WQ0002443_Final Permit_19940805

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
August 5, 1994
Mr. William A. Hedrick, Area Manager
Hedrick Industries
6941 Quarry Lane
Stanley, NC 28164
r� T
QEH N R.
Subject: Permit No. WQ0002443
Hedrick Industries
Lake Norman Quarry
Wastewater Recycle System
Lincoln County
Dear Mr. Hedrick:
In accordance with your renewal request received May 31, 1994, we are forwarding herewith
Permit No. WQ0002443, dated August 5, 1994, to Hedrick Industries for the continued operation of the
subject wastewater recycle system.
This permit shall be effective from the date of issuance until July 31, 1999, shall void Permit No.
WQ0002443 issued November 27, 1989, 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. Ray Cox at (919)
733-5083.
Sincerely,
A. Prest Howard, Jr., P.E.
cc: Lincoln County Health Department
Mooresville Regional Office, Water Quality
Mooresville Regional Office, Groundwater
Brian Wootton, Groundwater Section, Central Office
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
Hedrick Industries
Lincoln County
FOR THE
continued operation of a wash water recycle system consisting of a 450 GPM fresh water supply pump, a
450 GPM crushed rock washer pump, a 75 GPM dust control water pump and six (6) settling basins to
serve Hedrick Industries -Lake Norman Quarry, with no discharge of wastes to the surface waters,
pursuant to the application received May 31, 1994, 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 July 31, 1999, shall void Permit No.
WQ0002443 issued November 27, 1989, and shall be subject to the following specified conditions and
limitations:
1. 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 Environmental Management 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 Mooresville Regional Office, telephone number 704/663-1699, 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
Environmental Management.
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 settling basins shall not be less than two feet at any time.
12. Any monitoring deemed necessary by the Division of Environmental Management to insure
surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
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
Environmental Management or other permitting authority, upon request.
15. Any duly authorized officer, employee, or representative of the Division of Environmental
Management may, upon presentation of credentials, enter and inspect any property,
premises or place on or related to the 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 Environmental Management 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.
'ra

19. The COMPLIAHCE 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 constructed 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.
20. Any groundwater quality monitoring, as deemed necessary by the Division, shall be
provided.
21. Noncompliance Notification:
The Permittee shall report by telephone to the Mooresville Regional Office, telephone
number 704/663-1699, 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 15 days following first knowledge of the occurrence. This report must outline
the actions taken or proposed to be taken to ensure that the problem does not recur.
22. 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 11, III, and IV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A, .0202.
3

23. 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 5th day of August, 1994
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Preston lard, Jr., P.F), Director
Division of E rronmental Management
ry--
By Authority of the Environmental Management Commission
Permit No. WQ0002443
12

:Lc,

f
RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
I �
Name of Facility: /�7� - -ems O�U S ��-• c�
7wner or Contact Person:
Mailing Address: (o9f// Qcr� 5f� /U.C• e�
County: . it/= ""'jcQf.� _ _ Teleph ne: ?'z7
Present Classification: (J/,4 New Facility Existing Faciiity_j,---
NPDES Per. No. NCOO Nondisc. Per. No.WQ�a 'Z 3 Health Dept.Per No.
Rated by: l9. %�f.� Telephone: _ (� 6 -/G�1� Date: 7-311
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: Grade: Telephone:
Check Classification(s): Subsurfa a Spray irrigation Land Application
Wastewater Classification. (Circle One) II III IV Total Points:
suesut3rAM CLA-FOFICATION
(check all units that apply)
t � - - - septic tanks
2. pump tanks
3_ siphon or pump -dosing systems
4. sand lifters
S. grease traprnterceptor
B. oil/water separators
7... gravfty subsurface treatment and disposal:
6. pressure subsurface treatment and disposal
SPRAY IRWC4ATi0N CLA5.S1FIC4TIO61
(check all units that apply)
1-
preliminary treatment (definition no. 32 )
2.
moons
3.
septic tanks
4_
pump tanks
5.
pumps
6-sand
filters
7
grease traptnteraeptor
8.
oil/waler separators
ti,
disinfection
10.
chemical addition for nutrient/aigae control
11.
spray Irrigation of waslewaler
In addition to the above classifications, pretreatment of wastewater In excess of these components shrill
be rates! using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to pwmh holder)
1. Land application of biasobds, residuals or contaminated soils on a designated she.
WASTEWATER TREATMENT FACtLrTY CLASSIFICATION
The fotiowing systems shall be assigned a Class I classification, unless the flow is of a t lgnftican! quantity or the technology is unusually
comptex, to require consideralion by the Commission on ■ case -by -case basis: (Check if Appropriate)
1, Oit/waler Separator Systems consisting only of physical separation, pumps and disposal;
2. Semis TanklSand Ffter Systems consisting only of septic tanks. dosing apparatus, pumps,sand fillers, disinfection
and direct discharge;
3. LBgoon Systems consisting only of preriminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and dual discharge;
4. Closed -loop Recycle Systems;
S_Groundwaler Remedialion Systems consisting only of oWwater separators, pumps, air -stripping, carbon adsorption, disinfection
and dislxsal;
6 Aquacufture operations with discharge to surlaoe waders;
7. Water Plant stodge handling and back -wash waler treatment;
S.-Seafood prpoessirrg consisting of screening and disposal,
9. Single-family discharging systems, whh the exception of Aerobic Treatment Units, will be classified tl permitted after July 1,
I M or it upon fnspedion by the Division, It Es found that the system is not being adequately operated or maintained. Such
systems w!; be nottfW of the classification or reclassification by the Commission, in writing.

The following scale is used for .rating wastewater treatment facilities: (circle appropriate points) `
ITEM POINTS
(1 ) trrdustrlal Pretreatment units or industrial Pretmatmant Program (sea definition No. 33)...................................................4
(2) DESIGN
FLOW OF PLANT IN gpd (rot applicable to non-eontarrinared cooling waters, sludge handing facilities for
water purf6rataon Plants, totally dosed cycle sy sr*oee definition No. 11L and facilities consisting only of gem
(4)(d) or
hens (4)(d) and (I1)(d))
0 - 20,000................. ............. ....................... ............................... ... ............. _......................... I ......... 1
20,001 - 50,000......................................................................................................................................2
50,001 - 100,000..................................._.......................................... ..........«.»............................1.3
IDO,001 - 250,000................... ......................................... ................. ............ ............... ... .................... A
250,001 - 500,000.................................................................................................................................6
5D0.001 - 1,000.000......................................................................................»..................................2
..
—­ .....................................................................................................................
1,000.001 - 2,000,0D0.:
2.000.D01 (and up) rate 1 point addhional for each 200.000 gpd capacity up to a maximum of
Design Flow (gpd)
(2) PRELIMINARY UNrrSIPROCESSES (ses del ration N0.32)
(a)
Bar Scroons .......... ..... _.............................................................................................................................. I
(b)
or
Mechanical Screens, Static Screens or Comminuting Devices .--..-----_----..__..-----.-------------._.--------.....2
(c)
Gri Rerroval......................... .................................. ............... ........ ._.......... ........ ......... ................... I .......... I
(d)
or
Mecd•rarrfcal or Aerated Ori Removal .......... .............. .......... ......... .............. .... ... ._......................................... 2
(e)
Flow Measuring Device ............................... ................ ................................... ...... .... ............................... I
(1)
or
Instrumented Flow Msasurement................................................... ......... «........................ ......................... 2
(g)
Preaaratlon......... ..................................... ................ ..................................................... ........................ 2
(h)
Wiuent Flow Equalization..........................................................................................................................2
(1)
Grease or Oil Separators -Gravity............._..._............................................................................ 2
Mechanical............... ...... .................................... ........... .............................. .......................................... 3
Dissolved Alf Flotation ............................ ..................................... _._................................ ......................... A
111Prechlorination
..... ............................ ........ ............ ........... ......................»......-•--•---............................._.....5
(4) PRIA kRYTREATMENTLINITSIPR CESSES
(a)
Septic Tank (sea definition No. 43)..... ............................. .............................. ................ .....................
(b)
Imhoff Tank. ................ .......... ........... _........ ...... ..................... ................ .................. ._..........5
(c)
Primary Clarillers........ .:............ »..................................................................................................................
(d)
Settling Ponds or Settling Tanks for Inorganic Norrloxic Materials (sludge handling facilities for water
Purification plans, sand, gravel, store, and other mining operations, except recmationai actfvfties such as gem,
wgold mining) ............................................»............................................................ 2 J
(5) SECONDARY
TREATMENT I.1I7SMSOCESSE5
(a)
Carbonaosous Stage
(i) Asration-High Purity Oxygen System .......... .».............. _...... .... ...........0...........20
Diffused Air System..... •.......................»..«.................................1 0
Mechanical Air System (fired, floating or Coto:} .,._.__.. .._..._..._.. ... . _..._......_...5
separateSludge Reaerstion........................... ........................................................_._._..3
(fl) Te4Uk g Filter
HighRata........... ......... .._..,................................. 7
StandardRate ........... ............. ............... ................................ ....... ... ..... .................
PackedTower.. ... ................................................................5
(lil} Bb1o¢caf Aerated Filter or Aerated Sksbglcal Mar 10
(tv) Aerated lagoons.. .............................................................................................1D
(v) Rotating Biological Contadors......................................................................................10
(VI) Sand Filters -intermittent biological ............................................... » .............. ............... 2
Recirculatingbiological ..... ............ ............. »........ ........ ........ ....... ............................. ........3
(vtl) Stabiklzalion lagoons ...... ........................ «..._..... ............. ...... ......... ................. 5
(vial) ci rliar..........................................................................................................................5
(ix) Slnpie slags system for combined rarbonsceous removal of BOO and nitrogenous removal by
Ntrtircation (sae deflnitlon No. 12HPoints for this lam have to be in addition to Itarrs
(5)(a)(I) through (5)(a)(vill),
utilizing the extended aeration process (see definition N9.3a)............................I.............2
ultftzing other than the extended aeration ._0
(1t) Nutrient adddions to enhance BOD removal. ..............................» «..........»........5
(XI) Biological Culture (super Sups•jaddltbn....._.. . «....... ......... ...... _. ..........»5
(b)
Nitrogenous Stage
(i) Aeration - High Purity Oxygen System... »....». . _...�.._...._ ..».... ..._..20
Diffused Air System...... .». .».._. .»... ...... ...._ .....7 0
Machanical Air System'(Ilxed, floating or rotor) ...... ...... ......... _.. ....,_...5
separate Sludge Reaorstion....... .......... .... ......... ..... _ »..� ... ._.... .»...... ... .... 3
(il) Tridding Fitter -High Rate .... ..... ...«....» ...................�...... .�.. .» .« ».........7
Standard Rate ............ ....-_....... » .»..........«.»............ ............
PackedTower.. .......«.....................».......................»......5
{ill) Biological Aerated Filter or Aerated Biological Filter ----....----.__._..----__..._.__...------10
(Iv) Rotating Biological Contaclons.......... .......... .............. .......... ................ »....-. ......10
(v) Sand Fitter - Interminont bk+loglral.......«... «......_.... »........ ...... ...........2
Recirculating blologlcal.... ........».»».. ..............................................................2
Clavier ..................................................».»..»..... ....._ ..» .5
(6) TERiUV3YOi(VIADVMICEI}[e-mail].S) /PF�C1<'SSES
(a)
Ac&ated Carbon Beds -
without carbon regone ration..». .« .....»...... »....» . » ... »..«»... ». » ... ........ 5
with carbon
(b)
Powdered or Granular Activated Carbon Feed-
whhoulcarbon rag one ration........».. « .»..» .. .. _ .. »..» ».......»» ....«... 5
with carbon regeneration._.- ............................ ».............«....... ».... «........ ...15
(d)
r AD«,`X15--ak.a�r, .....
(e)
Eiectradfatysfs........»«........................«........»..»«_.�...............................»....»......�.......................... 5
(1)
Foam $epanthon ..« . ............»... ». . » . »«.. ........_............................................... a
(9)
ion Exctunge._..» ......__.........»... .............. ........... «.... r «........._...................... .......... ...3
(h)
land Apptication of Treated Effluent (see de kXon No. 22b) (not applicable for &and. grave(. atone
and other stmfLar mining operations) by high rats kdNtration »....__.-__.___.... _......_..._...._..._...»....».A
(l)
i1)
Micrascreens ...... ............ .................................................................... 5
Phosphorous Removal by Blobgfcaf Processes (See dellnklon No. 2e)...........«..........................................20
(k)
Polishing Ponds - without aeration .............. _......... .......... ...... ....................... ......................... ... ...... _2
withserxtlon.. ».. » .........»«.._..... .«............................. ...... ..... 5

odiffused
or machanical........ .............. ........................ ................ ».......... ...... ....................... 2
s(m)
Reverse Osmosis.........................................,..._.....................................................................................S
(n)
Sand or Mixed -Media. Fltters low rate ........... .............................................. ....»...................................2
highrate ......................... »........................................... 5
(a)
Treatment processes for forlwal of metal of cyanide....., ................................... ...................._....................15
( p )
treatment processes for removal of toxic materials other than metal or 5
(7)
SLLIDG E
TREATi EN T
(a)
Sludge Digestion Tank Heated (anaerobic}..„..»......._..... »..»»................ ......... »....... ........ ......... ..... 10
Aerobic............. ............. ............................... «................................ ,......................................
Untreated(anaeroble)................................................................ ............................... ....._....................3
(b)
Sludge Stabilization (chemical or thermal) ......... ... ,.......... .................... ....................................................3
(c)
Sludge Drying Beds - { nrAy....................................................................................................................2
VacuumAssisted......................................................................................................................................5
(d)
Sludge Elutrlation... ... ..»............................................................................................5
(4)
Sludge Conditioner (chemical orthermal)......._...........................................................................................6
(1)
Sludge Thickener (gravity).. ._ .. ...... ................ ..........................................................5
(g)
Dissolved Air Flotation Unit (riot applicable to a unit rated as(3)(1)}............. ...... .......... ...... ......................... a
(h)
Sludge Gas Utilization (Including gas storage) ................... ..... ... ........... .,......................... ................... 2
(I)
Sludge Holding Tank Aerated....................................................................................................I..............5
Non- ae rated ................................. .. ................... .................... ............................................ -.. 2
{))
Sludge Incinerator (not including activated carbon regeneration)...............................................10
(k)
Vacuum Filler, CentrHuge, or Falter Press or other similar dawaterinq
(a)
RESIDUALS UTILIZATIOtVDiSPOSAL `xhducing incinerated ash)
(a)
Lagoons......................................... .............2
............. ...............................................................................
(b)
Land Application (surface and subsurface) (see definNion 22a)
by contracting to a land application operator or IandfiEI operator who holds tits land application permit
or landil permit. ....... ... ...... ....... ........................_...................2
....................... ....... ........ ..... ........... ..............
(c)
Dedicated Landflll(burfal) by the per hies of the wastewater treatment fatcility».....».».........„.................S
{fl}
(a}
Chlorination......».....................................................................................„.............................................5
(b)
Dechiorination...... ..... .»................... ____ ............. ....... ...... ............................................................. 5
(c)
Ozone .............. .«........................ ............................................................................................................. 5
(d)
Radiation. .... ..... ... ........ 5 ...................... ............................. ............ ......................... ...................................
(1 D)
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) (not applicable to chemical addition@ rated as hem (3)0),
(5)(a)(xi),
(6)(1), (6)(b). (7)(b). (7)(e), (9a). (9)(b) or (9)(c) 6 points each.
ust....................................................................................................................................5
„...................................................................................»...........................I...............3
.......«..............................»....................»,........,.....................,............................I......5
...............»...,............,..........,_.........,,.............................................................5
(1 1)
A�l.4CEilANECUS LkVr WFOCESSES
(a)
Holding Ponds, Hoidirg 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
for domestic wastewater.. .................................................... .. .................................... ..A
(b)
Ettluert Flow Equalization (rot applicable to storage baslro which are inherent In land application sysstsms;._2
(e)
(d)
Stage Discharge (riot applicable to storage basins Inherent in land application systems).._.__----__..._.......y5.-�
Pumps................ .................. ...... .............................. ..... ........... ...................................... ............ 4
(e)
Stand -By Power Supply.............. ...................................................... ...«.....«......«................ ............. .......3
(f)
Thermal Pollution Control Device ........ ................. ......... «....... ........................................... 3 .........
TOTAL PO4NTS..................... „... « „ .»,»................ ».............»
r � •
Ctrs f................ ......... .......................... ........ ..................................... ......... 6-25 Points
Class II.........» ........................ .............. ........ ................................ ... ... .26.60 Points
CISMIll ....... «.........................................................................„...................51.66 Points
Class N....« ...„.....«....».»..»......».....«.«..................................... t3f3-Up Points
Facilities having a rating of one through four points, Inclusive, do not require a osrtMed operator.
Facliftka having an activaled sludge process will be assigr=1 a minimum classification of Clams It.
Facllitfas having treatment processes for the removal of mwtsi or cyanide will be assigned a minimum class�tron of Class it,
Facllties having treatrnerst processes for the biological removal of phosphorus wart be assigned a minimum ciassfr=tlon of Class Ill,
1064 DERi n KWS
The following definitions shall apply throughout this Subchapter,
(1) Activated Carbon Beds. A physicaVcfemical method for reducing soluble organic matartal from wastewater effluers; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foal and may be either upflow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewwar treatment plant site;
(2) Awatad Lagoons, A basin In which an solids are maintalned In suspension aruf by which biological oxidation or organic matter Is reduced through artificially
atxelerzled barterer of oxygen on a flow -through basis;
(3) Aaratlon. A process of bringing about Intimate contact botween air or high purity oxygen In a liquid by spraying, aghation or dfffuslongU) Extended
Aeration. An activated sludge process utlitzfng a minimum hydraulic deterstbn lime of 15 tours.
(4) Agricuiluralty managed site. Any she on which a crop Is produced, managed, and harvested (Crop inefudes grasses, gralra, trees., etc.);
(5) Arc Strlppklg. A prorass by which the amrmonlum ion is first convened to dissolved ammonia (pH adjustmenf) with the arstonla then reJeasmd to the
at-orsphere by physical means; or other similar prtcesses which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneration The regeneration of exhausted carbon by the use of a furnace to pmvide extremely high termperstures which volatilise and oxidize the
absorbed Impurities;
() Carbonaceous Stags. A stage of wastewater trsatrero des4rwd to achieve hieconday etfhrsett limits;
(6) Centrifuge, A mecthankal crevice in which a-rougaf force Is used to separate solids from nqukh or to separats fiquids of d K@rw t denssY...rs;
(9) Chemical Addition Systems- The addition of chemical(s) to wastewater sl an app9catfon point for purposes d In-provtng soflos removal. pH adjustment,
alkalinhy controf, etc.; the capabitlty to experi msnt with dlffenwd tdtemicais end dMarent atppllcatlon points to achieve a specific rmvN wilt be considered one
system; the capabEpty to add chemicad(s) to dual writs win be rated as one system; capabillty to add a chemical at a different application points for dlfforart
purpasas wfl result In the sysiams being rated as separafs systems;
(10) Chemical Sludge Condtrioning. The addition of a chemical compound stxh as lints., ferric chloride, or a potymarr to wet sludge to coalesc+a the @@east prior to
its apptication to a dowwaring devks-
(11) Closed Cycia Systems. Use of holding ponds or bakfng tars for corrWnnwm of wastewater corrmIning Inorganic, non -toxic mat")% from sand, gravel,
crushed stone or other scimitar operatkxrs. Such sysdsrns shalt carry a maximum of two points regardless of pumping factthies or any other appurtenances;
(12) Combined Removal of Carbonaceous@ BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effiuert Gmlts on BOD
and ammonia nitrogen within the same biological reactor,
(13) Decihlordration. The partial or corrplete reduction of residual chlorins In a liquid by any chemical or phys€cad procm-,
(14) Denhrificatbn Procesa. The conversion of nitrate -nitrogen to nitrogen gas;