NC0078115_Permit Modification_20170510

ROY COOPER
Governor
Water Resources
ENVIRONMENTAL QUALITY
May 10, 2017
Thomas J. Roberts, President, COO
AQUA North Carolina, Inc.
202 MacKenan Court
Cary, North Carolina 27511
MICHAEL S. REGAN
secretary
S. JAY ZIMMERMAN
Armor
Subject: Issuance of NPDES Permit Modification NCO078115
Greystone Subdivision WWTP, Grade 11
Pine Creek Road, North of Kemersville
Kernersville, North Carolina 27284
Forsyth County
Dear Mr. Roberts:
The Division of Water Quality (the Division) hereby issues the attached NPDES permit for the subject facility.
We issue this permit 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.
Changes for Renewal. Acknowledging your request to modify W WTP influent, we hereby approve your
proposed introduction of additional wastewater as "uranium -filter backwash" generated in support AQUA -
owned wells producing potable water. We note AQUA's potable water generation employs ion exchange (IE)
treatment technology, and we understand that you intend to deliver this filter backwash by truck to the W WTP's
equalization (EQ) basin. Finally, we understand that you propose to introduce this additional flow manually to
the W WTP at a rate approximating one (1) gpm or 60 gph, at maximum not -to -exceed 500 gpd, and that current
W WTP facilities, as built, are adequate to accommodate this additional flow.
The Division notes from your renewal application that AQUA has made no significant changes to its effluent
treatment processes since last renewal. Accordingly, we have updated your permit format and site map.
However, we have added additional monitoring and permit limits [see permit A. (I.) and A. (2.)] to
accommodate new parameters of concern (POCs). Additions include:
• seven (7) radiological POCs, as proposed in AQUA's application for modification
• Total Copper, Total Zinc and Total Lead, monitoring only [ion -exchange (IE) processes]
• Total Hardness, effluent and upstream [required for future dissolved metals calculations]
• Total Chloride [ion -exchange (IE) processes]
• Whole Effluent Toxicity (WET) testing, Quarterly at 38% effluent concentration (Phasel flow), and 45%
effluent concentration (Phase 2 flow) at respective outfall locations [ion -exchange (IE) processes]
• corrected location of Outfall 001 to LAT 360-10'-3.6" LONG 800-05'-10.1," based on Compliance
Evaluation Inspection Report (WSRO), 23Feb2015.
• updated street address from Creek Bed Road to Pine Creek Road, based on Google Maps, 2017.
Note that the Phase 2-flow discharge location (proposed at Vance Road overcrossing) shall be
designated Outfall 002 [Outfall 001 to be abandoned upon expansion].
State of North Carolim I Environmental Quality I Water Resources
1611 Mail service Center I Raleigh, North Carolina 27699-1611
919 707 9000

Thomas J. Roberts
AQUA NC — Greystone W WTP
May 10, 2017
Page 2
Our records show that you have successfully registering with the Electronic Discharge Monitoring
Report (eDMR) Program. Please be reminded that until the state's eDMR application is approved
compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), all permittees must
continue to submit hardcopy of DMR as backup to eDMR reporting [see permit section A. (6.)].
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory heating, upon written request submitted within
thirty (30) days after receiving this letter. Your request must take the form of a written petition
conforming to Chapter 150B of the North Carolina General Statutes, and you must file it with the office
of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless
such a demand is made, this permit shall be final and binding.
This permit is not transferable except after notifying the Division of Water Resources. The Division
may modify, revoke or re -issue this permit. Please note that this permit does not affect your legal
obligation to obtain other permits required by the Division of Water Resources, the Division of Land
Resources, the Coastal Area Management Act, or any other federal or local governments.
If you have questions, or if we can firrther assist you, please contact Joe Corporon at
[ioe.corporonna,ncdenngov] or call his direct line [phone].
tfully,
C-
S. Jay Zimmerman
Enclosure: NPDES Permit NCO078115 (issuance final)
hc: WSRO/SWPS, Sherri Knight
Central Files
NPDES Program Files
ec: WSRO/SWPS, Sherri Knight
ATU Susan Meadows; Cindy Moore
OCU, Maureen Kinney
AQUA; Lorie T. Ison

Permit NCO078115
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 Control Act, as amended,
AQUA of North Carolina, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Greystone Subdivision WWTP
Pine Creek Road, North of Kernersville
Forsyth County
to receiving waters designated as an unnamed tributary (UT) to Right Fork of Belews Creek (Dean
Creek) in the Roanoke River Basin in accordance with effluent limitations, monitoring requirements,
and other conditions set forth in Parts I, II, III, and IV hereof.
The permit shall become effective June 1, 2017.
This permit and the authorization to discharge shall expire at midnight on February 28, 2022.
Signed this day May 10, 2017.
V-dy Zimmerman, P.G.
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 11

Permit NCO078115 r
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.
AQUA of North Carolina, Inc.
is hereby authorized to:
1. continue to operate an existing 0.032 MGD package -type wastewater treatment system
utilizing the components
♦ influent pump station
♦ flow splitter
♦ bar screen
♦ flow -equalization basin
♦ dual (2) extended aeration basins
♦ dual (2) clarifiers
♦ sludge holding tank
♦ chlorination [tablet]
♦ dechlorinator [tablet]
♦ v-notch weir
♦ effluent -flow recording meter and sample port
this facility located at the Greystone WWTP, off Pine Creek Road (north of Kernersville)
at Greystone Subdivision in Forsyth County; then
2. discharge from said treatment works via Outfall 001, at a location specified on the
attached map, to an unnamed tributary (UT) to the Right Fork of Belews Creek [Stream
Segment 22-27-(2)], a waterbody currently classified C within Subbasin 03-02-01 [HUC
03010103] of the Roanoke River Basin; and
3. after receiving an Authorization to Construct (ATC) permit from the Division to expand
flow, and after relocating to Outfall 002 [abandoning Outfall 001 ], construct wastewater
facilities not to exceed 0.185 MGD; and after submitting to the Division an Engineers
Certification form documenting that upgrades were completed in accord with this permit
and the ATC, then
4. discharge from said treatment works via Outfall 002, at a location specified on the
attached map, to an unnamed tributary (UT) to the Right Fork of Belews Creek (Dean
Creek) [Stream Segment 22-27-(2)], a waterbody currently classified C within Subbasin
03-02-01 [HUC: 03010103] of the Roanoke River Basin.
Page 2 of 11

Permit NCO078115
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[NCAC 02B.0400 et seq., 02B.0500 et seq.]
Beginning on the effective date of this permit and lasting until expiration or expansion, the Permittee
is authorized to discharge treated groundwater from Outfall 001. Such discharges shall be limited,
monitored and reported 1 by the Permittee as specified below:
Y IlI ITS
-MONITORING REOUMMENTS .
FFLUEl'i' OHARACTERISTICS
Monthly ;
;Daily
Measurement
S�anpe.:
$ample'"
[Parameter�CodeJ
Average ;;Via3dmum
FrqueQcy
.Type
Iocats6n .
Flow
50050
0.032 MGD
Continuous
Recording
I or E
Temperature (°C)
00010
Daily
Grab
E
Total Residual Chlorine 3
50060
28 ug/L
2/Week
Grab
E
Fecal Coliform
(geometric mean)
31616
200/100 ml
400/100 ml
Weekly
Grab
E
Dissolved Oxygen
00300
Daily Average > 5.0 mg/L
Weekly
Grab
E
PH
00400.
Not < 6.0 nor > 9.0
Standard Units
Weekly
Grab
E
BOD, 5-day (20°C)
C0310
23.0 mg/L
34.5 mg/L
Weekly
Composite
E
Total Suspended Solids
C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
E
Ammonia Nitrogen
q
C0610
2.0 mg/L
10.0 mg/L
Weekly
Composite
E
[NH3 as N] —Summer
Ammonia Nitrogen
[NH3as N] —Winter q
C0610
4.0 mg/L
20.0 mg/L
Weekly
Composite
E
Temperature (°C)
00010
Weekly
Grab
U & D
Dissolved Oxygen
00300
Weekly
Grab
U & D
Hardness —Total as
[CaCO3 or (Ca + Mg)] 5
00900V
Quarterly
Grab
U
Total Hardness —as
5
[CaCO3or (Ca + Mg)]
00900
Quarterly
Composite
E
Total Copper 5
01042 V
Quarterly
Composite
E
Total Zinc 5
0109214,
1092
Quarterly
Composite
E
Total Lead 5
01051
Quarterly
Composite
E
Total Chloride �l
00940V
Quarterly
Composite
E
Whole Effluent Toxicity (WET) 6
(Chronic)
TGP3B
Quarterly
Grab
E
Combined radium-226 and
5 pCi/L
/��
radium-228 (pCi/L) ��g
11503
(report annual average)
Quarterly
( Grab /1
E
- 0 ,,; , Page 3 of 11

Permit NCO078115
LIlVIITS
MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTICS
Monthly
Daily
Measurement
Sample
$ample2
[Parameter Code]
Average
Maximum
Frequency
Type
Location .
Alpha emitters, excluding radon a
.,
and uranium
82077
15 ilL
(report annual
al average)
Quarterly
Grad
,,
E
(PCB) ��g
f�
Beta emitters, excluding
potassium40 and other naturally
50 Ci/L
occurring radionuclides
03520
(repo annual average)
Quarterly
Grab
E
(PCi/L) 798
Strontium-90 (pCi/L) 78
13501
30 µ1�2 ��
(report weekly average) .,
Quarterly
Grab ��
t
E
Tritium (pCi/L) 7'8
82126
20;000 pCi/L
(report annual averse
Quarterly
Grab j
E
Uranium (µg/L) 9
22708
weekly
(report Y aversaverage)
Quarterly
i Graf
E
Footnotes:
t
l 1
.
��jAe
�� 0l�
1. The Permittee shall submit Monthly Discharge Monitoring Reports (DMRs) electronically using DWR's eDMR
electronic submittal system [See Section A. (6.)].
2. E = Effluent; I = Influent; U = Upstream, 20 feet from discharge point; D = Downstream, 0.01 mile from discharge
point.
3. Total Residual Chlorine (TRC) - The Division shall consider compliant all effluent TRC values reported below 50
µg/L. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified
test methods (including field certified), even if these values fall below 50 µg/L.
4. Summer = April 111 through October 31 11; Winter = November 1 st through March 31
5. Effluent Hardness samples shall be collected concurrently with samples for hardness -dependent metals (copper, zinc
and lead).
6. Whole Effluent Toxicity (WET) testing; Chronic — Limited (Ceriodaphnia dubia) 7-day pass/fail test at 38% effluent
concentration in January, April, July and October. In the event of "failure," re -sampling and re -testing are mandatory
[See A. (3.)].
7. Quarterly samples shall be taken 72 to 80 hours after introducing offsite filter backwash into the equalization tank. In
the event that this wastewater is not introduced within a given quarter, an effluent sample shall be taken, and the
Permittee shall note on the DMR/eDMR, "Offsite filter backwash was not introduced during this quarter."
8. If the quarterly value exceeds 4 times the annual average limit then, (a) the sampling frequency shall increase to
monthly and, (b) a written notification shall be submitted both to the Water Quality Permitting Section (NPDES)
and the Winston-Salem Regional Office (WSRO).
9. Uranium - A Weekly Average value can be determined from one quarterly sample, or by averaging multiple
samples analyzed during a given calendar quarter; sampling not to exceed seven (7) consecutive days during the
quarter.
Conditions:
1. The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
2. All samples shall accurately represent a typical discharge event.
3. This permit includes other Special Conditions [see A. (5.)].
Page 4of11

Permit NCO078115
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[NCAC 02B.0400 et seq., 02B.0500 et seq.]
During the period beginning upon expansion above 0.032 MGD and lasting until expiration, the
Permittee is authorized to discharge from Outfall 002. Such discharges shall be limited, monitored
and reported 1 by the Permittee as specified below:
LIIVIIT$ r
MONITQRING REQW
'EFFLUENT CHARACTERISTICS
Mo,ihly:
Daily
1VIea§urement
Sample y
�'Smple
jParacm-eter Code)
:..
Average
Maximum
Fr uen
egn
_-
Flow
50050
0.185 MGD
Continuous
Recording
I or E
Temperature CC)
00010
Daily
Grab
E
Total Residual Chlorine 3
50060
28 ug/L
2/Week
Grab
E
Fecal Coliform
(geometric mean)
31616
200/100 ml
400/100 ml
Weekly
Grab
E
Dissolved Oxygen
00300
Daily Average > 5.0 mg/L
Weekly
Grab
E
PH
00400
Not < 6.0 nor > 9.0
Weekly
Grab
E
Standard Units
BOD, 5-day (20°C)
C0310
5.0 mg/L
7.5 mg/L
Weekly
Composite
E
Total Suspended Solids
C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
E
Ammonia Nitrogen
q
C0610
2.0 mg/L
10.0 mg/L
Weekly
Composite
E
[NH3 as N] —Summer
Ammonia Nitrogen
q
C0610
4.0 mg/L
20.0 mg/L
Weekly
Composite
E
[NH3 as N] —Winter
Temperature CC)
00010
Weekly
Grab
U & D
Dissolved Oxygen
00300
Weekly
Grab
U & D
Hardness —Total as
[CaCO3 or (Ca + Mg)] 5
00900
Quarterly
Grab
U
Total Hardness —as
g
[CaCO3 or (Ca + Mg)]
00900
ri%N
0\`1 `'�
Quarterly
Composite
E
Total Copper 5
01042
"--:5
1 cl , 9
Quarterly
Composite
E
Total Lead 5
01051
5
;? ,
Quarterly
Composite
E
Total Zinc 5
01092
Quarterly
Composite
E
Total Chloride
00940
Quarterly
Composite
E
Whole Effluent Toxicity (WET) 6
(Chronic)
TGP3B
Quarterly
Grab
E
Combined radium-226 and
5 pCi/L
radium-228 (pCi/L) 711
11503
(report annual average)
Quarterly
Grab
E
C�c
Page 5of11

Permit NCO078115 '
LIIVIITS
MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTICS
Monthly
Daily
Measurement
Sample
Sample
[Parameter Code]
Average
: Maximum
Frequency
Type
Location2
Alpha emitters, excluding radon
and uranium
7'g
82077
15 al a
(report annual average)
Quarterly
Grab
E
(pCi/L)
Beta emitters, excluding
potassium40 and other naturally
50 pCi/L
occurring radionuclides
03520
(report annual average)
Quarterly
Grab
E
(PCB-) 7,8
Strontium-90 (pCi/L) 7'8
13501
(report 30 kly average)
Quarterly
Grab
E
Tritium (pCi/L) 7,8
82126
20,000 pCi/L
(report annual average)
Quarterly
Grab
E
Uranium (µg/L) 9
22708
(report weekly average)
Quarterly
Grab
E
Footnotes:
1. The Permittee shall submit Monthly Discharge Monitoring Reports (DMRs) electronically using DWR's
eDMR electronic submittal system [See Section A. (6.)].
2. E = Effiuent; I = Influent; U = Upstream, 20 feet from discharge point; D = Downstream, 0.01 mile from
discharge point.
3. Total Residual Chlorine (TRC) - The Division shall consider compliant all effluent TRC values reported
below 50 µg/L. However, the Permittee shall continue to record and submit all values reported by a North
Carolina certified test methods (including field certified), even if these values fall below 50 µg/L.
4. Summer = April Is' through October 31 11; Winter = November Is' through March 31 -4
5. Effluent Hardness samples shall be collected concurrently with samples for hardness -dependent metals (copper,
zinc and lead).
6. Whole Effluent Toxicity (WET) testing; Chronic — Limited (Ceriodaphnia dubia) 7-day pass/fail at 45% effluent
concentration during January, April, July and October. In the event of limit "failure," re -sampling and re -testing
are mandatory [See A. (4.)].
7. Quarterly samples shall be taken 72 to 80 hours after introducing offsite filter backwash into the equalization tank.
In the event that this wastewater is not introduced within a given quarter, an effluent sample shall be taken, and the
Permittee shall note on the DMR/eDMR, "Offsite filter backwash was not introduced during this quarter."
8. If the quarterly value exceeds 4 times the annual average limit then, (a) the sampling frequency shall increase to
monthly and, (b) a written notification shall be submitted both to the Water Quality Permitting Section
(NPDES) and the Winston-Salem Regional Office (WSRO).
9. Uranium - A Weekly Average value can be determined from one quarterly sample, or by averaging multiple
samples analyzed during a given calendar quarter; sampling not to exceed seven (7) consecutive days during the
quarter.
Conditions:
1. The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
2. All samples shall accurately represent a typical discharge event.
3. This permit includes other Special Conditions [see A. (5)].
Page 6of11

Permit NCO078115
A. (3.) CHRONIC TOXICITY - LIMITED (QUARTERLY) Phase 1 Flow
[I 5A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 38 % [0.032 MGD, Outfall 001 ] .
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 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised- December
2010) or subsequent versions. The tests will be performed during the months of January, April, July and
October. Effluent sampling for this testing 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 results in a failure, or 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 H Chronic Whole Effluent Toxicity Test
Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for
the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
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 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.
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 7of11

Permit NCO078115 `
A. (4.) CHRONIC TOXICITY - LIMITED (QUARTERLY) Phase 2 Flow
[15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration 45% [at 0.185 MGD, Outfall 0021.
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 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised- December
2010) or subsequent versions. 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 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 results in a failure or 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 H Chronic Whole Effluent Toxicity Test
Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for
the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
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 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.
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 8of11

Permit NCO078115
A. (5.) REOPENER CLAUSE
[G.S. 143-215.1(b)]
The Division of Water Resources may reopen this permit to increase monitoring, add additional parameters of
concern, and/or implement additional limits should effluent data or surface water data indicate potential
impacts to the environment, or should further information on radiological components become available.
A. (6.) ELECTRONIC REPORTING - 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. Reportina 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 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 DEQ / Division of Water Resources /Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
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.
Page 9of11

Permit NCO078115 '
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. ova /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
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:
Page 10 of 11

Permit NC0078115
hLtp://dgg.nc.gov/about/divisions/water-resources/edmr
4. Sip-natory 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. (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:
hLtp://dgg.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 [Supplements Section D. (631
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 11 of 11

AQUA North Carolina Inc.
Greystone Subdivision WWTP, Kernersville
Receiving Stream:
UT to Right Fork of Belews Creek [Dean Creek]
Latitude:
36° 10' 3.6" N
Longitude:
80o 05' 10.111w
Stream Class:
C
USGS Ouad:
Belews Creek, NC
Steam Segment:.
22-27-(2)
State Grid:
C18NE
Drainage Basin:
Roanoke River
Permitted Flow:
0.032 & 0.185 MGD
Sub -Basin:
03-02-01
HUC:
03010103
O North NPDES Permit NCO078115
Forsyth County

Winston-Salem Journal
Advertising Affidavit
P.O Box 3159
Winston-Salem, NC 27102
NCDENR/DWQ/POINT SOURCE BRANCH
ATTN: WREN THEDFORD
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Nu er,
3376309 �r `
Date
March 24, 2017
PO Number Order Category Description — - -
PUBLIC NOTICE 00D0330875 Legal Notices PUBLIC NOTICE North Carolina Environmental Management Commission/ NPDES Unit 161
Publisher of the
PUBLIC NOTICE
Winston-Salem Journal
North Carolina Environmental
Management Commission/
Before the undersigned, allotary Public of Guilford, North Carolina, duly commissioned,
NPDESlInft
1617 Mail Service Center
qualified, and authorized by law to administer oaths, personally appeared the Publisher
Ralelg4 NC 27699.1617
Representative who by being duly swom deposes and says: that he/she is the Publisher's
Notice W Intent to Issue i NPDES
Wastewater Permit
Representative of the Winston-Salem Journal, engaged in the publishing of a newspaper
P 68B P B �PaPe
known as Winston-Salem Journal, published, issued and entered as second class mail in the
The North Carolina Environmental
Management Commission proposes
City of Winston-Salem, in said County and State: that he/she is authorized to make this
ty tY
to issue a NPDES wastewater dis-
affidavit and swom statement: that the notice or other legal advertisement, a copy of which
charge permit to the person(s) listed
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
03/242017
the NC Division of Water Resources
(DWR) may hold a public hearing
should there be a significant degree
of public interest Please mail com-
ments and/or Information requests
and that the said newspaper in which such notice, paper document, or legal advertisement
to DWR at the above address. Inter-
ested persons may visit the DWR at
was published was, at the time of each and every such publication, a newspaper meeting all
512 N. Salisbury Street, Raleigh, NC
the requirements and qualifications of Section 1-597 of the General Statutes of North
Addi-
to review Information on file. permits
tional Information on NPDES permits
Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General
9B
and this notice may be found on our
Statutes of North Carolina
website: http://deq.nc-gov/about/di
visions/water-resources/water-
resources-permits/wastewater-
branch/npdes-wastewater/public-
notices,or by calling [phone].
AQUA of North Carolina, Inc. has ap-
srgnature ojperson making affidavit)
�
plied to renew permit NCO078115 for
'X\\
Greystone Subdivision W WTP dis-
charging treated wastewater to a
UTto East Fork of ws Creek
Kenersvllle, Forsythth County, Roa-
C
Swam to and subscribed before me the 24 day of March, 2017
mike River Basin
Flakt Products, Inc requested renew-
al of permit NCO085871 for the Fluid
LEA ANNE LAMB
Product Remediation Site in Forsyth
NOTARY PUBLIC
County; this permitted discharge is
STATE OF NORTH CAROLINA (Notary Public)
LCOMMISSIONEXPIRES
treated groundwater to Brushy Fork,
Pee River Basin.
6UILFORD COUNTY
j
Yadkin -Dee
OG-15
wsl: Marsh 24, x6u
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

Corporon, Joe
From: Ison, Laurie T. <[e-mail]>
Sent: Friday, April 28, 2017 12:07 PM
To: Corporon, Joe
Cc: Hennessy, John; Denard, Derek
Subject: RE: Review of DRAFT NPDES Permit NC0078115, Greystone Subdivision WWTP
Good afternoon Joe,
Aqua has no comments or objections to the draft modification. Should you receive any comments back from
the public notice, I would be happy to discuss if needed. Thank you for your assistance.
AQUA
BauN&hon
awa .Manage-Wwtew.Ne
aqua xe
704-489-9404 Ext57234
From: Corporon, Joe[mailto:[e-mail]]
Sent: Monday, April 10, 2017 9:19 AM
To: Ison, Laurie T.
Cc: Hennessy, John; Denard, Derek
Subject: RE: Review of DRAFT NPDES Permit NC0078115, Greystone Subdivision WWTP
Laurie —Thanks. I will pass on your request, and I will contact you if we have a problem or questions.
Respectfully,
Joe R. Corporon, L.G.
NCDEQ/DWR/NPDES
Archdale Building, 925C
1617 Mail Service Center
Raleigh, North Carolina 27699
From: Ison, Laurie T. [mailto:[e-mail]]
Sent: Monday, April 10, 2017 9:13 AM
To: Corporon, Joe <ioe.corporon@ncdenr.¢ov>
Cc: Melton, Michael A. <[e-mail]>; Hennessy, John <[e-mail]>
Subject: RE: Review of DRAFT NPDES Permit NC0078115, Greystone Subdivision WWTP
Good morning Joe,
I wanted to reach out in advance of the 30 day deadline for Aqua's response to advise we did review the
draft. However, we are waiting for a response from DWR as to the decision on the Harbor Estates permit

modification as it pertains to hardness. We may determine it is necessary to add the discharge from the
WTPs currently under review at Harbor Estates to the Greystone permit. I do not yet know when that
decision will be reached, therefore we may have to delay the decision for Greystone. I think it would be wise
to determine this now instead of submitting a second modification request right on the heels of the first. If
you have any questions or problems with this request, please let me know as soon as possible.
Thank you for your support and assistance.
AQUA
Baunfe 3aan
a%m m"aget-wectew Ne
aqua .ve
704-489-9404 Fist 57234
From: Corporon, Joe fmailto:ioe.corooronCalncdenr.gov]
Sent: Monday, March 27, 2017 2:42 PM
To: Ison, Laurie T.
Cc: Hennessy, John; Smith, Danny
Subject: Review of DRAFT NPDES Permit NC0078115, Greystone Subdivision WWTP
Lori - As promised, I've attached the draft for the subject site (also modified to include radiological parameters), sent to
Public Notice last Wednesday., I also include the Fact Sheet for your convenience.
Respectfully,
Joe R. Corporon, L. G.
NCDEQ/DWR/NPDES
Archdale Building, 925C
1617 Mail Service Center
Raleigh, North Carolina 27699

NCDEQ / DWR / NPDES
COMPLEX -EXPEDITED FACT SHEET - NPDES PERMIT�AL
NPDES Permit NCO078115 /
Joe R. Corporon, L.G., Compliance & Expedited Permitting Unit / 91
Table 1 - Facility Information
Applicam/Facility Name
Aqua North Carolina, Inc.
Greystone Subdivision WWTP, Class 2
Applicant Address
202 Mackenan Court, Cary, NC 27511
Facility Address
Pine Creek Road (north of) Kemersville, 27284
Permitted Flow (MGD)
Phase 1: 0.032 MGD, and Phase 2: 0.185 MGD
Type of Waste
Discharging 100% domestic < 1 MGD
Facility Class
WW-2
County
Forsyth
Permit Status
Renewal
Regional Office
WSRO
Stream Characteristics
Receiving Stream
UT to Right Fork Belews
Creek [Dean Creek]
Stream
Classification
C
Stream Segment
22-27-(2)
Drainage basin
Roanoke
Summer 7Q10 (cfs)
0.08 [Outfall 001]
Subbasin
03-02-01
Winter 7Q10 (cfs)
0.09 [Outfall 0011
Use Support
Statewide advisory for Hg
[HH for fish consumption]
30Q2 (cfs)
303(d) Listed
Average Flow (cfs)
2.65
State Grid
C18NE
IWC (%) Phase 1
38 % @ Outfall 001
Current discharge
IWC (%) Phase 2
45 % @ proposed 002
USGS Quad
Belews Creek, NC
Facility Summary — This facility is a privately owned minor W WTP (flow <1 MGD) receiving 100%
domestic wastewater, plus uranium -filter generated backwash from ion -exchange (IE) treatment of potable -
water. This extended -aeration treatment system is designed for a maximum capacity of 0.032 MGD, but is
permitted to expand to a 21 phase not -to -exceed 0.185 MGD. Expansion requires the Division's
Authorization to Construct (ATC), the abandonment of Outfall 001, and relocation of discharge to proposed
Outfall 002 (see site map). This W WTP utilizes the following treatment units:
• flow equalization (EQ) basin [includes trucked -in filter backwash from potable -
water treatment [ion -exchange technology] from Subdivision wells
• bar screen & flow Splitter
• dual (2) aeration basins
• dual (2) secondary clarifiers
• chlorine contact basin
• tablet chlorination
• tablet dechlorination chamber with aeration
• sludge holding tank
• effluent pump station
• effluent flow recording meter
Permit Flow Conditions — Effluent flow is permitted as Phase 1 and Phase 2 (see Part 1), and limited at
0.032 MGD [A. (1.)] and 0.185 MGD [A. (2.)]. Upon reaching flow at 80% of Phase 1 design capacity, the
Permittee shall have submitted plans and specifications to the Division to upgrade the treatment system in
support of its application to expand to Phase 2. Expansion requires the Division's Authorization to
Construct (ATC) permit, relocation of discharge to proposed Outfall 002 at Vance Road (see site map), and
subsequent submittal of an Engineer's Certification Form (see Supplement to Permit Cover Sheet).
Fact Sheet for Pertnit Renewal
Mar2017 — NPDES Permit NCO078115
Page 1

Table 2 - Effluent History / Summary — DMR Data Jan2014 through Dec2016
Parameter
Max
_ Min
Ave
n
Units / Comments
Flow
0.202
0.001
0.019
1035
MGD
Dissolved Oxygen
13.16
6
8.74
149
mg/L
Fecal Coliform
290
1
15.8
147
# / 100m1
TRC
48
< 2
15.5
296
µg/L
BOD 5
24.8
2
6.99
147
mg/L
pH
8.6
6.3
7.34
149
Standard Units
Ammonia
9.4
0.2
0.51
147
mg/L
TSS
42
0.4
8.51
147
mg/L
TP
6.36
—
1/cycle
mg/L
Renewal Summary — This renewal includes new parameters of concern (POCs) originating from potable -
water treatment systems utilizing ion -exchange (IE) technology including POCs governing radiological
uranium -filter backwash. Filter -backwash is generated by potable -water well treatment systems owned and
operated by AQUA. The Permittee proposes to introduce filter backwash episodically by tanker truck into
the WWTP's equalization basin for further treatment (rate: 1 gpm/60gph; proposed not -to -exceed 500 gpd).
OutfaU 001- Location Corrected — the location of Outfall 001 is hereby corrected to "25 feet east of the
treatment works" [LAT 360-10'-3.6" — LONG 80°-05'-10.1"], as documented (WSRO's Compliance
Evaluation Inspection, 23F62015). The Division notes that future permit limits should consider an
instream waste concentration (IWC) of 38.27 % for Outfall 001 (Phase 1 @ 0.032 MGD); and an IWC of
45.43 % for proposed Outfall 002 (Phased 2 @ 0.185 MGD), in accord with relative receiving -stream
flows.
Radiological POCs — Radiological POCs (see Table 3.) are added to Part I Section A. (L) and A. (2.) in
accordance with the Division's memo dated December 5, 2005 for Disposal Wastewater Associated with
Private Water Supply Wells (with potential radiology components). The Division applies permit limits to
these POCs without benefit of dilution.
North Carolina Narrative Standards 15A NCAC 02B .0211 (17) for Radiological POCs address maximum
contaminant levels (MCLs). The MCL of 30 µg//L for Uranium is based on EPA Federal Criteria [40 CFR
141.66]; see federal guidance and rules EPA 816-F-01-003 and 40 CFR Parts 9, 141, and 142.
Table 3: Radiological POCs
EFFLUENT
MONITORING REQUIREMENTS
CHARACTERISTICS
LIMITS
Measurement
Sample
Sample
[Parameter Codes]
. uenc
a
Location
Combined radium-226 and radium-228
5 pCi/L
(PCi/L)1' 2
11503
(report annual average)
Quarterly
Grab
Effluent
Alpha emitters, excluding radon and
15pCi/L
uranium (pCi/L)1 2
82077
(report annual average)
Quarterly
Grab
Effluent
Beta emitters, excluding potassium-40
and other naturally occurring
03520
50 pCi/L
(report annual average)
Quarterly
Grab
Effluent
radionuclides (pCi/L) i' 2
Strontium-90 (pCi/L)19 2
13501
(report 30 kly average)
Quarterly
Grab
Effluent
i 2
Tritium (pCi/L)
82126
20,000 pCi/L
(report annual average)Quarterly
Grab
Effluent
Uranium (µg/L)1' 3
22708
(report 30 kly average)
Quarterly
Grab
Effluent
Fact Sheet for Permit Renewal
Mar2017 -- NPDES Permit NCO078115
Page 2

See footnotes next page
Footnotes:
1. All quarterly samples shall be taken 72 to 80 hours after the introduction of offsite
wastewater into the equalization tank. In the event that an introduction of offsite
wastewater does not occur within a given quarter, a sample shall be taken of the effluent
and noted on the DMR as "no introduction of offsite wastewater occurred for this quarter."
2. If the quarterly value exceeds 4 times the annual average limit, then (a) the sampling
frequency shall increase to Monthly and (b), a written notification shall be sent to the
Water Quality Permitting Section and the Winston-Salem Regional Office (WSRO).
3. A Weekly Average value can be determined from one quarterly sample, or it can be
determined from the average of multiple samples taken during a period not to exceed seven
(7) consecutive days during the quarter.
Adding Water Treatment Plant (WTP) Strategy — This renewal combines the Division's WTP
strategies (140ct2009) with WWTP strategies to accommodate a proposed complex influent (Table 4).
This includes monitoring and limits for dissolved metals with their newly promulgated surface water
standards for freshwater [see permit Part I, A. (L) and A. (2)]. The WTP POCs Turbidity, Salinity and
Conductivity were not included, deemed insignificant because they propose to contribute a relatively
small episodic volume to the WWTP influent. Additional footnotes govern sampling.
Ouarterly Whole Effluent Toxicity (WET) Testing — In accordance with current strategies, WET
testing has been added to this proposed "complex waste stream" [15A NCAC 02B .0200 et seq.].
Table 4: POCs for Ion Exchange (IE) TechnoloE_v - Phase I at 0.032 MGD /IWC=38.27%
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING RE UIREMENTS
Monthly
Daily
Measurement
Sample
Sample
[Parameter Codes]
Averse
Maximum
Frequency
T e
Location
Total Hardness (mg/L)14
00900
Quarterly
Composite
Effluent &
Upstream
Total Copper (mg/L)1'2
01042
Quarterly
Composite
Effluent
Total Chloride (mg/L) 11,2
00940
Quarterly
Composite
Effluent
Total Zinc (mg/L)192
01092
Quarterly
Composite
Effluent
Chronic WET Testing 3
TGP3B
Quarterly
Grab
Effluent
Footnotes:
1. All test -method practical quantitation limits (PQL) must be sufficiently sensitive
considering the respective permit limit for each parameter of concern [see permit Part H.
Section D. (4.)].
2. All quarterly samples shall be taken 72 to 80 hours after the introduction of offsite
wastewater into the equalization tank. In the event that an introduction of offsite
wastewater does not occur within a given quarter, a sample shall be taken of the effluent
and noted on the DMR as "no introduction of offsite wastewater occurred for this quarter"
3. Phase I flow - Chronic Toxicity (Ceriodaphnia dubia) 7-day pass/fail test at 38% in
January, April, July and October [See A. (6.)].
Fact Sheet for Permit Renewal
Mar2017 -- NPDES Permit NCO078115
Page 3

NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards
The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently
approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft
permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as
approved.
Table 5. NC Dissolved Metals Water Quality Standards/Aquatic Life Protection
Parameter
Acute FW, µg/l
(Dissolved)
Chronic FW, µg/1
(Dissolved)
Acute SW, µg/l
(Dissolved)
Chronic SW, µg/1
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Table 3 Notes:
1. FW= Freshwater, SW= Saltwater
2. ulatiod = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life standards
for mercury and selenium are still expressed as Total Recoverable Metals due to bioaccumulative
concerns (as are all human health standards for all metals). It is still necessary to evaluate total
recoverable aquatic life and human health standards listed in 15A NCAC 2B.0200 (e.g., arsenic at
10 µg/1 for human health protection; cyanide at 5 µg/L and fluoride at 1.8 mg/L for aquatic life
protection).
Table 6. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/l
Cadmium, Acute
WER* (I. 136672-[In hardness](0.041838)) • e^{0.9151 [In hardness]-3.1485 }
Cadmium, Acute Trout waters
WER*{1.136672-[In hardness](0.041838)) • e^{0.9151[ln hardness]-3.6236}
Cadmium, Chronic
WER*{1.101672-[In hardness](0.041838)) • e^{0.7998[ln hardness]-4.4451 }
Chromium III, Acute
WER*0.316 • e^(0.8190[ln hardness]+3.7256)
Chromium III, Chronic
WER*0.860 • e^ {0.8190[ln hardness]+0.6848 )
Copper, Acute
WER*0.960 • e^(0.9422[ln hardness]-1.700)
Copper, Chronic
WER*0.960 • e^{0.8545[In hardness]-1.702)
Lead, Acute
WER*{1.46203-[In hardness](0.145712)) • e^{1.273[In hardness]-1.460)
Lead, Chronic
WER* { 1.46203-[In hardness](0.145712)) • e^{ 1.273[ln hardness]-4.7051
Fact Sheet for Permit Renewal
Mar2017 -- NPDES Permit NCO078115
Page 4

Nickel, Acute
WER*0.998 • e^(0.8460[ln hardness]+2.255)
Nickel, Chronic
WER*0.997 - e^(0.8460[In hardness]+0.0584)
Silver, Acute
WER*0.85 - e^(1.72[ln hardness]-6.59)
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 • e^(0.8473[ln hardness]+0.884)
Zinc, Chronic
WER*0.986 • e^{0.8473[ln hardness]+0.884)
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However, application of
the dissolved and hardness -dependent standards requires additional consideration in order to establish the
numeric standard for each metal of concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness and
so must be calculated case -by -case for each discharge.
Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The
discharge -specific standards must be converted to the equivalent total values for use in the RPA
calculations. We will generally rely on default translator values developed for each metal (more on that
below), but it is also possible to consider case -specific translators developed in accordance with established
methodology.
RPA Permitting Guidance/WOBELs for Hardness -Dependent Metals - Freshwater
The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern,
based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable
standards and the critical low -flow values for the receiving stream.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the
discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If
monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below
detection level), then the Division may remove the monitoring requirement in the reissued permit.
1. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q 10 (the spreadsheet automatically calculates
the 1 Q 10 using the formula 1 Q 10 = 0.843 (s7Q 10, cfs) 0.991
• Effluent hardness and upstream hardness, site -specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness -dependent metal of concern and for
each individual discharge, the Permit Writer must first determine what effluent and instream
(upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any
hardness data and contacts the Permittee to see if any additional data is available for instream
hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation using a
default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the
hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively.
Fact Sheet for Permit Renewal
Mar2017 -- NPDES Permit NCO078115
Page 5

If the use of a default hardness value results in a hardness -dependent metal showing reasonable
potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and upstream
hardness samples over a period of one week. The RPA is rerun using the new data.
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic) _
(Permitted Flow, cfs *Avg. Effluent Hardness, mgU + (s7Q 10. cfs *Avg. Upstream Hardness, mgU
(Permitted Flow, cfs + s7Q 10, cfs)
The Combined Hardness for acute is the same but the calculation uses the IQ 10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total recoverable
metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any have
been developed using federally approved methodology.
EPA default partition coefficients or the "Fraction Dissolved" converts the value for
dissolved metal at laboratory conditions to total recoverable metal at in -stream ambient
conditions. This factor is calculated using the linear partition coefficients found in The
Metals Translator. Guidance for Calculating a Total Recoverable Permit Limit from a
Dissolved Criterion (EPA 823-B-96-007, June 1996) and the equation:
Cdiss - 1
Ctotal 1 + { [Kp] [ss(i+a)] [10-6] }
Where:
ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used, and
Kpo and a = constants that express the equilibrium relationship between dissolved and
adsorbed forms of metals. A list of constants used for each hardness -dependent metal can
also be found in the RPA program under a sheet labeled DPCs.
4. The numeric standard for each metal of concern is divided by the default partition coefficient (or
site -specific translator) to obtain a Total Recoverable Metal at ambient conditions. In some cases,
where an EPA default partition coefficient translator does not exist (i.e. silver), the dissolved
numeric standard for each metal of concern is divided by the EPA conversion factor to obtain a
Total Recoverable Metal at ambient conditions. This method presumes that the metal is dissolved to
the same extent as it was during EPA's criteria development for metals. For more information on
conversion factors see the June, 1996 EPA Translator Guidance Document.
5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration
(permit limits) for each pollutant using the following equation:
Ca = (s7010 + Ow) (Cwgs) — (s7Q 10) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L)
Qw = permitted effluent flow (cfs, match s7Q 10)
Fact Sheet for Permit Renewal
Mar2017 -- NPDES Permit NC0078115
Page 6

s7Q10 = summer low flow used to protect aquatic life from chronic toxicity and human health
through the consumption of water, fish, and shellfish from noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background concentrations
Flows other than s7Q10 may be incorporated as applicable:
IQ 10 = used in the equation to protect aquatic life from acute toxicity
QA = used in the equation to protect human health through the consumption of water, fish,
and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern.
Data entered must have been taken within four and one-half years prior to the date of the permit
application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper
concentration of each pollutant. The Predicted Max concentrations are compared to the Total
allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds
the acute or chronic Total allowable concentrations, the discharge is considered to show reasonable
potential to violate the water quality standard, and a permit limit (Total allowable concentration) is
included in the permit in accordance with the U.S. EPA Technical Support Document for Water
Quality -Based Toxics Control published in 1991.
7. When appropriate, permit writers develop facility specific compliance schedules in accordance with
the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on 40 CFR
122.47 Compliance Schedule Requirements.
8. The Total Chromium NC WQS was removed and replaced with trivalent chromium and hexavalent
chromium Water Quality Standards. As a cost savings measure, total chromium data results may be
used as a conservative surrogate in cases where there are no analytical results based on chromium
III or VI. In these cases, the projected maximum concentration (95th %) for total chromium will be
compared against water quality standards for chromium III and chromium VI.
9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are inserted
into all permits with facilities monitoring for hardness -dependent metals to ensure the accuracy of
the permit limits and to build a more robust hardness dataset.
10. Table 7 - Hardness / Flow Values [in the absence of data] to be used in the Reasonable Potential
Analysis (RPA):
Parameter
Value
Comments (Data Source)
Average Effluent Hardness (mg/L)
25 m
Assumed (no data to date); added
[Total as, CaCO3 or (Ca+Mg)]
monitoring to create database
Average Upstream Hardness (mg1L)
25mg/L
Assumed (no data to date); added
[Total as, CaCO3 or (Ca+Mg)]
monitoring to create database
7Q10 summer (cfs)
0.08 cfs
Phase 1 flow [Outfall 001]
0.034 cfs
Phase 2 flow [Outfall 002]
1Q10 (cfs)
Permitted (MG
0.032 MGD
Phase 1 flow [Outfall 001]
0.185 MGD
Phase 2 flow [Outfall 002]
NPDES Peaftit Writer: Joe R/Corporolf, L.G.
Fact Sheet for Permit Renewal
Mar2017 — NPDES Permit NC0078115
Page 7

IWC Calculations V S
Facility: AQUA Breystone Subdivision WWTP
NC0078115
Prepared By: Joe Corporon 16Mar2017
Enter Design Flow (MGD): 0.032 Phase I flow
Enter s7Q10 (cfs): �C' 0.08 reverted to corrected Phase I location
r w7Q10 cfs): discharging 20 feet east W WTP t)ev` ua3 Q-6
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/1)
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS)
0.08
s7Q10 (CFS)
0.08
DESIGN FLOW (MGD)
0.032
DESIGN FLOW (MGD)
0.032
DESIGN FLOW (CFS)
0.0496
DESIGN FLOW (CFS)
0.0496
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/I)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
38.27
IWC (%)
38.27
Allowable Conc. (ug/I)
44
Allowable Conc. (mg/1)
2.3
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Fecal Coliform
w7Q10 (CFS)
0
Monthly Average Limit:
2001100m1
DESIGN FLOW (MGD)
0.032
(If DF>331; Monitor)
DESIGN FLOW (CFS)
0.0496
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
2.61
Upstream Bkgd (mg/1)
0.22
IWC (%)
100.00
Allowable Conc. (mg/1)
1.8
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/l, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/l
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
4. BAT for Minor Domestics: 2 mg/I (summer) and 4 mg/I (winter)
5. BAT for Major Municipals: 1 mg/I (year-round)
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
NPDES Server/Current Versions/WLA; TB 1/16/2009

IWC Calculations
Facility: AQUA Breystone Subdivision WWTP
NC0078115
Prepared By: Joe Corporon 09Mar2017 I
Enter Design Flow (MGD): �-" `I ee_! 1,
Enter s7Q10 (cfs): 0.3445
Enter w7Q10 cfs : 0.66
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/1)
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS)
0.3445
s7Q10 (CFS)
0.3445
DESIGN FLOW (MGD)
0.185
DESIGN FLOW (MGD)
0.185
DESIGN FLOW (CFS)
0.28675
DESIGN FLOW (CFS)
0.28675
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/I)
0.22
IWC (%)
45.43
IWC (%)
45.43 ✓
Allowable Conc. (ug/1)
37
Allowable Conc. (mg/1)
1.9
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Fecal Coliforrn
w7Q10 (CFS)
0.66
Monthly Average Limit:
20011o0m1
DESIGN FLOW (MGD)
0.185
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.28675
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
2.20
Upstream Bkgd (mg/1)
0.22
IWC (%)
30.29
Allowable Conc. (mg/1)
5.4
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
4. BAT for Minor Domestics: 2 mg/I (summer) and 4 mg/I (winter)
5. BAT for Major Municipals: 1 mg/I (year-round)
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
NPDES Server/Current Versions/WLA; TB 1/16/2009

IWC Calculations
Facility: AQUA Breystone Subdivision WWTP
NC0078115
Prepared By: e Corporon 09Mar2017 (_—
Enter Design Flo (MGD): 0.032 _ s
Enter w7Q10(cfs): 0.66 ;N1
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/1)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DES IG N FLOW (CFS)
STREAM STD (UGIL)
Upstream Bkgd (ug/1)
IWC (%)
Allowable Cone. (ugll)
Fecal Coliform
Monthly Average Limit:
(If DF >331; Monitor)
(If DF<331; Limit)
Dilution Factor (DF)
Ammonia (Summer)
Monthly Average Limit (mg NH3-IN/I)
0.3446 s7Q10(CFS)
0.032 DESIGN FLOW (MGD)
0.0496 DESIGN FLOW (CFS)
17.0 STREAM STD (MGIQ
0 Upstream Bkgd (mg/1)
1 . 9 IWC (%)
13 Allowable Cone. (mgll)
a (Winter)
Average Limit (mg NH3-N/1)
0.3446
0.032
0.0496
1.0
0.22
12.59
6.4
w7Q10 FS)
0.86
20o/10omi DESIGN OW (MGD)
0.032
DESIGN FL W (CFS)
0.0496
STREAM ST MGIL)
1.8
7.95 Upstream Bkg mg/I)
0.22
IWC (%)
6.99
Allowable Cone. ( 11)
22.8
Total Residual Chlorine
1. Cap Daily Max limit at 28 ugll to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Cone> 35 mg11, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mgA
3. Monthly Avg limit x 6 = Daily Max limit (Non-Munis); capped at 35 mgll
4. BAT for Minor Domestics: 2 mgA (summer) and 4 mg/I (winter)
5. BAT for Major Municipals: 1 mg11(year-round)
Fecal Coliform
1. Monthly Avg limitx 2 = 4001100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
N PDES ServerlCurrent Versions/WLA; TB 1/1 6Y2009
MAN

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO078115
PERMITTEE NAME: Rayco Utilities, Inc.
FACILITY NAME: Graystone Forest Wastewater Treatment Plant
Facility Status: Existing
Permit Status: Renewal
Major
Pipe No.: 001
Design Capacity:
Minor
0.040 MGD
Domestic (% of Flow):
Industrial (% of Flow):
100 %
c)o'10--
Comments:
et&&A Cep e-05
* (Previously Permit No. NC0051250. lapsed). \ ���.
C-R��
** STREAM INDEX: 22-27-3 or 4
RECEIVING STREAM:an unnamed tributary to Belews Creek
Class: C
Sub -Basin: 03-02-01
Reference USGS Quad: C18NE, Belews Creek (please attach)
County; Forsyth
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 1/31/92 Treatment Plant Class: 11
Classification changes within three miles:
Next class. chg. ca. 4.5 mi. to Class B.
Requested by: Jule Shanklin Date: 7/15/91
Prepared by: Date: 94
Reviewed by: 5 ) /Da . R-771f_
Modeler
Date Rec.
#
EAZ-
7- l6 V
6350
Drainage Area (mil ) 6.Hl Avg. Streamflow (cfs): O.
7Q10 (cfs) 0 Winter 7Q10 (cfs) O, of 30Q2 (cfs) o. 0 9
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream ✓ Location��-
Downstream ✓ Location 0. !? t,.tsduN,rfirr..
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
a 3
.23
NH3-N (mg/1)
/ CA.T.3
317 .
D.O. (mg/1)
S
TSS (mg/1)
3 0
o
F. Col. (/100 ml)
aov
Gov
pH (SU)
_
DI
TTrr%
Comments: Heter : uasmwiae t 5treamune wtA rue
Completed By Permits & Engineering
At Front Of Subbasin
L-;4
UWE
w��
aot7..t 39 S!. L
WG7

To: Jessica Miles, Environmental Program Manager
Public Water Supply Section, Division of Environmental Health
Through: Matt Matthews, Supervisor
Point Source Branch, Surface Water Protection Section
From: Susan A. Wilson, Supervisor
Western NPDES Program
Subject: Disposal of Wastewater Associated with Private Water Supply Wells
(with potential radiological components)
As you and your staff have stated in our previous meetings and discussions, due to EPA -
promulgated rule changes for sampling of drinking water, there is increased concern
regarding the presence of radiological components naturally occurring iri the
groundwater (and subsequently in drinking water associated with the groundwater
source). Entities who operate water supply wells are now subject to more stringent
limitations prior to distribution of drinking water. In order to comply with these more
stringent limitations, further treatment of the drinking water is likely necessary. A
result of further treatment will generate wastewater via backwaslung of ion exchange
units (or other treatment scenarios) which may contain radiological components (as well
as other parameters of concern) and require an NPDES permit, or modification of an
existing NPDES permit. The Division of Water Quality appreciates Public Water Supply
relaying this information, so that we can advise affected permittees on a course of action.
At this time, radiological data from the proposed wastewater sources is minimal.
However, the Division believes it has come to a consensus on how to proceed with
implementation of the radiological standards and future permitting of this wastewater
source, so that drinking water in private communities can be adequately treated and
surface water may be protected.
For most facilities, it appears that the wastewater generated from increased treatment
can be transferred to an existing wastewater treatment plant operated by the same
owner. From DWQ's perspective, this appears to be the preferred method of disposal
with the information currently available (and we encourage PWS to emphasize this
method). However, to accept this wastewater, the affected permittee will need to request
and provide information for a mayor modification of its existing NPDES permit. The data
would then be reviewed and submitted for public notice (as with any major modification
of an NPDES permit). An example of the potential permit requirements for this
modification are listed in Table 1.
North Carolina Division of Water Quality [phone]
1617 Mail Service Center FAX [phone]
Raleigh, North Carolina 27699-1617 On the Internet at http://h2o.enr.state.nc.us/

The limits or monitoring requirements may vary depending on the data submitted and
the radiological components present. The list in Table 1 includes all radiological
components for- which there are water quality standards or criteria. All modified permits
will also have a reopener clause to include additional parameters of concern or to
increase frequency of monitoring. As with any NPDES permit, please refer potential
applicants to the Point Source Branch so that we may answer specific questions.
At this point, DWQ will likely prohibit any application for a direct discharge to surface
waters, unless the applicant can thoroughly demonstrate that direct discharge is the
only feasible means of disposal and the limits in Table 1 can be met. In addition to the
parameters of concern listed in Table 1, the discharger may also be subject to the
monitoring required for discharges from ion exchange treatment. DWQ also prohibits
direct discharges from ion exchange treatment units into freshwater bodies, unless there
is ample dilution and the applicant can demonstrate that the limits can be met, as well
as demonstrate that there will be no adverse impact to the receiving stream. The
Division's guidance for various water treatment plant discharges can be found within the
NPDES website under Facility Specific Permitting Guidance) :
http: / /h2o.enr.state.nc.us/NPDES/documents.html#permittingdocs
The Division hopes the course of action outlined above will assist Public Water Supply in
decision making for existing and future drinking water supplies.
If you have any questions, please contact me at (919) 733 - 5083, ext. 510 or Toya Fields
at ext. 5 51.
cc: Rick Shiver, ADRO
Regional Office Supervisors/ Surface Water Protection
Central Files
NPDES Programs
Planning Section/Classifications and Standards
PERCS

n Table 1. Proposed Permit Conditions
Radiological Component 1
Sampling Frequency
Limit
Combined radium-226 and
Quarterly 2
5 pCu/L
radium-228
averse annual activity)
Alpha emitters
Quarterly 2
15 pCu/L
(including radium-226, but
(average annual activity)
excluding radon and uranium
Beta emitters
Quarterly 2
50 pCu/L
(gross beta activity; excluding
(average annual activity)
potassium-40 and other naturally
occurring radionuclides
Strontium-90
Quarterly 2
8 pCu/ L
averse annual activity)
Tritium
Quarterly 2
20,000 pCu/L
averse annual activity)
Uranium s 1
Quarterly
30 ug L(weekly average)
Footnotes:
1. Refer to 15A NCAC 2B .0200 for specific explanation of radiological components
(applicable to all surface waterbody classifications) .
2. Sampling frequency will increase to monthly should any one sample exceed four
times the average annual activity level. The permittee shall also notify the Point
Source Branch of the Surface Water Protection Section as well as the appropriate
regional office in writing, should this occur.
3.* Based on EPA Federal Criteria.
Reopener Clause:
The Division of Water Quality may reopen this permit to increase monitoring, add
additional parameters of concern, and/or implement additional limits should effluent
data or surface water data indicate potential impacts, or should further information on
radiological components become available.

AOUX-
Thomas J. Roberts, President and Chief Operating Officer
0:919.653.5770 • F:919.460.1788 • [e-mail]
April 25, 2016
NC Department of Environmental Quality
Division of Water Resources
Water Quality Permitting Section — NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Application for Permit Modification
Aqua North Carolina, Inc.
Greystone WWTP
NPDES No. NCO078115
Forsyth County
Gentlemen:
RECEIVEDINCDEUDWR
MAY 0 2 2016
Water Quality
Permitting Section
Attached are three (3) copies of the completed application Fonn D, a location map, a copy of the
sludge management plan and a check for the permit modification application processing fee
($ 260.00). This letter and attachments are our request to modify the subject permit to allow the
introduction of a maximum of 500 gallons per day of wastewater from several existing community
o% w 1 water treatment systems. The existing well water systems are all owned and operated by
Aqua North Carolina, Inc.
Each of these existing community well water systems has existing uranium removal filter systems. In
the past, the wastewaters derived from the backwashing of these systems have been collected in
existing tanks located on the well sites and periodically removed by a licensed commercial hauler
(tanker truck) for disposal at treatment facilities off site. However, the hauler has advised that he will
no longer be able to continue providing this disposal service. Therefore, Aqua North Carolina, Inc. is
requesting that this NPDES permit be tgodifiea to allow the collected uranium filter backwash
wastewater to be transported to the existing Greystone WWTP and introduced into the influent.
The uranium filter backwash wastewater will be ouglltt to the WWTP by tanker truck, offloaded
into a storage tank and fed slowly at a rate of_� an one gallon per minute by means of a manually
operated valve, into the WWTP influent. We have included an analysis of the collected uranium
backwash wastewater in Attachment 1 of the application.
202 MacKenan Court Cary, NC 27511 • AquaAmerica.com

Page Two
April 25, 2016
NC Department of Environmental Quality
Greystone WWTP
We appreciate your consideration of this request for modification. If you need any additional
information or assistance, please feel free to contact our engineer, Mr. J. Thurman Horne, P.E.,
Horizon Engineering & Consulting, Inc. (704-7884455.)
Si
Thomas J. Robert
President and Chief Operating Officer
cc: Laurie Ison
J. Thurman Home
RECEIVEDINCDEQIDWR
MAY 0 2 2016
Water Quality
Permitting Section

NPDES APPLICATION - FORM D
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MGD
Mail the complete application to:
N. C. DENR / Division of Water Quality, / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit C0078115
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
peld to ymm I o cn-eck Me boxes,•
1. Contact Information:
Owner Name
Aqua North Carolina, Inc.
Facility Name
Greystone Subdivision WWTP
Mailing Address
202 MacKenan Court B,ECEIVFD/NCDEQIDWR
city
Cary MAY A 4 2016
State / Zip Code
NC/27511 water atiality
Telephone Number
[phone] Permitting Section
Fax Number
[phone]
e-mail Address
[e-mail]
2. Location of facility producing discharge:
Check here if same address as above ❑�
Street Address or State
Road �CreeYc Road -North Kernersville
city Kernersville �—
State / Zip Code NC/27284
County Forsyth
3. Operator Information:
Name of the firm, public organization or other entity that operates the facility. (Note that this is not
referring to the Operator in Responsible Charge or ORC)
Name
Aqua North Carolina, Inc.
Mailing Address
202 MacKenan Court
City
Cary
State / Zip Code
NC/27511
Telephone Number
[phone]
Fax Number
[phone]
e-mail Address
[e-mail]
1 of 4 Form-D 11 /12

NPDES APPLICATION - FORM D
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MGD
4. Description of wastewater:
Facility Generating Wastewater(check all that applyf
Industrial ❑ Number of Employees
Commercial ❑ Number of Employees _
Residential X Number of Homes 128
Other ❑ Explain:
Describe the source(s) of wastewater (example: subdivision, mobile home park, shopping centers,
restaurants, etc.):
Domestic watewater from 128 residential connections.
Number of persons served: 320
This application is being submitted for a modification to to allow the existing wastewater treatment
facilities to receive a maximum of 500 gpd of backwash wastewater collected from nearby, existing
private community well water, uranium filtration systems. These existing community well water
systems are owned and operated by the applicant (Aqua North Carolina, Inc.)
The well water, uranium filter backwash wastewaters is collected and held in existing tanks at the well
sytems. This application requests the permission to periodically transport these collected uranium
backwash wastewaters via a tanker truck, to the existing Greystone Subdivision W WTP, where it will
be unloaded into a holding tank on site and introduced into the influent of the WWTP at a rate less
than 1 gpm and controlled by a manual vavle.
An analysis of the collected uranium filter backwash wastewaters from each of the existing community
well systems in included in Attachment 1.
5. Type of collection system
X Separate (sanitary sewer only) ❑ Combined (storm sewer and sanitary sewer)
6. Out fall Information:
Number of separate discharge points 1
Outfall Identification number(s) 001
Is the outfall equipped with a diffuser? ❑ Yes
7. Name of receiving stream(s) (NE a lic ts: Provide a map showing the exact location of each
outfallr
Right Fork Belews Creek in t Ya ' er Basin
S. Frequency of Discharge: X Contin6,us ❑ Intermittent
If intermittent:
Days per week discharge occurs: Duration:
9. Describe the treatment system
List all installed components, including capacities, provide design removal for BOD, TSS, nitrogen and
phosphorus. If the space provided is not sufficient, attach the description of the treatment system in a
separate sheet of paper.
2 of 4 Form-D 11112

NPDES APPLICATION - FORM D
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MGD
1 .®
0.032 MGD extended aeration wastewater treatment system consisting of:
Influent Pump station
Flow splitter
Bar Screen
Flow Equalization basin
Dual Aeration basins
Dual Secondary clarifiers
Sludge holding tank
Chlorine disinfection facilities (tablet)
Dechlorination facilities (tablet)
V-notch weir
Effluent flow recording meter
3 of 4 Form-D 11112

NPDES APPLICATION - FORM D
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MGD
10. Flow Information:
Treatment Plant Design flow 0.032 MGD
Annual Average daily flow 0.025 MGD (for the previous 3 years)
Maximum daily flow 0.097 MGD (for the previous 3 years)
11. Is this I aility located on Indian country?
❑Yes XNo
12. Effluent Data
NEW APPLICANTS: Provide data for the parameters listed. Fecal Coliform, Temperature and pH shall be grab
samples, for all other parameters 24-hour composite sampling shall be used. If more than one analysis is reported,
report daily maximum and monthly average. If only one analysis is reported, report as daily maximum.
RENEWAL APPLICANTS: Provide the highest single reading (Daily Maximum) and Monthly Average over
tho nn_ct .4F mnnthc fnr nnmm_eters currently in your permit. Mark other parameters "llt/A".
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
Biochemical Oxygen Demand (BODs)
33.4
5.4
mg/l
Fecal Coliform
290
9.2
#/ 100m1
Total Suspended Solids
12.7
5.5
mg/l
Temperature (Summer)
28
19.5
Deg. C
Temperature (Winter)
21.3
10.2
Deg. C
pH
8.4
7.1
s.u.
13. List all permits, construction approvals and/or applications:
Type Permit Number Type
Hazardous Waste (RCRA)
U1C (SDWA)
NPDES NCO078115
PSD (CAA)
Non -attainment program (CAA)
14. APPLICANT CERTIFICATION
NESHAPS (CAA)
Ocean Dumping (MPRSA)
Dredge or fill (Section 404 or CWA)
Other
Permit Number
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
North Carolina General Statute 143-215.6 (b)(2) states: Any person who Knowingly maKes any raise statement representation, or cerimcaum in any
application, record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management
Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method
required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be
guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001
provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.)
4 of 4 Form-D 11/12

ANC - Greystone Subdivision WWTP
NPDES Permit No. NCO078115
A ' tion for Permit Modification
fiver Ru Well System Uranium Filter Backwash
Sa esults
Parameter
Concentration
Units
Aluminum
268
ug/I
Iron
13000
ug/I
Manganese
154
ug/I
Copper
98.4
ug/I
Sodium
10100
ug/I
Zinc
241
ug/I
TDS
249
mg/I
TSS
43.7
mg/I
Total nitrogen
23.6
mg/I
Fluoride
ND
mg/I
Ammonia nitrogen
ND
mg/1
Total Kjeldahl nitrogen
ND
mg/I
Nitrogen, NO2 + NO3
23.6
mg/I
Phosphorous
0.51
mg/I
Chloride
12
mg/I
Gross Alpha
317
pCi/I
Gross Beta
226
pCi/I
Radium-226
5.87
pCi/I
Radium-228
0.627
pCi/I
Strontium-90
0.112
pCi/I
Tritium
28.6
pCi/I
Total uranium
75.9
ug/1
pH
17.7
1
S.U.
TRC
11.84
1
mg/I

ANC - Greystone Subdivision WWTP
NPDES Permit No. NCO078115
A 'on for Permit Modification
illard Oak Well System Uranium Filter Backwash
Samp a Results
Parameter
Concentration
Units
Aluminum
ND
ug/I
Iron
ND
ug/I
Manganese
ND
ug/I
Copper
ND
ug/I
Sodium
84100
ug/I
Zinc
21.6
ug/I
TDS
277
mg/1
TSS
ND
mg/1
Total nitrogen
0.15
mg/I
Fluoride
0.7
mg/I
Ammonia nitrogen
ND
mg/I
Total Kjeldahl nitrogen
ND
mg/1
Nitrogen, NO2 + NO3
0.15
mg/I
Phosphorous
ND
mg/I
Chloride
2.8
mg/I
Gross Alpha
11.2
pCi/I
Gross Beta
2.17
pCi/I
Radium-226
-0.127
pCi/I
Radium-228
0.618
jpCill
Strontium-90
-0.032
pCi/I
Tritium
94.4
pCi/I
Total uranium
8.51
ug/I
pH
7.9
s.u.
TRC
0.69
mg/1