WQ0000581_Final Permit_19940106

State of North Carolina
DepcTinent of Environment,
Health and Natural Resources « s
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary C) C H
A. Preston Howard, Jr., P.E., Director
January 6, 1994
John W. Crawford, Vice President Operations
Eagle Snacks, Inc.
8115 Preston Road, Suite 300
Dallas, Texas 75225
Subject: Permit No. WQ0000581
Eagle Snacks, Inc.
ESI Robersonville Facility
Wastewater Spray Irrigation
Martin County
Dear Mr. Crawford:
In accordance with your application received September 30, 1993, we are forwarding herewith
Permit No. WQ0000581, dated January 6, 1994, to Eagle Snacks, Inc. for the continued operation of the
subject wastewater treatment and spray irrigation facilities. Please be advised that a review of the
groundwater monitoring data over the past two years has disclosed occasional exceedances of total
dissolved solids (IDS), sulfate, and nitrate at all three application sites. Therefore, the Division can not
approve your request to change Condition No. 17 from maximum weekly application rates for each site to
maximum annual average application rates for each site. Changing Condition No. 17 would allow very
high short-term loadings which could result in further exceedances in the groundwater.
This permit shall be effective from the date of issuance until December 31, 1998, shall void Permit
No. WQ0000581 issued June 13, 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 the
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.
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

If you need additional information concerning this matter, please contact Mr. John A. Kuske III at
[phone].
Sincerely,
a , kQ.4YY, C�
A. Prest Howard, Jr., P.E.
cc: Martin County Health Department
Washington Regional Office, Water Quality
Washington Regional Office, Groundwater
CToundwater Section, Jack Floyd
Training and Certification Unit
Facilities Assessment Unit

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SPRAY IRRIGATION SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Eagle Snacks, Inc.
Martin County
FOR THE
continued operation of a spray irrigation facility capable of treating and disposing of a combined 144,000
GPD consisting of a 50 GPM duplex pump station, a rotary screen, an 80 GPM transfer pump station with
dual pumps, a 1.1 million gallon aerated storage tank, a 1.6 million gallon non-aerated storage tank, and
all associated sprinklers, piping, valves and appurtenances, approximately thirty-six (36) acres of spray
irrigation fields which will be able to treat 62,838 GPD of the combined wastewater year round,
approximately nine (9) acres of spray irrigation fields which will be able to treat 38,000 GPD of the
combined wastewater year round, and approximately thirteen (13) acres of spray irrigation fields which
will be able to treat 43,162 GPD of the combined wastewater during the months of May through October
to serve Eagle Snacks, Inc. Robersonville Facility with no discharge of wastes to the surface waters,
pursuant to the application received September 30, 1993, 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 December 31, 1998, shall void Permit
No. WQ0000581 issued June 13, 1989, and shall be subject to the following specified conditions and
limitations:
1. The spray irrigation facilities shall be effectively maintained and operated at all times so that
there is no discharge to the surface waters, nor any contamination of ground waters which
will render them unsatisfactory for normal use. In the event that the fadilities fail to
perform satisfactorily, including the creation of nuisance conditions or failure of the
irrigation area to adequately assimilate the wastewater, the Permittee shall take immediate
corrective actions including those actions that may be required by the Division of
Environmental Management, such as the construction of additional or replacement
wastewater treatment and disposal facilities. ,
2. 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.

3. 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.
4. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited-
5.
rohibited.5. The following buffers shall be maintained:
a) 400 feet between wetted area and any residence or places of public assembly under
separate ownership,
b) 150 feet between wetted area and property lines,
c) 100 feet between wetted area and wells,
d) 100 feet between wetted area and drainageways or surface water bodies,
e) 50 feet between wetted area and public right of ways,
f) 100 feet between wastewater treatment units and wells, and
g) 50 feet between wastewater treatment units and property lines.
Some of the buffers specified above may not have been included in previous permits for
this waste treatment and disposal system. These buffers are not intended to prohibit or
prevent modifications, which are required by the Division, to improve performance of the
existing treatment facility. These buffers do, however, apply to modifications of the
treatment and disposal facilities which are for the purpose of increasing the flow that is
tributary to the facility. These buffers do apply to any expansion or modification of the
spray irrigation areas and apply in instances in which the sale of property would cause any
of the buffers now complied with, for the treatment and disposal facilities, to be violated.
The applicant is advised that any modifications to the existing facilities willrequire a permit
modification.
�' is �► :►1 u: I► WE MINFIBUT111,131315121
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of
the wastewater treatment facilities. The operator must hold a certificate of the type and
grade at least equivalent to or greater than the classification assigned to the wastewater
treatment facilities by the Certification Commission. The Permittee must also employ a
certified back-up operator of the appropriate type and grade to comply with the conditions
of Title 15A, Chapter 8A, .0202. The ORC of the facility must visit each Class I facility at
least weekly and each Class 11,171, and lV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A,.0202.
3. A suitable year round vegetative cover shall be maintained.
4. Irrigation shall not be performed during inclement weather or when the ground is in a
condition that will cause runoff.
5. Adequate measures shall be taken to prevent wastewater runoff from the spray field.
6. The facilities shall be effectively maintained and operated as a non -discharge system to
prevent the discharge of any wastewater resulting from the operation of this facility.
PI

7. The application rates shall not exceed the following:
Site A lic n R t s in h w k Application Penal
9 Acres 1.1 Year round
36 Acres 0.45 November thru April
0.48 May thru October
13 Acres 0.48 May thru October
8. No type of wastewater other than that from Eagle Snacks, Inc. Robersonville Facility shall
be sprayed onto the irrigation area.
9. No traffic or equipment shall be allowed on the disposal area except while installation
occurs or while normal maintenance is being performed.
10. Public access to the land application sites shall be controlled during active site use. Such
controls may include the posting of signs showing the activities being conducted at each
site.
1. Any monitoring (including groundwater, surface water, soil or plant tissue analyses)
deemed necessary by the Division of Environmental Management to insure surface and
ground water protection will be established and an acceptable sampling reporting schedule
shall be followed.
2.
Adequate records shall be maintained by the Permittee tracking the amount of wastewater
disposed. These records shall include, but are not necessarily limited to, the following
information:
a) date of irrigation,
b) volume of wastewater irrigated,
c) field irrigated,
d) length of time field is irrigated,
e) continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for each
field,
f) weather conditions, and
g) maintenance of cover crops.
The effluent from the subject facilities shall be monitored by the Permittee at the point prior
to irrigation every March, June, September and December for the following parameters:
BODS pH
TSS Sodium
NH3 as N Calcium �+
Magnesium
Sodium Adsorption Ratio by Calculation
3

4. Three copies of all operation and disposal records (as specifies in condition 111 2), and all
effluent monitoring data (as specified in condition In 3) and any other data as may be
required shall be submitted on or before the last day of the following month to the
following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
5. Noncompliance Notification:
The Permittee shall report by telephone to the Washington Regional Office, telephone
number 919/946-6481, as soon as possible, but in no case more than 24 hours or on the
next working day following the occurrence or first knowledge of the occurrence of any of
the following:
a. Any occurrence at the wastewater treatment facility which results in the treatment of
significant amounts of wastes which are abnormal in quantity or characteristic, such as
the dumping of the contents of a sludge digester, the known passage of a slug of
hazardous substance through the facility, or any other unusual circumstances;
b. Any process unit failure, due to known or unknown reasons, that renders the facility
incapable of adequate wastewater treatment, such as mechanical or electrical failures of
pumps, aerators, compressors, etc.;
e. 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 has gone out of
compliance with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in letter
form within 15 days following first knowledge of the occurrence. This report must outline
the actions taken or proposed to be taken to ensure that the problem does not recur.
'1 ►1'i: _0j t .914:111111 a01131_Q
The six existing monitoring wells 9-1, 9-2, 24-1, 25-1, 25-2, and 25-3 (see attached map)
shall be sampled every March, June, September, and December for the following
parameters:
NO3 Ammonia Nitrogen
TDS TOC
pH Water Level
Chloride
Sulfate
Volatile Organic Compounds - (In November only by Method 1 or Method 2
below)
Method 1: Method 6230D (Capillary . Column), "Standard Methods For The
Examination of Water and Wastewater", 17th ed., 1989
Method 2: Method 502.2 "Methods For The Determination Of Organic Compounds
In Drinking Water", U.S. EPA- 600/4-88/039
4

,2. The measurement of water level must be made prior to sampling for the remaining
parameters. The depth of water in each well shall be measured from the surveyed point on
the top of the casing.
3. The measuring points (top of well casing) of all monitoring wells shall be surveyed to
provide relative elevations of the measuring point for each monitoring well.
4. If TOC concentrations greater than 10 mg/l are detected in any downgradient monitoring
well, additional sampling and analysis must be conducted to identify the individual
constituents comprising this TOC concentration. If the TOC concentration, as measured in
the hack and monitor well, exceeds 10 mg/l, this concentration will be taken to represent
the naturally occurring TOC concentration. Any exceedances of this naturally occurring
TOC concentration in the downgradient wells shall be subject to the additional sampling
and analysis as described above.
5. If any volatile organic compounds are detected by method 6230D, or the equivalent method
502.2, then EPA methods 604 and 611 must also be run to detect other organic compounds
which may be present. The results of all analyses specified in the monitoring requirements,
including 604 and 611 if required, must be submitted simultaneously.
6. The results of the sampling and analysis shall be sent to the N.C. Division of
Environmental Management P.O. Box 29535 Raleigh, NC 27626-0535 on Form GW -59
(Compliance Monitoring Report Form) every April, July, October, and January.
7. The COMPLIALTCE BOUNDARY for the disposal system is specified by regulations in
15A NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary is
established at either (1) 250 feet from the waste disposal area, or (2) 50 feet within the
property boundary, whichever is closet 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).
Also in accordance with 15A NCAC 2L, a REVIEW BOJJNDARY 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.
8. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall
be provided.
9. It is the responsibility of the Washington Regional Office to enforce all applicable
groundwater regulations and to insure appropriate notification to the permittee when
exceedances or violations are observed.
1. Adequate inspection, maintenance, and cleaning shall be provided by thePermittee to
insure proper operation of the subject facilities.
2. The Permittee or his designee shall inspect the wastewater treatment and disposal facilities
to prevent malfunctions and deterioration, operator errors and discharges which may cause
or lead to the release of wastes to the environment, a threat to human health, or a nuisance.
The Permittee shall keep an inspection log or summary including at least the date and time
of inspection, observations made, and any maintenance, repairs, or corrective actions taken
by the Permittee. This log of inspections shall be maintained by the Permittee for a period
of three years from the date of the inspection and shall be made available upon request to
the Division of Environmental Management or other permitting authority.

3. Any duly authorized officer, employee, or representative of the Division of Environmental-
Management may, upon presentation of credentials, enter and inspect any property,
premises or place on or related to the disposal site or facility 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.
MOM► .: !►} 0►
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. This permit is not transferable. In the event there is a desire for the facilities to change
ownership, or there is a name change of the Permittee, a formal permit request must be
submitted to the Division of Environmental Management accompanied by an application
fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may
not be approved.
4. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Environmental Management in
accordance with North Carolina General Statute 143-215.6(a) to 143-215.6(c).
5. The issuance of this permit does not preclude the Permittee from complying with any and
all statutes, rales, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction:
6. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of the project.
7. The annual administering and compliance fee must be paid by the Permittee within thirty
(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)•
8. The Permittee, at least six (6) months prior to the expiration of this permit, shall request its
extension. Upon receipt of the request, the Commission will review the adequacy of the
facilities described therein, and if warranted, will extend the permit for such period of time
and under such conditions and limitations as it may deem appropriate.
9. The subject wastewater treatment and disposal facilities shall be connected to an operational
publicly owned wastewater collection system within 180 days of its availability to the
subject facilities, if the subject wastewater treatment or disposal facilities are in
noncompliance with the terms and conditions of this non -discharge permit or the governing
statutes or regulations. Prior to the initiation of these connection activities, appropriate
approval must be received from this Division.
�' 6

Permit issued this the 6th day of January, 1994
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Preston Howard, Jr., P.E., Director
Division of tnvimnmenrai Management
By Authority of the Environmental Management Commission
Permit Number WQ0000581

L 0 C- A fi'G in 5
Eagle Snacks, Inc.
Spray Irrigation
Martin County
WQ0000581/GW93194
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-er Martin County
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4\� FIGURE — SITE LOCATION
ROBERSONVI-L E LAND AP.
SCALE ; 1'*=1290'
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of Plant:_
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Owner
Dr Contact Person:
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Mailing
Address: 7115
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County:_fPLr-ft;. Telephone: P- VO--> a- 7"
NPDES Permit No. NG00 Nondi$c. Per. No.106C22Q2 r
lssueDate: 61! 3 % 3'9 Expiration Date:_ 32
Existing Facility X New Facility
Rated By: -L. f7le<«5 Date: ✓ 5 91-3,
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC 6K Grade A='
Plant Class: (circle one) ]I I III IV Total Points
ITEM POINTS (5) SECONDARY TREATMENT -UNITS
(a)
Carbonaceous Stage
(1 ) Industrial Pretreatment Units and/or
(i)Aeration - High Purity Oxygen System
Industrial Pretreatment Program
.... .
Diffused Air Syslem
(see definition No. 33) 4
(2) DE,�IQ FLOW OF PLANT IN GPD
....... ,
Mechanical Air System (fixed,
(not applicable to non -contaminated cooling waters, sludge
floating or rotor -
Separate Sludge Reaeration
handling faciiiiies for wafer purification plants, totally
. ...
(ii) Trickling Filter
closed cycle systems (def. No. 11), and facilities
High Rate
consistingonly of Item 4 d or Items 4 { ) (d)}
y (} () () {d) and 1 t
.......... , -
Standard Rate
0 — 20,000 .......................... 1
20,001 - 50,000 .......................... 2
_
Packed Tower .........................
{iii) Biological Aerated Filler or Aerated
50,001 — 100,000 .......................... 3
100,001 250,000 .......................... ®
Biological Filter . ...................
(iv) Aerated Lagoons
250,001 -- 500,000 .......................... 5
. .................... .
500,001 --1,000,000 ................ . ......... 8
(v) Rotating Biological Contactors . .. .. .
1,000,001 •2,00a,o00 .................. 10
2,000,001 (and up) - rate 1 point additional for each
(vi) Sand Filters -
200,000 gpd capacity up to a
inlermitlenl biological ....
maximum of 30
Design Flow (gpd) !3 D Q*•ao
,
recirculating biological . , .. .
(vi:) Stabilization Lagoons
(3) PRELIMINARY UNITS (see definition no. 32)
. _ . . -
� � � .........................
(viii)Clarifier
(a} Bar Screens ................................
...
_
(ix) Single stage system for combined��
or
(b) Mechanical Screens, Static Screens or
carbonaceous removal of BOD and
nitrogenous by
Comminuting Devices ........................ 2
removal nitrification
(see del. No. 12) (Points for this item
(c) Grit Removal ............................... !
have to be in addition to items (5) (a)
or
(d) Mechanical or Aerated Gril Removal ........... 2
() through (5) (a) {vii:} , , , .. ,
' ' ' " '
(x} Nutrient additions to enhance BOD
(e) Flow Measuring Device ..................... ©
removal .......
.............................
of
(f} Instrumented Flow Measurement 2
(xi) Biological Culture ('Super Bugs`) addition
..............
(g) Preaeration................................ 2 (b)
to enhance organic compound removal .... .
Nitrooenous Stage k
(h) Influent Flow-Equalixalion ...................
(i) Aeration - High Purity Oxygen System .... .
(,) Grease or Oil Separators - Gravity .......... 2
0iffused Air System ...........
Mechanical Air System (fixed,
Mechanical, 3
Dissolved Air Flotation. 6
floating, or rotor) , _
a Prechlorination .............................. 5
Separate Sludge Reaeration . .
(ii) Trickling
Filler -
(4) PRIMARY TREATMENT UNITS
High Rate .Standard Rate
(a) Septic Tank (see definition no. 43) ............... 2
.
Packed Tower..
(b) ImbofiTank... .. ............................... 5
_.
(iii) Biological Aerated Fit ter or Aerated
(c) Primary Clarifiers ............................. 5
Biological Filter
(d) Settling Ponds or Settling Tanks for Inorganic
, . , . , .
, ,{iv) Rotating Biological Conlaclor
......
g
Non-toxic Materials {sludge handling facilities
. . ..... .
(v Sand '
for seater purification pin n.'s, sand, gravel,Filt
-
intermittent biological
stone, and other mining oper.;iion:, a cepl
recreational activities such as gem or gold
........
recirculating biological
mining) ...................................... 2
(vi) Clarifier................................

DFFINITIDNfi
(1)Acuvaled Carbon Beds. A physicaltchemicat method for reducing soluble Organic material from waslewaler
efflueni; the cotumn-type beds used in this method wits have a glow tale varying frofn two to eight gallons per
minute per square loot and may be either upriow or, downtiow carbon bads. Carbon may or may not be
regenataSrd on the wastewater treatment plant site.
(2)Aeraled Lagoons. A basin in which all solids are maintained irr suspension and by which biological oxidation or
organic mailer is reduced through artificially accelerated translei of oxygen on at flow-through basis;
(3)Aeralion. A process of bringing about intimals contact between air or high purity oxygen in a liquid by
spraying, agitation ditfusion;
(4)Agricu€turally managed site. Any site on which a crop is produced, managed, and harvested (Crop includes
grasses, grains. trees, etc);
(5)Air Stripping- A process by which the ammonium ion is first converted to dissolved ammonia (pH adjustment)
Willi the ammonia then released to the atmosphere by physical means; or other similar processes which remove
petroleum products such as benzene, toluene, and xylene.
(6)Garbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high
temperalums which volad'iize and oxidize the absorbed impurities;
(7)Carbonaceous Stage. A stage of waslewaler treatment designed to achieve 'secondary' effluent limits.
(S)Cenlrifuge. A mechanical device in which centrifugal force is used to separate solids from liquids andfor to
separate liquids of different densities;
(9)Chemical Addition Systems - The addition of chemical (s) to wastewater at an application point for purposes o1
improving solids removal, pH adjustment, alkalinity control, etc.; the capability to experiment with diltrsrent
chemicals and different application points to achieve a specific result wifl be considered one system; the
tapability to add chemical (s) to dual units will be rated as one system; capability to add a chemical at difference
application points for different purposes will result in the systems toeing rale as separate system.
(10)Chemical Sludge Conditioning. The addition of a chemical compound such as cisme, fertic chloride, or a
polymer to wet sludge to coalesce the mass prior to its application to a dewalering device;
(1l)ClosedCycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing
inorganic, non-toxic materials from sand, gravel, crushed stone or other similar operations, from which there is
no discharge to the surface waters; such systems shall carry a maximum of two points regardless of pumping
facilities or any other appurtenances;
(12)Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrificalion - A single stage system
'designed' to achieve 'advanced' permit effluent limits on BOD and ammonia nitrogen within the same biological
reactor.
(13)De-chlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical
process;
(14)Denilri icalion Process. The conversion of nilraie-n€trogen to nitrogen gas;
(15)Elecirodialysis, Process for removing ionized salts from water through the use of ion -selective fon-
exchange membranes;
(1S)Filler Press. A process operated mechanically for partially dewatering sludge;
(17)Foam Separaiion. The planned frothing of wastewater or wastewater effluent as a means of removing
excessive amounts of del ergent"materials through the introduction of air in the form of fine bubbles; also called
foam ftaclional'ron;
(18)Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19)lmhoff Tank. A deep two story waslewater lank consisting of an upper sedimeniatien chamber and a lower
sludge digestion chamber,
(20)1nstrumenled Flow Measurement. A device which indicates and/or records rate of flow;
(21)lon Exchange, A chemical process in which ions from two different molecules are exchanged;
(221Land appfcation: (a) Sludge Disposal. A final sludge disposal method by which sludge may be applied to farad
either by spraying on the surface or by subsurface injection (Le., chisel plow): (not
appdcaote for types of sludge described in (11) ofthisRu)e); (b)Treated Effluent The process of spraying
Irealed wastewater onto a land area or other methods of applicalion of wastewater onto a land area as a means
of final disposal and/or treatment;
(23)Microscreen. A low speed, continuously back -washed, rotating drum filter operating under gravity'
conditions as a polishing method removing suspended solids from effluent;
(24)Nilriliicalion Process. The biochemical conve+sion of unoxidized nitrogen (ammonia and organic nitrogen) to
oxidized nitrogen (usually nitrale);
(25)Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of
converting ammonia nitrogen to nffrale nitrogen;
(26)Phosphale Removal Biological, The removal of phosphorus from wastewater by an oxiiclanoxic process
designed to enhance luxury uptake of phosphorus by the microorganisms;
(27)Pofishing Pond. A holding pond following secondary treatment with sulfscient detention to allow for the:
settling of finely suspended solids;
(28)Post Aeration. Aeration following conventional secondary lrealment units to increase effluent DA, or for
any other purpose;
(29)Post Aeration, (Cascade) A polishing method by which dissolved oxygen is added to the eTfluehl by a
nonmechanical, gravity means of slowing down a series of steps or weirs; The flow occurring across the steps'or
weirs moves in a fairly thin layer -and the operation of the caseado requires no oporalor adjustment, thus, zero
points are assigned even though this is an essential slop 10 meeting the limits of the discharge permit;
(30)Powdered or Granular Activated Carbon Feed, 'A bi9physical carbon process that utilizes biological activity
and organic absorplion by using powdered or granular aclivaled carbon; Virgin and/or regsneraled 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 treatment process, such as screening and comminution, that
prepare the liquor for subsequent major operallons;
(33)Indvstrial Pretreatment: (a)Pre-trealmenl Unit, Industrial, Theebnoiitonin�e of a waste at its source before
discharge, to remove or to neutralize substances injurious to sewers and lraatmenl processes or to oflecl a
partial reduction in load on a treatment process -which is operaled by the same governing body as the wastewater
treatmeni plant being rated; (b)Pre-treatment Program, lndustrial - must be a State or EPA required program to
receive points on the rating sheet;