WQ0004495_Final Permit_19910930

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State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
.Fames G. Martin, Governor
William W. Cobey, Jr., Secretary
September 30, 1991
Mr. Paul D. Dennis, President
S. T. Utility Company
651 Clubhouse Road
Sunset Beach, North Carolina 28468
George T. Everett, Ph.D
Director
Subject: Permit No. WQ0004495
S. T. Utility Company
The Colony at Oyster Bay
Subsurface Disposal System
Brunswick County
Dear Mr. Dennis:
f In accordance with your application received December 11, 1991, we are forwarding herewith
Permit No. WQ0004495, dated September 30, 1991, to S. T. Utility Company for the continued operation
of a 40,000 GPD subsurface wastewater disposal system.
This permit shall void Permit Nos. 12490 and 12490R issued to Oyster Bay Utilities, Incorporated
and shall be effective from the date of issuance until August 31, 1996, and shall be subject to the
conditions and limitations as specified therein. Please pay particular attention to the monitoring
requirements in this permit. Failure to establish an adequate system for collecting and maintaining the
required operational information will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable to you, you have
the right to request an adjudicatory hearing upon written request within 30 days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
Regional Offices
Asheville Fayetteville MoorvsviIle Raleigh Washington Wilmington Winston-Salem
70.1/251-6208 919/486-1541 704/653-1699 919/733-2314 919/946-6481 919/395-3900 919/761-2351
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

If you need additional information concerning this matter, please contact Ms. Angela Y_ Griffin at
9191733-5083.
cc: Brunswick Count, Health Department
Wilmington Regional Office
Groundwater Section
Training and Certification Unit
Facilities Assessment
Mr. Joseph S. Hill, Jr., P. E.

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SUBSURFACE DISPOSAL 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 1S HEREBY GRANTED TO
S. T. Utility Company
Brunswick County
FOR THE
continued operation of a 0.040 MGD wastewater treatment facility consisting of an inlet bar screen, a
16,000 gallon capacity equalization tank equipped with dual 190 GPM submersible pumps and high water
alarms, a blower capable of delivering 42 CFM, a flow splitter, and effluent recording flow meter, four (4)
10,000 gallon capacity aeration tanks, two (2) 3,350 gallon capacity clarifiers, one 6,000 gallon capacity
sludge holding tank, two (2) blowers capable of delivering 200 CFM each, an 835 gallon capacity chlorine
contact tank with a tablet chlorinator, a dual cell tertiary treatment unit with a total surface area of 27.8
square feet, a 2,085 gallon capacity clear well with dual 208 GPM submersible pumps, a 2,400 gallon
capacity mudwell with dual 28 GPM submersible pumps and high water alarms, a blower unit capable of
delivering 20 CFM, dual 440 GPM submersible dosing pumps, a 30 kW auxillary power generator, three
(3) nitrification fields with a total area of 50,340 square feet, a sewer collection system consisting of
approximately 1,650 linear feet of 6 -inch force main and associated appurtenances to serve The Colony at
Oyster Bay Condominiums, Phase I and the discharge of 40,000 GPD of collected domestic wastewater
into S. T. Utility Company's existing sewerage system, pursuant to the application received December 11,
1990, and in conformity with the project plan, specifications, and other supporting data subsequently filed
and approved by the Department of Environment, Health and Natural Resources and considered a part of
this permit.
This permit shall void Permit Nos. 12490 and 12490R issued to Oyster Bay Utilities, Incorporated
and shall be effective from the date of issuance until August 31, 1996 and shall be subject to the following
specified conditions and limitations:
I. PERFORMANCE STANDARDS
1. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be. required by this Division, such as construction of additional or replacement
wastewater treatment or disposal facilities.
2 . The issuance of this permit shall not relieve the Permittee of the responsibility for damages
to surface or groundwaters resulting from the operation of this facility.
This permit shall become voidable if the soils fail to adequately absorb the wastes and may
be rescinded unless the facilities are installed, maintained, and operated in a manner which
will protect the assigned water quality standards of the surface waters and ground waters.
1

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4. Adequate measures shall be taken to divert stormwater from the disposal area and prevent
wastewater runoff from the subsurface disposal field.
5. The sludge generated from these treatment facilities must be disposed of in accordance with
General Statute 143-215.1 and in a manner approved by the North Carolina Division of
Environmental Management.
6. A usable reserve area shall be maintained for wastewater disposal. The reserve area shall
have the capability of accommodating the average daily flow of the facility being served
without exceeding the loading rates of the reserve area while meeting all required buffer
requirements.
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 15 NCAC 2H
.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.
7. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
The following buffers shall be maintained:
a) 100 feet between disposal area and any public or private water supply including
wells
b) 100 feet between disposal area and "SA and SB" classified surface waters
C) 50 feet between disposal area and any stream, lake, river or natural drainageway
d) 50 feet between disposal area and property lines
e) 10 feet between disposal area and surface water interceptor drains or diversions
(upslope)
f) 25 feet between disposal area and surface water interceptor drains or diversions
(downslope) and groundwater drainage systems.
These buffers were not included in previous permits for this waste treatment and disposal
system. Therefore, they are not intended to require modification of existing facilities to
obtain compliance. They do however apply to any modification of the waste treatment
facilities, any new construction within the area of influence of these buffers, and the sale of
property that would cause any of the buffers now complied with to be violated.
9. The Permittee shall provide for the pump station and force main the following items:
a. Pump on/off elevations located so that 2-8 pumping cycles may be achieved per
hour in the pump station.
b . An air relief valve located at all high points along the force main.
c . A screened vent for the wet well.
d. Fillets located in the wet well at the intersection of the flooring and sidewalls.
e. Three feet of cover (minimum) over the force main or the use of ferrous material
where three feet cannot be maintained.
f. Sufficient devices which will protect the pump station from vandals.
g. Flood protection if the pump station is located below the 100 -year flood elevation.
11. OPERATION _AND MAINTENANCE BEQUIREMENTS
The facilities shall be properly maintained and operated at all times.
2

2. Upon classificaa"65n of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge of the
wastewater treatment facilities. The operator must hold a certificate of the type and grade at
least equivalent to the classification assigned to the wastewater treatment facilities by the
Certification Commission.
3. The application rates to the disposal field shall not exceed the limit approved in the original
specifications.
4. 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.
5. No traffic or equipment shall be allowed on the disposal area except while installation
occurs or while normal maintenance is being performed.
6. A suitable cover shall be maintained on the LPP field(s) and the field(s) shall be routinely
mowed. The clippings shall be periodically removed to prevent the build-up of thatch.
7. The screenings removed from the wastewater treatment plant shall be properly disposed of
in a sanitary landfill.
An automatically activated standby power supply shall be on site and operational at all
times. If a generator is employed as the alternate power supply, it shall be tested weekly by
interrupting the primary power source.
9. The chlorine tablets used in the chlorination unit shall be of the kind and type as specified in
the plans and specifications approved by the Division.
10. The flow measurement device shall be calibrated annually by a representative of a firm
which is routinely engaged in the calibration of flow measurement devices. Records of the
calibration, including all information pertinent to the calibration, shall be available during
any inspection by Division staff.
11. Diffusers shall be cleaned as needed to assure adequate aeration. Records of maintenance
shall be maintained by the permittee.
111. MONITORING AND REPORTING REQUIREMENTS
Any monitoring deemed necessary by the Division of Environmental Management to insure
surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
2. The low pressure lines shall be maintained as necessary (including purging of the lines and
pressure testing) in order to ensure that they remain free of obstructing materials and that
the pressure head on the laterals remains within the design specifications. The highest and
lowest laterals on each subfield shall be checked (and adjusted as necessary) annually to
ensure that the pressure heads are within the approved specifications. if adjustments are
necessary to the highest and lowest laterals, the remaining laterals in that subfield shall also
be checked and adjusted to the approved specifications. Adequate records showing all
maintenance shall be maintained by the Permittee.
3

These records should include but are not fiinited to the following:
Items Inspection Frequency
a) Individual dosing pump operation Monthly
b) Individual field rotation Monthly
C) High water alarms Monthly
d) Residual pressure on highest and
lowest lateral on each subfield Annually
3. As an indicator of proper operation and maintenance, the facility shall produce an effluent
in compliance with the following limitations:
Parameter MonthlyAveragea Daily Maximumb
Flow MGD 40,000 GPD
BODS 10 mg/l 15 mg/l
NH3 as N 4 mg/1 6 mg/l
TS S 20 mg/l 30 mg/1
a Monthly average shall be the arithmetic mean of all samples collected during the reporting
period.
b Daily maximum shall be the maximum value of all samples collected during the reporting
period.
The effluent from the subject facilities shall be monitored by the Permittee at the point prior
to discharge to the subsurface disposal field for the following parameters:
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
* 2/Month sampling frequency only during the months of April through October. During
the remainder of the year, these parameters shall be monitored monthly.
** Triannual sampling frequency shall correspond with triannual monitoring of wells
required by Groundwater monitoring conditions.
If Groundwater sampling indicates or predicts problems with the compliance with
Groundwater Standards, this permit will be modified to include additional and/or more
restrictive limitations.
F51
Location of
Measurement
Sample
Parameter
Sampling Points _
Frequency
Type
BODS, 5 -day, 20C
Effluent
*2/Month
Composite
NH3 as N
Effluent
*2/Month
Composite
TSS
Effluent
*2/1\4onth
Composite
Fecal Coliform
Effluent
*2/Month
Grab
Flow
Influent or Effluent
Continuous
Recording
Settleable Matter
Effluent
Daily
Grab
Residual Chlorine
Effluent
Daily
Grab
NO3
Effluent
**Triannually
Grab
TDS
Effluent
**Triannually
Grab
TOC
Effluent
**Triannually
Grab
Chloride
Effluent
**Triannually
Grab
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
* 2/Month sampling frequency only during the months of April through October. During
the remainder of the year, these parameters shall be monitored monthly.
** Triannual sampling frequency shall correspond with triannual monitoring of wells
required by Groundwater monitoring conditions.
If Groundwater sampling indicates or predicts problems with the compliance with
Groundwater Standards, this permit will be modified to include additional and/or more
restrictive limitations.
F51

4. Three copies of all operation and maintenance records (as specified in condition 1212) and
all effluent monitoring data (as specified in condition III 3) shall be submitted on or before
the last day of the following month to the following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
5. 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.
6. A maintenance log shall be maintained at this facility including but not limited to the
following items:
a. Daily sampling results including residual chlorine, settleable matter, and dissolved
oxygen in the aeration basin and at the clarifier weir.
b. Visual observations of the plant and plant site.
c. Record of preventative maintenance (changing of filters, adjusting belt tensions,
alarm testing,diffuser inspections and cleanings, etc.).
d. Date LPP lines were purged and pressures equalized.
e. Date of calibration of flow measurement device.
f. Date and results of power interruption testing on alternate power supply.
7. Noncompliance Notification:
The Permittee shall report by telephone to the Wilmington Regional Office, telephone no.
(91) 395-3900, 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 basin or tank; the known passage of a slug of
hazardous substance through the facility; or any other unusual circumstances.
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 a pumping station, sewer line, or treatment facility resulting in a by-
pass of all or any portion of the influent to such station or facility.
d. Any time that self-monitoring information indicates that the facility has gone out of
compliance with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in letter
form within 15 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.
5

IV.
Existing monitoring well MW -2 shall be abandoned in accordance with 15A NCAC 2L
(Well Construction Standards).
2. Within 90 days of permit issuance a new monitoring well to -replace monitoring well MW -2
shall be installed to monitor groundwater quality. The well shall be constructed such that
the water level in the well is never above or below the screened portion of the well at any
time during the year.
However, the exact location and construction details for the well shall be approved by the
Wilmington Regional Office, from which a well construction permit must be obtained.
3. The monitoring wells shall be sampled initially after construction and all monitoring wells
thereafter every March, July and November for the following parameters:
NO3 (1.0.0)
TDS (500.0)
pH (6.5 - 8.5 Standard Units)
Chloride (250.0)
Total Suspended Solids
NO2 (1A
Volatile Organic Compounds
below).
Ammonia Nitrogen
TOC
Water Level
Fecal Coliforms (1/100ml)
Orthophosphate
- In November only (by Method 1 or Method 2
The numbers in parentheses represent the maximum allowable concentrations in
groundwater for the various analytical parameters, as specified in 15A NCAC 2L
[Groundwater Classifications and Standards]. Unless otherwise specified the units for
these concentrations are expressed as milligrams per liter.
Method 1: Method 6230D (Capillary - Column), "Standard Methods For The Examination
of Water and Wastewater", 17th ed., 1989.
Method 2: Method 502.2 "Methods For The Determination of Organic Compounds in
Drinking Water", U.S. EPA - 600/4-88/039.
The measurement of water level must be made prior to sampling for the remaining
parameters.
The measuring points (top of well casing) of all monitoring wells shall be surveyed to
provide relative elevations of the measuring point for each of the monitoring wells. The
depth of water in each well shall be measured from the surveyed point on the top of the
casing.
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 exceedances of this naturally occurring
TOC concentration in the downgradient wells shall be subject to the additional sampling
and analysis as described above.

If any volati enorganic compounds are detected by method 5230D, or the equivalent method
502.2, then EPA methods 604 and 611 must also be run to detect other organic compounds
which may be present. The results of all analyses specified in the monitoring requirements,
including 604 and 611 if required, must be submitted simultaneously.
The results of the sampling and analysis shall be sent to the N.C. Division of
Environmental Management on Form GW -59 (Compliance Monitoring Report Form) every
April, August and December.
4, The Compliance Boundary delineated on the attached site map for the disposal system is
specified by regulations in 15A NCAC 2L, Groundwater Classifications and Standards.
An exceedance of Groundwater Quality Standards beyond the Compliance Boundary is
subject to the penalty provisions applicable under General Statute 143-215.6(1)a. The sale
of property, by the Permitfee, which is within or contiguous to the disposal site, may alter
the location of the Compliance Boundary.
For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the subsurface field, or 50 feet within the
property boundary.
If the title to any property which may affect the location of the Compliance Boundary is
changed, the Permittee shall notify the DEM Director within 14 days. The Director shall
then establish a modified Compliance Boundary which will be done as a modification to the
Permit.
The REVIEW BOUNDARY delineated on the attached site map for the disposal system is
specified by regulations in 15 NCAC 2L, Groundwater Classifications and Standards. A
REVIEW BOUNDARY is established around disposal systems midway between the
Compliance Boundary and the perimeter of the waste disposal area. When the
concentration of any substance equals or exceeds the maximum allowable concentration of
that substance at the REVIEW BO NDAR , as determined by monitoring, the permittee
shall either (i) demonstrate, through predictive calculations or modeling, that natural site
conditions, facility design and operational controls will prevent a violation of standards at
the Compliance Boundary; or, (ii) submit a plan for the alteration of existing site
conditions, facility design or operational controls that will prevent a violation of standards
at the Compliance Boundary, and implement that plan upon its approval by the Director.
5. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall
be provided.
V . INSPECTIONS
1. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
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 three years from the date of the inspection and shall be made available upon
request to the Division of Environmental Management or other permitting authority,
7

3 . Any duly authorized office employee, or representative of the Division of Environmental
Management may, upon presentation of credentials, enter and inspect any property,
premises or place on or related to the disposal site and facility at any reasonable time for the
purpose of determining compliance with this permit; may inspect or copy any records that
must be kept under the terms and conditions of this permit; or may obtain samples of
groundwater, surface water, or leachate.
Vi. GENERAL CONDITIONS
1. This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans, specifications and other supporting data.
2. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
3. This permit is not transferable. In the event there is 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 of Environmental Management accompanied by an application
fee, 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.
4. Prior to any transfer of this land, a notice shall be given to the new owner that gives full
details of the materials applied or incorporated at this site.
5. A set of approved plans and specifications for the subject project must be retained by the
applicant for the life of the project.
6. The annual administering and compliance fee must be paid by the Permittee within thirty
(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 as specified by 15 NCAC 2H .0205
(c)(4)•
7. FaiIure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Environmental Management in
accordance with North Carolina General Statute 143-215.6.
8. The wastewater treatment facility shall connect to a publicly owned areawide sewage
collection system within 180 days of its availability. All discharge of wastewater to the
system shall cease at the time of the connection to the sewerage collection system..
9. The issuance of this permit does not preclude 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) which have jurisdiction.
10. The Permittee, at least six (6) months prior to the expiration of this permit, shall request its
extension. Upon receipt of the request, the Commission will review the adequacy of the
facilities described therein, and if warranted, will extend the permit for such period of time
and under such conditions and limitations as it may deem appropriate.

11. `i he Franchise Letter must be submitted to the Wilmington Regional Office within 90 days
of issuance of this permit. Failure to do so will void this permit.
Permit issued this the 30th day of September, 1991
NORTH CAROLINA
George T. Ev ett, irec or
Division of Ez virorunen l
By Authority o the En ' of
Permit No. WQ0004495
ONMENTAL MANAGEMENT COMMISSION
Management Commission
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