NC0085979_Draft Permit_20210511

ROY COOPER
Governor _.
DIONNE DELLI-GATTI -
Secretary
S. DANIEL SMITH
Director NORTH CAROLINA
Environmental Quality
May 11, 2021
NCDOT Roadside Environmental Unit
Attn. Sheri Knox,Associate Remediation Engineer
4021 Stirrip Creek Drive, Suite 100
Durham,North Carolina 27703
Subject: Review of NPDES Permit DRAFT
NC0085979,WWTP Grade PCNC
Rossman Maintenance Facility
100 Old Calvert Landfill Road
Transylvania County
To Ms.Knox:
The Division of Water Resources(DWR or the Division)received on February 8,2021 your application
to renew the subject permit.Please carefully review the attached renewal draft to ensure your
understanding of its limits and monitoring conditions,and to correct errors,if any.
Concurrent with this notification,the Division will solicit public comment on this draft by publishing a
notice in newspapers having circulation in the general Transylvania County area,as required by the
NPDES Program.Please submit your written comments(if any),to my attention,NCDEQ/DWR/
NPDES no later than June 15,2021 (approximately 30 days after receiving this document)..We welcome
your written comments,but they are not mandatory.
Database Evaluation.In keeping with current NPDES Permitting Guidance,DWR evaluated monitoring
data by applying reasonable potential analyses(RPAs)as required by the EPA. Each parameter of
concern(POC)is considered for its potential to exceed its respective surface water-quality standard.
Since last renewal,the Division understands that NCDOT has made no significant alterations to
treatment/pollution-prevention processes at the subject facility.We have updated the site map and permit
texts to include:
1. Benzidine—monitoring only(see permit section A. (1.)and explanation below.
2. updated text for electronic reporting requirements.
3. updated WET-test language
Practical Quantitation Not
=
EPA 624/625 SWQ Level(PQL) X X o
Parameters of Concern Standard (Second PQL= subsequently refined
d
test method)
Benzidine 0.00014 µg/L 50 µg/L X
Hexachlorocyclopentadine 4 µg/L 10 µg/L X
Pentachlorophenol Aesthetic 10 µg/L X
Bis(2-Ethylhexyl)Phthalate 0.37 µg/L 5 µg/L [common lab contaminant] X
North Carolina Department of Environmental Quality I Division of Water Resources
-,Q 512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617-919.707.9000

Sheri Knox,Associate Remediation Engineer
Draft Permit Review
May2021
Lab Test Method PQL is reported insufficiently sensitive to detect respective SWQ standards.The
Permittee is instructed to inquire of its laboratory if these parameters were or are tested at the"limits
of technology."Follow-up analytical reporting may be required as well as an amending eDMRs.
Monthly Report Submittals: Federal regulations require electronic submittal of all program reports
and Monthly Discharge Monitoring Reports(DMRs); see Permit Condition A. (3.). Our records
show that NCDOT has successfully registered for the Electronic Discharge Monitoring Report
(eDMR)program.If you have completed and submitted to DWQ an Electronic Signature
Agreement,you are no longer required to submit DMR hardcopy as back-up to the eDMR.
The NPDES standard conditions(Parts II,III,and IV),are part of this permit but are not included in this
draft document(cover,map, and Part I).The conditions are identical to your current permit except that
agency and division names have been updated.The latest version of Parts II,III,and IV are available
at https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file.
Following the mandatory 30-day Public Comment period,the Division will review all pertinent comments,
if any, and take appropriate action prior to issuing an NPDES permit fmal.
If you have questions,please email the undersigned at [oe.corporon@a,ncdenr.gov].In support of mandated
emergency response to Covid 19,most of NC state government currently functions remotely,therefore
correspondence via email is preferred.
Respectfully,
i
Joe . Corpor ,P.G.
D/ /DWR/ DES ermitting
Enclosure:NPDES Permit NC0085979 renewal/
( draft)
ec: DWR/NPDES Program Files Laserfiche
DWR/OCU,Maureen Kinney
DWR/ARO,Timothy H.Heim
DWR/ATB,attention Zach Thomas,cc Cindy Moore

Permit NC0085979
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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 Water Pollution Control Act, as amended,
North Carolina Department of Transportation (NCDOT)
Road ids Enviro e tal U it
h riz is ar a wastewa rhlfacilitylocated at the
is herebyauthorized ch
g
NCDOT Rosman Maintenance Facility
100 Old Calvert Landfill Road, Brevard
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 applicable conditions set forth
in Parts I, II, III and IV hereof.
This permit shall become effective , 2021.
This permit and authorization to discharge shall expire at midnight on September 30, 2025.
Signed this day , 2021.
S. Daniel Smith, Director,
Division of Water Quality
By Authority of the Environmental Management Commission
Page 1 of 9

Permit NC0085979
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore,the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
North Carolina Department of Transportation (NCDOT)
Roadside Environmental Unit
is hereby authorized to:
1. continue to operate an existing groundwater r- ediation s - •. sisting f\
• four(4)recovery wells,
• a shed containing a control panel and •eters,
• a 4-inch diameter disc.: 1- i - extend g t• - river :1• : roadway SR 1129,
these facilities located at NCDOT Rosin. M.' tenance '.cility, 0 i a d Calvert Landfill Road,
Brevard, Transylvania Co , d
\\\
2. discharge from said treatment works via Outfall 001 at the location specified on the attached map
into the French Broad River [stream index No. 6-(1)] a waterbody currently classified B-Trout within
stream segment 04-03-01 [HUC 06010105] of the French Broad River Basin.
Page 2 of 9

Permit NC0085979
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.;WWTP Class PCNC [15A NCAC 08G .0302]
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, monitored and reported' by the
Permittee as specified below:
EFFLUENT EFFLUENT MONITORING
CHARACTERISTICS LIMITS REQUIREMENTS
Monthly Daily Measurement Sample Sample
[Parameter Code] Average Maximum Frequency Type Location
Flow 2 MGD Continuous Recording Effluent
pH > 6.0 and<9.0 S.U. Monthly Grab Effluent
Benzidine Monthly Grab Effluent
Chloride Monthly Grab Effluent
EPA Methods 624/625 4 Quarterly Grab Effluent
WET Acute Testing 3 TGE6C Quarterly Grab Effluent
Footnotes:
1. Beginning on the effective date of this permit, submit discharge monitoring reports electronically using
NC DWR's eDMR application system. See Special Condition A. (3.).
2. The Permittee shall monitor all volumes of wastewater leaving the facility.
3. 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 concurrently with Acute WET test
samples.
4. Chemicals to be monitored using an EPA-approved method equivalent to the detection levels obtainable
by Method 624 and 625 or better, as follows:
•2,4-Dinitrophenol,
•2-Chloroethylvinyl ether,
•3,3-Dichlorobenzidine,
•4,6-Dinitro-2-methylphenol,
•4-Nitrophenol,
•Acrolein,
•Acrylonitrile,
•Benzidine,
•Hexachlorocyclopentadine,
•Pentachlorophenol,
•Toluene,
•Bis(2-Ethylhexyl)Phthalate,
•Ethylbenzene, and
•Xylenes
Part I, Page 3 of 9

Permit NC0085979
Condition: The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (2.) ACUTE TOXICITY MONITORING (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a Ouarterlv basis using protocols defined in the
North Carolina Procedure Document entitled"Pass/Fail Methodology For Determining Acute Toxicity
In A Single Effluent Concentration" (Revised December 2010, 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). The tests will be performed during the
months of January,April,July,and October.These months signify the first month of each three-
month toxicity testing quarter assigned to the facility. Effluent sampling for thi t sting must be
obtained during representative effluent discharge shall be performed at the ES permitted
final effluent discharge below all treatment process .
Should any single quarterly monito ' 1 indicate a it re'tQ mee �pEcified limits,then monthly
monitoring will begin immediate t til s•c time t at a single test is jassed.Upon passing,this
monthly test requirement will reve t qu •rly in the mont s s ecified above.
All toxicity testing res,, uir • it I ,;,; ion will be entered electronically using
the Division's eDMR s s�t n for the o th i t '.L: erformed usingthe parameter code
Y P �
TGE6C. Additionally,DWR Form AT-2 (original)is to be sent to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature.
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
Part I, Page 4 of 9

Permit NC0085979
report with the notation of"No Flow"in the comment area of the form. The report shall be submitted
to the Water Sciences Section at the address cited above.
Part I, Page 5 of 9

Permit NC0085979
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. Assessment of
toxicity compliance is based on the toxicity testing quarter, which is the three-month time interval that
begins on the first day of the month in which toxicity testing is required by this permit and continues
until the final day of the third month.
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Resources 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.
USE OF A DIFFERENT TEST ORGANISM
The permittee may request the use of : •• rent test ‘r : upo cumentation that the alternate
test organism would provide an • . or a ter leve o • • tion ndls appropriate based on the
characteristics of the discharge and r- -'ving s eam. S doc - - tion would consist of one of the
following:
1. For saltwater clas ' stre , fa d 'Min ay be assigned as the acute testing species
if the salinity of the receiving stream at the point of discharge is <5 ppt throughout the tidally
influenced cycle. This determination may be based on the best professional judgment of DWQ
staff or data collection provided by the permittee and approved by DWQ staff. This evaluation
should include vertical profiles of salinity/conductivity measurements at both high tide and low
tide over several 24-hr cycles.
2. Three consecutive "side-by-side" tests with results indicating that the alternate test organism is
as or more sensitive to the facility's effluent. Each test series would consist of two separate
toxicity tests conducted on the same sample of effluent with the length of exposure specified by
the permit,the only difference between the tests being the organism used.
3. An alternate plan developed by the permittee and approved by the Aquatic Toxicology Unit that
demonstrates an equal level of protection is offered by the test organism.
For items 2 and 3, it must also be demonstrated that viable and standardized culture techniques are
available for that organism and standardized testing methodologies have been developed and validated.
This demonstration should meet guidance provided by EPA in Section 6 of EPA-821-R-02-012, Short
Term Methods for Estimating the Acute Toxicity of Effluents and Receiving Waters to Freshwater
Organisms. Fifth Edition, 2002. Requests to use a different test organism and supporting
documentation should be sent to NC DWQ, ESS at the address listed above.
Part I, Page 6 of 9

Permit NC0085979
A. (3.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on
December 21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit(Standard Conditions for NPDES Permits):
• Section B.(11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D.(2.)and Section E.(5.)(a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be s arized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. The eDMR system may be
accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting requirements may
p �' p g
be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3)
or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the
following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
See"How to Request a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month following
the issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports;and
Part I, Page 7 of 9

Permit NC0085979
• Clean Water Act(CWA)Section 316(b)Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see"How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the permittee must identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's website resources to identify
the initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program)that is the designated
entity for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be ay. lable as 1 In ation PA's NPDES
Electronic Reporting Rule is found at:
p.
https://www.federalregister.gov/documents/201 I t /2015- 4/national- utant-discharge-
elimination-s stem-n ides-electronic-e!ortin.-ru -
Electronic submissions must start the a es list-a S ai - "' - •orting Requirements" section
above.
/"-------'-- \
3. How to Request a Wa' er rom Electro c epo :i
\ \\\
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers must be submitted in writing to
the Division for written approval at least sixty(60) days prior to the date the facility would be
required under this permit to begin submitting monitoring data and reports. The duration of a
temporary waiver shall not exceed 5 years and shall thereupon expire. At such time,monitoring
data and reports shall be submitted electronically to the Division unless the permittee re-applies for
and is granted a new temporary electronic reporting waiver by the Division. Approved electronic
reporting waivers are not transferrable. Only permittees with an approved reporting waiver request
may submit monitoring data and reports on paper to the Division for the period that the approved
reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements[Supplements Section B.(11.)(b)and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II, Section B. (11.)(a)or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(b). A person, and not a position,must be delegated signatory authority for eDMR
reporting purposes.
Part I, Page 8 of 9

Permit NC0085979
For eDMR submissions,the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North
Carolina's eDMR system,registering for eDMR and obtaining an eDMR user account,please visit
the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall
make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF
CERTIFICATION WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
\)(\5. Records Retention ISupplements Section D.(6.)1
The permittee shall retain records of all Discharge Monito ,inclui' _eDMR submissions. These records
or copies shall be maintained for a period of at least 3 years m to of th.r- 'rt. This period may be extended
by request of the Director at any time*CFR 122.41].
Part I, Page 9 of 9

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Rosman Maintenance Facility Location
i (not to scale)
Latitude: 35°08'56" Sub-Basin: 04-03-01
Longitude: 82°47'57" Stream Class: C-Trout
Quad#: G7NE/Rosman Permitted Flow: 0.0288 MGD
Receiving Stream: French Broad River North NPDES Permit NC0085979
Transylvania County
1