WQ0004759_Final Permit_19910520

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 George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
May 20, 1991
Mr. Paul Peckins, Acting Town Manager
Town of Knightdale
Post Office Box 640
Knightdale, NC 27545
Subject: Permit No. WQ0004759
Town of Knightdale
Sludge Lagoon Closure
Wake County
Dear Mr. Peckins:
In accordance with your application received February 25, 1991, we are forwarding
herewith Permit No. WQ0004759, dated May 20, 1991, to the Town of Knightdale for the
operation of a land application of sludge program.
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
additional information concerning
733-5083.
cc:
and specifications is being forwarded to you. if you need
this matter, please contact Mr. Lindsay L. Mize at 919/
Sin erely,
0-'L
eorge T.
Wake County Health Department
Tate Lanning & Associates
Raleigh Regional Office
Groundwater Section
Training and Certification Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SLUDGE LAGOON CLOSURE PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North
Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Town of Knightdale
Wake County
FOR THE
construction and operation of a sludge lagoon closure program consisting of the h) place
stabilization of approximately 2,000 cubic yards of sludge with no discharge of wastes to the
surface waters, pursuant to the application received February 25, 1991 and in conformity wi th 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:
PERFORMANCE STANDARDS
1. Upon completion of stabilization/closure a certification must be received from a
professional engineer certifying that the permitted activity has been completed 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. 919/733-2314, shall be notified at least
forty-eight (48) hours in advance of commencement of stabilization activities 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.ill. on
Monday through Friday, excluding State Holidays.
3. This permit shall become voidable if the soils fail to adequately stabilize the wastes
and may be rescinded unless the sites are maintained and operated in a manner
which will protect the assigned water quality standards of the surface waters and
ground waters.
4. The lagoon closure program shall be effectively maintained and operated as a
non -discharge system to prevent the discharge of any wastes resultillg fron] the
operation of this program.

5. 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.
6. In the event that the lagoon closure program is not operated satisfactorily, including
the creation of nuisance conditions, the Permittee shall take any immediate
corrective actions, including the excavation of the lagoons and a re -mediation of
groundwater to preexisting conditions.
7. The following buffers zones shall be maintained:
a) 200 feet from residences under separate ownership for subsurface disposal,
b) 100 feet from "SA and SB" classified waters and public surface water supplies,
c) 50 feet from "WS" classified waters and other streams, creeks, lakes, rivers,
and surface water drainage ways for subsurface disposal,
e) 100 feet from property lines
f) 25 feet from public right of ways for subsurface disposal,
g) 10 feet from upslope interceptor drains and surface water diversions,
h) 25 feet from downslope interceptor drains, surface water diversions,
groundwater drainage system5 and surface drainage ditches.
H. OPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities and disposal sites shall be properly maintained and operated at all
times.
2. A suitable vegetative cover as approved by the Raleigh Regional Office, shall be
maintained after closure is completed.
3. No sludges other than the following are hereby approved for stabilization in this
lagoon closure program in accordance with this pen -nit:
Permit Estimated
Source County Number Volume cubicyards)
Town of Knightdale Wake abandoned 2,000
6. Upon classification of the facility by the Certification Commission, the Permittee
shall employ a certified wastewater 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.
7. Adequate procedures shall be provided to prevent surface runoff from carrying any
disposed or stored sludge material into any surface waters.
Appropriate measures must be taken to control public access to the land application
sites during active site use. Such controls may include the posting of signs
indicating the activities being conducted at each site.
9. Adequate provisions shall be taken to prevent wind erosion and surface runoff from
conveying pollutants from the sludge application area onto the adjacent property or
into the surface waters.
2

10. The site shall be adequately limed to a soil pH of at least 6.5 prior to sludge
application. Sludge may be applied to sites with a pH of less than 6.5 provided a
sufficient amount of lime is also applied to achieve a final pH of the lime, sludge
and soil mixture of at least 6.5.
III. MONITORING AND REPORTING REQUIREMENTS
1. Any monitoring (including groundwater, surface water, sludge, soil, or plant tissue
analyses) deemed necessary by the Division of Environmental Management to
insure protection of the environment will be established and an acceptable sampling
and reporting schedule shall be followed. If monitoring data indicates minimal or
no concern to the Division, reduction of monitoring requirements may be pursued
after two annual reporting periods.
2. Noncompliance Notification:
The Permittee shall report by telephone to the Raleigh Regional Office telephone no.
919/733-2314, 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 with the land application program which results in the land
application of significant amounts of wastes which are abnormal in quantity or
characteristic.
b. Any failure of the land application program resulting in a release of sludge
material to receiving waters.
c. Any time that self -monitoring information indicates that the facility has gone out
of compliance with the conditions and limitations of this perrriit or the
parameters on which the system was designed.
d. Any process unit failure, due to known or unknown reasons, that render the
facility incapable of adequate sludge treatment.
e. Any spillage or discharge from a vehicle or piping system transporting sludge to
the application site.
Persons reporting such occurrences by telephone shall also file a written report in
letter form within 15 days following first knowledge of the occurrence. This report
must outline the actions taken or proposed to be taken to ensure that the problem
does not recur.
IV. GROUNDWATER REQUIREMENTS
The lagoon shall be covered with an impermeable capping material at least one (I )
foot in thickness at all locations with a hydraulic conductivity of no greater than 1
x 10-6 centimeters per second when compacted. Verification of the liner's
compliance with hydraulic conductivity and thickness specifications must be
provided to the Division of Environmental Management, Groundwater Section,
by the project engineer.
3

2. The Compliance Boundary for the disposal system is specified by regulations in 15
NCAC 2L, Groundwater Classifications and Standards. An exceedance of
Groundwater Quality Standards beyond the Compliance Boundary is subject to
penalty provisions applicable under General Statute 143-215.6(1)a. The sale of
property, by the Permittee, which is within or contiguous to the disposal system
site may alter the location of the Compliance Boundary.
For facilities permitted prior to December 30, 1983, the Compliance Boundary is
established at the lesser of 500 feet from the wastewater lagoons, or the property
boundary, whichever is less.
If the title to any property which may affect the location of the Compliance
Boundary is changed, the Permittee shall notify the DEM Director within 14 days.
The Director shall then establish a modified Compliance Boundary which will be
done as a modification to the Permit.
The REVIEW BOUNDARY for the disposal system is specified by regulations in
15 NCAC 2L, Groundwater Classifications and Standards. A REVIEW
BOUNDARY is established around disposal systems midway between the
Compliance Boundary and the perimeter of the waste disposal area. When the
concentration of any substance equals or exceeds the maximum allowable
concentration of that substance at the REVIEW BOUNDARY, as determined by
monitoring, the permittee shall either (i) demonstrate, through predictive
calculations or modeling, that natural site conditions, facility design and operational
controls will prevent a violation of standards at the Compliance Boundary; or, (ii)
submit a plan for the alteration of existing site conditions, facility design or
operational controls that will prevent a violation of standards at the Compliance
Boundary, and implement that plan upon its approval by the Director.
Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
V. INSPECTIONS
The Permittee or his designee shall inspect the sludge storage, transport, 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 front the
date of the inspection and shall be made available upon request by the Division of
Environmental Management or other permitting authority.
2. 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 penilit;
may inspect or copy any records that trust be kept under the terms and conditions
of this permit; or may obtain samples of groundwater, surface water, or leachate.
0

VL GENERAL CONDITIONS
This permit shall become voidable unless the lagoon closure activities are carried
out in accordance with the conditions of this permit and in the manner approved by
this Division.
2. This permit is effective only with respect to the nature and volume of wastes
described in the application and other supporting data.
3. This permit is not transferable. In the event there is a desire for the facilities to
change ownership or 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. 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. 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_
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 peri-nit as
specified by 15 NCAC 2H .0205 (c)(4).
7. 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.
8. A set of approved documents for the subject project must be retained by the
applicant for the life of the permit.
9. The Permittee, at least six (6) months prior to the expiration of this permit, shall
request its extension. Upon receipt of the request, the Commission will review the
adequacy of the facilities described therein, and if warranted, will extend the permit
for such period of time and under such conditions and limitations as it may deem
appropriate.
10. This permit may be modified, or revoked and reissued to incorporate any
conditions, limitations and monitoring requirements the Division of Environmental
Management deems necessary in order to adequately protect the environment and
public health,
1u

Permit issued this the 20th day of May, 1991
TH CAROLINA EN-VIR
eorge T. Ever t, Nrec
Division of Env ment
By Authority of the
AL MANAGEMENT COMMISSION
Management Commission
n.

Permit No. WQ0004759
May 20, 1991
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the
project,
Project Name
Location
for the
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the
observation of the construction such that the construction was observed to be built within Substantial
compliance and intent of the approved plans and specifications.
Signature
Date
Registration
7

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(40)Sand c Media Filters. A polish€ng process by which affluent limits are achieved through
further radL )f suspended soNds:(a)low rate -- gravity, hydraulically loaded I'Mor with loading
rates in the one to three gpm/sf range;(b)tiigh rate -- a press hydraulically loaded filter with loading
rates In the flue gpmrsf range; At any rate, the loading rate will exceed three gpmisf;
(41)Socondary Clarifiers. A lank which follows the biological unit of a treatment plant and which has
the purpose of removing sludgo associalod with the biological treatment units;
(42)Separate Sludge Reauration. A pan of the contact stabilization process where the activated sludge
Is transferred to a lank and aerated before returning It to the basln;
(43)Seplic Tank. A single -story settling lank In which soliled sludge Is in contact with the waslewalor
flowing through the lank; shall not be applicable for soplic lank systems serving
less which discharge to a nitrification field;
(44)Sludgs Digestion. The process by which organlc or volatile matter and sludge Is gasified, liquefied,
mIneraiized or converted info more stable organlc matter through the activity of living organisms,
which includes aerated holding lanks;
(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.Elutrialion. A process of sludge conditioning in which certain consliluenfs are removed by
succasslva washings with fresh water or plant offtuenl;
(47)Siudge Gas utilization. The process of using sewage gas for the purpose of healing buildings,
driving engines, otc.;
(48)Sludga Holding lank (Aoraiad and Nonaar;uad). A lank ulillzod for small wastewater lroatmonl
plants not eonlalnlng a digo4wr in which sludgy may bo kept fresh, and supornatant wllitdrawn prior to
a drying method (i.e. sludge drying beds); -rhls may be done by adding a small amount of air simply io
keep the sludge fresh, but net necessarily an amounl that would be required to achieve stabilization of
organic matter. A nonaeraled tank would simply be used to decant sludge prior to dewatoring and would
simply be used to decant sludge prior to dewatering and would not allow long periods (several days of
datenlion) without resulting odor problems;
(49)Sludge Incinerators. A furnace designed io burn sludge and to remove all moisture and combustible
materials and reduce the sludge to a sterile ash;
(50)Sludgo Stabillzatlan (Chomlcal or Thermal). A process to make lraalod sludge loss odorous and
putrescr€blo, and to reduce the palhogonic organism content; This may be done by pH adjustment
chlorine dosing, or by heal Irlaalmil
(51)Sludge Thickener, A type of sodimaniation tank in which the sludge Is permitted to settle and
thicken through agitation and gravity;
(52)Slabilizalion Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter is
effected by natural Iransfer of oxygen to the water from air (not a polishing pond);
53)Sland-By Power Supply. On site or poriablo electrical generating equipmenl;(54) Slalic Screens.
A stationary screen designed to remove solids including non-biodegradablo particulale (floalable solids,
suspended solids and BOO reduction) from municipal and industrial
wastewater Iraalmoni systems;
(55)Toriiary Treatment. A stage of Irealmenl following secondary which Is primarily for the purpose
of effluent polishing; A settling lagoon or sand or coal filler_ might be employed for this purpose.
(56)Thermal Pollution Control Device. A dsvico providing for the transfer of heal from a fluid flowing
in tubes to another fluid outside the tubes, or vice varsa: or, other means of rogulaling
liquid lemparatures;
(57)Thermai Sludge Condilionar, A conditioning process by which heal is added for a protracted period
of time to Improve [he dowalumbllhy of sludgo by the solublllzing and hydraullzing of Iho smaller and
more highly hydrated sludge partictos;
(58)Toxlc Materials. Those wastes or combinations of wastes Including disease-caysing 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, cantor, genetic mutations, physiological malfunctions (including malfunctions
in reproduction) or physicat deformations, in such organisms or their offspring; Toxic materials
include, by way illustration and not limilaiion: lead, cadmium, chromium, mercury, vanadium,
arsenic, zinc, ortho-nflro-chlorebenzone (ONCB polychlorinated biphanyls (PCBs) and dichlorodiphanyl
trichloroolhano (DDT): and any other materials that have or may hereafter be determined to have toxic
prooerlies:
{sg)Trickfing inter. A bWoglcaf troalmont unit consisting of material such as broken slono or rock
over which waslowalar is dlsiribulad; A high rala trlckling filter Is one which is operated m bolwann
10 and 30 mgd per acre. A low rate trickling filler Is one which Is designed to operate at ono Io four
mgd per acre;
(60)7rickling Filler (Packed Tower). A plug flow typo of operation In which wastewater flows down
through successive layers of media or lillrato material; Organic malorial is removed continually b}r
active biological fixed growth in each successive layer. This method may produce 'secondary' •qugl fy
effluent, or may be adapted to produce a nitrified effluent;
(61)Vacuum Filters, Centrifuges, or Filler Presses, Devices which are designed to remove excess
water from either digested or undigested sludge prior to disposal of further
RATING SCALE FOR CLASSIFICATION OF FACILITIES
Name of Plant:T U. • - 15r„ `G
Owner or Contact Person:cia. f t�
Mailing Address: p0V3K '
County, 111/,M I< r T elepitoim"e
—
NPDES Permit No. NC00 Expiration Date:
(ssue Date:
Nondisc. Permit NO. V40_0_ �f 75��1
issue Date: o
Rated ley: �nclsk `z -r
Expiration Dater •7 U 19
Date;
RcviLwed (Train- & Cert.) nOg.. Office_
Reviewed (Train. & Cert.) Central Office
N
Grade
Plant Class: (circle one)
ITEM
Ill IV
POINTS
(1) Industrial Pretreatment Units and/or.
industrial Pretreatment Program
(see definition No. 33)
(2) DE I N 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..........................
20,001 50,000.........................
50,001 -- 100,000..........................
100,001 -- 250,000..........................
250,001 500,000..........................
500,001--1,000,000..........................
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
Design Flow (gpd) :
4
2
3
4
5
8
10

PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens . ........... . ................... s
or
(b) Mechanical Screens, Static Screens or
Comminuting Devices _ .... _ ..... 2
(c) Grit Removal ............................... 1
or
(d) Mechanical or Aerated Grit Removal ........... 2
(e) Flow Measuring Device ........ . .............. 1
Dr
(f) Instrumented Flow Measurement .............. 2
(g) Preaerat€on . . . .. . . . .... ..... ...... .. ... . . .. 2
(h)
Influent Flow Equalization ...................
2
(i)
Grease or Oi€ Separators - Gravity ..........
2
Mechanical ..........
3
Dissolved Air Flotation.
8
(j)
Prechlorination ..............................
5
(4) PRIMARY TREATMENT UNITS
(a)
Septic Tank (see definition no. 43) ........... . ..
2
(b)
Imhoff Tank . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .
5
(c)
Primary Clarifiers ............................
5
(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) ......................................
2
(5) SECONDARY TREATMENT UNITS
(a)
Carbonaceous 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
I'rickling filter
High Rate ...................
7
Standard Rate . . .............
5
Packed Tower ...............
5
(iii) Biological Aerated Filter or Aerated
Biological Filter ......................
1 0
(iv) Aerated Lagoons ..................... .
1 0
(v) Rotating Biological Contactors ..........
1 0
uom wnicn mere is no alscnargo to Ina svriace walars; suer systoms snail carry a r­i;.r:...-
points regardless of pumping faeflides or any o€her appurtenances;
(12)Combined Removal of Carbonaceous BOD and Nilrogenous Rnmov.' 'lilrification - A single stage
system 'designed- to achieve "advanced' permit effluent timiis on B ammonia nitrogen within
the same biological reactor.
(13)Do-chlorinalion. Tha partial or comptale reduction of rnsiduai chlonrtiu'in a liquid'by any chamicaf
or physical pmcnss;
(14)Donitrificalion Process. T1ia conversion of nilrale-nitrogan to nitrogen gas;
(15)Etoctrod ialysis. Process for removing ionized sails Irom water through the use of ion'-solective
ion -exchange membranes; 4
(16)Fi€!er Press. A process operated mechanically for partially dewalering sludge;
(17)Foam Separation. The planned lrolhing of wastewater w wastewater effluent as a means of
removing excessive amounts of detergent materials through the introduction of air in 1ha form of fine
bubblas; also cal?ed foam fractionation;
(18)Grk Removal. The process of removing grit and other heavy mineral mailer from wasiawater,
(19)lmholf Tank. A deep Iwo story wastewater lank consisting of an uppor sedimentation chamber and
a lowor sludge digestion chamber;
(20)Inslnimented Flow Measurement. A device which indica€es and/or records rate of flow;
(21)1on Exchange. A chemical process in which ions from two diffarenl molecules are exchanged;
(22)t.and application: (a) Sludge Disposal. A final eudgo disposal method by which sludge may be
applied to land either by spraying on the surface or by subsurface injection (i.e., chisel p(ow); [not
applicable for types of sludge doscribod in (11) of this Rule]; (b)Treated Effluent. The process of
spraying vealad waslawalor onto a land area or olhor methods of application of wastewater onto a
land area as a moans of final disposal and/or Irealmoni;
(23)Micros era on, A low spoed• continuously back�washod, rolaiing drum filter operating under
gravity conditions as a polishing method removing suspended solids from offluon(;
(24)Nilrification Process. The biochemical conversion at unoxidizod nilrogon (ammonia and organic
nitrogen) to oxidized nitrogen (usually nllrate);
(25)Nilrogenous Stage, A separate stage of wassawalar treatment designed for the specific purpose of
converting ammonia nitrogen to nitrate nitrogen;
(25)Phosphate Removal Biological. The removal of phosphorus from wastewater by an oxicianoxic
process designed to enhance luxury uptake of.phosphcrus by Iho micreorgarCsms;
(27)Polishing Pond. A holding pond following secondary treatment with sufficient detention to allow for
the sellling of finely suspended solids;
(26)Posl Aeration, Aeration following convontional secondary traaimoni units to increase effluent 0.0.
or for any other purpose;
(29)Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by
a nonmachanical, gravity moans of flowing down a series or slaps or weirs; Thu flew occurring across
the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operalor
adiusimonl; thus, zero points are assigned even though this is an ossonGal stop lo'moeling the limits of
Iho discharge permit;
(30)Pewdarod or Granular Aclivalod Carbon Fnnd. A biophysical carbon process thnl utilizes biological
activity and organic absorption by using powdered or granular aclivatod carbon; Virgin and/or
regenerated carbon is feed conlrOed into the syslom;
(31)Proaeralion. A lank constructed to provide aeration prior to primary treatmom.
(32)Proliminary UnRs. Unit operations in [he treatment process, such as screening and .comminviion.
that prepare the liquor for subsequenl major operations;
(33)lndusirial Pretreatment: (a)Pre•Iroatmeni Unit, Industrial. The conditioning of a waste at its
source before discharge, to remove or to neu(raliza subs(ancos injurious to sewers and IroalmeAl
processes or to affect a partial reduction in load on a trommnm procn.9 which is operated by Iho same
govntninq body ;i;. the wruamvatuf lraalfnonl plaril hainrj r.I<1111, {!!]I'cn hnaln=rznl 11rrxlr4111, 106U51f Lil -
must be a stale or EPA required program to rncoivo points on the ra.ing sheet;
(34)Primary Clariliars- The first sodding tanks through which was✓towalar is passed in a'lroatmoal
Works for the purpose of rarnoving sotiloabte and suspended solids .and 000 which Is associalod w4h She
solids:
(35)Pumps. All influent, offluonl, and in -plant pumps;
(36)Radialion. Disinfection and/or sleritizaiion process utilizing dovicos emitting utr,aviolot or aamma
(37)Reverso Osmosis. A treatment process in whien a heavy contaminated liquid is pressurized
through a membrane forming nearly puro liquid Iroo from suspondod solids;
(38)Rolafinq Biological Contactors. A fixod biological grovrlh process in which wastewater flows
through tanks in which a series of partially submerged circular surfaces are related;
(39)Sand Fillers;(a)lntermillant Biological. Filtralion of effluent Wowing septic ranks, lagoons, or
some other treatment process in which further biodecompos€lion is expected to produce desired
offluenis; Hydraulic loading rates on lhoso fillers are compwad in gpolac and have a resulting low
gpmisf (loss Shan one); (b)Recirculaling biological • She same lypo of sand filter as defined in (a) with
tho added capability io rocycto ollluenl back through the sand fillor:

(e) Electrodialysis . . .................... . ...... .
(f) Foam Separation ........ I ................... .
(9) Ion Exchange ................................
(h) Land Application of Treated Effluent
(see definition no. 22b) (not applicable for
sand, gravel, stone and other similar mining
operations)
(i) on agriculturally managed sites (See def.
No.4)...................................
(i i) by high rate infiltration on non -agriculturally
managed sites (includes rotary distributors
and similar fixed nozzle systems) .......... .
(iii) by subsurface disposal (includes low pressure
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) .............................
(i) Microscreens..................................
(j) Phosphorus Removal by Biological Processes
(See def. No. 26) ........... .
(k) Polishing Ponds - without aeration ... , .. .
with aeration ......... .
(1) Post Aeration - cascade ..............
diffused or mechanical . . .
(m) Reverse Osmosis ...............................
(n) Sand or Mixed -Media Filters - low rate ........ _ . .
high rate ..........
(o) Treatment processes for removal of metal or
cyanide....................................
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ........ .
(7) SLUDGE TREATMENT
5
5
5
10
4
4
5
20
2
5
0
5
5
2
5
15
15
(a)
Sludge Digestion Tank - Heated ...............
1 0
Aerobic ...............
5
Unheated . , . , .. .....
3
(b)
Sludge Stabilization (chemical or thermal) . ......
(c)
Sludge Drying Beds - Gravity .................
2
Vacuum Assisted .......
5
(d)
SlurIgn 1=I1[I11n0inn . .. . ....... . .........
5
(e)
Sludge C;ondiUoriur (cliumical of tleurinal) .. . . . .
(f)
Sludge Thickener (gravity) ......................
5
(g)
Dissolved Air Flotation Unit
(not applicable to a unit rates as (3) (i) .........
8
(h)
Sludge Gas Utiiization (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 dewatering devices ....................
10
(8) 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 .. . i 0
-by Contracting to a Innd 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
(9) DISINFECTION
(a) Chlorination ..............................
5
(b) Dechlorination .............. . .........
5
(c) Ozone ..............................
5.
(d) Radiation . .........................
5
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(not applicable to chemical additions rated as item
(3) (j), (5) (a) (xi), (5) (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
(sioi ;ippiir:;thl[: In ;:Iclrlgn hnGin .
inherent in land application systems .......................................
5
(d) Pumps.....................................................................................................
3
(e) Stand -By Power Supply..................................................................
3
(f) Thermal Pollution Control Device .............................................
3

TOTAL POINTS
CLASSIFICATION
ClassI ........................................................... 5 - 25 Point
Class .... ............ ............... ..I....................... 2r;_ 50 Points
Class[It ...................................................... 51- 65 Points
ClassIV ........................................................ 66- Up Points
Facilities having a rating of one through four points, inclusive,
do not require a certified operator. Classification of all other
facilities requires a comparable grade operator in responsible
charge.
Facilities having an activated sludge process will be assigned
a minimum classification of Class II.
Facilities having treatment processes for the removal of metal
or cyanide will be assigned a minimum classification of Class [I.
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class'
Ill.
DEFINITION$
(t)Activaled Carbon Beds. A physicaltchomical method for reducing soluble organic material from
wastewater elfluant; the column -type beds used in this method will have a flow rate varying from Iwo
to eight gallons per minute per square fool and may be either upftow or downllow carbon beds. Carbon
may or may not be regenerated on the wastowatar treatment plans silo.
(2)Aaraled Lagoons. A basin in which all solids are maintained in suspension and by which biological
oxidalion or organic matter is reduced through artificially accelerated transfer of oxygen on a flow -
through basis;
(3)Aaration. A process of bringing about intimate contact between air or high purity oxygen In a liquid
by spraying, agitation dillus)on;
(4)Agriculturally managod silo. Any silo On which a crop is produced, managnd, and harvastrW (Crnp
Includes grasses, grains, Iroos, etc);
(5)Air Stripping. A process by which lho arnmonlurn ion is first cunvorkud to dissolved ammonia (pl•i
adjustment) with the ammonia then roloasod to the atmosphere by physical means; or other similar
processes which remove petroleum products such as benzene, toluene, and xylono.
(6)Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provido
extremely high lemperaluras which volalilize and oxidize the absorbed impurities;
(7)CarbcNacsous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent
limils.
(S)CentIIluge. A mechanical device in which centrifugal forco is used to separate solids from liquids
andlor in separate liquids of differonl densities;
(9)Chamical Addition Systems - The addition of chemical (s) to wastawater at an application point for
purposes of improving solids removal, pH adjustment, alkalinity control, etc.; the capability to
axperiment with diilorent chemicals and dilloronk application points to achieve a specific result wilr be
conslderod one system; the capability to add chemical (s) to dual units will be rated as ono system;
'capability to add a chemical at difforence application points for different purposes will result -in the
systems being rate as separate system. I
(10)Chemical Sludge Conditioning. The addition of a chemical compound such as lime, ferric chloride, or
a polymer to wol sludge to coalesce 1he mass orior to its application to a dewalering device;
f (vi)
Sand Filters -
intermittent biological .. . . .
'.
recirculating biological . .. ..
3
(vii) Stabilization Lagoons ...................
5
(viii)Clarifier ..............................
5
(ix)
Single stage system for combined
carbonaceous removal of SOD 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 SOD
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 ...........
Q
Mechanical Air System (fixed,
floating, or rotor) ... ... ......
8
Separate Sludge Reaeration .....
3
(ii)
Trickling Filter -
High Rate ...............
7
Standard Rate ............
5
Packed Tower............
5
(i i i)
Biological Aerated Filter or Aerated
Biological Filter .........................
1 0
(iv)
Rotating Biological Contactors ............
10
(v)
Sand Filter -
intermittent biological ... . ....
2
recirculating biological ........
3
(vi)
Clarifier ................................
5
(6) T;1 n'I'JAI1Y 01i ADVANCED TRI_ATMLW 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 ...................
is
(c) Air Stripping .............................
5
(d) Denitrification Process (separate process) . . . . .
10