WQ0000185_Correction_20090401

^ 1
CEN
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
April 1, 2009
Eric Weatherly, County Engineer
County of Currituck
P.O. Box 38
Currituck, North Carolina 27929
Subject: Permit Correction No. WQ0000185
Ocean Sands
High -Rate Infiltration
Currituck County
Dear Mr. Weatherly:
In accordance with a request from the DWQ Washington Regional Office, we are forwarding
herewith corrected Permit No. WQ0000185, issued on March 11, 2009. The following corrections have
been made to the permit:
The facility description has been revised to reflect the correct number of aeration tanks.
The facility description has been revised to reflect only one standby generator.
Attachment C has been revised to clarify that monitoring well sampling frequency shall be
4 X Year (February, July, September, and December). VOC sampling shall occur semi-
annually (February and December).
Please replace the previous permit you received dated March 11, 2009 with this corrected permit
version. If you need additional information concerning this matter, please contact Lori Montgomery at
[phone] or [e-mail].
Sincerely,
Coleen H. Sullins
cc: Currituck County Health Department
Washington Regional Office, Aquifer Protection Section
APS Central Files
LAU Files
AQUIFER PROTECTION SECTION
1636 Mail Service Cente;. Raleigh, North Carolina 27699-1636
Location. 2728 Capital Boulevard, Raleiah, North Carolina 27604 O[te
Phone: [phone]'1 1 FAX 1: 919-715-0588; FAX 2: 919.715-60481 Customer Service: 1-877-623-6748 Noft lC..e11-0hn
Internet: wwwmwaterquality.orq
•ail call
An Equal Opportunity t Affirmative Action Employe:

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES 0
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
construction of three (3) fixed spray head systems to replace rotary distributors in high rate infiltration
zones 1, 3, and 4;
continued operation of a 500,000 GPD wastewater treatment plant and high rate infiltration facilities
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) 8335 gallon clarifiers and four (4) 4168 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) 3125 gallon contact tanks and one (1) 4167 gallon contact tank], a 3,200 gallon dosing
tank, 600,000 GPD capacity high rate infiltration system, [ten (10) 100 foot diameter zones], and one (1)
200 kW of standby generators;
to serve Ocean Sands Development, with no discharge of wastes to the surface waters, pursuant to the
application received November 18, 2008, and subsequent additional information received by the Division
of Water Quality (Division), and in conformity with the project plan, 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, 2010, shall void Permit
No. WQ0000185 issued February 16, 2005, and shall be subject to the following specified conditions and
limitations:
WQ0000185 Version 2.1 Shell Version 090204 Page 1 of 9

I. SCIIEDUEES
1. Upon completion of construction and prior to operation of modified infiltration Zones 1, 3, and 4 a
certification (see attached form) must be received from a professional engineer certifying that the
permitted facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting materials including the location of all monitoring wells as
applicable. If this project is to be completed in phases and partially certified, you 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
Aquifer Protection Section, Division of Water Quality, 1636 Mail Service Center, Raleigh, NC
27699-1636.
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 modified infiltration Zones 1,
3, and 4 so that an in-place inspection can be made. Such notification to the Aquifer Protection
Section regional supervisor shall be made during the normal office hours from 8:00 a.m. until 5:00
p.m. on Monday through Friday, excluding State Holidays.
3. Within 60 days of permit issuance, monitor well(s) MW -1, MW -2, MW -3, P-1, P-2, and P-3 shall be
temporarily abandoned by securing the wellheads to prevent access by hand. Each well shall have a
lockable cap and be locked in order to reasonably ensure against unauthorized access and use [15A
NCAC 02C .0108(c)(7)]. The well(s) shall be further secured by placing a compatible watertight cap
or seal onto the riser pipe to prevent potential contamination from entering the well(s).
4. 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 that Rule
15A NCAC 02T .0105(d) requires an updated site map to be submitted with the permit renewal
'Aare application.
C
U. PERFORMANCE STANDARDS
The high -rate infiltration facilities shall be effectively maintained and operated at all times so that
there is no discharge to the surface waters, nor any contravention of groundwater or surface water
standards. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions due to improper operation and maintenance, or failure of the high -rate infiltration
area to adequately assimilate the wastewater, the Permittee shall take immediate corrective actions
including those actions that may be required by the Division, such as the construction of additional or
replacement wastewater treatment and disposal facilities.
2. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to ground
or surface waters resulting from the operation of this facility.
All wells that are 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 state and local laws and regulations pertaining to well construction.
4. Effluent limitations shall not exceed those specified in Attachment A.
Application rate(s), whether hydraulic, nutrient, or other pollutant shall not exceed those specified in
Attachment B.
WQ0000185 Version 2.1 Shell Version 090204 Page 2 of u

6. The compliance boundary for the disposal system is specified by rules in 15A NCAC 02L,
Groundwater Classifications and Standards. This disposal system was individually permitted on or
after December 30, 1983; therefore, the compliance boundary is established at either 250 feet from
the waste disposal area, or 50 feet within the property boundary, whichever is closest to the waste
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.
The Permittee shall apply for a permit modification prior to any sale or transfer of property that
affects a compliance boundary to establish a new compliance boundary.
In accordance with 15A NCAC 02L .0107(d), no wells, other than monitoring wells, shall be
constructed within the compliance boundary except as provided by 15A NCAC 02L .0107(g).
9. The review boundary is established around the disposal systems midway between the compliance
boundary and the perimeter of the waste disposal area. Any exceedance of standards at the review
boundary shall require action in accordance with 15A NCAC 02L .0106.
10. The facilities permitted herein must 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 that are to be sold:
10
ii.
Any private or public water supply source:
100
ill.
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 H impounded reservoir used as a source of
200
drinking water:
vii.
Any other lake or impoundment:
200
viii.Any drainage system (ditches, drains, surface water diversions, etc.) and
200
from any groundwater lowering and surface drainage ditches:
ix.
Any property line:
50
x.
Impounded public water supplies:
500
xi.
Public shallow groundwater supply:
500
b. The setbacks for treatment and storage units shall be as follows (all distances in feet):
i. Any property line: 50
ii. Public right of ways: 50
11. A usable green area shall be maintained for wastewater disposal. The green area shall have the
capability of accommodating the average daily flow of the facility being served without exceeding the
loading rates of the green area. A "green area", as defined in 15A NCAC 02H .0404 (g)(7), is an area
suitable for waste disposal, either in its natural state or which has been modified by planting a
vegetative cover of grasses or low growing shrubbery.
III. OPERATION AND MAINTENANCE REQUIREMENTS
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 including operational functions, maintenance
schedules, safety measures, and a spill response plan.
WQ0000185 Version 2.1 Shell Version 090204 Page 3 of 9

2. -Upon classification of the wastewater treatment and high -rate infiltration facilities by the Water
Pollution Control System Operators Certification Commission (WPCSOCC), the Permittee shall
designate and employ a certified operator to be in responsible charge (ORC) and one or more certified
operator(s) to be back-up ORC(s) of the facilities in accordance with 15A NCAC 08G .0200. The
ORC shall visit the facilities in accordance with 15A NCAC 08G .0200 or as specified in this permit
and shall comply with all other conditions specified in these rules.
3. The high rate infiltration fields shall be raked as needed to remove vegetation, solids, and to level the
fields.
4. The high rate infiltration fields shall be raked twice weekly during the months of April through
October and once a week during the months of November through March.
5. The application of chemicals to the high rate infiltration fields is expressly prohibited.
6. The elevation of the base of each remaining rotary distributor shall be at least 13 feet above mean sea
level (AMSC).
7. Adequate measures shall be taken to prevent wastewater ponding or runoff from the high -rate
infiltration fields.
8. Adequate measures shall be taken to divert stormwater from the high -rate infiltration area.
9. Should the application of treated wastewater to either 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.
10. High -rate infiltration shall not be performed when the ground is in a condition that will cause ponding
or runoff.
11. 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.
12. No type of wastewater other than that from Ocean Sands Development shall be disposed onto the
high -rate infiltration area.
13. An automatically activated standby power source shall be on site and operational at all times capable
of powering all essential treatment units. If a generator is employed as an alternate power supply, it
shall be tested weekly by interrupting the primary power source.
14. No traffic or equipment shall be allowed on the disposal area except while installation occurs or while
normal maintenance is being performed.
15. Public access to the land application sites shall be controlled.
16. The residuals (including screenings) generated from these treatment facilities must be disposed /
utilized in accordance with 15A NCAC 02T .1100. The Permittee shall maintain a residual
management plan pursuant to 15A NCAC 02T .0708.
17. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited.
18. The chlorine tables used in the disinfection facility shall be of the type specified in the plans and
specifications approved by the Division.
WQ000018 5 Version 2.1 Shell Version 090204 Page 4 of 9

IV. MONITORING AND REPORTING REQUIREMENTS
Any monitoring (including groundwater, surface water, soil or plant tissue analyses) deemed
necessary by the Division to ensure surface and ground water protection will be established and an
acceptable sampling reporting schedule shall be followed.
2. All laboratory analyses for effluent, ground waters, or surface waters shall be made by a laboratory
certified by the Division for the required parameter(s) under 15A NCAC 02H .0800.
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 consistent with
approved engineering and scientific practices to ensure the accuracy and reliability of flow
measurement. Flow measurement devices selected shall be capable of measuring flows with a
maximum deviation of less than 10 percent from true flow, accurately calibrated at a minimum of
once per year, and maintained to ensure that the accuracy of the measurements is consistent with the
accepted capability of that type of device. The Permittee shall keep records of flow measurement
device calibration on file for a period of at least three years. At a minimum, data to be included in
this documentation shall be:
a. Date of flow measurement device calibration,
b. Name of person performing calibration, and
c. Percent from true flow.
4. The effluent from the subject facilities shall be monitored by the Permittee at the frequency(ies) and
location(s) for the parameter(s) 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 tracking the amount of wastewater disposed shall maintain adequate records. These
records shall include, but are not necessarily limited to, the following information:
a. Date of high -rate infiltration,
b. Volume of wastewater infiltrated,
c. Field infiltrated,
d. Length of time field is infiltrated,
e. Loading rates to each infiltration site list in Attachment B,
f. Weather conditions, and
6. A record shall be maintained of all residuals removed from this facility. This record shall include the
name of the hauler, permit authorizing the disposal or a letter from a municipality agreeing to accept
the residuals, date the residuals were hauled, and volume of residuals removed.
7. A maintenance log shall be maintained at this facility including but not limited to the following items:
a. Visual observations of the plant and plant site.
b. Record of preventative maintenance (changing of filters, adjusting belt tensions. alarm testing,
diffuser inspections and cleanings, etc.).
c. Date of calibration of flow measurement device.
d. Date and results of power interruption testing on alternate power supply.
8. Monitor 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.
WQ0000185 Version 2.1 Shell Version 090204 Page 5 of 9

Id
9. Two copies of the results of the sampling and analysis must be received on Form GW -59
(Groundwater Quality Monitoring: Compliance Report Form), along with attached copies of
laboratory analyses, by the Division of Water Quality, Information Processing Unit, 1617 Mail
Service Center, Raleigh, North Carolina 27699-1617 on or before the last working day of the month
following the sampling month. Form GW -59 shall include the number of this permit and the
appropriate well identification number. One Form GW -59a certification form shall be provided for
each set of sampling results submitted.
10. Three copies of all monitoring data [as specified in Conditions IV.3. and IVAJ on Form NDMR for
each point prior to irrigation (PPI) and three copies of all operation and disposal records [as specified
in Conditions IV.5. and IV.6.] on Form NDAR-2 for every infiltration area 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
11. 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 wastewater treatment facility which results in the treatment of significant
amounts of wastes which are abnormal in quantity or characteristic, such as the dumping of the
contents of a sludge digester; the known passage of a slug of hazardous substance through the
facility; or any other unusual circumstances including ponding in the high -rate infiltration area or
runoff from the high -rate infiltration.
b. Any process unit failure, due to known or unknown reasons, that render the facility incapable of
adequate wastewater treatment such as mechanical or electrical failures of pumps, aerators,
compressors, etc.
c. Any failure of disposal system resulting in a by-pass directly to receiving waters.
d. Any time that self-monitoring information indicates that the facility has gone out of compliance
with its permit limitations including, but not limited to, freeboard measurements, effluent
limitations, exceedances of groundwater standards, or overloading of any infiltration area.
For any emergency that requires immediate reporting (e.g., discharges to surface waters, imminent
failure of a storage structure, etc.) outside normal business hours must be reported to the Division's
Emergency Response personnel at telephone number [phone], [phone], or (919) 733-
3300. Persons reporting such occurrences by telephone shall also file a written report in letter form
within five (5) days following first knowledge of the occurrence. This report must outline the actions
taken or proposed to be taken to ensure that the problem does not recur.
V. INSPECTIONS
1. Adequate inspection and maintenance shall be provided by the Permittee to ensure proper operation
of the subject facilities.
WQ0000185 Version 2.1 Shell Version 090204 Page 6 of 0

2. The Permittee or his designee shall inspect the wastewater treatment and disposal facilities to prevent
malfunctions and deterioration, operator errors and discharges which may cause or lead to the release
of wastes to the environment, a threat to human health, or a nuisance. The Permittee shall keep an
inspection log or summary including at least the date and time of inspection, observations made, and
any maintenance, repairs, or corrective actions taken by the Permittee. This log of inspections shall
be maintained by the Permittee for a period of five years from the date of the inspection and shall be
made available upon request to the Division or other permitting authority.
3. Any duly authorized officer, employee, or representative of the Division may, upon presentation of
credentials, enter and inspect any property, premises or place on or related -to the disposal site or
facility at any reasonable time for the purpose of determining compliance with this permit; may
inspect or copy any records that must be maintained under the terms and conditions of this permit,
and may obtain samples of groundwater, surface water, or leachate.
VI. GENERAL CONDITIONS
1. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee
to an enforcement action by the Division in accordance with North Carolina General Statute 143-
215.6A to 143-215.6C.
This permit shall become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other supporting data.
This permit is effective only with respect to the nature and volume of wastes described in the
application and other supporting data. No variances to applicable rules governing the construction
and / or operation of the permitted facilities are granted unless specifically requested and granted in
this permit.
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 government agencies (local, state,
and federal) that have jurisdiction. 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, and any requirements pertaining to
wetlands under 15A NCAC 02B .0200 and 02H .0500.
5. In the event there is a desire for the facilities to change ownership, or there is a name change of the
Permittee, a formal permit request must be submitted to the Division on official Division forms,
documentation from the parties involved, and other supporting materials as may be appropriate. The
approval of this request will be considered on its merits and may or may not be approved. The
Permittee of record shall remain fully responsible for compliance until a permit is issued to the new
owner.
The Permittee shall retain a set of 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.
WQ00001 S5 Version 2.l Shell Version 090204 Page 7 of 9

8. The Permittee must pay the annual fee within 30 days after being billed by the Division. Failure to
pay the fee accordingly may cause the Division to initiate action to revoke this permit pursuant to
15A NCAC 02T .0105(e).
CPermit issued this the 11 th of March, 2009
c
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
C
H.002 Hins, Director
Di 'cion o Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0000185
WQOOOO185 Version 2.1 Shell Version 090204 Page 8 of u

Permit No. WQ0000185
March 11, 2009
ENGINEER'S CERTIFICATION
Partial Final
I, , as a duly registered Professional Engineer in the State
of North Carolina, having been authorized to observe (periodically, weekly, full time) the construction of
the project,
Project Name Location and Countv
for the Permittee hereby state that, to the best of my abilities, due care and diligence was used in the
observation of the construction such that the construction was observed to be built within substantial
compliance and intent of this permit, the approved plans and specifications, and other supporting
materials.
Signature
Date
Registration No.
WQ0000185 Version 2.1 Shell Version 090204 Page 9 of 9

ATTACHMENT A - LIMITATIONS AND MONITORING REQUIREMENTS
PPI 002 — WWTF Effluent
Permit Number: WQ0000185 Version: 2.1
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Parameter Description - PCS Code
Monthly Average
Weekly Average
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/1
Weekly
Composite
BOD, 5 -Day (20 Deg. C) - 00310 - Winter'
10
mg/1
15
mg/I
2 X Month
Composite
Solids, Total Suspended - 00530 - Summer'
20
mg/1
30
mg/I
Weekly
Composite
Solids, Total Suspended - 00530 - Winter'
20
mg/I
30
mg/l
2 X Month
Composite
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Summer(geom.mean) Z
14
#/100 ml
43
#/100 ml
Weekly
Grab
Coliform. Fecal MF, M -FC Broth,44.5C - 31616 - Winter' (geom.mean) Z
14
#/100 ml
43
#/100 ml
2 X Month
Grab
Nitrogen, Ammonia Total (as N) - 00610 - Summer
4
mg/I
6
mg/I
Weekly
Composite
Nitrogen, Ammonia Total (as N) - 00610 - Winter'
4
mg/I
6
mg/1
2 X Month
Composite
Nitrogen, Nitrate Total (as N) - 00620 - Summer'
Weekly
Composite
Nitrogen, Nitrate Total (as N) - 00620 - Winter'
2 X Month
Composite
Chlorine. Total Residual - 50060
5 X Week
Grab
pH - 00400
6.0-9.0
SAL
5 X Week
Grab
Solids, Total Dissolved - 70295
3 X Year 3
Composite
Chloride (as Cl) - 00940
3 X Year 3
Composite
1. Summer sampling shall be April through October; Winter sampling shall be November through March.
2. Monthly average for Fecal Coliform shall a geometric mean.
3. 3 X Year sampling shall be conducted in February, July, and December.
WQ0000185 Version 2.1 Attachment A Pagel of 2

ATTACHMENT A - LIMITATIONS AND MONITORING REQUIREMENTS
SW -1, SW -2, and SW -3 — Surface Water Monitoring Locations (locations shown in Figtu
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Parameter Description - PCS Code
Monthly Average
Weekly Average
Daily Maximum
Measurement
Frequency
Sample
Type
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Summer 1 (geom.mean) 2
Weekly
Grab
Coliform, Fecal MF, M -FC Broth,44.5C - 31616 - Winter' (geom.mean) Z
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
Summer sampling shall be April through October; Winter sampling shall be November through March.
Monthly average for Fecal Coliform shall a geometric mean.
WQ00000ersion 2.1 Attachment A ®age 2 of

ATTACHMENT B - APPROVED LAND APPLICATION SITES AND LIMITATIONS Permit Number: WQ0000185 Version: 2.1
Currituck County — Ocean Sands
INFILTRATION AREA INFORMATION
APPLICATION LIMITATIONS
Field/
Basin
Owner
County
Latitude
Longitude
Net
Acreage
Dominant
Soil Series
Parameter
Rate
Yearly
Max
Units
I
Currituck County
Currituck
36* 19'23"
75°48'53"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
2
Currituck County
Currituck
36°19'22"
75°48'53"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft
3
Currituck County
Currituck
36° 19'23"
75°48'52"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
4
Currituck County
Currituck
36°19'22"
7548'52"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
5
Currituck County
Currituck
36°19'24"
75°48'51"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
6
Currituck County
Currituck
36019'23"
75048'51"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
7
Currituck County
Currituck
36'19'24"
75048'49"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
8
Currituck County
Currituck
36019'23"
75048'49"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
9
Currituck County
Currituck
36°19'24"
75°48'48"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft
10
Currituck County
Currituck
3619'23"
75048'48"
0.18
01284 - Application Surface Irrigation
7.65
gpd/ft2
Total
1.80
WQ0000185 Version 2.1 Attachment B Page 1 of 1

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O O O

ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS
Monitoring wells: MW -4, MW -5, MW -6, MW -7, MW -8, and MW -9.
Permit Number: WQ0000185 Version: 2.1
GROUNDWATER CHARACTERISTICS
GROUNDWATER STANDARDS
MONITORING REQUIREMENTS
Parameter Description - Parameter Code
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
Water level, distance from measuring point - 82546
4 X year
Calculated
1,2,3
pH - 00400
6.0 s.u.
8.5 s.u.
4 X year
Grab
1,2
Coliform, Fecal MF, M -FC Broth,44.5C - 31616
4 X year
Grab
I
Solids. Total Dissolved- 180 Deg.0 - 70300
500 mg/I
4 X year
Grab
Carbon, Tot Organic (TOC) - 00680
4 X year
Grab
1,6
Chloride (as Cl) - 00940
250 mg/I
4 X year
Grab
I
Nitrogen, Ammonia Total (as N) - 00610
4 X year
Grab
I
Nitrogen, Nitrate Total (as N) - 00620
10 mg/I
4 X year
Grab
I
Volatile Compounds, (GC/MS) - 78732
Semi-annually
Grab
1,4.5
1. 4 X year monitoring shall be conducted in February, July, September, and December; Semi -Annual monitoring shall be conducted in February and December.
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 pH 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 February and December only, analyze by one of the following methods:
a. Standard Method 6230D, PQL at 0.5 pg/L or less
b. Standard Method 621OD, PQL at 0.5 pg/L or less
C. EPA Method 8021, Low Concentration, PQL at 0.5 µg/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 be DWQ certified to run any method used.
b. The method used must, at a minimum, include all the constituents listed in Table V111 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 [phone], must be contacted immediately for further instructions regarding any additional follow-up analyses required.
WQ000018.5 Version 2.1 Attachment C Pagel of 2

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/I, 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.
7. .Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure 1 and this Attachment.
WQOOOIxersion 2.1
0 Attachment C
Page 2 of 2

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