WQ0011313_Final Permit_20010312

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Kerr T. Stevens, Director
March 12, 2001
IT V
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
RICK HALL, DIRECTOR OF RESORT DEVELOPMENT AND OPERATIONS
PEPPERTREE ATLANTIC BEACH OWNERS' ASSOCIATION, INC.
POST OFFICE BOX 6319
ASHEVILLE, NC 28816
Subject: Permit No. WQ0011313
Peppertree Atlantic Beach Owners' Association, Inc.
Pepper -tree Resorts Villas I, H, and III
Wastewater High -Rate Drip Irrigation Facility
Carteret County
Dear Mr. Hall:
In accordance with your renewal request received March 15, 2000, and subsequent additional
information received January 9, 2001, and February 27, 2001, we are forwarding herewith Permit No.
WQ0011313, dated March 12, 2001, to Peppertree Atlantic Beach Owners' Association, Inc. for the continued
operation of the subject wastewater treatment and spray irrigation facilities.
This permit shall be effective from the date of issuance until February 28, 2006, shall void Permit No.
WQ0011313 issued December 19, 1996, and shall be subject to the conditions and limitations as specified
therein. Please note the additional monitoring and re ortin requirements as outlined in Permit Condition 111.2
which require the Permittee to sam le the effluent for Nitrate Total Ammonia TDS and Chloride on a bi-
monthly basis in an effort to identify trends observed with contaminants found in groundwater sarm les. 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, you have the right to
request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit.
This request trust be in the forth 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
733-5083 extension 524.
cc: Carteret County Health Department
Wilmington Regional Office, Water Quality Section
Wilmington Regional Office, Groundwater Section
Groundwater Section, Central Office
Rose and Associates, PA
Technical Assistance and Certification Unit
Non -Discharge Compliance/Enforcement Unit
matter, please contact Kristin E.
Sincer y,
Ir` Kerr T. Stevens
Miguez at (919)
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

NORTH CAROLIiNA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
HIGH -RATE DRIP IRRIGATION 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
Peppertree Atlantic Beach Owners' Association, Inc.
Carteret County
FOR THE
the continued operation of a 75,000 GPD wastewater collection, treatment, and disposal facility consisting of:
a wastewater collection system consisting of approximately 1,175 linear feet of 8-inch gravity sewer, and the continu,
operation of an existing wastewater collection system; and
the continued operation of an existing 0.05 MGD dual -train extended aeration wastewater treatment plant (previously
approved as a subsurface system.) consisting of an 80 GPM dual pump influent lift station providing 5,000 gallons of
flow equalization, a 15,000 gallon flow equalization basin with 100 GPM dual pumps and one (1) blower, a manually
cleaned bar screen, a flow splitter box, dual 25,000 gallon aeration tanks with dual 120 CFM blowers, two (2) 4,167
gallon clarifiers, two (2) 2,500 gallon aerated sludge holding tanks, two (2) 15 square foot tertiary filters, dual
chlorinators with one (1) 1,345 gallon contact chamber, a 4,000 gallon effluent dosing chamber with dual 70 GPM
pumps and an on -site 45 kW emergency generator: and
the continued operation one (1) 50,000 gallon aeration basin, one (1) 7,700 gallon clarifier, one (1) 6,395 gallon
aerated sludge holding tanks, three (3) 120 CFM blowers (one for stand-by), two (2) 15 square foot tertiary filters, and
a 1,345 gallon chlorine contact chamber; and
the continued operation of a 0.075 MGD wastewater high -rate drip irrigation facility consisting of screens added to the
existing dosing chamber, a Netafim Arkal Model 40 drip irrigation control and filter unit, and all appurtenant screens,
filters, pumps and distribution lines providing a drip irrigation area of 12,600 ft2 to serve thirty-four (34) existing one -
bedroom units, eighteen (18) proposed one -bedroom units, ninety-seven (97) existing two -bedroom units, fifty-one
(51) proposed two -bedroom units, and nine (9) existing three -bedroom units in Peppertree Resorts Villas I, II, and III,
with no discharge of wastes to the surface waters, pursuant to the renewal request received March 15, 2000, 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 February 28, 2006, shall void Permit Nr
WQ0011313 issued December 19, 1996, and shall be subject to the following specified conditions and limitations:

I. PERFORMANCE STANDARDS
1. The spray irrigation facilities shall be effectively maintained and operated at all times so that there is no
discharge to the surface waters, nor any contamination of ground waters which will render them
unsatisfactory for normal use. In the event that the facilities fail to perform satisfactorily, including the
creation of nuisance conditions or failure of the irrigation area to adequately assimilate the wastewater, 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 and 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 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.
4. 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.
5. The following buffers shall be maintained:
a) 100 feet between high -rate irrigation wetted perimeter and any habitable residence or place of public
assembly under separate ownership or which is to be sold,
b) 200 feet between high -rate irrigation wetted perimeter and any private or public water supply source
and any streams classified as WS or B,
c) I00 feet from mean high water between high -rate irrigation wetted perimeter and any "SA" or "SB"
classified surface waters,
d) 50 feet from normal high water between high -rate irrigation wetted perimeter and any other stream,
canal, marsh, or coastal waters,
e) 200 feet from normal high water between high -rate irrigation wetted perimeter and any Class I or
Class II impounded reservoir used as a source of drinking water,
f) 200 feet between high -rate irrigation wetted perimeter and any other lake or impoundment,
g) 25 feet between high -rate irrigation wetted perimeter and any Drainage systems (ditches, drains,
surface water diversions, etc.) and from any groundwater lowering and surface drainage ditches,
h) 50 feet between, high -rate irrigation wetted perimeter and property lines,
i) 50 feet between treatment units and property lines, and
j) 50 feet between high -rate irrigation wetted perimeter and other treatment units and public right of
ways, and
k) 10 feet between high -rate irrigation wetted perimeter and any building foundation.
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 spray irrigation 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

6. A leakage test shall be performed on the septic tank and dosing tank to insure that any exfiltration occurs
at a rate which does not exceed twenty (20) gallons per twenty-four (24) hours per 1,000 gallons of tar' -
capacity. The engineer's certification will serve as proof of compliance with this condition.
7. 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.
S. When average daily flows reach 80% of the existing constructed wastewater treatment facility's capacity,
construction shall begin on the expansion of the proposed expansion. This expansion shall be complete
prior to wastewater flows reaching 90% of the existing constructed wastewater treatment facility's
capacity.
II. OPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee shall employ a certified
wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater treatment
facilities. The operator must hold a certificate of the type and grade at least equivalent to or greater than
the classification assigned to the wastewater treatment facilities by the Certification Commission. The
Permittee must also empIoy a certified back-up operator of the appropriate type and grade to comply with
the conditions of Title 15A, Chapter 8A, .0202. The ORC of the facility must visit the facility at least five
days a week, must properly manage and document daily operation and maintenance of the facility, and
must comply with all other conditions of Title 15A, Chapter 8A, .0202. During the period from AR
through October, inclusive, the ORC's five visits each week shall be on Monday, Wednesday, Friday,
Saturday and Sunday, including holidays.
3. 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 drip irrigation disposal area, which result from the
operation of this facility.
5. A suitable vegetative cover shall be maintained for the high -rate drip irrigation disposal area.
6. No type of wastewater other than that from Peppertree Resort Villas I , II, and III shall be distributed onto
the irrigation area.
7. If mulch is utilized on the drip irrigation area, the drip irrigation lines shall be covered with no more than 2
to 4 inches of mulch to enhance evaporation potential.
8. The drip irrigation lines shall be staked in place to prevent shifting from the designed location.
9. Adequate measures shall be taken to prevent freezing of the drip irrigation lines in cold weather.
10. Adequate measures shall be taken to divert stormwater from the high -rate drip irrigation area and to
prevent wastewater runoff.
11. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited.
12. No traffic or equipment shall be allowed on the disposal area except while installation occurs or whil
normal maintenance is being performed.

13. Public access to the land application sites shall be controlled during active site use_ Such controls may
include fences and the posting of signs showing the activities being conducted at each site. The drip
irrigation area shall be fenced as indicated on the approved plans.
14. The screenings removed from the wastewater treatment plant shall be properly disposed in a sanitary
landfill or by other means which have been approved by this Division.
15. 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.
16. The flow measurement device shall be calibrated annually by a representative of a firm that 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.
18. Diffusers shall be cleaned as needed to ensure that adequate aeration is provided. The Permittee shall
maintain records of this maintenance.
19. 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.
III. MONITORING AND REPORTING REQUIREMENTS
L Any monitoring (including groundwater, surface water, soil or plant tissue analyses) 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. As an indicator of proper operation and maintenance, the facility shall produce an effluent in
compliance with the following limitations:
Parameter Monthly Avera ea Daily Maximumb
Floes' 75,000 GPD
BOD5 (5-day, 20'Q 10 mg/1
NH3 as N 4 mg/1
TSS 20 mgll
Fecal Coliform 14 per 100 ml 43 per 100 m]
aMonthly average shall be the arithmetic mean of all samples collected during the reporting period.
bDaily maximum shall be the maximum, value of all samples collected during the reporting period.
4

The effluent from the subject facilities shall be monitored, by the Permittee, at a point prior to application
to the soil by the high -rate drip irrigation system for the following parameters:
Parameter
Sampling Point
Sampling Frf,-qurncy
Type of Sample
Flow
Influent or Effluent
Continuous
Recording
BOD5 (5-day, 20°C)
Effluent
*2/Month
Composite
NH3 as N
Effluent
*2/Month
Composite
TSS
Effluent
2/Month
Composite
Fecal Coliform
Effluent
2/Month
Grab
Settleable Matter
Effluent
Daily
Grab
Residual Chlorine
Effluent
Daily
Grab
NO3 as N
Effluent
*2/month
Grab
TDS
Effluent
**Bi-monthly
Grab
TOC
Effluent
***Triannually
Grab
Chloride
Effluent
**Bi-monthly
Grab
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
* Twice per month sampling frequency only during the months of April through October. During the
remainder of the year, these parameters shall be monitored monthly.
Bi-monthly sampling frequency beginning in February, and continuing every other month.
*** Triannually sampling shall be conducted during February, June and October.
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.
3. Three (3) copies of all effluent monitoring data (as specified in condition III 2) on Form NDMR-1 shall be
submitted on or before the last day of March, July and November. All information shall be submitted to
the following addresses:
NC Division of Water Quality
Water Quality Section
Non -Discharge Compliance and Enforcement Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
NC Division of Water Quality
Groundwater Section
Permits and Compliance Unit
1636 Mail Service Center
Raleigh, NC 27699-1636
4. 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

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; and
e. Date and results of power interruption testing on alternate power supply.
£. Noncompliance Notification:
The Permittee shall report by telephone to the Wilmington Regional Office, telephone number (910) 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 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 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.
IV. GROUNDWATER REQUIREMENTS
1. The three existing monitor wells MW-1, MW-2, and MW-3 shall be sampled every February, June and
October for the following parameters:
Water Level pH
Chloride Total Dissolved Solids (TDS)
Fecal Coliforms Total Organic Carbon (TOC)
Nitrate (NO3) Ammonia Nitrogen
Volatile Organic Compounds - In October only using one of the following:
(A) Standard Method 6230D, PQL at 0.5 ug/L or less
(B) Standard Method 6210D, PQL at 0.5 ug/L or less
(C) EPA Method 8021, Low Concentration, PQL at 0.5 ug/L or less
(D) EPA Method 8260, Low Concentration, PQL at 0.5 ug/L or less
(E) Another method with prior approval by the Groundwater Section Chief.
0

Any method used must meet the following qualifications:
(1) A laboratory must be DWQ certified to run any method used.
(2) The method used must, at a minimum, include all the constituents listed in Table VIII of
Standard Method 6230D.
(3) The method used must provided a PQL at 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 MDL but below the PQL at 0.5 ug/L must be qualified
(estimated) and reported.
2. If any volatile organic compounds are detected by the methods listed, then the Wilmington Regional
Office Groundwater Supervisor, telephone number [phone], trust be contacted inunediately for
further instructions regarding any additional follow-up analyses required. The results of all initial and
follow-up analyses must be submitted simultaneously.
3. 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.
4. The measurement of water levels must be made prior to sampling for the remaining parameters. The
depth to water in each well shall be treasured from the surveyed point on the top of the casing.
5. The results of the sampling and analysis must be received on Form GW-59 (Groundwater Quality
Monitoring: Compliance Report Form) by the Department of Environment and Natural Resources, Wa+
Quality Division, Groundwater Section, Permits and Compliance Unit, 1636 Mail Service Center Raleigt,,
N.C. 27699-1636 on or before the last working day of the month following the sampling month.
6. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall be provided.
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 (1) 250 feet from the waste disposal area, or
(2) 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 in addition to the penalty provisions applicable under General Statute 143-
215.6A(a)(1).
8. In accordance with 15A NCAC 2L, a 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 on the part of the permittee.
V. INSPECTIONS
Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to insure proper
operation of the subject facilities.

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 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 deternxtining 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 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.
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. 1n the event there is a desire for the facilities to change ownership, or there
is a name change of the Pem- ittee, 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.
4. 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.
5. 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).
6. 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.
7. 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)
which have jurisdiction, including but not limited to applicable aver buffer rules in 15A NCAC 2B .0200,
erosion and sedimentation control requirements in 15A NCAC Ch. 4 and under the Division's General
Permit NCG0100000, and any requirements pertaining to wetlands under 15A NCAC 2B .0200 and 2H
.0500.
S. A set of approved plans and specifications for the subject project must be retained by the Permittee for the
life of the project.

9. 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 limitatir
as it may deem appropriate.
Permit issued this the twelfth day of March, 2001
NORTH'C ROLINA,ENVIRONMENTAL MANAGEMENT COMMISSION
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0011313

WATER POLLUTION CONTROL SYSTEM OPERATORS
CERTIFICATION COMMISSION
CLASSIFICATION
RATING SHEET FOR WATER POLLUTION CONTROL SYSTEMS
FACILITY INFORMATION:
NAME OF FACILITY: C P P E 11-1-T, 4
MAILING ADDRESS: t�V D )rC (a,5�`f �' � rs i 11 � (_ - 2281(Q
COUNITY:
CONTACT PERSON:.'_ r �Rf�-I TELEPHONE:
PERMIT NO: _ 06 j � � 13 Check One: NC WQ �- HEALTH DP
ORC: T,,g-v t 7 D+/,,( ! L L.S TELEPHONE: (
RATING INFORMATION: (Before completing this section, please refer to Pages 2-4)
PERMITTED FLOW: 6, U %.5 MGD BNR? YES NO
CHECK CLASSIFICATION: WASTEWATER: I
. COLLECTION: 1
SPRAY IRRIGATION SUBSURFACE
PHYSICALICHEMICAL GRADE I
2 `� 3 4
2 3 4
LAND APPLICATION
GRADE II
RATED BG r V r-
REGIONAL OFFICE TELEPHONE NUMBER: &o ) 3 �XT:

Definitions
Activated Sludge - shall mean a biological wastewater treatment process in which predominantly
biodegradable polluntants in wastewater are absorbed, or adsorbed by living aerobic organisms and
bacteria.
Chemical Process - shalI mean a wastewater pollution control system process consisting -
exclusively of the addition of chemicals to treat wastewater.
1
Collection System - shalI mean a continuous connections of pipelines, conduits, pumping
stations, and other related constructions used to conduct wastewater to the water pollution
control system.
Electrodialysis 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, gravimetric 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.
Nose: Please refer to G.S. 90A-37 for additional information and definitions.

Classification of S ra Irri ation 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 Physic.al/Chernical Water Pollution Control Treatment Systems:
Grade I PhysicaUChemical: Any water pollution control system that utilizes a primarily
physical process to treat wastewater. This classification includes groundwater
remediation systems. **
Grade 1I 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 phyical/chemical 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 soiI for subsurface treatment and disposal of wastewater
and/or are required to have a certified operator under 15A NCAC 18A.1961. ***
*** Any subsurface system that hG ws Far t of it ::reattrent pro:: a water po!I c s control
systems that may be classified _dE- Rules .4 302 through of this sect-,c. ; ha'S be
subject to addional c assificat: s.

Classification of Biological Water Pollution Control Treatment Systems:
Grade I Biological WPCS
- Septic tank/sand filter 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
Iess 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 or fixed growth
process as required by the facilities 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:
5 '0. or L--ss = Grade I
to 1�,000 = Graeae .II
1 ,5 . 'D . to 50,000 = Grade _ a
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