WQ0006006_Final Permit_19920319

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 19, 1992
Mr. Wendell M. Murray, Jr.
Superintendent, Pender County Schools
Post Office Box 1239
Burgaw, North Carolina 28425
Subject: Permit No. WQ0006006
Pender County Board of Education
Malpass Corner Elementary School
Subsurface Disposal System
Pender County
Dear Mr. Murray:
In accordance with your application received January 3, 1992, we are forwarding herewith Permit
No. WQ0006006 dated March 19, 1992, to Pender County Board of Education for the construction and
operation of a 9,600 GPD LPP subsurface wastewater disposal system.
This permit shall be effective from the date of issuance until February 28, 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.
If any parts, requirements, or limitations contained in this permit are unacceptable to you, you have
the right to request an adjudicatory hearing upon written request within 30 days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
Regional Offices
AshevWe Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/5714700 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

One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this matter, please contact Mr. John Seymour at 919/ 733-50$3.
Z
ely,
vT. Ev e
cc: Pender County Health Department
Wilmington Regional Office, Water Quality
Wilmington Regional Office, Groundwater
Groundwater Section, Jack Floyd
Training and Certification Unit
Andrew & Kuske Consulting Engineers, Inc.
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
PERNIISSION IS HEREBY GRANTED TO
Pender County Board of Education
Pender County
I;Is) ZV V,1 !
construction and operation of a 9,600 GPD LPP subsurface wastewater disposal system consisting of two
1,500 gallon grease interceptors, a 10,000 gallon septic tank, a 7,000 gallon pump tank with dual 567
GPM pumps and high water alarms, dual approximately 1,350 foot long 8 inch force mains, four LPP
subfields totaling 50,400 square feet with one hundred and sixty-two 11%4 inch laterals at 60 feet long on 5
foot centers, and all associated piping, valves, controls and appurtenances to serve Malpass Corner
Elementary School with no discharge of wastes to the surface waters, pursuant to the application received
January 3, 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 February 28, 1997 and shall be subject
to the following specified conditions and limitations:
I. EERFORMANCE„STAIYDAR,DS
1. Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a professional engineer certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications. Mail the Certification to the Permits and Engineering Unit, P.O. Box
29535, Raleigh, NC 27626-0535.
2. The Wilmington Regional Office, phone no. 9191395-3900 shall be notified at least forty-
eight (48) hours in advance of backfilling of the installed facilities so that an in-place
inspection can be made. Such notification to the regional supervisor shall be made during
the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday,
excluding State Holidays.
3. In the event that the facilities fail to 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.

4. The issuance of this permit shall not relieve the Permittee of the responsibility for damages
to surface or groundwaters resulting from the operation of this facility.
5. This permit shall become voidable if the soils fail to adequately absorb the wastes and may
be rescinded unless the facilities are installed, maintained, and operated in a manner which
will protect the assigned water quality standards of the surface waters and ground waters.
6. Adequate measures shall be taken to divert stormwater from the disposal area and prevent
wastewater runoff from the subsurface disposal field.
7. The sludge generated from these treatment facilities must be disposed of in accordance with
General Statute 143-215.1 and in a manner approved by the North Carolina Division of
Environmental Management.
8. A usable reserve area shall be maintained for wastewater disposal. The reserve area shall
have the capability of accommodating the average daily flow of the facility being served
without exceeding the loading rates of the reserve area while meeting all required buffer
requirements.
9. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
10. The following buffers shall be maintained:
a) 100 feet between disposal area and any public or private water supply including
wells
b) 100 feet between disposal area and "SA and SB" classified surface waters
C) 50 feet between disposal area and any stream, lake, river or natural drainageway
d) 50 feet between disposal area and property lines
e) 10 feet between disposal area and surface water interceptor drains or diversions
(upslope)
f) 25 feet between disposal area and surface water interceptor drains or diversions
(downslope) and groundwater drainage systems.
11. A leakage test shall be performed on the septic tank and dosing tank to insure that any
exfiltration occurs at a rate which does not exceed twenty (20) gallons per twenty-four (24)
hour per 1,000 gallons of tank capacity. The engineer's certification will serve as proof of
compliance with this condition.
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 of the
wastewater treatment facilities. The operator must hold a certificate of the type and grade at
least equivalent to the classification assigned to the wastewater treatment facilities by the
Certification Commission. Once the facility is classified, the Permittee must submit a letter
to the Certification Commission which designates the operator in responsible charge within
thirty days after the wastewater treatment facilities are 50% complete.
3. The application rates to the disposal field shall not exceed 0.2 gallons per day per 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.
2

5. No traffic or equipment shall be allowed on the disposal area except while installation
occurs or while normal maintenance is being performed.
6. A suitable cover shall be maintained on the LPP field(s) and the field(s) shall be routinely
mowed The clippings shall be periodically removed to prevent the build-up of thatch.
BUT 1� 1' ► :a� : '�: ► : f �I: u
1. Any monitoring deemed necessary by the Division of Environmental Management to insure
surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
2. 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
e)
Wastewater flow
weekly
3. If Groundwater sampling indicates or predicts problems with the compliance with Groundwater
Standards, this permit will be modified to include additional and/or more restrictive limitations.
4. Three copies of all operation and maintenance records (as specified in condition III 2) shall
be submitted on or before January 31 of the following year to the following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
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.
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:
3

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.
IIAIW`f ►1'A: f u a
1. Prior to beginning waste disposal operations, MWS 2 and 5 shall be abandoned in
accordance with NCAC 2c.0113 (2). One additional well (MW -5) shall be installed at the
review boundary at the position indicated on the attached map. The well(s) 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 exact location and construction
details for these wells must be approved by the Wilmington Regional Office, from which a
well construction permit must be obtained.
2. The three (3) monitor wells (MWS 1,3, and 5) must be sampled once prior to waste
disposal operations and thereafter every February, June and October for the following
parameters:
NO3 TDS
TOC pH
Ammonia Nitrogen Chloride
Water Level Fecal Coliforms
Total Suspended Solids
Volatile Organic Compounds - In October 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
001488/039
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.
4

If TOC concentrations greater than 10 mg/I 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 backgMund 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 Foran) every
March, July, and November.
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 area, 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
REYIEW 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.
5

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.
1. This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans, specifications and other supporting data.
2. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
3. This permit is not transferable. In the event there is desire for the facilities to change
ownership, or there is a name change of the Permittee, a formal permit request must be
submitted to the Division of Environmental Management accompanied by an application
fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may
not be approved.
4. 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.
8. 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.
0

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.
Permit issued thihthe 19th day of March 1992
M'
eorge T. Eve et
Division of En
By Authority of
Permit No. WQ0006006
AL MANAGEMENT COMMISSION
Management Commission
7

Permit No. WQ0006006
March 19, 1992
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically, weekly, full time) the construction of the
project, ,
Project Narne
Location
for the
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
of the construction such that the construction was observed to be built within substantial compliance and
intent of the approved plans and specifications.
Signature Registration
Date
8

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9 Permanent Monitoring Well
— -- Ground Water Flow Directicr
sting Ditch

REM
(1)
(2)
(3)
RATING SCALE FOR CLASSIFICATION OF FACILITIES
Name of Plant: AW, Pe Aj- Ca, A05 -Mq1pq5s lrm-r t�a-y rl• 4ocl
Owner or Contact Person: f% z r
Mailing Address: k IZ 3 9 _ __ar%1t w__ N.�. ZPYZS
County:
NPDES Permit No. NCOO
Telephone:
Nondisc. Per. No. lA/Q ac --o f'oy'6'
IssueDate: G911/1z_ Expiration Date: of Zz rZI7 -
Existing Facility New Facility (/
Rated By: 7 Sto ft 4&r _ Date:���/92
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC
Grade
Plant Class: (circle one) W f! IIE IV Total Points ! 2
POINTS
Industrial Pretreatment Units and/or
Industrial Pretreatment Program
(see definition No. 33)
4
DESIGN FLOW OF PLANT IN GPD
(not applicable to non-contaminaled cooling waters, sludge
handling facilities for water purification plants, totally
closed cycle systems (dei. No. 11), and facilities
consisting only of Item (4) (d) or Items (4) (d) and (11) (d?1
0 -- 20,000 ..........................
4 i
20,001 -- 50,000 ..........................
2
50,001 -- 100,000 ..........................
3
100,001 — 250,000 ..........................
4
250,001 — 500,000 ..........................
5
500,001 --1,000,000 ..........................
8
1,004,001 -- 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 (god) :
PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens ................................ 1
or
(b) Mechanical Screens, Stalic Screens or
Comminuting Devices ........... ............. 2
(c) Grit Removal ............................... 1
or
(d) Mechanical or Aerated Grit Removal ........... 2
(e) Flow Measuring Device ....................... 1
or
(f) Instrumented Flow Measurement .............. 2
(g) Preaeration................................ 2
(h) Influent Flow -Equalization ................... 2
(i) Grease or Oil Separators - Gravity .......... 0
Mechanical .......... 3
Dissolved Air Flotation. 8
0) Prechlorination .............................. 5
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) ..............
(b) Imhoff Tank ..................................
(c) Primary Clarifiers .................+......... .
(d) Settling Ponds or Settling Tanks for Inorganic
Nan-loxic Materials (sludge handling facilities
for water purification plants, sand, gravel,
stone, and other mining operations except
recreational activities such as gem or gold
mining) ......................................
5
i
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System .....
Diffused Air System .......... .
Mechanical Air System (fixed,
floating or rotor) ..............
Separate Sludge Reaeration ....
(ii) Trickling Filter
High Rate ...................
Standard Rale ...............
Packed Tower ...............
(iii) Biological Aerated Filter or Aerated
Biological Filter ......................
(iv) Aerated Lagoons ..... . ............... .
(v) Rotating Biological Contactors ..........
(vi) Sand Filters -
intermittent biological .... .
recirculating biological .... .
K0 Stabilization Lagoons ...................
(viii)Clarifier ..............................
(ix) Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see dei. No. 12) (Points (or this item
have to be in addition to items (5) (a)
(7 through (5) (a) (vii) .................
(x) Nutrient additions to enhance BOD
removal.. .........
(xi) Biological Culture ('Super Bugs') addition
to enhance organic compound removal .... .
(b) Nitrogenous Stage
(i) Aeration - High Purity Oxygen System .....
Diffused Air System ...........
Mechanical Air System (fixed,
floating, or rotor) ...... ......
Separate Sludge Reaeralion .....
(ii) Trickling Filler -
High Rate ..............
Standard Rale ........... .
Packed Tower............
(iii) Biological Aerated Filler or Aerated
Biological Filler .........................
(iv) Rotating Biological Contactors ............
(v) Sand Filter -
intermittent biological ........
recirculating biological ........
(vf) Clarifier ................................

IT
(6� TER -VARY OR ADVANCED TREATf, r:NT UNIT
(10) -CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
{a} Activated Carbons Beds - 5
(not applicable to chemical additions rated as item
wrlhoul carbon regeneration ................
(3) G). (5) (a) (xi), (6) (a), (6) (b), (I) (b), (7) (e),
with carbon regeneration .................... 15
Powdered or Granular Aclivated Carbon Feed -
(4) {a), (4) {b), or {9) (c) S points each: List:
5
(b)
without carbon regeneration ................. 5
with carton regeneration .................... 15
5
(c) Air Stripping ....................... ... . ... 5
.. .. .
5
(d) Denitrification Process (separate process) ..... 10
(e) Elealrocfialysis .............................. 5
(11) MISCELLANEOUS UNITS
(� Foam Separation ............................. 5
(a) Folding Ponds, Molding Tanks or Settling Ponds
(g) ion 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, vravel, stone and other similar mining
greater than is common for domestic wastewater ..........
4
operations)
(b) Elfiuent Flow Equalization (not applicable to storage
(i) on agricullurally managed sites (See del.
basins which are inherent in land application systems).
2
No -4) ................................... 10
(c) Stage Discharge (not applicable to storage basins
(ii) by high rate infiltration on non -agriculturally
inherent in land application systems .......................................
5
managed sites (includes rotary distributors
(d) Pumps... .._...
and similar fixed nozzle systems) ........... 4
(e) Stand -By Power 5upp]y... _ _ . .......
3
(iii) by subsurface disposal (includes low pressure
(f) Thermal Pollution Control Device.. .......................... ...
3
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) ........................ 4G
TOTAL POINTS 1 Z
{7 Micro=eens.................................. 5
6) phosphorus Remo,ral by Biological Processes
CLASSIFICATION
(See der. No. 26) ............................ 20
polishing Ponds - without aeration ....... 2
5 - 25 Points
(k)
with aeration .......... 5
ss 11.._. .... W 26- 50 Points
(1) Post Aeration - cascade .............. 0
Class Ill ....... 51- 65 Points
diffused or mechanical ... 5
Class IV.....— . » .. _ 66- Up Points
(m) Reverse Osmosis ............................... 5
(n) Sand or Mixed -Media Filters - low rate ........... 2
Facilities having a rating of one through four points, inclusive,
high rale .......... 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 ......... 15
Facilities having an activated sludge process will be assigned
a minimum classification of Ciass 11.
1 SLUDGE TREATMENT
Facilities having treatment processes for the removal of metal
10
(a) Sludge Digestion Tank - Heated ...............
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
(c) Sludge Drying Beds - Gravity .................
2 ill.
Vacuum Assisted .......
5
(d) Sludge Elutriation .............................
5 In -plant processes and related control equipment which are an
(e) Sludge Conditioner (chernicat 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 1,0D0 gpd or less, shall not be subject to
(not applicable to a unit rates as (3) (1) .........
8 rating.
(h) Sludge Gas Utilization (including gas storage) ....
2
(i) Sludge Holding Tank - Aerated ................
5 ADDITIONAL COMMENTS:
Non-aerated ............
2
(j) Sludge Incinerator - (not including activated
carbon regeneration) .....
10
(k) Vacuum t=iller, Centrifuge or Filler Press or other
similar dewatering devices ....................
10
(8) SLUDGE DISPOSAL (including incinerated ash)
(a) Lagoons ........................................
2
(b) Land Application (surface and subsurface)
(see definition 22a)
-where the facility holds the land app. permit
10
-by contracting to a land application operator who
holds the land application permit ................
2
-land application of sludge by a contractor who does
not hold the permit for the wastewater treatment
facility where the sludge -is generated .........
10
(c) Landfilled (burial) .............................
5
(9) DISINFECTION
(a) Chlorination .............................
5
(b) Dechtorinalion ........................
5
(c) Ozone ..............................
5
(d) Radiation ..........................
5