WQ0006785_Final Permit_19920930

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary
September 30, 1992
Mr. Frank R. Cope, Town Administrator
Town of Murfreesboro
Post Office Box 6
Murfreesboro, North Carolina 27855
A. Preston Howard, Jr., PE..
Acting Director
Subject: Permit No. WQ0006785
Town of Murfreesboro
Wastewater Treatment Facilities
Wastewater Spray Irrigation
Hertford County
Dear Mr. Cope:
In accordance with your application received July 23, 1992, we are forwarding herewith Permit
No. WQ0006785 dated September 30, 1992, to Town of Murfreesboro for the continued operation of the
subject wastewater treatment facilities and spray irrigation disposal system.
This permit shall be effective from the date of issuance until September 30, 1997, 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. Issuance of this
permit hercby voids Pen -nit No. 7814R issued March 10, 1988.
If any parts, requirements, or limitations contained in tl is permit are unacceptable to you, you haY e
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.
Regional Offices
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/5714700 919/946-6481 919/395-39W 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Aff►rmadve Action Employer

If you need additional information concerning this matter, please contact John Seymour at 919/
733-5083.
cc: Hertford County Health Department
Washington Regional Office, Water Quality
Washington Regional Office, Groundwater
Groundwater Section, Jack Floyd
Training and Certification Unit
Facilities Assessment Unit

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SPRAY IRRIGATION SYSTEM 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 Murfreesboro
Hertford County
FOR THE
continued operation of a 476,000 GPD wastewater collection and treatment spray irrigation disposal
system consisting of approximately 1,234 linear feet of 12 inch gravity sewers, two lagoons in series with
an approximate volume of 16.66 MG, a bar screen, dual grit chambers, a parshall flume with flow
recording, dual 825 GPM influent screw pumps, post chlorination, dual 1,200 GPM spray irrigation
pumps approximately 7,600 linear feet of 12 inch force main, approximately 77 acres of wetted spray
irrigation area, standby power generation, and all other appurtenances to serve the Town of Murfreesboro
with no discharge of wastes to the surface waters, pursuant to the application received July 23, 1992, 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 September 30, 1997, and shall be
subject to the following specified conditions and limitations:
I. PERFORMANCE STANDARDS
1. The spray irrigation facilities shall be effectively maintained and operated -at all times so
that there is no discharge to the surface waters, nor any contamination of ground waters
which will render them unsatisfactory for normal use. In the event that the facilities fail to
perform satisfactorily, including the creation of nuisance conditions or failure of the
irrigation area to adequately absorb the wastewater, the Permittee shall take such immediate
corrective action to correct the problem, including actions as may be required by the
Division of Environmental Management.
2. 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.
3. The sludge generated from these treatment facilities must be disposed of in accordance with
General Statute 143-215.1 ,and in a manner approved by the North Carolina Division of
Environmental Management.

4. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
5. The following buffers shall be maintained:
a) 400 feet between wetted area and any residence or places of public assembly under
separate ownership,
b) 150 feet between wetted area and property lines,
c) 100 feet between wetted area and wells,
d) 100 feet between wetted area and drainageways or surface water bodies,
e) 50 feet between wetted area and public right of ways,
f) 100 feet between wastewater treatment units and wells,
g) 50 feet between wastewater treatment units and property lines.
Some of the buffers specified above may not have been included in previous permits for
this waste treatment and disposal system. These buffers are not intended to prohibit or
prevent modifications, which are required by the Division, to improve performance of the
existing treatment facility. These buffers do, however, apply to modifications of the
treatment and disposal facilities which are for the purpose of increasing the flow that is
tributary to the facility. These buffers do apply to any expansion or modification of the
spray irrigation areas and apply in instances in which the sale of property would cause any
of the buffers now complied with, for the treatment and disposal facilities, to be violated.
The applicant is advised that any modifications to the existing facilities will require a permit
modification.
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of
the wastewater treatment facilities. The operator must hold a certificate of the type and
grade at least equivalent to or greater than the classification assigned to the wastewater
treatment facilities by the Certification Commission. The Perznitwe must also employ a
certified back-up operator of the appropriate type and grade to comply with the conditions
of Title 15A, Chapter $A, .0202. The ORC of the facility must visit each Class I facility at
least weekly and each Class II, III, and IV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A, .0202.
3. A suitable vegetative cover over the spray fields shall be maintained.
4. Irrigation shall not be performed during inclement weather or when the ground is in a
condition that will cause runoff.
5. Adequate measures shall be taken to prevent wastewater runoff from the spray field.
6. 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.
7. The average annual weekly application rate shall not exceed 1.84 inches per acre.
8. No type of wastewater other than that from Town of Murfreesboro Wastewater Treatment
Plant shall be sprayed onto the irrigation area.
2

9. No traffic or equipment shall be allowed on the disposal area except while installation
occurs or while normal maintenance is being performed.
10. Public access to the land application sites shall be controlled during active site use. Such
controls may include the posting of signs showing the activities being conducted at each
site.
11. No root or leaf crops for public consumption shall be raised on the spray sites.
12. Freeboard in the lagoons shall not be less than 1.5 feet at any time.
Any monitoring (including groundwater, surface water, soil or plant tissue analyses)
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 shall be maintained by the Permittee tracking the amount of wastewater
disposed. These records shall include, but are not necessarily limited to the following
information:
a) date of irrigation,
b) volume of wastewater irrigated,
c) field irrigated,
d) length of time field is irrigated,
e) continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for
each field,
f) weather conditions, and
g) maintenance of cover crops.
3. The effluent from the subject facilities shall be monitored by the Permittee at the point prior
to irrigation every March, July, and November for the following parameters:
BODS TS S
Fecal Coliforrm pH
NH3 as N
4. Three copies of all operation and disposal records (as specified in condition Ili 2) and all
effluent monitoring data (as specified in condition 111 3) and any other data as may be
required shall be submitted on or before the last day of the following, month to the
following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
3

5. Noncompliance Notification:
The Permittee shall report by telephone to the Washington Regional Office, telephone no.
919/ 946-6481 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 sludge digester, 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.
C. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-
pass directly to receiving waters without treatment 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.
Within 30 days of permit issuance, a site map showing property boundaries, monitoring
well locations, and spray field location needs to be submitted to the Division of
Environmental management Groundwater Section in Raleigh, North Carolina.
2. The existing monitor wells roust be sampled every March, July, and November for the
following parameters:
NO3 TDS
TOC pH
Ammonia Nitrogen Chloride
Water Level Total Conforms
Volatile Organic Compounds - In November only ( by Method 1-or Method 2
below)
Method 1: Method 6230D ( Capillary - Column), "Standard Methods for the
Examination of Water and Wastewater", 17th edition, 1989
Method 2: Method 502.2 " Methods for the Determination of Organic Compounds
in Drinking Water", United States Environmental Protection Agency -
600/4-88/039
The measurement of water level must be made prior to sampling for the remaining
parameters.
M

The measuring points (top of well casing) of all monitoring wells shall be surveyed to
provide relative elevations of the measuring point for each of the monitoring wells. The
depth of water in each well shall be measured from the surveyed point on the top of the
casing.
If TOC concentrations greater than 10 mg/1 are detected in any downgradient monitoring
well, additional sampling and analysis must be conducted to identify the individual
constituents comprising this TOC concentration. If the TOC concentration as measured in
the backerround monitor well exceeds 10 mg/i, this concentration will be taken to represent
the naturally occurring TOC concentration. Any exceedances of this naturally occurring
TOC concentration in the downgradient wells shall be subject to the additional sampling
and analysis as described above.
If any volatile organic compounds are detected by method 6230D, or the equivalent method
502.2, then EPA methods 604 and 611 must also be run to detect other organic compounds
which may be present. The results of all analysis specified in the monitoring requirements,
including 604 and 611 if required, must be submitted simultaneously.
The results of the sampling and analysis shall be sent to the N.C. Division of
Environmental Management on Form GW-59 (Compliance Monitoring Report Form) every
April, August, and December.
2. The Co=lignce BoundgEy for the disposal system is specified by regulations in 15 NCAC
2L, Classifications and Water Quality Standards applicable to the groundwater of North
Carolina. An exceedance of Groundwater Quality Standards beyond the Compliance
Boundary is subject to penalty provisions applicable under General Statute 143-215.6A.
The sale of property, by the Permittee, which is within or contiguous to the disposal
system site may alter location of the Compliance Boundary.
For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the lagoons and spray fields or 50 feet within the
property boundary.
If the title to any property which may affect the location of the Compliance Boundary is
changed, the pem- ittee shall notify the Division Director within 14 days. The Director shall
then establish a modified Compliance Boundary which will be done as a modification to the
Permit.
The RE IE BOUNDARY for the disposal system is specified by regulations in 15
NCAC 2L, Groundwater Classifications and Standards. A REVIM BQIMARY 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
B NDARY, 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.
3. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall
be provided.
�1

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.
11211191
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 a desire for the facilities to change
ownership, or there is a name change of the Permittee, a formal permit request must be
submitted to the Division of Environmental Management accompanied by an application
fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may
not be approved.
4. 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 143-215.6A to 143-215.6C.
5. 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.
6. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of the project if available upon issuance of this permit.
7. The annual administering and compliance fee must be paid by the Permittee within thirty
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).
8. The Permittec, 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.
6

9. Issuance of this permit hereby voids Permit No. 7814R issued March 10, 1988.
Permit issued this the 30th day of September, 1992
TH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Freston Ho d,Ar., Acting Director
Division of Enviro en agement
By Authority of the EnviroWbental Management Commission
Permit Number WQ0006785
7

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MATING SCALE FOR CLASSIFICATION OF FACILITIES
Name of Plant: % e-ees6oro W. c.J 1 f,
Owner or Contact Person: ErE. k - C-Cuag
Mailing Address: --
County:
Telephone:
NPDES Permit No. NCCO Nond'i,sc. Per. No. JAJW ` C066 6 >
IssueDate: arc-. S Expiration Date: M,yc4,_ 3!/99Z
Existing Facility New Facility
Rated By: Date: lc..
Reviewed (Train. & Cert.) Reg. Office�1-�
Reviewed (Train. & Cert.) Central Office
ORC 6 Grade _J_ _
Plant Class: (circle one) I I I Ili IV Total Points�36_
ITEM POINTS
(1) Industrial Pretreatment Units and/or
Industrial Pretreatment Program
(see definilion No. 33)
4
(2) DF ! N FLOW OF PLANT IN GPO
(not appiicable to non-contaminaled cooling waters, sludge
handling facilities for water purification plants, totally
closed cycle systems (del. No. 11). and facilities
consisting only of Item (4) (d) or Items (4) (d) and (11)
(d))
o -• 20,000..........................
1
20,00) 50,000..........................
2
50,001 -- 100,000 .................... I .... -
3
100,001 - 250.000..........................
4
250,001 -- 500,000..........................
500,001--1,000,000..........................
1,000,001 -- 2,000,000 ..................... 1 ..
10
2,000,001 -(and up) - rate 1 point additional for each
200,000 gpd capacity up to a
maximum of 30
Design Flow (gpd)
(3) PRELIMINARY UNITS (see definition no. 32)
(a) Bar screens ........
1
o r,
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........... .............
(c) Grit Removal ...............................
or
(d) Mechanical or Aerated Grit Removal ...........
2
(e) Flow Measuring Device .......................
1
or.
(I) Instrumented Flow Measurement ..............
(g) Preaeralion ....................... . ........
2
(h) Influent Flow -Equalization ...................
2
(i) Grease or oil 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) Setlling Ponds or Settling Tanks for inorganic
Non -toxic Materials ysludge handling facilities
for water puriticalion pfanls, sand, gravet,
stone, and other rnining operations except
recreational activities such as gem or gold
mining) .............. 2
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aera6on - High Purity Oxygen System
20
Diffused Air System ....... , .. ,
1 0
Mechanical Air System (fixed,
floating or rotor) ..............
8
Separate Sludge Reaerat€on .....
3
(i i) Trickling Filter
High Rate ...................
7
Standard Rate ...............
5
Packed Tower ...............
5
(i i i) Dialogical Aerated Filter or Aerated
Siolooicai Filter ......................
1 0
(iv) Aerated Lagoons ........ I ....... I .... .
1 0
(v) Rotating Biological Contactors ..........
1 0
(vi) Sand Filters -
intern. ittenl biological .....
2
recirculating biological .....
3
(vii) 5labiftation Lagoons ...................
0 '
(viii)Clarifier ..............................
5
(ix) Single stage system for combined
i
carbonaceous removal of BOD and
t
nitrogenous removal by nitrification
(see del. No. 12) (Points for this item
have to be in addition lq_ items (5) (a)
j
(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 ...........
10
Mechanical Air System (axed,
floating, or (otor) ...... ......
8
Separate Siudge Reaeration .....
3
(i i) Trickling Filler -
High Rate ............ . .
7
Standard Rate ............
5
Packed Tower .............
5
(iii) Biological Aerated Filter or Aerated
Biological Filter .......... . ..............
10
(iv) Rotating Biological Contactors ............
1 D
(v) Sand Filter -
intermittent biological ....... .
2
recirculating biological .... . . . .
3
(vi) Clarilier................................
5

1 IN T N
(I)Activated Carbon Beds. A physic allchemica[ method for reducing soluble organic material from waslewaler
effluent; the column-lype beds used in this method will have a flow rate varying from two to eight gallons per
minute per square foot and may be either upflow cc downflow carbon beds. Carbon may or may not he
regenerated on the waslewater treatment plant site.
(2)Aerated Lagoons. A basin in which all solids are mainlained in• suspension and by which biological oxidation or
organic mailer is reduced through arlificially accelerated transfer of oxygen on a flow -through basis;
(3)Aeration. A process of bringing about inlimala contact between air or high purity oxygen in a liquid by
spraying, agitation diffusion;
(4)Agricullurally managed site. Any site on which'a crop is produced, managed, and harvested (Crop includes
grasses, grains, trees, etc);
(S)Air Stripping. A process by which the ammonium ion is first converted to dissolved ammonia fpH adjustment)
with the ammonia then released to the atmosphere by physical means; or other similar processes which remove
petroleum products such as benzene, toluene, and xylene-
(6)Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high
temperatures which volatilize and oxidize the absorbed 'impurities;
(7)Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent limits.
(B)Cenldfuge. A mechanical device in which centrifugal force is used to separate soiids from liquids and/or to
separate liquids of different densities;
(9)Chemical Addition Systems - The addition of chemical (s) to wastewater al an application point for purposes of
improving solids removal, pH adjustment, alkalinity control, etc-; the capability to experiment with different
chemicals and different application points to achieve a specific result will be considered one system; the
capability to add chemical (s) [o dual units will be rated as one system; capability to add a chemical at difference
application points for different purposes will result in the systems being rate as separate system.
(10)Chemicaf Sludge Conditioning. The addition of a chemical compound such as lime, ierr'rc chloride, or a
polymer to wet sludge to coalesce the mass prior to its application to a dewalering device;
(1 i)Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing
inorganic, non-loxic materials from sand, gravel, crushed stone or other similar operations, from which there is
no discharge to the surface waters; such systems shalt carry a maximum of two points regardless of pumping
facilities or any other appurtenances;
(12)Combined Removal of Carbonaceous DOD and Nitrogenous Removal by Nitrification - A single stage system
'designed' to achieve 'advanced' permi€ effluent limits on DOD and ammonia nitrogen within the same biological
reactor.
(13)De-chlorination. The partial or complete reduc(ion of residual chlorine in a liquid by any chemica{ or physical
process-,
(.14)Denitrificalion Process. The conversion of nitrate-nilrogen to nitrogen gas;
(15)Electrodialysis. Process for removing ionized salts from water through (he use of ion -selective ion -
exchange membranes;
(16)Ffller Press, A process operated mechanically for partially dewalering sludge;
(17)Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing
excessive amounts of detergent'nialerials through the introduction of air in the form of fine bubbles; also called
foam traclionalion;
(IS)Grit Removal. The process of removing grit and other heavy mineral mailer from wastewater:
(19)]mholf Tank. A deep Iwo story wastewater lank consisting of an upper sedimentation chamber and a lower
sludge digestion chamber;
(20)1nstrumented Flow Measurement. A device which indicates and/or records rate of flow;
(21)[on Exchange. A chemical process in which ions from two different molecules are exchanged;
(22)Land application_ (a) Sludge Disposal. A Tina€ sludge disposal method by which sludge may be applied to land
either by spraying on the surface or by subsurface injection (i.e., chisel plow); Inol
appncaoie for types Of sludge described in (11) of this Rule]; (b)Treated Ellfuent. The process of sprayins
treated wastewater onto a land area or other methods of application of wastewater onto a land area as a means
of final disposal and/or treatment;
(23)Microscreen. A low speed, continuously back -washed, rotating drum filler operating under gravity
conditions as a polishing method removing suspended solids from effluent;
(24)Nilrilicalion Process, The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) tc
oxidized nitrogen (usually nilrale);
(25)Nileogenous Stage. A separate stage or wastewater treatment designed for the specific purpose of
converting ammonia nilrogen to nitrale nitrogen;
(26)Phosphale Removal Biological. The removal of phosphorus from waslewaler by an oxiclanoxic process
designed to enhance luxury uptake of phosphorus by the microorganisms;
(27)Polishing Pond, A holding pond following secondary €realrnenl with sulficient detention Io aliow for the
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 Iho cascade requires no operator adjustment; thus, zero
points are assigned even though this is an essential slap to meeting the limits of the discharge permit;
(3o)Powdered or Granular Activated Carbon Feed-.- A biophysical carbon process that utilizes biological activity
and organic absorption by using powdered or granular activated carbon; Virgin and/or regenerated carbon is feed
controlled into the system;
(31)Preaeradon. A tank constructed 10 provide aeration prior to primary treatment;
(32)Preliminary Units. Unit operations fn the treatment process, such as screening and comminution, that
prepare the liquor for subsequent major operations;
(33)Indus[rial 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 (o effect a
partial reduction in load on a treatment process which is operated by the same noverninn Fhnriv s�,a

;} TEEiTIARY OR ADVANCED TREATMENT UNIT
{a) Activated Carbons Beds -
without carbon regeneration .................. 5
with carbon regeneration .................... 1 5
(b) powdered or Granular Activated Carbon Feed -
A without carbon regeneration ............... 5
with carbon regeneration ............. . ...... 1 5
(c) Air Stripping ....................... '.. , ... 5
(d) Denitrillcation Process (separate process) . . . 1 0
(e) Electrodialysis ....................... ...... 5
(f) Foam Separation ............................. 5
(9) Ion Exchange ................................ 5
(h) Land Application of Treated Effluent
(see definition no. 22b) (not applicable for
sand, gravel, stone -and other similar mining
operations)
W on agricuilurally managed sites (See clef.
No.4)1 0
...................................
(fi) by high rate infiilralion on non -agriculturally
managed sites {includes rotary distributors
and similar fixed nozzle systems) ........... 4
(iii) by subsurface disposal (includes low pressure
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) ............................. 4
(i) Micro -screens .................................. 5
{j} Phosphorus Remotal by Biological Processes
(See def, No. 26) .................... 20
(k) Polishing Ponds without aeration .... I . 2
ev'ilh aeration .......... 5
(1) Post Aeration - cascade .............. 0
diffused or mechanical . , . 5
(m) Reverse Osmosis ............................... 5
(n) Sand or Mixed -Media Fillers - low rate ........... 2
high rate .......... 5
(o) Treatment processes for removal of metal or
cyanide_... ................................ 1 5
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ........ 1 5
SLU DG E TR EATM ENT
10
(a) Sludge Digestion Tank - Heated ...............
Aerobic ......... - - - . - -
5
Unheated ...... ... . . . .
3
(b) Sludge Stabilization (chemical or thermal) .... . . .
5
(c) Sludge Drying Beds - Gravity .................
2
Vacuum Assisted .......
5
(d) Sludge Elutrialion .............................
5
5
(e) Sludge Conditioner (chemical or thermal) ........
f Sludge T hickener (gravity)
5
(g) Dissolved Air Flotation Unit
(not applicable to a unit rates as (3) (i) .........
6
(h) Sludge Gas Utilization (including gas storage) - - . -
5
(i)- Sludge Holding Tank - Aerated ...............
2
Non -aerated ............
{j) Sludge lacineralor - (not including activated
carbon regeneration) .....
10
(k) Vacuum Fifter, Centrifuge or Filler Press or other
similar dewalering devices ................ • - . -
1 0
(S) SLUDGE DISPOSAL (including incinerated ash)
Lagoons ..................
(b) Land Application (surface and subsurface)
2(a)
(see definition 22a)
-where the facility holds the land app. per _
1 0
-by contracting to a land application operator who
holds the land application permit ..............• .
• 2-
-land application of sludge by a contractor who does
not ho!d the permit for the wastewater treatment
facility where the sludge is generated ...... .
1 0
(c) Landfilled (burial) ........................... _ ..
5
(9) DISINFECTION
5
(a) Chlorination ...... . ................. ... • .
5
(b) Dechloririalion ...........
5
(c) Ozone ................... ..........
5
(d) Radiation ..........................
(10)-CHi=MICAL ADDITION SYSTEM (S) (See definition No. 9)
(not applicable to chemical additions rated as item
(3) (j), (5) (a) (xi), (6) (a), (6) (b), (7) (b), (7) (e),
(9) (a). (9) (b). or .(B) (c) 5 points each: List:
(1 1) MISCELLANEOUS UNITS
(a) }folding 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 dour. stic wastewater ..........
(b) Effluent Flow Equalization (not applicable to storage
basins which are inherent in land application syslems).
(c) Stage Discharge (not applicable to storage basins
inherent in land application systems .......................................
(d) Pumps ........ .:........................ ............................ .............................. ......
(e) Stand -By Power Supply.................................................................. {
(0 Thermal Pollution Control Device .............................................
TOTAL POINTS
CLASSIFICATION
Classt.......................:................................... 5 - 25 Points
Class 11........................................................ 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 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 11.
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class
III.
In -plant processes and related control equipment which are an
integraf part of -industrial production shall not be considered waste
treatment. Likewise, discharges of wastewater from residences
having a design flow of 1,000 gpd or less, shall not hp subject to
rating.
ADDITIONAL QMMENT
Uw�r l jjoU3 XC-S ti"_S
1JQ�!^ FC.-LS�CJ

(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. Disinfeclion andlor steril-izalion process utilizing devices nmilling ultraviolet or gamma rays;
(37)Reverse Osmosis. A treatment process in which a heavy conlam;naled liquid is pressurized through a
membrane forming nearly pure liquid free from suspended Wids;
(38)Rolating Biological Conlaclors. 'A fixed biological growth process in which wastewater flows through tanks
in which a series of partially submerged circular surfaces are rotated;
(39)Sand Fitters:(a)lntermiltenl Biological- Filtration of ellluent following septic tanks, lagoons, or some other
treatment process in which further biodecomposition is expected to produce desired effluents; Hydraulic loading
tales on these fillers are computed in gpd/ac and have a resulting low gpmisl (less than one); (b)Recirculating
biological - the same type of sand filter as `-- lined in (a) with the added capability to recycle effluent back
through the sand filler;
(40)Sand or Mixed -Media Filters. A polishing process by which effluent limits are achieved through a further
reduction of suspended solids:(a)low rate -- gravity, hydraul;cally loaded filter with loading rates in the one to
three gpm/sf range;(b)high rate -- a press hydraulically loaded filter with loading rates in the five gpmisf
range; Al any tale, the loading rate will exceed three gpmtsf;
(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 biological treatment units;
(42)Separale Sludge Reaeration. A part of the contact stabilization process 'where the activated sludge is
lransfermd to a tank and aerated before returning it to the basin;
(43)Septic Tank. A single -story spilling lank in which settled studgo is in contact with the waslewaler flowing
through the tank; shall not be applicable for septic lank systems serving single family residences having a
capacity of 2000 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
aeraled 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 Eluinalion. A process of sludge conditioning in which certain cons€iluenls are removed by successive
washings with fresh water or plant effluent;
(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 Nonaeraled}. 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 simply be used to decant sludge prior to
dewalering 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;
(50)Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and pulrescrible,
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 lank 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 lransler of oxygen to the water from air (not a polishing pond);
(S3)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 soiids and SOD reduction) from municipal and industrial wastewater trealmeal
systems;
(55)Terliary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent
polishing; A settling lagoon or sand or coal filter might be employed for this purpose.
(56)Thermal Pollution Control Device. A device providing for the transfer of heat from a.ffuid flowing in tubes to
another fluid outside the lubes, 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 Ie
improve the dewalorabilily of sludge by the solubilizing 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, geriedc mutations, physiological malfunctions (including malfunctions in reproduction) or physical
deformations, in such organisms or their offspring; Toxic materials include, by way illustration and not
limitation; lead, cadmium, chromium, mercury, vanadium, arsenic, zinc, ortho-nitro-chlorebenzene. {ONCE
polychlorinated biphanyls (PCBs) and dichiorodiphonyf Irichloroethane (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 material such as broken stone or rock over which
wastewater is distributed; A high rate trickling filter is one which is operated at between 10 and 36 mgd per
acre. A low rate trickling filler is one which is designed to operate at one to four mgd per acre;
{8o)Trickiing Filler (Packed Tower). A plug flow type of operation in which wastewater flows dawn through
successive layers of media or filtrate material; Organic material is removed continually by active bio€ogical
fixed growth in each successive layer. This method may produce -secondary' quality effluent, or may be
adapled to produce a nittified effluent;
(61)Vacuem Fillers, Cenlrifuges, or Filler Presses. Devices which are designed to remove excess water from
either digested or undigested sludge prior to disposal or further treatment.