WQ0006122_Final Permit_19960926

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
IqT4 '�VA
ffl�.
A& 0
L? FE 1---I N F�
September 26, 1996
Mr. Billy R. Leggett, District Engineer
North Carolina Department of Transportation
Post Office Box 928
Plymouth, North Carolina 27962
Subject: Permit No. WQ0006122
North Carolina Department of
Transportation
Asphalt Manufacturing Plant
WasteWater;Recycle System
Washington County
Dear Mr. Leggett:
In accordance with your application received July 23, 1996, we are forwarding herewith Permit
No. WQ0006122, dated September 26, 1996 to the North Carolina Department of Transportation for the
continued operation of the subject wastewater recycle system.
This permit shall be effective from the date of issuance until August; 31, 2001 shall�,void Permit
No. WQ0006122 issued April 13, 1992, and shall`be subject to the conditions and limitations as specified
therein. Please pay particular attention to the r. anitoring requirements in this permit. Failure to establish
an adequate system for collecting and maintaining the required operational informationwillresult in future
compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of
this permit. This request must b.e 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 274,47,
Raleigh, NC 27611-7447. Unless such dem,-- nds are made -this permit shall be final and: binding
If you need additional information concerning.this matter, please contact Rick Moore at (91'9)�733-
5083 extension 527.
Sincerely,
A. Presto oward, Jr., P.E.
cc: Washington County Health Department
Washington Regional Office, Water Quality Section
Training and Certificadon Unit
Facilities Assessment Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equaf opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

P&

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
RECYCLE 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
North Carolina Department of Transportation
Washington County
•; M
continued operation of a 19,200 GPD wastewater recycle system consisting of a 20 foot by 45 foot by 5
foot deep settling basin connected in series with a 410 foot by 500 foot by 15 foot deep pond {old 4 acre
sandpit} for removal of sand particles from scrubber water generated to serve the North Carolina
Department of Transportation's Creswell asphalt manufacturing plant with no discharge of wastes to the
surface waters, pursuant to the application received July 23, 1996 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 August 31, 2001, shall void Permit
No. WQ0006122 issued April 13, 1992, and shall be subject to the following specified conditions and
limitations:
This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
2. The facilities shall be properly maintained and operated at all times.
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 Water Quality accompanied by an application fee,
documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of the request will be considered on its merits and may or may
not be approved.
4. 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
actions that may be required by this Division, such as the construction of additional or
replacement treatment or disposal facilities.
5. The residuals generated from these treatment facilities must be disposed in accordance with
General Statute 143-215.1 and in a manner approved by the North Carolina Division of
Water Quality.

6. 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.
7. 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.
Diversion or bypassing of untreated wastewater from the treatment facilities is prohibited.
9. Freeboard in the settling basin shall not be less than one foot at any time.
10. Any monitoring deemed necessary by the Division of Water Quality to insure surface and
ground water protection will be established and an acceptable sampling reporting schedule
shall be followed,
11. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
12. The Permittee or his designee shall inspect the wastewater recycle 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 maintain 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 to the Division of
Water Quality or other permitting authority, upon request.
13. Any duly authorized officer, employee, or representative of the Division of Water Quality
may, upon presentation of credentials, enter and inspect any property, premises or place on
or related to the recycle system at any reasonable time for the purpose of determining
compliance with this permit, may inspect or copy any records that must be maintained
under the terms and conditions of this permit, and may obtain samples of groundwater,
surface water, or leachate.
14. 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 15A NCAC 2H .0205
(c)(4).
15. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Water Quality in accordance with
North Carolina General Statute 143-215.6(a) to 143-215.6(c).
16. 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.
17. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of this project.

18. Noncompliance Notification:
The Permittee shall report by telephone to the Washington Regional Office, telephone
number [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 renders 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; or
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 five (5) 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.
19. 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.
20. 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 26th day of September, 1996.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A_ Preston H ward, Jr., P.E.j Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0006122
3

RATIIQC: SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: 44crt k V-0-Vt6r4lkt-L . o_ -
-)wner or Contact Person: ' l s c
Aailing Address: 70 x Z C Glv�
0nLinty' efephane:-
Present Cfassification: e 1 New Facility Existing Facility_ie—'
N PDES Per. No. NC00 Nondisc. Per. No.WQ QC0�Q t Z Z Health Dept.Per No.
Rated by: Telephone: q ktt - SLA-(cL}S 1 Date: C)A- kci -614o
Reviewed by-, Health Dept. Telephone:
Regional Office Telephone: Ir G 6y�1
Central Office Telephone:
ORC: Grade: Telephone:
Check Classifications): Subsurface Spray Irrigation Land Application
Wastewater Classification: (Circle One) 0 Ii III IV Total Points:
SUBSURFACE CLASSIFIC.ATM
(check all units that apply)
1. septic tanks
2. pump tanks
3, siphon or pump -dosing systems
a. sand filters
grease trapAnterceptor
oil/water separators
7, gravity subsurface treatment and disposal:
a. pressure subsurface treatment and disposal:
S?RAY I RRIG ATION CLASSI FICATION
(check all units that apply)
1-
preliminary treatment (definition no. 32 }
2,
lagoons
3.
septic tanks
4.
pump tanks
5.
pumps
6.
sand filters
7.
grease trapCnterceptor
a.
oil/water separators
9.
disinfection
10.
chemical addition for nutrient/algae control
11.
spray Irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater In excess of these components shrill
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATIONIRESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of bicsolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a cases-by-casa basis: (Check ' Appropriate)
1. OiVwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Seplic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand tillers, disinfection
and direct discharge;
3, Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed-loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6. Aquaculture operations with discharge to surface waters;
Water Plant sludge handling and back -wash water treatment;
Seafood processing consisting of screening and disposal.
Single-family discharging systems, with the exception of Aerobic Treatment Units, will be ciassified if permitted alter July 1,
1993 or if upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

I-tle toylowing scale is used for rating wastewater treatment facilities: (circle appropriate points)
rrEM POINTS
(1) Industrial Pretreatment Unlis or Industrial Pretreatment Program (see definhlcn No. 33) ...................................................4
(2) DESIGN
FLOW OF PLANT IN gpd {rat applicable to non -contaminated cooling waters, sludge handling facilities for
water purification plants, totally dosed cycle systems(see definition No. 11), and facilities consisting only of hem
(4)(d) or Items (4)(d) and (11)(d)]
0 - 20,000.................................................................................................................................................1
20.001 - 50,000 ............ .............................................................................................I........-...................2
50.001 - 100.000.....................................................................................................................................3
100.001 - 250,000..................................................................................................................................A
250.001 - 500.000 ................. ........................................................................... ................. ...................... 5
500,001 - 1,000,000................................................................................................................................8
1,000,001 - 2,000,000...........................................................................................................................10
2.000,001 (and up) rate 1 poirx additional for each 200,000 gpd capacity up to a maximum of .................30
Design Flow (gpd)
(3) PRELIMINARY
UNITSIPROCESSES (see dafinirion No.32)
(a)
Bar Screens...............................................................................................................................................1
(b)
Or
Mechanical Screens, Static Screens or Comminuting Devices..........................................................«..............2
(c)
Grh Rerroval..............................................................................................................................................i
(d)
or
Mechanical or Aerated Grk Removal............................................................................................................. 2
(e)
Flow Measuring Davlca................................................................................................................................1
(f)
or
Instrumented Flow Measurement................................................................................................................2
(g)
Preaeratlon...............................................................................................................................................2
(h)
Influent Flow Nualization..........................................................................................................................2
(1)
Grease or Oil Separators - Gravity.................................................................................................................2
Mechanical................................................................................................................................................3
DissolvedAir Flotation ................................................................................................................................8
(I)
Prechlorination..........................................................................................................................................5
(4) PRIMARYTRF-ATMENTUVrrSIPROCESSES
(a)
Septic Tank (see definition No. 43)- ................... . .................................................. .............. I . . ........ 2
(b)
Imhoff Tank.............................................................................................................................................5
(c)
Primary Clariflers..........................................................................................................................................5
(d)
Settling Ponds or Settling Tanks for inorganic Non-toxic Materials (sludge handling facilities for water
purification plarts, sand, gravel, stone, and other mining operations except recreational activities such as gam
or golf mining) .................. ................................................ ....................................................................
�
(5) SECONDARYTREATME4T11Nn'WPROCESSES
(a)
Carbonaceous Stage
(1) Aeration -High Purity Oxygen System...............................................................................20
DiffusedAlr System.......................................................................................................10
Mechanical Air System (fixed. floating or rotor)..................................................................8
Separate Sludge Raaeration.............................................................................................3
(€1) TrickJIng Fllter
HighRate ........ ................... ............................................................................ ....._..........7
Standard Rate..........................................................................-------_.............................
PackedTower................................................................................................................5
(€if) Biological Aerated Fitter or Aerated Biological Filter ..... ............... ............... _...... ........ ..._.10
(Iv) Aerated Lagoons........................................................................................................ 10
(v) Rotating Biological Contactors......................................................................................10
(VI) Sand Filters -Intermittent biological ...................... ._........__................................. ............... 2
Recirculatingbiological....................................................................................................3
(vll) Stabilization Lagoons.....................................................................................................5
(vill) Clanlier..........................................................................................................................5
(Ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrdieation (see definition No. 12)(Points for this hem have to be in addition to hems
(5){a)(f) through (5)(a)(viil),
utilizing the extended aeration prooess (see derinhion No.3a)...........................................2
utilizing other than the extended aeration process............................................................8
(x) Nutrient additions to enhance BOO removal......................................................................5
(xl) Biological Culture ('Super Bugs')addhion..........................._............................................5
(b)
Nitrogenous Stage
(I) Aeratlon - High Purity Oxygen System.............................................................................20
Diffused Air System......................................................................................................A 0
Mechanical Air System (fixed, floating or rotor) ................. ................. ................................
Separate Sludge Reaeration.............................................................................................3
(It) Trickling Fllter-High Rate...................................................................................................7
Standard Rata...............................................................................................................
PackedTower.................................................................................................................5
011) Biologlrai Aerated Fllter or Aerated Biological Finer. ................... . ............ ... .......... ..... . .... 1 0
(Iv) Rotating Biological Contactors......................................................................................t 0
(v) sand Fifler- intermittent bloioglcaf................................................................................... 2
Recirculating biological.....................................................................................................3
(vi) Claririer..........................................................................................................................5
(6) TERTIARY ORADVANCED TREATMENT UNIiWPROCESSES
(a)
Activated Carbon Beds -
wilhout carbon regeneration................:.................................................................................5
wf3hcarbon regenerallon.....................................................................................................:.15
(b)
Powdered orGranular ActNatedCarbon Foed-
-without carbon regeneration..................................................................................................5
•whh carbon regeneralion.....................................................................................................15
(c)
Air stripping.............................................................................................................................................5
(d)
Denitrification Process ...... .......................................................................................................... .............. 10
(e)
Electrodialysis .............. ......................................................................... ..................................................... .5
(1)
Foam Separation........................................................................................................................................5
(g)
Ion Exchange.............................................................................................................................................5
(h)
Land Appllcalian of Treated EHIuent (sea definition No. 22b) (rat applicable for sand, gravel, stone
and other similar mining operations) by high rate infiftration............ ........... ................. .. ........... _.... ......... .....A
(1)
M€croscreens.............................................................................................................................................5
())
Phosphorous Removal by Siologlca! Processes (See derinrllonNo. 26) ........................................................20
(k)
Polishing Ponds - without aeration ............... _......................... ..................................................... .............. 2
withaeration..................................................................................................................5

Facilitles having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will tae assigned a minimum classfflcallon of Class ll.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facit'rties having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class Ill.
-------------------------------------------------------------
A004 DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physlcaVchemical method for raducing 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 foot and may be either upflow or downficw 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 b€ofog€cai oxidation or organic matter Is reduced through artificially
accelerated transfer of oxygen on at flow-through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen In a liquid by spraying, agitation or difluslon;(3a) Extended
Aeration, An activated sludge process utilizing a minimum hydraulic detention lime of 18 hours.
(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 convetted 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 xyiene;
(6) Carbon Regeneratlom 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;
'a) Centrifuge. A mechanical device in which centrifugal force 1s used to separale solids from liquids or to separate liquids of ddferent dans'rias;
Chemical Addition Systems- The addition of chemlcal(s) to wastewater at an appllcatlon point for purposes of Improving solids removal, pH adjustment,
callnity control, etc,; the capability to experiment with different chemicals and different applicatlon points to achieve a specific result will be considered one
system; the capability to add chomical(s) to dual units will be rated as one system; capability to add a chemical at a different appllcallon points for different
purposes will result In the systems being rated as separate systems;
(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 applicatlan to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for contalnmenl of wastewater containing inorganic, non-toxic materials from sand, gravel,
crushed stone or other similar operations. Such syslems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system regvfred to achieve permit effluent limits on BOD
and afnrnonia nitrogen within the same bio cgical reactor,
(13) Dechlorinatlon. The penial or complete reduction of residual chlorine In a liquid by any chemical or physical process;
(14) Danflrification Procass. The conversion of nitrate-nitropen to n4rooen oas;
(I)
Post Aeration - cascade ................................ ........................,.....................................................................0
diffusedor mechanical........................................................................................................2
(m)
Reverse Osmosis ............................................. ............................................................................................5
(n)
Sand or Mixed -Media Fillers - low rale ...................... _....................................... ........................................... 2
highrate......................................................................5
(o)
Treatment processes for removal of mesal or cyanide...................................................................................1 5
(p)
treatment processes for removal of toxic materials other than metal or cyanide..............................................1 5
(7)
SLUDGETREATMENT
(a)
Sludge Digast'ton Tank - Heated (anaerobic)...............................................................................................10
Aerobic. ............... ..............................................................................................................................5
Unheated(anaerobic)...............................................................................................................................3
(b)
Sludge Stabilization (chemical or thermal)...................................................................................................5
(c)
Sludge Drying Beds - Gravity......................................................................................................................2
VacuumAssisted.......................................................................................................................................5
(d)
Sludge Elutdation.......................................... ............................................................................................5
(a)
Sludge Conditioner (chemical or thermal).....................................................................................................5
(f)
Sludge Thickener (gravity)..........................................................................................................................5
(g)
Dissolved Air Flotation Unit (not applicable to a unit rated as(3)(1)j.............................................................8
(h)
Sludge Gas Utilization (including gas storage).............................................................................................2
(1)
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...................................................1 0
(8)
RESIDUALS UTILIZATIONIDISPOSAL (Induding incinerated ash)
(a)
Lagoons ..... ........................ I............, 2
......................................................................................................
(b)
Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
orlandfill paraft........................................................................................................................................2
(c))
Dedicated Landfill(burial) by the permittee of the wastewater treatment facility...............................................5
(s)
(a)
Chlorination..................................................... .........................................................................................5
(b)
Dechlorination............................:..............................................................................................................5
(c)
Ozone........................................................................................................................................5
(d)
Radiation_ .... .... .... .... ..............................................5
(10)
CHEMICAL ADDITION SYSTEM(S) ( see def€ninon No. 9) (not applicable to chemical additions rated as item (3)0),
(5)(a)(xi),
(6)(a), (6)(b), (7)(b), (7)(e), (9a), (9)(b) or (9)(c) 5 points each -
List.....................................................................................................................................5
.......................................................... . .............I .................... ,.................................... 4
.............................................................................................................. ..................5
.............................................. .......... ........ ....................... ................ ....... I ....... I ....... I....... 5
(1 1)
MISCB-LANEOUS UNITSIPROCESSES
(a)
Holding Ponds, Holding Tanks or Settling ponds for Organic or Toxic Maierfals lnclud3ng wastes from mining
operations coria€ping nitrogen or phosphorus compounds In amounts significantly greater than la common
fordomestic wastewater............................................................................................................................4
(b)
Effluent Flow Equalization (not applicable to storage basins which are inherent In land application systems).....2
(c)
(d)
Stage Discharge (not applicable to storage basins inherent In land application systems) ..............................
Pumps...................................................................................................................................................3
(e)
Stand -By Power Supply............................................................................................................................
(f)
Thermal Pollution Control Device.................................................................................................................3
TOTALPOINTS..........................................................................fir _
CLASSIFICATION
ClassI...........................................................................................................5-25 Points
Class11 .............................................. ........................................................... 26-50 Points
Class III .............. .................................. .............. .......................................... 51-65 Points
Class1V .......... ............................................................................................. 66 -Up Points
Facilitles having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will tae assigned a minimum classfflcallon of Class ll.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facit'rties having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class Ill.
-------------------------------------------------------------
A004 DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physlcaVchemical method for raducing 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 foot and may be either upflow or downficw 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 b€ofog€cai oxidation or organic matter Is reduced through artificially
accelerated transfer of oxygen on at flow-through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen In a liquid by spraying, agitation or difluslon;(3a) Extended
Aeration, An activated sludge process utilizing a minimum hydraulic detention lime of 18 hours.
(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 convetted 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 xyiene;
(6) Carbon Regeneratlom 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;
'a) Centrifuge. A mechanical device in which centrifugal force 1s used to separale solids from liquids or to separate liquids of ddferent dans'rias;
Chemical Addition Systems- The addition of chemlcal(s) to wastewater at an appllcatlon point for purposes of Improving solids removal, pH adjustment,
callnity control, etc,; the capability to experiment with different chemicals and different applicatlon points to achieve a specific result will be considered one
system; the capability to add chomical(s) to dual units will be rated as one system; capability to add a chemical at a different appllcallon points for different
purposes will result In the systems being rated as separate systems;
(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 applicatlan to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for contalnmenl of wastewater containing inorganic, non-toxic materials from sand, gravel,
crushed stone or other similar operations. Such syslems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system regvfred to achieve permit effluent limits on BOD
and afnrnonia nitrogen within the same bio cgical reactor,
(13) Dechlorinatlon. The penial or complete reduction of residual chlorine In a liquid by any chemical or physical process;
(14) Danflrification Procass. The conversion of nitrate-nitropen to n4rooen oas;

1151 Electrodlalvsts. Process for removing Ionized sats from water through the use of lon-sefective Ion -exchange membranes;
116} 01or Press. A process operated mechanically for parllally dewatering sludge; '
uaN ,4au�1. T ile planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the Introdunlon of air In the form of fine bubbles; also called foam fractionation;
(16) Grit Removal. The process of removing grit and other heavy mineral matter from waslewater,
(19) Imhoff Tarek A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower sludge dlgestlon chamber.
(20) Instrumented Flow Measurement, A device which Indicates and records rate of flow;
(21) Ion Exchange. A chemical process in which ions from two d€lfarent molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land erlher by spraying on the surface or by subsurface Injection
(I.e., chisef plow); [not applicable for types of sludge described in (11) of this Rule);
;u) Trbalad Ellivant. 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 or treaimant;
(23) Microscrear, A low speed, continuously back -washed, rotating drum filler operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidlzed nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nllrale);
(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 oxWanoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) Polishing Pond. A holding pond following secondary treatment with sufficient detention time to allow setiling of finely suspended solids;
(28) Post Aeration. Aeration following conventional secondary treatment units to Increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a nonm8chanicat, gravity means of flowing down a
series of steps or weirs; The Ilow 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 slop to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon Is teed controlled Into the system;
(31) Preaerallon. A tank constructed to provide aeration pftr to primary treatment;
(32) Preliminary Urths. Unit operations in the treatment process, such as screening and comminution, that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment Lint, 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 the 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 State 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 susperOGd
solids and SOD which Is associated with the solids;
(35) Pumps. All influent, effluent and in -plant pumps;
(36) Radiation. Disinfection or sterilization process ulllizing 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) Rotating Biological Contractors. 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) Intermittent Biological. Fhratlon of effluent following sepik tanks, lagoons, or some other treatment process in which further blodecomposhlon is
expected to produce desired effluents; hydraulic loading rates on these fihers are computed In gpolac and have a resulting low gprrVsf (fess than one);
b) Recirculating biological - the same type of sand fitter as defined in Subparagraph (39) (a) of this Rule with the added capability to rerycia effluent back
through the sand liner,
(40) Sand or Mixed-Medla Fitters. A polishing process by which effluent Ilmhs are achieved through a further reduction of suspended solids;
(a) low rate — gravity, hydraulically loaded filter with loading rates In the one to three gprrvsf range;
(b) high rate -- a pressure, hydraulically loaded liner with loading rates in the five gprrVsf range; Al any rate, the loading rate will exceed three gprrVsf;
(41) Secondary Clarifiers. A lank which follows the blologicaf unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reaerailan. A part of the contact stabilization process whore the activated sludge Is transferred 10 a tank and aerated before returning It
to the contact basin;
(43) Septic Tank A single -story settling tank In which settled sludge Is In contact with the wastewater flowing through the tank; shall not be applicable for
septic lank systems serving singfe family residences having capacity of 2,000 gaffons or less which discharge to a nitr€ficalion field;
(44) sludge. Digestion. The process by which organic or volatile mailer and sludge is gasified, 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 artificial layers of porous malerials upon which digested sewage sludge Is dried by drainage and
evaporation;
(46} Sludge Elviriatlon. A process of sludge condilioning in which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas LJIIIization. The process of using sewage gas for the purpose of heating buildings, driving engiries, etc.;
(4e.) Sludge Bolding Tank (Aerated and Nonaerated). A lank utilized for smal[ wastewater treatment plants not containing a digester In which sludge may be
kept fresh, and supematant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a rmal] 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 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 10 a sterile ash;
(50) Sludge Slabilizallon (Chemical or Thermal). A process to make treated sludge less odorous and putrescible, and 10 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 Oudge Is permitted to settle and thicken shrough agitation and gravity;
(52) Slabilization Lagoon. A type of oxidation lagoon In which biological oxidation of organic matter Is affected by natural transfer of oxygen 'to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On site or porlable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, Including non biodegradable particulate (fioatable solids, suspended solids and BOD
reduction) from municipal and Industrial wastewater treatment systems;
(55) Tertiary Treatment. A stage of treatment foiJowing secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal fitter
might be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing in tubes to another fluid outside the tubes, or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to Improve the dewalarabilny of sludge by the
solubilizing and hydraullzing of the smaller and more highly hydrated sludge panicles;
(58) Toxic Materials. Those wastes or combinations of wastes, Including disease-caysing agents which after discharge and upon exposure, Ingestion. Inhalallon
or ass€milatlon into ary organism, either directly from the environment or indirectly by Ingestion through lood chains, will cause death, disease, behavioral
abnormalifies, cancer, gonelic mutations, physiological malfunctions (Including maHunctions In reproduction) or physical de(ornalJons. In such organisms or their
offspring; Toxic materials Include, by way of illustration and not limitation: lead, cadmlum, chromium, mercury, vanadium, arsenic, zinc, Ortho-nftro-cNorobe nzene
(ONCE), polychlartnaled biphenyls (PCBs; and dlchiorodiphenyl irlchfaroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling lFher. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater is dislnbuled; A high rale trickling
filter Is one which operated al between 10 and 30 mgd per acre. A low rate trickling fitter Is one which is designed to operate al one to lour mgd per acre:
(60) Trickiing Finer (Packed Tower). A plug flow type of operation In which wastewater flows down through successive layers of media or fifirato material; Organic
material Is removed continually by the active biological fixed growth In each succesWve layer, This method may produce 'secondary" quality effluent, or may be
adapled to produce a nitrifled effluent;
(61) Vacuum Finer, Centrhupes, or Filter Presses- Devices which are designed to remove excess water from either digested or undigested sludge prior to disposal
or further treatment,

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