NC0089265_Draft Permit_20190612

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Laura Neely, Town Manager
Town of Dodson
PO Box 351
Dodson, North Carolina, 27017
Dear Ms. Neely:
NORTH CAROLINA
Environmental (2uallty
June 12, 2019
Subject: Review of Permit DRAFT
NPDES NC0089265, Class PCNC
Dodson Water Treatment Plant (WTP)
2604 Prison Camp Road, Dodson
Surry County
Based on your renewal request for the subject permit (dated December 31, 2018), the Division of Water
Resources (DWR or the Division) hereby transmits a renewal draft for your review and comment. Please
review it carefully to ensure your understanding of the permit limits and monitoring requirements, and to
correct errors, if any.
Facility Upgrades and Outfall Relocation. DWR understands that the Town of Dobson (Dobson) has
awarded a contract to J. S. Haren Company to upgrade WTP solids -handling facilities, estimated to have
commenced during first quarter of 2019. DWR has to date received no progress report (previous permit
compliance deadline April 1, 2017). In addition, Dobson has pledged since 2015 to fund and extend
Outfall 001 to the main -stem Fisher River (— 300 feet downstream). We anticipate your allocation of
funding and completion of this project.
Reasons Dobson Should Extend Outfall 001 to the Fisher River.
1. The unnamed tributary (UT) affords no effluent dilution because the instream waste
concentration (IWC) = 100%, i.e., the discharge comprises 100% of the stream flow.
2. Fishing River affords ample dilution [IWC — 0.65%] for metals & WET -testing.
3. WET -testing has not passed at the UT but has passed at main stem (14 quarterly tests)
4. Total Copper (Cu) requires permit limits for this renewal based on RP analysis.
5. Effluent discharged at the main stem (with dilution) will likely pass new permit limits for Cu.
6. Continued discharge to the UT will require future treatment for Cu.
Finally, resolving the above issues and their potential non-compliance will qualify Dobson for -a
Certificate of Coverage (COC) under WTP General Permit NCG590000.
Eligibility for General Permit NCG590000. In August 2014, the Division implemented NPDES General
Permit NCG590000 (NCG59) as less restrictive for WTPs like Dobson utilizing Greensand and
Conventional -type treatment technologies to produce potable water. The Certificate of Coverage (COC)
annual fee for NCG59 is $100 [verses $860 for an individual permit], and monitoring is less frequent [see
enclosed permit NCG59]. Please note NCG591s Tables B. (1.) and B. (3.) showing requirements
specific to the Dobson's facility. In applying for the general permit, Dobson should formally request to
rescind current permit NC0089265. See our website.
[http://portal.ncdenr.org/web/wq/swp/ps/npdes/gencralpermits].
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mad Service Center I Raleigh, North Carolina 27699-1617 — 919.707.9000

Laura Neely, Town Manager
Town of Dobson
Permit Renewal - Draft Review
Page 2 of 2
Whole Effluent Toxicity (WET) - TestingHistory. Dobson's WET -testing results reported for the
previous permit cycle indicate all quarterly tests "Fail" [8 calendar quarters]. Again, this resulted
from no effluent dilution afforded at the UT to Fisher River [zero flow receiving -stream conditions;
7Q10 and 30Q2 = 0.0 cfs].
Changes for Renewal — WET -Testing "Limited." Renewal WET -Testing at the UT stipulates an
effluent concentration of 90% and "monitoring only" is hereby stipulated as WET -test "Limited" [see
Section A. (2.)]. Any test "failure" at the UT moving forward exposes Dobson to stipulated penalty
assessment. Only after moving Outfall 001 may Dobson take advantage of dilution (0.65%) afforded by
Fisher River's main stem [see WET -Test Section A. (3.)].
Concurrent with this notification, the Division will solicit public comment on this draft by
publishing a notice in newspapers having circulation in the general Surry County area, as required
by the NPDES Program. Please provide your written comments, if any, to DENR / DWR /
NPDES Program no later July 1, 2019 (approximately 30 days after receiving this document).
Your written comments are welcome but are not mandatory,
Following the mandatory 45-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 me, Joe R. Corporon, P.G. at fioe.corporonAncdenngov] or call my direct
line 919-707-3617.
Joe R. Cofporon, P G
DEQ / PWR / NPDES Permitting Unit
Enclosure: NPDES Permit NCO021 "I"renewal draft)
Attachments: WTP General Permit NCG590000
ec: DVAM-SRO, Lon Snider (Supervisor)
NPDES Program Files
DWR/ATB, Susan Meadows
DWR/OCU, Maureen Kinney

Permit NCO089265
WTP Class PCNC
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 provisions 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 Contro\tact, as amended, the
Town o
is hereby authorized to discharge
Dobson W,
Sun
\�
to receiving waters' de is g s an un is-med�
River Basin in a cc or&nce witiefflu nt limitati
forth in Parts I, II, III`and IV hereof\\
This permit shall become
a
bson
at the
to Fisher River in the Yadkin -Pee Dee
ng requirements, and other conditions set
2019.
This permit and authorization to discharge shall expire at midnight on December 31, 2023.
Signed this day.
Linda Culpepper, Director -
Division of Water Quality
By Authority of -the Env,IronmentalManagement Commission

Permit NCO089265
WTP Class PCNC
SUPPLEMENT TO PERMIT COVER SHEET
As of this permit issuance, any previously issued permit bearing this number is no longer effective. All
previous NPDES Permits issued to this facility, whether for operation or discharge, are hereby
revoked. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
The Town of Dobson
is hereby authorized to:
1. continue to operate wastewater -treatment facilities-to\}i odbce. otabie water employing
conventional treatment technology [coagulati0 jflocc�latio\ssedimentation, filtration and
disinfection] to treat raw surface water at a design flow of 0.066 I IUD, generating a
wastewater discharge at 0.015 MGD [highest 7thly a erage], utilizing facilities
consisting of; � \X
• pond - raw -water impoundment [ae
• flash mixing tank [additive — alum;
• flocculation tank
• sedimentation
• filter backwash/rewasl"`usin pots.
• chIorina o�flondizati6
these facilities located at the Dob
2. prior to relocating \\the\outfall,
discharge from said treatment
map, to an unnamed tribu�
currently classified C water
'Dee River Basin; and
- copper\:�ulfate]
Road, Dobson, Surry County; and
inky o�mpliance with WET -Testing [Part I, Section (A. (2.)],
works via Outfall 001, at the location specified on the attached
.(UT) to Fisher River [stream segment 12-63-(9)], a waterbody
vithin subbasin 03-07-02 [HUC 03040101] of the Yadkin -Pee
3. after relocating the outfall, in compliance with WET -testing [Part I, Section (A. (1)], discharge
from said treatment works via Outfall 001 to the main -stem Fisher River; stream segment 12-
63-(9)], a waterbody currently classified C waters within subbasin 03-07-02 [HUC: 03040101]
of the Yadkin -Pee Dee River Basin.
Page 2 of 8

Permit NCO089265
WTP Class PCNC
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq.; 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge conventional WTP wastewater from Outfall 001. Such discharges
shall be limited, monitored, and reported 1 by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
(PARAMETER CODES)
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow (MGD)
50050
�lt�stanf eous
Recording
Effluent
Total Suspended Solids
00530
30.0 mg/L
45,0 L,
�2/Month
Grab
Effluent
pH 3 (standard units)
00400
Not < 6.0 or >C9.0 S.t v
24o\nth
Grab
Effluent
Total Residual Chlorine 2
50060
\l� µ\g/I
\ 2/Month\
Grab
Effluent
Turbidity
00070
\�
50N TU�
\4Month
Grab'
Effluent
Hardness (as CaCO3)
00900
\��
\\
Monthly
)/Grab
Effluent
Total Copper
/01042
\7.88 µg2\
�10 47,�g/L
\\I�onthly
Grab
Effluent
Aluminum
\Oi 105
//\�
Quarterly
Grab
Effluent
Total Fluoride, mg/ L��
\ 0095�\
1
\�
;Quarterly
Grab
Effluent
Total Nitrogen 3mg/L, \
\C0660�
�\
\�
Quarterly
Grab
Effluent
Total Phosphorus (mg/L{)\
C0665\
\\ �,
�J\
Quarterly
Grab
Effluent*
Whole Effluent Toxicity \
WET Chronic 4
TGP3B
„ . v
\�imited
Quarterly
Grab
Effluent
Footnotes:
1. The Permittee shall submit discharge Monitoring Reports electronically using DWR's eDMR
submittal system [See Section A. (4.)].
2. Limit and monitoring apply only if facility adds chlorine or chlorine derivatives to filter backwash
water. The Division shall consider compliant all effluent TRC values reported below 50µg/L.
However, the Permittee shall continue to submit all values reported by North Carolina -certified
test methods (including field certified), even if these values fall below 50µg/L.
3. TN = (NO2-N + NO3-N) + TKN, where (NO2-N + NO3-N) and TKN are Nitrite/Nitrate nitrogen
and Total Kjeldahl Nitrogen respectively.
4. WET -Testing 7-Day Chronic Pass/Fail — effluent test concentration depends on outfall location
[see sections A. (2) and A. (3.)] at respective 90% or 0.65% using Ceriodaphnia dubia, monitoring
during February, May, August, and November.
Condition: The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
Page 3 of 8

Permit NCO089265
WTP Class PCNC
A. (2.) CHRONIC TOXICITY 7-DAY PASS/FAIL - LIMITED
[15A NCAC 02B .0200 et seq.]; for discharges to the UT of Fisher River.
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent
versions or "North Carolina Phase H Chronic Whole Effluent Toxicity Test Procedure" (Revised- December
2010) or subsequent versions. The tests will be performed during the months of February, May, August,
and November These months signify the first month of each three-month toxicity testing quarter assigned to
the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and
shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter
permit limit, then multiple -concentration testing shall be perforn
following months, as described in "North Carolina Phase II ChroXn
(Revised -December 2010) or subsequent versions. 1/2�
All toxicity testing results required as part of this permitcoriditi
Monitoring Form (MR-1) for the months in which tests were pe
the pass/fail results and TBP3B for the Chronic Value. Addit (
to the following address: ��
Attention:
Completed Aquatic Toxicii Test I
after the end of the e `rt gm per�oc
all supporting chemical/physical in
laboratory supervisor and�ORC or,
sample must be measured\q po
Should there be no discharge offlo
the permittee will complete the�infc
the facility name, permit number, p
"No Flow" in the comment area of
address cited above.
Wa1
162
esul"ts_i, failure or a ChV below the
a minimum, in each of the two
ole Effluent Toxicity Test Procedure"
ill be entered on the Effluent Discharge
ed, using the parameter code TGP313 for
\WR Form,�AT,-3 (original) is to be sent
IUGM
Water
Branch
filed with the Watei•,Sciences Section no later than 30 days
report is mde. Tested to shall be complete, accurate, include
r'a all\ ncen}trati�on/response data, and be certified by
;na e,signature/Total residual chlorine of the effluent toxicity
his emnlovec(for disinfection of the waste stream.
rcility-during a month in which toxicity monitoring is required,
tte6t the top of the aquatic toxicity (AT) test form indicating
county, and the month/year of the report with the notation of
ie report shall be submitted to the Water Sciences Section at the
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. 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 this monitoring requirement 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, minimum control organism reproduction, 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.
Page 4 of 8

Permit NCO089265
WTP Class PCNC
A. (3.) CHRONIC TOXICITY 7-DAY PASS/FAIL - LIMITED
[15A NCAC 02B .0200 et seq.]; for discharges to the Fisher River main stem.
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 0.65 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December
2010) or subsequent versions. The tests will be performed during the months of February, May, August,
and November These months signify the first month of each three-month toxicity testing quarter assigned to
the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and
shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter resultsa a failure or a ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months, as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -December 2010) or subsequent versions. �� ��
All toxicity testing results required as part of this permi co dition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using fh\e parameter code TGP3B for
the pass/fail results and THP3B for the Chroni Value. Additionally�DWR Forms T-3 (original) is to be sent
to the following address: \ \ � \ �\
Attention:
Wdl
162
162
Water
Branch
Completed Aquatic Toxicity Test Form�shall� be filed with the Water\Sciences Section no later than 30 days
after the end of the rdportm period\for which &,report is made. Testld to shall be complete, accurate, include
all supporting chemical%physicalmea`suremens as nd all-concentrat�on/response data, and be certified by
laboratory supervisor and ORC or approved�designate-s\gnature!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 from t\ i facil y 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 tle�form/The report shall be submitted to the Water Sciences Section at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. 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 this monitoring requirement 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, minimum control organism reproduction, 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.
Page 5 of 8

Permit NCO089265
WTP Class PCNC
A. (4.) 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):
1.
• Section B. (11.) Signatory Requirements
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Reporting
Records Retention
Monitoring Reports
The permittee shall report discharge monitoring data
Electronic Discharge Monitoring Report (eDMR) int
Monitoring results obtained during the previo��mon
submitted electronically using eD Vn.. The eDMR s:
monitoring data and submit�DMRs electronicall'y\�us�.
eDMR application is-complia` t with EPA's Cross-1Vl
(CROMERR),,h ittees will be required o submi �
electronicalh/.usmiz eDMR�andwill be�reauired to cc
signing, and subfh
following address:
NC DEQ / Division of W,at
ATTENTION: Central Fit,
1617 Mail Service Center
Raleigh, North Carolina 27
and Secdon`E�(Q (a)1
troi,n,cally using the NC DWR's
iet application. �
s\ la l\be summarized f r each month and
Im allows,,permitted facilities to enter
the internet�-IIntil such time that the state's
iale`ctroriic Reporting Regulation
discharge monitoring data to the state
)lete the eDMR submission by printing,
3f the computer printed eDMR to the
Quality Permitting Section
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 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 mailing address above. 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, 2020, the permittee must electronically report
the following compliance monitoring data and reports, when applicable:
Page 6 of 8

Permit NC0089265
WTP Class PCNC
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• 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 NPDE
entity (EPA or the state authorized by EPA to implementihP,
designated entity for receiving electronic NPDES data [see,40
EPA plans to establish a website that will also Ifnk\to the apI
each type of electronic submission and for each state\Instr'u
appropriate electronic reporting tool will'be available\ swel]
Electronic Reporting Rule is found at: <
Electronic submissions
above.
dates
xlated facilities means the
S program) that is the
127.2(b)].
te�l \ tronic reporting tool for
on hhow to access and use the
rma_t neon EPA's NPDES
Requirements" section
The permittee may` eek a temporary el `tronic'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\tempor�ry elec6 n c reporting waivers must be submitted in writing to
the Division for written approval at lest sixty (60) days prior to the date the facility would be
required under this permit t�begin submitting monitoring data and reports. The duration of a
�. -� 1,
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:
hgp:Hdeq.nc.gov/about/divisions/water-resources/edinr
Page 7 of 8

Permit NC0089265
WTP Class PCNC
4. Signatory Requirements [Supplements Section B. (11.) (b) & Supersedes Section B. (11.) (d)1
5.
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II, Section B. (I 1.)(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.
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:
htt:/p /deq.ne.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an ele
make the following certification [40 CFR 1,
CERTIFICATION WILL BE ACCEPTED:
"I certify, under penalty of law, that this doe'
direction or supervision in accordance with
properly gather and evaluate-the-informatio;
persons who manage thesY-�Stem orthose pe
information, the informatioNubmitted\is, to
and complete. I am -aware thate sigy
.there a
including the ,ossi'bility,offiges�and i ��irisc
Egging the state's eDMR system shall
OTHER STATEMENTS OF
:hments wereprgpared under my
to assure that�qualified personnel
`on my inquiry of the person or
onsible for gathering the
wledge and belief, true, accurate,
w4ubmitting false information,
violations. "
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These record\or copies shall'be maintained for a period of at least 3 years from the
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41]. �
Page 8 of 8 _-

°
t
Fisher River `
(flows E)
O
I ° ■
lJtNN-e Ho 4��'N�ji
Prison Camp
• (NCSR 1345)
10 e
if
l • j
• ° 4
•
O��I /-�-1j1}� •
■+ i
• t
f
' Main Street
1/ w r ■
(BUS Hwy 601)
19
heat-er—A
O ll
a
/ •r
r
•
O
Little Fisher River
(flows E)
►1
!1
• i /00 p --
1
r
Outfall001
ur (� (Flows NW)
►E
Town
of Dodson
Dodson WTP
Drainage Basin:
Yadkin - Pee Dee
Receiving Stream: UT to Fisher River
Latitude:
36' 24' 49" N
State Grid/USGS: B16NW / Dodson, NC
Longitude:
80' 43' 16" W
Stream Segment: 12-63-(9)
Stream Class:
C
HUC: 03040101
Sub -Basin:
03-07-02
North NPDES Permit NCO089265
SUrry County