WQ0005945_Final Permit_19920331

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
March 31, 1992
Mr. Thomas Davis, Acting Superintendent
Carteret County Board of Education
Post Office Drawer 600
Beaufort, North Carolina 28516
Subject: Permit No. WQ0005945
Carteret County Schools
Broad Creek Middle School
(Formerly Croatan Middle School)
Subsurface Disposal System
Carteret County
Dear Mr. Davis:
In accordance with your application received December 16, 1991 we are forwarding herewith
Permit No. WQ0005945 dated March 31, 1992 to Carteret County Board of Education for the continued
operation of a 13,075 GPD low pressure pipe subsurface wastewater disposal system.
This permit shall be effective from the date of issuance until March 31, 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 hereby
voids Permit No. 14859 issued July 17, 1987.
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 t50B 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 919/571-4700 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

If you need additional information concerning this matter, please contact Mr. John Seymour at 919/
733-5083.
Sincerely, k -J
0 1
George T.Vverett
cc: Carteret County Health Department
Wilmington Regional Office, Water Quality
Wilmington 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
SUBSURFACE DISPOSAL 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
Carteret County Board of Education
Carteret County
FOR THE
continued operation of a 13,075 GPD subsurface wastewater disposal system consisting of two 1,500
gallon grease traps connected in series to the kitchen drain; an 11,418 gallon capacity baffled septic tank
with a 2,479 gallon capacity pump chamber, dual 120 GPM dosing pumps and high-water alarms; an LPP
subsurface disposal system with four (4) drain fields covering a total area of approximately 30,500 square
feet; and all related piping, valves, fittings, and appurtenances to serve Broad Creek Middle School
(formerly Croatan Middle School) with no discharge of wastes to the surface waters, pursuant to the
application received December 16, 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 March 31, 1997 and shall be subject to
the following specified conditions and limitations:
PERFORMANCE STANDARDS
1. In the event that the facilities fail to perform 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.
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. 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.
4. Adequate measures shall be taken to divert stormwater from the disposal area and prevent
wastewater runoff from the subsurface disposal field.
5. 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.

6. A usable green area shall be maintained for wastewater disposal. The green area shall have
the capability of accommodating the average daily flow of the facility being served without
exceeding the loading rates of the green area. A "green area" as defined in 15 NCAC 2H
.0404(g)(7) is an area suitable for waste disposal, either in its natural state or which has
been modified by planting a vegetative cover of grasses or low growing shrubbery.
7. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
II. -OPERATION D MAINTENANCE REQUIREMENTS
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 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.
3. The application rates to the disposal field shall not exceed 0.45 gallons/ day/ square foot.
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.
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 LPP field(s) and the field(s) shall be routinely
mowed. The clippings shall be periodically removed to prevent the build-up of thatch.
III. MUNITORING AND REPORTING REUIIIREMENTS
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. This permit is voidable unless the following inspection and maintenance procedures are
followed:
a. The grease traps and septic tanks shall be inspected monthly for grease and sludge
build-up and pumped out as needed, but no less frequently than once per year.
The scum layer shall be removed from the pump chamber when the septic tank is
cleaned.
b. A permanent record of inspections and maintenance shall be kept and made
available upon request to the Division of Environmental Management.
2

3. The low pressure lines shall be maintained as necessary (including purging of the lines and
pressure testing) in order to ensure that they remain free of obstructing materials and that
the pressure head on the laterals remains within the design specifications. The highest and
lowest laterals on each subfield shall be checked (and adjusted as necessary) annually to
ensure that the pressure heads are within the approved specifications. If adjustments are
necessary to the highest and lowest laterals, the remaining laterals in that subfield shall also
be checked and adjusted to the approved specifications. 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 highest and
lowest lateral on each subfield Annually
4. Three copies of all operation and maintenance records (as specified in condition III 2) and
all effluent monitoring data (as specified in condition III 3) 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
5. 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.
6. Noncom liance Notification:
The Permittee shall report by telephone to the Wilmington Regional Office, telephone no.
919/ 395-3900 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.
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.
3

1. Within 90 days of permit issuance, one (1) downgradient monitor well must be installed to
monitor groundwater quality. The well shall be constructed such that the water level in the
well is never above or below the screened (open) portion of the well at any time during the
year. The location and construction details for this well must be approved by the
Wilmington Regional Office, from which a well construction permit must be obtained.
2. The one (1), new monitor well, and the three (3) existing monitor wells must be sampled
initially after construction and thereafter every March, July, and November for the
following parameters:
NO3 TDS
NO2 Total Suspended Solids
TOC pH
Ammonia Nitrogen Chloride
Water Level Fecal Coliforms
Orthophosphate
Volatile Organic Compounds - In November only (by Method 1 or Method 2
below)
Method 1: Method 623OD ( 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.
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 back�oun_d monitor well exceeds 10 mg/l, 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.
12

3. The Compliance Boundary delineated on the attached site plan 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 perimeter of the waste disposal field 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 permittee 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 REVIEW BOUNDARY delineated on the attached site map 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.
4. Any additional 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 Perrriittee 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.
5

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. A set of approved plans and specifications for the subject project must be retained by the
applicant for the life of the project.
5. 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).
6. 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.
7. The subject wastewater treatment and disposal facilities shall be connected to an operational
publicly owned wastewater collection system within 180 days of its availability to the
subject facilities, if the subject wastewater treatment or disposal facilities are in
noncompliance with the terms and conditions of this non -discharge permit or the governing
statutes or regulations. Prior to the initiation of these connection activities, appropriate
approval must be received from this Division.
S. The issuance of this permit does not preclude the Permitwe 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.
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. Issuance of this permit hereby voids Permit No. 14859 issued July 17, 1987.
Permit issued this the 31st day of March 1992
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
--aC(�' (�
George T. Ev tt, Director
Division of ErKironmental Management
By Authority of the Environmental Management Commission
Pemnit No. WQ0005945
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SALT FL- LATH VAD

MATING SCALE FOR CLASSIFICATION OF FACILITIES
(34)Primary Clarlfiers. 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 -plan) pumps;
(36)Radialion. Disinfection and/or sterilization process ulitizing devices emitting ultraviolet or gamma rays;
(37)Reverse Osmosis. A treatment process in which a heavy contaminated liquid is pressurized through a
membrane forming nearly pure liquid free from suspended solids;
(38)Rolaling 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 Fillers:(a)lntermitlent Biological. Filtration of effluent following septic tanks, lagoons, or some other
treatment process in which further biodecomposilion is expected to produce desired effluents; Hydraulic loading
rates on these filters are computed in gpd/ac and have a resulting low gpmisf (loss than one); (b)Recirculating
biological - the same type of sand filter as t;ned in (a) with the added capability to recycle effluent back
through the sand filter;
(40)Sand or Mixed -Media Fillers. A polishing process by which effluent limits are achieved through a further
reduction of suspended solids:(a)low rate -• gravity, hydraulically loaded filter with loading rates in the one to
three gp,r/sf range;(b)high rate -- a press hydraulically loaded filter with loading rates in the five gpmisf
range; At any rate, the loading rate will exceed three gpmisf;
(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)Separate Sludge Reaeration. A part o€ the contact stabilization process where the activated sludge is
translerred to a lank and aerated before returning it to the basin;
(43)Septic Tank. A single-slory settling tank in which settled sludge is in contact with the wastewater flowing
through the lank; shall not be applicable for septic tank systems serving single family residences having a
capacity of 2000 gallons or less which discharge to a nitrification field;
t44)Sfudge Digestion. The process by which organic or volatile matter and sludge is gasified, liquefied,
mineralized or converted into more stable organic mailer 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 Eluirialion. A process of sludge conditioning in which certain constituents are removed by successive
washings with fresh water or plant effluent;
(47)Sludge Gas utilization. The process of using sewage gas for the purpose of heating buildings, driving engines,
etc.;
(48)Sludge Holding lank (Aerated and hlonaeraled}. 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)Siudge Incinerators. A furnace designed to burn sludge and to remove all moisture and combustible materials
and reduce the sludge to a sterile ash;
(50)Studge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescrible,
and 10 reduce the pathogenic organism content; This may be done by pH adjustment chlorine dosing, or by heal
treatment;
(51)Sludge Thickener. A type of sedimentation tank in which the sludge is permitted to settle and thicken through
agitation and gravity;
(52)Stabilizalion Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter is effected by
natural transfer of oxygen to the water from air (not a polishing pond);
(53)Stand-By Power Supply. On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids including non -biodegradable particulate
(floalable solids, suspended solids and BOD reduction) from municipal and industrial wastewater treatment
systems;
(55)Tertiary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent
polishing; A settling lagoon or sand or coal filler might be employed for this purpose.
(56)Thermal Pollution Control Device. A device providing for the transfer of heal from a fluid flowing in tubes to
another fluid outside the tubes, or vice versa; or, other means of regulating
liquid temperatures;
(57)Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of time to
improve the dewalerabifity of sludge by The solubilizing and hydraufizing of the smaller and more highly hydrated
sludge particles;
(58)Toxic Materials. Those wastes or combinations of wastes including disease -causing agents which afler
discharge and upon exposure, ingestion, inhalation or assimilation into any organism either directly Irom the
environment or indirectly by ingestion through food chains, wilf cause death, disease, behavioral abnorrnafilies,
cancer, genetic mutations, physiological malfunctions (including malfunctions in reproduction) or physical
deformations, in such organisms or their offspring; Toxic materials include, by way illustration and not
limilakon: lead, cadmium, chromium, mercury, vanadium, arsenic, zinc, orlho-nitro-chlorebenzene (ONCE
polychlorinated biphenyls (PCBs) and dichlorodiphenyl trichloroelhane (DDT); and any other materials that have
or may hereafter be determined to have toxic proporties;
(59)Trickling filler. A biological treatment unit consisting of material such as broken stone or rock over which
wastewater is distribuled; A high rate Irickling filter is one which is operated at between 10 and 30 mgd per
acre. A low rate Irickling filler is one which is designed to operate at one to four mgd per acre;
(60)Trickling Filter (Packed Tower). A plug flow type of operation in which wastewater flows down through
successive layers of media or fillrate material, Organic material is removed continually by active biological
fixed growth in each successive layer. This method may produce 'secondary' quality effluent, or may be
adapted to produce a nilrilied 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 or further treatment.
Name of Plant: _F� iZoA-Z> _ 26GK M 1 D l) L-C S c1-1cQL
Owner or Contact Person: -I—btA —DAvtS
Mailing Address:or— L`tDuco rto rJ
Po �2cAwGt2
--------------_.—._---------- � -------------
----
County: C �r(zi C-2� i Telephone:
NPDES Permit No- NCOO Nondisc. Per. No. W ac)dasa'¢S
IssueDate: f Z`1 Z Expiration Date- `1 rtr ff j 01 3--
Existing Facility rf New Facility
Rated By: P-L Date:
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC Grade
Plant Class: (circle one)
11
111 IV Total Points1S
ITEM POINTS
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(1) Industrial Pretreatment Units and/or
(i)Aeration - High Purity Oxygen System .....
20
Industrial Pretreatment Program
Diffused Air System ...... .
10
(see definition No. 33)
4
, , . ,
Mechanical Air System (fixed,
(2) DESiGN FLOW OF PLANT IN GPD
floating or color) .. . ...........
8
(not applicable to non -contaminated cooling waters, sludge
Separate Sludge Reaeration
3
handling faci.lities for water purification plants, totally
(il) Trickling Filler
closed cycle systems (def. No. 11), and facilities
High Rate ................
7
consisting only of Item (4) (d) or Items (4) (d) and (11)
(d))
Standard Rate ...............
5
0 20,000..........................
1
Packed Tower...............
5
20,001 •- 50,000..........................
2
(iii) Biological Aerated Filler or Aerated
50,001 100.000 ..........................
3
Biological Filter ..............
100,001 -- 250,000 ...... . ...................
4
.
(iv) Aerated Lagoons ........... .....
10
500,001--1,000,000 ............ . .............
8
(v) Rotating Biological Contactors ..........
1 0
1,000.001 -- 2,000,000 ........................
10
2,000,001 (and up) - rate i point additional for each
(v i) Sand Filters-
200,000 gpd capacity up to a
intermittent biological ..
2
maximum of 30 ((}}
Design Flow 3.Q Y]
recirculating biological .. . ..
3
(gpd) 1 _
(vii) Stabilization Lagoons ... , .... .
-5(3)
PRELIWNIARY UNITS (see definition no. 32) r
(viii)Ciarifier ......... .
(a) Bar Screens ................................
1
(ix) Single stage system for combined
or
carbonaceous removal of BOD and
(b) Mechanical Screens, Static Screens or
nitrogenous removal by nitrification
Comminuting Devices ...........
(c) Grit Removal
2
(see def. No. 12) (Points for this item
............................ . ..
1
have to be in addition to items (5) (a)
or
(d) Mechanical or Aerated Grit Removal .... , , .....
2
N through (a) (viii)
{x) Nutrient addditions to enhance BOD
(e) Flow Measuring Device .......................
1
removal .......................
5
or
(1) Instrumented Flow Measurement
2
(xi) Biological Culture ('Super Bugs") addition
..............
(g) Preaeratiorn
2
to enhance organic compound removal .....
5
.......... . . . . . . ................
(b) Nitrogenous Stage
(h) Influent Flow -Equalization
2
(i) Aeration - High Purity Oxygen System ....
20
...................
(i) Grease or Oil Separators - Gravity ..........
(D
Diffused Air System ...........
10
Mechanical Air System (fixed,
Mechanical ..........
3
floating, or rotor) ...... ......
8
Dissolved Air Flotation.
0) Prechlorination
8
Separate Sludge Reaeration .....
3
.......... ..........
5
(ii) Trickling Filter -
High Rate ..... . ........
7
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43)
2
Standard Rate ............
5
..... ........
Packed Tower .. .........
5
(b) lmhoff Tank ..................................
-5
,
(iii) Biological Aerated Filter or Aerated
(c) Primary Clarifiers .................. . .........
5
Biological Filler ...................
10
(d) Settling Ponds or Settling Tanks for Inorganic
(iv) Rotating Biological Conlaclors ...
1 0
Non -toxic Materials (sludge handling facilities
(v) Sand Filter -
for water purification plants, sand, gravel,
intermittent biological
2
stone, and other mining operations except
recirculating bialogica!
3
recreational activities such as gem or gold
NO Clarifier _ ... .
mining) ......................................
2

FNT N
(6) TERTIARY OR ADVANCED TREATMENT UNIT
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
a Activated Carbonss Beds
{) 5
'neration
(not applicable to chemical additions rated as item
..................
without carbonregeneration.
g
(3) (1), (5) (a) (xi), (6) (a), (6) (b), (7) (b), (7) (e),
with carbon regeneration .................... 1 5
(b) Powdered or Granuiar Activated Carbon freed -
(g) (a), (9) (b), or (g) (c) 5 points each: List:
5
without carbon regeneration ........... I . I ... '5
5
with carbon regeneration ... _ ........ .... 15
(c) Air Stripping ......................... 5
(d) Denitrificalion Process (separate process) . . .. . 10
(e) Electrodialysis .............................. 5
(11) € ISCELLANEOUS UNITS
(f) Foam Separation ............................. 5
(a) Holding Ponds, Holding Tanks or Settling Ponds
(g) Ian Exchange ..., ............................. 5
for Organic or Toxic Materials including wastes
(h) Land Application of Treated Effluent
from mining operations containing nitrogen and/or
(see definition no. 22b) (not applicable for
phosphorous compounds in amounts significantly
sand, gravel, stone "and other similar mining
greater than is common for domestic wastewater 4
operations)
(b) Effluent Flow Equalization (not applicable to storage
(i) on a9rictlllurally managed sites (See def,
basins which are inherent in land application systems). 2
No. 4) • . • • • • • • • • • • .... • . • • . • ....... • ..... 10
(c) Stage Discharge (not applicable to storage basins
( €t by high rate infiltration on non -agriculturally
inherent in land application systems ....................................... 5
managed sites (includes rotary distributors
d Pumps__
O........................................................................................__.�
and similar fixed nozzle systems) .....:... _ . 4
e Stared-8 Power Supply 3
(iii) by subsurface disposal (includes low pressure
(f) Thermal Pollution Control Devicd............................................. 3
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) ............................. TOTAL_ POINTS _
(i) ivlicroscreens................................. `5
(j) Phosphorus Removal by Biological Processes
CLASSIFICATION
(See def. No. 26) ...... . ..................... 20
(k) Polishing ponds - without aeration ....... 2
Class I ................................ ................ I ....... .. 5 = 25 Dints
with aeration .......... 5
Class II ........................................................ Points
(I) Post Aeration - cascade .............. 0
Class Ili.............. . 51- 65 Points
........................................
diffused or mechanical ... 5
Class IV ........................................................ 66- Up Points
(m) Reverse Osmosis ......... I ........ I ............ 5
(n) Sand or Mixed -Media Filters - low rate ........... 2
Facilities having a rating of one through four points, inclusive,
high rate .......... 5
do not require a certified operator. Classification of all other
(o) Treatment processes for removal of metal or
facilities requires a comparable grade operator in responsible
cyanide ........ ............................ 15
charge.
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ......... 1 5
Facilities having an activated sludge process will be assigned
a minimum classification of Class II.
} SLUDGE TREATMENT
Facilities having treatment processes for the removal of metal
(a) Sludge Digestion Tank - Heated ...............
10 or cyanide will be assigned a minimum classification of Class It.
Aerobic ...............
5
Unheated ...... .......
(b) Sludge Stabilization (chemical or thermal) .. .....
3 facilities having treatment processes for the biological removal
5
of phosphorus will be assigned a minimum classification of Class
2
(c) Sludge Drying Beds - Gravity .................
Vacuum Assisted .......
5
(d) Sludge Elutrialion .............................
5 to -plant processes and related control equipment which are an
(e) Sludge Conditioner (chemical or thermal) ..... ...
5 integral part of industrial production shall not be considered waste
(f) Sludge Thickener (gravity) ......................
5 treatment. Likewise, discharges of wastewater from residences
(g) Dissolved Air Flotation Unit
having a design flow of 1,000 gpd or less, shall not be subject to
(not applicable to a unit rates as (3) (i) ....... - .
8 rating.
(h) Sludge Gas Utilization (including gas storage) . . . .
2
(i) Sludge Holding Tank - Aerated ................
5 ADDITIONAL OMMENTS:
Non-aeraled ............
2 —
(j) Sludge incinerator - (not including activated
carbon regeneration) .....
10
(k) Vacuum Filler, Centrifuge or Filter Press or other
similar dewalering 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
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 hold the permit for the wastewater treatment
facility where the sludge is generated .........
10
(c) Landlilled (burial) ................ . ............
5
(9) DISINFECTION
(a) Chlorination ........................ .....
5
(b) Dechlorinalion ........................
5
(c) Ozone ..............................
5
(d) Radiation ..........................
5
(1)Activaled Carbon Beds. A physicallchemical method for reducing soluble organic material from wastewater
effluent; the column -type beds used in this method will have a flow rate varying from Iwo to eight gallons per
minute per square foot and may'be either upflow or downllow carbon beds, Carbon may or may not be
regge.nerated on the wastewater treatment plant site.
(2)Aerated Lagoons, A basin in which -all solids are maintained in suspension and by which biological oxidation or,
organic mailer is reduced through artificially accelerated transfer of oxygen on a flow -through basis;
(3)Aeration. A process of bringing about intimate contact between air or high purity oxygen in a liquid by
spraying, agitalion diffusion;
(4)Agriculluraily managed site. Any site on which a crop is produced, managed, and harvested (Crop includes
grasses, grains, trees, etc);
(5)Air Stripping. A process by which the ammonium ion is first converted to dissolved ammonia (pH adjustinenl)
with the ammonia then released to the atmosphere by physical means; or other similar processes which remove
petroleum products such as benzene, loluene, 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.
(8)Conlrifuge. A mechanical device in which centrifugal force is used to separate solids from liquids and/or to
separate liquids of different dgnsities;
(9)Chemical 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 apptication points to achieve a specific result will be considered one system; the
capability to add chemical (s) to 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)Chemltal Sludge Conditioning. The addition of a chemical compound such as lime, ferric chloride, or a
polymer to wet sludge to coalesce the mass prior to fits application to a dewalering device;
(II)Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing
inorganic, non -toxic materials from sand, gravel, crushed stone or other similar operations, from which there is
no discharge 10 the surface waters: such systems shall carry a maximum of two points regardless of pumping
facilities or any other appurtenances;
(12)Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nilri(icatlon - A single stage system
'designed' to achieve 'advanced' permit effluent limits on BOD and ammonia nitrogen within the same biological
reactor.
(13)De-chlorination. The partial or complete reduction Of residual chlorine in a tiquid by any chemical or physical
process;
(14)Denitrification Process. The conversion of nitrate -nitrogen to nitrogen gas;
(15)Electrodialysis. Process for removing ionized salts from water through the use of ion-seleclive ion -
exchange membranes;
(16)Filler Press. A process operated mechanically for partially dewalering sludge;
(17)Foam Separation. The planned frolhing of waslewaler or wastewater effluent as a means of removing
excessive amounts of detergent materials through the introduction of air in the form of fine bubbles; also called
foam fractionation;
(18)Grit Removal. The process of removing grit and other heavy mineral mailer from wastewater;
(19)lmhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower
sludge digestion chamber;
(20)lnstrumenled Flow Measurement. A device which indicates and/or records rate of flow;
(21)lon Exchange. A chemical process in which ions from two dillerenl molecules are exchanged;
(22)Land application: (a) Sludge Disposal. A final sludge disposal method by which sludge may be applied to land
either by spraying on the surface or by subsurface injection (Le.. chisel plow); (not
appncaole for types of sludge described in (11) of this Rule); (b)Treated Effluent, The process of spraying
treated waslewaler onto a land area or other methods of application of wastewater onlo a land area as a means
of final disposal and/or treatment;
(23)Microscreen- A low speed, continuously back -washed, rotating drum filter 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) 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)Phosphale Removal Biological. The removal of phosphorus from wastewater by an oxic/anoxic process
designed to enhance luxury uptake of phosphorus by the microorganisms;
(27)Polishing Pond. A holding pond following secondary treatment with sufficienl detention 10 allow for the
settling of finely suspended solids;
(28)Posi 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
nonmechanicatr gravity means of flowing down a series of steps or weirs; The flow occurring across the steps or
weirs moves in a fairly thin layer and the operation of the cascade requires no operator adjustment; thus, zero
points are assigned even though this is an essential step to meeting the limits of the discharge permit;
(30)Powdered or Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological aclivily
and organic absorption by using powdered or granular activated carbon; Virgin and/or regenerated carbon is feed
controlled into the system;
(31)Preaeralion. A lank constructed to provide aeration prior to primary treatment:
(32)Preliminary Units. Unit operations in the treatment process, such as screening and comminution, that
prepare the liquor for subsequent major operations;
(33)industrial Presrealmenl: (a)Pre-lreatmen; Unit, Industrial. The condilioning of a waste at its source before
discharge, to remove or to neutralize substances injurious to sewers and treatment processes or to effect a
partial reduction in load on a treatment process which is operated by the same governing body as the wastewater
treatment plant being rated; (b)Pre-treatmenl Program, Industrial - must be a Slate or EPA required program to
receive points on the rating sheet,