WQ0000185_Final Permit_19920518

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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 18, 1992
Mr. William S. Richardson, County Manager
Currituck County
Post Office Box 39
Currituck, North Carolina 27929
Subject: Permit No. WQ0000185
Currituck County
Ocean Sands
Wastewater Treatment and
Disposal Facility
Currituck County
� Mr. Richardson:
In accordance with your application received March 20, 1992, we are forwarding herewith Pernlit
No. W.QW00185, dated May 18, 1992, to Currituck County for the subject Wastewater Treatment and
Disr-osal Facility. This permit amendment consists of the addition of a fume scrubber system capable of
ren.nving 99.8% of H2S from the air stream.
This permit shall void Permit No. WQ0000185 issued January 27, 1989 and shall be effective
from the date of issuance until January 31, 1994, 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
estab' .sh an adequate system for collecting and maintaining the required operational information will result
in fuare compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable to you, you have
th,: 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.
I
Regional Offices
eville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
:.,,"51-6208 919/486-1541 704/663-1699 919f733-2314 919/946-6481 919/395-3900 919(761-2351
Pollution Prevention Pays
P.O. Boz 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
.formation concerning this matter, please contact Ms. Angela Y. Griffin at 919/ 733-5083.
ely,
George T.
cc: Currituck County Health Department
Washington Regional Office, Water Quality
Washington Regional Office, Groundwater
Groundwater Section, Jack Floyd
Training and Certification Unit
Facilities Assessment Unit
is

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
HIGH RATE INFILTRATION 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
Currituck County
Currituck County
FOR THE
continued operation of a 300,000 GPD tertiary wastewater treatment plant consisting of one (1) 25,000
GPD aerated influent surge tanks, one (1) 35,000 GPD aerated influent surge tanks, a flow splitter box,
six (6) 50,000 gallon aeration tanks, six (6) 8,335 gallon clarifiers, six (6) 5,000 gallon sludge holding
tanks, six (6) 165 CFM blowers, four (4) tertiary filters two (2) with 35 ft2 cells and two (2) with 42 ft2
cells, chlorination facilities, three (3) chlorine contact tanks with a total volume of 7, 289 gallons, and
standby power. Continued operation is also granted for the existing disposal facilities which consist of
five (5) 50,000 GPD, 100 -foot diameter rotary distributors, a 26,000 GPD, 16,500 ft2 subsurface field
(5,500 linear feet of pipe in 3 foot wide trenches), with the ultimate disposal of up to 600,000 GPD of
treated effluent using a total of ten (10) rotary distributors of 60,000 GPD capacity each conditionally
granted subject to the approval and installation of additional wastewater treatment capacity. No
construction of the additional six (6) rotary distributors shall commence until plans and specifications for
the necessary treatment facilities, abandonment of the subsurface drainfield and rotary distributor No. 13
(which is closest to Ocean Trail Road), and the continuation of the line -sink have been submitted and
approved by the Division. Permission is also granted for the construction and operation of a fume
scrubber system capable of removing 99.8% of H2S from the air stream. This system which is designed
to help eliminate odor problems consists of chemical feed equipment, a spray pump, make up water flow
metering, and all associated controls and apparatuses to serve the Ocean Sands Development with no
discharge of wastes to the surface waters, pursuant to the application received March 20, 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. WQ0000185 issued January 27, 1989 and shall be effective
from qe date of issuance until January 31, 1994, and shall be subject to the following ,specified conditions
and limitations:

1IRICO 1::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 Washington 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. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action to correct the
problem, including actions as may be required by this Division, such as the construction of
additional or replacement wastewater treatment or disposal facilities.
4. 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.
Ponding of wastewater on the surface of the distribution field when the dosing cycle
commences shall be considered evidence of failure of the soils to adequately absorb the
wastewater. Additionally, such failure shall be interpreted as a violation of this permit
condition.
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. Adequate measures shall be taken to divert stormwater from the high rate infiltration area
and to prevent wastewater runoff.
7. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
8. 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.
9. The following buffers shall be maintained:
a) 500 feet between high rate infiltration unit and any public works surface supply or
public shallow potable water well.
b) 100 feet between high rate infiltration unit and any "SA" classified surface waters.
C) 50 feet between high rate infiltration unit and any other surface waters.
d) 100 feet between high rate infiltration unit and property lines.
e) 50 feet between treatment units and property lines.
- f) 50 feet between high rate infiltration unit and other treatment units and public right
of ways.
g) 200 feet between high rate infiltration unit and surface or groundwater drainage
systems.

10. A usable green area shall be maintained for wastewater disposal. The green area shall have
the capability of accommodating the average daily flow of the facility being served without
exceeding the loading rates of the green area. A "green area" as defined in 15 NCAC 2H
.0404 (g)(7) is an area suitable for waste disposal, either in its natural state or which has
been modified by planting a vegetative cover of grasses or low growing shrubbery.
11. A minimum of 34.4 acres of green area suitable for use for wastewater treatment and
disposal shall be maintained at all times.
1 11 W 3 16.XT4 I /► :I&TWA FIR ILI 1 310RIUS)1014"1
►� ►
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. Once
the facility is classified, the Permittee must submit a letter to the Certification Commission
which designates the operator in responsible charge.
3. The application rates for the high rate infiltration system shall not exceed:
a) one and one-half (1 1/2) gallons per square foot for the subsurface disposal and,
b) six and one-half (6 1/2) gallons per square foot for the rotary distributors
4. The facilities shall be effectively maintained and operated as a non -discharge system to
prevent the discharge of any wastewater outside the high rate infiltration disposal area
resulting from the operation of this facility.
5. No traffic or equipment shall be allowed on the disposal area except while installation
occurs or while normal maintenance is being performed.
6. The rotary distribution fields shall be raked twice weekly during the months April to
October, and once a week during the months of November to March.
7. The screenings removed from the wastewater treatment plant shall be properly disposed of
in a sanitary landfill.
8. The distribution field(s) shall be kept free of vegetation at all times. There shall be no rotor
tillers used on the rotary distribution field(s). Vegetation must be removed from the field(s)
C manually.
9. The application of chemicals to the distribution field(s) is expressly prohibited.
0
■

10. An automatically activated standby power source shall be on site and operational at all
times. If a generator is employed as an alternate power supply, it shall be tested weekly by
interrupting the primary power source. The length of time that the standby power unit is
operated shall be monitored and reported in the monthly reports described in section III, 3.
The length of time that the standby power is operated due to power outage shall be reported
separately from the time that the standby power is operated for the purpose of routine
exercising.
11. The flow measurement device shall be calibrated annually by a representative. of a firm
which is routinely engaged in the calibration of flow measurement devices. Records of this
calibration, including all information pertinent to the calibration, shall be available during a
.any inspection by Division staff.
12. Diffusers shall be cleaned as needed to assure adequate aeration. Records of maintenance
shall be maintained by the permittee.
13. The chlorine tablets used in the disinfection facility shall be of the kind and type specified
in the plans and specifications approved by the Division.
14. The elevation of the base of each rotary distributor shall be at least 13 feet above mean sea
level (A.M.S.L.).
15. Should the application of treated wastewater to either disposal system result in breakout of
wastewater at any point less than 200 linear feet from the outer edges of the disposal
system, the County of Currituck must restructure the site or modify the system's operation
to eliminate the discharge.
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 effluent from the subject facilities shall be monitored by the Permittee at the point prior
to discharge to the rotary distributor for the following parameters:
Effluent Limit Measurement Sample
Parameter Maximum Monthly Frequency Type
Average
Flow
0.276 MGD
Continuous
Recording
BODS, 5 -day, 20C
20 mg/1
2/month
Composite
TSS Effluent
10 mg/1
2/month
Composite
Fecal Coliform
2/Month
Grab
Residual Chlorine
0.5 mg/l
Daily
Grab
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0
standard units.
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.

3. Three copies of all monitoring data (as specified in condition IIl.2) shall be submitted on
or before of 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
4. A record shall be maintained of all residuals removed from this facility. -The 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 a volume
of residuals removed.
5. A maintenance log shall be maintained at this facility including but not limited to the
following items:
a. Daily sampling results including residual chlorine, settleable matter, and dissolved
oxygen in the aeration basin and at the clarifier weir.
b. Visual observations of the plant and plant site.
C. Record of preventative maintenance (changing of filters, adjusting belt tensions,
alarm testing, diffuser inspections and cleanings, etc.).
d. Date of calibration of flow measurement device.
e. Date and results of power interruption testing on alternate power supply.
f. Dates fields were raked and arms inspected.
6. The terms of this permit will be considered to be violated any time the monthly average
flow for any one month exceeds the design capacity of the constructed treatment and
disposal system. Once this exceedance occurs, no additional wastewater shall be added to
the system until the facility is expanded.
7. Within 60 days following any single month in which the monthly average flow equals or
exceeds 80% of the design capacity of the constructed treatment/disposal system, a permit
amendment must be requested and received by the Division prior to the disposal of any
additional wastewater.
8. Noncompliance Notification:
The Permittee shall report by telephone to the Washington 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 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.

IV.
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 is not in
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.
The five (5) existing monitoring wells must be sampled every March, July, and November
for the following parameters:
NO3
TDS
TOC
pH
Ammonia Nitrogen
Chlorides
Total Coliforms
VOC
Orthophosphate
Water Level
Volatile Organic Compounds - In November only (by Method 1 or Method 2
below)
Method 1: Method 6230D (Capillary - Column), "Standard Methods for the Examination
of Water and Wastewater", 17th edition, 1989.
Method 2: Method 502.2 " Methods for the Determination of Organic Compounds in
Drinking Water", United States Environmental Protection Agency - 600/4-88/039.
2. The measurement of water level must be taken at all five (5) monitoring wells on a monthly
basis from May through September, as well as in March and November, and submitted to
the Division with the groundwater quality monitoring data.
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/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/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.
5. 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
6. 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, December.

7. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
8. No land application of wastewater shall take place when the seasonal high water table is
less than three feet below the surface of the land.
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.
OUNKff xLya"TaYWOM1 0 W 191cm
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.
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.
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 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.

8. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of this project.
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 this the 18th day of May, 1992
�TH CAROLINA E ONMENTAL MANAGEMENT COMMISSION
� n
George T. Ever Director;
Division of Enviro ntal anagement
By Authority of the Envrronn'sental Management Commission
Permit No. WQ0000185

?ermit No. WQ0000185
May 18, 1992
Engineer's Certification
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, for the
Project Name Location
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
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Name of PIant:nzE&& VQ
Owner or Contact Person:
Mailing Address: _-PC'\,.-4,C X
----------------------- --- -----
County: -L;RR iToc K, Te.ep hone:grq 3 -atl��
NPDES Permit No. NC00 Nondisc. Per. No. Wi�cbWJLR -
Issue Date: Expiration Date:
Existing Facility New Facility -
Rated By: �y`� _ Date:-S-Qk
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC
Plant Class: (circle one)
ITEM
POINTS
(1) Industrial Pretreatment Units and/or
Industrial Pretreatment Program
(see definition No. 33)
4
(2) pE�IQN 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 (1 1)
(d))
0 20,000 ..........................
1
20.001 50.000 ..........................
2
50,001 100,000 ..........................
3
100,001 -- 250,000 ..........................
4
250,001 -- 500,000 ..........................
"kz)
500,001 --1,000,000 ..........................
8
1,000,001 -- 2,000,000 ........................
10
2,000,001 (and up) - rate i point additional for each
200,000 gpd capacity up to a
maxi um of 30
Design Flow (gpd) 3C) 1 p6Q
(3) PRELIMINARY UNITS (see oefinition no. 32)
(a) Bar Screens ................................
or
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........... .............
2
(c) GritRemoval ...............................
1
or
—
(d) Mechanical or Aerated Grit Removal ...........
2
(e) Flow Measuring Device .......................
1
or
(f) Instrumented Flow Measurement ..............
(g) Preaeralion................................
2
(h) Influent Flow -Equalization ...................
CD
(i) Grease or Oil Separators - Gravity ..........
2
Mechanical ..........
3
33-- Dissolved Air Flotation.
8
0)'Prechlorination ..............................
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
Grade
II (D IV Total Points!
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System ..... 2
Diffused Air Sysiem ...........
Mechanical Air System (iixed,
floating or rotor) ..............
Separate Sludge Reaeraiior
(ii) Trickling Filter
High Rale ...................
Standard Rale ...............
Packed Tower ...............
(iii) Biological Aerated Filler or Aerated
Eiolooical Filter ...................... 1
(iv) Aerated Lagoons ..................... 1
(v) Rotating Biological Contactors ..........
(vi) Sand Fillers -
intermittent biological .... .
recirculating biological .... .
(vii) Stabilization Lagoons ...................
(viii)C!arifier ..............................
(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 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 ........
(vi) Clarifier ............................... .

�) TERTIARY OR ADVANCED TREATMENT UNIT
(a) Activated Carbons Beds -
without carbon regeneration .................. 5
with carbon regeneration .................... 1 5
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration ................. 5
with carbon regeneration ................... 15
(c) Air Stripping . . ........................... 5
(d) Denitrification Process (separate process) . .. . . 1 0
(e) Electrodialysis .............................. 5
(f) Foam Separation ........:.................... 5
(g) Ion Exchange................................ 5
(h) Land Application of Treated Effluent
(see definition no. 22b) (not applicable for
sand, gravel, clone and other similar mining
operations)
(i) on agriculturally managed sites (See def.
No. 4) ................................... 10
(i i) by high rate infiltration on non-agriculturally
managed sites (includes rotary distributors
and similar fixed nozzle systems) ........... Q
(iii) by subsurface disposal (includes low pressure
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) ............................. 4
(i) Microscreens.................................. 5
(j) Phosphorus Rerno-ial by Biological Processes
(See dei. No. 26) ............................ 20
(k) Polishing Ponds - without aeration ....... 2
with aeration .......... 5
(1) Post Aeration - cascade .............. 0
diffused or mechanical ... 5
(m) Reverse Osmosis .............................. 5
(n) Sand or Mixed-Media Fillers - low rale .......... C)
high rale .......... 5
(o) Treatment processes for removal of metal or
cyanide.................................... 1 5
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ......... 1 5
Si-UDGE TREATMENT
(a) Sludge Digestion Tank - Heated ............... 10 CD
Aerobic ...............
Unhealed ...... ....... 3
(b) Sludge Stabilization (chemical or thermal) .... ... 5
(c) Sludge Drying Beds - Gravity ................. 2
Vacuum Assisled ....... 5
(d) Sludge Elutriation ............................. 5
(e) Sludge Conditioner (chemical or thermal) 5
(f) Sludge Thickener (gravity) ...................... 5
(g) Dissolved Air Flotation Unit
(not applicable to a unit rales 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 Filter, Centrifuge or Filter Press or other
similar dewatering devices .................... 10
6) SLUDGE DISPOSAL (including incinerated ash)
(a) Lagoons........................................ 2
(b) And 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
(S) DISINFECTION
(a) Chlorination ........................ .....
(b) Dechlorination ........................ 5
(c) Ozone .............................. 5
(d) Radiation .......................... 5
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(not applicable to chemical additions rated as it,;m
(3) (j). (5) (a) (xi), (6) (a). (6) (b). (7) (b). (7) (e),
(9) (a), (9) (b), or (9) (c) 5 points each: List:
SbruMNv�dCiftorlcTs-
(11) MISCELLANEOUS UNITS
(a) Holding Ponds, Holding Tanks or Setlling Ponds
for Organic or Toxic Materials including wastes
from mining operations containing nitrogen and/or
phosphorous compounds in amounts significantly
greater than is common for domestic wastewater .......... e
(b) Effluent Flow Equalization (not applicable to storage
basins which are inherent in land application systems).
(c) Stage Discharge (not applicable to storage basins
inherent in land application systems .......................................
(d) Pumps ......... :......................................................................... .......... _...
(e) Stand -By Power Supply................................................................ c
(f) Thermal Pollution Conlrol Device .............................................
TOTAL POINTS 'E,
CLASSIFICATION
Class I ...........................................................
5 - 25 Points
II .... .................................................
26- 50 Points
4lasss
s I11 .. . .................................................
51- 65 Points
ss(V........................................................
66- Up Points
Facilities having a rating of one through four points, inclusive,
do not require a certified operator. Classification of all other
facilities requires a comparable grade operator in responsible
charge.
Facilities having an activated sludge process will be assigned
a minimum classification of Class II.
Facilities having treatment processes for the removal of metal
or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class
III.
In -plant processes and related control equipment which are an
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 not be subject to
rating.
ADDITIONAL COMMENTS:

DEFINITIONS
(t)Activated Carbon Beds. A physical/chemical 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 downflow 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.
(8)Centrifuge. A mechanical device in which centrifugal force is used to separate solids from liquids and/or to
separate liquids of different densities;
(9)Chemic2l 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.
(10)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;
(II)Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing
inorganic, non-toxic materials from sand, gravel, crushed stone or other similar operations, from which there is
no discharge to the surface waters; such systems shall carry a maximum of Iwo points regardless of pumping
facilities or any other appurtenances;
(12)Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nilrificalion - A single stage system
'designed' to achieve 'advanced- permit effluent limits on BOD and ammonia nitrogen within the same biological
reactor.
(13)De-chlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical
process:
(14)Denitrification Process. The conversion of nitrate-nilrogen to nitrogen gas;
(15)Eleclrodialysis. Process for removing ionized salts from water through the use of ion -selective ion -
exchange membranes;
(16)Filler Press. A process operated mechanically for partially dewatering sludge;
(17)Foam Separation. The planned frothing of wastewater or wastewater effluent as z means of removing
excessive amounts of detergent materials through the introduction of air in the form of fine bubbles; also called
foam fractionation;
(18)Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19)lmhoff Tank. A deep two story wastewater lank consisting of an upper sedimentation chamber and a lower
sludge digestion chamber;
(20)lnslrumenied Flow Measurement. A device which indicates and/or records rate of now;
(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); Inol
appttcaoie for types of sludge described in (11) of this Rule); (b)Treated 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)Micros creen. A low speed, continuously back -washed, rotating drum filter operating under gravity
conditions as a polishing method removing suspended solids from effluent;
(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 with sufficient detention to allow for the
settling of finely suspended solids;
(28)Posl Aeration. Aeration following conventional secondary treatment units to increase effluent D.O. or for
any other purpose;
(29)Posl 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 slap 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)Preaeralion. A lank constructed to provide aeration prior to primary treatment;
(32)Preliminary Units. Unit operations in the treatment process, such as screening and comminution, that
prepare the liquor for subsequent major operations;
(33)lnduslrial 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-treatmeni Program, Industrial - must be a Stale 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 Irealmenl works foi
the purpose of removing settleable and suspended solids and BOD which is associated with the solids:
(35)Pumps. All influent, effluent, and in-plant pumps;
(36)Radiation. Disinfection a Alor 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 solids;
(38)Roialing 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)lnlermiltent Biological. Filtration of effluent following septic tanks, lagoons, or some other
treatment process in which further biodecomposition is expected to produce desired effluents; Hydraulic loading
rates on these fillers are computed in gpd/ac and have a resulting low gpm/sf (less than one): (b)Recirculaling
biological - the same type of sand filter as :,ned in (a) with the added capability to recycle effluent back
through the sand filter;
(4CY)Sand or Mixed-Media Filters. A polishing process by which effluent limits are achieved through a further
reduction of suspended solids:(a)low rale -- gravity, hydraulically loaded filter with loading rates in the one to
three gp.n/sf range;(b)high rate -- a press hydraulically loaded filler with loading rates in the five gpm/sf
range; At any rale, the loading rate will exceed three gpm/sf;
(A1)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 lank 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 lank systems serving single family residences having a
capacity of 2000 gallons or less which discharge to a nitrification field;
(44)Sludge Digestion. The process by which organic or volatile matter and sludge is gasified, liquefied,
mineralized or convened 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 artificial 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 lank (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 (i.e.
sludge drying beds); This may be done by adding a small amount of air simply to keep the sludge fresh, but not
necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated lank would
simply be used to decant sludge prior to dewatering and would simply be used to decant sludge prior to
dewalering and would not allow long periods (several days of detention) without resulting odor problems;
(49)Sludge Incinerators. A furnace designed to burn sludge and to remove all moisture and combustible materials
and reduce the sludge to a sterile ash;
(50)Sludge Stabilization (Chemical or Thermal). to process to make treated sludge less odorous and putrescrible,
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 tank in which the sludge is permitted to settle and thicken through
agitation and gravity:
(52)Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic mailer 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
(floatable solids, suspended solids and -SOD reduction) from municipal and industrial wastewater treatment
systems;
(55)Tertiary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent
polishino; A settling lagoon or sand or coal filler might be employed for this purpose.
(56)Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing in lubes to
another fluid outside the tubes, or vice versa; or, other means of regulating
liquid temperatures;
(57)Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of time to
improve the dewaterabilily 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 assimilatioli 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) yr physical
deformations, in such organisms or [heir offspring; Toxic materials include, by way illustration and not
limitation: lead, cadmium, chromium, mercury, vanadium, arsenic, zinc, orlho- nit ro-chlorebenzene (ONC8
polychlorinated biphenyls (PCBs) and dichlorodiphenyl Trichloroethane (DDT); 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 at one to four mgd per acre;
(60)Trickling Filler (Packed Tower). A plug flow type of operation in which wastewater flows down through
successive layers of media or filtrate 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 nitrified effluent;
(61)Vacuum Fillers, Centrifuges, or Filler Presses. Devices which are designed to remove excess water from
either digested or undigested sludge prior to disposal or further treatment.