NC0085863_Issuance of Permit_19990623

a)
State of North Carolina
Department of Environment
and Natural Resources AN,
Division of Water Quality
James B. Hunt, Jr., Governor I1CDEI1I
Wayne McDevitt, Secretary NORTH CAROLINA DEPARTMENT OF
Kerr T. Stevens, Director ENVIRONMENT AND NATURAL RESOURCES
June 23, 1999
Mr.Jerry Tweed
Heater Utilities, Inc.
202 MacKenan Court
Cary, North Carolina 27519
Subject: Issuance of NPDES Permit NC0085863
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 spy..er 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.
dsr filer[ signed 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]
An Equal Opportunity Affirmative Action Employer 50%recycled /10%post-consumer paper

Permit NC0085863
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 NC0085863
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.

118 719 'm 721 32'30" 'Z2 2140C
by
Ocolko
�� _-� 9 I s/ �CF :: 2�rr�� J�-��i/ / � _ � - �3 ..\1,•`.• sp�� .. . \� 'R\3 \ '.� �
�..».Cxm l
_ ,J}. � -_ _ ram.. ,' ; � t"_. \� ;.; ' ••. ��
AP
zz
N lit
1229
ICA
57
`.� �t�/// -� • \�pp +� � � � �"•.'•'ate J • — - ' � /'
q ✓ruler
398. •, _ i Pert, I '
pe m1373
Cern
, d
1E A04!-,f!;
Ilk
•p �/ '.
eel
: tom• �'^ '� I „� a�c� �_�q �'�
xjw
_ / _ / Hsi` � � �•�� l.\�1_�.\ _ _- r--_ _= �,� _-_ _ --
Latihrde: 35°58' 49"
Longitude: 78°33' 15"
Quad # D24NE
Receiving Stream Horse Creek
Stream Class: WS-N NSW
Subbasin 30401
NC008S863
Heater Utilities
Waterfall Plantation WTP
Facility
Location J
V 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:
siruntrit L MONtYtdR$hG REQUIREMENTS
CHARACTERISTICS
Monthly Weekly Measurement Sample Type Sample Location*
Ayge Averae Frequency
Flow Weekly Instantaneous Effluent
Total Suspended Solids 30.0 mg/L 45.0 mg/L 2/Month Grab Effluent
Settleable Solids 0.1 mVl 0.2 ml/l Weekly Grab Effluent
Turbidity 2 2 Weekly Grab Upstream&Downstream
Total Nitrogen NL(mg/L) Monthly3 Grab Effluent
(NO2+NO3+TKN)3 NL(lb/month) Monthly3 Calculated Effluent
NL(lb/year) Annually3 Calculated Effluent
Total Phosphorus Monthly Grab Effluent
Iron Weekly Grab Effluent
Total Residual Chlorine Weekly Grab Effluent
Notes:
1 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 NFU. If the turbidity
exceeds these levels due to natural background conditions, the effluent cannot cause any increase
in the turbidity in the receiving stream.
3 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.

. ' '•.:. .; Oe J /,C
'-,▪ .._`,, ,`l
.A.
Fes' 'M`
, + NORTH CAROLINA DEPARTMENT OF
'�'' ENVIRONMENT AND NATURAL RESOURCES
, rwA
.... t
DIVISION OF ENVIRONMENTAL HEALTH
PUBLIC WATER SUPPLY
: '.:-;,-4&4,‘.1-,it'74* : .4.4-'
NCDENR •
JAMES B.HUNTJA.
GOVERNOR ) '
MEMORANDUM
WAYNE MCDEVITT ' TO: David Goodrich
` SECRETARY
_ ' Discharge Permits Unit '.o -T,
CO On
i r., : Division of Environmental Management rn 2
�.
F to j ? :�
FROM: Linda Sewall . N '= rn
LINDA C.SEWALL '': Lo =;gym
DIRECTOR Division Director .� C)M
8.4t '', Division of Environmental Health =L moo
EaiA
ry
_xY�., - , DATE: September 17, 1998 V z
• ,,. ,i 4 ' ' SUBJECT: Draft National Pollutant Discharge
Elimination System Permit #NC0085863
, .
i ,
,,. ...
y _� Waterfall Plantation Subdivision Water Treatment Facility
40 Wake Forest, Wake County
1
I
4 e' ,r.' Reference is made to the above mentioned Draft National Pollutant
` ii til r, -,
Discharge Elimination System Permit. We have reviewed this permit
application and determined that the proposed discharge will not be
IL �; t4scc sufficiently close to any existing or known proposed public water supply
���.-- <, intake so as to create an adverse effect on water quality.
,IIs. _ ;
tz 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
i,,, a .4.,
, .... ., , ,. quality standards.
-vim i
If we can be of further assistance, please contact us.
ko1.
s'
LS/MLD/ncp
• cc: J. Wayne Munden
Alf 3800 BARRETT DRIVE,SUITE 101,RALEIGH,NORTH CAROLINA 27609
c -c� PHONE [phone] FAX [phone]
r ,• AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER-50%RECYCLED/10%POST-CONSUMER PAPER

47k - fili/rT
''',,,,,, ., ,,. -, •
a NORTH CAROLINA DEPARTMENT OF
'' Ki� — ENVIRONMENT AND NATURAL RESOURCES
`+� - '4-ti{/ DIVISION OF ENVIRONMENTAL HEALTH
A' { ti )r ° PUBLIC WATER SUPPLY
NCDENR ; '"Ctf .
's JAMES B.HUNT) 1
GOVERNOR 74
Y 74
MEMORANDUM
WAYNEMCDEVITT >,.d. TO: David Goodrich
7 SECRETARY `S.r
Discharge Permits Unit
•...,. Division of Environmental Management
:s
FROM: Linda Sewall 6
*• ; LINDA C.SEWALL
�,, DIRECTOR 3 Division Director
'� A' Division of Environmental Health
=`: 1 , DATE: August 10, 1998 -
7 , :A . .
z , a,ra •-•4-,,,,,i , SUBJECT: Draft National Pollutant Discharge
r- t k
' Elimination System Permit #NC0085863 ,,
" � Waterfall Plantation Subdivision Water Treatment Facility
NCSR 1923, Wake Forest
'41 . , ! Wake Countyi 1
14 "I
k �: 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
ig. sufficiently close to any existing or known proposed public water supply
intake so as to create an adverse effect on water quality.
''` r We concur with the issuance of this permit provided the facility is
-...� �� mo-.:�
ori t=;17
� � operated and maintained properly, the stated effluent limits are met prior to
.i-, ^-r --",.-0.. .: discharge, and the discharge does not contravene the designated water
.1 ,,, t '� quality standards.
If we can be of further assistance, please contact us.
41011.61.1.*' :r'?. LS/MLD/ncp
cc: J. Wayne Munden
...f.;,-.
l 3500 BARRETT DRIVE,SUITE 101,RALEIGH, NORTH CAROLINA 27609
,..;71:::Y,:,,,
�,� PHONE [phone] FAX 919-S71-4715
ti <,' AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER-50% RECYCLED/10%POST-CONSUMER PAPER

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: 35°58'49"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 Wastewater to 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
trsatment facilities:
A00 + 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 wastewater treatment 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/disposal scheme:
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 y9 V
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
' 5V413' 6()114)4
Water Quality Regional Supervisor
Date (1"
(l (q 7

•
RATING SCALE FOR CLASSIFICATION�QJI O_F' `� `WATERT POLLUTION CONTROL SYSTEMS
�a
Name of Facility: 'KtC1 �Lk11
Owner or Contact Person: —1 'riued
Mailing Address: 402- Mc,Ztt4C.I-. (t.0• Sar (1 885) Ca AC , 1797
County: WaKe, Telephone: (a/KO ti67 —78511
Present Classification: New Facility Existing Facility ✓
NPDES Per. No. NCO() 8 8 3 Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: 3 'Ui i•,J Telephone: [phone](1 Date: 10/Vii
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: Grade: Telephone:
Check Classification(s): Subsurfa a Spray Irrigation Land Application
Wastewater Classification: (Circle One) I II III IV Total Points: 8
IN-PLANT PROCESSES AND RELATED CONTROL EOUIPMENT WHICH ARE AN INTEGRAL PART OF INDUSTRIAL PRODUCTION SHALL NOT HE
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CLASSIFICATION.ALSO SEPTIC TANK SYSTEMS CONSISTING ONLY OF SEPTIC TAN(
AND GRAVITY NITRIFICATION LINES ARE EXEMPT FROM CLASSIFICATION.
St SURFACE CLASSIFICATION SPRAY IRRIGATION CLASSIFICATION
(check all units that apply) (check all units that apply)
1. septic tanks 1. preliminary treatment (definition no. 32 )
2. pump tanks 2. lagoons
3. siphon or pump-dosing systems 3. septic tanks
4. sand filters 4. pump tanks
5. grease trap/interceptor 5. pumps
6. oil/water separators 6. sand filters
7. gravity subsurface treatment and disposal: 7. grease trap/interceptor
8. pressure subsurface treatment and disposal: 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. Oilwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filler 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 disposal;
6._Aquaculture 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 dassified if permitted after July 1,
1993 or N 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.

(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 and 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)Microscreen. 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 oxic/anoxic 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) Preaeratlon. 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 sheet;
(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 biodecompositlon is
expected to produce desired effluents;Hydraulic loading rates on these filters are computed In gpd/ac and have a resulting low Wm/sl(less than ons);
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 Fitters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids;
(a)low rate—gravity,hydraulically loaded filler with loading rates in the one to three gpmVsf range;
(b)high rate—a pressure,hydraulically loaded filter with loading rates in the five gpnnVsf 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 Reaeration. 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 conditioning in which certain constituents are removed by successive washings with fresh water or plant effluent;
(47)Sludge Gas Utilization The process of using sewage gas for the purpose of heating buildings,driving engines,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 cornbustble materials and reduce the sludge to a sterile ash;
(50)Sludge Stabilization(Chemical or Thermal). A process to make treated sludge less odorous and putrescble,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 site 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;
(55)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 heal 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 dewaterabllity of sludge by the
soiubilizing 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 limitation:lead,cadmium,chromium,mercury,vanadium,arsenic,zinc,ortho-nitro-chlorobenzene
(ONCB),polychlorinated biphenyls(PCBs)and dichiorodiphenyl trichloroethane(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
filter 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 nitrified 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 4 • •
and Natural Resources ��►
Division of Environmental Health
Public Water Supply Section
James B. Hunt, Jr., Governor NCDENR
Wayne McDevitt, Secretary NonT►+ CARouNA DE>•MRTME►1T or
Linda C. Sewall, Director ENVIRONMENT AND NauRuu. REsourtc 3
MEMORANDUM
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
3800 Barrett Drive,Suite 101,Raleigh,NC 27609 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/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. ( ). EFFLUENT 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 ' •
outfall(s) serial number(X)I. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent__ Characteristics Discharge Limitations Monitoring Requirements
Lbs/day Units (specify Measurement aan_ipte 'Sample
Mon. Avg. Daily Max Mon. Avg, Daily Max. Frequency Type Location
Flow Weekly Instantaneous E
Total Suspended Solids 30.0 mg/I 45.0 mg/I 2/Month Grab E
Settleable Solids 0.1 m I/I 0.2 m I/I Weekly Grab E
Turbidity ' * ' ' Weekly Grab U,D
Iron Weekly Grab E
Total Residual Chlorine Weekly Grab E
-I d
i P
* 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
same
There shall be no discharge of floating solids or visible foam in other than trace amounts.
I
4

�3SI 3
DIEHL & PHILLIPS, P.A. f'IOp` 0O
CONSULTING ENGINEERS WILLIAM C.DIEHL,P.E.
219 East Chatham Street JOHN F.PHILLIPS,P.E.
Cary,North Carolina 27511 ALAN R. KEI'T'H,P.E.
Telephone[phone]•Fax[phone]
April 28, 1997
Ms. Mary L. Cabe
NPDES Group
Division of Water Quality
NCDEHNR
PO Box 29535
Raleigh, NC 27626-0535
Re: Permit No. A00085863 J�
Waterfall Plantation WTP
Dear Ms. Cabe:
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.
William C. Diehl, P.E.
cc: Jill Strickler