NC0085863_Permit Issuance_19990623

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
June 23, 1999
Mr. Jerry Tweed
Heater Utilities, Inc.
202 MacKenan Court
Cary, North Carolina 27519
A
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Issuance of NPDES Perrrdt NCO085863
Waterfall Plantation WTP
Wake County
Dear Mr. Tweed:
In accordance your request for an NPDES permit renewal received on September 10. 1997. the Division is
forwarding herewith the subject NPDES permit. This permit is issued pursuant to the requirements of North
Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the US
Environmental Protection Agency dated December 6, 1983.
The following changes (which orginally appeared in the draft permit) appear in the final permit:
• The cover page and the supplement to permit cover page were both updated to reflect the correct
receiving stream, treatment units, and permittee name.
• Iron and Total Residual Chlorine monitoring requirements were added per Division policy for Water
Treatment Plants.
Total Nitrogen and Total Phosphorus monitoring were added per the Neuse River Basin Strategy.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days
following receipt of this letter. 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, Post Office Drawer
27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this decision shall be final and
binding.
Please take notice that this permit is not transferable except after notice to the Division of Water Quality.
Contact Division personnel in case of any change in ownership or control of this discharge. The Division of Water
Quality may require modification or revocation and reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area Management
Act or any other Federal or Local governmental permit that may be required. If you have any questions
concerning this permit, please contact Charles Weaver at telephone number [phone], extension 511.
O g"WSigned By
David A. Goodrich
Kerr T. Stevens
cc: Central Files
Mr. Roosevelt Childress / EPA
Raleigh Regional Office / Water Quality Section
NPDES Unit
Point Source Compliance Enforcement Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
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Permit NCO085863
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina
Environmental Management Commission, and the Federal Water Pollution Control Act, as
amended,
Heater Utilities, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Waterfall Plantation Subdivision WTP
NCSR 1923
Wake Forest
Wake County
to receiving waters designated as Horse Creek in the Neuse River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III, and IV hereof.
This permit shall become effective August 1, 1999.
This permit and authorization to discharge shall expire at midnight on January 31, 2003.
Signed this day June 22, 1999.
Original Signed By
David A. Goodrich
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO085863
SUPPLEMENT TO PERMIT COVER SHEET
Heater Utilities, Inc.
is hereby authorized to:
1. Continue to operate a settling system for filter backwash water which
includes the following components:
• 400-ft2 backwash sand filter
This facility is located at Waterfall Plantation Subdivision WTP on NCSR
1923 (near Wake Forest) in Wake County.
2. Discharge from said treatment works at the location specified on the
attached map into Horse Creek which is classified WS-IV NSW waters in the
Neuse River Basin.

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Latitude: 35°58' 49'
Longitude: 78'33' 15"
Quad>< D24NE
Receiving Stmam Norse Ceek
Stream Cass: Wsry NSW
Subba 3WI
NCO085863
Heater Utilities
Waterfall Plantation WTP
Facility'
Location
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SCALE 1 :24000

Permit NC0085863
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
FINAL
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored
by the Permittee as specified below:
._ L.
�1K,*
W
_T`+p�I.L�*.�/;/�
))��:.
1
■M■Jr
F�jre4•1�„^"F"�..r
Flow
WeeklyInstantaneous
Effluent
Total Suspended Solids
30.0 m
45.0 m
2/Month
Grab
Effluent
Settleable Solids
0.1 mVl
0.2 mVl
WeeklyGrab
Effluent
Turbid'
2
2
WeeklyGrab
Upstream & Downstream
Total Nitrogen
(NO2 + NO3 + TKN)3
NL m L
Monthi 3
Grab
Effluent
NL (lb/month)
Monthiy3
Calculated
Effluent
NL (lb/year
Annuall 3
Calculated
Effluent
Total Phosphorus
Month
Grab
Effluent
Iron
Weekly
Grab
Effluent
Total Residual Chlorine
Week
Grab
Effluent
Notes:
i Sample locations: Upstream = at least 100 feet upstream from the outfall; Downstream = at least
100 feet downstream from the outfall.
2 The effluent shall not cause the turbidity of the receiving stream to exceed 50 NTU. If the turbidity
exceeds these levels due to natural background conditions, the effluent cannot cause any increase
in the turbidity in the receiving stream.
s NL = No Limit. See Condition A. (2.) Total Nitrogen Monitoring.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) TOTAL NITROGEN MONITORING
The Permittee shall calculate annual total nitrogen mass loading as the sum of quarterly loadings,
according to the following equations:
(1) Monthly Loading (lb) = Days x TN x Qw x 8.34
where:
Days = the number of discharge days in that month
TN = the average total nitrogen concentration (mg/1) of the grab samples collected during
the month
Qw = the average daily waste flow (MGD) for the month
8.34 = conversion factor, from (mg/1 x MGD) to pounds
The annual mass loading is the sum of the monthly loadings:
(2) Annual Mass Loading (lb/yr)= E (Monthly Loadings) for the calendar year
The Permittee shall report the total nitrogen concentration for each sample and the monthly mass
loading in the appropriate monthly self -monitoring report. The annual total nitrogen mass loading
shall be reported in the self -monitoring report for December of each year.

•`
rnrlwl
A
•
NCDENW.,
JAMES B. HUNT.i
C+fP
OVERNOR
• VIfAYNB MCDEVITTf �.
SECRETARY t .,
3 MA G'Sff A
}:
i 1F
P �. .,.•eae•
/ a 6—
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL HEALTH
PUBLIC WATER SUPPLY
MEMORANDUM
TO: David Goodrich
Discharge Permits Unit
co
Division of Environmental Management rn
-10
FROM: Linda Sewall
t,Q
Division Dire or
Division of Environmental Health 3
N
DATE: September 17, 1998 -,
SUBJECT: Draft National Pollutant Discharge
Elimination System Permit #NC0085863
Waterfall Plantation Subdivision Water Treatment Facility
Wake Forest, Wake County
Reference is made to the above mentioned Draft National Pollutant
Discharge Elimination System Permit. We have reviewed this permit
application and determined that the proposed discharge will not be
sufficiently close to any existing or known proposed public water supply
intake so as to create an adverse effect on water quality.
We concur with the issuance of this permit provided the facility is
operated and maintained properly, the stated effluent limits are met prior to
discharge, and the discharge does not contravene the designated water
quality standards.
If we can be of further assistance, please contact us.
LS/MLD/ncp
cc: J. Wayne Munden
3800 BARRETT DRIVE, SUITE 101, RALEIGH, NORTH CAROLINA 27609
PHONE [phone] FAX [phone]
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NCDENR
JAMES B. HUNTJR.
GOVERNOR
WAYNE MCDEVITT
SECRETARY
LIMA CSEWALL
DIRECTOR
�Ut
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL HEALTH
PUBLIC WATER SUPPLY
MEMORANDUM
TO: David Goodrich
Discharge Permits Unit
Division of Environmental Management
FROM: Linda Sewall i
Division Director
Division of Environmental Health
DATE: August 10, 1998
SUBJECT: Draft National Pollutant Discharge
Elimination System Permit #NC0085863
Waterfall Plantation Subdivision Water Treatment Facility
NCSR 1923, Wake Forest
Wake County
Reference is made to the above mentioned Draft National Pollutant
Discharge Elimination System Permit. We have reviewed this permit
application and determined that the proposed discharge will not be
sufficiently close to any existing or known proposed public water supply
intake so as to create an adverse effect on water quality.
We concur with the issuance of this permit provided the facility is
operated and maintained properly, the stated effluent limits are met prior to
discharge, and the discharge does not contravene the designated water
quality standards.
,r
If we can be of further assistance, please contact us.
LS/MLD/ncp
cc: J. Wayne Munden
k. 9800 BARRETT DRIVE, SUITE 101, RALEIGH, NORTH CAROLINA 27609
PHONE [phone] FAX[phone]
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To: Permits and Engineering Unit
Water Quality Section
Attention: Mary Cabe
Date 12/1/97
NPDES STAFF REPORT AND RECOMMENDATION
County WAKE
Permit No. NC0085863
PART I - GENERAL INFORMATION
1. Facility and Address: Waterfall Plantation Subdivision
Mica Mine Rd., in Thompson Mill Subdivision
NCSR 1923
Wake Forest, Wake County
Applicant Mailing Address: Mr. Jerry Tweed (Contact Person)
Heater Utilities, Inc.
202 MacKenan Court
Cary, NC 27519
2. Date of Investigation:10/10/97 (Site inspection)
3. Report Prepared by: Jarwin Hester
4. Persons Contacted and Telephone Number: Jerry Tweed 467-7854
5. Directions to Site: Take U.S. 50 north to Hwy.98. Go west approximately 1-2 miles to
NCSR 1923 (Thompson Mill Rd.) and turn right. Proceed
approximately 1 mile to Thompson Mill Subdivision, and turn right
onto Mica Mill Rd. Go to the end of the road and the well is at the
end of the cul-de-sac.
6. Discharge Point(s), List for all discharge points:
Latitude: 35058149"N Longitude:78'33'15"W
Attach a USGS map extract and indicate treatment facility site and discharge point on
map.
U.S.G.S. Quad No. D 24 NE _ U.S.G.S. Quad Name. Wake Forest, NC

SOC PRIORITY PROJECT: Yes -
No -If Yes, SOC No.
7. Site size and expansion area consistent with application ?
xx_ Yes No If No, explain:
8. Topography (relationship to flood plain included):
The area around the site is relatively flat. There are 10 foot bluffs on both sides of the
creek. The creek is about 20 feet wide.
9. Location of nearest dwelling: Approximately > 200 feet from well head
10. Receiving stream or affected surface waters:
Horse Creek Index Number:27-17-(2)
a. Classification: WS-IV NSW
b. River Basin and Sub basin No.: 03:04:01
C. Describe receiving stream features and pertinent downstream uses:
Flows into the Falls Lake Reservoir.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewaterto be permitted: 6100 GPD
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste Water Treatment facility? N/A
C. Actual treatment capacity of the current facility (current design capacity)? N/A
d. Date(s) and construction activities allowed by previous
Authorization to Construct issued in the previous two years:
The system was constructed in 1996.
e. Please provide a description of existing or substantially constructed wastewater
tr tmentfacilities:
A 00 + square foot sand filter to treat backwash from water treatment. Well
water will be treated with potassium permanganate to control iron and
manganese.
f. Please provide a description of proposed wastewatertreatment facilities:
g. Possible toxic impacts to surface waters: none noted.
h. Pretreatment Program (POTWs only):

SOC PRIORITY PROJECT: Yes —No —
If Yes, SOC No.
in development approved
should be required not needed
2. Residuals handling and utilization/disposalscheme:
a. If residuals are being land applied, please specify DEM permit no. Other
disposal/utilizationscheme .(Specify) As necessary by approved hauler.
Residual Contractor:
Telephone No. :
b. Residuals stabilization:
PFRP Other
C. Landfill: Used filter media to landfill.
d. Other disposal/utilizationscheme (Specify)
3. Treatment plant classification (attach completed rating sheet):Class I
4. SIC Code(s):49 y�
5. Wastewater Code(s) of actual wastewater, not particular facilities i.e.., non -contact cooling
water discharge from a metal plating company would be 14, not 56.
Primary 04 Secondary _ _ _ _
Main Treatment Unit Code: 440-7
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public moneys
involved. (municipals only)? No
2. Special monitoring or limitations (including toxicity) requests: Residual Chlorine
3. Other Special Items: Facility could pose a possible toxic impact to the surface waters
from the chlorine and potassium permanganate residuals.
4. Important SOC, JOC or Compliance Schedule dates: (Please indicate)
Date

• • _ SOC PRIORITY PROJECT: Yes No
If Yes, SOC No.
Submission of Plans and Specifications
Begin Construction
Complete Construction
5. Alternative Analysis Evaluation: Has the facility evaluated all of the non -discharge options
available. Please provide regional perspective for each option evaluated.
Spray Irrigation: N/A
Connection to Regional Sewer System: N/A
Subsurface: Soils not suitable
Other disposal options: N/A
PART IV - EVALUATION AND RECOMMENDATIONS
The existing well water treatment facility should have no significant impact to the creek.
The RRO, along with Wake County Health Department of Health, recommends approval of the
permit appli tion.
Signature of repo p parer
'th 4tvl�
Water Quality Regional Supervisor
Date (-'Zl l 1q

RATING SCALE FOR CLASSIFICATION OF
Name o a�`w
f Facility: _ ,
Owner or Contact Person:
WATER POLLUTION CONTROL SYSTEMS
gu-�,a,n
Mailing Address: oG0 C t'•O• b 4 WK 275'1
County: _ W44- Telephone: (011q) -?*sit
Present Classification: New Facility Existing Facility ✓
NPDES Per. No..NC00-9-SA,6Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: 6AAA)t J s4e4 Telephone: Date: 101VII
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central OfficeTelephone:
O' • • •
Classification:Check Classification (s): Subsurf e Spray Irrigation Land Application
Wastewater (Circle • - • P• i
r : ►1 PROCESSES AND RELATED \ I l:OEQUIPMENT WHICH ARS AN NMGRAL PARTOF INDUSTRIALPRODUCTION SHALL NOT BE
CONSIDEBEOWMIETR _ lu ENT FO: 1.1 t : ��� �� _'� 7..: 1.!► �:/1� :.►:. yNyl-��. ��►..�71►.. �►: �. J1. :►.
SUBSURFACE CLASSIFICATION
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease trap/interceptor
6.- oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1._
preliminary treatment (definition no. 32 }
2.
Iagoons
3.
septic tanks
4.
pump tanks
5.
pumps
6.
sand filters
7.
grease trapinterceptor
8.
oil/water separators
9.__disinfection
10.
chemical addition for nutrient/algae control
11.
spray Irrigation of wastewater
In addition to the above classifications, 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/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless 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 If Appropriate)
1. OiVwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus. pumps,sand filters, 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 Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposrJ;
6.--�uquacufture operations with discharge to surface waters;
7. �//Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
9. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified If permitted after July 1,
1993 or if upon Inspection 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 reclassification by the Commission, In writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
ITEM POINTS
(1) Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 33)...................................................4
(2) DESIGN FLOW OF PLANT IN gpd [not applicable to non -contaminated cooling waters, sludge handling facilities for
water purification plants, totally dosed cycle systems(see definition No. 11). and facilities consisting only of hem
(4)(d) or Items (4)(d) and (11)(d))
0 - 20.000.............................. .............:............................................................ ............................. ......... (! J
20.001 - 50.000......................................................................................................................................2
50,001 - 100.000... ....................................................................... .......................... ................................3
100.001 - 250.000..................................................................................................................................A
250.001 - 500.000...................................................................................................................................5
600.001 - 1.000.000.................................................................................................................................8
1.000,001 - 2.000.000..........................................................................:................................................10
2.000.001 (and up) rate 1. point additional for each 200.000 gpd capacity up to a maximum of .................30
Design Flow (gpd) '
(3) PRELIMINARY
UNffSIPROCESSES (see definklon No.32)
(a)
Bar Screens...............................................................................................................................................I
or
(b)
Mechanical Screens. Static Screens or Comminuting Devices..........................................................................2
(c)
Grit Removal........................................................................................................................................
or
(d)
Mechanical or Aerated Grit Removal.............................................................................................................2
(a)
Flow Measuring Device................................................................................................................................1
or
(f)
Instrumented Flow Measurement................................................................................................................2
(9)
Preaeratlon...............................................................................................................................................2
(h)
Influent Flow Equalization..........................................................................................................................2
(1)
Grease or Oil Separators Gravity.................................................................................................................2
Mechanical................................................................................................................................................3
DissolvedAir Flotation................................................................................................................................8
(1)
Prechlodnatlon.........................................................................................................................................5
(4) PRIMARY TREATMENT UNiTSiPROCESSES
(a) Septic Tank (see definition No. 43)........................................................................................................
(b)
Imhoff Tank..............................................................................................................................................5
(c)
Primary Clarifiers..........................................................................................................................................5
(d)
Settling Ponds or Settling Tanks for Inorganic Nontoxic Materials (sludge handling facilities for water
purification plants, sand. gravel. stone, and other mining operations except recreational activities such as gem
orgold mining)........................................................................................................................................2
(5) SECONDARY TREATMENT LINT TWPROCESSES
(a)
Carbonaceous Stage
(i) Aeration -High Purity Oxygen System..............................................................................20
DiffusedAir System.......................................................................................................10
MechanicalAir System (fixed. floating or rotor)..................................................................8
SeparateSludge Reaerallon............................................................................................3
(11) Trilling Ffter
HighRate.......................................................................................................................7
StandardRate...............................................................................................................5
PackedTower.................................................................................................................5
(111) Biological Aerated Filler or Aerated Biological Fifter............................................................10
(Iv) Aerated Lagoons..........................................................................................................10
(v) Rotating Biological Contactors......................................................................................10
(vi) Sand Filters -Intermittent biological..................................................................................2
Recirculatingbiological....................................................................................................3
(vlk) Stabilization Lagoons....................................................................................................5
(vill) Clarifier...........................................................................................................................6
(ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrification (see definition No. 12)(Points for this hem have to be In addition to hems
(5)(a)(1) through (5)(a)(viil).
utilizing the extended aeration process (see definition No.3a)...........................................2
utilizing other than the extended aeration process............................................................8
(x) Nutdord additions to enhance BOD removal.....................................................................5
(xl) Biological Culture (Super Bugs')addition........................................................................5
(b)
Nitrogenous Stage
(1) Aeration - High Purty Oxygen System ........................ ........... ».......... .................. .......... 0
DiffusedAir System.......................................................................................................10
Mechanical Air System (fixed. floating or rotor) ............................. ................................. 8
SeparateSludge Reaerallon............................................................................................3
(11) Trickling Filter -High Rate...................................................................................................7
StandardRate................................................................................................................6
PackedTower................................................................................................................5
(i11) Biological Aerated Filter or Aerated Biological Filter .............................................................10
(Iv) Rotating Biological Contactors......................................................................................10
(v) Sand Filter - Intermittent biological..................................................................................2
Recirculatingbiological....................................................................................................3
(VI) Clarifier..........................................................................................................................5
(6) TERTIARY OR ADVANCED TREATMENT UNITSIPROCESSES
(a)
Activated Carbon Beds -
whhoutcarbon regeneration....................................................................................................5
withcarbon regeneration............................................................................................15
(b)
Powdered or Granular Activated Carbon Feed -
withoutcarbon regeneration.................................................................................................5
whhcarbon regeneration.....................................................................................................15
(c)
Air stripping........................................................................................................................................5
(d)
Denhrffkation Process..............................................................................................................................10
(a)
Electrodlalysis............................................................................................................................................5
(f)
Foam Separation.......................................................................................................................................5
(9)
Ion Exchange............................................................................................................................................5
(h)
Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel. stone
and other similar mining operations) by high rate Infihration................._........»... »... »............... ... ...... ........ A
(1)
Microscreens..............................................................................................................................................5
(1)
Phosphorous Removal by Biological Processes (See definition No. 26)........................................................20
(k)
Polishing Ponds - without aeration............................................................................................................2
withaeration.................................................................................................................5

PostAeration - cascade ............... ...................................... ...............................................................2
diffusedor mechanical......................................
(m)
Reverse Osmosis........................................................................................................... 5
�-
(n)
Sand or Mixed -Media Filters low rate........................................................................................................2
(o)
highrate..................................................................
Treatment for
processes removal of metal or cyanide. ..........................................1
........................................
(p)
treatment processes for removal of toxic materials other than metal or cyanide..............................................15
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank - Heated (anaerobic)...............................................................................................10
Aerobic..................................................................................................... ..5
Unheated (anaerobic) .... ........................................................................................................3
(b)
Sludge Stabilization(chemical or thermal) ............................................................................................5
(c)
Sludge Drying Beds - Gravity......................................................................................................................2
VacuumAssisted..................................................................5
.....................................................................
(d)
Sludge Elutriation.....................................................................................................................................5
(a)
Sludge Conditioner (chemical or thermal)...................................................................................................5
(f )
Sludge Thickener (gravity)...................................................... ..................................................................5
(g)
Dissolved Air Flotation Unit [not applicable to a unit rated as (3)(1)).............................................................a
(h)
Sludge Gas Utilization (including gas storage).............................................................................................2
(I)
Sludge Holding Tank - Aerated...................................................................................................................5
Non-aerated.............................................................................................................................................2
(J)
Sludge Incinerator (not includ€ng actvated carbon regeneration)................................................................10
(k)
Vacuum Filter, Centrifuge, or Filter Press or other similar dewatering devices...................................................10
(8)
RESIDUALS UTILIZATION/DISPOSAL (including incinerated ash)
(a)
Lagoons......................... ..................... .. ..........................................................................2
.....................
(b)
Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
orlandfill permit........................................................................................................................................2
W
Dedicated Landfill(burial) by the permittee of the wastewater treatment facility ...............................................
(9)
DISINFECTION
(a)
Chlorination.............................................................................................................................................5
(b)
Dechlodnation..........................................................................................................................................5
(c)
Ozone.......................................................................................................................................................5
(d)
Radiation......................................................:...........................................................................................5
(10)
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [not applicable to chemical additions rated as hem (3)0).
(5)(a)(A).
(6)(a), (6)(b). (7)(b). (7)(e). (9a). (9)(b) or (9)(c) 5 points each:
List....................................................................................................................................5
.....................................................................................................................................5
.................................................................................................................................... 5
..........................................................................................................................5
(11)
i
MISCELLANEOUS UNi WROCESSES.
(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
fordomestic wastewater............................................................................................................................4
(b)
Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems).....2
(c)
Stage Discharge (not applicable to storage basins Inherent in land application systems)..................................6
(d)
Pumps.....................................................................................................................................................3
(8)
Stand -By Power Supply.............................................................................................................................3
(f)
Thermal Pollution Control Device............................................................. :................................................... 3
TOTAL POINTS..........................................................................
r
ClassI...........................................................................................................5-26 Points
Class 11.........................................................................................................26-50 Points
CIMS111........................................................................................................61-65 Points
ClassIV....................................................................................................... 68-Up Points
-------------------------------------------------------------
Facilities having a rating of one through four points, inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class 11.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class III.
MUDEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physicaVchemical method for reducing soluble organic material from wastewater effluent; The cotumn-type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upfiow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained In suspension and by which biological oxidation or organic matter Is reduced through artificially
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen in a liquid by spraying, agitation or diffuslon;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours.
(4) Agriculturally managed site. Any site on which a crop Is produced. managed. and harvested (Crop Includes grasses. grains. trees. etc.);
(5) Air Stripping. A process by which the ammonium ion Is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene. and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize the
absorbed Impurities;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent limhs;
(8) Centrifuge. A mechanical device to which centrifugal force Is used to separate solids from liquids or to separate liquids of different denstdas;
(9) Chemical Addition Systems- The additlon of chemical(s) to wastewater at an application point for purposes of improving solids removal, pH adjustment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a specific result will be considered one
system; the capability to add chemicals) to dual units will be rated as one system; capability to add a chemical at a different application points for different
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Condhiordng. The addition of a chemical compound such as lime, ferric chloride. or a polymer to wet sludge to coalesce the mass prior to
its application to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing Inorganic. non -toxic materials from sand. gravel,
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by N€trification- A single stage system required to achieve permit effluent limhs on BOD
and ammonia nitrogen within the same biological reactor,
(13) Dechlodnatlon. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process;
(14) Denitrification Process. The conversion of nitrate -nitrogen to nitrogen gas;

(15) Electrodialysis. Process for removing Ionized salts from water through the use of Ion -selective Ion -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the Introduction of air In the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit arid other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower sludge digestion chamber.
(20) Instrumented Flow Measurement. A device which indicates and records rate of flow;
(21) Ion Exchange. A chemical process In which Ions from two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e.. chisel plow); [not applicable for types of sludge described in (11) of this Rule);
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Microscreem A low speed. continuously back -washed, rotating drum filter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal. Biological. The removal of phosphorus from wastewater by an oxlc/anoxlc process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) Polishing Pond. A holding pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids;
(28) Post Aeration. Aeration following conventional secondary treatment units to Increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen Is added to the effluent by a nonmechanical, gravity means of flowing down a
series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus. zero points are assigned even though this Is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon Is feed controlled Into the system;
(31) Preaeratiom A tank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units. Unit operations In the treatment process. such as screening and comminution. that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment Unit, Industrial. The conditioning of a waste at its source before discharge, to remove or to neutralize substances Injurious to sewers and
treatment processes or to effect a partial reduction In load on the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated;
b) Pre-treatment Program. Industrial • must be a State or EPA required program to receive points on the rating shoot;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which Is associated with the solids;
(35) Pumps. All Influent. effluent and In -plant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process In which a heavy contaminated liquid Is pressurized through a membrane forming nearly pure liquid free from
suspended solids;
(38) Rotating Biological Contractors. A fixed biological growth process In which wastewater flows through tanks In which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons. or some other treatment process In which further biodecomposition Is
expected to produce desired effluents; Hydraulic loading rates on these filters are computed in gpd/ac and have a resulting low gprn/sf (less than one);
b) Recirculating biological - the same type of sand filter as defined In Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filter,
(40) Sand or Mixed -Media Filters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids;
(a) low rate — gravity. hydraulically loaded filter with loading rates In the one to three gpm/sf range;
(b) high rate -- a pressure. hydraulically loaded fitter with loading rates In the five gpm/sf range; At any rate. the loading rate will exceed three gprrVsf;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reperation. A part of the contact stabilization process where the activated sludge Is transferred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank. A single -story settling tank In which settled sludge Is In contact with the wastewater flowing through the tank; shall not be applicable for
septic tank systems serving single family residences having capacity of 2.000 gallons or less which discharge to a nitrification field;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified. liquefied, mineralized or converted into more stable organic matter
through the activity of living organisms, which includes aerated holding tanks;
(45) Sludge Drying Beds. An area comprising natural or artificial layers of porous materials upon which digested sewage sludge Is dried by drainage and
evaporation;
(46) Sludge Elutriation. A process of sludge concraloning In which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utliization. The process of using sewage gas for the purpose of heating buildings, driving engides. etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester In which sludge may be
kept fresh. and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the
sludge fresh. but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated tank would simply be used to
decant sludge prior to dewatering and would not allow long periods (several days of detention) without resulting odor problems;
(49) Sludge Incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal} A process to make treated sludge less odorous and putrescible. and to reduce the pathogenic organism
content; This may be done by pH adjustment. chlorine dosing. or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank In which the sludge Is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon.A type of oxidation lagoon in which biological oxidation of organic matter is effected by natural transfer of oxygen to the water from
air (not a polishing pond);
;
(53) Stand -By Power Supply. On she or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, Including non•biodegradable particulate (floatable solids, suspended solids and BOD
reduction) from municipal and industrial wastewater treatment systems;
(65) Tertiary Treatment. A. stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal filter
might be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing In tubes to another fluid outside the tubes, or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to Improve the dewaterablitty of sludge by the
solubillzing and hydraulizing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes. Including disease -causing agents which after discharge and upon exposure. Ingestion. Inhalation
or assimilation Into any organism. either directly from the environment or indirectly by Ingestion through food chains, will cause death. disease, behavioral
abnormalities. cancer. genetic mutations. physiological malfunctions (Including malfunctions in reproduction) or physical deformations. in such organisms or their
offspring; Toxic materials Include, by way of Illustration and not Iimhatlon: lead. cadmium. chromium. mercury. vanadium. arsenic, zinc. ortho-nitro-chlorobsnzene
(ONCE), polychlorinated blphanyls (PCBs) and dichlorodiphenyl trlchlorcethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling Filter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater Is distributed; A high rate trickling
fitter Is one which operated at between 10 and 30 mgd per acre. A low rate trickling filter Is one which Is designed to operate at one to four mgd per acre;
(60) Trickling Filter (Packed Tower). A plug flow type of operation In which wastewater flows down through successive layers of media or filtrate material; Organic
material Is removed continually by the active biological fixed growth in each successive layer. This method may produce 'secondary' quality effluent, or may be
adapted to produce a nitrtfled effluent;
(61) Vacuum Filter. Centrifuges. or Filter Presses. Devices which are designed to remove excess water from either digested or undigested sludge prior to disposal
or further treatment.

NPDES No. NC0085863. Heater Utilities, Inc., 202 McKenan Court Cary, NC 27519
has applied for a permit renewal for a facility located at Waterfall Plantation Water
Treatment Plant, NCSR 1923, Wake Forest, Wake County. The facility discharges
treated filter backwash from a well -water treatment system from one outfall into Horse
Creek, a class WS-IV NSW CA stream in the Neuse River Basin. No parameters are
water quality limited, but this discharge may affect future allocations.

State of North Carolina
Department of Environment
and Natural Resources
Division of Environmental Health
Public Water Supply Section
James B. Hunt, Jr., Go6emor
Wayne McDevitt, Secretary
Linda C. Sewall, Director
MEMORANDUM
NCDENR
Nc 1 CA ouN Dcnen Kw of
EMIRI Ms:+T o N� RC Rce3
TO: David Goodrich
Discharge Permits Unit
Division of Environmental Management
FROM: Linda Sewall.
Division Director
Division of Environmental Health
DATE: December 5, 1997
SUBJECT: Draft National Pollutant Discharge
Elimination System Permit #NC0085863
Waterfall Plantation Subdivision
Mica Mine Rd., in Thompson Mill Subdivision
NCSR 1923
Wake Forest, Wake County
Reference is made to the above mentioned Draft National Pollutant Discharge
Elimination System Permit. We have reviewed this permit application and determined that
the proposed discharge will not be sufficiently close to any existing or known proposed
public water supply intake so as to create an adverse effect on water quality.
We concur with the issuance of this permit provided the facility is operated and
maintained properly, the stated effluent limits are met prior to discharge, and the discharge
does not contravene the designated water quality standards.
If we can be of further assistance, please contact us.
LS/GTL/ncp
cc: J. Wayne Munden
Michael L. Douglas
3900 Barren Drive, Suite 101, Raleigh, NC 27609 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer %% recycied/10% post -consumer paper

PERMIT NOTES mlc
NC0085863 Waterfall S/D WTP 03-04-01
Class I Facility Neuse River Basin
9/10/97 Received application, Short Form D, and $200.
9/25 Requested SR.
12/5 Received SR. Jarwin Hester, WCDH, recommends issuance.
12/15 Received DEH concurrence to issue.
Receiving Stream: Horse Creek WS-IV NSW CA Index #: 27-17-(2)
From Mud Creek to Falls Lake, Neuse River 8/3/92
Compliance data: no violations Flow is > 0.006 MGD
Chlorin3 in discharge has been between 0.8 and 0.9 mg/l.
CF Notes: Facility started operation in 9/97; no inspection reports yet.
3/10 Drafting permit:
Added TN calculation special condition language and TN & TP monitoring per Neuse Strategy.
Took out pH monitoring requirement; not required for WTP's.
To Steve Pellei for review.
Public Notice: Schedule to Issue: Issue date:

A. (). 1. FLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0085863
During the period beginning on the effective; date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outf'all(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
CIII uent_ Charms tc eristi Discharge Limitations Monitoring Requirements
Lbs/day tlnits�$pe-C-ifyJ Measurement_ �rD-1 e *Sample
Mon. Avg. Daily Max Mon. Avg. Daily Max, Frequency Type Location
I -low Weekly Instantaneous E
Total Suspended Solids 30.0 mg/I 45.0 mg/I 2/Month Grab E
Scttleable Solids 0.1 m I/ I 0.2 m l/ I Weekly Grab E
Turbidity ' Weekly Grab U,D
Iron Weekly Grab E
Total Residual Chlorine Weekly Grab E
-Td
Sample locations: E - Effluent, U - Upstream, D - Downstream
** The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural
background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
All samples collected should be of a representative discharge.
The pH all not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
camp
There shall be no discharge of floating solids or visible foam in other than trace amounts.
1
• 1

DIEHL & PHILLIPS, P.A. 4; ja©' U
CONSULTING ENGINEERS
219 East Chatham Street
Cary, North Carolina 27511
Telephone [phone] • Fax [phone]
Ms. Mary L.
NPDES Group
Division of
NCDEHNR
PO Box 29535
Raleigh, NC
Cabe
Water Quality
27626-0535
April 28, 1997
Re: Permit No. AC0085863
Waterfall Plantation WTP
Dear Ms. Cabe:
WILLIAM C. DIEHL, P.E.
JOHN F. PHILLIPS, P.E.
ALAN R. KEITH, P.E.
In response to our telephone conversation of April 28, 1997, I am
enclosing a check for $100.00 for a permit modification for the
referenced project. I am requesting that the permit be modified to
reflect the fact that the final design of the sand drying bed resulted
in a 400 square foot bed rather than the 300 square foot bed that was
originally permitted.
Upon further reflection, I have decided that the permitted flow should
remain at 6,100 gpd, rather than requesting the reduced flow you and I
discussed. If after operating this facility for some time we find
that wastewater flows are significantly less than 6,100 gpd, we will
consider making another permit modification request at that time.
Please let me know if I can provide further information.
Sincerely,
`Diehl & Phillips, P.A.
V
William C.
CC: Jill Strickler
Diehl, P.E.