WQ0000185_Final Permit_20231108

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
November 8, 2023
DONALD I. MCREE, JR. — COUNTY MANAGER
OCEAN SANDS WATER AND SEWER DISTRICT
153 COURTHOUSE ROAD — SUITE 302
CURRITUCK, NORTH CAROLINA 27929
Subject: Permit No. WQ0000185
Ocean Sands WWTP
High -Rate Infiltration System
Currituck County
Dear Mr. McRee,
In response to your permit minor modification request received on August 15, 2023, we are
forwarding herewith Permit No. WQ0000185 dated November 8, 2023, to Ocean Sands Water and Sewer
District for the construction and operation of the modified wastewater treatment facilities, as well as the
continued operation of the existing wastewater treatment and high -rate infiltration facilities.
Modifications to the subject permit are as follows:
➢ The Division has approved the replacement of the existing 3.8 million gallon per day (MGD)
channel grinder and 5.5 MGD fine screen (augur) with a primary 3 millimeter (mm) fine self-
cleaning automatic mechanical bar screen.
This permit is effective from the date of issuance through June 30, 2024, shall replace Permit No.
WQ0000185 issued on November 16, 2021, and is subject to the conditions and limitations therein. The
Permittee shall submit a renewal application no later than January 2, 2024.
Please pay attention to the monitoring requirements listed in Attachments A, B, and C for they may
differ from the previous permit issuance. Failure to establish an adequate system for collecting and
maintaining the required operational information may result in future non-compliance.
The Division has removed the following permit conditions since the last permit issuance dated
November 16, 2021:
➢ Old Condition IL3 — The Division has removed this condition.
➢ Old Condition 11.10 —The Division has removed this condition because the Permittee owns all
the high -rate infiltration sites.
D � North Carolina Department of Environmental Quality i Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
NOR�HCAROLINA
'.'roMMm 0­; /I 919,707,9000

Mr. Donald I. McRee, Jr.
November 8, 2023
Page 2 of 2
This permit can be contested as provided in Chapter 150B of the North Carolina General Statutes
by filing a Petition for a Contested Case Hearing (Petition) with the North Carolina Office of Administrative
Hearings (OAH) within 30 calendar days. Requirements for filing a Petition are set forth in Chapter 150B
of the North Carolina General Statutes and Title 26 of the North Carolina Administrative Code. Those
interested in filing may access additional information regarding the requirements for filing a Petition and
Petition forms at the OAH website or by calling the OAH Clerk's Office at [phone]. A parry filing
a Petition shall serve a copy of the Petition on the Department of Environmental Quality's Office of General
Counsel at 1601 Mail Service Center, Raleigh, NC 27699-1601. If the parry filing the Petition is not the
Permittee, then the party shall also serve the Permittee pursuant to G.S. 15013-23(a).
Included with this permit are Division -approved plans and specifications. If you need additional
information concerning this permit, please contact Elton Luong at [phone] or
elton.luongkdeq.nc.gov.
Sincerely,
�DocuyuSignedby-
Richard E. Rogers, Jr., Director
Division of Water Resources
cc: Currituck County Health Department (Electronic Copy)
Washington Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Michael Strader Jr., PE — Quible & Associates (Electronic Copy)
Operator Certification Program (Electronic Copy)
Laserfiche File (Electronic Copy)
Digital Permit Archive (Electronic Copy)

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENTAL QUALITY
RALEIGH
HIGH -RATE INFILTRATION SYSTEM PERMIT
Pursuant to the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended,
and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Ocean Sands Water and Sewer District
Currituck County
FOR THE
operation of a 600,000 gallon per day (GPD) wastewater treatment and high -rate infiltration facility
consisting of the:
continued operation and subsequent abandonment of the following Phase I facilities: a 3.8 million gallon
per day (MGD) channel grinder, a 5.5 MGD fine screen; and all associated piping, valves, controls, and
appurtenances; the
construction and operation of: a primary 3 millimeter (mm) fine self-cleaning automatic mechanical bar
screen to serve the 200,000 GPD Phase I Amphidrome wastewater treatment facility and the 400,000 GPD
Phase II and Phase III Amphidrome wastewater treatment facility; and all associated piping, valves,
controls, and appurtenances; the
construction and operation of an odor control system for the Phase II and Phase III sludge holding tanks
consisting of. two 15 horsepower (hp) blowers with 48 diffusers per tank (a total of 192 diffusers); and all
associated piping, valves, controls, and appurtenances; the
continued operation of a 200,000 GPD Phase I Amphidrome wastewater treatment facility consisting of. a
600,000 GPD flow equalization basin; a manual bar screen, three 50,000 gallon flow equalization chambers;
a 47,285 gallon primary clarifier; a 27,000 gallon main reactor dosing tank; four 13,990 gallon main
submerged attached -growth bioreactors (SAGB); a 7,000 gallon secondary SAGB; a 20,000 gallon and an
11,883 gallon clearwell unit; a 55 gallon chlorination tank; an electric -pulse pump; a 36,550 gallon and a
39,859 gallon sludge holding tank equipped with a 15 hp blower and 48 diffusers per tank; a flowmeter; an
auxiliary generator; and all associated piping, valves, controls, and appurtenances; the
continued operation of a 400,000 GPD Phase II and Phase III Amphidrome wastewater treatment facility
consisting of. two 47,285 gallon primary clarifiers with four 1 hp solids removal pumps; a 35,208 main
reactor dosing tank with eight 7.5 hp dosing pumps; a 49,424 gallon mudwell with four 1 hp solids removal
pumps and two 7.5 hp return pumps; eight 55,954 gallon main SAGB, two 20,000 gallon clearwells and
one 24,684 gallon clearwell with sixteen 6 hp backwash pumps, four 3 hp secondary reactor dosing pumps,
and four 3.8 hp secondary reactor backwash pumps; two 6,986 gallon secondary SAGB; one 55 gallon
chlorination plastic drum tank; an electric pulse pump; two 36,550 gallon sludge holding tanks with a 0.5
hp decant pump; two 39,859 gallon holding tanks; 20 chemical feed pumps; six 30 hp blowers; an effluent
flowmeter; a final dosing chamber with a 16,667 gallon working -volume; two 9.5 hp final dosing pumps;
a 759 kilovolt -amp (kVa) generator; and all associated piping, valves, controls, and appurtenances; the
WQ0000185 Version 3.7 Shell Version 230725 Page 1 of 11

continued operation of a 600,000 GPD high -rate infiltration facility consisting of. a 2.41 acre high -rate
infiltration field with 118 spray irrigation heads served by two 15 hp submersible dosing pumps; and all
associated piping, valves, controls, and appurtenances; and the
continued operation of a groundwater lowering system consisting of. a series of trenches; a pump station
located in the northeastern corner of the site that conveys groundwater from the groundwater lowering
system to an unnamed tributary into Currituck Sound; and all associated piping, valves, controls, and
appurtenances
to serve the Ocean Sands Water and Sewer District, with no discharge of wastes to surface waters, pursuant
to the application received on August 15, 2023, and in conformity with the Division -approved plans and
specifications considered a part of this permit.
This permit is effective from the date of issuance through June 30, 2024, shall replace Permit No.
WQ0000185 issued on November 16, 2021, and is subject to the following conditions and limitations:
I. SCHEDULES
1. Upon completion of construction and prior to operation of the permitted modifications, the Permittee
shall submit an engineering certification from a North Carolina licensed Professional Engineer
certifying that the permitted facility has been constructed pursuant to G.S. 143-215.1, Administrative
Code Title 15A Subchapter 02T, this permit, and the Division -approved plans and specifications. For
phased and partially certified facilities, the Permittee shall retain the responsibility to track further
construction approved under this permit and shall provide a final engineering certification upon project
completion. The Permittee shall submit the Engineering Certification via the Non -Discharge online
portal. [15A NCAC 02T .0116(a)]
2. The Permittee shall notify the Washington Regional Office, telephone number [phone], at least
two business days in advance of the initial operation of the constructed modifications so that the
Division can conduct a startup inspection. [15A NCAC 02T .0108(b)(1)(A)]
3. Prior to the operation of the modified facilities, the Permittee shall submit an amended Operation and
Maintenance Plan. The Permittee shall submit the amended Operation and Maintenance Plan via the
Non -Discharge online portal_ [15A NCAC 02T .0108(b)(1)(B), 02T .0707(a)]
4. If the permitted facilities change ownership or the Permittee changes its name, the Permittee shall
submit a permit modification request on Division -approved forms within 90 days of the change of
ownership. The Permittee shall comply with all terms and conditions of this permit until the Division
transfers the permit to the successor -owner. [G.S. 143-215.1(d3)]
5. The Permittee shall request renewal of this permit on Division -approved forms no later than January 2,
2024. [15A NCAC 02T .0105(b), 02T .01091
WQ0000185 Version 3.7 Shell Version 230725 Page 2 of 11

IL PERFORMANCE STANDARDS
The Permittee shall operate and maintain the subject wastewater treatment and high -rate infiltration
facilities so there is no discharge to surface waters, nor any contravention of groundwater or surface
water standards. In the event the facilities do not perform as designed, including the creation of
nuisance conditions due to improper operation and maintenance, or failure of the infiltration areas to
assimilate the effluent, the Permittee shall take immediate corrective actions, including Division -
required actions, such as the construction of additional or replacement wastewater treatment or disposal
facilities. [15A NCAC 02T .0108(b)(1)(A)]
2. This permit shall not relieve the Permittee of its responsibility for contravention of groundwater or
surface water standards resulting from the operation of this facility. [15A NCAC 02T .0108(b)(1)(A)]
3. Effluent quality shall not exceed the limitations specified in Attachment A. [ 15A NCAC 02T .0705(b)1
4. The Permittee shall not infiltrate effluent in exceedance of the hydraulic rates specified in Attachment
B. [15A NCAC 02T .0108(b)(1)(A)]
For high -rate infiltration sites originally permitted on or after December 30, 1983, the Division has
established the compliance boundary 250 feet from the infiltration area boundary or 50 feet within the
property boundary, whichever is closest to the infiltration area boundary. Any exceedance of
groundwater standards at or beyond the compliance boundary shall require the Permittee to take
corrective action. The Division shall note any Division -approved relocation of the compliance
boundary in Attachment B. The Division shall consider multiple contiguous properties under common
ownership and permitted for use as a disposal system as a single property regarding the determination
of a compliance boundary. [15A NCAC 02L .0106(e), 02L .0107(b), 02L .0107(c), 02L .0107(fl, 02T
.0105 h
6. The Division has established the review boundary midway between the compliance boundary and the
infiltration area boundary. Any exceedance of groundwater standards at or beyond the review boundary
shall require the Permittee to take preventative action. [ 15A NCAC 02L .0106(d), 02L .01081
7. The Permittee shall notify the Division of any sale or transfer of property affecting a compliance
boundary (i.e., parcel subdivision). [15A NCAC 02L .0107(1)]
8. The Permittee or any landowner who owns land within the compliance boundary shall not construct
any water supply wells within the compliance boundary. [ 15A NCAC 02L .0107(i)1
WQ0000185 Version 3.7 Shell Version 230725 Page 3 of 11

9. The Permittee shall operate and maintain the permitted facilities pursuant to the following setbacks:
a. The Division permitted modifications to the infiltration sites on February 18, 2002, with an
application received on May 21, 2001. The setbacks for high -rate infiltration sites originally
permitted or modified with an application received from February 1, 1993, through August 31,
2006, are as follows (all distances in feet):
b
i. Each private or public water supply source:
100
ii. Surface waters:
200
iii. Groundwater lowering ditches:
200
iv. Surface water diversions (upslope):
200
v. Surface water diversions (downslope):
200
vi. Each well with exception of monitoring wells:
100
vii. Each property line:
50 1
viii. Top of slope of embankments or cuts of two feet or more in vertical height:
100
ix. Each water line:
10
x. Each swimming pool:
100
xi. Public right of way:
50
xii. Nitrification field:
20
xiii. Each building foundation or basement:
15
' Setbacks to property lines are not applicable when the Permittee, or the entity from which the
Permittee is leasing, owns both parcels separated by the property line.
[ 15A NCAC 02H .0219(i)(5)]
The Division permitted the Phase I treatment units on May 29, 2015, with an application received
on December 18, 2014. The Division originally permitted the Phase II and III treatment units on
July 17, 2017, with an application received on May 12, 2017. The setbacks for treatment and
storage units originally permitted or modified with an application received from September 1, 2006,
through August 31, 2018, are as follows (all distances in feet):
i. Each habitable residence or place of assembly under separate ownership:
1001
ii. Each private or public water supply source:
100
iii. Surface waters:
50
iv. Each well with exception of monitoring wells:
100
v. Each property line:
50 2, 3
' Habitable residences or places of assembly under separate ownership constructed after the
Division originally permitted or subsequently modified the facilities are exempt from this
setback.
2 Setbacks to property lines are not applicable when the Permittee, or the entity from which the
Permittee is leasing, owns both parcels separated by the property line.
3 Pursuant to a settlement agreement recorded in the Currituck County Register of Deeds,
reduced setbacks from the treatment units to any property line are as follows:
Parcel No.
Deed Book / Page
Setback
Easement
Open spaces on previously recorded plats
230 / 600
0 feet
50 feet
Sections D, E, F, H, I, J, K, L, N, P, Q, R, and G.
[ 15A NCAC 02T .0706(d). 02T .0706(e). 02T .0706(f), 02T .070660]
WQ0000185 Version 3.7 Shell Version 230725 Page 4 of 11

III. OPERATION AND MAINTENANCE
1. The Permittee shall operate and maintain the subject facilities as anon -discharge system. [15A NCAC
02T .0101]
2. The Permittee shall maintain an Operation and Maintenance Plan, which shall include:
a. A description of the operation of the system in sufficient detail to show what operations are
necessary for the system to function and who shall conduct the operations.
b. A description of the anticipated maintenance of the system.
c. Provisions for safety measures, including restriction of access to the site and equipment.
d. Spill control provisions that include response to upsets and bypasses, including control,
containment, and remediation; and contact information for personnel, emergency responders, and
regulatory agencies.
[ 15A NCAC 02T .0707(a)1
3. Upon the Water Pollution Control System Operators Certification Commission's (WPCSOCC)
classification of the subject non -discharge facilities, the Permittee shall designate and employ a certified
Operator in Responsible Charge (ORC), and one or more certified operators as Back-up ORCs. The
ORC or its Back-up shall operate and visit the facilities as required pursuant to 15A NCAC 08G .0204
and 08G .0205. [ 15A NCAC 02T .0117]
4. The Permittee shall take measures to prevent effluent ponding in or runoff from the infiltration area.
[ 15A NCAC 02T .0707(c)1
5. The Permittee shall test and calibrate the infiltration equipment once per permit cycle. [15A NCAC
02T .0707(d)]
6. The Permittee shall only infiltrate treated effluent from the Ocean Sands WWTP onto the sites listed in
Attachment B. [15A NCAC 02T .07011
7. The Permittee shall not allow vehicles or heavy machinery on the infiltration area, except during
equipment installation or maintenance activities. The Permittee shall take caution to protect the
integrity of the infiltrative area. [ 15A NCAC 02T .0707(e)]
8. The Permittee shall prohibit public access to the wastewater treatment, storage, and infiltration
facilities. [15A NCAC 02T .0705(p)]
9. The Permittee shall dispose of or utilize generated residuals in a Division -approved manner. [15A
NCAC 02T .0708, 02T .1101].
10. The Permittee shall not divert or bypass untreated or partially treated wastewater from the subject
facilities. [15A NCAC 02T .0705(i)]
11. The Permittee shall establish and maintain a protective vegetative cover on all berms, pipe runs, erosion
control areas, surface water diversions, and earthen embankments (i.e., the outside toe of the
embankment to the maximum allowable temporary storage elevation on the inside of the embankment).
The Permittee shall remove all trees, shrubs, and other woody vegetation from earthen dikes and
embankments. The Permittee shall keep all earthen embankments mowed or otherwise controlled and
accessible. [ 15A NCAC 02T .0707(a)]
12. The Permittee shall test and calibrate metering equipment annually. [15A NCAC 02T .0707(d)]
13. The Permittee shall provide and maintain onsite an automatically activated standby power source
capable of powering all essential treatment units. If the Permittee employs a generator as an alternate
power supply, the Permittee shall test it weekly. [15A NCAC 02T .0705(k)]
WQ0000185 Version 3.7 Shell Version 230725 Page 5 of 11

14. The Permittee shall clean the infiltration areas once per permit cycle to remove deposited materials that
may impede the infiltration process. The Permittee shall maintain cleaning records at the facility for
eight years and shall make them available to the Division upon request. Prior to each cleaning, the
Permittee shall notify the Washington Regional Office, telephone number [phone]. [15A
NCAC 02T .0707(h)]
IV. MONITORING AND REPORTING
1. The Permittee shall conduct and report any Division -required monitoring, including the monitoring of
groundwater, surface water or wetlands, waste, wastewater, residuals, soil, treatment processes, lagoon
or storage ponds, and plant tissue, if necessary to evaluate this facility's impact on groundwater and
surface water. [ 15A NCAC 02T .0108(c)]
2. A Division -certified laboratory shall conduct all analyses for the required parameters specified in
Attachments A and C. Parameters measured on -site with in -line metering equipment are exempt from
a Division -certified laboratory analysis. [15A NCAC 02H .0805]
3. The Permittee shall continuously monitor flow through the treatment facility and report daily flow
values on Form NDMR. Facilities with a permitted flow of less than 10,000 GPD may estimate its
flow from water usage records provided the water source has a metering device. [15A NCAC 02T
.0105 k , 02T .0108(c)]
4. The Permittee shall monitor the treated effluent at the frequencies and locations for the parameters
specified in Attachment A. [ 15A NCAC 02T .0105(k), 02T .0108(c)1
5. The Permittee shall maintain records tracking the amount of effluent infiltrated, which shall include the
following information for each infiltration site listed in Attachment B:
a. Date of infiltration.
b. Volume of effluent infiltrated.
c. Site infiltrated.
d. Length of site infiltration time.
e. Continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings.
f Continuous monthly and year-to-date loadings for any non -hydraulic parameter specifically
limited in Attachment B.
g. Weather conditions.
[ 15A NCAC 02T .0108(c)]
6. On or before the last day of the month following the previous month's sampling, the Permittee shall
submit monitoring data (as specified in Conditions IV.3 and IVA) on Form NDMR for each PPI and
operation and disposal records (as specified in Condition IV.5) on Form NDAR-2 for every site in
Attachment B. If no activities occurred during the monitoring month, the Permittee shall still submit
monitoring reports documenting the absence of the activity. The Permittee shall submit the reports via
the Non -Discharge monitoring report portal. [15A NCAC 02T .0105(1)]
7. Pursuant to G.S. 143-215.1C(a), the Permittee shall provide to its users and the Division an annual
report summarizing the performance of the wastewater treatment and infiltration facility and the extent
to which the facility has violated this permit, or federal or state laws, regulations, or rules related to the
protection of water quality. The Permittee shall prepare this report on either a calendar or fiscal year
basis and shall submit it no later than 60 days after the end of the calendar or fiscal year. The Permittee
shall submit the annual report via the Non -Discharge online portal. [G.S. 143-215.1C(a)1
WQ0000185 Version 3.7 Shell Version 230725 Page 6 of 11

8. The Permittee shall maintain records of all residuals removed from this facility. The Permittee shall
maintain these records for eight years and shall make them available to the Division upon request.
These records shall include:
a. Name of the residuals hauler.
b. Non -Discharge permit number authorizing the residuals disposal, or a letter from a municipality
agreeing to accept the residuals.
c. Residuals hauling date.
d. Volume of residuals removed.
[ 15A NCAC 02T .0708(b)]
9. The Permittee shall keep a log of all maintenance done at this facility. The Permittee shall maintain
this log for eight years and shall make it available to the Division upon request. This log shall include:
a. Date of flow measurement device calibration.
b. Date of infiltration equipment calibration.
c. Visual observations of the plant and plant site.
d. Record of preventative maintenance (e.g., changing of equipment, adjustments, testing,
inspections, cleanings, etc.).
e. Date and results of the alternate power supply testing.
[ 15A NCAC 02T .0707(i)]
10. The Permittee shall sample monitoring wells MW-4, MW-5, MW-6, MW-7, and MW-9 at the
frequencies and for the parameters specified in Attachment C. [ 15A NCAC 02T .0105(m)]
11. On or before the last day of the month following the previous month's sampling, the Permittee shall
submit a Compliance Monitoring Form (GW-59) and its associated laboratory analyses for each
monitoring well in Attachment C. The Permittee shall submit the Compliance Monitoring Forms via
the Non -Discharge monitoring report portal_ [15A NCAC 02T .0105(m)]
12. Noncompliance Notification:
The Permittee shall report to the Washington Regional Office, telephone number [phone],
within 24 hours of first knowledge of the following:
a. Treatment of wastes abnormal in quantity or characteristic, including the known passage of a
hazardous substance.
b. Any process unit failure (e.g., mechanical, electrical, structural, etc.) that makes the facility
incapable of adequate wastewater treatment.
c. Any facility failure resulting in a discharge to surface waters.
d. Any time self -monitoring indicates the facility has gone out of compliance with its permit
limitations.
e. Ponding in or runoff from the infiltration sites.
Emergencies requiring reporting outside normal business hours shall call the Division's Emergency
Response personnel at the telephone number [phone]. All noncompliance notifications shall
file a written report to the Washington Regional Office within five days of first knowledge of the
occurrence, and this report shall outline the actions proposed or taken to ensure the problem does not
recur. [15A NCAC 02T .0108(b)(1)(A)1
WQ0000185 Version 3.7 Shell Version 230725 Page 7 of 11

V. INSPECTIONS
1. The Permittee shall perform inspections and maintenance to ensure proper operation of the wastewater
treatment and infiltration facilities. [15A NCAC 02T .0707(i)]
2. The Permittee shall inspect the wastewater treatment and infiltration facilities to prevent malfunctions,
facility deterioration, and operator errors that may result in discharges of wastes to the environment,
threats to human health, or public nuisances. The Permittee shall maintain an inspection log that
includes the date and time of inspection, observations made, and maintenance, repairs, or corrective
actions taken. The Permittee shall maintain this inspection log for eight years from the date of the
inspection and shall make this log available to the Division upon request. [15A NCAC 02T .0707(i),
02T .0707(i)]
Division -authorized representatives may, upon presentation of credentials, enter and inspect any
property, premises, or place related to the permitted wastewater treatment and infiltration facilities at
any reasonable time for determining compliance with this permit. Division -authorized representatives
may inspect or copy records maintained under the terms and conditions of this permit and may collect
influent, treatment process water, effluent, residual, soil, plant tissue, groundwater, or surface water
samples. [G.S. 143-215.3(a)(2)1
VI. GENERAL
The Permittee's failure to comply with this permit's conditions and limitations may subject the
Permittee to a Division enforcement action. [G.S. 143-215.6A, 143-215.6B, 143-215.6C]
2. This permit is effective only for the nature and volume of wastes described in the permit application
and Division -approved plans and specifications. [G.S. 143-215.1(d)]
There are no variances to administrative codes or general statutes governing the construction or
operation of the permitted facilities unless the Permittee specifically requested a variance in the
application and the Division approved the variance as noted in this permit's facility description. [15A
NCAC 02T .0105(b)]
4. This permit does not exempt the Permittee from complying with all statutes, rules, regulations, or
ordinances that other jurisdictional government agencies (e.g., local, state, and federal) may require.
[15A NCAC 02T .0 1 08(b)(1)(A)]
5. The Permittee shall retain this permit and the Division -approved plans and specifications for the life of
the permitted facilities. [15A NCAC 02T .0105(o), 02T .0116(d)]
6. The Permittee shall comply with all permit conditions and requirements until the proper closure of the
permitted facilities, or until another appropriate authority permits the facilities. [15A NCAC 02T
.0105 ]
WQ0000185 Version 3.7 Shell Version 230725 Page 8 of 11

7. This permit is subject to revocation or modification upon 60-day notice from the Division Director in
whole or part for:
a. Violation of any terms or conditions of this permit or 15A NCAC 02T.
b. Obtaining a permit by misrepresentation or failure to disclose all relevant facts.
c. The Permittee's refusal to allow authorized Department employees upon presentation of
credentials:
I. To enter the Permittee's premises where a system is located or where the Permittee keeps any
Division -required records under the terms and conditions of this permit.
ii. To have access to any permit -required documents and records.
iii. To inspect any monitoring equipment or method as required in this permit.
iv. To sample any pollutants.
d. The Permittee's failure to pay the annual fee for administering and compliance monitoring.
e. A Division determination that the conditions of this permit conflict with the North Carolina
Administrative Code or General Statutes.
[ 15A NCAC 02T .01101
8. Unless the Division determines that the Permittee needs a permit modification for the construction of
facilities to resolve non-compliance with any environmental statute or rule, or the Division Director
grants a variance, expansion of the permitted facilities shall not occur if any of the following apply:
a. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has been convicted of
environmental crimes under G.S. 143-215.613 or under Federal law that would otherwise be
prosecuted under G.S. 143-215.6B, and the Permittee or any parent, subsidiary, or other affiliate of
the Permittee has abandoned or exhausted all appeals of this conviction.
b. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has previously abandoned
a wastewater treatment facility without properly closing the facility in accordance with its permit
or 15A NCAC 02T.
c. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has not paid a civil
penalty, and the Permittee or any parent, subsidiary, or other affiliate of the Permittee has
abandoned or exhausted all appeals of this penalty.
d. The Permittee or any parent, subsidiary, or other affiliate of the Permittee is currently not compliant
with any compliance schedule in a permit, settlement agreement, or order.
e. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has not paid an annual
fee pursuant to 15A NCAC 02T .0105(e)(2).
[ 15A NCAC 02T .0120(b), 02T .0120(d)]
WQ0000185 Version 3.7 Shell Version 230725 Page 9 of 11

9. Unless the Division Director grants a variance, the Division shall not renew this permit if the Permittee
or any affiliation has not paid an annual fee pursuant to 15A NCAC 02T .0105(e)(2). [15A NCAC 02T
.0120 c , 02T .0120(d)]
10. The Permittee shall pay an annual fee for each year of the term of this permit pursuant to the schedule
in G.S. 143-215.31)(a). The Permittee shall continue to pay annual fees for any facility operating on
an expired permit that the Division has not rescinded or revoked. [ 15A NCAC 02T .0105(e)(2)]
Permit issued this the 8` day of November 2023
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
DocuSigned by:
D1043082680C483...
Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Permit Number WQ0000185
WQ0000185 Version 3.7 Shell Version 230725 Page 10 of 11

Permit No. WQ0000185 High -Rate Infiltration System
Ocean Sands Water and Sewer District November 8, 2023
Ocean Sands WWTP Currituck County
ENGINEERING CERTIFICATION
❑ Partial ❑ Final
I, , as a duly licensed North Carolina Professional
Engineer, having ❑ periodically / ❑ fully observed the construction of the permitted modifications, do
hereby state to the best of my abilities that the facility was constructed in compliance with G.S. 143-215.1,
Administrative Code Title 15A Subchapter 02T, this permit, and the Division -approved plans and
specifications.
Documentation of any variation to this permit, and the Division -approved plans and specifications, is in the
attached as -built drawings.
Description of variations:
Professional Engineer's Name
Firm Name Firm No.
Address
City StaME& Zip Code
Telephone AMEEma]Seal, Signature, and Date
THE PERMITTEE SHALL SUBMIT THE COMPLETED ENGINEERING CERTIFICATION, INCLUDING
ALL SUPPORTING DOCUMENTATION, VIA THE NON -DISCHARGE ONLINE PORTAL.
WQ0000185 Version 3.7 Shell Version 230725 Page 11 of 11

THIS PAGE BLANK

ATTACHMENT A — LIMITATIONS AND MONITORING REQUIREMENTS
Ocean Sands Water and Sewer District
PPI 001— WWTP Effluent
Certification Date: November 8, 2023
Permit Number: WQ0000185 Version: 3.7
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PCs
Code
Parameter Description
Units of
Measure
Monthly Monthly
Average Geometric Mean
Daily Minimum
Daily Maximum
Measurement
Frequency
Sample
Type
00310
BOD, 5-Day (20 °C)
mg/L
10
2 x Week
Composite
00940
Chloride (as Cl)
mg/L
3 x Year'
Composite
50060
Chlorine, Total Residual
mg/L
5 x Week
Grab
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
14
2 x Week
Grab
50050
Flow, in Conduit or thru Treatment Plant
GPD
60Q000
Continuous
Recorder
00610
Nitrogen, Ammonia Total (as N)
mg/L
4
2 x Week
Composite
00625
Nitrogen, Kjeldahl, Total (as N)
mg/L
2 x Week
Composite
00620
Nitrogen, Nitrate Total (as N)
mg/L
10
2 x Week
Composite
00600
Nitrogen, Total (as N)
mg/L
2 x Week
Composite
00400
pH
su
5 x Week
Grab
00665
Phosphorus, Total (as P)
mg/L
2 x Week
Composite
70300
Solids, Total Dissolved — 180 °C
mg/L
3 x Year 1
Composite
00530
Solids, Total Suspended
mg/L
15
2 x Week
Composite
1. The Permittee shall conduct 3 x Year sampling in March, July, and November.
WQ0000185 Version 3.7 Attachment A Page 1 of 2

ATTACHMENT A — LIMITATIONS AND MONITORING REQUIREMENTS
Ocean Sands Water and Sewer District
PPI 002 — Surface Water Monitoring of Groundwater Lowering System (36.323611°,-75.816389°)
Certification Date: November 8, 2023
Permit Number: WQ0000185 Version: 3.7
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PCs
Code
Parameter Description
Units of
Measure
Monthly
Average
Monthly Daily Minimum Daily Maximum
Geometric Mean
Measurement
Frequency
Sample
Type
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
Monthly
Grab
50050
Flow, in Conduit or thru Treatment Plant
GPD
Continuous
Recorder
00610
Nitrogen, Ammonia Total (as N)
mg/L
Monthly
Grab
00620
Nitrogen, Nitrate Total (as N)
mg/L
Monthly
Grab
00665
Phosphorus, Total (as P)
mg/L
Monthly
Grab
1. The Permittee shall monitor flow via the existing variable area velocity flow meter inside the discharge pipe at the groundwater lowering system.
WQ0000185 Version 3.7 Attachment A Page 2 of 2

ATTACHMENT B — APPROVED LAND APPLICATION SITES AND LIMITATIONS
Ocean Sands Water and Sewer District
Certification Date: November 8, 2023
Permit Number: WQ0000185 Version: 3.7
INFILTRATION AREA INFORMATION
APPLICATION LIMITATIONS
Net
Dominant
Site
Owner
Parcel No.
County
Latitude
Longitude
Parameter
Rate
Units
Acreage
Soil Series
1
Ocean Sands Water and
0116000005B0000
Currituck
36.322990'
-75.814016°
2.41
NhC — Newhan-Corolla
01284 —Non-Discharge Application Rate
7.65
GPD/ft2
Sewer District
Total:
2.41
WQ0000185 Version 3.7 Attachment B Page 1 of 1

THIS PAGE BLANK

ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS
Ocean Sands Water and Sewer District
Monitoring Wells: MW-4, MW-5, MW-6, MW-7, and MW-9
Certification Date: November 8, 2023
Permit Number: WQ0000185 Version: 3.7
GROUNDWATER CHARACTERISTICS
GROUNDWATER STANDARDS
MONITORING REQUIREMENTS
PCS Code
Parameter Description
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
00680
Carbon, Total Organic (TOC)
mg/L
3 x Year
Grab
1,6
00940
Chloride (as Cl)
250
mg/L
3 x Year
Grab
1
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
3 x Year
Grab
1
00610
Nitrogen, Ammonia Total (as N)
1.5
mg/L
3 x Year
Grab
1
00620
Nitrogen, Nitrate Total (as N)
10
mg/L
3 x Year
Grab
1
00400
pH
6.5-8.5
su
3 x Year
Grab
1, 2
00665
Phosphorus, Total (as P)
mg/L
3 x Year
Grab
1
70300
Solids, Total Dissolved - 180 °C
500
mg/L
3 x Year
Grab
1
GWVOC
Volatile Compounds (GW)
Present: Yes/No
Annually
Grab
1, 4, 5, 6
82546
Water Level, Distance from measuring point
feet
3 x Year
Calculated
1, 2, 3
1. The Permittee shall conduct 3 x Year monitoring in March, July, and November, and Annual monitoring in November.
2. The Permittee shall measure the water levels prior to purging the wells. The Permittee shall measure the depth to water in each well from the surveyed point on the top of the casing. The Perminee
shall measure pH after purging and prior to sampling for the remaining parameters.
3. The Permittee shall survey the measuring points (top of well casing) of all monitoring wells to provide the relative elevation of the measuring point for each monitoring well. The Permittee shall
survey the measuring points (top of casing) of all monitoring wells relative to a common datum.
4. Volatile Organic Compounds (VOC) — Analyze by one or more of the following methods:
a. Standard Method 6200 B-2011, PQL at 0.5 �tg/L or less
b. Standard Method 6200 C-2011, PQL at 0.5 �tg/L or less
c. SW-846 Method 8021 B, Low Concentration, PQL at 0.5 gg/L or less
d. SW-846 Method 8260 D, Low Concentration, PQL at 0.5 gg/L or less
e. Another method with prior approval by the Water Quality Permitting Section Chief
Any method used shall meet the following qualifications:
a. A Division -certified laboratory shall run any method used.
b. The method used shall include all the constituents listed in Table 6200:I of Standard Methods.
c. The method used shall provide a PQL of 0.5 �tg/L or less supported by laboratory proficiency studies as required by the Division's Laboratory Certification Branch. A Division -certified
laboratory shall qualify (estimate) and report any constituents detected above the MDL but below the PQL of 0.5 �tg/L.
5. If monitoring detects any VOCs, then the Permittee shall immediately contact the Washington Regional Office supervisor, telephone number [phone], for further instructions regarding any
additional follow-up analyses required.
WQ0000185 Version 3.7 Attachment C Page 1 of 2

ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS Certification Date: November 8, 2023
Ocean Sands Water and Sewer District Permit Number: WQ0000185 Version: 3.7
6. If monitoring detects TOC concentrations greater than 10 mg/L in any downgradient monitoring well, the Permittee shall conduct additional sampling and analysis to identify the individual
constituents comprising this TOC concentration. If the TOC concentration as measured in the background monitor well exceeds 10 mg/L, this concentration shall represent the naturally occurring
TOC concentration. Any exceedances of this naturally occurring TOC concentration in the downgradient wells are subject to additional sampling and analysis as described above.
7. The Permittee shall report monitoring well data on Compliance Monitoring Forms (GW-59s) consistent with the nomenclature and location information provided in this attachment.
WQ0000185 Version 3.7 Attachment C Page 2 of 2

1-
Akr �!
's
a
-- — - — Sett lement Agr(
Legend
Monitoring Location
Compliance Boundary
Review Boundary
Property Lines
? Groundwater Lowering System
Spray Infiltration E ; oigac
I!.2 360 ®' a
�� ree