WQ0000185_Final Permit_20100514

u
NCQEN
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Eric Weatherly, County Engineer
County of Currituck
P.O. Box 38
Currituck, North Carolina 27929
Dear Mr. Weatherly:
Division of Water Quality
Coleen H. Sullins
Director
May 14, 2010
Dee Freeman
Secretary
Subject: Permit No. WQ0000185
Ocean Sands
High -Rate Infiltration System
Currituck County
In accordance with your permit minor modification request received March 18, 2010, we are
forwarding herewith Permit No. WQ0000185, dated May 14, 2010, to Currituck County for the
construction and continued operation of the subject wastewater treatment and high -rate infiltration
facilities.
This permit modification authorizes replacement of rotary distributors on high rate infiltration
fields 5, 6, 7, and 8 with fixed spray heads. No loading rate changes are necessary.
On August 5, 2009, Session Law 2009-406, entitled "An Act to Extend Certain Government
Approvals Affecting the Development of Real Property Within the State," was enacted by the General
Assembly and signed into law. The Act, known as the Permit Extension Act of 2009, extends the
expiration date of certain government approvals and permits. Permit WQ0000185 falls within the scope
of this Act and is therefore being extended until January 31, 2013. Per your permit, a renewal
application must still be submitted six months in advance of the extended expiration date.
This permit shall be effective from the date of issuance until January 31, 2013, shall void Permit
No. WQ0000185 issued March 11, 2009, 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.
AQUIFER PROTECTION SECTION
1636 Mail Service Center, Raleigh, North Carolina 27699-1636
Location: 2728 Capital Boulevard, Raleigh, North Carolina 27604
Phone: [phone] FAX 1: 919-715-0588; FAX 2: 919-715-60461 Customer Service: 1-877-623-6748
Internet: www.newaterouality.org
An Equal Opportunity '.Affirmative Action Employer
ne
NortbCarolina
Naturall,, f

Mr. Eric Weatherly
May 14, 2010
Page 2 of 2
Please pay special attention to the following changes:
➢ Condition I.1. requires the Permittee to submit a written evaluation of nitrate (NO,) levels in
the wastewater treatment plant effluent and groundwater monitoring wells within sixty (60)
days of issuance of this permit. The evaluation shall summarize NO-, monitoring data for the
past five (5) years and shall include recommendations and a proposed time schedule for
further action.
➢ Effluent monitoring for Total Phosphorous (TP) has been added to PPI 002 in Attachment A.
➢ Surface water monitoring requirements have been reduced from three sampling points to one
sampling point (SW -1 — Attachment A). Due to ongoing groundwater monitoring violations,
a requirement to monitor flow discharged from the groundwater lowering system has been
added to SW -1. 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. Total phosphorous monitoring has also been added to SW -1.
➢ Attachment C contains monitoring requirements for monitoring wells MW -1 through MW -9.
Due to ongoing groundwater monitoring violations, sampling frequencies have been
increased to once per month. Groundwater monitoring for total phosphorous has also been
included.
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.
One approved plan sheet revision is being forwarded to you. If you need additional information
concerning this matter, please contact Lori Montgomery at [phone] or
[e-mail].
Sincerely,
/Col;n;H. Sullins
cc: Currituck County Health Department
Washington Regional Office, Aquifer Protection Section
William P. McDowell, III, PE — McDowell & Associates, PA (P.O. Boa 391, Elizabeth City, NC 27907)
Permit File WQ0000185
Notebook File WQ0000185

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL. RESOURCES
VN"& 9141":1
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
construction and operation of four (4) fixed spray head systems to replace rotary distributors in high rate
infiltration zones 5, 6, 7, and 8;
continued operation of a 500,000 GPD wastewater treatment plant 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 chlorination
facility, [two (2) 3,125 gallon contact tanks and one (1) 4,167 gallon contact tank], a 3,200 gallon dosing
tank, 600,000 GPD capacity high rate infiltration system; [ten (10) 100 foot diameter fixed -spray head
zones], and one (1) 200 kW standby generator;
to serve Ocean Sands Development, with no discharge of wastes to surface waters, pursuant to the
application received March 18, 2010, 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, 2013, shall void Permit No.
WQ0000185 issued January 31, 2013 and shall be subject to the following specified conditions and
limitations:
WQ0000185 Version 2.2 Shell Version 100209 Pagel of 9

I. SCHEDULES
Within sixty (60) days of issuance of this permit, the Permittee shall submit an evaluation of tot4l
nitrate (NO,) levels in the wastewater treatment plant effluent and groundwater monitoring wells.
The evaluation shall summarize NO, monitoring data for the past five (5) years and shall include
recommendations and a proposed time schedule for further action. The evaluation shall be submitted
to the Aquifer Protection Section, 1636 Mail Service Center, Raleigh, NC 27699-1636.
2. In accordance with 15A NCAC 02T .0 116, upon completion of construction and prior to operation of
modified high rate infiltration Zones 5, 6, 7, and 8 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 approved 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 Quality,
Aquifer Protection Section, 1636 Mail Service Center, Raleigh, NC 27699-1636.
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 Aquifer Protection Section's regional
supervisor shall be made from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State
Holidays.
4. submit in a report to the Aquifer Protection Section, 1636 Mail Service Center, Raleigh, NC 27699-
1636. At this time, the Division will evaluate the need to modify the permit to include an effluent
nitrate limit based upon the observed effluent concentrations and corresponding groundwater
monitoring results.
5. 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.
H. 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 disposal facilities.
This permit shall not relieve the Permittee of their responsibility for damages to groundwater or
surface water resulting from the operation of this facility.
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.
4. Effluent limitations shall not exceed those specified in Attachment A.
5. Application rates, whether hydraulic, nutrient or other pollutant, shall not exceed those specified in
Attachment B.
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6. The compliance boundary for the disposal system shall be specified in accordance with 15A NCAC
02L .0107(b). 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.
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.
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.
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)•
10. The facilities permitted herein shall be constructed according to the following setbacks:
a. The setbacks for high -rate infiltration Zones 1-10, permitted prior to September 1, 2006 shall be
as follows (all distances in feet):
i. Any on -property residential units that are to be sold: 10
ii. Any private or public water supply source: 100
iii. Any streams classified as WS or B: 200
iv. Any "SA" or "SB" classified surface waters: 200
v. Any other stream, canal, marsh, or coastal waters: 200
vi. Any Class I or Class II impounded reservoir used as a source of drinking water: 200
vii. Any other lake or impoundment: 200
viii. Any drainage system (ditches, drains, surface water diversions, etc): 200
ix. Any groundwater lowering and surface drainage ditches 200
x. Any property line: 50
xi. Impounded public water supplies: 500
xii. Public shallow groundwater supply: 500
b. The setbacks for storage and treatment units permitted prior to September 1, 2006 shall be as
- follows (all distances in feet):
i. Public right of ways: 50
ii. Any property line: 50
III. OPERATION AND MAINTENANCE REQUIREMENTS
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 pursuant to 15A NCAC 02T .0707, which at a minimum shall include operational
functions, maintenance schedules, safety measures and a spill response plan.
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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.
3. The high rate infiltration fields shall be raked at least twice monthly during the months of April
through October and once a week during the months of November through March. The high rate
infiltration fields shall be further raked as needed to remove vegetation or solids, and to level the
fields.
4. The application of chemicals to the high rate infiltration fields is expressly prohibited.
5. Adequate measures shall be taken to prevent wastewater ponding in or runoff from the high rate
infiltration fields.
6. Adequate measures shall be taken to divert stormwater away from the high -rate infiltration fields.
7. Should the application of treated wastewater to the disposal system result in the breakout of
wastewater at any point less than 200 feet from the outer edges of the disposal system, the County of
Currituck must restructure the site or modify the system's operation to eliminate the discharge.
8. High rate infiltration shall not be performed when the ground is in a condition that will cause ponding
or runoff.
9. All waste application equipment must be tested and calibrated at least once per permit cycle. Records
of the calibration must be maintained for five years.
10. Only effluent from Ocean Sands WWTP shall be infiltrated on the sites listed in Attachment B.
11. 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 interrupting the primary power source.
12. No automobiles or machinery shall be allowed on the infiltration sites except during equipment
installation or while maintenance is being performed.
13. Public access to the infiltration sites and wastewater treatment facilities shall be prohibited.
14. The residuals (including screenings) 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.
15. Diversion or bypassing of untreated or partially treated wastewater from the treatment facilities is
prohibited.
16. The chlorine tablets used in the disinfection facility shall be of the type specified in the plans and
specifications approved by the Division.
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.
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2. Per 15A NCAC 02H .0800, a Division certified laboratory shall conduct all laboratory analyses for
the required effluent, groundwater or surface water parameters.
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.
4. The Permittee shall monitor the effluent from the subject facilities at the frequencies and locations for
the parameters specified in Attachment A. Surface water quality monitoring shall be conducted by
the Permittee at the frequencies and locations for the parameters specified in Attachment A.
5. 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. Field infiltrated;
© d. Length of time field is infiltrated;
e. Loading rates to each infiltration site listed in Attachment B;
f. Weather conditions.
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 Condition IV.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 Quality
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
7. Pursuant to § 143-215.1 C., the Permittee shall provide to its users and the Division of Water Quality
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 Quality
Aquifer Protection Section
1636 Mail Service Center
CRaleigh, North Carolina 27699-1636
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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.
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.).
10. Monitoring wells MW -4, MW -5, MW -6, MW -7, MW -8, and MW -9 shall be sampled 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 Figure 1.
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 Quality
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
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. Any occurrence at the facility resulting in the treatment of significant amounts of wastes that is
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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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.
V. INSPECTIONS
1. The Permittee shall provide adequate inspection and maintenance to ensure proper operation of the
wastewater treatment and disposal facilities.
2. The Permittee or their designee shall inspect the wastewater treatment and disposal 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.
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 disposal 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.
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.
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. .
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).
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 the Division's General Permit NCGO10000; 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.
5. 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.
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6. The Permittee shall retain a set of Division approved plans and specifications for the life of the
facilities permitted herein.
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 pursuant to 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.
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).
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 be cause for the Division to revoke this permit pursuant to 15A
NCAC 02T .0105(e)(3).
Permit issued this the 10' day of May, 2010
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
G&een ullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0000185
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C
c
Permit No. WQ0000185
County of Currituck
Qcean Sands
ENGINEERING CERTIFICATION
❑ Partial ❑ Final
High Rate Infiltration System
May 14, 2010
Currituck County
In accordance with 15A NCAC 02T .0 116, 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 QUALITY
AQUIFER PROTECTION SECTION
LAND APPLICATION UNIT
By U.S. Postal Service:
1636 MAIL SERVICE CENTER
By Courier/Special Delivery:
2728 CAPITAL BOULEVARD
RALEIGH, NORTH CAROLINA 27699-1636 RALEIGH, NORTH CAROLINA 27604
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n n n
ATTACHMENT A - LIMITATIONS AND MONITORING REQUIREMENTS
PPI 002 — WWTF Effluent
Permit Number: WQ0000185 Version: 12
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING
REQUIREMENTS
Parameter Description -PCS Code
Monthly
Average
Monthly Geometric
Mean
Daily Minimum
Daily Maximum
Measurement
Frequency
Sample
Type
Flow, in conduit or thru treatment plant - 50050
500,000
GPD
Continuous
Recorder
BOD, 5 -Day (20 Deg. C) - 00310 - Summer'
10
mg/I
15
mg/I
Weekly
Composite
BOD, 5 -Day (20 Deg. C) - 00310 - Winter'
10
mg/I
15
mg/I
2 X Month
Composite
Solids, Total Suspended - 00530 - Summer'
20
mg/I
30
mg/1
Weekly
Composite
Solids, Total Suspended - 00530 - Winter'
20
mg/l
30
mg/I
2 X Month
Composite
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Summer (geom.mean)
14
#/100 ml
43
#/100 ml
Weekly
Composite
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Winter (geom.mean)'
14
#/100 ml
43
#/100 ml
2 X Month
Composite
Nitrogen, Ammonia Total (as N) - 00610 - Summer'
4
mg/I
6
mg/l
Weekly
Composite
Nitrogen, Ammonia Total (as N) - 00610 - Winter'
4
mg/l
6
mg/I
2 X Month
Composite
Nitrogen, Nitrate Total (as N) - 00620 - Summer'
Weekly
Composite
Nitrogen, Nitrate Total (as N) - 00620 - Winter'
2 X Month
Composite
Phosphorus, Total (as P) - C0665 - Summer'
Weekly
Composite
Phosphors, Total (as P) - C0665 - Winter'
2 X Month
Composite
Chlorine, Total Residual - 50060
5 X Week
Grab
pl-I - 00400
5 X Week
Grab
Solids. Total Dissolved - 70295
6.0
S.U.
9.0
S.U.
3 X Year z
Composite
Chloride (as CI) - 00940
3 X Year Z
Composite
1. Summer sampling shall be conducted April through October. Winter sampling shall be conducted November through March.
2. 3 X Year sampling shall be conducted in February, July, and December.
WQ0000185 Version 2.1 Attachment A Page 1 of 2

ATTACHMENT A - LIMITATIONS AND MONITORING REQUIREMENTS
SW -1— Surface Water Monitoring Location (shown in Figure 1)
Permit Number: WQ0000185 Version: 2.2
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING
REQUIREMENTS
Parameter Description -PCS Code
Monthly
Average
Monthly Geometric
Mean
Daily Minimum
Daily Maximum
Measurement
Frequency
Sample
Type
Flow, in conduit or through treatment plant — 50050 2
Continuous
Recording
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Summer (geom.mean)
Weekly
Grab
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Winter (geom.mean)'
2 X Month
Grab
Nitrogen, Ammonia Total (as N) - 00610 - Summer'
Weekly
Grab
Nitrogen, Ammonia Total (as N) - 00610 - Winter'
2 X Month
Grab
Nitrogen, Nitrate Total (as N) - 00620 - Summer'
Weekly
Grab
Nitrogen, Nitrate Total (as N) - 00620 - Winter'
2 X Month
Grab
Phosphorus, Total (as P) - C0665 - Summer'
Weekly
Grab
Phosphorus, Total (as P) - C0665 - Winter'
2 X Month
Grab
Summer sampling shall be conducted April through October. Winter sampling shall be conducted November through March.
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.
WQ000010ersion 2.1 GAttachment A 2 of 2

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ATTACHMENT B -APPROVED LAND APPLICATION SITES AND LIMITATIONS Permit Number: WQ0000185
County of Currituck — Ocean Sands
Version: 2.2
INFILTRATION AREA INFORMATION
APPLICATION LIMITATIONS
Zone
Owner
County
Latitude
Longitude
Net
Acreage
Dominant
Soil Series
Parameter
Rate
Yearly
Mal
Units
I
Currituck County
Currituck
36°19'23"
7548'53"
0.18
01284 - Application Surface Irrigation
7.65
GPD/112
2
Currituck County
Currituck
36019'22"
75°48'53"
0.18
01284 - Application Surface Irrigation
7.65
GPD/ft2
3
Currituck County
Currituck
36°19'23"
75048'52"
0.18
01284 - Application Surface Irrigation
7.65
GPD/ft2
4
Currituck County
Currituck
36°19'22"
75°48'52"
0.18
01284 - Application Surface Irrigation
7.65
GPD/ft'
5
Currituck County
Currituck
36"19'24"
7548'51"
0.18
01284 - Application Surface Irrigation
7.65
GPD/ft
6
Currituck County
Currituck
36°19'23"
75°48'51"
0.18
01284 -Application Surface Irrigation
7.65
GPD/12
7
Currituck County
Currituck
36°19'24"
75°48'49"
0.18
01284 - Application Surface Irrigation
7.65
GPD/ft2
8
Currituck County
Currituck
36'19'23"
75°48'49"
0.18
01284 - Application Surface Irrigation
7.65
GPD/112
9
Currituck County
Currituck
36°19'24"
75°48'48"
0.18
01284 - Application Surface Irrigation
7.65
GPD/fl'
10
Currituck County
Currituck
36"19'23"
7548'48"
0.18
01284 - Application Surface Irrigation
7.65
GPD/ft2
Totals
1.80
WQ0000185 Version 2.2 Attachment B Page 1 of 2

THIS PAGE BLANK
WQ00000ersion 2.2 Q Attachment B Oage 2 of 2

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ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS
Monitoring wells: MW -4, MW -5, MW -6, MW -7, MW -8 and MW -9 7
0
Permit Number: WQ0000185 Version: 2.2
GROUNDWATER CHARACTERISTICS
GROUNDWATER -STANDARDS
MONITORING REQUIREMENTS
Parameter Description - Parameter Code
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
Water level, distance from measuring point - 82546
Monthly
Calculated
2,3
pli - 00400
6.0 s.u.
8.5 s.u.
Monthly
Grab
2
Coliform. Fecal MF, M -FC 13roth,44.5C - 31616
Monthly
Grab
Solids, Total Dissolved- 180 Deg.0 - 70300
500 mg/1
Monthly
Grab
Carbon, Tot Organic (TOC) - 00680
Monthly
Grab
6
Chloride (as CI) - 00940
250 mg/I
Monthly
Grab
Nitrogen, Ammonia Total (as N) - 00610
Monthly
Grab
Nitrogen, Nitrate Total (as N) - 00620
10 mg/I
Monthly
Grab
Phosphorus. Total (as P) -Concentration - C0665
Monthly
Grab
Volatile Compounds. (GC/MS) - 78732
Semi-annually
Grab
1,4.5
1. Semi-annual monitoring shall be conducted during the months of December and February.
2. The measurement of water levels shall 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 plI shall be made after purging and prior to sampling for the remaining parameters.
3. 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 all monitoring wells shall be surveyed relative to a common datum.
4. Volatile Organic Compounds (VOC) - In November only. analyze by one of the following methods:
a. Standard Method 6230D, PQL at 0.5 pg/L or less
b. Standard Method 621013, PQL at 0.5 pg/L or less
C. EPA Method 8021. Low Concentration. PQL at 0.5 pg/L or less
d. EPA Method 8260, Low Concentration, PQL at 0.5 pg/L or less
e. Another method with prior approval by the Aquifer Protection Section Chief
Any method used must meet the following qualifications:
a. A laboratory must he DWQ certified to run anv method used.
b. The method used must. at a minimum, include all the constituents listed in Table V 111 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 the DWQ Laboratory Certification Unit. Any constituents
detected above the MDL but below the PQL of 0.5 pg/L must be qualified (estimated) and reported.
5. If any volatile organic compounds (VOC) are detected as a result of monitoring as provided in Attachment C, then the Washington Regional Office Aquifer Protection Supervisor. telephone
number (252 946-6481, must be contacted immediately for further instructions regarding any additional follow-up analyses required.
6. If TOC concentrations greater than 10 mg/I 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 exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above.
WQ0000185 Version 2.2 Attachment C Pagel of 2

7. Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure I and this attachment.
WQ0000 aersion 2.2 4) Attachment C age 2 of 2

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PROPOSED MODIFICATIONS TO Br
EXISTING ROTARY DISTRIBUTORS SPRAYHEAD & PIPING LAYOUT
NUMBERS S. 6. 7 & 8 `
(SEE SPRAYHEAD DETAIL)_
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Legend / General Notes:
EXISTING ROTARY DISTRIBUTORS /
we NUMBERS 5, 6. 7 & 8 ` 16 4' EXIS11Nc ep CPD ROTARY DlsTteIBUTOR TO BE DWOUSHED.
(SEE SPRAYHEAD DETAIL) \� / �c 0 CCONCRt� AND TO (PIPING BACKRY TCTHE Je PRROPEUXRAO CIES.
(Note: See General Notes / EACH EXISTING ROTARY DIS7M&UTDR (#, E. 7 & B) SHALL BE
for Extent of work) / / CHANCED TO 12 INDIVIDUAL SPRINKLER HEADS WTH A FLOW
RATING OF 7.23 GPM AND A RADIUS OF 20'
_ - _ _ / / /I 7 \ 74E NEW SPRINKLER SUPPLY LINE RILL START AT THE METER
-_ V
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3' LXJE
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MINIMUM % PIPING WILL BE :.S' SCHEDULE 40 PVC OR
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•--�__� - _..__. - __ __... .- WOBBLER SPRAY HEAD PIP WILL BE INSTALLED ON A FEMALE
owl
---- ----------
SITE PLAN:
SCALE: I" = 50'
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06 'ME SPR"MM HEAD UP"OHT 5MLL BE INSTALLED IN CONCRETE
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(Note: See General Notes / EACH EXISTING ROTARY DIS7M&UTDR (#, E. 7 & B) SHALL BE
for Extent of work) / / CHANCED TO 12 INDIVIDUAL SPRINKLER HEADS WTH A FLOW
RATING OF 7.23 GPM AND A RADIUS OF 20'
_ - _ _ / / /I 7 \ 74E NEW SPRINKLER SUPPLY LINE RILL START AT THE METER
-_ V
._. ...� _�_. EFFLUENT ON THE EXISTING
3' LXJE
>>_ -. _•_ Jam•.. ...i.,r.. _ _. .- _ _ - - �
MINIMUM % PIPING WILL BE :.S' SCHEDULE 40 PVC OR
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•--�__� - _..__. - __ __... .- WOBBLER SPRAY HEAD PIP WILL BE INSTALLED ON A FEMALE
owl
---- ----------
SITE PLAN:
SCALE: I" = 50'
REDUCER COUPLING. (SEE DETAIL)
06 'ME SPR"MM HEAD UP"OHT 5MLL BE INSTALLED IN CONCRETE
FOR STABILISATION. (SEE DETAIL)
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