WQ0004059_Final Permit_20021118

Hof wArFRo
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
O Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
November 18, 2002
MR. WILLIAM T. SMITH, PRESIDENT
SUGARLOAF UTILITY, INC.
203 EAST W HiTAKER MI LL ROAD, S U ITE 109
RALEIGH, NC 27608
Subject: Permit No. W00004059
Sugarloaf Utility, Inc.
Atlantic Station
Wastewater Rotary Distributor Facilities
Carteret County
Dear Mr. Smith:
In accordance with your renewal request received December 27, 2001, we are forwarding
herewith Permit No. W00004059, dated November 18, 2002, to Sugarloaf Utility, Inc, for the continued
operation of the subject wastewater rotary distributor facilities.
This permit shall be effective from the date of issuance until October 31, 2007, shall void Permit
No. W00004059 issued February 24, 1998, and shall be subject to the conditions and limitations as
specified therein.
Please read the conditions of your permit carefully. Permit conditions may have been
added, modified, or deleted since the last issuance of the permit. 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.
During recent inspections, Division staff has observed several violations at the plant that
require immediate action. The rotary distribution fields were observed in various states
ranging from being covered with heavy vegetative growth to having been mowed to having
been recently tilled. Staff also noticed the effects of inadequate inspection, and operation
and maintenance at the treatment facility. Therefore, please note Permit Conditions 11.1, 11.6
and 11.8 regarding proper routine maintenance of the rotary distribution fields, and Condition
IVA regarding the inspection, maintenance, and cleaning of the facilities to ensure proper
operation.
Permit Condition 111.2 requires you to install an appropriate flow measurement device and
report daily flow values on Form NDMR.
• Permit Condition 1VA requires you to properly label all monitoring wells (with the exception
of MW-1 and MW-2). This condition also allows for the temporary abandonment of monitor
well MW-3.
• Permit Condition IV.2(a) has been amended to remove the requirement to sample MW-3.
.A
Non -Discharge Permitting Unit Internet http://h2o.enr.nc_state.us/ndpu NMEM
1617 Mail Service Center, Raleigh, NC 27699-1617 Telephone [phone] Fax [phone]
DENR Customer Service Center Telephone [phone]
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Due to periodic exceedances of 2L Groundwater Standards for Nitrate, Chloride, and Total
Dissolved Solids (TDS), monitoring well MW-4A has been included in your sa;npling
program, as noted in Permit Condition IV.2(a).
Permit Condition IV.4 indicates that waste application activities should not occur when the
vertical separation between depth of application and the water table is at less than three (3)
feet.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of
this permit. This request must 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, 6714 Mail Service
Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and
binding.
If you need additional information concerning this permit, please contact Kristin E. Miguez of the
Non -Discharge Permitting Unit at [phone] extension 524. If you have any questions or
concerns regarding the Groundwater Requirements of this permit, please contact Debra Watts of the
Groundwater Section at [phone].
Sincerely,
for Alan W. Klimek, P.E.
cc. Carteret County Health Department
Wilmington Regional Office, Water Quality Section
Wilmington Regional Office, Groundwater Section
Groundwater Section, Central Office
Technical Assistance and Certification Unit
Non -Discharge Compliance/Enforcement Unit
Water Quality Central Files
NDPU Files
2

s
NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
HIGH RATE INFILTRATION SYSTEM PERMIT
WQ0004059
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
Sugarloaf Utility, Inc.
Carteret County
FOR THE
continued operation of 100,000 gallon per day wastewater rotary distributor facilities consisting of an
influent bar screen, a 20,000 gallon aerated flow equalization tank with dual 80-gallon per minute
submersible pumps and high water alarms, flow control box, dual extended aeration package plants,
each consisting of a 50,000 gallon aeration tank and a 8,333 gallon clarifier, dual 280 CFM blowers with
a stand-by blower of equal capacity, a 100,000 gallon per day tertiary filter unit including backwash
pumps and air scouring blowers, an 8,700 gallon sludge holding tank, a 2,084 gallon chlorine contact
tank with dual tablet type chlorinators, an effluent recording flow meter, a 5,863 gallon effluent dosing
tank with submersible pumps and high .water alarms, two (2) 86-foot diameter rotary distributors, an on -
site stand-by generator with sufficient capacity to operate the entire facility, and all associated piping,
valves, and appurtenances to serve Sugarloaf Utility, Inc.'s Atlantic Station, with no -discharge of wastes
to the surface waters, pursuant to the renewal request received December 27, 2001, 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 October 31, 2007, shall void Permit
No. WQ0004059 issued February 24, 1998, and shall be subject to the following specified conditions
and limitations:
I. PERFORMANCE STANDARDS
1. In the event that the facilities fall to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective actions, including those actions
that may be required by the Division of Water Quality (Division), such as the construction of
additional or replacement wastewater treatment or disposal facilities.

2. This permit shall become voidable if the soils fail to adequately assimilate 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. The ponding of wastewater on the surface of the distribution field when the dosing
cycle commences shall be considered as evidence of failure of the soils to adequately
assimilate the wastewater. Additionally, such failure shall be interpreted as a violation of
this permit condition.
3. The residuals generated from these treatment facilities must be disposed in accordance with
General Statute 143-215.1 and in a manner approved by the Division.
4. Adequate measures shall be taken to divert stormwater from the high rate infiltration area
and to prevent wastewater runoff.
5. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
6. 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.
7. The following buffers shall be maintained:
a) 400 feet between high rate infiltration unit and any habitable residence or place of public
assembly under separate ownership or which is to be sold,
b) 200 feet between high rate infiltration unit and any private or public water supply source
and any streams classified as WS or B,
c) 200 feet from mean high water between high rate infiltration unit and any "SA" or "SB"
classified surface waters,
d) 200 feet from normal high water between high rate infiltration unit and any other stream,
canal, marsh, or coastal waters,
e) 200 feet from normal high water between high rate infiltration unit and any Class I or
Class 11 impounded reservoir used as a source of drinking water,
f) 200 feet between high rate infiltration unit and any other lake or impoundment,
g) 200 feet between high rate infiltration unit and any Drainage systems (ditches, drains,
surface water diversions, etc.) and from any groundwater lowering and surface drainage
ditches,
h) 100 feet between high rate infiltration unit and property lines,
i) 50 feet between treatment units and property lines, and
j) 50 feet between high rate infiltration unit and other treatment units and public right of
ways.
Some of the buffers specified above may not have been included in previous permits for
this waste treatment and disposal system. These buffers are not intended to prohibit or
prevent modifications, which are required by the Division, to improve performance of the
existing treatment facility. These buffers do, however, apply to modifications of the
treatment and disposal facilities which are for the purpose of increasing the flow that is
tributary to the facility. These buffers do apply to any expansion or modification of the
high rate infiltration areas and apply in instances in which the sale of property would
cause any of the buffers now complied with, for the treatment and disposal facilities, to
be violated. The applicant is advised that any modifications to the existing facilities will
require a permit modification.
2

,.8. 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 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.
11. OPERATION AND MAINTENANCE REQUIREMENTS
The facilities shall be properly maintained and operated at all times.
2. Upon classification of the wastewater treatment and irrigation facilities by the Water Pollution
Control System Operators Certification Commission (W PCSOCC), 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 8G .0201. The ORC shall visit the facilities in accordance with 15A NCAC 8G .0204
or as specified in this permit and shall comply with all other conditions specified in these
rules.
3. The application rates for the high rate infiltration system shall not exceed 10 GPDlft2.
4. The facilities shall be effectively maintained and operated as a non -discharge system to
prevent the discharge of any wastewater outside of the high rate infiltration disposal area,
which result 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. The rotary distribution fields shall be raked twice weekly during the months April through
October and once a week during the months of November through March.
7. The screenings removed from the wastewater treatment plant shall be properly disposed in
a sanitary landfill or by other means that have been approved by this Division.
8. Vegetative growth must be kept out of the rotary distribution areas at all times. All
vegetation must be removed manually so that minimal disturbance will occur to the disposal
area.
9. The application of chemicals to the distribution field(s) is expressly prohibited.
10. An automatically activated standby power source 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.
11. 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 this
calibration, including all information pertinent to the calibration, shall be available during any
inspection by Division staff.
12. Diffusers shall be cleaned as needed to ensure that adequate aeration is provided. Records
of this maintenance shall be maintained by the permittee.
13. The chlorine tablets used in the disinfection facility shall be of the kind and type specified in
the plans and specifications approved by the Division.

MONITORING AND REPORTING REQUIREMENTS
1. Any monitoring deemed necessary by the Division to insure surface and ground water
protection will be established and an acceptable sampling reporting schedule shall be
followed.
2. Influent flow shall be continuously monitored and daily flow values shall be reported on Form
NDMR.
The Permittee shall install an appropriate flow measurement device consistent with
approved engineering and scientific practices to ensure the accuracy and reliability of
influent 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. Records of
flow measurement device calibration shall be kept on file by the Permittee 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
c. Percent from true flow
3. As an indicator of proper operation and maintenance, the facility shall produce an effluent in
compliance with the following limitations:
Parameter _-_- - Monthly Average" Daily Maximum c
Flow 100,000 gpd
BODS (5-day, 20°C) 10 mgh
NH3 as N 4 mgll
TSS 20 mgh
Fecal Coliform 14 per 100 ml6 43 per 100 ml
a
Monthly averages for all but fecal coliform shall be the arithmetic mean of all samples
collected during the reporting period. --
e
Monthly average for fecal coliform shall be the geometric mean of all samples collected
during the reporting period.
Daily maximum shall be the maximum value of all samples collected during the reporting
period.
4

4. The effluent from the subject facilities shall be monitored, by the Permittee, at the point prior
to discharge to the rotary distributors for the following parameters:
Parameter
Sampling Point
Sampling Frequency
_Type of Sample
Flow
Influent or Effluent
Continuous
Recording
BODE (5-day, 20°C)
Effluent
i2/Month
Composite
NH3 as N —
Effluent
i2/Month
Composite
TSS
Effluent
*2/Month
Composite
Fecal Coliform
Effluent
*2/Month
Grab
Settleable Matter
Effluent
Daily
Grab
Residual Chlorine
Effluent
Daily
Grab
NO3
Effluent
iiTriannually
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.
ii
Triannually sampling shall be conducted during March, July, and November.
If Groundwater sampling indicates or predicts problems with compliance with of the
Groundwater Standards, this permit will be modified to include additional and/or more
restrictive limitations.
5. Three (3) copies of all operation and disposal records (as specified in condition ill 3) on
Form NDAR-1 and three (3) copies of all effluent monitoring data (as specified in condition
111 3 and Ill 4) on Form NDMR-1 shall be submitted on or before the last day of the following
month. All information shall be submitted to the following address:
NC Division of Water Quality
Water Quality Section
Non -Discharge Compliance/Enforcement Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
6. A record shall be maintained of all residuals removed from this facility. The record shall
include the name of the hauler, the permit authorizing the disposal or a letter from a
municipality agreeing to accept the residuals, the date the residuals were hauled, and the
volume of residuals removed.
5

7. 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 of calibration of flow measurement device;
e. Date and results of power interruption testing on alternate power supply; and
f. Dates fields were raked and arms inspected.
8. Noncompliance Notification:
The Permittee shall report by telephone to the Wilmington Regional Office, telephone
number [phone], 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 renders 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; or
d. Any time that self -monitoring information indicates that the facility is not in compliance
with its permit limitations.
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.
IV. GROUNDWATER REQUIREMENTS
" Please contact Debra watts of the Groundwater Section at [phone] if you have any questions or concerns regarding the
Groundwater Requirements of this permit.
Well Construction / Well Abandonment Criteria:
Within sixty (60) days of permit issuance, all of the wells (active and inactive) at the site, with
the exception of MW-1 and MW-2 need to properly labeled and have complete descriptive
well tags according to the North Carolina Well Construction Standards 15A NCAC 2C .0108
(c)(11). Additionally, within sixty (60) days of permit issuance, monitor well MW-3 shall be
temporarily abandoned by securing the wellhead to prevent access by hand. The well shall
have a lockable cap and be locked in order to reasonably ensure against unauthorized
access and use [15A NCAC 2C .0108(c)(7)]. The well shall be further secured by placing a
compatible watertight cap or seal onto the riser pipe to prevent potential contamination from
entering the well.

2. Sampling Criteria:
a. Monitor wells MW-1, MW-2A, MW-4A, MW-5, and MW-6 (depicted on Figure 1) shall be
sampled March, July, and November for the following parameters. Prior to sampling the
parameters, the measurement of water -levels must be taken. The depth to water in
each well shall be measured from the surveyed point on the top of the casing. The
measuring points (top of well casing) of all monitoring wells shall be surveyed relative to
a common datum.
Water Level pH
Chloride Total Dissolved Solids (TDS)
Fecal Coliforms Total Organic Compounds (TOC)
Nitrate (NO3-N) Total Ammonia Nitrogen (NH3-N)
Total Phosphorous
Volatile Organic Compounds - In November only
b. If TOC concentrations greater than 10 mg/I are detected in any down -gradient
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 down -gradient wells shall be subject to the
additional sampling and analysis as described above.
c. Use one of the following methods for Volatile Organic Compounds (VOCs) sampled in
November:
1. Standard Method 6230D, Practical Quantitation Limit (PQL) at 0.5 ug/L or
less
2. Standard Method 6210, PQL at 0.5 ug/L or less
3. EPA Method 8021, Low Concentration, PQL at .0.5 ug/L or less
4. EPA Method 8260, Low Concentration, PQL at 0.5 ug/L or less
5. Another method with prior approval by the Groundwater Section Chief.
Any of the referenced methods used for VOCs must at a minimum, include all the
constituents listed in Table VIII of Standard Method 6230D. Any method used must
provide a PQL of 0.5 ug/L or less, which must be supported by laboratory proficiency
studies as required by the DWQ Laboratory Certification Unit. Any constituents detected
above the Method Detection Limit (MDL) but below the PQL of 0.5 ug/L must be
qualified (estimated) and reported.
d. A laboratory selected to analyze parameters must be DWQ certified for those
parameters required.
3. Reporting / Documentation:
a. All reports and documentation (GW-59) shall be mailed to the following address:
Groundwater Section
Permits and Compliance Unit
1636 Mail Service Center
Raleigh, NC 27699-1636
Updated blank forms may be downloaded from the Groundwater Section's web site at
http://q.ehnr.state.nc.us/ or requested from the address mentioned above,

b. The results of the sampling and analysis must be received on Form GW-59
(Groundwater Quality Monitoring: Compliance Report Form) by the Groundwater Section
on or before the last worming day of the month following the sampling month. The data
of all groundwater sampling and analyses required by the permit conditions must be
reported using the most recent GW-59 form along with attached copies of the laboratory
analyses.
4. Vertical Separation Requirements:
Waste application activities should not occur when the vertical separation between depth of
application and the water table is at less than three (3) feet. Verification of the water table
elevation can be confirmed by water level readings obtained from the monitor well(s) near
the site.
5. Applicable Boundaries:
a. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations in
15A NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary
is for the disposal system constructed after December 31, 1983 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 Quality
Standards at or beyond the Compliance Boundary is subject to immediate remediation
action according to 15A NCAC 2L .0106(d)(2).
b. 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 remediation action in
accordance with 15A NCAC 2L .0106(d)(1).
6. Additional Requirements:
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 maintain 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 to the
Division or other permitting authority, upon request.
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
This permit is effective only with respect to the nature and volume of wastes described in the
application and other supporting data.
2. This permit is not transferable. 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 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.
3. The subject wastewater treatment and disposal facilities shall be connected to an
operational publicly owned wastewater collection system within 180 days of its availability to
the subject facilities, if the subject wastewater treatment or disposal facilities are in
noncompliance with the terms and conditions of this non -discharge permit or the governing
statutes or regulations. Prior to the initiation of these connection activities, appropriate
approval must be received from this Division.
4. 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 15A NCAC 2H .0205
(c)(4).
5. 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.
6. 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.
7. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of this project.
8. 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.
Permit issued this the eighteenth day of November, 2002
NORTH" AROI_INA ENVIRONMENTAL MANAGEMENT COMMISSION
for Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0004059

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WATER POLLUTION CONTROL SYSTEM OPERATORS
CERTIFICATION COMMISSION
CLASSIFICATION
RATING SHEET FOR WATER POLLUTION CONTROL SYSTEMS
FACILITY INFORMATION:
NAME OF FACILITY: 1 I- rf-"N7 tC 1� `T, 91:3 r 0 kN / � e�l Ar,Al-)— L v % 1"
MAILING ADDRESS: -- 0-:;) Ft5- C.J El K E C- rf
C O N 1 1: f f j f4 C ( _
CONTACT PERSON: [: c f & -{ r s TELEPHONE: I")-)
PERMIT NO: U Check One: NC WQ HEALTH DP
ORC: ;,_ t l-r 0 TELEPHONE: (2j� 21-t 1
RATING INFORMATION: (Before completing this section, please refer to pages 2-4)
PERMITTED FLOW: 1 i , I _ _ MGD BNR? YES NO
CHECK CLASSIFICATION: WASTEWATER: 1 2 3 4
COLLECTION: 1 2 3 4
SPRAY IRRIGATION SUBSURFACE LAND APPLICATION
PHYSICAL/CHEMICAL GRADE I GRADE II
RATED BY: 6� (<-- REGION: l � () DATE:Z—
REGIONAL OFFICE TELEPHONE NUMBER: ( ) EXT:

Classification of Biological Water Pollution Control Treatment Systems:
Grade I Biological WPCS
- Septic tank/sandlilter systems
- Biological lagoon systems
- Constructed wetlands and associated appurtenances
Grade II Biological WPCS
- Systems that utilize an activated sludge or fixed growth process with a permitted flow
less than or equal to 0.5 million gallons per day (mgd)
Grade III Biological WPCS
- Systems that utilize an activated sludge or fixed growth process with a permitted flow
of greater than 0.5 through 2.5 million gallons per day (mgd)
- Grade II systems that are required to achieve biological nutrient reduction
Grade IV Biological WPCS
Systems that utilizing an activated sludge or fixed growth process with a permitted flow
of greater than 2.5 million gallons per day (mgd)
- Grade III systems that are required to achieve biological nutrient reduction
*Biological Nutrient Reduction -
The -reduction of total nitrogen or total phosphorous by an activated sludge orfixed growth
process as required by thefacilities permit.
Classification of Collection Water Pollution Control Systems:
(whichever provides lowest grade)
Same grade as biological water pollution control system. Grade of system:
Based on population served:
1,500. or Less = Grade I
1,501 to 15,000 = Grade II
15,001 to 50,ODD = Grade III
50,001 or more = Grade IV

Classification of Spray Irrigation Water Pollution Control Systems:
Systems which utilize spray irrigation for the reuse or disposal of wasterwater. .
These systems include: septic tanks, sand filter, oil/water separators, lagoons,
storage basins, screening, sedimentation. Systems other than those listed above
shall be subject to additional classification.
Classification of Land Application of Residuals Systems:
Systems permitted and dedicated for land application of residuals that are produced by a
water pollution control system or contaminated soils.
Classification of PhIsical/Cheinical Water Pollution Control Treatment Systems:
Grade I Physical/Chemical: Any water pollution control system that utilizes a primarily
physical process to treat wastewater. This classification includes groundwater
remediation systems. **
Grade II Physical/Chemical: Any water pollution control system that utilizes a primarily
chemical process to treat wastewater. This classification includes reverse osmosis,
electrodialysis, and ultrafiltration systems. ** _ _ . _
** Any water pollution control system that utilizes a phyicallchemicaI process to enhance an
activated sludge or fixed growth process, shall not be subject to additional classification.
Classification of Subsurface Water Pollution Control Systems:
Systems which utilize the soil for subsurface treatment and disposal of wastewater
and/or are required to have a certified operator under 15A NCAC 1 SA.1951. ***
*** Any subsurface system that has as part of its treatment process a water pollution control
systems that may be classified under Rules .0302 through .0307 of this section shall be
subject to addional classification.

Definitions
Activated Sludge - shall man a biological wastewater treatment process in which predominantly
biodegradable polluntants in wastewater are absorbed, or adsorbed by living aerobic organisms and
bacteria.
Chemical Process - shall mean a wastewater pollution control system process consisting
exclusively of the addition of chemicals to treat wastewater.
Collection System - shall mean a continuous connections of pipelines, conduits, pumping
stations, and other related constructions used to conduct wastewater to the water pollution
control system.
Electrodiaiysis System - shall mean a system utlizing a selective separation of dissolved solids
process that is based on electrical charge and diffusion through a semipermeable membrane.
Physical Process - shall mean any water pollution control system process consisting of
electrodialysis, adsorption, absorption, air stripping, gravirnetric sedimentation, floation, and
filtration as a means of treatment.
Reverse Osmosis System - shall mean a system which utilizes solutions and semipermable
membranes to separate and treat wastewater. - — -
Ultrafiltration System - shall mean a system which utilizes a membrane filter to remove
pollutants from wastewater.
Water Pollution Control System - shall mean any system for the collection, treatment, or
disposal of wastewater and is classified under the provision of G.S. 90A-37.
Note: Please refer to G.S. 90A-37for additional information and definitions.