WQ0004663_Final Permit_19910514

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street - Raleigh, North Carolina 27626-0535
James G. Martin, Governor
William W. Cobey, Jr., Secretary
Mr. Perry Harrison, Superintendent
Chatham County Board of Education
501 West Street
Pittsboro, North Carolina 27312
Dear Mr. Harrison:
George T. Everett,Ph.D.
Director
May 14, 1991
Subject: Permit No. WQ0004663
Chatham County Board of Education
Moncure Elementary School
Subsurface Disposal System
Chatham County
In accordance with your application received January 29, 1991, we. are forwarding
herewith Permit No. WQ0004663, dated May 14, 1991, to the Chatham County Board of.
Education for the construction and operation of a 3,300 GPD pressure manifold subsurface
wastewater disposal system..
This permit shall be effective from the date of issuance until April 30, 1996, 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 to you,
you have the right to request an adjudicatory hearing upon written request within 30 days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of 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, ple s contact Mr. Dana Bolden at 919/ 733-5083.
Sin erely,
eorge T. Ev rett
cc: Cheatham County Health Departmen
Raleigh Regional Office
Groundwater Section
Training and Certification Unit
Ellinwood Design Associates, Ltd.
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

cr

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SUBSURFACE DISPOSAL SYSTEM PERMIT
In accordance with the provisions of Article 2.1 of Chapter 143, General Statutes of North
Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Chatham County Board of Education
Chatham County
10
construction and operation of a 3,304 GPD subsurface wastewater disposal system consisting of
an existing septic tank, an effluent pumping station with duplex 86 GPM pumps and high water
alarms, two six inch diameter pressure manifolds each with 11 taps, 3,520 linear feet of drain line
in 36 inch wide conventional nitrification trenches, and all associated piping and appurtenances to
serve Moncure Elementary School with no discharge of wastes to the surface waters, pursuant to
the application received January 29, 1991 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, 1996, and shall be
subject to the following specified conditions and limitations:
I. PERFQRMANCE 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. Mail the Certification to the Permits and Engineering
Unit, P.O. Box 29535, Raleigh, NC 27626-0535.
2. The Raleigh Regional Office, phone no. [phone], shall be notified at least
forty-eight (48) hours in advance of backfilling 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 perforin satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including
those as may be required by this Division, such as construction of additional or
replacement wastewater treatment or disposal facilities.
4. 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.

5. This permit shall become voidable if the soils fail to adequately absorb the wastes
and may be rescinded unless the facilities are installed, maintained, and operated in
a manner which will protect the assigned water quality standards of the surface
waters and ground waters.
6. Adequate measures shall be taken to divert stormwater from the disposal area and
prevent wastewater runoff from the subsurface disposal field.
7. The sludge generated from these treatment facilities must be disposed of in
accordance with General Statute 143215.1 and in a manner approved by the North
Carolina Division of Environmental Management.
8. A usable reserve area shall be maintained for wastewater disposal. The reserve area
shall have the capability of accommodating the average daily flow of the facility
being served without exceeding the•loading rates of the reserve area while meeting
all required buffer requirements.
9. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
10. The following buffers shall be maintained:
a) 100 feet between disposal area and any public or private water supply including
wells
b) 100 feet between disposal area and "SA and SB" classified surface waters
c) 50 feet between disposal area and any stream, lake, river or natural drainageway
d) 50 feet between disposal area and property lines
e) 10 feet between disposal area and surface water interceptor drains or diversions
(upslope)
f) 25 feet between disposal area and surface water interceptor drains or diversions
(downslope) and groundwater drainage systems.
11. A leakage test shall be performed on the dosing tank to insure that any exfiltration
occurs at a rate which does not exceed twenty (20) gallons per twenty-four (24)
hour per 1,000 gallons of tank capacity. The engineer's certification will serve as
proof of compliance with this condition.
II, QPFRATION AND MAINTENANCE RE0111REMENTS
1. The facilities shall be properly maintained and operated at all tunes
2. Upon classification of the facility by the Certification Commission, the Permittee
shall employ a certified waster treatment plant operator to be in responsible charge
of the wastewater treatment facilities. The operator must hold a certificate of the
type and grade at least equivalent to the classification assigned to the wastewater
treatment facilities by the Certification Commission. Once the facility is classified,
the Permittee must submit a letter to the Certification Commission which designates
the operator in responsible charge within thirty days after the wastewater treatment
facilities are 50% complete.
3. The application rates to the disposal field shall not exceed 0.3125 GPD/ft2.
4. The facilities shall be effectively maintained and operated as a non -discharge system
to prevent the discharge of any wastewater resulting from the operation of this
facility.
2

5. No traffic or equipment shall be allowed on the disposal area except while
installation occurs or while normal maintenance is being performed.
6. A suitable cover shall be maintained on the fields and the fields shall be kept
mowed. The clippings shall be removed to prevent the build up of thatch.
7. The pressure pressure at the manifolds shall be checked and adjusted to approved
specifications monthly.
MONITORING AND REP RTIN(; -REQUIRE ME
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. Adequate records showing all maintenance shall be maintained by the Permittee.
These records should include but are not limited to the following.
Items Inspection Frequency
a) Individual dosing pump operation Monthly
b) Individual field rotation Monthly
c) High water alarms Monthly
d) Residual pressure on manifolds Annually
3. Three copies of all operation and maintenance records (as specified in condition III
2) shall be submitted on or before January 31 of the following year to the following.
address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
4. A record shall be maintained of all residuals removed from this facility. This record
shall include the name of the hauler, permit authorizing the disposal or a letter from
a municipality agreeing to accept the residuals, date the residuals were hauled, and
volume of residuals removed.
5. Noncompliance Notification:
The Permittee shall report by telephone to the Raleigh Regional Office, telephone
no. [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 render the
facility incapable of adequate wastewater treatment such as mechanical or
electrical failures of pumps, aerators, compressors, etc.
3

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.
d. Any time that self-monitoring information indicates that the facility has gone
out of compliance with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in
letter form within 15 days following first knowledge of the occurrence. This report
must outline the actions taken or proposed to be taken to ensure that the problem
does not recur.
IV. GROUNDWATER REQUIREMENTS
1. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
V. INSPECTIONS
1. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee
to insure proper operation of the subject facilities.
2. The Permittee or his designee shall inspect the wastewater treatment and disposal
facilities to prevent malfunctions and deterioration, operator errors and discharges
which may cause or lead to the release of wastes to the environment, a threat to,
human health, or a nuisance. The Permittee shall keep an inspection log or
summary including at least the date and time of inspection, observations made, and
any maintenance, repairs, or corrective actions taken by the Permittee. This log of
inspections shall be maintained by the Permittee for a period of three years from the
date of the inspection and shall be made available upon request to the Division of
Environmental Management or other permitting authority.
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 and facility
at any reasonable time for the purpose of determining compliance with this permit;
may inspect or copy any records that must be kept under the terms and conditions
of this permit; or 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, 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 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

4. Prior to any transfer of this land, a notice shall be given to the new owner that gives
full details of the materials applied or incorporated at this site.
5. A set of approved plans and specifications for the subject project must be retained
by the applicant for the life of the project.
6. 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 15 NCAC 2H.0205 (c)(4).
7. 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.
8. The wastewater treatment facility shall connect to a publicly owned areawide
sewage collection system within 180 days of its availability. All discharge of
wastewater to the system shall cease at the time of the connection to the sewerage
collection system.
9. 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.
10. 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 14th day of May, 1991
RTH CAROLINA E''IRONMENTAL MANAGEMENT COMMISSION
—G6orge T. Ever6tt,,bire r
Division of EIV, onrrenmomental.
anagement
By Authority of the Management Commission
Permit Number WQ0004663
5

Permit No. WQ0004663
May 14, 1991
Engineer's Certification
1, , 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, for the
Project Name Location
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 the approved plans and specifications.
Signature Registration No.
Date
1.9

00
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SANPORD I?:
'apped, edited, and published by the Geological Survey
ontrol by USGS, USC&GS, and North Carolina Geodetic Survey
MN I
)pography by photogrammetric methods from aerial photographs
ken 1965. Field checked 1969 i
alyconic projection. 1927 North American datum go Muse' I os
x,000 -foot grid based on North Carolina coordinate system t! zo Mie$
peter universal Transverse Mercator grid ticks,
shown ;n blue 'q
iL, ed dashed fines indicate selected fence and field lines where
�nerally visible on aerialphotographs. This information is unchecked uT"' GRIM AND T C NTERMAGNETICNORTH
DECLINATION AT CENTER OF ,',;:EET
I
14
so�-.
674
low 0
1 --
lue hatching indicates area to be submerged by New Hope Lake. THIS MAP [
yeas covered by dashed light -blue pattern are subject FOR SALE BY
I controlled inundation A FOLDER DESCRIBINP

(m) Reverse Osmosis ...............................
5
1
(e)
Electrodialysis .... . ................. . .......
5
(f)
Foam Separation .............................
5
(J)
Ion Exchange ................................
5
(h)
Land Application of Treated Effluent
(p)
Treatment processes for removal of toxic
(see definition no. 22b) (not applicable for
materials other than metal or cyanide .........
sand, gravel, stone and other similar mining
(7) SLUDGE TREATMENT
10
operations)
(8)
1 0
(i) on agriculturally managed sites (See def.
Aerobic ...............
5
No, 4) ...................................
10
3
(ii) by high rate infiltration on non -agriculturally
Sludge Stabilization (chemical or thermal) .... ...
5
managed sites (includes rotary distributors
Sludge Drying Beds - Gravity .................
2
and similar fixed nozzle systems) ...........
4
5
(iii) by subsurface disposal (includes low pressure
Sludge Elutriation .............................
pipe systems and gravity systems except at
(e)
Sludge Conditioner (chemical or thermal) ... _ ....
plants consisting of septic tank and nitrifica-
(f)
Sludge Thickener (gravity) ......................
tion lines only) .............................
40
(i)
Microscreens..................................
5
(j)
Phosphorus Removal by Biological Processes
(9)
Sludge Gas Utilization (including gas storage) .. . .
(See def. No. 26) .............................
20
(k)
Polishing Ponds - without aeration .......
2
with aeration ..........
5
(I)
Post Aeration - cascade ..............
0
diffused or mechanical ...
5 (10)
(m) Reverse Osmosis ...............................
5
(n)
Sand or Mixed -Media Filters - low rate ...........
2
high rate ..........
5
(c)
Treatment processes for removal of metal or
similar dewaterfng devices ............. . ......
10
cyanide ....................................
15
(p)
Treatment processes for removal of toxic
(b) Land Application (surface and subsurface)
materials other than metal or cyanide .........
1 5
(7) SLUDGE TREATMENT
10
(a)
Sludge Digestion Tank - Heated ...............
1 0
2
Aerobic ...............
5
not hold the permit for the wastewater treatment
Unheated ...... .....
3
(b)
Sludge Stabilization (chemical or thermal) .... ...
5
(c)
Sludge Drying Beds - Gravity .................
2
5
Vacuum Assisted .......
5
(d)
Sludge Elutriation .............................
5
(e)
Sludge Conditioner (chemical or thermal) ... _ ....
5
(f)
Sludge Thickener (gravity) ......................
5
(g)
Dissolved Air Flotation Unit
(not applicable to a unit rates as (3) (i) .........
8
(h)
Sludge Gas Utilization (including gas storage) .. . .
2
(i) Sludge Holding Tank - Aerated ................
5
Non-aerated ............
2
(j) Sludge Incinerator - (not including activated
carbon regeneration) .....
10
(k) Vacuum Filter, Centrifuge or Filter Press or other
similar dewaterfng devices ............. . ......
10
SLUDGE DISPOSAL (including incinerated ash)
(a)Lagoons........................................
2
(b) Land Application (surface and subsurface)
(see definition 22a)
-where the facility holds the land app. permit . . .
10
-by contracting to a land application operator who
holds the land application permit ................
2
-land application of sludge by a contractor who does
not hold the permit for the wastewater treatment
facility where the sludge is generated . _ . ......
10
(c) Landfilled (burial) .... . ............ . ...........
5
DISINFECTION
(a) Chlorination ..............................
5
(b) Dechlorination ........................
5
(c) Ozone ....... ......................
5'
(d) Radiation ..........................
5
CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(net applicable to chemical additions rated as item
(3) (1), (5) (a) (xi), (6) (a), (6) (b), (7) (b). (7) (e).
(9) (a), (9) (b), or (9) (c) 5 points each: List:
5
5
5
5
(11) MISCELLANEOUS UNITS
(a) Holding Ponds, Holding Tanks or Settling Ponds
for Organic or Toxic Materials including wastes
from mining operations containing nitrogen and/or
phosphorous compounds in amounts significantly
greater than is common for domestic 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 ....................................... 5
(d) Pumps ................................................... ......................................... ........ C:Z)
(e) Stand -By Power Supply.................................................................. 3
(f) Thermal Pollution Control Device.. ........ ............... . 3

TOTAL POINTS )a
CLASSIFICATION
Sand Filters -
Class 1 .........................................................
5 -
25
Points
Class il........................................................
26-
50
Points
Class III ......................................................
51-
65
Points
Class IV ........................................................
66-
Up
Points
Facilities having a rating of one through four points, inclusive,
do not require a certified operator. Classification of ak other
facilities requires a comparable grade operator in responsible
charge.
Facilities having an activated sludge process will be assigned
a minimum classification of Class il.
Facilities having treatment processes for the removal of metal
or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes fqr the biological removal
of phosphorus will be assigned a minimum classification of Class'
III.
DEPINITIONS
(I)Activaled Carbon Beds. A physicaUchemical method for reducing soluble organic material from
wastewater effluent; the column-lype buds used in this method will have a flow rate varying from two
to eight gallons per minute per square fool and may be either upflcw or downfiow carbon beds. Carbon
may or may not be regenerated on the wastewater treatment plant site.
(2)Aorated Lagoons. A basin in which ag solids are maintained in suspension and by which biological
oxidation or organic mailer is reduced through artificially accelerated transfer of oxygen on a Now -
through basis;
(3)Aeration. A process of bringing about intimate contact between air or high purity oxygen in a liquid
by spraying, agilatlon diffusion;
(A)Agriculturally managed site. Any site on which a crop is produced, managed, and harvested (Crop
includes grasses, grains, hoes, 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 simhar
processes which remove petroleum products such as benzene, loluene, and xylene.
(s)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) Carbon ace ous Stage. A stage ct wastewater treatment designed to achieve 'secondary- effluent
limits.
(B)Centriluge. A mechanical device in which centrilugal farce is used to separate solids from liquids
and/or to separate liquids of different densities;
{D)Chemlcai Addition Systems - The addition 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 wil(be
considered one system; the capability to add chemical (s) to dual units will be rated as one system;
capability to ad hemical at difference application points for diffarenl purposes will resuq-in the
systems being separate system. I
(10)Chemical S, ondilioning. The addition of a chemical compound such as lime, ferric chloride, or
a polymer to wet swdge 10 coalesce the mass prior to its applicalion to a dewatering device;
f 1 (vf)
Sand Filters -
intermittent biological . ..
2
recirculating biological .. ...
3
(vii)
Stabilization Lagoons ...................
5
(viil)Clarifier ..............................
5
(ix)
Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see def. No. 12) (Points for this item
have to be in addition to items (5) (a)
(i) through (5) (a) (viii) .............. . ..
8
(x)
Nutrient additions to enhance BOD
removal ...............................
5
(xi)
Biological Culture ("Super Bugs") addition
to enhance organic compound removal .....
5
(b) Nitrogenous Stage
(i)
Aeration - High Purity Oxygen System .....
20
Diffused Air System ...........
1 0
Mechanical Air System (fixed,
floating, or rotor) ...... ......
8
Separate Sludge Reaeration ... , .
3
(ii)
Trickling Filter -
High Rate ..............
7
Standard Rate ............
5
Packed Tower............
5
(iii)
Biological Aerated f=ilter or Aerated
Biological Filter .........................
10
(iv)
Rotating Bfoiogicai Contactors ............
10
(v)
Sand Filter -
intermittent biological . , .. . .. .
2
recirculating biological ........
3
(vi)
Clarifier ................................
5
(6) TERTIARY OR ADVANCED TREATMENT UNIT
(a) Activated Carbons Beds -
without carbon regeneration .................. 5
with carbon regeneration .................... 1 5
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration ...... . .......... 5
with carbon regeneration ................... 1 5
(c) Air Stripping ............................. 5
(d) Denitrification Process (separate process) - . . . . 10

(3) PRELIMINARY UNITS (see definition no. 32)
(a)
Bar Screens ................................
or
(b)
Mechanical Screens, Static .Screens or
Comminuting Devices.. ... ............ .
(c)
Grit Removal ...............................
Or
(d) Mechanical or Aerated Grit Removal ....... ,
(e) Flow Measuring Device .......................
or
(f) Instrumented Flow Measurement .............. .
(g) Preaeration ............... ................. .
(h) Influent Flow Equalization .................. .
(i) Grease or Oil Separators - Gravity ......... .
Mechanical ..........
Dissolved Air Flotation.
(j) Prechlorination ............................. .
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) ............. .
(b) Imhoff Tank ..................................
(c) Primary Clarifiers ........................... .
(d) Settling Ponds or 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 gem or gold
mining) ......................................
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeratjon _ High Purity Oxygen System .... .
Diffused Air System .......... .
Mechanical Air System (fixed,
floating or rotor) ..............
Separate Sludge Reaeration .... .
(i i) Trickling Filter
High Rate .................. .
Standard Rate ..:............
Packed Tower...............
(Iii) Biological Aerated Filter or Aerated
Biological Filter ..................... .
(iv) Aerated Lagoons ........ . ............ .
(v) Rotating Biological Contactors ..........
containing inorganic, non-toxic materials from sand, gravel, crushed stone or other
from which there is no discharge to the surface wafers; such systems shall carry a mar:
points regardless of pumping facilities or any other appurtenances;
(12)Combined Removal of Carbonaceous SOD and Nitrogenous Removal by Nitrification - A single stage
system "designed- to achieve 'advanced' permit elfluenl limits on BOD and ammonia nitrogen within
1 the same biological reactor.
(13)De-chlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical
or physical process;
(14)Donilrificatfon Process. The conversion of nitrate -nitrogen to nitrogen gas;
2 (i5)Elecirodiatysis. Process for removing ionized sails tram water through the use of ion -selective
ion -exchange membranes;
1 (IG)Filter Press. A process operated mschanicalfy 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 line
bubbles; also called foam fractfonallon;
1 (18)Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19)lmholl Tank. A doep Iwo story wastewater lank consisting of an upper sedimentation chamber and
2 a lower sludge digestion chamber;
(20)instrumenied Flow Measurement, A device which indicates and/or records rale of flow;
(21)lon Exchange. A chemical process in which ions from Iwo different molecules are exchanged;
(22)band application: (a) Sludge Disposal. A final sludge disposal method by which sludge may be
2 applied to land either by spraying on the surface or by subsurlaco injection (Le., chisel plow); (not
2 applicable for types of sludge described in (11) of this Rule); (b)Trealed Effluent, The process of
spraying treated wastewater onto a land area or other methods of application of wastewater onto a
3 land area as a means of final disposal and/or Irealment;
8 (23) Micros creen. A low speed, continuously back -washed, rotating drum filler operating under
gravity conditions as a polishing method removing suspondad solids from effluent;
(24)Nitrification Process. The biochemical conversion of unoxidizod nitrogen (ammonia and organic
nitrogen) to oxidized nitrogen (usually nitrate);
(25)Nilrogenous 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 oxiclanoxic
5 process designed to enhance luxury uptake of phosphorus by the microorganisms;
(27)Polishing Pond. A holding pond following secondary treatment with sufricieni detention to allow for
the settling of finely suspended solids;
(28)Post Aeration. Aeration following conventional secondary treatment units to increase effluent D.D.
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 serles 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
2 adjustment; thus, zero points are assigned even though this is an essential step to meeting the limits of
the discharge permit;
(30)Powderod or Granular Activated Carbon Food. A biophysical carbon procoss that utilizes biological
activity and organic absorption by using powdered or granular activated carbon; Virgin and/or
20 roganoraled carbon is feed controlled into the system;
1 O (31)Preaeralion. 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;
8 (33)lnduslriaf Pretreatment; (a)Pre-treatment Unit, Industrial. The conditioning of a waste at its
3 source before discharge, to remove or to neutralize subs€ances injurious Io sewers and trealmeTl
processes or to effect a partial redvcllon in load on a treatment process which is operated by She same
governing body as the wastewater treatment plant being sled; (b)Pre-irealmenl Program, industrial -
7 must be a Stale or EPA required program to receive points on the rating sheet;
(34)Primary Gfarifiers. The first seliling 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
5 solids:
(35)Pumps. All influent, effluent, and in -pian) pumps;
10 (36)Radiallon. Disinfection andlor slarilization process utilizing devices emitting uhraviolet or gamma
(37)Reverse Osmosis, A treatment process in whicn a heavy contaminated liquid Is pressurized
10 through a membrane forming nearly pure liquid free from suspended solids;
10 (38)Rolating Biological Contaclors. 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)fniermittent Biological. f=iltration of effluent following septic tanks, lagoons, or
some other trealmarti process in which further biodecomposition is expected to produce desired
efffuents; Hydraulic loading rates on these filters are computed in gpolac and ha,,--esuf8ng tow
gpmisf (less than one); (b)Recirculaling biological - the same type of sand filter as in (a) wish
the added capability to recycle effluent back through the sand filler;

(40)Sand or Mixed -Media Fillers. A polishing process by which affluent limits are achieved through a
further reduction of suspended soiids;(a)low rale -- gravity, hydraulically loaded filler with loading
rates in the one to three gpmisf rango;(b)high rate -- a press hydraulically ioaded tiller with loading
rains in the rive gpmisf range; At any raze, the loading rale will exceed three gpmish
(41)Secondary Clarifiers. A lank which follows the biological unit of a treatment plant and which has
the purpose of removing sludge associated with the blologlcal treatment unils;
(42)Separale 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 basin,,
(43)Saplic Tank. A singlo-story settling lank In which settled sludge Is in contact with the wastewater
flowing through the lank; shall not be applicable for septic lank systems serving
less which discharge to a nitrificalion field;
(44)Sludga Mgestlon. The process by which organic or volatile matter and sludge Is gasified, liquefied,
mineralized or converlad 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;
(48)Sludge.Eiutriation. A process of sludge conditioning In which certain constituents are removed by
successive washings with fresh water or plant olfluent;
(47)Siudge Gas Utilization. The process of using sewage gas for the purpose of heating buildings,
driving engines, etc.;
(48)Sludge Holding tank (Aerated and Ncnaeraled). A lank utilized for small wastewater treatment
plants not containing a digester In which sludge may be kepl fresh, and supernatant withdrawn prior to
a drying method ti.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 lank would simply be used to decant sludge prior to dewatering and 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 burn sludge and to remove all moisture and combustible
materials and reduce the sludge to a sterile ash;
(5o)Sludge Stabilization (Chemical or Thermal). A process 10 make treated sludge less odorous and
pulrescribie, and to reduce the pathogenic organism content; This may be done by pH adjustment
chlorine dosing, or by heal Irealmenl;
(51)Sludge Thickener. A lype of sedimentation tank in which the sludge Is permitted to settle and
Ihfcken through agitation and gravity;
(52)Slabfllzation Lagoon. A typo of oxidation lagoon in which biological oxidation of organic matter is
affected by natural transfer of oxygen to the water Ircm air (not a polishing .pond);
53)Stand-By Power Supply. On site or portable olectricat generating equipmenl;(54) Static Screens,
A stationary screen designed to remove solids including non -biodegradable particulate (ffoalable solids,
suspended solids and SOD reduction) from municipal and industrial
wastewater treatment systems;
(55)Tertiary Treatment. A stage of Ireatment 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 heal is added [or a protracted period
of llme to Improve the dowaterabiilly of sludge by the solubilixing and hydrauiixing of the smaller and
mora 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 She environment or indirectly by ingestion lhroirgh food chains, will cause death, disease,
behavioral abnormalities, cancer, genetic mutations, physio{oglcal malfunctions (including malfunctions
in reproduction) or physical deformations, In such organisms or their offspring; Toxic materials
include, by way illustration and not limitation; lead, cadrolumr chromium, mercury, vanadium,
arsenic, zinc, orlho-nitro-chlorebenzene (ONC5 polychlorinated biphenyls (PCBs) and dlchlorodiphenyi
trichioroothane (DDT); and any other materials that have or may hereafter be determined to have toxic
prcoerties:
(59)Tdckling tiller. A biological treatment unit consisting of malarial such as broken stone or rock
over which wastewater is distributed; A high rale trickling filter Is one which Is operated a; between
10 and 30 mgd per acre. A low rale trickling filler is one which Is designed to operals at one fo four
mgd per acre;
{60)Trickiing Filler (Packed Tower). A plug flow type of operation In which wastewater flows down
through succe- layers of media or filtrate material: Organic material is removed continually bP
active biologi; growth in each successive layer. This method may produce 'sacondary' -qualily
effluent, or m Japled to produce a nitrified effluent;
(61)Vacuum Fr,_,_, Centrifuges, or Filter Presses- Devices which are designed to remove excess
, I-- r...... — „ Ainoe+or; nrinr In r05nn Ril of further
RATING SCALE FOR CLASSIFICATION OF FACILITIES
Narne of Plant: d_' I n d
Owner or Contact Person: YQCf���
Mailing Address: �� /men' Sf� f y �fo.rC3197 a'
County: G�" -� Telephone: f / 36
NPDES Permit No. N000_ Expiration Date:
Issue Date:
Nondisc. Permit No. _ �f�66� Expiration Date: 96
Issue Date: ��y 9�
Rated By: % a°� Date:
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC Grade
Plant Class: (circle one) I I1 Ill
IV
POINTS
ITEM
(1) industrial Pretreatment Units and/or.
Industrial Pretreatment Program
4
(see definition No. 33)
(2) DESIGN FLOW OF PLANT IN GPD
(not applicable to non -contaminated cooling
waters, sludge handling facilities for water
purification plants, totally closed cycle
systems (def. No. 11), and facilities
consisting only of Item (4) (d) or Items (4) (d)
and (11) (d))
0 -- 20,000............ ......,...
2
20,001 -- 50,000 .........................
3
50,001 -- 100,000 ..........................
4
100,001 -- 250,000 ..........................
5
250,001 -- 500,000 ..........................
8
500,001 --1,000,000............'
10
1,000,001 -- 2,000,000 ...... - .................
2,000,001 (and up) - rate 1 point additional for
each
200,000 gpd capacity up to a
maximum of 30
36?e?
Design Flow (gpd)