.