WQ0006085_Final Permit_19920511

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 George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
May 11, 1992
The Honorable Betty S. Williamson, Mayor
Town of Ocean Isle Beach
3 West Third Street
Ocean Isle Beach, North Carolina 28460
Subject: Permit No. WQ0006085
Town of Ocean Isle Beach
Wastewater Spray Irrigation
Brunswick County
Dear Mayor Williamson:
In accordance with your application received January 17, 1992, we are forwarding herewith Permit
No. WQ0006085, dated May 11, 1992, to the Town of Ocean Isle Beach for the subject spray irrigation
system.
This permit shall void Permit No. 11284 issued June 26, 1996 and shall be effective from the date
of issuance until April 30, 1997, and shall be subject to the conditions and limitations as specified therein.
Please pay particular attention to the monitoring requirements in this permit. Failure to establish an
adequate system for collecting and maintaining the required operational information will result in future
compliance problems.
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
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 9191733-2314 919/946-6481 919/395-3900 9191896-7007
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 Ms. Angela Y. Griffin at 9I9/ 733-5083.
Brunswick County Health Department
Wilmington Regional Office, Water Quali
Wilmington Regional Office, Groundwat,_
Groundwater Section, Jack Floyd
Training and Certification Unit
Boney and Associates, Inc.
Facilities Assessment Unit

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SPRAY IRRIGATION SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina
as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Town of Ocean Isle Beach
Brunswick County
WPA-1�-b
continued operation of a .508 MGD spray irrigation system consisting of a manual bar screen, dual three
(3) foot by fifteen (15) foot grit chambers, a 4.68 MG primary cell, two (2) 7.125 MG secondary cells, a
15,625 gallon chlorine contact chamber, chlorination equipment, a 250,000 gallon storage pump station
equipped with dual 400 GPM pumps a high level alarm and alternate power, a recording flow meter, and a
110 acre spray irrigation field equipped with 666 sprinklers each with a 56 foot radius and the construction
and operation of a 22.5 MG lined storage lagoon to provide the storage of an additional .250 MGD of
wastewater to serve the Town of Ocean Isle Beach with no discharge of wastes to the surface waters,
pursuant to the application received January 17, 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 void Permit No. 11284 issued June 26, 1986 and shall be effective from the date
of issuance until April 30, 1997, and shall be subject to the following specified conditions and limitations:
I. PERFORMANCE STANDARDS
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. [phone] shall be notified at least forty-
eight (48) hours in advance of operation 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. 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.
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. 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. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
7. The following buffers shall be maintained:
a) 400 feet between wetted area and any residence or places of public assembly under
separate ownership,
b) 150 feet between wetted area and property lines,
c) 100 feet between wetted area and wells,
d) 100 feet between wetted area and drainageways or surface water bodies,
e 50 feet between wetted area and public right of ways,
100 feet between wastewater treatment units and wells,
g) 50 feet between wastewater treatment units and property lines.
8. 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)
hours per 1,000 gallons of tank capacity. The engineer's certification will serve as proof of
compliance with this condition.
I WAR in V WE
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of
the wastewater treatment facilities. The operator must hold a certificate of the type and
grade at least equivalent to or greater than the classification assigned to the wastewater
treatment facilities by the Certification Commission. The Permittee must also employ a
certified back-up operator of the appropriate type and grade to comply with the conditions
of Title 15A, Chapter 8A, .0202. The ORC of the facility must visit each Class I facility at
least weekly and each Class II, III, and IV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A, .0202.
3. A suitable year round vegetative 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.
2

6. The facilities shall be effectively maintained and operated as a non -discharge system to
prevent the discharge of any wastewater resulting from the operation of this facility.
7. The average annual weekly application rate shall not exceed 1.75 inches/acre.
8. No type of wastewater other than that from the storage lagoons 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.
1. Any monitoring (including groundwater, surface water, soil or plant tissue analyses)
deemed necessary by the Division of Environmental Management to insure surface and
ground water protection will be established and an acceptable sampling reporting schedule
shall be followed.
2. Adequate records shall be maintained by the Permittee tracking the amount of wastewater
disposed. These records shall include, but are not necessarily limited to the following
information:
a) date of irrigation,
b) volume of wastewater irrigated,
c) field irrigated,
d) length of time field is irrigated,
e) continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for
each field,
f) weather conditions, and
g) maintenance of cover crops.
3. The effluent from the subject facilities shall be monitored by the Permittee at the point prior
to irrigation every March, July and November for the following parameters:
BODS TS S
Fecal Coliform pH
4. Three copies of all operation and disposal records (as specified in condition 1112) and all
effluent monitoring data (as specified in condition 111 3) and any other data as may be
required shall be submitted on or before the last day of the following month to the
following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
3

5. Noncompliance Notification:
IV.
The Permittee shall report by telephone to the Wilmington Regional Office, telephone no.
[phone], 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.
Prior to the operation of the storage lagoon, one additional monitoring well shall be
installed to monitor groundwater quality. 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. However, the exact location and construction details for these
wells shall be approved by the Wilmington Regional Office, from which a well
construction permit must be obtained.
2. The new monitor well shall be sampled initially after construction for the parameters below.
All monitoring wells (5 existing wells and 1 new well) shall be sampled every March, July,
and November for the following parameters:
NO3
TOC
Ammonia Nitrogen
Water Level
Orthophosphate
NO2
Volatile Organic Compounds -
pH
Chlorides
Fecal Coliforms
Total Suspended Solids
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
4

3. The measurement of water level must be made prior to sampling for the remaining
parameters.
4. 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.
5. 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 background monitor well exceeds 10 mg/1, 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.
6. 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.
7. 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.
8. The lagoon shall have a liner of natural material at least one (1) foot in thickness,
compacted to 95% proctor standard dry density and installed and compacted in layers no
thicker than six inches, with a hydraulic conductivity of no greater than 1 x 10-6
centimeters per second when compacted. Following installation and inspection of the
lagoon liner, and prior to waste disposal operations, verification of the liner's compliance
with hydraulic conductivity and thickness specifications must be provided to the Division
of Environmental Management, Groundwater Section, by the project engineer.
9. The Compliance Boundary 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.
10. For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the lagoons, or 50 feet within the property
boundary.
11. 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.
k,

12. The REVIEW _]3QUNQARY for the disposal system is specified by regulations in 15
NCAC 2L, Groundwater Classifications and Standards. A RE=W 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.
13. Any additional groundwater quality monitoring, as deemed necessary by the Division, 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 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.
VI. GENERAL (;ONDITIONS
1. This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans, specifications, and other supporting data.
2. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
3. This permit is not transferable. In the event there is a desire for the facilities to change
ownership, or there is a name change of the Permittee, a formal permit request must be
submitted to the Division of Environmental Management accompanied by an application
fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may
not be approved.
4. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Environmental Management in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
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. A set of approved plans and specifications for the subject project must be retained by the
Permittee, for the life of the project.
7. The annual administering and compliance fee must be paid by the Permittee within thirty
days after being billed by the Division. Failure to pay the fee accordingly may cause the
Division to initiate action to revoke this permit as specified by 15 NCAC 2H .0205 (c)(4).
8. The 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 this the 1 lth day of May, 1992
CAROLINA
uu_,"J-�
George T. Everett, I
Division of Environ
By Authority of the
Permit Number WQ0006085
Rk 91101u1ST-MWi1112
Management Commission
7

Permit No. WQ0006085
May 11, 1992
En&egr's Certification
I, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the
project,
Project Name
Location
for the
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
of the construction such that the construction was observed to be built within substantial compliance and
intent of the approved plans and specifications.
Signature
Date
Registration No.
8

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xv

RATING SCALE FOR CLASSIFICATION OF FACILITIES
Name
of Plant:
104�0,v oeCa14..! 1 s%
teed
Owner
or Contact
Person: Cj)6!,,11 t4j,1hgwjg,,0,6
, e wavo ----
Mailing
Address:
,3 Werr L &
_
/
/
County:
_2uA, 5"tck_
Telephone: 9t9
S4 9 - ZIG L
NPDES
Permit No.
NC00 Nondisc. Per.
No. LJ Doy608r
lssueDate:
Expiration Date:
Existing Facility ✓ New Facility
Rated Byre. Ad)(11gs _ Date- Z9 PfAAa f49
Reviewed (Train. & Cert.) Reg. Office -
Reviewed (Train. & Cert.) Central Office
ORC Grade
Plant Class: (circle one) 1 0111 IV Total Paints
ITEM POINTS
(1) Industrial Pretreatment Units and/or
Industrial Pretreatment Program
(see definition No. 33)
4
(2) DESIGN FLOW OF PLANT IN GPD
(not applicable to non -contaminated cooling waters, sludge
handling facilities for water purification plants, totally
closed cycle systems (def. No. 11), and facilities
consisting only of item (4) (d) or Items (4) (d) and (11) (d))
0 20,000..........................
1
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..........................
19
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) : __L00q coO
(3) PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens ................................
lJ
or
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........... .............
2
(c) Grit Removal ...............................
Q
or
(d) Mechanical or Aerated Grit Removal ...........
2
(e) Row Measuring Device .......................
1
or
(1) Instrumented Flow Measurement ..............
Q
(g) Preaeralion................................
2
(h) Influent Flow -Equalization ...................
2
(i) Grease or Oil Separators - Gravity ..........
2
- Mechanical..........
3
Dissolved Air Rotation.
8
Q) Prechlarination ..............................
5
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) .............. 2
(b) Imhoff Tank .................................. 5
(c) Primary Clarifiers ............................ 5
(d) Settling Ponds or Settling 'tanks for Inorganic
Non -toxic Materials {sludge handling facilities
for water purification plants, sand, gravel,
stone, and other mining operations except
recreational activities such as gem or gold
mining) ...................................... 2
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System .....
Diffused Air System .......... .
Mechanical Air System (fixed,
floating or rotor) ..............
Separate Sludge Reaeration . _ .. .
(ii) Trickling Filter
Nigh Rate ...... . ........... .
Standard Rate ...............
Packed Tower ...............
(iii) Biological Aerated Filter or Aerated
Biological Filter .............. . .......
(iv) Aerated Lagoons ..................... .
(v) Rmaling Biological Contactors ......... .
(vi) Sand Filters-
intemittent biological .....
recirculating biological .....
(vii) Stabilization Lagoons ...................
(viii)Clzrifier ..............................
(ix) Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see def. No. 12) (Points for this item
have to be in addition to items (5) (a)
(i) through (5) (a) (viii) .................
(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 Reaeration .....
(ii) Trickling Filter -
High Rate ..............
Standard Rate ............
Packed Tower............
(iii) Biological Aerated Filter or Aerated
Biological Filter .........................
(iv) Rotating Biological Contactors ............
(v) Sand Filter -
intermittent biological ....... .
recirculating biological ........
(v i) Clarilier ................................
20
10
8
3
7
5
5
10
10
ire,
2
5
8
5
5
20
10
8
3
7
5
5
10
10
2
3
5

(6) TERTIARY OR ADVANCED TREATMENT UNIT
(t0) CHEMICAL ADDITION SYSTEM (S) {See definition No. 9)
{a}
Activated Carbons Beds -
(not applicable to chemical additions rated as item
without carbon regeneration ..................
5
(3) (j), (5) (a) (xi), (6) (a), (6) (b), (7) (b), (7) (e),
with carbon regeneration .....................
is
9 a , 9 b , or 9 c 5 Dints each: List:
O {) O O {) O P
(b)
Powdered or Granular Activated Carbon Feed -
5
without carbon regeneration .................
5
- 5
with carbon regeneration . ............ . ..
15
5
(c)
Air Stripping .......................:.....
5
5
(d)
Denitrilicalion Process (separate process) ... ..
10
(e)
Electrodialysis :.............................
5
(11) MISCELLANEOUS UNiTS
(f}
Foam Separation .............................
5
(a) Holding Ponds, Holding 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, gravel, stone and other similar mining
greater than is common for domestic wastewater .......... 4
operations)
(b) Effluent Flow Equalization (not applicable to storage
W on agriculturally managed sites fSee def
-No- 4)
i 0
basins which are inherent in land application systems). 2
...................................
(c) Stage Discharge (not applicable 10 storage basins
(ii) by high rate infiltration on non -agriculturally
inherent in land application systems .................
managed sites (includes rotary distributors
(d) Pumps ......... :................_...... .......... ................................................. , ....�
and similar fixed nozzle systems) ...........
4
(e) Stand -By Power Supply.................................................................. 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 lank and nitri€ica-
fion lines only) .............................
4
TOTAL POINTS
{i}
Microscreens.................................. 5
{j)
Phosphorus Removal by Biological Processes
CLASSIFICATION
(See def. No. 26) ............................
20
(k)
Polishing Ponds - without aeration .......
2
Class I ........................................................... 5 - 25 Points
with aeration ..........
5
Class 11........................................................ 26- 50 Points
(1)
Post Aeration • cascade ..............
0
Class iII....................................................... 51- 65 Points
diffused or mechanical ...
5
Class IV ........................................................ 66- Up Points
(m) Reverse Osmosis ...............................
5
(n)
Sand or Mixed -Media Fillers - 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 IL
I SLUDGE TREATMENT
(a)
Sludge Digestion Tank - Healed ...............
10
Aerobic ...............
5
Unheated ...... .......
3
(b)
Sludge Stabilization (chemical or thermal) .......
5
(c)
Sludge Drying Beds - Gravity .................
2
Vacuum Assisted .......
5
(d)
Sludge Eluirialion .............................
5
(e)
Sludge Conditioner (chemical or thermal) ........
5
(f)
Sludge Thickener (gravity) ......................
5
(g)
Dissolved Air Flotation Unit
(not applicable to a unit rates as (3) (i) .........
8
(h)
Sludge Gas Utilization (including gas storage) . ...
2
(i)
Sludge Holding Tank - Aerated ................
5
Non aerated ............
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 Applicalion (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
,INFECTION
(a)
Chlorination ........................ .....
(b)
Dechforination ........................
5
(c)
Ozone ..............................
5
(d)
Radiation ..........................
5
Facilities having treatment processes for the removal of metal
or cyanide will be assigned a minimum classification of Class It.
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class
Ill.
In-planl processes and related control equipment which are an
integral part of industrial production shall not be considered waste
treatment. Likewise, discharges of wastewater from residences
having a design flow of 1,000 gpd or less, shall nol be subject to
rating.
ADDITIONAL COMMENTS:

IDEFINITIQN,5
(1)Acliv21ed Carbon Beds. A physic allchemicaI method for reducing soluble organic material from wastewater
effluent; the column -type beds used in this method will have a flow rate varying from two to eight gallons per
minute per square fool and may be either upflow or downllow carbon beds. Carbon may or may not be
regenerated 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 matter is reduced through artificially accelerated transfer of oxygen on a flow -Through basis:
(3)Aeralion. A process of bringing about intimate contact between air or high purity oxygen in a liquid by
spraying, agitation diffusion;
(4)Agriculturally 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 adjustment)
with the ammonia then released to the atmosphere by physical means; or other similar processes which remove
petroleum products such as benzene, toluene, and xylene.
(6)Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high
temperatures which volatilize and oxidize the absorbed impurities;
(7)Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent limits.
(e)Cenlrifuge. A mechanical device in which centrifugal force is used to separate solids from liquids and/or to
separate liquids of different densities.-
(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 application 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 rale as separate system.
(i 0)Chemical 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 its application to a dewalering device;
(11)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 to 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 SOD and Nitrogenous Removal by Nitrification - A single stage system
'designed' to achieve 'advanced' permit effluent limits on SOD and ammonia nitrogen within the same biological
reactor.
(13)De-chlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical
process;
(14)Denilrificalion Process. The conversion of nitrate -nitrogen to nitrogen gas;
(IS)Eleclrodialysis. Process for removing ionized sails from water through the use of ion -selective ion-
exchange membranes;
(16)Filler Press. A process operated mechanically for partially dewalering sludge;
(17)Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing
excessive amounts of detergent materials through the introduction of air in the form of fine bubbles; also called
foam fractionation;
(18)Gril Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19)lmhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower
sludge digestion chamber;
(20)lnslrumented Flow Measurement. A device which indicates and/or records rate of flow;
(21)lon Exchange. A chemical process in which ions from two different 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 (i.e., chisel plow); (not
appiscaote for types of sludge described in (11) of this Rule); (b)Treaied Effluent. The process of spraying
treated wastewater onto a land area or other methods of application of wastewater onto a land area as a means
of final disposal and/or treatment;
(23)Micro scree n. A low speed, continuously back -washed, rotating drum filter operating under gravity
conditions as a polishing method removing suspended solids from elfluenl;
(24)Nilrificalion Process- The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to
oxidized nitrogen (usually nitrate);
(25)Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of
converting ammonia nitrogen to nitrate nitrogen;
(26)Phosphate 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 wish sufficient detention to allow for the
settling of finely suspended solids;
(2$)Post Aeration. Aeration following conventional secondary treatment units to increase effluent D.O. or for
arty other purpose;
(29)Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a
nonmechanical, gravity means of flowing down a series of steps or weirs; The flow occurring across the steps or
weirs moves in a fairly thin layer and the operation of 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 activity
and organic absorption by using powdered or granular activated carbon; Virgin and/or regenerated carbon is feed
controlled into the system;
(31)Preaeration. A tank 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)lndustrial Pretreatment: (a)Pre-treatment Unit, Industrial. The conditioning of a waste at its source before
discharge, to remove or to neutralize substances injurious to sewers and treatment processes or 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-treatment Program, Industrial - must be a Slate or EPA required program to
receive points on the rating sheet;

(34)Primary Clarifiers. The first settling tanks through which wastewater is passed in a treatment works for
the purpose of removing settleable and suspended solids and BOD which is associated with the solids:
(35)Pumps. All influent, effluent, and in -plant pumps;
(36)Radialioo. Disinfection and/or sterilization process utilizing 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 so€ids;
(38)Rotaling Biological Contactors. 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)lnlermitlenl Biological. Filtration of effluent following septic tanks, lagoons, ar soma other
treatment process in which further biodecomposition is expected to produce desired effluents; Hydraulic loading
rates on these fillers are computed in gpdrac and have a resulting low gpmisf (less than one); (b)Recirculating
biological - the same type of sand filter as z `ned in (a) with the added capability to recycle effluent back
through the sand filter;
(4o)Sand or Mixed -Media Filters- A polishing process by which effluent limits are achieved through a further
reduction of suspended solids.(a)low rate -- gravity, hydraulically loaded filler with loading rates in the one to
three gpm/sf range;(b)high rate -- a press hydraulically loaded filler with loading rates in the five gpmisf
range; At any rate, the loading vale 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 of the contact stabilization process where the activated sludge is
transferred to a tank and aerated before returning it to the basin;
(43)Seplic Tank. A single -story settling lank in which settled sludge is in contact with the wastewater flowing
through the tank; 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;
(44)Sludge Digeslion. The process by which organic or volatile matter and sludge is gasilied, liquefied,
mineralized or converted into more stable organic matter through the activity of living organisms, which includes
aerated holding tanks;
(45)Sludge Drying Beds. An area comprising natural or arlificial layers of porous materials upon which digested
sewage sludge is dried by drainage and evaporation;
(46)Sludge Elutriation. 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 tank (Aerated and Nonaerated}. 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 (Le,
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
dewatering and would not allow long periods (several days of detention) without resulting odor problems;
(49)Sludge Incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials
and reduce the sludge to a sterile ash;
(SO)Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and pulrescrible,
and to reduce the pathogenic organism content; This may be done by pH adjustment chlorine dosing, or by heat
treatment;
(51)Sludge Thickener. A type of sedimentation lank ir, which the sludge is permitted to settle and thicken through
agitation and gravity;
(52)Slabilizalion Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter is effected by
natural transfer of oxygen to the water from air (not a polishing pond);
(53)Sland-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)Terliary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent
polishing; A settling lagoon or sand or coal filter might be employed for this purpose.
(56)Thermal Pollution Control Device. A device providing for the transfer of heat from a.11uid flowing in tubes to
another fluid outside the tubes, or vice versa; or, other means of regulating
liquid temperatures;
t57)Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of lime to
improve the dewalerabilify of sludge by the solubilizing and hydraulizing of the smaller and more highly hydrated
sludge particles;
(58)Toxic Materials. Those wastes or combinations of wastes including disease -causing agents which after
discharge and upon exposure, ingestion, inhalation or assimilation into any organism either directly from the
environment or indirectly by ingestion through food chains, will cause death, disease, behavioral abnormalities,
cancer, genetic mutations, physiological malfunctions (including malfunctions in reproduction) or physical
deformations, in such organisms or [heir offspring; Toxic materials include, by way illustration and not
limitation: lead, cadmium, chromium, mercury, vanadium, arsenic, zinc, ortho-nitro-chlorebenzene (ONCB
polychlorinated biphenyls (PCBs) and dichlorodiphenyl trichloroethans (DOT); and any other materials that have
or may hereafter be determined to have toxic properties;
(59)Trickling filler. A biological treatment unit consisting of material such as broken stone or rock over which
wastewater is distributed; A high rate trickling filler is one which is operated at between 10 and 30 mgd per
acre. A low rate trickling filter is one which is designed to operate a1 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 filtrale 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 nilrified 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.