WQ0008945_Final Permit_19940628

Mate 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
June 28, 1994
Matthew E. Gilmore
Crown Central Petroleum Corporation
Post Office Box 1168
Baltimore, Maryland 21203
fflM.?F'J
1qT 00
�Aj
IDEHNR
Subject: Permit No. WQ0008945
Crown Central Petroleum Corporation
Crown Fast Fare on NC - 726
Groundwater Remediation Facilities
New Hanover County
Dear Mr. Gilmore:
In accordance with your application received January 31, 1994, we are forwarding herewith Permit
No. WQ0008945 dated June 28, 1994, to Crown Central Petroleum Corporation for the construction and
operation of the subject groundwater remediation facility.
This permit shall be effective from the date of issuance until May 31, 1999, 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.Q. Drawer
27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
One set of approved plans and specifics ' s is being forwarded to you. If you need additional
information concerning this matter, please contac919) 733-5083.
Sincerely, n
A. Prest Howard, Jr., P.E.
cc: New Hanover County Health Department
Coastal Environmental Services Co.
Wilmington Regional Office, Water Quality Section
Wilmington Regional Office, Groundwater Section
Jack Floyd, Groundwater 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
INFILTRATION GALLERY 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
Crown Central Petroleum Corporation
New Hanover County
FOR THE
construction and operation of a 5,760 GPD groundwater remediation facility consisting of two 4 gpm
recovery wells, flow meters (total of three), a sediment filter, two carbon filters (at 2001bs. each) arranged
in series and rated at 10 gpm capacity, a 300 gallon dosing tank with nutrient and hydrogen peroxide feed
systems, an alarm system which will terminate operations upon high water level conditions, a 20 foot by
50 foot gravity infiltration gallery, and all associated piping, valves, controls, pumps, sample ports and
appearances to serve Crown Central Petroleum Corporation's former Crown Fast Fare on NC-726 (now
the Something Fishy Restaurant) with no discharge of wastes to the surface waters, pursuant to the
application received January 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 May 31, 1999, and shall be subject to
the following specified conditions and limitations:
I. PERFORMANCE STANDARDS
1. Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a professional engineer certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting materials. Mail the Certification to the Water Quality
Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC 27626-0535.
2. The Wilmington Regional Office, telephone number 910/ 395-3900 shall be notified at
least forty-eight (48) hours in advance of operation of the installed facilities so that an in -
place inspection can be made. Such notification to the regional supervisor shall be made
during the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday,
excluding State Holidays.
3. This permit shall become voidable if the soils fail to adequately assimilate the wastes and
may be rescinded unless the facilities are installed, maintained, and operated in a manner
which will protect the assigned water quality standards of the surface waters and ground
waters.

4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
actions that may be required by this Division, such as the construction of additional or
replacement treatment or disposal facilities.
5. The 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.
6. Any 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.
7. Diversion or bypassing of the untreated groundwater from the treatment facilities is
prohibited.
II. OPERATION AND MAINTENANCE REQUIREMENTS
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, I1I, and IV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A, .0202. Once
the facility is classified, the Permittee must submit a letter to the Certification Commission
which designates the operator in responsible charge within thirty days after the wastewater
treatment facilities are 50% complete.
3. 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.
III. MONITORING AND REPORTING-- REQUIREMENTS
1. Any monitoring deemed necessary by the Division of Environmental Management to insure
surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
2. Noncompliance Notification:
The Permittee shall report by telephone to the Wilmington Regional Office, telephone
number 910/ 395-3900 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.;
2

IV.
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.
GROUNDWATER REQUIREMENTS
1. Oxygen and nutrients supplements, as described in the received application, may be added
to the remediation system. However, if nutrients or their byproducts are detected in the
monitoring wells or influent samples, as required by this permit, above 15A NCAC 2L
standards, then the permittee will cease addition of nutrients to the groundwater and
perform an investigation as dictated by 15A NCAC 2L .0106 (d).
2. A second recovery well shall be constructed and utilized on this site. This recovery well
shall be named RW2, located as indicated on Attachment A, and have a screened interval
form 2.5 feet to 17.5 feet below land surface.
3. Prior to beginning waste disposal operations, one downgradient, shall be installed to
monitor groundwater quality. The well(s) shall be constructed such that the water level in
the well is never above or below the screened (open) portion of the well at any time during
the year. The general location and name for each well is marked on Attachment A. Each
monitoring well shall be located at the review boundary, constructed in accordance with
this permit, and approved by the Wilmington Regional Office.
4. Monitor wells MW 1, MW2, MW4, MW5, MW6, MW7, RW 1, and RW2 shall be sampled
initially after construction and thereafter every April, August and December for the
following parameters:
Benzene Toluene Nitrate
Ethyl Benzene Xylenes MTBE
Water Levels
The measurement of water levels must be made prior to sampling for the remaining
parameters. The depth to water in each well shall be measured from the surveyed point on
the top of the casing.
The measuring points (top of well casing) of all monitoring wells shall be surveyed to
provide the relative elevation of the measuring point for each monitoring well.
The results of the sampling and analysis shall be sent to the Groundwater Section, Permits
and Compliance Unit, P.O. Box 29535 Raleigh, N.C. 27626-0535 on Form GW-59
[Compliance Monitoring Report Form] every May, September, and January.
5. The influent and effluent from the treatment system, and the water levels in the monitoring
wells ( while the system is pumping) shall be sampled once every two (2) weeks for the
first three (3) months and monthly thereafter for the parameters specified below:
Benzene Toluene Nitrate
Ethyl Benzene Xylenes MTBE
Water Levels BTEX
3

The results of the sampling and analysis shall be sent to the Groundwater Section, Permits
and Compliance Unit, P.O. Box 29535 Raleigh, N.C. 27626-0535 within 30 days of
sample collection.
6. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall
be provided.
7. All wells that are constructed for purposes of groundwater monitoring shall be constructed
in accordance with 15A NCAC 2C .0108 (Standards of Construction for Wells Other than
Water Supply) and any other state and local laws and regulations pertaining to well
construction.
8. The Wilmington Regional Office, telephone number 910/ 395-3900 shall be notified at least
forty-eight (48) hours prior to the construction of any monitoring well so that an inspection
can be made of the monitoring well location. Such notification to the regional groundwater
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.
9. Within sixty (60) days of completion of all monitoring wells, the permittee shall submit two
original copies of a scaled topographic map (scale no greater than 1 ":100') signed and
sealed by a professional engineer or a state licensed land surveyor that indicates all of the
following information:
a. the location and identity of each monitoring well,
b. the location of the waste disposal system,
c. the location of all property boundaries,
d . the relative elevation of the top of the well casing (which shall be known as the
"measuring point"), and
e. the depth of water below the measuring point at the time the measuring point is
established,
f. the latitude and longitude of the established horizontal control monument.
This survey shall be conducted using approved practices outlined in North Carolina
General Statutes Chapter 89C and the North Carolina Administrative Code Title 21,
Chapter 56. The surveyor shall establish a horizontal control monument on the property of
the waste disposal system and determine the latitude and longitude of this horizontal control
monument to a horizontal positional accuracy of +/- 10 feet. All other features listed in a.
through f. above shall be surveyed relative to this horizontal control monument. The
positional accuracy of features listed in a. through f. above shall have a ratio of precision
not to exceed an error of closure of 1 foot per 10,000 feet of perimeter of the survey. Any
features located by the radial method will be located from a minimum of two points.
Horizontal control monuments shall be installed in such a manner and made of such
materials that the monument will not be destroyed due to activities that may take place on
the property. The map shall also be surveyed using the North American Datum of 1983
coordinate system and shall indicate the datum on the map. All bearings or azimuths shall
be based on either the true or NAD 83 grid meridian. If a Global Positioning System (GPS)
is used to determine the latitude and longitude of the horizontal control monument, a GPS
receiver that has the capability to perform differential GPS shall be used and all data
collected by the GPS receiver will be differentially corrected.
The maps shall be sent to the Groundwater Section, N.C. Division of Environmental
Management P.O. Box 29535 Raleigh, N.C. 27626-0535.
0

10. Upon completion of all well construction activities, a certification must be received from a
professional engineer certifying that the monitoring wells are located and constructed in
accordance with the Well Construction Standards (15A NCAC 2C) and this permit. This
certification should be submitted with copies of the Well Completion Form (GW-1) for
each well. Mail this certification and the associated GW-1 forms to the Permits and
Compliance Unit, Groundwater Section, P.Q. Box 29535, Raleigh, NC, 27626-0535.
11. For the initial sampling of the well as specified elsewhere in the permit, the permittee shall
submit a copy of the GW-1 Form (Well Completion Form) with the Compliance
Monitoring Form (GW-59) for that well. Compliance Monitoring Forms that do not
include copies of the GW-1 form will be returned to the permittee without being processed.
Failure to submit these forms as required by this permit may result in the initiation of
enforcement activities pursuant to NC General Statutes 143-215.6.
12. All components of the groundwater recovery, treatment, and disposal system shall be
properly weather -proofed to prevent freezing and failure of the system.
13. The groundwater recovery, treatment and disposal system shall be inspected weekly. If it
is determined that the system is malfunctioning, all repairs should be made as soon as
possible and reported to the Wilmington Regional Office within 48 hours.
14. lsoconcentration (lines connecting points of equal concentration) maps in both the vertical
and horizontal directions shall be developed using the December groundwater monitoring
data for Benzene A water level contour map must also be developed on a yearly basis.
These maps shall be submitted along with all other monitoring data for that period.
15. The permittee shall retain copies of records of all monitoring information, including all
calibration and maintenance records, all original strip chart recordings for continuous
monitoring instrumentation and copies of all reports required by this permit, for a period of
at least 3 years from the date of the sample, measurement, report or application. Records
of this monitoring information shall include, but not be limited to, the following:
a. the date, exact place, and time of sampling or measurements,
b. the individual who performed the sampling or measurements,
c. the date the analyses were performed,
d. the analytical techniques or methods used, and
e. the results of any such sampling, measurements, and analyses.
16. The permittee shall report any monitoring or other information which indicates that any
contaminant may cause an endangerment to an underground source of drinking water and
any noncompliance with a permit condition of malfunction of the injection system which
may cause fluid migration outside the injection zone or area. The information shall be
provided to the Wilmington Regional Office orally within 8 hours of the occurrence and as
a written submission within five days of the occurrence. The written submission shall
contain a description of the noncompliance and its cause, the period of noncompliance,
including exact dates and times, and if the noncompliance has not been corrected, the
anticipated time it is expected to continue, and any steps taken or planned to reduce,
eliminate and prevent reoccurrence of the noncompliance.
17. 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 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).
5

In accordance with 15A NCAC 2L, a REVIEW BOJINDARY 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.
V . INSPECTIONS
1. Adequate inspection, maintenance and cleaning shall be provided by the Permittee to insure
proper operation of the subject facilities.
2. The Permittee or his designee shall inspect the groundwater recovery and treatment
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.
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.
VI. GENERAL CONDITIONS
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. A set of approved plans and specifications for the subject project must be retained by the
Penmittee for the life of this project.
5. 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).
6. 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)•
7. The issuance of this permit does not preclude the Permittee from complying with any and
all statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction.
6

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.
Permit issued this the 28th day of June, 1994
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
6 a'J'A — L f.' T f I q m- 4 N-r
A. Preston Hard, Jr., P.E., Director /
Division of E ironmental Management
By Authority of the Environmental Management Commission
Permit No. WQ0008945
7

Permit No. WQ0008945
June 28, 1994
ENGINEER'S CERTIFI_GAT10N
1, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the
project,
Project Name
Location
for the
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
of the construction such that the construction was observed to be built within substantial compliance and
intent of this permit, the approved plans and specifications, and other supporting materials.
Signature
Date
Registration No.

AN`
11

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION/ CONTROL SYSTEMS /
Name of Facility: % , I ; f� / Jt�/r� >� ' " } X
Owner or Contact Person; 67 O el
Mailing Addres _
County: NG}•li�c?✓�f_ Telephone:�_l �-
Present Classification: New Facility �� Existing Facility
NPDES Per. No. NCOO Na disc. Per. No.WQ. YY-i Health Dept.Per No.
Rated by: l n 13,_e Telephone:',�L Y,_5 Date:
Reviewed by: Health Dept. Telephone:
Regicnal Office Telephone:
Central Office Telephone:
ORC: Grade: Telephone:
Check Classifications): Subsurface Spray Irrigation Land Application
Wastewater Classification: (Circle One) 1 II Ill IV Total Points:
// —_
IN -PLANT PfIOCESSE5 AND RELATED CONTROL EQUIPMENT MICH ARE AN INTEGRAL PART OF INDUSTRIAL PRODUCTION SHALL NOT RE
CONSIDERED WAEffiNEtEFOi THE PURPOSE QE CLASSIFICATION. ALSO SEPTIC TANK SYSTBv1S CONSIS1lNG ONLY OF SEPTIC TANK
SUBSURFACE CLASSIFIC.ATICN
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand lilters
5. grease trapAnierceptor
6. oillwaler separators
7.r :7 gravity subsurface treatment and disposal:
a. pressure subsurface treatment and disposal:
SPRAY 1RR}GAT10N CLASSIFICATION
(check all units that apply)
1.
preliminary treatment (definition no. 32 j
2.
lagoons
3.
septic tanks
4-
pump tanks
5.
pumps
6.
sand filters
7.
grease trapinlerceptor
9.
oil/water separators
9.
disinfection
10.
chemical addition for nutrient/algae control
11.
spray Irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater In excess of these components shall
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)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
1. OiUwater Separator Systems consisting only of physical separation, pumps and disposal:
2. Septic Tank/Sand Filter 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. Closod-loop Recyde Systems;
5 Groundwater Remediation Systems consisting only of b�I�Mv tpr`s�p`ac�lpr3� pumps, �tr�ppi , carbon adsorption, 6M"i�
and disposJ;
6. Aquaculture operations with discharge to surface waters;
7. Water Plant sludge handiing and back -wash water treatment;
d. Seafood processing consisting of screening and disposal.
9. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified H permitted alter July 1,
1993 or 4 upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The fo€€owing scale is used for rating wastewater treatment fa6ities: (circle appropriate points)
ITEM POINTS
( 1 )
Industrial Pretreatment Unfts or Industrial Pretreatment Program (see definition No. 33)...................................................4
(2)
DESIGN FLOW OF PLANT IN gpd [not applicable to non -contaminated cooling waters, sludge handling facilities for
water purification plants, totally closed cycle systems(see definition No. 11), and facilities consisting only of hem
(4)(d) or Items (4)(d) and (i1)(d))
0 - 20,000................................................................................................................................................1
20.001 - 50,000......................................................................................................................................2
50,001 - 100,000........................................ ............... ............ :................................................................
3
100.001 - 250.000...................................................................................................................................4
250,001 500,000 ..................................................................................................................................
5
500,001 - 1,000.1300.................... :......... ........................................ :........................................................
.8
1.000.001 - 2,000.000................. ........................................... :........... ........ :......... ........... ......................
10
2.000,001 (and up) rate 1 point additional for each 200.000 gpd capacity up to a maximum of .................30
Design Flow (gpd)
(3)
PRELIMINARY
UNrrWROC ESSES (see definition No.32)
(a)
Bat Screens..............................................................................................:................................................1
or
(b)
Mechanical Screens, Static Screens or Comminuting Devices. ...................................... ...................................
2
WGrit
Removal....................................................................:.........................................................................1
or
(d }
Mechanical or Aerated Grft Removal.............................................................................................................2
(a)
Flow Measuring Devlce..............................................................................:.................................................1
or
(1)
Instrumented Flow Measurement ............................. ........ :.................................... .......................................
(9)
Preaeration.......... ......... .......... ................................................ :............................. .2 ....................................
(h)
Influent Flow Equalization..........................................................................................................................2
(i)
Grease or Oil Separators - Gravity.................................................................................................................2
Mechanical................................................................................................................................................3
DissolvedAir Flotation................................................................................................................................8
())
Prechlodriatlon.........................................................................................................................................4
(4)
PRIMARY TREATMENT UNITS/PROCESSES
(a)
Septic Tank (see definition No- 43)............................................................................................................2
(b)
Imhoff Tank...............................................................................................................................................5
(c)
Primary Cfarlflers..........................................................................................................................................5
(d)
Settling Ponds or Settling Tanks for Inorganic Nontoxic Materials (sludge handling facilities for water
purification plants, sand, gravel, stone, and other mining operations except recreational activities such as gem
or gold mining)........................................................................ .............................................................
...2
(5)
SECONDARY TREATMENT UNITS/PROCESSES
(a)
Carbonaceous Stage
(I) Aeration-Hlgh Purity Oxygen System...............................................................................20
DiffusedAir System.......................................................................................................1
0
Mechanical Air System (fixed, floating or rotor) ................. ................ :...................... .........
8
Separate Sludge Reaerailon............................................................................................3
(11) Trickling FlRer
HighRate........................................................................................................................7
StandardRate...............................................................................................................5
PackedTower.................................................................................................................5
(ifl) Biological Aerated Filter or Aerated Biological Filter ................................................. :_........
1 0
(Iv) Aerated Lagoons ............ ........... ................ ...................................................................
10
(v) Rotating Biological Contactors......................................................................................10
(vi) Sand Filters -intermittent biological ..................................................................................2
Recirculatingbiological.....................................................................................................3
(vil) Stabilization Lagoons.....................................................................................................5
(vill) curar.................. ...... ......................... .....................
.5
(Ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrification (see definition No. 12)(Points for this item have to be in addition to items
(5)(a)(1) through (5)(a)(viii),
utilizing the extended aeration process (see definition N0.3a)...........................................2
utilizing other than the extended aeration process............................................................8
(x) Nutrient additions to enhance BOO removal......................................................................5
(x1) Biological Culture ('Super Bugs')addition........................................................................5
(b)
Nitrogenous Stage
(I} Aeration - High Purity Oxygen System.............................................................................20
DiffusedAir System.......................................................................................................1
0
Mechanical Air System (fixed, floating or rotor) ................. .,...............................................
8
Separate Sludge Reasration..................................... .......................................................3
(It) Trickling Filter -High Rate...................................................................................................7
StandardRate...............................................................................................................5
PackedTower................................................................................................................5
(ill) Biological Aerated Filter or Aerated Biological Fitter .............................................................10
(iv) Rotating Biological Contactors......................................................................................10
(v) Sand Filter- Intermittent blologicat............................ :......................... .............................
2
Recirculating biological ...................................... :.... .... .................... ........... I ......... ....... ......3
(v1) Ctarifier..........................................................................................................................5
(6)
TERTIARY OR ADVANCED TRiATIV124T l NnVPROCESSES
(a)
Acttvaied Carbon Beds -
without carbon regeneration...................................................................................................5
with carbon regeneration.......................................................................................................1
5
(b)
Powdered or Granular Activated Carbon Feed.
without carbon regeneration.................................................................................................5
.Yhh carbon regeneration.....................................................................................................1
5
(c)
Air stripping.............................................................................................................................................5
(d)
Denitrhicaticn Process..............................................................................................................................10
(a)
Electrodialysls............................................................................................................................................5
(f )
Foam Separation ... ............. .......................... ............................. ................................... ...... ............. :.........
.5
(g)
Ion Exchange.............................................................................................................................................5
(h)
Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel, stone
and other similar mining operations) by high rate inliitratfon..........................................................................4
(i)
Microscreans................................................. ............................................................................................
5
(()
Phosphorous Removal by Biological Processes (See deflnhlon No. 26).........................................................20
(k)
Polishing Ponds - wlthcut aeration............................................................................................................2
withaeration.................................................................................................................5

(15) Elecirodialysls. Process for removing Ionized saps from water through the use of Ion -selective ion -exchange membranes;
(16) Fitter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation- The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air in the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting o1 an upper sedimentation chamber and a lower sludge digestion chamber.
(20) Inslrumenled Flow Measurement. A device which Indicates and records rate of flow;
(21) Ion Exchange. A chemical process in which Ions Irom two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludgo 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 onto a land area as a
means of final disposal or treatment;
(23) Microscreen. A low speed, continuously back -washed, rotating drum filter operating under gravity conditlons as a polishing method for removing
suspended sollds from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage- A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal, Biologicat. The removal of phosphorus from wastewater by an oxiclanoxic 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 finely suspended solids;
(28) Post Aeration. Aeration following conventional secondary treatment units to increase effluent D.O. or for any other purpose;
129) Post Aeration. (Cascade) A polishing method by which dissolved oxygen Is added to the eifiuent by a nonmecharical, gravity means of flowing down a
series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus, zero puints are assigned even though this is an essential step to maeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysica) carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled into the system;
(31) Preaeration- A tank consinucied to provide aeration prior to primary troatment;
(32) Preliminary Units. Unit operations in the treatment process, such as screening and comminution, that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment 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 an the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated;
b) Pre-treatment Program, industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. The first setting tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which is associated with the solids;
(35) Pumps. Ali influent, effluent and in -plant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process in which a heavy contaminated liquid hs pressurized through a membrane forming hearty pure liquid free from
suspended solids;
(38) Rotating Biological Contractors. A fixed bloogical growth process in which wastewater flows through tanks In which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Blotogical. lFi tratlon of offluard following septic tanks, lagoons, or some other treatment process In which further blodeoomposffion is
expected to produce desired effluents; Hydraulic loading rates on these fitters are computed In gpcilac and have a resuking low gprMst (less than one);
b) Recirculating biological - the same type of sand fitter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filler,
(40) Sand or Mixed-Meda Filters- A polishing process by which effluent Ill are achieved through a further reduction of suspended solids;
(a) low rate -- gravity, hydraulically loaded !lifer with loading rates In the one to three gprmisf range;
(b) high rate — a pressure, hydraulically loaded lifter with loading rates In the five gprn/sf range; At arty rate, the loading rate will exceed three gprrO;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reaeralion. A part of the contact stabilizatlon process where the activated sludge is transferred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank. A sing€o-story settling tank In which settled sludge Is In contact with the wastewater flowing through the tank; 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) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified, liquefied, mineraltzod or concerted into more stable organic matter
through the activity of living organisms, which includes aerated holding tanks;
(45) Sludge Drying Beds- An area comprising natural or artificial layers of porous materials upon which digested sewage sludge Is dried by drainage and
evaporation;
(46) Sludge Elutriation. A process of sludge conditioning In which certain constituents are removed by successive washings with fresh water or plar4 ell
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings, driving engirles, etc.;
(48) Sludge Holding Tank (Aaraled and Nonaerated). A tank utlilzod for small wastewater treatment plants not containing a digester In which sludge may be
kept fresh, and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the
sludge fresh, but not necessarily an amount that would be required to achieve MWIlzation of organic matter. A nonaerated tank would simply be used to
decant sludge prior to dawalering and would not allow long periods (severai days of detention) without resulting odor problems;
(49) Sludge incinerators. A furnace designed to burn sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescible, and to reduce the pathogenic organism
content; This may be done by pH adjustment, chlorine dosing, or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank In which the sludge Is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter is offecled by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Sland-By Power Supply, On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, inctuding nor, -biodegradable particulate (floatable solids, suspended solids and SOD
reduction) from municipal and industrial wastewater treatment systems;
(55) Tertiary Treatment. A stage of treatment following secondary which Is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal filter
might be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing in tubes to another fluid outside the tubes, or vice versa:
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of time to Improve the dewaterabi€l of sludge by the
solubilizing and hydraufizing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes. Including cilsease•causing agents which after discharge and upon exposure, Ingestion, Inhalation
or asslmllation Into any organism, either dlfectly from the environment or indirectly by ingestion through food chains, will cause death, disease, behavioral
abnormal tles, cancer, genetic mutations, physiological malfunctions (Including maitunctions in reproduction) or physical deformations, in such organisms or their
offspring; Toxic materials Include, by way of Itlustratloh and nGI limitation: lead, cadmium, chromium, mercury, vanadium, arsenic, zinc, ortho-nliro-chlorob enzene
(ONCE), polychlotlnated biphonyls (PCBs) and dichlorodiphenyl trich€oroethane (DIDT); and any other materials that have or may hereafter be Belem lned to have
toxic properties;
(69) Trickling Filter. A blologlcal treatment unit consisting of a material such as broken stone or rock over which wastewater is distributed; A high rate trickling
filter Is one which operated at between 10 and 30 mgd per acre. A low rate trickling filter Is one which is designed to operate at one to four mgd per acre;
(60) Trickling Fitter (Packed Tower). A plug flow type of operation in which wastewater flows down through successive layers of madla or filtrats material; Organic
material Is removed continually by the active bWoglcal fixed growth In each successive layer. This method may produce 'secondary' quality effluent, or may be
adapted to produce a rvtrIled effluent;
(61) Vacuum Filter, Centrifuges, w Fitter Presses. Devices which are deslgnsd to remove excess water from either digested or undlgestod sludge prior to disposal
or further treatment.

(1)
Post Aeration - cascade.......................................................................,,,..................................,...............:.0
diffusedor mechanical ............... :..... ,............... ..................................................................2
(m)
Reverse Osmosis........................................................................
{n)
Sand or Mixed -Media Filters - low rate..............................................................
..2
highrate......................................................................5
(o)
Treatment processes for removal of metal or cyanide...................................................................................1
5
(p)
treatment processes for removes! of toxic malerials other than metal or cyanide..............................................1
5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank - Heated (anaerobic)................................................................................................10
Aerobic..... .. ..............................-.............................................
5
Unhealed(anaerobic).................................................................................................................................3
(b)
Sludge Stabilization (chemical orihormal)..............................................................................I.....................5
(c)
Sludge Drying Beds - Gravity........:.............................................................................................................2
VacuumAssisted........................................................................................................:.............................5
(d)
Sludge Elutriation....................................... ................. ....... .....................................................................
.5
(a)
Sludge Condit'oner (chemical or thermal).....................................................................................................5
(f )
Sludge Thickener (gravity).........................................................................................................................5
(g)
Dissolved Air Flotation Unit [not applicable !o a unit rated as(3)(1)].............................................................8
(h)
Sludge Gas Utilization (including gas storage)..............................................................................................2
(I)
Sludge Holding Tank - Aerated....................................................................................................................5
Non-aerated..............................................................................................................................................
2
(j }
Sludge Incinerator (not Including activated carbon regeneration)................................................................1
0
(k)
Vacuum Fifter, Centrifuge, or Filter Press or other similar ciewaloring devices...................................................t0
(8)
RESIDUALS UTILIZATION/D15POSAL(indudingincineratedash)
(a)
Lagoons ............................. .:.......... ......................................
(b)
Land Application (surface and subsurface) (see definilion 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
orlandfill permit..............................................................:.........................................................................2
(c
Dedicated Landfill(burfal) by the permittea of the wastewater treatment facility...............................................5
(9 )
DISINFEION
am
(a)
Chlorination.............................................................................................................................................S
(b)
Dechlorination.................................................................:........................................................................5
(c)
Ozone ................ ................. .................................. ........:......................................................... ..............5
(d)
Radiatlon...............................................................................................................................................
5
(1 0)
CHEMICAL
ADDITION SYSTEM(S) ( seo definition No. 9) [rot applicable to chemical additions rated as hem (3)()),
(5)(a)(xi),
(6)(a), (6)(b), (7)(b), (7)(e). (9a), (9)(b) or (9)(c) 5 points each:
List
�� ............
................................................................................................I.....................5
................................................................................................................................5
(1 1)
......................................................................................................................................
MISCELLANEOUS UNrrSfPFCCESSES
5
(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............................................................................................................................d
(b)
Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems)......2
(c)
Stage Discharge (not applicaNa to storage basins Inherent In land application systems) .......................
(d)
Pumps......................................................................................................................................................3
(a)
Stand -By Power Supply ..................................... ................. ............... ..:............... ........... ..........................
3
(1)
Thermal Pollution Control Device................................................................................................................
3
TOTALPOINTS..........................................................................
ClassI .......... ........................................................ ......................................... 5-25 Points
Class11................. .......................................... .............................................. 26-50 Points
ClassIII ........................... ...................................................... ....................... 51-65 Points
classIV ........................ ..... .......................................................................... 66-Up Points
Facilities having a rating of one through four paints, Inclusive, do not require a cen)iied operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class it.
Facilites having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class il.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class W.
-------------------------------------------------------------
.OW4 0ERN ftIONS
The following dafWlons shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physfca#lchemical method for reducing soluble organic material from wastewater effluent; The column -type beds used In this
method will have a flow rate varying from two to eight gallons per minute per square loot and may be either upflow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained In suspension arsd by which bfological oxidatlon or organic matter Is reduced through arlificially
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 dfiusion;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours.
(4) Agriculturally managed site. Any she on which a crop Is produced, managed, and harvested (Crop Includes grasses, grains, trees, etc.);
(5) Air Stripping. A process by which the amnion#um Ion Is first convened to 6ssoived ammonia ;pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxfdiza the
absorbed Impurities;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent limits;
(8) Centrifuge. A mechanical device in which cantrffugal force is used to separate sands frott7 Iiqulds or to separate liquids of different densrias,
(9) Chemical Addition Systems- The addition of chemicals) to wastewater at an application point for purposes of Improving wilds removal, pH ad)usimont,
alkalinity control, etc.; the capability io experiment with different chemicals and different application points to achieve a specific result will be considered one
system; the capability to add chomical(s) to dual units will be rated as one system; capability Ic add a chemical at a different application ps;rrts for d fforont
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Condiloning. The addition of a chemical compound such as lime, ferric chloride, or a polymer to wet sludge to coalasce the mass prior to
its application to a dewatering device;
(11) Closed Cycie Systems. Use of holding ponds or holding tanks for containment of wastewater containing Inorganic, non -toxic materials from sand, gravel,
crushed stoma 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 8O0 and NYtrogenous Aemoval by Nfl,-8ication- A siVe stage system required to achieve permit effluent limits on BOD
and ammonia nitrogen within the samo biological roactor,
(13) Dechlodnatloo. Thu raarliat or complete reduction of reslduai chlorine In a liquid by any chemcal or physical process;
(14) Donitrifficallon Process. The converslon of nlrate nllroonn to nilrooen oas