WQ0004332_Final Permit_19910328

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
March 28, 1991
The Honorable John T. Dowd, Mayor
The Town of Edenton
Post Office Box 300
Edenton, NC 27932
George T. Everett, Ph.D.
Director
Subject: Permit No. WQ0004332
The Town of Edenton
Wastewater Treatment Plant
Spray Irrigation
Chowan County
Dear Mayor Dowd:
In accordance with your application received October 30, 1990, we are forwarding
herewith Permit No. WQ0004332, dated March 28, 1991, to the Town of Edenton for the
continued operation of the subject treatment and disposal system. Issuance of this permit hereby
voids Permit No. 13255, issued June 6, 1986.
This permit shall be effective from the date of issuance until February 29, 1996, and shall
be subject to the conditions and limitations as specified therein. Please pay particular attention to
the monitoring requirements and the Pretreatment Conditions (Part VI) 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. Box 11666, Raleigh, NC 27604. Unless such demands are made this permit shall
be final and binding.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Mayor Dowd
March 28, 1991
Page Two
If you need additional information concerning this matter, please contact Mr. Lindsay L.
Mize at 919/ 733-5083.
Sincerely,
aa'j''` �
George T1 Everett
cc: Chowan County Health Department
Washington Regional Office
Groundwater Section
Training and Certification Unit
The Wooten Company

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
The Town of Edenton
Chowan County
FOR THE
continued operation of a pump station with two (2) 2100 GPM pumps, degritting unit, screening
basket, an air scrubber unit, providing hydrogen peroxide odor control system, approximately
19,405 linear feet of 18-inch force main and force main discharge odor control chlorination system;
and continued operation of a 1.076 MGD land application wastewater treatment facilities consisting
of a 28-acre stabilization/ storage lagoon(with a baffle wall and an aeration area including three (3)
20 HP directional aerators) providing a minimum 21-day detention and a 45-day storage capacity, a
lagoon liner of natural clay material with a minimum thickness of one (1) foot and a minimum
permeability of Ix 10-6 cm/sec, a subsurface drainage system with diffused subsurface discharge,
chlorination facility, a spray irrigation pump station housing two (2) pumps (4026 GPM), spray
irrigation lines with spray risers (solid set) covering 300 wetted acres, seven (7) groundwater
monitoring wells, and an administration/maintenance building to serve the Town of Edenton with
no discharge of wastes to the surface waters, pursuant to the application received October 30, 1990
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 February 29, 1996, 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 (existing facilities may be exempt):
a) 400 feet between wetted area and any residence 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.
II. OPERATION -AND MAINTENANCE REQUIREMENTS
1. The facilities shall be properly maintained and operated at all times.
2. 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 grade at least equivalent to the classification assigned to the wastewater
treatment facilities by the Certification Commission.
3. A suitable vegetative year round cover 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 application rate shall not exceed: a) 0.9 inches/acre/week and b) 0.25 inches/acre/hour.
8. No type of wastewater other than that from the Town of Edenton shall be sprayed onto the
irrigation area.
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. Freeboard in the lagoons shall not be less than 2.5 feet at any time.
2

III. MONITORING AND REPORTING REQUIREMENTS
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,
i) 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:
Parameter
BOD5 Sodium
TS S Magnesium
Fecal Coliform Calcium
pH Sodium Adsorption Ratio by Calculation
NH3 as N
4. Three copies of all operation and disposal records (as specified in condition III 2) and all
effluent monitoring data (as specified in condition III 3) and any other data as may be
required shall be submitted on or before the last clay of the following month to the following
address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 27687
Raleigh, NC 27611-7687

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.
IV. GROUNDWATER REQUIREMENTS
The seven (7) existing monitor wells shall be sampled every March, July, and
November for the following parameters:
NO3 (10.0)
TOC
Ammonia Nitrogen
Water Level
Total Suspended Solids
Volatile Organic Compounds -
TDS (500.0)
pH ( 6.5-8.5 standard units)
Chlorides (250.0)
Fecal Coliforms (1/100 ml)
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.
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 the water in each well shall be measured from the
surveyed point on the top of the casing.

The numbers in parentheses represent the maximum allowable concentrations in
groundwater for the various analytical parameters, as specified in 15 NCAC 2L
[Groundwater Classifications and Standards]. Unless otherwise noted, the units for
these concentrations are expressed as milligrams per liter.
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 round 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.
2. The Compliance Boundarx 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 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 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 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 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.
3. Any additional groundwater quality monitoring, as deemed necessary by the
Division, shall be provided.
5

V . INSPECTIONS
1. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
2. The Permittee or his designee shall inspect the wastewater treatment and disposal
facilities to prevent malfunctions and deterioration, operator errors and discharges which
may cause or lead to the release of wastes to the environment, a threat to human health,
or a nuisance. The Permittee shall keep an inspection log or summary including at least
the date and time of inspection, observations made, and any maintenance, repairs, or
corrective actions taken by the Permittee. This log of inspections shall be maintained by
the Permittee for a period of three years from the date of the inspection and shall be made
available upon request to the Division of Environmental Management or other permitting
authority.
3. Any duty authorized officer, employee, or representative of the Division of
Environmental Management may, upon presentation of credentials, enter and inspect
any property, premises or place on or related to the disposal site and facility at any
reasonable time for the purpose of determining compliance with this permit; may inspect
or copy any records that must be kept under the terms and conditions of this permit; or
may obtain samples of groundwater, surface water, or leachate.
VI. PRETREATMENT PROGRAM REQUIREMENTS
A. Requirements for Control of Pollutants Attributable to Industrial Users
I. Pollutants attributable to inputs from major contributing industries using the
municipal system may be present in the permittee's discharge. At such time as
sufficient information becomes available to establish limitations for such pollutants,
this permit may be revised to specify limitations for any or all such other
pollutants.
2. Under no circumstances shall the permittee allow introduction of the following
wastes in the waste treatment system:
a. Wastes which create a fire or explosion hazard in the treatment works.
b. Wastes which will cause corrosive structural damage to treatment works, and
in no case discharges with pH less than 5 unless the system is specifically
designed to accommodate such discharges.
C. Solid or viscous substances in amounts which cause obstructions to the flow
in sewers or interference with the proper operation of the treatment works.
d. Wastewaters at a flow rate and/or pollutant concentration which will cause an
inhibition or disruption of the POTW, its treatment processes, operation, or
sludge use and disposal.
e. Heat in amounts which will inhibit biological activity in the treatment works,
resulting in interference but in no case heat in such quantities that the
temperature at the treatment works influent exceeds 40°C(IO40F) unless the
works are designed to accommodate such heat.
n

3. It may be necessary for the permittee to supplement the requirements of 15A NCAC
2H .0900 to ensure compliance by the permittee with all applicable limitations.
Such actions by the permittee may be necessary regarding some or all of the
contributing industries discharging to the municipal system.
4. Permittee shall require any industrial dischargers into the permitted system to meet
the requirements of 15A NCAC 2H .0900. Prior to accepting wastewater from any
significant industrial user the permittee shall develop and submit to the Division for
approval a modified Pretreatment Program.
A significant industrial user is one which discharges wastewater into a publicly
owned treatment works and which:
a. has an average daily process wastewater flow of greater than 50,000 gallons
per day, or
b. contributes more than 5% of any design capacity of the wastewater treatment
plant which receives the discharge, or
C. is required to meet a national categorical pretreatment standard, or
d. is determined by the control authority to have a potential to adversely impact
the wastewater treatment plant, or to limit the POTW sludge disposal options.
5. This permit shall be modified, or alternatively, revoked and reissued, to incorporate
or modify an approved POTW Pretreatment Program or to include a compliance
schedule for the development of a POTW Pretreatment Program as required under
15A NCAC 2H .0900 regulations or by the requirements of the approved State
pretreatment program, as appropriate.
B . Pretreatment Program Implementation
Under the authority of North Carolina General Statute 143-215.1 and 143-215.3(14)
and implementing regulations 15 NCAC 2H .0900, and in accordance with the approved
pretreatment program all provisions and regulations contained and referenced in the
Pretreatment Program Submittal are an enforceable part of this nondischarge permit.
The permittee shall operate its approved pretreatment program in accordance with the
State Pretreatment Regulations 15 NCAC 2H .0900, and the legal authorities, policies,
procedures, and financial provisions contained in its pretreatment program submission.
Such operation shall include but is not limited to the implementation of the following
conditions and requirements:
1. The permittee shall develop specific limits to implement the prohibitions listed in
15A NCAC 2H .0900.
2. Within 120 days of the effective date of this permit the permittee shall draft and
submit a monitoring program for the collection of facility specific data to be used in
a wastewater treatment plant headworks analysis for the development of specific
local pretreatment standards as required by paragraph 1 above. The permittee shall
modify and implement the monitoring program based on comments received by the
Division within 180 days of the effective date of this permit.
3. 180 days prior to the expiration date of this permit the permittee shall submit a
headworks analysis based on the data collected via the monitoring program required
by paragraph 2 above.
7

4. The permittee shall issue permits for construction, operation and discharge to all
significant industrial users in accordance with NCGS 143-215.1 These permits
shall contain limitations, sampling protocols, reporting requirements, appropriate
standard conditions, and compliance schedules as necessary for the installation of
control technologies to meet applicable pretreatment standards and requirements.
Prior to issuance of a permit to construct or as a condition of the permit, an
evaluation of the treatment process proposed must be made as to its capacity to meet
the permit limitations.
5. The permittee shall carry out inspection, surveillance, and monitoring requirements
as described in its approved pretreatment program in order to determine,
independent of information supplied by industrial users, compliance with applicable
pretreatment standards. All significant industrial users must be sampled by the
permittee at least twice per year for limited parameters.
6. The permittee shall enforce and obtain appropriate remedies for violations of
categorical pretreatment standards promulgated pursuant to Section 307(b) and (c)
of the Clean Water Act (40 CFR 405 et. seq.), prohibitive discharge standards as
set forth in 15A NCAC 2H .0900 and specific local limitations. All enforcement
actions shall be consistent with any Enforcement Response Plan approved by the
Division.
7. The permittee shall require all industrial users to comply with the applicable
monitoring and reporting requirements outlined in the approved pretreatment
program, the industry's pretreatment permit and/or in 15 NCAC 2H .0908.
8. The permittee shall submit twice per year, 2 copies of a pretreatment report
describing its pretreatment activities over the previous six months. A report shall be
submitted to the Division by August 1 of each year describing pretreatment activities
for January 1 through June 30 of that year, and a like report shall be submitted by
February 1 of each year for the activities conducted from July 1 through December
31 of the previous year. These reports shall contain the following information:
a. a narrative summary of actions taken by the permittee to ensure compliance
with pretreatment requirements and standards
b. a list of any substantive changes made in the approved pretreatment program
C. a compliance status summary of all significant industrial users
d. a list of those significant industrial users in reportable noncompliance with
pretreatment requirements and standards, the nature of the violations, and
actions taken or proposed to correct the violations
e. sampling and analytical results recorded on forms approved by the Division
f. upon request, other information pertinent to the implementation of the
permittee's pretreatment program
9. The permittee shall retain for a minimum of three years record of monitoring
activities and results, along with support information including general records,
water quality records, and records of industrial impact on the POTW.
10. The permittee shall publish annually, pursuant to 15 NCAC 2H .0905, a list of
significant industrial users that have significantly violated pretreatment requirements
and standards during the previous twelve month period.
11. The permittee shall maintain adequate funding levels to accomplish the objectives of
its approved pretreatment program.

12. The permittee shall maintain adequate legal authority to implement its approved
pretreatment program.
13. The permittee shall update its industrial user survey at least once every five years.
14. Modifications to the approved pretreatment program including but not limited to
local limits modifications and monitoring program changes shall be considered
permit modification and shall be governed by 15 NCAC 2H .0200.
VIL GENEHAL CONDITI(L
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 143-215.6.
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. Prior to any transfer of this land, a notice shall be given to the new owner that gives full
details of the materials applied at this site.
7. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of the project.
8. 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).
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. 13255, issued June 6, 1986.

Permit issued this the 28th day of March, 1991
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
George T. E rett, Director
Division of vironmental M agement
By Authority of the Environmental Management Commission
Permit No. WQ0004332
10

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(MI5CELLANE•OU5 UNITS CONTINUED) POINTS
(c) Holding Pond for Effluent Flow Equalization and/or
Stage Discharge . . . . . . . . . . . . . . . . . . 5
(d) Effluent Pumps . . . . . . . . . . . . . . . . . . 3
(e) In -Plant Pumps (including air lifts). . . . . . . _ m
(f) Stand -By Power Supply . . . . . . . . . . . . 3
(g) Thermal Pollution Control Device . . . 3
{h} Treatment Processes for Removal of Metal or Cyanide and
other Toxic Materials . . . . .. . . . . . . . . . . 30
Total Points
CLASSIFICATIOH
Class I . . . . . . . . . . . . . 5 - 25 Points
Class 11 . . . . . . . . . . . . . . . 26 - 50 Points
Class III . . . . . . . . . . . . . . . 51 - 65 Paints
Class [Y . . . . . . . . . . . . . . . 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.
North Carolina
Division of Environmental Management
Checklist of Facility Components
To be Used In Determing Facility Classification
All information will be printed; /
Name of Plant A(, c
County _��j f�1G�.r✓i
Owner or Contact Person ily�"rd 1310)9-117 5 �"�7,9
/ eiipapine
Mailing Address S 3 p /?4�-77/ 3
Street or P.0 'Rnx No. Town or City Zip
Permit Number Information
Construction Status
HPDES Permit No. Please Check:
Existing Facility
Date Issued Upgraded Facility icy
New facility
state Permit No. 1-­Qoloo 3 '7 If Upgraded or New Facility, Give:
/ 50% Completion Date
Date Issued / q / '�/ 1005 Completion Date
Rated by j]/✓l„- _ Regional Office %�a'sri7���/r Date y g
Operator in Responsible Charge
Design Flow of Plant in GPD
ITEM
rade
Plant Class
POINTS
(1)
PRETREATMENT UNITS (see definition No. 34) . . . . . . . . 2
(2)
DESIGN FLOW OF PLANT IN GPD (not applicable to non -
contaminated cooling waters and non -discharging system
0 -- 20,000 . . . . . . . . . . . . . . . . . . 1
20,001 -- 50,000 . . . . . . . . . . . . . . . . . . 2
50,001 -- 100,000 . . . . . . . . . . . . . . . . . . 3
100,001 -- 250,000 . . . . . . . . . . . . . . . . . . 4
250,001 -- 500,000 . . . . . . . . . . . . . . . . . . 5
500,001 -- 11000,000 . . . . . . . . . . . . . . . . . 8
1.000,001 -- 2.000,000 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. 3 . . . . . . . ._
(a) Influent Pumps (including air lift) . . . . . . . . . 3
(b) Bar Screens . . . . . . . . . . . . . . . . . . . . . 1
or
(c) Mechanical Screens, Static Screens or Comminuting
Devices . . . . . . • . . . . . . . . . . . . . 2
(d) Grit Removal or . . . . . . . . . . . 1
(e) Mechanical or Aerated Grit Removal . . . . . . . . . 2
(f) Flow Measuring Device or . . . . . . . . . . . . . . 1
(g) Instrumented Flow Measurement . . . . . . . . . . . . 2
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411187 -1-

ITEM
POINTS
(h)
Preaeration or Equalization . . . . . . . . . . . .
1
Grease or Oil Separators -- Gravity
2-
Mechanical. . . . . . .
3
Aerated . . . . . . . .
5
(j)
Chemical Conditioning . . . . . . . . . . . . . . .
5
(4)
PRIMARY
TREATMENT UNITS
(a)
Septic Tank (see definition No. 44) . . . . . . . .
0
(b)
Imhoff Tank . . . . . . . . . . . . . . . . . .
3
Primary Clarifiers (including sludge air -lifts) . .
5
�c)
d)
Settling Pouds or Settling Tanks for Inorganic Non -
Toxic Materials Involving a Discharge to the Surface
waters (sand, gravel, stone, and other mining operations
except recreational activities such as gem or gold
mini ng) . . . . . . . . . . . . . . . ..
10
(5)
SECONDARY TREATMENT UNITS
(a)
Carbonaceous Stage
(i) Aeration - High Purity Oxygen System . . . .
20
Diffused Air System . . . .dD
Mechanical Air System (fixed, floating or rotor)
8
Separate Sludge Reaeration . . . . . . . . .
3
(11) Trickling Filter - High Rate . . . . . _
7
Standard Rate . . . . . .
5
Packed Tower . . . . . . .
5
(iii) Aerated Lagoons . .
10
(iv) Rotating Biological Contactors (biodisc).
10
(v) Sand Filters (intermittent biological)
2
(vi)1 Stabilization Lagoons
5
(vii) Clarifier (including sludge air lifts). . . .
5
(b)
Nitrogenous Stage
(i) Aeration - High Purity Oxygen System. . . . .
20
Diffused Air Systems. . . . . . . . . . .
Mechanical Air System (fixed, floating, or rotor)8
10
Separate Sludge Reaeration . . . . . . . . .
3
(11) Trickling Filter - High Rate . . . . . . . .
7
Standard Rate . . . . . .
5
Packed Tower. . . . .
5
.(Iii)
Rotating Biological Contactors (biodisc) . .
10
(1v) Sand Filter (intermittent biological). . . .
2
(v) Clarifier (including sludge air lifts) . . .
5
(6)
TERTIARY OR ADVANCED TREATMENT UNITS
(a)
Activated Carbon Beds - Without Carbon regeneration
5
With Carbon regeneration,
15
(b)
Powdered or Granular Activated Carbon Feed - Without
Carbon regeneration
5
With Carbon regeneration.
15
(c)
Ammonia Stripping . . . . . . . . . . . . . . . .
18
(d)
Chemical Additions . . . . . . . . . . . . .
5
(e)
Oenitrification Process (separate process). . . .
10
(f)
Electrodialysis . . . . . . . . . . . . . . . . .
5
(g)
Foam Separation . . . . . . . . . . . . . .
5
(h)
Ion Exchange . . . . . . . . . . . . . . . . . . .
5
ITEM
POINTS
(1)
Land Application (see definition No. 23b) . . . . .
(not applicable for facilities under 10(a) . . - -
0 )
Microscreens . . . . . - . . . .. . . .
5
(k)
Phosphorus Removal . . . . . . . . . . . . . . . .
20
(1)
Polishing Ponds- Without aeration . . . . . . . .
With aeration . . . . . . - . .
5
(m)
Post Aeration - Cascade . . - _ . . . . . _
0
Diffused or Mechanical . . . . . .
5
(n)
Pre -Package Unit for Removal of Oil and Grease
30
(a)
Reverse Osmosis . . . . . . . . .
5
(p)
Sand or Mixed -Media Filters -- Low Rate . . . . . .
2
High Rate ..
5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank -- Heated . . . . . . . . . .
10
Aerobic . . . . . _ . _ .
5
Unheated . . . . . .
3
(b)
Sludge Stabilization (chemical or thermal) . . . .
10
(c)
Sludge Drying Beds . . . . . . . . . . . . . . . .
2
(d)
Sludge Elutriation . . . . . . . .
5
Sludge Conditioner (chemical or thermal) - . . . .
5
�e)
f)
Sludge Thickener . . - . - . .
2
(g)
Sludge Gas Utilization (including gas storage).
2
(h)
Sludge }folding Tank -- Aerated .
5
Non -aerated . . .
2
(i)
Sludge Incinerator (not including activated carbon
regeneration) . . . . . .
10
(j)
Vacuum Filter, Centrifuge or Filter Press . . . .
10
(8)
SLUDGE DISPOSAL (including incirierated ash)
(a)
Lagoons . . . . . . . . . . . . . . . .
2
(b)
Land Application (surface and subsurface) -(see deft.
23a ) . . . . . . . . . . . . .
10
(c)
Landf111ed (burial) . . . . . . .
5
(9)
DISINFECTION
Pre . . . . . . . . . . . . . . . . . . . . . . .
1
�a)
b)
Intermediate . . . . . . . . . . . . . . . . . .
2
(c)
Post . . . . . . . . . . . . . . . . . . . . . .
(d)
Dechlorination. . . . . . . . . . .
5
(e)
Chlorine or Ozone Generation . . . . . . . . . _
5
(f)
Radiation . . . . . . . . . . . . . . . .
3
(10)
MISCELLANEOUS
UNITS
(a)
Holding Ponds or Holding Tanks for Inorganic, Non -toxic
Materials with no Discharge to the Surface Waters
2
(Sludge handling facilities for water purification
plants, sand, gravel, crushed stone and other similar
operations --see definition NO. 10)
(b)
Holding Ponds or Holding Tanks for Organi or Toxic
Materials with no Discharge to the surface Waters
(Any pump, valve, or other mechanical control subject
to failure creating a potential for bypass or discharge
from the holding ponds or tanks will necessitate a
minimum classification Of Glass I requiring a certified
operator).
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