WQ0000193_Final Permit_19950821

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
August 21, 1995
Mr. J. David Edwards, Vice President
Bald Head Island Utility Company
Post Office Box 3069
Bald Head Island, North Carolina 28461
Subject: Permit No. WQ0000193
Bald Head Island Utility Company
Wastewater Treatment Facility with Disposal
by Infiltration Lagoon
Brunswick County
Dear Mr. Edwards:
In accordance with your amendment request received April 3, 1995, we are forwarding herewith
Permit No. WQ0000193 as amended, dated August 21, 1995, to the Bald Head Island Utility Company
for the construction and operation of a new 200,000 GPD wastewater treatment facility. These permit is
being amended to allow construction of a new 200,000 GPD sequential batch reactor wastewater treatment
facility to replace the existing 50,000 GPD Central WWTP and the existing 100,000 GPD Timber Creek
WWTP. The existing 200,000 GPD wastewater disposal by infiltration lagoon will remain unchanged.
This permit shall be effective from the date of issuance until April 30, 1998, shall void Permit No.
WQ0000193 issued November 14, 1994, 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, 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, P.O. Drawer
27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this matter, please contact Mr. Michael D. Allen at [phone] ext. 547.
Sincerely, (}
oak&4'�c 0 -
le
A. Prest Howard, Jr., P.E.
cc: Brunswick County Health Department
McKim & Creed Engineers, P.A.
Wilmington Regional Office, Water Quality Section
Wilmington Regional Office, Groundwater Section
Brian Wootton, Groundwater Section, Central Office
Training and Certification Unit
Facilities Assessment Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
INFILTRATION LAGOON 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 THE
Bald Head Island Utility Company
Brunswick County
FOR THE
construction and operation of a new 700 GPM influent pump station with dual pumps, high water alarms,
new 25 kW stand-by generator and approximately 3,100 linear feet of 10 -inch force main, a 200,000 GPD
wastewater treatment facility consisting of a flow meter, a manually cleaned bar screen, flow splitter box, a
sequential batch reactor wastewater treatment facility with dual 155,000 gallon aeration and clarifier basins
with three (3) 25 HP blowers, two (2) 5 HP mixers, and three (3) 2 HP sludge pumps, a 196,400 gallon
sludge holding tank with a 30 HP aqua -jet aerator and a 2 HP transfer pump, two (2) 40 ft2 traveling
bridge filters, a 68,825 gallon post equalization and holding basin with a 2 HP mechanical floating aerator
and three (3) 3 HP transfer pumps, gas chlorination with a 13,000 gallon chlorine contact tank, and
approximately 3,000 linear feet of force main to pump the effluent to the infiltration lagoon manhole; and
the continued operation of the existing Timber Creek WWTP for use as flow equalization, approximately
827 linear feet of 8 -inch gravity sewer, an 87 GPM pump station with dual pumps, high water alarms and
approximately 4,000 linear feet of 4 -inch force main to pump wastewater from the abandoned Central
WWTP to the new influent pump station located near the Timber Creek WWTP, an existing 25 kW
generator will be relocated to the new SBR WWTP, approximately 4,000 linear feet of 6 -inch force main
not yet in service, and a 14 acre infiltration lagoon; to serve
the Bald Head Island Timber Creek Development with no discharge of wastes to the surface waters,
pursuant to the amendment request received April 3, 1995, 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 be effective from the date of issuance until April 30, 1998, shall void Permit No.
WQ0000193 issued November 14, 1994, and shall be subject to the following specified conditions and
limitations:
I. PERFORMANCE STANDARDS
Upon completion of construction and prior to operation of this permitted facility, a
certification 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. Mail the Certification to the Water Quality
Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC 27626-0535.

2. The Wilmington Regional Office, telephone number [phone], shall be notified at
least forty-eight (48) hours in advance of operation of the installed facilities so that an in-
place inspection can be made. Such notification to the 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. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective actions, including those
actions that may be required by this Division, such as the construction of additional or
replacement wastewater treatment or disposal facilities.
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 North Carolina Division of
Environmental Management.
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.
II. OPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities shall be properly maintained and operated at all times.
2. The facilities shall be effectively maintained and operated as a non -discharge system to
prevent the discharge of any wastewater outside of the infiltration lagoon, which result
from the operation of this facility.
3. 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.
4. Freeboard in the infiltration lagoon shall not be less than two (2) feet at any time.
5. 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.
6. 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.
7. Diffusers shall be cleaned as needed to ensure that adequate aeration is provided. Records
of this maintenance shall be maintained by the permittee.
8. 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,
2

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, and
g. Flood protection if the pump station is located below the 100 -year flood elevation.
9. 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 employ 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 each Class I facility at
least weekly and each Class II, III, and IV facility at least daily, excluding weekends and
holidays, and 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.
MONITORING AND REPORTING REQUIREMENTS
1. 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. As an indicator of proper operation and maintenance, the facility shall produce an effluent
in compliance with the following limitations:
Parameter Monthly Averagea Daily Maximumb
Flow 200,000 GPD
BODS (5 -day, 20°C) 10 mg/1 O
NH3 as N 4 mg/l
TSS 20 mg/l
Fecal Coliform 14 per 100 ml 43 per 100 ml
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 infiltration lagoon for the following parameters:
Parameter Sampling Point Sampling Frequency ype of Sample
Flow
Influent or Effluent
Continuous
Recording
BODS (5 -day, 20°C)
Effluent
*2/Month
Composite
NH3 as N
Effluent
*2/Month
Composite
TSS
Effluent
*2/Month
Composite
Fecal Coliform
Effluent of first pond
*2/Month
Grab
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.
** 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.
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 April, August, and December. All
information shall be submitted to the following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
Post Office Box 29535
Raleigh, N.C. 27626-0535
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;
e. Date and results of power interruption testing on alternate power supply; and
6. 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
4

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
The three (3) existing monitor wells shall be sampled every March, July, and November
for the following parameters:
NO3 Total Dissolved Solids
TOC pH
Ammonia Nitrogen Chloride
Water Level Fecal Coliforms
Total Phosphate NO2
Total Suspended Solids
Volatile Organic Compounds - In November only (by Method 1 or 2 below)
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 levels must be made prior to sampling for the remaining
parameters. 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 to
provide the relative elevation of the measuring point for each monitoring well.
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 volatile organic compounds are detected by Method 6230D, or the equivalent Method
502.2, then the Wilmington Regional Office Groundwater Supervisor, telephone number
[phone], must be contacted immediately for further instructions regarding any
additional follow-up analyses required. The results of all initial and follow-up analyses
must be submitted simultaneously.
The results of the sampling and analysis shall be sent to the Groundwater Section, Permits
and Compliance Unit, P.O. Box 29535 Raleigh, N.C. 27626-0535 on Form GW -59
[Compliance Monitoring Report Form] every April, August, and December.
2. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall
be provided.
n

3. 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).
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
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 of Environmental Management or other permitting authority, upon request.
3. Any duly authorized officer, 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 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. 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. 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 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. 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).
G

5. Failure 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(a) to 143-215.6(c).
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 twenty-first day of August, 1995
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Preston 140ward, Jr., P.E.,)Director I
Division of Unvironmental Management
By Authority of the Environmental Management Commission
Permit Number VVQ0000193

Permit No. WQ0000193
August 21, 1995
49
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
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.

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
.Name *of Facility: PALO) "E;4aD ISLe.NU C0"VANY
' • Owner or Contact Person: -S. O&Nto e',3Wb tDS I VP
Mailing Address: Ft, 'max 30<o9 t3pt_o l5uwor tic. 2t34col
County: t'�e.u�sw1cc Telephone: ("10) 4-5-7- soot,
Present Classification: New Facility ✓ Existing Facility ✓
NPDES Per. No. NC00 Nondisc. Per. No.wAomov-i'51 Health Dept. Per. No
Rated by: M1c-uacL- AL.LEN Telephone: n33-5-cg3 Date: 6/16/95
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: Grade: Telephone:
Check Classification(s): Subsurface Spray Irrigation LandApplication
Wastewater Classification: (Circle One) I II III IV Total Points: 4S
�.� �� it t� t a•' t■ '� • � �► . � t• 1 � �t Wi
• • ' I to • C IA1 . a:wu ! . . t..►
SUP.SURFACE CLASSIFICATION
(check all units that apply)
1 -septic tanks
2 -pump tanks
3. siphon or pump -dosing systems
4 sand litters
5. grease trapinterceptor
6. oil/water separators
7 subsurface treatment and disposal:
o ravity
oressure
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1.
preliminary treatment (definition no. 32 )
2-
lagoons
3.
septic tanks
4 -pump
tanks
5.
pumps
6.
sand filters
7
grease trapinlerceptor
8
oil/water separators
9.
disinfection
10.
chemical addition for
nutrient/algae control
11.
spray irrigation of wastewater
Pretreatment of wastewater In excess of these components shall be rated using the point rating
system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RES] DUALS CLASSIFICATION (Appries only to permit holder)
1. _ Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACIUTYCLASSIFICATION
The following systems shall be assigned a Class I Gassifiicalion,nu less the flow is of a significant quantity or the technology is
unusually complex, to require consideration by the Commission on a case-by-case basis: (Check it Appropriate)
1 Oil/water Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic 7ank/Sand Filler Systems consisting only of septic tanks, dosing apparatus, pumps,sand fillers, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical
treatment for algae or nutrient control, and direct discharge;
4. Closed-loop Recycle Systems;
5. Groundwater Remedialion Systems consisting only of pumps, air -stripping, carbon adsorption, disinfection and
disposal:
6. Fish farms with discharge to surface waters;
7. Water Plant sludge handling and backwash water treatment;
8. Seafood processing consisl'mg of screening and disposal.
9. Single-family discharging systems with the exception of Aerobic Treatment Units, will be classified if permitled after
July 1. 1493 or it upon inspeclion by the Division, it is found that the system is not being adequately operated or
maintained. Such systems will be notified of the classification or reclassificalion,,�y the Commission, in writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate
points)
ITEM
PDMS
(1) Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 93). __.»»– -- ---
„» •4
(2) DE:;GN FLOW OF PLANT IN gpd (rot applicable to non-conuminated 000ling waters, sludge herding
fauthies
for water publication plants, totally closed eyele systems(see definition No. 11), and facilities
consisting only of hem (4)(d) or Items (4)(d) and (11)(d))
0 20,000.
20.001 - 50,000
50.001 - 100.000.....„._._._�„............«........._..........._..»._._.....„......_„._.„_._„„..„„....._.»..._
100.001 -
250,001 - 600.000.._ __ .„ ... »„„._._�„_„ .........
500.001 - 1.000.000----
.000.000_„.»
1,000,001
1.000.001
2,000,001 (arid up) rale 1 point additforul for each 200,OD0 gpd c.&Padty up to a
maximum of » ____._»__»»._ . __ ..„..„ „
30
Design Flow (ppd)
(3) PRELIMNARYUNfTSrPROCESSFS(w
definition No.32) ^
or
(b)
Mechanical Screens, Static Screens or comminuting Devices.»»
(c)
Grit Remov___...___._...».._._-..?
al
or
(d)
Mec►tutitcal orAsrated Grit
(a)
Flow Measuring Device
or
-�
(f)
Instrumented Flow MeasunrnenL _ „ .... „ „ _. ...._„_-„--„-_-.._»
(0)
(h)
Preasrallon....... . _ __ _ �. _ �_ _.__„. „...._.__.._...._„„._..............__..._.....
Influers Flow Equalization ........... _ „.„.„. __.„._„._._.„„...._.„_..._..__......_.„._....... ._..... 1,2 j
(I)
Grease or Oil Separators - Gravity—
ravityrMechanical.........
Mechanical ........._. 3
Dissolved Air »
11)
Prechlorinatlon.... ..„...„..».„»�»„..»........_.„ ».„.„.. „.......».„» ._ ........ .»......... _._ _ „._5
(4) PRiM4RYTREATMENTI„INITSrPROCESSFS
(a)
Septic Tank (see definition No. 43)..„ __._„ »...-_-_......... _.. ..-.-..... „„„
(b)
Imhoff Tank...._.. .„ ..............._...............S
(c)
Primary Clarifisrs..._.»._......»„.................... ..... _............. ....................... _...._..............
„_5
(d)
Settling Ponds at Settling Tanks for Inorganic Non-toxic Materials (sludge handling facilities for
water purification plants, sand, gravel, stone, and other mining operations except recreational
_._ .._.
activities such as porn or gold miring)..„...».„_........_....„._....„ ..............._».. .........____.„2
(5) SECONDARY TREATMENT 11JTTS?ROCISSIS
(a)
Carbonaceous Stage
(i) Aeration•1-figh Purity Oxygen Syslem........ .»... „.... »_.._„ ....._.__....._..._..„„_.._._.
Di"used Air System ............................. ..... ...._..._...._..._.......... _........... ............ 4C.10
Mechanical Air System (fixed, floating or rotor)_..._..._. _..._..._..._..._..._..._..._..
.._...
SeparateSludge Reaeration .............. ......... .............................. _...................................
(li) Triciding Filer
HighRale .... .................................... ................... ......................................... ....... 7
StandardRate ..... ........ -.-...... _.............„............„...._.................................................5
PackedTower ................................. ... ..-..___.._......................... _............... _................
Biological Aerated Filter or Aerated
BiologicalFiler .............................. „......................................... ............ ... ........ _._..... 10
(iv) Aerated Lagoons ......................... »............ _.... _..... ».„........ _... ».... .........................
10
(v) Rotating Biological Conlactors................... .............. ..... -.-............. ._........................... 10
(vi) Sand Filters -intermittent biolopieal.„..„.„„.„...._....__.......»..._.................._.__......„..2
Recirculating biological .................„ „.„. ._......_ ..._...„..__....... _... _.... _. ...„..3
(vii) Stabilization Lagoons ....................... ......... »............................................... „. ........
(viii) Clarfer......................................................................_..............._...................„.„._....
(ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous
removal by nitrification (see definition No. 12)(Poinis for this hem have to be In
addition to Items (5)(a)(i) through (5)(a)(viii),
utilizing the extended aeration process (see delinhion No3a)...................................... _..2
utilizing other than the extended aeration process .......... _........................................
e
(x) Nutrient additions to enhance BOD removal ................................... .................................. 5
(xl) Biological Cuhure ('Super Bugs')addition................ _._................. .. ....................... _.......
(b)
Nitrogenous Stage
(i) Aeration - High Purity Oxygen System .................... .............................................
0
DiffusedAir System......................................................................................._.._..........10
Mechanical Air System (fixed• floating or rotor) ..... _..................................................
e
SeparateSludge Reaeration ............................................ ................................. ...............
(if) Trickling Fater -High Rate......„......................................................... _................................
7
StandardRate...............................................................................................................5
PackedTower................................................................................................._.............5
(iii) Biological Aerated Filter or Aerated Biological Filter ........... .......... ................. _..._.__....10
(iv) Rotating Biological Coniaaors..................................................... ................................ 10
(v) Sand FL•er. interminent biological ..................
2
Recirculatingbiological....................................................................................................3
(vi) CIA -Ker ..........................................................................................................................5
(6) TERTiARYORADVANCED TREATMENT UNITSrPROCESSES
(a)
Activated Carbon Beds.
without carbon regeneration...................................................................................................5
withcarbon rageneration.......................................................................................................15
(b)
Powdered or Granular Acir�ated Carton Food -
without carbon regeneration..................................................................................................5
withcarbon regeneration.....................................................................................................1 5
(c)
Air stripping.............................................................................................................................................5
(d)
Denitrification Process..............................................................................................................................10

............
(1 1) MISCELIANEOJS U617SrPROCESSES «.«_._ _._._ »._.».«.....«._. ....». ._._...».».5
(a) Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes
from mining operations containing nitrogen or phosphorus compounds In amounts significantly
greater than is common for domestic wastewater ....... .....................................
� ....._.«.... .......»»......t
(b) Edlifent Flow Equalization (not applicable to storage basins which an Inherent In land application
systems) ...... _......................................._.............................................................._........_................... .2
(c) Stage Discharge (not applicable to storage basirs Inherent In lard application systems) -------------------
(d) Pumps .......................... ........................... ................................ ...... «.............................. .................... .3
(e) Stand -By Power Supply .................. _............ ........... »...... »......... ... »....«......... _._................................. .
(I) Thermal Pollution Control Device ........................................................«...»............._..................................
TOTAL POINTS ...............�».......«_. ... .. _..«_._ »...._... Q
SSF}
Q,AATiCN (�
I...................... ............ .......... ........... ......._._......._«....«...._..5.25 Points
ClassII....._ .« .. ................_ «_._............«»............................................ 6.50 Point
....»....«...._......_....«........................................................................ rets
ClassN ......... _............... ............................. ........ .................................... 66 -Up Points
Facitiiies having a rating of one through four points. Inclusive, do not require a certified operator.
Facilities having an aciivaied sludge process wit be assigned a minimum classification of Cls" It.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class III.
.0001 DEFINITIONS
The lolio.wing ciefiriions shall apply evoughoul this Subchapter.
(1) Artvarad Cs Aon Bads. A phyticalicherricol mal for reoicing soluble Will molenai atm wastewater elevens. The colurmype beds used in this rral ill have
a Ilow rats varying from hilt to eight gallons per minute per aq.+are bo; and may be liner uplow of down6ow carbon beds. Carbon may or may not be rotgerteraled on ee
waslawater vaemen: plant site:
(2) Aeral*e la;oons. A basin in which all solids are maintained it suspension and by which biWogical oxidation or organic matter is reduced through artificially accelerated
usnsle: of oxygen on a flow-through basis:
(31 Aral,on A process of bringing abo✓ intmais Contact ba Msen car or hgh puny oxygen in a lit}nd by spraying, aytaticn or diflusionl3s) Exlenclad Aeration. An
betvated sludge process sAGzing a trinmi m hydraulic deten►on time of 16 hours.
(1) AgncJl�a'i) managed site. Any site on ill a crop is Produced, managed, and hanealed (Crop Includes grasses, ii tees. ek.):
(5) Air Slnppirng A process by wil not ammonium ion is list convened to drsso'ved ammonia LW. adjustment) with the ammoris ton released to this atmosphere by
physical meas. or car S a:a• pocessex welch amore petdsum products such as bl toluene. end spell
(6) Cabo- Ragenrason The regenerabon of exhausted carbon by M use of a luhace to pride littlm iy high temperatures which volablil and oxidize to absorbed
impvmes:
(7) CaAonaccous Stage A stage of wastewater teatmem designed to achieve 'secondary- efeuent Yetis:
(E; t.entir�ge A mechtaniu' oevice in wNch centrifugal lorce is used to separate soi.os from fipids or to separate liquids of diBcent densities:
(s) Cnamrca, Add,o,, Systems The addition of cho-CIRs) to avastewar a: an app,calion pdn, for Wposes o: impo.ing solids removal, pH rdjustro n; alkalinity cenuol,
ear ,tax u,abnq• to sspsnmen: win danaeni chemicals and different sp lcabon points to achieve a specific rescan wit be considered one system, the capability to add
(e)
Etearodiatys)s.._.._.-..-_._
...__..._.........5
(1)
Foam Separatlon_____»_.
(g)
ton
(h)
Land Application of Treated Effluent (see definition No. 22b) (rot applicable for Sand.
gravel, store and other similar mining operations) by high rat
(11
Microscreens........... ................ .........._»
(J J
Phosphorous Removal by Biological Processes (Sale definition No. 26) _ ._ _ _.____
» _».. 20
(k)
Polishing Ponds - without aerallon...._
with
(1)
Post Aeration - cascade.........— _ «_
__..».D
&used or
(m)
Reverse Osmosis ...... _..»....»...
(n)
Sand or Mixed -Media Filters - low rate._..._..._
high rale
(o)
Treatment processes for removal of metal or cyanide.....
(p)
In atment processes for removal of toxic materials other than metal or cyanide—
(7)
SLLAGETREATMENi
(a)
Sludge D' n Tank . Heated. _ _._ ...._ _
Aerobic
_.»_ _— -_ .. _t 0
Unheated
(b)
Sludge Stabilization (chemical orthermal) _�.»�_
(c)
Sludge Drying Beds -
Vacuum
(d)
Sludge Elutriation... .... _.«....... ...... ........
(e)
Sludge Conditioner (chemical or thermal)
(1)
Sludge Thickener (gravity)..._ .............»
(g)
Dissolved Air Flotation Unit (rot applicable to a unk rated as
(h)
(1)
Sludge Gas Utilization (including gas storage)._...
Sludge Holding Tank - Aerated.. _«»«
Nonaerated..». »«.........._.«.«.«.......... ...... _.... ...»....»......«.«.... ._ _..._. �._
_._._............._..�'
(J)
Sludge incinerator (not including activated carbon regeneration) ............ .... ....« _.«._» .»....._..._.10
(k)
Vacuum Fher. Centrifuge, or Finer Press or other similar dewatering 0
(6)
RESIDUALS UTILI ATIOWDISPOSAL (including incinerated ash)
(a)
Lagoons_.. _._._ _.«.... _..._.....»_.._..«._.
2
(b)
Lard Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land
application permh or landfill permit ........................ ........... ......... ............ ....... ».».
/'�
» ..................(2 )
(c)
Dedicated Landlill (burial) by the permhtee of the wastewater treatment fact'ny_....._._.�.�................. .
(9)
DSrJ:ECiYN
(a)
(b)
Dechlorination ...........................
(c)
Ozone...».» �...»......«.__»� _. �. «........._....«.» ...«........---- --------- ----------- --.».5
(d)
Radiation .............. ... _............... _............................................. ... »....................................
.......... ...5
(10)
CHEMICAL ADDITION SYSTEM(S) (sea definition W. 0) (not applicable to chemical additions rated as hem
(3)0). (5)(a)!xi).
(6)(a), (6)(b). (7)(b). (7)(8). (9a). (9)(b) or (9)(c) 5 points each:
List..........
.............. _•—•-.......... ............... ....... ........ ............ ..................................5
..... ...... .......................... .....................................................
..............................
............
(1 1) MISCELIANEOJS U617SrPROCESSES «.«_._ _._._ »._.».«.....«._. ....». ._._...».».5
(a) Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes
from mining operations containing nitrogen or phosphorus compounds In amounts significantly
greater than is common for domestic wastewater ....... .....................................
� ....._.«.... .......»»......t
(b) Edlifent Flow Equalization (not applicable to storage basins which an Inherent In land application
systems) ...... _......................................._.............................................................._........_................... .2
(c) Stage Discharge (not applicable to storage basirs Inherent In lard application systems) -------------------
(d) Pumps .......................... ........................... ................................ ...... «.............................. .................... .3
(e) Stand -By Power Supply .................. _............ ........... »...... »......... ... »....«......... _._................................. .
(I) Thermal Pollution Control Device ........................................................«...»............._..................................
TOTAL POINTS ...............�».......«_. ... .. _..«_._ »...._... Q
SSF}
Q,AATiCN (�
I...................... ............ .......... ........... ......._._......._«....«...._..5.25 Points
ClassII....._ .« .. ................_ «_._............«»............................................ 6.50 Point
....»....«...._......_....«........................................................................ rets
ClassN ......... _............... ............................. ........ .................................... 66 -Up Points
Facitiiies having a rating of one through four points. Inclusive, do not require a certified operator.
Facilities having an aciivaied sludge process wit be assigned a minimum classification of Cls" It.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class III.
.0001 DEFINITIONS
The lolio.wing ciefiriions shall apply evoughoul this Subchapter.
(1) Artvarad Cs Aon Bads. A phyticalicherricol mal for reoicing soluble Will molenai atm wastewater elevens. The colurmype beds used in this rral ill have
a Ilow rats varying from hilt to eight gallons per minute per aq.+are bo; and may be liner uplow of down6ow carbon beds. Carbon may or may not be rotgerteraled on ee
waslawater vaemen: plant site:
(2) Aeral*e la;oons. A basin in which all solids are maintained it suspension and by which biWogical oxidation or organic matter is reduced through artificially accelerated
usnsle: of oxygen on a flow-through basis:
(31 Aral,on A process of bringing abo✓ intmais Contact ba Msen car or hgh puny oxygen in a lit}nd by spraying, aytaticn or diflusionl3s) Exlenclad Aeration. An
betvated sludge process sAGzing a trinmi m hydraulic deten►on time of 16 hours.
(1) AgncJl�a'i) managed site. Any site on ill a crop is Produced, managed, and hanealed (Crop Includes grasses, ii tees. ek.):
(5) Air Slnppirng A process by wil not ammonium ion is list convened to drsso'ved ammonia LW. adjustment) with the ammoris ton released to this atmosphere by
physical meas. or car S a:a• pocessex welch amore petdsum products such as bl toluene. end spell
(6) Cabo- Ragenrason The regenerabon of exhausted carbon by M use of a luhace to pride littlm iy high temperatures which volablil and oxidize to absorbed
impvmes:
(7) CaAonaccous Stage A stage of wastewater teatmem designed to achieve 'secondary- efeuent Yetis:
(E; t.entir�ge A mechtaniu' oevice in wNch centrifugal lorce is used to separate soi.os from fipids or to separate liquids of diBcent densities:
(s) Cnamrca, Add,o,, Systems The addition of cho-CIRs) to avastewar a: an app,calion pdn, for Wposes o: impo.ing solids removal, pH rdjustro n; alkalinity cenuol,
ear ,tax u,abnq• to sspsnmen: win danaeni chemicals and different sp lcabon points to achieve a specific rescan wit be considered one system, the capability to add

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
J. Chris Ford, P.E., Project Manager
McKim & Creed Engineers
243 Front Street
Wilmington, NC 28401
Dear Mr. Ford:
March 24, 1998
D E N R
WQ0000193 ?t�a5t FMS a �ooc5
�1T
r A I S .
RE: Bald Head Island Utilities
Flow Reduction Request
Brunswick County
The Division of Water Quality has completed a review of your request for a per unit flow
reduction for all connections located in the Bald Head Island Utilities jurisdiction. Your flow
reduction request included water usage records from the commercial establishments and the
wastewater influent flow rates at the wastewater treatment facility (Permit No. WQ0000193) on
Bald Head Island. The Non -Discharge Permit Unit with help from the Wilmington Regional
Office, Water Quality Section reviewed the submitted information in accordance with 15A
NCAC 2H .0219 regulations and offers the following response.
The documentation provided in support of the flow reduction request was compiled by
McKim & Creed Engineers. Data submitted to the Division was not in strict accordance with
15A NCAC .0219(1)(3) which requires water use records, however, in view of the submitted
documentation, adequate justification was provided in support of the data submitted for the
wastewater flow reduction request. The work completed by McKim & Creed Engineers
determined the rate by using the flow to the treatment facility (determined by influent flow
records) and removed flows (determined by water use records) from the commercial
establishments connected to the system. This determined the appropriate flow per dwelling unit
for the single family residential area. The Division calculated the adjusted flow by using 15A
NCAC .0219(1)(3) which required location of the highest 10% of daily flows in the month with
the highest average flow for the year. This highest 10% was determined from the submitted data
to be the days of August 2nd, 9th and 11th in the year 1997. The average flow of these three
days was 0.1243 MGD. Subtracting the commercial daily flow for the month of August, 1997
(22,751 GPD) then dividing by the number of connected homes (332 homes) the flow was
calculated to be 305.8 GPD.
In view of the information submitted, the Division of Water Quality will approve the use
of 305 GPD per dwelling unit for single family residential areas on all applicable non -discharge
permit applications for future wastewater collection extensions which will be made tributary to
the Bald Head Island Utility's wastewater treatment facilities. This consideration applies to any
applicable future projects submitted to this Division. Wastewater flows presently tributary to the
wastewater treatment facilities can be adjusted upon negotiations between Bald Head Island
Utilities and the Division's Wilmington Regional Office.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

If you have any questions or comments on this matter, please contact Mr. Randy Kepler
at [phone] extension 544. O
Sincer
Mr. Kim Colson, Supervisor
Non Discharge Permitting Unit
cc: Wilmington Regional Office, Water Quality
Ms. Lisa Martin, Local Government Assistance Unit
Mr. Ken Bowing, Bald Head Island Utilities
Permit File WQ0000193
E