WQ0000185_Final Permit_20150529

Ajf%
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
May 29, 2015
Eric T. Weatherly -- County Engineer
County of Currituck
153 Courthouse Road, Suite 302
Currituck, NC 27929
Dear Mr. Weatherly:
Donald R. van der Vaart
Secretary
Subject: Permit No. WQ0000185
Ocean Sands WWTP
High -Rate Infiltration System
Currituck County
In accordance with your permit major modification request received December 18, 2014, and
subsequent additional information received March 30, 2015, we are forwarding herewith Permit No.
WQ0000185 dated May 29, 2015, to the County of Currituck for the construction and continued operation
of the subject wastewater treatment and high -rate infiltration facilities.
The modifications to the subject permit are as follows:
♦ ApprovaI for Phase -I construction and operation of a new 200,000 -GPD Amphidrome
wastewater treatment plant (to replace the existing plant).
This permit shall be effective from the date of issuance until January 31, 2019, shall void Permit
No. WQ0000185 issued January 31, 2014, and shall be subject to the conditions and limitations as
specified therein. Please pay particular 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 shall result in future compliance
problems.
For your convenience, customized electronic copies of your facility's NDMR and NDAR-2
reporting forms are available for download at: http://13ortal.ncdenr.org/web/wql4ps/lau/reporting.
If any parts, requirements or limitations contained in this permit are unacceptable, the Permittee
has the right to request an adjudicatory hearing upon written request within 30 days following receipt of
this permit. This request shall be in the form of a written petition, conforming to Chapter 150B of the
North Carolina General Statutes, and filed with the Office of Administrative Hearings at 6714 Mail
Service Center, Raleigh, NC 27699-6714. Unless such demands are made, this permit shall be final and
binding.
Non -Discharge Permitting Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: htt :1! rtal.nodenr.o /webfw
An Equal Opportunity 1AftirrnativeAction Employer— Matin in part with recycled paper

Mr. Weatherly
May 29, 2015
Page 2 of 2
One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this permit, please contact Chonticha McDaniel at [phone] or
chonticha.mcdaniel@ncdenr. gov.
Sincerely,
/SJ?Zimmerman, Director
Division of Water Resources
cc: Currituck County Health Department (Electronic Copy)
Washington Regional Office, Water Quality Regional Operations Section•(Electronic Copy)
Joseph J. Anlauf, PE — Anlauf Engineering, PLLC (Electronic Copy)
Beth Buffington, PWSS — Protection and Enforcement Branch (Electronic Copy)
Digital Permit Archive (Electronic Copy)
Central Files

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
HIGH -RATE INFILTRATION SYSTEM PERMIT
In accordance with 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
County of Currituck
Currituck County
FOR THE
continued operation of a 500,000 gallon per day (GPD) wastewater treatment and high -rate infiltration
facility consisting of:
a 180,000 gallon total capacity influent aerated surge tank with odor control [one (1) 50,000 gallon, three
(3) 35,000 gallon, and one (1) 25,000 gallon tank], a 500,000 GPD total capacity aerobic zone, [eight (8)
50,000 gallon aeration tanks and four (4) 25,000 gallon aeration tanks], a 500,000 GPD capacity clarifier
set, [eight (8) 8,335 gallon clarifiers and four (4) 4,168 gallon. clarifiers], 50,000 gallons of residuals
storage capacity, [ten (10) 5,000 gallon residuals holding tanks], 280 sq. ft. of tertiary filtration capacity,
[four (4) 42 sq. ft. filters and two (2) 56 sq. ft. filters], a 10,417 gallon liquid chlorination facility, [two (2)
3,125 gallon contact tanks and one (1) 4,167 gallon contact tank], a 3,200 gallon dosing tank, and one (1)
200 kW standby generator, a 2.41 acre, 600,000 GPD high rate infiltration disposal area including
forcemains, manifolds, risers, 118 Seaninger Super spray heads and two submersible 15 HP dosing
pumps, groundwater lowering system with groundwater pump station;
Phase -I replacement of the existing wastewater treatment plant and construction and operation of a new
200,000 -GPD Amphidrome wastewater treatment plant consisting of a new headworks structure, a
600,000 -GPD flow equalization basin (1/3 of the flow volume will be directed to this new plant while the
remaining 2/3 will be directed to the existing treatment infrastructure), a 3.8 -MGD channel grinder, a 5.5 -
MGD fine screen, a manual bar screen, three 50,000 -gallon FEQ chambers, a 47,285 -gallon primary
clarifier, a 27,000 -gallon main reactor dosing tank, four 13,990 -gallon main SAGB reactors, a 7,000 -
gallon secondary SAGB reactor, two clearwell units (20,000 and 11,882 gallons), a 55 -gallon chlorination
tank, an electric pulse pump, two sludge holding tanks (36,550 and 39,859 gallons), flow measuring
devices, an auxiliary generator, and associated pumps, valves, piping, and appurtenances;
to serve Ocean Sands WWTP, with no discharge of wastes to surface waters, pursuant to the application
received December 18, 2014, and subsequent additional information received by the Division of Water
Resources, and in conformity with the project plans, specifications, and other supporting data
subsequently filed and approved by the Department of Environment and Natural Resources and
considered a part of this permit.
This permit shall be effective from the date of issuance until January 31, 2019, shall void Permit No.
WQ0000185 issued January 31, 2014, and shall be subject to the following specified conditions and
limitations:
WQ0000185 Version 3.2 Shell Version 150213 Page 1 of 9

I. SCHEDULES
Upon completion of construction and prior to operation of the new/upgraded treatment facility, a
certification (attached) shall be submitted from a licensed North Carolina Professional Engineer
certifying that the permitted facility has been installed in accordance with this permit, Division
approved plans and specifications, and other supporting documentation, including the location of all
monitoring wells as applicable. If this project is to be completed in phases and partially certified the
Permittee shall retain the responsibility to track further construction a roved under the same permit,
and shall provide a final certificate of completion once the entire project has been completed. Mail
the Certification to the Division of Water Resources, Water Quality Permitting Section, 1617 Mall
Service Center, Raleigh, NC 27699-1617. [15A NCAC 02T .0116(a)]
2. The Washington Regional Office, telephone number [phone], shall be notified at least 48
hours in advance (excluding weekends and holidays) of operation of the installed facilities such that
an in-place inspection can be made. Notification to the regional supervisor shall be made from 8:00
a.m, until 5.00 p.m. on Monday through Friday, excluding State Holidays. [15A NCAC 02T
.0108(b)(2)]
3. No later than six months prior to the expiration of this permit, the Permittee shall request renewal of
this permit on official Division forms. Upon receipt of the request, the Division will review the
adequacy of the facilities described therein, and if warranted, will renew the permit for such period of
time and under such conditions and limitations as it may deem appropriate. Please note Rule 15A
NCAC 02T .0105(d) requires an updated site map to be submitted with the permit renewal
application. [15ANCAC 02T .0105(d), 02T .0106, 02T .0109, 02T .0115(c)]
II. PERFORMANCE STANDARDS
The subject non -discharge facilities shall be effectively maintained and operated at all times so there
is no discharge to surface waters, nor any contravention of groundwater or surface water standards.
In the event the facilities fail to perform satisfactorily, including the creation of nuisance conditions
due to improper operation and maintenance, or failure of the infiltration areas to adequately 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 infiltration facilities.
[G.S. 143-215.1, 143-213.3(x)]
2. This permit shall not relieve the Permittee of their responsibility for damages to groundwater or
surface water resulting from the operation of this facility. [15A NCAC 02B .0200, 02L .0100]
3. All wells constructed for purposes of groundwater monitoring shall be constructed in accordance with
15A NCAC 02C .0108 (Standards of Construction for Wells Other than Water Supply), and any other
jurisdictional laws and regulations pertaining to well construction. [15A NCAC 02C .0108]
4. Effluent quality shall not exceed the limitations specified in Attachment A. [15A NCAC 02T
.0108(b)(1), 02T .0705(b)]
5. Application rates, whether hydraulic, nutrient or other pollutant, shall not exceed those specified in
Attachment B. [15A NCAC 02T .0705(m)]
6. This disposal system was individually permitted on or after December 30, 1983; therefore, the
compliance boundary is established at either 250 feet from the effluent disposal area, or 50 feet within
the property boundary, whichever is closest to the effluent disposal area. An exceedance of
groundwater standards at or beyond the compliance boundary is subject to remediation action
according to 15A NCAC 02L .0106(d)(2) as well as enforcement actions in accordance with North
Carolina General Statute 143-215.6A through 143-215.6C. [15A NCAC 02L .0106(d)(2), 02L
.0107(b)]
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7. In accordance with 15A NCAC 02L .0108, the review boundary is established midway between the
compliance boundary and the effluent disposal area. Any exceedance of groundwater standards at the
review boundary shall require action in accordance with 15A NCAC 02L .0106. [ 15A NCAC 02L
.0106, 02L.01081
8. The Permittee shall apply for a permit modification to establish a new compliance boundary prior to
any sale or transfer of property affecting a compliance boundary. [ I SA NCAC 02L .0107(c)]
9. In accordance with 15A NCAC 02L .0107(d), no wells, excluding Division approved monitoring
wells, shall be constructed within the compliance boundary except as provided for in 15A NCAC 02L
.0107(g). [15A NCAC 02L .0107]
10. Except as provided for in 15A NCAC 02L .0107(g), the Permittee shall ensure any landowner who is
not the Permittee and owns land within the compliance boundary shall execute and file with the
Currituck County Register of Deeds an easement running with the land containing the following
items:
a. A notice of the permit and number or other description as allowed in 15A NCAC 02L .0107(f)(1);
b. Prohibits construction and operation of water supply wells within the compliance boundary; and
c. Reserves the right of the Permittee or the State to enter the property within the compliance
boundary for purposes related to the permit.
The Director may terminate the easement when its purpose has been fulfilled or is no longer needed.
[15A NCAC 02L .0107(f)]
11. The facilities permitted herein shall be constructed according to the following setbacks:
a. The setbacks for high -rate infiltration sites shall be as follows (all distances in feet):
i. Any on -property residential units:
10
ii. Any private or public water supply source:
100
iii. Surface waters:
200
iv. Groundwater lowering ditches:
200
v. Surface water diversions:
50
vi. Any well with exception of monitoring wells:
100
vii. Any property line:
50
viii. Impounded public water supplies:
500
ix. Public shallow groundwater supply:
500
b. The setbacks for storage and treatment units shall be as follows (all distances in feet).-
i.
eet):
i. Public right of way: 50
ii. Any property line: 50
[15A NCAC 02H.02190)]
III. OPERATION AND MAINTENANCE RE UIREMENTS
1. The facilities shall be properly maintained and operated at all times. The facilities shall be effectively
maintained and operated as a non -discharge system to prevent the discharge of any wastewater
resulting from the operation of this facility. The Permittee shall maintain an Operation and
Maintenance Plan, which at a minimum shall include operational functions, maintenance schedules,
safety measures and a spill response plan. [15A NCAC 02T .0707]
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2. Upon the Water Pollution Control System Operators Certification Commission's (WPCSOCC)
classification of the subject non -discharge facilities, in accordance with 15A NCAC 08G .0200 the
Permittee shall designate and employ a certified operator in responsible charge (ORC) and one or
more certified operator(s) as back-up ORC(s). The ORC or their back-up shall visit the facilities in
accordance with 15A NCAC 08G .0200, and shall comply with all other conditions specified in the
previously cited rules. [ 15A NCAC 02T .0117]
3. Only effluent from Ocean Sands WWTP shall be infiltrated on the sites listed in Attachment B. [G.S.
143-215.1]
4. An automatically activated standby -power source capable of powering all essential treatment units
shall be on site and operational at all times. If a generator is employed as an alternate power supply,
it shall be tested weekly by inten-upting the primary power source. [15A NCAC 02H .0404(g)(3)]
5. No automobiles or machinery shall be allowed on the infiltration sites except during equipment
installation or while maintenance is being performed. [15A NCAC 02T .0108(b)(1)]
6. Public access to the infiltration sites and wastewater treatment facilities shall be prohibited. [15A
NCAC 02T .0705(p)]
7. The residuals generated from the wastewater treatment facilities shall be disposed or utilized in
accordance with 15A NCAC 02T .1100. The Permittee shall maintain a residual management plan
pursuant to 15A NCAC 02T,0708. [15A NCAC 02T .0708, 02T .1100]
8. Diversion or bypassing of untreated or partially treated wastewater from the treatment facilities is
prohibited. [15A NCAC 02T.0705(i)]
9. A protective vegetative cover shall be established and maintained on all earthen embankments (i.e.,
outside toe of embankment to maximum allowable temporary storage elevation on the inside of the
embankment), berms, pipe runs, erosion control areas, and surface water diversions. Trees, shrubs,
and other woody vegetation shall not be allowed to grow on the earthen dikes or embankments.
Earthen embankment areas shall be kept mowed or otherwise controlled and accessible. [15A NCAC
02T .0108(b)(1)]
10. The infiltration basin(s) shall be periodically dredged to remove deposited materials that may impede
the infiltration process. Cleaning records shall be maintained at the facility for a period of no less
than five years, and shall be made available to the Division upon request. The Washington Regional
Office, telephone number [phone], shall be notified prior to each cleaning. [ 15A NCAC 02T
.0108(b)(1)]
IV. MONITORING AND REPORTING REQUIREMENTS
1. Any Division required monitoring (including groundwater, plant tissue, soil and surface water
analyses) necessary to ensure groundwater and surface water protection shall be established, and an
acceptable sampling reporting schedule shall be followed. [15A NCAC 02T .0108(c)]
2. A Division certified laboratory shall conduct all laboratory analyses for the required effluent,
groundwater or surface water parameters. [15A NCAC 02H .0800]
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3. Flow through the treatment facility shall be continuously monitored, and daily flow values shall be
reported on Form NDMR.
The Permittee shall install and maintain an appropriate flow measurement device to ensure the
accuracy and reliability of flow measurement consistent with accepted engineering and scientific
practices. Selected flow measurement devices shall be capable of measuring flows with a maximum
deviation of less than ten percent from true flow; accurately calibrated at a minimum of once per year;
and maintained to ensure the accuracy of measurements is consistent with the selected device's
accepted capability_ The Permittee shall maintain records of flow measurement device calibration on
file for a period of at least five years. At a minimum, documentation shall include:
a. Date of flow measurement device calibration,
b. Name of person performing calibration, and
c. Percent from true flow.
[15A NCAC 02T .0105(k)]
4. The Permittee shall monitor the effluent from the subject facilities at the frequencies and locations for
the parameters specified in Attachment A. [15A NCAC 02T .0108(c)]
The Permittee shall maintain adequate records tracking the amount of effluent infiltrated. At a
minimum, these records shall include the following information for each infiltration site listed in
Attachment B-
a. Date of infiltration;
b. Volume of effluent infiltrated;
c. Loading rates to each infiltration site listed in Attachment B; and
d. Weather conditions.
[15A NCAC 02T.0108(c)]
6. Three copies of all monitoring data (as specified in Conditions IV.3. and IVA.) on Form NDMR for
each PPI and three copies of all operation and disposal records (as specified in Conditions N.5) on
Form NDAR-2 for every site in Attachment B shall be submitted on or before the last day of the
following month. If no activities occurred during the monitoring month, monitoring reports are still
required documenting the absence of the activity. All information shall be submitted to the following
address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T.0105(1)1
7. Pursuant to § 143-215.1C., the Permittee shall provide to its users and the Division of Water
Resources 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. This report shall be prepared on either
a calendar or fiscal year basis and shall be provided no later than 60 days after the end of the calendar
or fiscal year. Two copies of the annual report provided to the Permittee's users shall be submitted
to:
Division of Water Resources
Water Quality Permitting Section
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[G.S. 143-215.1C]
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A record shall be maintained of all residuals removed from this facility. This record shall be
maintained at the facility for a period of no less than five years, and shall be made available to the
Division upon request. At a minimum, this record 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. Date the residuals were hauled; and
d. Volume of residuals removed.
[15ANCAC 02T .0108(b)(I)]
9. A maintenance log shall be maintained at this facility. This log shall be maintained at the facility for
a period of no less than five years, and shall be made available to the Division upon request. At a
minimum, this log shall include:
a. Date and results of power interruption testing on alternate power supply;
b. Date of calibration of flow measurement device;
c. Visual observations of the plant and plant site; and
d. Record of preventative maintenance (e.g., changing of equipment, adjustments, testing,
inspections and cleanings, etc.).
[15A NCAC 02T.01 08(b)(1)]
10. Monitoring wells shall be sampled after construction and within 3 months prior to initiating non -
discharge disposal operations. Monitoring wells shall be sampled thereafter at the frequencies and for
the parameters specified in Attachment C. All mapping, well construction forms, well abandonment
forms and monitoring; data shall refer to the permit number and the well nomenclature as provided in
Attachment C and Fi ug re 1. [15A NCAC 02T .0105(m)]
11. Two copies of the monitoring well sampling and analysis results shall be submitted on a Compliance
Monitoring Form (GW -59), along with attached copies of laboratory analyses, on or before the last
working day of the month following the sampling month. The Compliance Monitoring Form (GW -
59) shall include this permit number, the appropriate well identification number, and one GW -59a
certification form shall be submitted with each set of sampling results. All information shall be
submitted to the following address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T .0105(m)]
12. Noncompliance Notification:
The Permittee shall report by telephone to the Washington Regional Office, telephone number (252)
946-6481, as soon as possible, but in no case more than 24 hours, or on the next working day
following the occurrence or first knowledge of the occurrence of any 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, etc.), due to known or unknown reasons,
rendering the facility incapable of adequate wastewater treatment.
c. Any facility failure resulting in a by-pass directly to receiving 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.
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£ Effluent breakout from the infiltration basin(s).
Any emergency requiring immediate reporting (e.g., discharges to surface waters, imminent failure of
a storage structure, etc.) outside normal business hours shall be reported to the Division's Emergency
Response personnel at telephone number [phone], [phone], or [phone].
Persons reporting such occurrences by telephone shall also file a written report in letter form within
five days following first knowledge of the occurrence. This report shall outline the actions taken or
proposed to be taken to ensure the problem does not recur. [ 15A NCAC 02T .0105(1), 02T
.0108(b)(1)]
V. INSPECTIONS
1. The Permittee shall provide adequate inspection and maintenance to ensure proper operation of the
wastewater treatment and infiltration facilities. [15A NCAC 02T .0108(b)]
2. The Permittee or their designee shall inspect the wastewater treatment and infiltration facilities to
prevent malfunctions, facility deterioration and operator errors resulting in discharges, which may
cause the release of wastes to the environment, a threat to human health or a public nuisance. The
Permittee shall maintain an inspection log that includes, at a minimum, the date and time of
inspection, observations made, and any maintenance, repairs, or corrective actions taken. The
Permittee shall maintain this inspection log for a period of five years from the date of the inspection,
and this log shall be made available to the Division upon request. [15A NCAC 02T .0108(b)]
3. Any duly authorized Division representative may, upon presentation of credentials, enter and inspect
any property, premises or place on or related to the wastewater treatment and infiltration facilities
permitted herein at any reasonable time for the purpose of determining compliance with this permit;
may inspect or copy any records required to be maintained under the terms and conditions of this
permit, and may collect groundwater, surface water or leachate samples. [G.S. 143-21.5.3(a)(2)]
VI. GENERAL CONDITIONS
1. Failure to comply with the conditions and limitations contained herein may subject the Permittee to
an enforcement action by the Division in accordance with North Carolina General Statutes 143-
215.6A to 143-215.6C. [G.S. 143-215.6A to 143-215.6C]
2. This permit shall become voidable if the permitted facilities are not constructed in accordance with
the conditions of this permit, the Division approved plans and specifications, and other supporting
documentation. [15A NCAC 02T .0110]
3. This permit is effective only with respect to the nature and volume of wastes described in the permit
application, Division approved plans and specifications, and other supporting documentation. No
variances to applicable rules governing the construction or operation of the permitted facilities are
granted, unless specifically requested and approved in this permit pursuant to 15A NCAC 02T
.0105(n). [G.S. 143-21.5.1]
4. The issuance of this permit does not exempt the Permittee from complying with any and all statutes,
rules, regulations, or ordinances, which may be imposed by other jurisdictional government agencies
(e.g., local, state, and federal). Of particular concern to the Division are applicable river buffer rules
in 15A NCAC 02B .0200; erosion and sedimentation control requirements in 15A NCAC Chapter 4
and under General Permit NCG010000; any requirements pertaining to wetlands under 15A NCAC
02B .0200 and 02H.0500; and documentation of compliance with Article 21 Part 6 of Chapter 143 of
the General Statutes. [15ANCAC 02T .0105(c)(6)]
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In the event the permitted facilities change ownership or the Permittee changes their name, a formal
permit modification request shall be submitted to the Division. This request shall be made on official
Division forms, and shall include appropriate property ownership documentation and other supporting
documentation as necessary. The Permittee of record shall remain fully responsible for maintaining
and operating the facilities permitted herein until a permit is issued to the new owner. [15A NCAC
02T .0104]
6. The Permittee shall retain a set of Division approved plans and specifications for the life of the
facilities permitted herein. [15A NCAC 02T .0108(b)(1)]
7. The Permittee shall maintain this permit until all permitted facilities herein are properly closed or
permitted under another permit issued by the appropriate permitting authority. [15A NCAC 02T
.01050)]
8. This permit is subject to revocation or unilateral modification upon 60 days notice from the Division
Director, in whole or part for the requirements listed in 15A NCAC 02T ,0110. [15A NCAC 02T
.0110]
9. Unless the Division Director grants a variance, expansion of the permitted facilities contained herein
shall not be granted if the Permittee exemplifies any of the criteria in 15A NCAC 02T .0120(b). [15A
NCAC 02T.0120]
10. The Permittee shall pay the annual fee within 30 days after being billed by the Division. Failure to
pay the annual fee accordingly shall because for the Division to revoke this permit. [15A NCAC 02T
.0105(e)(3)]
Permit issued this the 29"I day of May 2015
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Sj•r Jay zmmerman, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Permit Number WQ0000185
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Permit No. WQOOOO18 5
County of Currituck
Ocean Sands WWTP
ENGINEERING CERTIFICATION
❑ Partial ❑ Final
High -Rate Infiltration System
May 29, 2015
Currituck County
In accordance with 15A NCAC 02T.01 16, I,
as a duly registered Professional Engineer in the State of North Carolina, having the Permittee's
authorization to ❑ periodically ❑ weekly ❑ fully observe the construction of the permitted facility,
hereby state to the best of my abilities that due care and diligence was used in the observation of the
construction, such that the facility was built within substantial compliance and intent of this permit, the
Division -approved plans and specifications, and other supporting documentation.
❑ Any variation to this permit, the Division -approved plans and specifications, and other supporting
documentation has been documented in the attached as -built drawings, and shall serve as the
Permittee's minor modification request to amend the permit accordingly.
Provide a brief narrative description of any variations:
Professional Engineer's Name
Engineering Firm
Mailing Address
City State Zip
Telephone E-mail NC PE Seal, Signature & Date
THE COMPLETED ENGINEERING CERTIFICATION, INCLUDING ALL SUPPORTING
INFORMATION AND MATERIALS, SHALL BE SENT TO THE FOLLOWING ADDRESS:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
WATER QUALITY PERMITTING SECTION
NON -DISCHARGE PERMITTING UNIT
By U.S. Postal Service:
1617 MAIL SERVICE CENTER
By Courier/Special Delivery:
512 N. SALISBURY ST.
RALEIGH, NORTH CAROLINA 27699-1617 RALEIGH, NORTH CAROLINA 27604
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ATTACHMENT A — LIMITATIONS AND MONITORING REQUIREMENTS
PPI 002 — WWTP Effluent
Permit Number: WQ0000185 Version: 3.2
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PCS
Code
Parameter Description
Units of
Measure
Monthly
Average
Monthly
Geometric Mean
Daly Minimum
Daily Maximum
Measurement
Frequency
Sample
Type
00310
BOD, 5 -Day (20'C) — Summer
mg/L
10
15
Weekly
Composite
00310
BOD, 5 -Day (20 °C) — Winter
mg/L
l0
15
2 x Month
Composite
00940
Chloride (as Cl)
mg/L
3
3 x Year
Composite
50060
Chlorine, Total Residual
mg/L
i
�I
S x Week
Grab
31616
Coliform, Fecal MF, M -FC Broth, 44.5 °C—
Slimmer
##1100 mL
14
43
Weekly
Grab
31616
Coiifonn, Fecal MF, M -FC Broth, 44.5 °C —
Winter
#/100 mL
14
43
2 x Month
Grab
50050
Flow, in Conduit or thru Treatment Plant
GPD
500,000
Continuous
Recorder
00610
Nitrogen, Ammonia Total (as N) — Summer
rug/L
4
6
Weekly
Composite
00610
Nitrogen, Ammonia Total (as N) — Winter
mg/L
4
6
2 x Month
Composite
00620
Nitrogen, Nitrate Total (as N) — Summer
mg/L
j
I 6
I
20
20
Weekly
Composite
00620
Nitrogen, Nitrate Total (as N) — Winter
mg/L
2 x Month
Composite
C0665
Phosphorus, Total (as P) — Summer
Fing/L
Weekly
Composite
C0665
Phosphorus, Total (as P) — Winter
mg/L
2 x Month
Composite
00400
pH
su
9
5 x Week
Grab
70300
Solids, Total Dissolved --- 180 °C
mg/L
30
3 x Year
Composite
00530
Solids, Total Suspended --- Summer
m
Weekly
Composite
00530
Solids, Total Suspended — Winter
mg/L
30
2 x Month
Camposite
I. Weekly (summer) sampling shall be conducted April through October; 2 x Month (winter) sampling shall be conducted November through March; 3 x Year sampling shall be conducted in
February, July, and December.
WQ0000185 Version 3.2 Attachment A Page 1 of 2

ATTACHMENT A — LIMITATIONS AND MONITORING REQUIREMENTS
SW -1— Surface Water Monitoring
Permit Number: WQ0000185 Version: 3.2
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PCS
Parameter Description
Units of
Monthly
Monthly Geometric
Daily Minimum
Daily Maximum
Measurement
Sample
Code
Measure
Average
Mean
Frequency
Type
50050
Flow, in conduit or through treatment
plant
GPD
Continuous
Recorder
00310
Coliform, Fecal MF, M -FC Broth,44.5C
#1100 mL
Monthly
Grab
00610
Nitrogen, Ammonia Total (as N)
ung/L
Monthly
Grab
00620
Nitrogen, Nitrate Total (as N)
mg/L
j
Monthly
Grab
00665
Phosphorus, Total (as P)
mg/L
Monthly
Grab
Flow pumped from the groundwater lowering system shall be monitored via the existing variable area velocity flow meter located inside the discharge pipe at the groundwater pump station.
WQ0000185 Version 3.2 Attachment A page 2 oft

ATTACHMENT B - APPROVED LAND APPLICATION SITES AND LIMITATIONS
County of Currituck — Ocean Sands WWTP
Permit Number: WQ0000185 Version: 3.2
INFILTRATION AREA INFORMATION
APPLICATION LIMITATIONS
Zone
Owner County
Latitude
Longitude
Net
Acreage
Dominant
Soil Series
Parameter
Dourly
Rate
Yearly
Max
Units
I
Currituck County Currituck
36019'23"
75°48'53"
2.41
Newhan-Corolla
Complex
01284 - Application Surface Irrigation
7.65
GPD1W
Totals
2AI
WQ0000185 Version. 3.2 Attachment B Page 1 of 1

THIS PAGE BLANK

ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS
Monitoring wells: MW -4, MW -5, MW -6, MW -7, and MW -9
Permit Number: WQ0000185 Version: 3.2
GROUNDWATER CHARACTERISTICS
GROUNDWATER STANDARDS
MONITORING REQUIREMENTS
PCS Code
Parameter Description
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
00680
Carbon, -Tot Organic (TOC)
mg/L
Monthly
Grab
5
00940
Chloride (as Cl)
250
mg/L
Monthly
Grab
31616
Coliform, Fecal MF, M -FC Broth, 44.5 °C
#/100 mL
Monthly
Grab
00610
Nitrogen, Ammonia Total (as N)
1.5
mg/L
Monthly
Grab
00620
Nitrogen, Nitrate Total (as N)
10
mg/L
Monthly
Grab
00400
pH
6.5-8.5
su
Monthly
Grab
1
00665
Phosphorus, Total (as P)
mg/L
Monthly
Grab
70300
Solids, Total Dissolved - 180 °C
500
mg/L
Monthly
Grab
GWVOC
Volatile Compounds (GC/MS)
Present: Yes/No
Semi-annually
Grab
3,4
82546
Water Level, Distance from measuring point
feet
Monthly
Calculated
1,2
1. The measurement of water levels sball be made prior to purging the wells. The depth to water in each well shall be measured from the surveyed point on the top of the casing. The measurement
of pH shal l be made after purging and prior to sampling for the remaining parameters.
2. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. The measuring points (top
of casing) of al I monitoring wel Is shall be surveyed relative to a common datum.
Volatile Organic Compounds (VOC) - In November only, analyze by one of the following methods:
a. Standard Method 6230D. PQL at 0.5 pg/I, or less
b. Standard Method 621 OD, PQL at 0.5 µglI, or less
c. EPA Method 8021. Low Concentration, PQI. at 0.5 µg/L or less
d. EPA Method 8260, Low Concentration. PQL at 0.5 pg/t, or less
C. Another method with prior approval by the Water Quality Permitting Section Chief
Any method used must meet the following qualifications:
a. A laboratory must be DWR certified to run any method used.
b. The method used must, at a minimum, include all the constituents listed in Table VIII of Standard Method 6230D.
c. The method used must provide a PQL of 0.5 pg/L or less that must be supported by laboratory proficiency studies as required by DW R. Any constituents detected above the MDL but below
the PQL of 0.5 pg/L must be qualified (estimated) and reported.
4. If any volatile organic compounds (VOC) are detected as a result of monitoring as provided in Attachment C, then the Washington Regional Office supervisor, telephone number [phone],
must be contacted immediately for further instructions regarding any additional follow-up analyses required.
5. If TOC concentrations greater than 10 mg/L are detected in any downgradient monitoring well, additional sampling and analysis must be conducted 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 will be taken to represent the naturally occurring
TOC concentration. Any execedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above.
6. Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure I and this attachment.
WQ0000185 Version 3.2 Attachment C Page I of 1

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