NC0089290_Permit Issuance_20170419

Water Resources
ENVIRONMENTAL QUALITY
April 19, 2017
Ms. Christine Bralley
Town of Mocksville
171 Clement Street
Mocksville, NC 27028
ROY COOPER
Gown,.'
MICHAEL S. REGAN
Semtfv)
S. JAY ZIMMERMAN
Subject: Issuance of NPDES Permit NCO089290
Hugh A. Lagle WTP
Class PC-1
Davie County
Dear Ms. Bralley:
Direclo,'
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 October 15, 2007 (or as subsequently amended).
The draft permit includes the following significant changes from the existing permit:
➢ Section A. (3) has been updated to reflect current language regarding electronic submission
of effluent data. Federal regulations require electronic submittal of all discharge
monitoring reports (DMRs).
➢ Regulatory citations have been added to the permit.
➢ Footnotes have been removed for sample location and flow.
➢ Footnotes have been added for fluoride and ammonia nitrogen.
➢ Footnotes have been updated for total residual chlorine (TRC) and zinc.
➢ Monthly turbidity monitoring has been removed, and changed to 2/month.
➢ pH limits have been changed from >_ 6.0 SU >_ 9.0 SU to >_ 6.0 SU and <_ 9.0 SU.
➢ Total hardness sampling has been added.
➢ Parameter codes have been added
➢ Description of the treatment process has been amended. Sedimentation tanks have been
removed and a flow meter was added.
➢ Footnotes addressing the use of Monitoring Coalitions for instream hardness testing have
been added.
Please note that Bear Creek is listed as an impaired waterbody on the North Carolina 303(d)
Impaired Waters List. Addressing impaired waters is a high priority with the Division, and
instream data will continue to be evaluated. If there is noncompliance with permitted effluent
Emits and stream impairment can be attributed to your facility, then mitigative measures may be
required.
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, NC 27699-1617
919 807 6300 919-807-6389 FAX
https:lldeq.nc.govlaboutldivisionslwater-resourcestwater-resources-permitstwastewater-bmchlnpdes-wastewater-permits

If any parts, measurement frequencies or sampling requirements contained in this permit 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 in the form of a written
petition, conforming 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 any other Federal, State, or Local governmental permit
that may be required. If you have any questions concerning this permit, please contact Anjali B.
Orlando at telephone number [phone] or aniali.orlando(@ncdenr.gov.
inc rely,
S. Jay Zimmerman, P. .
Director, Division of Water Resources
cc: NPDES Unit
Winston-Salem Regional Office
Central Files

Permit NCO089290
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
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 Water Pollution Control Act, as amended, the
Town of Mocksville
is hereby authorized to discharge wastewater from a facility located at the
Hugh A. Lagle WTP
771 Sanford Avenue
Mocksville
Davie County
to receiving waters designated as an unnamed tributary to Bear Creek in the Yadkin Pee Dee River
Basin
in accordance with effluent limitations, monitoring requirements, and applicable conditions set forth in
Parts I, II, III and IV hereof.
This permit shall become effective on June 1, 2017.
This permit and authorization to discharge shall expire at midnight on December 31, 2021.
Signed this day April 24, 2017.
G
y Zimmerman, P.G.
irector, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

Permit NCO089290
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.
The Town of Mocksville is hereby authorized to:
1. Continue to operate a conventional water treatment plant with a discharge of filter -backwash,
sediment basin flush and untreated raw water.
This conventional water treatment plant has a design potable flowrate of 2.0 MGD and a monthly
average wastewater discharge of 0.0675 MGD. The facility is located at Mocksville's Hugh A. Lagle
WTP (771 Sanford Avenue, Mocksville) in Davie County, and includes the following components:
• Two 250,000 gallon flow equalization tanks
• Dechlorination
• Flow Meter
2. Discharge from said treatment works at the location specified on the attached map into an unnamed
. tributary to Bear Creek, classified WS-IV waters in the Yadkin Pee Dee River Basin.
Paget of

Permit NCO089290
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[I 5A NCAC 02B.0400 et seq., 15A NCAC 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 from outfall 001. Such discharges shall be limited and monitored 1 by the Permittee as
specified below:
E IJENM
LIMITS 2
M( ORiNC -RE UIRLM NTS,
AR�GTE�tISTICS,
x
Monhl y
y
`1Viesurei�nenf
Sale a
.�i._ T.
S.3�llIeadrt
_
Avers e.
aamnum`r:
iienCY
Flow 50050
Continuous
Recording
Effluent
Total Suspended
Solids
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
H 00400
>_ 6.0 SU and
< 9.0 SU
2/ Month
Grab
Effluent
Total Residual
ChlorineChlorinne 50060
17 µg/L
2/ Month
Grab
Effluent
Turbidity 00076
2/ Month
Grab
Effluent
Total Iron 01045
Quagerly
Grab
Effluent
Total Copper 01042
Quarterly
Grab
Effluent
Manganese 01055
Quarterly
Grab
Effluent
Fluoride3 00951
rly
Grab
Effluent
Total Zinc 4 01092
Quarterly
Grab
Effluent
Aluminum 01105
Quarterly
Grab
Effluent
Ammonia C0610
Nitrogens
Quarterly
Grab
Effluent
Total Nitroo C0600
Quarterly
Grab
Effluent
Total C0665
Phosphorus
Quarterly
Grab
Effluent
Harness — Total as [CaCO3
or Ca + M 7
Quarterly
Grab
Effluent
Harness —Total as [CaCO3
or Ca + M) s
Quarterly
Grab
Upstream
Whole Effluent Toxicity
Monitoring?
Quarterly
Grab
Effiuent
rootnotes:
1. The permittee shall begin submitting discharge monitoring reports electronically using the Division's eDMR system
[see A. (3)].
2. Limit and monitoring requirements apply only if the facility adds chlorine or chlorine derivatives to water that is
eventually discharged. The Division shall consider all effluent TRC values reported below 50 µg/ L to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a
North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/ L.
3. Fluoride should be monitored if the Permittee backwashes with fluoridated finished water.
4. Zinc should be monitored if the Permittee adds zinc orthophosphate as a corrosion inhibitor prior to backwashing.
5. Ammonia Nitrogen should be monitored if the Permittee uses chloramines (adds ammonia to chlorinated water) for
secondary disinfection prior to backwashing.
6. Total Nitrogen (TN) = (NO2-N + NO3-N) + TKN where NO2-N and NO3-N are Nitrite and Nitrate Nitrogen,
respectively and TKN is Total Kjeldahl Nitrogen.
7. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals
(cadmium, copper, lead, nickel, silver, and zinc).
Page 3 of 7

Permit NCO089290
8. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream. If the Permittee is a member of the Monitoring Coalition
Program, sampling for instream hardness may be waived as long as the Monitoring Coalition agrees to sample
hardness at the nearest upstream location, at a minimum frequency of quarterly, and the Permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge. The Permittee is responsible for submitting instream
hardness test results with its permit renewal application package. If Coalition membership is cancelled, or if the
Coalition terminates instream hardness sampling at the approved station, the Permittee will immediately notify the
Division and resume sampling for instream hardness, upstream of its discharge.
9. Whole Effluent Toxicity Monitoring (Ceriodaphnia dubia) at 90%; March, June, September and December; refer to
Special Condition A. (2.).
All samples must be collected from a typical discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) CHRONIC TOXICITY PASS/FAIL MONITORING (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct guarterly chronic toxicity tests using test procedures outlined in the "North Carolina
Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent versions.
The effluent concentration defined as treatment two in the procedure document is 90%. The testing shall be
performed as a Ceriodaphnia dubia 7-day pass/fail test. The tests will be performed during the months of March,
June, September and December. 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.
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 TGP3B.
Additionally, DWR Form AT-1 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental 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 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 Section at
the address cited above.
Page 4 of 7

Permit NCO089290
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly
monitoring will begin immediately. Upon submission of a valid test, this monthly test requirement will revert to
quarterly in the months specified above.
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.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms
submitted.
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.
A. (3.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 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)l
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 summarized 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. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DENR / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Page 5 of 7

Permit NCO089290
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:
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 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 available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: http://www2.gpa.gov/compliance/final-national-pollutant-
discharge-elimination-system-npdes-electronic-reporting rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reporting
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
Page 6 of 7

Permit NCO089290
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:
hM://deg.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
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. (I 1.)(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:
httyT://d_eq.nc. jzov/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:
7 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 [Supplements Section D. (6.)l
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records 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 7of7

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64 IN
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outfall 001 r
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Latitude: 35. 53' 2T' p n ^ (� Longitude: 80. 34'43" NCOO89290
Quad N D16NFl MocksviHe
stream Class: WS-IV
Facility
Location
Subbasin: 03 07 06 Town of Mocksville
HUC: 030401020603
Receiving Stream: UT to Bear Creek Hugh A. Lagle WTP
(not to scare)
Davie County
Basin Yadkin
River Basin
North

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require
full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile
home parks, etc) that can be administratively renewed with minor changes, but can include
facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing,
instream monitoring, compliance concerns).
Basic Information for Expedited Permit Renewals
Permit Writer/Date
Brianna Young 2/27/17/An'ali Orlando
Permit Number
NCO089290
Facility Name
Hugh A. La le WTP
Basin Name/Sub-basin number
Yadkin Pee Dee 03-07-06
Receiving Stream
UT to Bear Creek
Stream Classification in Permit
W S-IV
Does permit need Daily Max NH3 limits?
No
Does permit need TRC limits/language?
Already resent - Updated
Does permit have toxicity testing?
Yes
Does permit have Special Conditions?
Yes — Chronic toxicity monitoring
Does permit have instream monitoring?
No
Is the stream impaired (on 303(d) list)?
Yes - Copper
Any obvious compliance concerns?
No
-Any permit mods since last permit?
No
Current expiration date
12/31/2016
New expiration date
12/31/2021
Comments received on Draft Permit?
Yes
• eDMR language updated in footnotes and Section A. (3.)
• Regulatory citations added
• Sample location footnote removed
• Removed footnote - Limits, including the requirement for continuous flow recording
become effective December 1, 2015, or upon completion of the wastewater treatment
facilities, whichever comes first. Instantaneous flow estimates and discharge duration
shall be recorded until the flowmeter is operational. Upon completion of construction of
wastewater treatment facilities, the Town shall notify the Winston-Salem Regional Office
of DENR at [phone], and the Central Office of the Division of Water Resources,
NPDES Permitting Unit at [phone]. All limits become effective the first of the
next month. Monitoring is required beginning on the effective date of this permit.
• Removed footnote requiring metals testing in conjunction with toxicity testing.
• Updated TRC footnote, zinc footnote, eDMR footnote
• Added fluoride footnote
• Added ammonia nitrogen footnote
• Removed monthly turbidity monitoring
• Changed pH from > 6.0 SU > 9.0 SU to > 6.0 SU and < 9.0 SU
• Total hardness sampling added
• Parameter codes added
• Added to Footnote #8. "The Permittee shall sample instream hardness, upstream of the
facility's discharge. The sample shall be representative of the hardness in the receiving
stream. If the Permittee is a member of the Monitoring Coalition Program, sampling for
instream hardness may be waived as long as the Monitoring Coalition agrees to sample
hardness at the nearest upstream location, at a minimum frequency of quarterly, and the
Permittee has obtained approval from DWR NPDES Permitting Unit that the upstream

station being monitored by the Coalition is representative of the receiving stream for this
discharge. The Permittee is responsible for submitting instream hardness test results with
its permit renewal application package. If Coalition membership is cancelled of the
Coalition terminates instream hardness sampling at the approved station, the Permittee
will immediately notify the Division and resume sampling for instream hardness,
upstream of its discharge."
Description of the treatment process has been amended. Sedimentation tanks have been
removed and a flow meter was added.
Most Commonly Used Expedited Language:
• 303(d) language for Draft/Final Cover Letters: "Please note that the receiving stream
is listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List.
Addressing impaired waters is a high priority with the Division, and instream data will
continue to be evaluated. If there. is noncompliance with permitted effluent limits and
stream impairment can be attributed to your facility, then mitigative measures may be
required".
TRC language for Comuliance Level for Cover Letters/Effluent Sheet Footnote:
"The Division shall consider all effluent TRC values reported below 50 µg/L to be in
compliance with the permit. However, the Permittee shall continue to record and submit
all values reported by a North Carolina certified laboratory (including field certified),
even if these values fall below 50 µg/L."
Comments received from Heather Adams of Envirolink on March 16, 2017
and responses listed below each comment.
1. In the description, the sedimentation tanks are part of the water plant process and not the
wastewater treatment process. The 2 EQ tanks are part of the wastewater treatment
process (solids are allowed to settle and the clear water is decanted to the discharge
point) along with dichlorination and a flow meter.
The description section of the permit regarding the treatment process has been
changed as noted. We have removed the listing of sedimentation tanks, and added a
flow meter listing.
2. The first page of the letter states that monthly turbidity monitoring has been removed
however, turbidity monitoring is still included in the draft A.1 Effluent Limitations and
Monitoring Requirements.
Regarding turbidity monitoring, the A.1 Effluent Limitations and Monitoring
Requirements table in the draft is correct, and the first page of the letter should have
stated "2/month" instead of "monthly". As per Table 3.1 of the Monitoring
Requirements for Conventional WTPs in the 2009 NPDES Permitting Strategies for
Potable Water Treatment Plant Standards, turbidity monitoring shall be performed
2/month if the discharge is less than 0.5 MGD and weekly if the discharge is greater
than or equal to 0.5 MGD. Since the monthly average wastewater discharge for the
Town of Mocksville WTP is 0.0675 MGD, turbidity monitoring shall be performed
2/month.
3. In regards to the footnote for instream Hardness testing: I have seen it written in other
permits that the Discharger may seek a waiver from the Division if the Coalition agrees

to sample at the nearest upstream location and samples at least quarterly. If the
membership is canceled then the Discharger becomes responsible for collecting the
instream hardness sample. We were just wondering if this footnote can be edited to allow
the Coalition to handle this as long as all parties are in agreement.
- Footnote #8 which pertains to instream hardness has been changed to reflect the
updated wording regarding Monitoring Coalition Programs.
The footnote now reads:
"The Permittee shall sample instream hardness, upstream of the facility's discharge.
The sample shall be representative of the hardness in the receiving stream. If the Permittee
is a member of the Monitoring Coalition Program, sampling for instream hardness may be
waived, as long as the Monitoring Coalition agrees to sample hardness at the nearest
upstream location, at a minimum frequency of quarterly, and the Permittee has obtained
approval from DWR -NPDES Permitting Unit that the upstream station being monitored
by the Coalition is representative of the receiving stream for this discharge. The Permittee
is responsible for submitting instream hardness test results with its permit renewal
application package. If Coalition membership is cancelled or the Coalition terminates
instream hardness sampling at the approved station, the Permittee will immediately notify
the Division and resume sampling for instream hardness, upstream of its discharge."

Orlando, Anjali
From:
Mitchell, Patrick
Sent:
Monday, April 03, 2017 10:47 AM
To:
Orlando, Anjali
Subject:
FW: Town of Mocksville WTP NCO089290
Attachments:
D00031417-03142017104110.pdf
Anjali,
Comment #1 makes since to me. They are part of the treatment process. They are used to remove solids (settling) from
the water prior to discharge. I think it is ok to make this change.
Thanks,
Patrick
Patrick L. Mitchell, REHS, LSS
Water Quality Regional Operations Section
Division of Water Resources
NC Department of Environmental Quality
Phone: [phone]
Mobile: [phone]
Fax: [phone]
Winston-Salem Regional Office
450 W Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
!/ Nothing Compares,
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties unless the content is exempt by statute or other regulation.
From: Orlando, Anjali
Sent: Thursday, March 30, 2017 2:55 PM
To: Mitchell, Patrick <Patrick.Mitchell@NCDENR.¢ov>
Cc: Knight, Sherri <[e-mail]>; Smith, George <[e-mail]>
Subject: FW: Town of Mocksville WTP NCO089290
Hello Mr. Mitchell,
I wanted to ask about Comment #1 below from Heather Adams of Envirolink, Inc. and confirm that
these changes should be made to the draft NPDES permit for the Town of Mocksville WTP in the description
section of the permit.
I am new temporary Environmental Senior Specialist working in the Compliance and Expedited Unit
at DEQ, and was assigned this permit from Brianna Young, since it is in the final stages of the process.

I saw that you had reviewed the permit, and so I thought to ask you
if you might be able to provide some guidance regarding this change.
Thanks,
Anjali
Anjali Orlando
Environmental Senior Specialist -Temporary
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-807-6388
an iali.orlando(d).ncdenr. gov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617
Nc- -5> aMV Compam
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.
From: Heather Adams[mailto:[e-mail]
Sent: Thursday, March 16, 2017 12:20 PM
To: Young, Brianna A <[e-mail]>
Cc: Chuck Willis <[e-mail]>; Tom Johnson <[e-mail]>
Subject: Town of Mocksville WTP NC0089290
Brianna
Below are a few comments to the draft NPDES permit issued to the Town of Mocksville WTP on March 8, 2017:
1. In the description, the sedimentation tanks are part of the water plant process and not the wastewater
treatment process. The 2 EQ tanks are part of the wastewater treatment process (solids are allowed to settle
and the clear water is decanted to the discharge point) along with dichlorination and a flow meter.
2. The first page of the letter states that monthly turbidity monitoring has been removed however, turbidity
monitoring is still included in the draft A.1 Effluent Limitations and Monitoring Requirements.
In regards to the footnote for instream Hardness testing: I have seen it written in other permits that the
Discharger may seek a waiver from the Division if the Coalition agrees to sample at the nearest upstream
location and samples at least quarterly. If the membership is canceled then the Discharger becomes responsible
for collecting the instream hardness sample. We were just wondering if this footnote can be edited to allow the
Coalition to handle this as long as all parties are in agreement.
Thanks,
ll.at,% f41a^r

Director of Operations
Envirolink, Inc.
4700 Homewood Court Suite 108
Raleigh, NC 27609
919-827-4631
From: Kelsey Davidson[mailto:[e-mail]
Sent: Tuesday, March 14, 2017 1:33 PM
To: Heather Adams <[e-mail]>
Subject: FW: WTP Permit
I have also sent this to chuck. He asked that I send a copy to you and have you look over it.
Thanks
Kelsey Davidson
Town of Mocksville
Finance Assist. & Human Resources
E-mails sent to or from this e-mail address that relate to the Town of Mocksville are public records and may be
subject to public access under the North Carolina public records law, pursuant to N.C.G.S., Chapter 132 as
hereinafter amended.

Young, Brianna A
From: Mitchell, Patrick
Sent: Thursday, March 16, 2017 1:55 PM
To: Young, Brianna A
Cc: Smith, George; Knight, Sherri
Subject: RE: Draft NPDES permits for review
Brianna,
I have reviewed the draft permit for Hugh Lagle WTP Permit No. NC0089290. The permit looks good to go.
Thanks,
Patrick
Patrick L. Mitchell, REHS, LSS
Water Quality Regional Operations Section
Division of Water Resources
NC Department of Environmental Quality
Phone: [phone]
Mobile: [phone]
Fax: [phone]
Winston-Salem Regional Office
450 W Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
-�othling Compares.
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties unless the content is exempt by statute or other regulation.
From: Knight, Sherri
Sent: Wednesday, March 15, 2017 1:16 PM
To: Mitchell, Patrick <[e-mail]>; Xiao, Min <[e-mail]>
Cc: Smith, George <[e-mail]>
Subject: FW: Draft NPDES permits for review
Draft permits for water treatment plants in Davie and Guilford
From: Young, Brianna A
Sent: Thursday, March 09, 2017 1:34 PM
To: Knight, Sherri <[e-mail]>; Hudson, Eric <[e-mail]>
Subject: Draft NPDES permits for review
Good afternoon Sherri and Eric,

Please have your staff review the attached permit that went out to public notice this week. Please let me know if you
have any questions.
Thank you,
Brianna Young
Environmental Specialist
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-807-6333
Brianna.Young(a)ncdenr.cov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617
Nc- �i-NOthftV Compares .v..
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.

Young, Brianna A
From: Heather Adams < [e-mail] >
Sent: Thursday, March 16, 2017 12:20 PM
To: Young, Brianna A
Cc: Chuck Willis; Tom Johnson
Subject: Town of Mocksville WTP NC0089290
Attachments: D00031417-03142017104110.pdf
Brianna
Below are a few comments to the draft NPDES permit issued to the Town of Mocksville WTP on March 8, 2017:
1. In the description, the sedimentation tanks are part of the water plant process and not the wastewater
treatment process. The 2 EQ tanks are part of the wastewater treatment process (solids are allowed to settle
and the clear water is decanted to the discharge point) along with dichlorination and a flow meter.
2. The first page of the letter states that monthly turbidity monitoring has been removed however, turbidity
monitoring is still included in the draft A.1 Effluent Limitations and Monitoring Requirements.
3. In regards to the footnote for instream Hardness testing: I have seen it written in other permits that the
Discharger may seek a waiver from the Division if the Coalition agrees to sample at the nearest upstream
location and samples at least quarterly. If the membership is canceled then the Discharger becomes responsible
for collecting the instream hardness sample. We were just wondering if this footnote can be edited to allow the
Coalition to handle this as long as all parties are in agreement.
Thanks,
Director of Operations
Envirolink, Inc.
4700 Homewood Court Suite 108
Raleigh, NC 27609
919-827-4631
From: Kelsey Davidson [mailto:[e-mail]]
Sent: Tuesday, March 14, 2017 1:33 PM
To: Heather Adams <[e-mail]>
Subject: FW: WTP Permit
I have also sent this to chuck. He asked that I send a copy to you and have you look over it.
Thanks
Kelsey Davidson
Town of Mocksville
Finance Assist. & Human Resources
E-mails sent to or from this e-mail address that relate to the Town of Mocksville are public records and may be
subject to public access under the North Carolina public records law, pursuant to N.C.G.S., Chapter 132 as
hereinafter amended.

01
WoterResources
ENVIRONMENTAL OUALITY
March 8, 2017
MEMORANDUM
To: dsort
NC DEQ / DWR / Public Water Supply
Winston-Salem Regional Office
From: Brianna Young
NPDES Unit
Subject: Review of Draft NPDES Permit NCO089290
Hugh A. Lagle WTP
Davie County
ROY COOPER
Gairnmr
MICHAEL S. REGAN
Senn,
S. JAY ZIMMERMAN
Db—r.,
Please indicate below your agency's position or viewpoint on the draft permit and return this
form by April 8, 2017. If you have any questions on the draft permit, please contact me at
919-807-6388 or via e-mail [[e-mail]].
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained properly,
the stated effluent limits are met prior to discharge, and the discharge does not contravene the
designated water quality standards.
❑ Concurs with issuance of the above permit, provided the following conditions are met:
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached:
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Curter I Raleigh, NC 27699-1617
919 807 6300 919.907.6389 FAX
https://deq.nc.gov/abnut/divisions/water-resources/water-resources-permits/wastewater-bmnch/npdes-wutewatw-permits

Winston-Salem Journal
Advertising Affidavit
P.0 Box 3159
Winston-Salem, NC 27102
NCDENR/DWO/POINT SOURCE BRANCH
ATTN: WREN THEDFORD
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
PO Number Order Category Description
Account Number
3376309
Date
March 10, 2017
PUBLIC NOTICE 0000326135 Legal Notices PUBLIC NOTICE North Carolina Environmental Management Commission/ NPDES Unit 161
PUBLIC NOTICE
Publisher of the
North Carolina Environmental -
Winston-Salem Journal
Management Commission/
NPDES Unit
Before the undersigned, a Notary Public of Guilford, North Carolina, duly oommissioned,
1617 Mail service Center
Raleigh, NC 21699-1617
qualified, and authorized by law to administer oaths, personally appeared the Publisher
Notice of Intent to Issue a NPDES
Representative who by being duly sworn deposes and says: that he/she is the Publisher's
Wastewater Permit
Representative of the Winston-Salem Journal, engaged in the publishing of a newspaper
The North Carolina Environmental
known as Winston-Salem Journal, published, issued and entered as second class mail in the
Management Commission proposes
to issue a NPDES wastewater dis-
City of Winston-Salem, in said County and State: that he/she is authorized to make this
charge permit to the person(s) listed
affidavit and sworn statement: that the notice or other legal advertisement, a copy of which
below. Written comments regarding
is attached hereto, was published in the Winston-Salem Journal on the following dates:
the proposed permit will be accept-
ed until 30 days after the publish
date of this notice. The Director of
the NC Division of Water Resources
03/10/2017
(DWR) may hold a public hearing
should there be a significant degree
of public interest Please mall com-
ments and/or information requests
to DWR at the above address. Inter-
and that the said newspaper in which such notice, paper document, or legal advertisement
est512 persons may visit the DWR at
512 N. Salisbury Street, Raleigh, NC
was published was, at the time of each and eve such publication, a newspaper meetin all
P every Pg
to review Information on file. 6ddi-
the requirements and qualifications of Section 1-597 of the General Statutes of North
! tional Information on NPDES permits
and this notice may be found on our
Carolina and was a qualified newspaper within the meanie of Section 1-597 of the General
9g
website: http://deq.nc.goy/abouVdi
Statutes ofNorth Carolina.
. visions/water-resources/water-
resources-permits/wastewater-
branch/npwastewater/public-
/
notices,ar byy calling [phone].
Town of Mocksville requested issu-
ance of permit NCO089290 for its
signature ojperson r ng affidavit)
Water Treatment Plant in Davie
County. This permitted discharge is
treated filter -backwash wastewater
to a UT to Bear Creek Yadkin River
Swum to and subscribed before me the 10 day of March, 2017
Basin.
WSJ: March 30, 2017
LEAANNELAMB
L �L C� 1.�
NOTARY PUBLIC
STATE OF NORTH CAROLINA (Notary Public)
GUILFORO COUNTY
MY COMMISSION EXPIRES U6 75 19
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

Table 1
Facility Name
W WTPIWTP Class
NPDES Permit
Outfall
Flow, Qw (MGD)
Receiving Stream
HUC Number
Stream Class
aApply WS Hardness WQC
7Q105 (cfe)
70110w Ids)
30Q2 (cfs)
CIA(cfs)
I We (cfs)
Effluent Hardness
_Upstreamii;Hardness
Combined Hardness Chronic
Combined Hardness Acute
Data Source(s)
Freshwater RPA - 95% Probability/i Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
tInformation
[DCHECK IF HQW OR ORW WQS
Hugh A. Lagle WTP
PC-1
NCO089290
001
0.275
UT to Bear Creek
0304010206
Jji
0.00
0.00
0.00
0.00
0.00
40.2 mg/L (Avg)
56.2 mg/L (Avg)
____-- _._-___-
40.2 mg/L
—_-- —_40.2 mg/L
Par01
Par02
li
Par04
Par05
ParO6l♦
Par07
Panne
Par09
ParlO
Par11
Par12
Par13
Par14
Par15
Par1a
Parr]
Par18
Part
Par20
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name wos Type Chronic ModiFer Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HH/WS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic we
NC
0.8448
FAI
4.9042
ug/L
Chlorides
Aquatic Life
NC
230
FW
mglL
Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
173.7180
FW
1335A760
1 ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
11.8259
FIN
16,3829
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Ufe
NC
1.800
FW
ug/L
Lead
Aquatic Life
NC
5.0097
FW
128.5577
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
1
Molybdenum
Human Health
INC
2000
HH
ug/L
Nickel
Aquatic Life
NC
55.6451
FW
500.9949
pg/L
Nickel
Water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
uglL
Silver
Aquatic Life
NC
0.06
FW
0.6709
ug/L
Zino
Aquatic Life
NC
189.5298
FW
187.9920
ug/L
2-27-17_Updated 9595 Final FW RPA w upstream avg data column_diss to totalmelals_nodetects_limiteddefaults, Input
2/2712017

Effluent Hardness
°'M,xlmum
av
polnta=5B
Data
Data
BDL=IYLDL
Results
1 1192017
33
33
Std Dev.
4.3818
1 1/102017
45
45
Mean
40.2000
1 1/112017
41
41
C.V.(default)
O.6000
t 1/122017
41
41
n
5
1/132017
41
41
10M Per value
36.20 mg
i
Manage Value
40.20 mg
r
Max. Value
4 Ao mg
REASONABLE POTENTIAL ANALYSIS
Upstream Hardness
polnb=50
Date
Data
BDL=112DL
Results
1/92017
57
57
SW Dev.
4.3818
! 1/102017
57
57
Mean
56.2000
1 I/11/2017
49
49
C.V. (default)
O.6000
t 1/122017
57
57
n
5
i 1/132017
61
61
10M Per value
52.20 mg/L
i
Average Value
56.20 mg/L
F
Max. Value
61.00 mg/L
& Pat02
ua' •PASTESPECIA
Arsenic
Valuei thon'COPY
. taaxlmum 4ta
ppinb c SB
Data Data BDL--II2DL Results
SW De,
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
Mutt Factor =
N/A
Max. Value
N/A 4&
Max. Pred C.
N/A ug2
2-27-17_Updated 9595 Final FW RPA w_upstream avg data column_diss to totemetals_nodeleds_Iimiteddefaults, data
-1- 2272017

Data Dam
Beryllium
���"°• 1^^^'copy
Meamum$a
pwnb=5a
BDLI112DL Raaift
Still DO,
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
We Factor=
WA
Max. Value
WA u9IL
Max. Pied Cw
WA uorL
REASONABLE POTENTIAL ANALYSIS
Cadmium
••�Mnlmum mv'
mum
pol
Data Dam BDL=1QDL Reaulm
Std Dev.
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
Mult Factor =
WA
Max. Value
WA u91L
Max. Prod C.
WA ua
lilm"P Eitl4m
Chlorides
Max1mumdonsim mrs..
69
Data Dam BDL-InDL Reaalm
Sm Dev.
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
Mult Factor=
WA
Max. Value
WA moll -
Max. Pied Cw
WA na&
23T-1T_updated 9595 Final FW RPA w_upstream avo data Wumn_diss to tomlmemis_nodeleclsfimiteddetaulls, data
-2- 2 7=1T

C
Chlorinated Phenolic Compounds
new Data 8DL=12DL Results
Std Dew.
Mean
C.V.
n
Mull Factor=
Max. Value
Max. Fred Ow
REASONABLE POTENTIAL ANALYSIS
Total Phenolic Compounds
Data Data
BDL= MDL Results
NO DATA
1
Std De,
NO DATA
2
Mean
NO DATA
3
G.V.
0
4
n
5
WA
6
Mull Factor=
WA u92
7
Max. Value
WA u9tL
8
Mex. Fred C.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Cl
44
45
46
47
48
49
50
51
52
63
54
55
58
57
58
We PA SPEC
V.w.: 11-'CC
Chromium 111
. rx-,— d.l.
n rots=sa
Data Dab BDL=l2DL Results
NO DATA
1
Sol Dew.
NO DATA
NO DATA
2
Mean
NO DATA
NO DATA
3
C.V.
NO DATA
0
4
n
0
5
WA
6
Mull Factor =
WA
WA ulyL
7
Max. Value
WA p9IL
WA u91
8
Max. Pred C.
WA p911.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Data On
3-
2-27-17_Updated 9595 Final FW RPA w_upstream avg data column_dlss to tolalmelals_nodetects_Iimileddelautts, data
2272017

Chromium VI
re eDLyINL Resuaa
Sta Dev. NO DATA
Mean NO DATA
C.V. NO DATA
n 0
Mutt Factor= WA
Max. Value WA pg&
Max. Pre0 Cw WA pg2
REASONABLE POTENTIAL ANALYSIS
Chromium, Total
v.war tn.a -covr
Mes m tla�a
gint¢ = Se
Data Data SOL-1120L Results
Sul Dev.
NO DATA
Mean
NO DATA
C.V.
ND DATA
n
0
Mull Factor=
WA
Max. Value
WA pg/L
Max. Pree C.
WA p9/L
Data
Data
1201-m1l20L
Results
12/172015
<
10
5
Sul Dev.
! WS2016
<
10
5
Mean
1 6/142016
<
10
5
C.V.(Eefault)
1 W02016
<
10
5
n
i 12/112016
10
10
i
Mutt Factor=
Max. Value
i
Max.P dGv
. rNSMbn J.1.
Pilau=sa
2.2361
6.0000
0.6000
5
2.32
10.00 uyL
23.20 ul
Par12
Data Data aDL=12DL
.4.
2-27-17_Updated 9595 Final FW RPA w_upstream avg data Wumn_din to totalmetals_noaetects_limiteacefautls, dala
2272017

Vslws' IM1en "COPY"
palnb � 58
Results
Sid De,
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
Malt FactorWA
Max. Value WA ug/L
Max. Pred CY WA ul
REASONABLE POTENTIAL ANALYSIS
Fluoride
Date
Data
BDL-10201.
Results
1 12/17/2015
<
0.1
0.05
Sid Dev.
! 3/152016
0.1
0.05
Mean
I 6I142016
<
0.1
0.05
C.V. (default)
1 9/202016
<
0.1
0.05
n
i 12/192016
0.1
0.1
S
Mutt Factor=
r
Man. Value
I
Max. Pred C.
Parl4
. m..im ism ame L
palms=59
0,0224
0.0600
0.6000
5
2.32
0.1 ug4
0.2 u9i
Lead
Data BDLa141131. Rewtts
Sid Dev.
Mean
C.V.
n
Mult Faotar=
Met. Value
Mat. Fred C.
par15
uw"PASIESPEc
yr M-1.�m.1.
Mercury
polnU=58
Date Data
BDL=1/2DL Resuln
NO DATA
1
Std Dev.
NO DATA
2
Mean
NO DATA
3
C.V.
0
4
n
5
WA
6
Mutt Factor
WA ug/L
7
Max. Value
WA ug&
a
Max. pred C.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
68
2-27-17_Updated 9595 Final FW RPA ._upstream avg data column_ else to totalmetals_nodetects_limiteddetaults, data
5- 2127/2017

. Maximum E.N
paints 158
NO DATA
NO DATA
NO DATA
0
WA
WA ag&
WA egL
Data Data BDL=InDL Results
Std Dev
Mean
C.V.
n
Mull Factor =
Max. Value
Max. Pred Cw
REASONABLE POTENTIAL ANALYSIS
v.lo..^ man 'CO"'
. Maximum &U
point. s 5a
NO DATA
NO DATA
NO DATA
0
WA
WA uglL
WA uglL
& Pads
Nickel
Dale Data BOL=II2DL Result
Stal Dev.
Mean
C.V.
n
Mutt Fader =
Max. Value
Max. Fred Cw
Maximum NY
,mina a 58
NO DATA
NO DATA
NO DATA
0
WA
WA 'I"
WA pga
Selenium
Date Data BDL=11EDL Retwtle
SM Day. !iD DATA
Mean NO DATA
C.V. NO DATA
n 0
Must Fader WA
Max. Value WA
Max. Feed De WA
2-2T-1T_Updated 9595 Final FW WA w_upstream avg data column dies to tolalni lelscLs _nodele_limiteddefoutts, data
-6- W7=1T

REASONABLE POTENTIAL ANALYSIS
RCML
Pa26
Un RASTE 6PELIAL
Par21
Uee"PA4TE SPECUU.
PaY12
Uw'P0.5TE ePECIAL
StM.S E.,"
Pa Yl
COPM
Ld
SI(VBf
Veluei tMn'TOPY'
.04vlmum Este
uDC
Veluei Iban'COPY'
Mulmum GU
O
Vel..i
. Maximum 4ele
8
Pdnle=53
polnts•56
Pointe -50
Date Data
1
BDL=l2DL Results
SW Dee.
NO DATA
1
Date
12/172015
Dab
<
10
BDL-12DL
5
Results
SW Dee.
2.2361
Data Data
1
BDL-12DL Results
Stll Dew.
NO DATA
1
2
Mean
NO DATA
2
3/152016
<
10
5
Mean
6.0000
2
Mean
NO DATA
2
3
C.V.
NO DATA
3
W142016
<
10
5
C.V. (default)
0.6000
3
C.V.
NO DATA
3
4
n
0
4
9202016
<
10
5
n
5
4
n
0
4
5
5
12/192016
10
10
5
5
6
Mull Factor =
WA
6
Mull Fader =
2.32
6
Mull Factor=
WA
6
ug/L
7
Max. Value
WA ug/L
7
Max. Value
10.0 ug/L
7
Max. Value
WA
7
ugl
8
Max. PreE C.
WA ug/L
8.
Max. Preel Cw
23.2 ugk
8
Max. Red C.
WA
8
9
9
9
9
10
10
10
10
11
11
11
11
12
12
12
12
13
13
13
13
14
14
14
14
15
15
15
15
16
16
16
16
17
17
17
17
18
18
18
18
19
19
19
19
20
20
20
20
21
21
21
21
22
22
22
22
23 -
23
23
23
24
24
24
24
25
25
25
25
26
26
26
26
27
27
27
27
28
28
28
28
29
29
29
29
30
30
30
30
31
31
31
31
32
32
32
32
33
33
33
33
34
34
34
34
35
35
35
35
36
36
36
36
37
37
37
37
38
38
38
38
39
39
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43
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44
44
dd
45
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49
49
49
49
50
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50
50
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52
53
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53
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55
55
55
55
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56
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50
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58
2-27-17 UprlateC 9595 Final FW RPA w_upstream avg data cdumn_dies to lotalmetals_nolleteets_limitea4efauas. dam
-7- WT2017

5
Data Dan
. N..4num ears
Pden • se
BDL=1rsDL Results
Ste Div.
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
MUIt Factor =
WA
Mae. Value
WA
Max. Pree Qv
WA
REASONABLE POTENTIAL ANALYSIS
Par25
D
v.w..- men-cor
uextmum a.m
P tm.=sa
Data Data BDL=1rsDL Reeulb
StdMe Div.
NO DATA
NO DATA
C.V.
Cm.
NO DATA
n
0
Mult Factor =
WA
Max. Value
WA
Mu. Pree Cw
WA
D
re..tmem airs
Pdnn • 5e
Data Data BDL=1rsDL Reaults
Ste De,
NO DATA
Mean
NO DATA
C.V.
NO DATA
n
0
Mull Factor =
WA
Mae. Value
WA
Max. NW Cw
WA
2-27-17_Updated 9595 Final FW RPA w_upstream avg eab column_eiss to toWnrudals_noeetects_limiteeeelaults. Cab
'9- 2rs7Q017

Hugh A. Lagle WTP
NCO089290
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw(MGD)= 0.28
IQIOS(cfs)= 0.00
7QIOS (cfs) = 0.00
7QIOW (cfs)= 0.00
30Q2(cfs)= 0.00
Avg. Stream Flow, QA (efs) = 0.00
Receiving Stream: UT to Bear Creek HUC 0304010206
WWTP/WTP Class: PC-1
IWC% @ IQIOS = 100
1WC%@7Q10S= 100
IWC%@7QIOW= 100
IWC%@30Q2= 100
IW%C@QA= 100
Stream Class: WS-IV
Outfall 001
Qw = 0.27522581 MGD
COMBINED HARDNESS (mg/L)
Acute = 40.2 mg/L
Chronic = 402 mg/L
YOU HAVE DESIGNATED THIS RECEIVING
STREAM AS WATER SUPPLY
Effluent Ham: 0 value> 100 myL
Effluent Ham Avg = 40.2 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
J
O
r
Chronic Acute
D # Det. Max Ihed Cw Allowable Cw
11i
a
SAta�nhdaerdd
Acute (FW): 340.0
Arsenic
C
150 FW 340
ue/L
0 0
N/A
Chronic (FW): 150.0
Arsenic
C
10 HH/WS
ug/I.
Chronic(HH):---10.0------------------------------
Acute: 65.00
Beryllium
NO
6.5 FW 65
u� L
0 0
N/A
---------------------------------------------
Chronic: 6.50
Acute: 4.904
Cadmium
NC
0.8448 FW 4.9042
ug/L
0 0
N/A
_ _ _
Chronic: 0.845
Acute: NO WQS
Chlorides
NC
130 I:%\
mg/L
0 0
N/A
_
Chronic:—'—_-230.0 _
'—'—'—'—'—'—_—'—'—
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
I A
ug'L
0 0
N/A
Chronic:------1.0
Acute: NO WQS
Total Phenolic Compounds
NC
300 A
ug/L
0 0
N/A
_ _ _ _ _ _ _ __
Chronic: 300.0
_ _ _ _ _ _ _ _ _ _ _ _ _
Acute: 1,335.5
Chromium 111
NC
173.7180 FW 1335.4760
WL
0 ll
N/A
Chronic:—_—_-173.7
Acute: 16.0
Chromium VI
NC
I I FAA16
pg 1
Il 0
N/A
_ _ro_
Chnic:—.---ITO—_ ------------------------------
Chromium, Total
NC
lw 1,
fl 0
N/A
2-27-17_Updated 9595 Final FW RPA w_upstream avg data column_diss tototalmetals_nodetects_limiteddefaults, rpa
Page 1 of 3 2/27/2017

Hugh A. Lagle WTP
NCO089290
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
Outfall 001
Qw = 0.27522581 MGD
Acute: 16.38
RP for Limited Datasat(n<8 samples) - apply
Copper
NC
11.8259 FW 16.3829
ug/L
5 1
23.20
Quarterly Monitoring
Note. n59
Default C.V.
_ _ _ ___
Chronic: ILR3
RP for Limited Datasel (n<8 samples) - apply
I.hnited data set
No value> Allowable Cw
Quarterly Monitoring
Acute: 22.0
Cyanide
NC
5 FW 22
10
ug/L
0 0
N/A
_ _ _ -- __ _
--5.0 --
— ______________-_____-_---
Chronic:
Acute: NO WQS
No RP, Predicted Max <50%of Allowable Cw-No
Fluoride
INC
1800 FW
ug/L
5 1 0.2
Monitoring required
Note. n < 9 Default C.V.
_ _
Chronic_ 1,800.0
N0 RP, Predicted Max<50%of Allowable Cw-No
Limited data set
No value> Allowable Cw
Monitoring required
Acute: 128.558
Lead
NC
5.0097 FW 128.5577
ug/L
0 0
N/A
_ __
_ _ _____________
_ ___
Chronic: 5.010
Acute: NO WQS
Mercury
NC
12 FW
0.5
ng/L
0 0
N/A
_ _ _ _____ _
____ _ _________ _ ____
Chronic: 12.0--
Acute: NO WQS
Molybdenum
NC
2000 HH
ug/L
0 0
N/A
_ _ _ _ __
___________________________
_____
Chronic. 2,000.0
Acute (FW): 501.0
Nickel
NC
55.6451 FW 500.9949
pg/L
0 0
N/A
---------------------------------------------
Chronic (FW): 55.6
Nickel
INCronWS): C
25.0000 WS
µg/L
Cic(25.6
Acute: 56.0
Selenium
INC
5 FW 56
ugl.
u 0
N/A
Chronic: 5.0
Acute: 0.671
Silver
NC
0.06 FW 0.0119
ki" 1
0 0
N/A
---_-_-_-_-_--_—_--_-_-_-_
0.0_
Chronic----60
Acute: 188.0
No RP, Predicted Max < 50% of Allowable Cw - No
Zinc
NC
189.5298 FW 187.9920
ug/L
5 1
23.2
Monitoring required
Note: n<9
Default C.V.
Chronic: 189.5
No RP, Predicted Max<50%of Allowable Cw-No
Limited data set
No value > Allowable Cw
Monitoring required
Acute:
0 0
N/A
— —
Chronic-
Acute:
0 0
N/A
_
Acute:
2-27-17 Updated 9595 Final Fw RPA w_upstream avg data column_diss to totalmetals nodalects_Ilmiteddefaults, rpa
Page 2 of 3 2/27/2017

Hugh A. Lagle WTP
NCO089290
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
Outfal l 001
Qw = 0.27522581 MGD
0 0
N/A
Chronic:—_________
Acute:
0 0
N/A
_
Chronic-----_---
---------
2-27-17_Updated 9595 Final FW RPA w_upstmam avg data culumn_diss to totalmetals_nodetects_Iimheddefaults, rpa
Page 3 of 3 2/27/2017

AU Number: I AU Name:
AU Description:
13-17-5-5 Stony Creek
From source to Mallard Creek
Yadkin -Pee Dee River Basin
Area: AU Units: Classification:
5.1 FW Miles C
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Benthos Fair (Nar, AL, FW)
2003
2008
13-17-5-4 Toby Creek 4.4 FW Miles C
From source to Mallard Creek
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Benthos Fair (Nar, AL, FW)
2003
2008
Subbasin South Yadkin River
12-108.18-(3) Bear Creek 8.6 FW Miles WS-Iv
From a point 0.2 mile downstream of U.S. Hwy. 64 to South Yadkin River
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
Se
EC
Copper (7 lug/I, AL, FW)
2008
2010
12-308-20a1 Fourth Creek 10.2 FW Miles C
From source to Morrison
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Fish Community Poor (Nar, AL, FW)
2003
1998
12-108-11-3 Patterson Creek 10.6 FW Miles C
From source to Rocky Creek
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Benthos Fair (Nar, AL, FW)
2011
2014
12-108-9-(0.6) Snow Creek 12.5 FW Miles WS-Iv
From a point 1.1 miles upstream of Iredell County SR 1614 to South Yadkin River
IRCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC Fish Community Fair (Nar, AL, FW) 2006 2008
Subbasin Yadkin River
12-119-(1) Abbotts Creek 18.8 FW Miles WS-III
From source to a point 0.5 mile upstream of Davidson County SR 1810
RCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC - Fish Community Fair (Nar, AL, FW) - - 2011 2008
12-119-(6)b Abbotts Creek 1.6 FW Miles C
From SR1243 to185
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Benthos Fair (Nar, AL, FW)
2006
2004
2014 INC 303(d) List -Category 5 Final December 19, 2014 Page 143 of 149

Young, Brianna A
From: Mitchell, Patrick
Sent: Friday, February 24, 2017 2:32 PM
To: Young, Brianna A
Subject: Re: Question regarding Hugh A. Lagle WTP renewal
Brianna,
I checked with George Smith in our office and we would be ok with this.
Sorry for the delay in responding.
Thanks,
Patrick
Email sent via Outlook Web App
Patrick L. Mitchell, REHS, LSS
Water Quality Regional Operations Section
NCDEQ, Winston-Salem Regional Office
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and
may be disclosed to third parties unless the content is exempt by statute or other regulation.
From: Young, Brianna A
Sent: Thursday, February 16, 20171:24:38 PM
To: Mitchell, Patrick
Subject: Question regarding Hugh A. Lagle WTP renewal
Good afternoon Patrick,
I am currently working on the permit renewal for the Hugh A. Lagle WTP in Mocksville. In speaking with the permittee,
they have concerns about the draft permit that was sent to them. In the current draft, which used the previous 4.5
years of discharge data, they will be receiving limits of 7.88 ug/L (monthly avg) and 10.47 ug/I (daily max) for copper and
126.7 ug/I (monthly avg) and 125.7 ug/I (daily max) for zinc. The permittee stated that a new plant was put in place in
2015, and they are requesting that we reduce the number of years of data used in our reasonable potential
analysis. After rerunning the RPA for just data from Dec. 2015 through Dec. 2016 (the period the new plant was in
place), the permittee would have no limits, only quarterly monitoring.
Would the Winston Salem regional office approve of using just the 2016 data for this permittee given a new plant has
been installed, or would the region request that we still use all previous 4.5 years of data and apply the limits?
Regards,
Brianna Young
Environmental Specialist
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-807-6388

Brianna.You ng(o).ncdenr.gov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617
PC-'�'1Vothk g Compares
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require
full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile
home parks, etc) that can be administratively renewed with minor changes, but can include
facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing,
instream monitoring, compliance concerns).
Basic Information for Expedited Permit Renewals
Permit Writer/Date
Brianna Your 11/28/16
Permit Number
NCO089290
Facility Name
Hugh A. La le WTP
Basin Name/Sub-basin number
Yadkin Pee Dee 03-07-06
Receiving Stream
UT to Bear Creek
Stream Classification in Permit
WS-IV
Does permit need Daily Max NH3 limits?
No
Does permit need TRC limits/language?
Already resent - Updated
Does permit have toxicity testing?
Yes
Does permit have Special Conditions?
Yes — Chronic toxicity monitoring
Does permit have instream monitoring?
No
Is the stream impaired on 303(d) list)?
Yes - Copper
Any obvious compliance concerns?
No
Any permit mods since lastpermit?
No
Current expiration date
12/31/2016
New expiration date
12/31 /2021
Comments received on Draft Permit?
• eDMR language updated in footnotes and Section A. (3.)
• Regulatory citations added
• Sample location footnote removed
• Removed footnote - Limits, including the requirement for continuous flow recording
become effective December 1, 2015, or upon completion of the wastewater treatment
facilities, whichever comes fast. Instantaneous flow estimates and discharge duration
shall be recorded until the flowmeter is operational. Upon completion of construction of
wastewater treatment facilities, the Town shall notify the Winston-Salem Regional Office
of DENR at [phone], and the Central Office of the Division of Water Resources,
NPDES Permitting Unit at [phone]. All limits become effective the first of the
next month. Monitoring is required beginning on the effective date of this permit.
• Updated TRC footnote, zinc footnote, eDMR footnote
• Added fluoride footnote
• Added ammonia nitrogen footnote
• Removed monthly turbidity monitoring
• Changed pH from > 6.0 SU > 9.0 SU to >— 6.0 SU and < 9.0 SU
o Fc,r CornXr exi-r,C- • Cry,.
Most Commonly Used Expedited Language:4��'
• 303(d) language for Draft/Final Cover Letters: "Please note that the receiving stream
is listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List.
Addressing impaired waters is a high priority with the Division, and instream data will
continue to be evaluated. If there is noncompliance with permitted effluent limits and
stream impairment can be attributed to your facility, then mitigative measures may be
required".

TRC language for Compliance Level for Cover Letters/Effluent Sheet Footnote:
"The Division shall consider all effluent TRC values reported below 50 µg/L to be in
compliance with the permit. However, the Permittee shall continue to record and submit
all values reported by a North Carolina certified laboratory (including field certified),
even if these values fall below 50 µg/L."

WILLIAM J. MARKLIN, III
Mayor
Commissioners:
ROB TAYLOR, Mayor Pro Tem
JOHNNY FRYE
LASH GAITHER SANFORD, JR.
AMYVAUGHAN-JONES
BRENT WARD
Down 0/ mockville
INCORPORATED 1838
171S. CLEMENT STREET
MOCKSVILLE, NC 27028
March 22, 2016
Ms. Wren Thedford
NC DEQ./ DWR / NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
CHRISTINE W. BRALLEY
Town Manager
HENRY P. VAN HOY II
Town Attorney
RECEIVEDINCDEUDWR
.APR 21 2016
Water Quality
Permitting Section
Subject: Town of Mocksville-Hugh A. Lagle Water Treatment Plant. Permit Renewal
Package NPDES NCO089290
Dear Permitting Unit:
The Town of Mocksville appreciates the opportunity to submit the NPDES renewal
application package. Please find enclosed (1) one original and (2) two copies of the
following:
• NPDES Short Form C-WTP
• WTP and W WTP Process Schematic
11
Sludge Handling Plan
After careful review of the NPDES Permit issued in 2013, the Town is requesting that the
upstream and downstream monitoring requirements be removed from the permit as
these requirements are not consistent with permits issued to water treatment plant
dischargers in North Carolina.
If the Town of Mocksville can be of any further assistance -or additional information is
needed, please contact me at 336-753-6700 or Tom Johnson at 252-419-2199.
Sincerely, �l%/�e 5(
a �—Y;L XXF. U
Christine Bralley.
Town Manager
Enclosure(s): NPDES Renewal Package
PHONE: [phone] • FAX: [phone]
www.macksvillenc.org

Town of Mocksville Solids Handling Plan
NPDES Permit # NCO089290
Recently, in 2015 the Town of Mocksville constructed a residual solids handling facility
at the Mocksville Water Treatment Plant. The sedimentation basin solids and the filter
backwash water is sent to two equalization storage tanks onsite. The solids are allowed
to settle and the clear water is decanted from the equalization storage tanks,
dechlorinated and is discharged to an Unnamed Tributary to Bear Creek. Once there
are enough residual solids to haul, the Town's land application contractor (EMA
Resources) will pump the residuals from the equalization tank and land apply per the
Town of Mocksville's Land Application Permit.