WQ0007149_Final Permit_19970604

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
June 4, 1997
Mr. Ted W. Fischer,
Vice President & General Manager
United Chemi-Con Manufacturing, Inc.
185 McNeil Road
Lansing, North Carolina 28643
1 • •
r S
1: DEHNF?k
Subject: Permit No. WQ0007149
United Chemi-Con
Plant Influent Water Filtration Facility
Backwash Water Recycle System
Ashe County
Dear Mr. Fischer:
In accordance with your application received April 2, 1997, we are forwarding herewith Permit
No. WQ0007149 dated June 4, 1997 to United Chemi-Con for the continued operation of the subject
backwash water recycle system at the Lansing Plant influent water filtration facility, which filters river
water from the North Fork New River for manufacturing plant process water.
This permit shall be effective from the date of issuance until May 31, 2002, shall void Permit No.
WQ0007149 issued December 18, 1992, and shall be subject to the conditions and limitations as specified
therein. Please pay particular attention to the monitoring requirements in this permit. Failure to establish
an adequate system for collecting and maintaining the required operational information will result in future
compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (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.
If you need additional information concerning this matter, please contact Mr. John Seymour at
[phone] extension 546.
Sincere ,
pe-A. Preston Howard, Jr., P.E.
cc: Ashe County Health Department
Winston-Salem Regional Office, Water Quality Section
Training and Certification. Unit
Facilities Assessment Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

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
United Chemi-Con Manufacturing, Incorporated
Ashe County
FOR THE
continued operation of a 8,600 GPD (20,000 gallon per backwash event) wastewater recycle system
consisting of a 1,000 GPM backwash discharge pump, two clay lined settling lagoons in parallel with a
total capacity of 86,500 gallons and an average detention time of 10 days (one lagoon measuring 48 ft. by
38 ft. by 2 ft. deep and the other lagoon measuring 110 ft. by 36 ft. by 2 ft. deep), a 4 inch overflow
return pipe from each lagoon to the Filter Plant mud well (for the sand filter backwash system which filters
water from the North Fork New River for manufacturing plant use), and all associated controls, piping,
valves, and appurtenances to serve United Chemi-Con Manufacturing Incorporated in Lansing, North
Carolina with no discharge of wastes to the surface waters, pursuant to the application received April 2,
1997, 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 May 31, 2002, shall void Permit No.
WQ0007149 issued December 18, 1992, and shall be subject to the following specified conditions and
Iimitations:
This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other supporting
data.
2. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
3. The facilities shall be properly maintained and operated at all times.
4. 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.

5. 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.
6. The Winston-Salem Regional Office, telephone number 9101771-4600 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.
7. 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.
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 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.
10. Diversion or bypassing of untreated wastewater from the treatment facilities is prohibited.
11. Freeboard in the Lagoons shall be maintained.
12. 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.
13. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
14. 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.
15. 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.
16. 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).
17. 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).

18. 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.
19. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of this project.
20. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem Regional Office, telephone
number 9101 771-4600 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.
21. Any groundwater quality monitoring, as deemed necessary by the Division, shall be
provided.
22. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations in
15A NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary is
for the disposal system individually permitted after December 31, 1983 is established at
either (1) 250 feet from the waste disposal area, or (2) 50 feet within the property
boundary, whichever is closest to the waste disposal area. An exceedance of Groundwater
Quality Standards at or beyond the Compliance Boundary is subject to immediate
remediation action in addition to the penalty -provisions applicable'under General Statute
143-215.6A(a)(1).
In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the
disposal systems midway between the Compliance Boundary and the perimeter of the
waste disposal area. Any exceedance of standards at the Review Boundary shall require
remediation action on the part of the permittee.

23. 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.
24. 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.
Perrnit issued this the 4th day of .Tune, 1997
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
,4 =A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0007149
4

450
WARRENSVILLE QUADRAT\
NORTH CAROLINA—ASHE C
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RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: _ Uy i TEO LHEM 1 - Coal 09A1UFtqG7'uRI.yc- ,Title.
Owner or Contact Person: MR. TED F;SC,4ER
Mailing Address: _ .IFS ljU&�Fr'L Ro, ,, L)9�.Vsi cl /VG a , 16113 _.
County: Telephone:_-- 9/0 -• 3 FY - 25-f /
Present Classification: CLt?55 New Facility Existing Facility [�
NPDES Per. No. NCOO Nondisc. Per. No.WQ_000711Y2 Health Dept.Per No.
Rated by: GEOR&E Sm;Tti _ Telephone: 910- 77/-1y6oO Date: 5-16 -`17
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: BILL Y'71LL s1� Grade: T Telephone., _`Lf0 3PY-2,5_Y1
Check Classification(s): Subsurface Spray Irrigation Land Application
Wastewater Classification. (Circle One) 0 it III IV Total Points:
I�9•e/413'.�� :\ I1 i fi►Ilit� t�. Lu a\I �I� .ra :: .► \Ih . iG : i1 �i \ I Ii : i/� i1 . Lei► .r: ►�
�n►� 11. i . � : I PwAl Iu W\ I jijs rW_Q*1 M61 h.Vjice: \ I. to I7�� �d 7 ►. M \:. W, 0140I► a \
SLUSURFACE ClASS1Fr_ATION
(check all units that appiy)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease trapAnterceptor
6. oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal
SPRAY IRRIGATION CtA.S ACATK)N
(check all units that appiy)
I.
-preliminary treatment (definition no. 32 }
2.
lagoons
3.
septic tanks
4.
pump tanks
5.
pumps
S.
sand filters
7.
grease trapli rite rceptor
8.
oil/water separators
g.
disinfection
10.
chemical addition for nutrient/algae control
11.
spray irrigation of wastewater
In addition to the above cfassiflcatlons, pretreatment of wastewater in excess of these components shill
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
t. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACIUTY CIASSIFICATIC)N
The following systems shall be assigned a Class I classilicafion, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
f. Oillwater Separalor Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filler Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, 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._ 1% Closed -loop Recycle Syslems;
5, Groundwater Remediation Systems consisting only of oVwaler separators, pumps, air -stripping, carbon adsorption, disinfection
and dispos;Jf
5. Aquacufture operations with dischargo to surface waters;
7. Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified it permitted after Judy 1,
1993 or if upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
si :cleans will be notified of the classification or reclassification by the Commission, in wrfting.

The following scale is used for rating wastewater treatment facilities: (circle appropriate poipts)
ITEM POINTS
( 1 ) Industrlaf Pretreatment Units or Indusir1ai Pretreatment Program (see definition No, 33)...................................................4
(2) DESIGN FLOW OF PLANT IN god [not applicable to non -contaminated cooling waters, sludge handling facilities for
water purification plants, totally closed cycle systems(soa definition No. 11), and facilities consisting only of Elam
(4)(d) or Items (4)(d) and (I1)(d)]
0 - 20,000................................................................................................................................................1
20.001 - 50,000.................................... ...................................................................................... ............2
50.001 - 100,000....................................................................................................................................3
103.001 - 250,000.................................................................................. .......................................•.........4
25D,001 500,0Oo................................ •.........•....................................................................................... 5
500.001 1, 000, 000................................................. ........a
1=0,001 - 2,000,000............. .............. .................. .....•.............................. .-.-......».................. ..........1 0
2,D,0,001 (and up) rate 1 point additional for each 200.00G gpd capacity up to a maximum of .................30
Des;gn Flow (gpd)
(3) PRELIMINARY l IgFrS/PROCESSES (see definillon No.32)
(a) Bar Screens...................................•...........................................................................................................1
or
(b) Me_hanicai Screens, Static Screens or Comminuting Devices.................••.......................................................2
(c) Grs•Ramovai..............................................................•...............................................................................1
or
(d) Mec3wicaiorAerated Grl Removal ............. ................................................................................................2
(a) Flaw Measuring Device ................... 1
or
{1) Instrumented Flow Measurement ............. ................................................................................................... 2
(9) Preaerallon.................................
(h) irnfkantFlow Equalization ...................... ........................................................................... ..........................
(€) Grsase or Oil Separators - Gravity ..............................................•..... ....2
Mo:hanical............................ ___ ... ......................... ................................................................... ..............3
❑issotved Air Flotation ..................... ......... ............................................................. ....................................4
{)) Prechlodnallon.........................................................................•...............................................................5
(4) PRIMARYTREA i MENT INrISrPROCESSES
(a) Septic Tank (sea definition No. 43)................................................ .... ............................................... ......... 2
(b) Imrolf Tank..................................................................................................................................•............5
(c) Pfir-lary Ciariflars...............................................................•••...................................................-.-..............-..5
(d) Sapling Ponds or Settling Tanks for Inorganic Non-loxlc MaleHals (sludge handling facilities for water
pur'. cation plants, sand, gravel, stone, and other mining operations except recreational activities such as gem
orgold mining)........................................................................................................................................2
(5) SECONDARY TFEATMENTUNITSrPROCESSES
(a) Ca.00naceous stage
{i) Aeration -High Purity Oxygen System...............................................................................20
DiffusedAir System......................................................................:.:............................. 1 0
Mechanical Air System (fixed, floating or rotor) ............. ..................................................... B
Separate Sludge Reaeratlon............................................... .............................................. 3
{li} Trickling Filler
HighRate.......................................................................................................................7
StandardRate........................................•.................................. 5
PackedTower................................................................................................................5
(ii€) Blological Aerated Filter or Aerated Biological Filter............................................................1 0
(iv} Aerated Lagoons..........................................................................................................10
{v) Rotating Biological Conlactom....................................................................
(vi) Sand Fillers -Intermittent biological..................................................................................2
Recirculatingbiologlcal.....................................................................................................3
(vL} Stabilization Lagoons.....................................................................................................5
Mi.) Clarifier ............................... ..5
(Ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrrfical€on (see definition No. 12)(Points for this item have to be in addition to items
(5)(a)(i) through (5)(a)(viii),
utilizing the extended aeration process (see deffnit€on No.3a)..........................................2
utilizing other than the extended aeration process ..................................................... ....... a
(x) Nutrient additions to enhance BOD removal....................•.................................................5
(xi) Biological Culture ('Super Bugs')addition........................................................................5
(b) N€rogenous Stage
(I) Aeration - High Purity Oxygen System ................... ..........................................................20
DiffusedAir System .......................... .............................................................................1 0
Mechanical Air System (fixed, floating or rotor) ...................................... .................... ....... A
Separate Sludge Reaeration................ ........................... ............................................. .... 3
(IiJ Trickling Flller-Hlgh Rate.... .................................... .... ............................................... ..... 7
StandardRate ........................... ........................................... .......... ...............................
PackedTower............................................................. .....-....,........................................5
(till Biological Aerated Filler or Aerated Biological FFlisr.............................................................1 0
(iv) Rotating Biological Contactors ................... ............................................... .................... 10
(v) Sand Filter- Intermh1enl biological...................................................................................2
Recirculatingbiological .............. ................................ ---.................................................... 3
(vi) (writer .................... ......................... ........................................................ :.... ........
.......5
(8) TERTIARY ORA--VANCEDTREATMFNTUNnWPPOCESSES
(a) Acs,+atad Carbon Beds -
withoul carbon regeneratWn....................................................................................................6
withcarbon regsneratlon.......................................................................................................15
(b) Pondered or Granular Activated Cartoon Feed-
wfihout carbon regoneration....................... .............. ................. ............................... ............ .5
-with carbon regeneration.....................................................................................................15
(c) Air stripping..................•.........................................,.................................................................................5
(d) Dertrificatlon Process..............................................................................................................................1 0
(a) Ele:rodfalysls............•................................................................................................................................5
(f) Foam Separation ........ ....... ........................................... .......... •....................... .................... I., ..............
.....5
(g) for Exchange ...... ..•...................................................................................•...............................................5
(h) Land Appflcatfon of Treated Effluent (see defintion No. 22b) (not applicable for sand, gravel, stone
an-- other similar mining operations) by high rate Infiltration .............................................. ..... ................. _.-A
(i) Mi:•oscrsens............................................ ................................................... .................... ........................... 5
O) PlLsahorous Removal b)` 51ologlcal Processes (See definition No. 26)............................... .......................... 20
(k) Pc shing ponds - without aeration............................................................................................................2
wllhaeration................•................................................................................................5

(I)
Post Aeration - cascade..............................................................................................................................0
diffusedor mechanical........................................................................................................2
(m)
Reverse Osmosis.........................................................................................................................................5
(n)
Sand or Mixed -Media Fiftors - low rate...........................................................................................................2
, high rate......................................................................5
(o)
Treatment process as for removal of metal or cyanide ............................................ ................. .....................
t 5
(p)
treatment processes for removal of toxic materials other than meta) or cyanide.. ....................................... 5
(7)
SLUXWTREATMENT
(a)
Sludge Digestion 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
(i)
Sludge Thickener (gravity)..........................................................................................................................5
(g)
DlssoNed Air Flotation Unit (not appiicable to a unit rated as(3)(1)].............................................................8
(h)
Sludge Gas Utilization (including gas storage).............................................................................................2
(I)
Sludge Holding Tank - Aerated....................................................................................................................5
NOrr-aerated......................................................................,.............................................
2
(j)
Sludge Incinerator (not including activated carbon regeneration)................................................................10
(k)
Vacuum Filter, Centrifuge. or Filter Press or other similar dewatering devices... .............................. .................
10
(8)
RESIDUALS UTILIZATIOWDISPOSAL (including incinerated ash)
(a)
Lagoons..................................................,........................................................2
(b)
Land Application (surface and subsurface) (sea definhion 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
orlandfill permit........................................................................................................................................2
(c)
Dedicated Landfll;(burial) by the permliise of the wastewater treatment iaciflly...............................................5
(9)
DiSi+fEL'TON
(a)
Chlorination.................................................................................................5
(b)
Dechforination...........................................................................................................................................5
(c)
Ozone......................................................................................................................................................5
(d)
Radiation ................................... ...............................................................................................................5
(1 0)
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [not applicable to chemical additions rated as hem (3)(1).
(5)(a)(xi),
(6)(a), (6)(b), (7)(b), (7)(e), (9a), (9)(b) or (9)(c) 5 polnis each;
List.....................................................................................................................................5
........................................................................................................................ . ...........5
....................................................................................................................................5
...................................................................................................
5
(1 1)
MISCELLANEOUS UNITSIPROCESSES
(a)
Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials Including wastes from mining
operations containing nitrogen or phosphorus compounds In amounts significantly greater than is common
fordomestic wastewater............................................................................................................................4
(b)
Effluent Flow Equalizatlon (riot applicable to storage basins which are Inherent In land application systems) ......
2
(c)
Stage Discharge (not appiicable to storage basins Inherent In land application systemsy.................................5
(d)
Pumps..................................................................................................................................... ...........3
(a)
Bland -By Power Suppfy........... ............... .................................................................................................
.3
(f )
Thermal Pollution Control Device ............... .............3
TOTAL POINTS.......................................................................
Ciass I ................................. ............................... ........................................... 5-25
Points
Class11.........................................................................................................26-50
Points
classIll ..................................... .............................................. ..................... 51-65
Points
CiassIV...................................................... .......................... ....................... 66-Up
-------------------------------------------------------------
Poirrts
Facilities having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class It -
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 111.
-0004 DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activaled Carbon Beds. A physlcal/chemical method for reducing soluble organic material from wastewater affluent; The column -type beds used In this
method will have a liow rate varying from two to eight gallons per minute per squaro toot and may be ehher upffow or downfiow carbon bads. 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 biologlcat oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a 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 dlffusion;(3a) Extended
Aeration. An activated sludge process ulilizinb a minimum hydraulic detention time of 18 hours.
(4) Agriculturalty managed site. Any silo on which a crop )s produced, managed, and harvested (Crop Includes grasses, grains, trees, ate.);
(5) Air Siripping. A process by which the ammonium Ion Is first converted to d'Issolved 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 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 or to separate liquids of different densittas;
(a) Chemical Addhlon Systems- The addition of chemlcal(s) to wastewater at an application point for purposes of Improving solids removal, pH adjustment,
alkalintly control, etc.; the capaWlty to experiment with different chemicals and different application points to achieve a specific result w11I be considered one
system; the capability to add chamical(s) to dual units will be rated as one system; capability to add a chemical at a different applicat€on paints for diNarant
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Condhfoning. The addition of a chemical compound such as Ilene, ferric chloride, or a polymer to wet sludge to coalesce the mass prior to
its application to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater oonlalning Inorganic, non -toxic materials from sand, gravel,
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous 9O0 and Nitrogenous Removal by NO.Aicaflon- A single stage system requited to achieve permit effluent limits on BCD
and ammonia nitrogen within the same biological reactor,
(13) Dech'orinatlon. The partial or complete reduction of residual chlorine In a by any chemical or physical process;
(14) Denilrfficatfon Process. The conversion of nitrate -nitrogen to nitrogen gas;

(15) E€ecirodialysls. Process for removing lonl2ad salts from water through the use of ion-salective Ion -exchange membranes;
(16) Fitter Press. A process operated mechanicaUy for panialiydewatering sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergertt malorfais through
the introduction of air In the form of fine bubbles; also called foam fraciionalicn;
(18) Grft Removal. The process of removing grit and other Heavy mineral matter from wastewater;
(19) Imhoff Tank, A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower sludge digestion 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 different molecules are exchanged;
(22) Land application.
(a) Sludge Disposal. A final' sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e., chisel plow); (not applicable 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 orxo a land area as a
means of final disposal or treatment;
(23) Microscrean. A few speed, continuously back -washed, rotating drum lifter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nilriiication Process. The biochemical conversion of unoxldixed nitrogen (ammonia and organic nitrogen) to oxidized ndrogen (usuaily nitrate);
(25) Nitrogenous Stage. A separate stags 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 oxicianoxic 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 settling of finery suspended soiids;
(28) Post Aeration. Aeration following conventional secondary treatment unhs to increase effluent D.D, or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a nor1mechaniU0, gravity means of flowing down a
series of steps or weirs; The How 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 essenllat stop la meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A blophyslcal carbon process that utlilzes biological aciivity and organic absorption by, using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled Into the system;
(31) Preaeration. A lank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units. Unit operations in the ireatmenl process, such as screening and comminution, that prepare the liquor for subsequent major operations;
(33) industrial 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 the treatment process which is operated by the same governing body as the wastewater
treatment piard being rated;
b) Pre-treatment Program, Industrial - must be a State or EPA required program to receive points on the raling sheet;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing sehloable and suspended
solids and BOO which Is associated with the solids;
(35) Pumps. All influent, effluent and in -plant pumps;
(36) Radlation. Disinfection or sterilization process utilizing devices amitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process In which a heavy contaminated liquid is Pressurized through a membrane forming nearly pure i;quid free from
suspended sollds;
(38) Rotating Biological Contractors. A fixed biological' growth process in which wastewater Cows through tanks in which a series of partialiy submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons, or soma other treatment process In which lufiher biodecomposhlon I. -
expected to produce desired effluents; Hydraulic loading rates on these fifters are computed In gpolac and have a resulting low gprrvsf (less than ono);
b) Recirculating biological - the same type of sand fitter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filter;
(40) Sand or Mixed -Media Fitters. A polishing process by which effluent fimffs are achieved through a further reduction of suspended solids;
(a) low rate gravity, hydraulically loaded filter with loading rates In the one tc three gpmisl range;
(b) high rate -- a pressure, hydraulically loaded fitter wish loading rates In the live gpmisf range; Al any rate, the loading rate will exceed three gprrVsi;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment Plant and which has the purpose of removing sludges assccialad 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 lt
to the contact basin;
(43) Septic Tank A singia-story settling tank in which settled sludge is In contact with the wastewater flawing through the lank; shall not be applicable for
septic tank systems serving single family residences having capacity of 2,000 gallons or less which discharge to a nitrification field;
(44) Stu:=t7e Digestion. The process by which organic or volatile matter and sludge is gasified, liquefied, mineralized or convoriod into more stable organic matter
through the activity of living organisms, which fncludas aerated holding tanks;
(n5) 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 constituetds are removed by successive washings with fresh water or plant effluent;
{47) Sludge Gas Utilizat on. The process of using sewage gas for the purpose of heating buildings, driving anginas, etc.;
(4e) Sludge bolding Tank {Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not conlalning a digester In whlch 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 necessarity an amount that would be required to achieve stabilization of organic matter. A nonaeraled 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 iumace designed to bum sludge and to remove all moisture and combustible materials and reduce lice sludge to a sterile ash;
(5G) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrascble, and to reduce the pathogenic organism
content; This may be done by pH adjustment, chlorine dosing, or by heal treatment;
(51) Sludge Thickener. A type of sedimentatlon tank in which the sludge is permitted to settle and thicken through agitallon and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter is effected by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, including non -biodegradable particulate (floatablo solids, suspended sends and BCD
reduction) from municipal and Industrial wastewater treatment systems;
(55) Tertiary Treatment. A slago of treatment following secondary which Is primarily for the purpose of effluent polishing; A settling Lagoon or sand or coal filter
might be employed for this purposo;
(56) Thermal Pollufl'on Control Dovlco. A dov;ce providing for the transfer of heal 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 Conoitioner. A conditioning process by which heal Is added for a protracted period of time to Improve the dewaterablllty of sludge by the
solubilizing and hydrauliaing of the smaller and mora highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes, Including disease -causing agents which after discharge and upon exposure, ingestion, Inhaiatlon
or assimilation into any organism, either dlrectly from the environment or indirectly by Ingestion through lood chalne, will cause death, disease, behavioral }.
abnormaHlios, cancer, genetic mutaflons, physiologloal malfunctions (including maitunct'tons in reproduction) or physical defomitlons, in such organisms or their
offspring; Toxic materl4;s Include, by way of Illustration and not Iimhalldn_ lead, cadmium, chromium, mercury, vanadium, arserk. zinc, orlho-nitro-chicrobenzene
(ONCB), polychlorinated biphanyls (PCBs) and dlchlerodiphenyl iricHoroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(53) Trickl::tg Fiifer. A biological treatrr�nl unit consisting of a material such as broken stone or rock over which wastewater is distributed; A high rate trickling
f.;ter Is one which operated al between 10 and 30 mgd per acre. A low rate trickling litter is one which is designed to operate at one to four mgd per acre;
(K) Tdekl'tg 'Alter (Packed Tcxor). A plu I flow type of operatI 1 In which w slewalar flow.:: Town through succesrlve layers U media or filtrate malarial; 01.anlc
materl%l Is removed ccr;' ,;sty ty the votive blologlca; fixed growth In each successlvo layer. This method may produce 'secondary quality efituent, or may be
adaYled to produce a r: `tied effluent;
(61) Vacuum Filter, Ger',r uy.s, cr F" Pressa::. Davic-)s wWh are desig:,ad to remove excess water from either digested or undlgesled sludge prior to dispczl
or further treatment.