WQ0004604_Final Permit_19910426

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
51.2 North Salisbury Street • Raleigh, North Carolina 27626-0535
James G. Martin, Governor
William W. Cobey, Jr., Secretary
George T. Rverett,Ph.D.
Director
April 26, 1991
Mr. Jack Stocks, President
Ogden Village Utilities, Inc.
211 North 5th Avenue
Wilmington, NC 28401
Subject: Permit No. WQ0004604
Ogden Village Utilities, Inc.
Ogden Village Treatment Plant
Subsurface Disposal System
New Hanover County
Dear Mr. Stocks:
In accordance with your application received January 9, 1991, we are forwarding herewith
Permit No. WQ0004604, dated April 26, 1991, to Ogden Village Utilities, Inc. for the continued
operation of a 25, 000 GPD wastewater treatment plant with final disposal through a low pressure
pipe subsurface wastewater disposal system.
This permit shall be effective from the date of issuance until March 31, 1996, shall hereby
void Permit No. 12218 issued September 24, 1985, 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 to you,
you have the right to request an adjudicatory hearing upon written request within 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.
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Stocks q�►�
April 26, 1991
Page Two
If you need additional information concerning this matter, please contact Mr. Lindsay L.
Mize at 91.91733-5083.
S�cerely,
1
George T. Everett
cc: New Hanover County Health Depart�e t
Wilmington Regional Office
Groundwater Section
Training and Certification Unit
James E. Stewart

NORTH CAROLINA Wa
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SUBSURFACE DISPOSAL 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
Ogden Village Utilities, Inc.
New Hanover County
FOR THE
continued operation of a 25,000 GPD subsurface wastewater disposal system consisting of a
25,000 GPD wastewater treatment system consisting of a 5,000 gallon equalization basin
equipped with dual 17.4 GPM pumps, a flow splitter box, two (2) 12,500 gallon aeration tanks,
two (2) 2,083 gallon clarifiers, a 1,870 gallon aerated sludge holding tank, two(2) 1.45 CFM
blowers, a dual cell tertiary filter with a total filter area of 17.4 ft2, a 1,300 gallon clear well, a
1,580 mudwell, and associated backwash pumps, a dual tablet chlorinator, a 521 gallon chlorine
contact chamber, a water level alarm, 5.87 acres of green area, two (2) standard LPP drainfields,
each measuring 65 feet by 220 feet, and a standby generator to serve Ogden Village Utilities -
Wendover North Subdivision - Ogden Village Shopping Center with no discharge of wastes to the
surface waters, pursuant to the application received January 9, 1991 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 March 31, 1996, and shall be
subject to the following specified conditions and limitations:
I. PERF RMAN E STANDARDS
1. 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 as may be required by this Division, such as construction of additional or
replacement wastewater treatment or 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. This permit shall become voidable if the soils fail to adequately absorb 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. Adequate measures shall be taken to divert stormwater from the disposal area and
prevent wastewater runoff from the subsurface disposal field.

5. The sludge generated from these treatment facilities must be disposed of in
accordance with General Statute 143-215.1 and in a manner approved by the North
Carolina Division of Environmental Management.
b. A usable green area shall be maintained for wastewater disposal. The green area
shall have the capability of accommodating the average daily flow of the facility
being served without exceeding the loading rates of the green area. A "green area"
as defined in 15 NCAC 2H .0404(g)(7) is an area suitable for waste disposal, either
in its natural state or which has been modified by planting a vegetative cover of
grasses or low growing shrubbery.
7. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
S. The following buffers shall be main tained(existing facilities may be exempt):
a) 100 feet between disposal area and any public or private water supply including
wells
b) 100 feet between disposal area and "SA and SB" classified surface waters
c) 50 feet between disposal area and any stream, lake, river or natural drainageway
d) 50 feet between disposal area and property lines
e) 10 feet between disposal area and surface water interceptor drains or diversions
(upslope)
f) 25 feet between disposal area and surface water interceptor drains or diversions
(downslope) and groundwater drainage systems.
II. OPERATION AND MAINTENANCE REQUIREMENTS
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 waster treatment plant operator to be in responsible charge
of the wastewater treatment facilities. The operator must hold a certificate of the
type and grade at least equivalent to the classification assigned to the wastewater
treatment facilities by the Certification Commission.
3. The application rates to the disposal field shall not exceed 09 GPD/ft2.
4. 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.
5. No traffic or equipment shall be allowed on the disposal area except while
installation occurs or while normal maintenance is being performed.
&. A suitable cover shall be maintained on the LPP field(s) and the field(s) shall be
kept mowed. The clippings shall be removed to prevent the build up of thatch.
7. The low pressure lines shall be purged monthly using potable water or air pressure
and the pressure adjusted on the distribution lines to approved specifications.
8. The screenings removed from the wastewater treatment plant shall be properly
disposed of in a sanitary landfill.
2

9. An automatically activated standby powo*Wpply shall be on site and operational at
all times. If a generator is employed as the alternate power supply, it shall be tested
weekly by interrupting the primary power source. This testing shall be recorded in
the ORC's Daily Log which will be available for inspection upon request_
10. The chlorine tablets used in the chlorination unit shall be of the kind and type as
specified in the plans and specifications approved by the Division.
11. The flow measurement device shall be calibrated annually by a representative of a
firm which is routinely engaged in the calibration of flow measurement devices.
Records of the calibration, including all information pertinent to the calibration,
shall be available during any inspection by Division staff.
12. Diffusers shall be cleaned as needed to assure adequate aeration. Records of
maintenance shall be maintained by the permittee.
13. The flow measurement device shall be calibrated annually by a person(s) that
routinely engage in the calibration of flow measurement devices. Records of the
calibration, including all information pertinent to the calibration, shall be available
during any inspection by Division staff.
III. MQNITORING 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. Adequate records showing all maintenance shall be maintained by the Permittee.
These records should include but are not limited to the following:
Items Inspection Frequency
a) Individual dosing pump operation Weekly
b) Individual field rotation Weekly
c) High water alarms Weekly
d) Residual pressure on highest and
lowest lateral on each subfield Monthly
e) Residual pressure on all laterals Semi-annually
3. As an indicator of proper operation and maintenance, the facility shall produce an
effluent in compliance with the following limitations:
Parameter Monthly A� veragea Daily Maximumb
Flow MGD
BODS 10 mg/1 15 mg/l
NH3 as N 4 mg/l b mg/l
TSS 20 mg/l 30 mg/l
a Monthly average shall be the arithmetic mean of all samples collected during the
reporting period.
b Daily maximum shall be the maximum value of all samples collected during the
reporting period.
The effluent from the subject facilities shall be monitored by the Permittee at the
point prior to discharge to the subsurface disposal field for the following
parameters:
3

Parameter
BODS, 5 -day, 20C
NH3 as N
TSS
Total Coliform
Flow
Settleable Matter
Residual Chlorine
NO3
TDS
TOC
Chloride
Location of
Measurement
Sample
Sampling Points
Frequency
Type
Effluent
*2/Month
Composite
Effluent
*2/Month
Composite
Effluent
*2/Month
Composite
Effluent
*2/Month
Grab
Influent or Effluent
Continuous
Recording
Effluent
Daily
Grab
Effluent
Daily
Grab
Effluent
**Triannually
Grab
Effluent
"Triannually
Grab
Effluent
"Triannually
Grab
Effluent
"Triannually
Grab
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0
standard units.
* 2/Month sampling frequency only during the months of April through October.
During the remainder of the year, these parameters shall be monitored monthly.
** Triannual sampling frequency shall correspond with triannual monitoring of
wells required by Groundwater monitoring conditions.
If Groundwater sampling indicates or predicts problems with the compliance with
Groundwater Standards, this permit will be modified to include additional and/or
more restrictive limitations.
4. Three copies of all operation and maintenance records (as specified in condition III
2) and all effluent monitoring data (as specified in condition III 3) shall be
submitted on or before the last day of the following month to the following address:
NC Division of Environmental Mana¢ement
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
5. A record shall be maintained of all residuals removed from this facility. This record
shall include the name of the hauler, permit authorizing the disposal or a letter from
a municipality agreeing to accept the residuals, date the residuals were hauled, and
volume of residuals removed.
6. A maintenance log shall be maintained at this facility including but not limited to the
following items:
a. Daily sampling results including residual chlorine, settleable matter, and
dissolved oxvaen in the aeration basin and at the clarifier weir.
b. Visual observations of the plant and plant site.
c. Record of preventative maintenance (changing of filters, adjusting belt tensions,
alarm testing,diffuser inspections and cleanings, etc.).
d. Date LPP lines were purged and pressures equalized.
e. Date of calibration of flow measurement device.
Cl

f. Date and results of pow interruption testing on alternate power supply.
7. Noncompliance Notification:
The Permittee shall report by telephone to the Wilmington Regional Office,
telephone no. 919/395-3900, 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 render 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 of all or any portion of the influent to such station or facility.
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.
IV. GROUNDWATER REQUIREMENTS
1. The two (2) existing monitoring wells shall continue to be sampled every March,
July, and November for the following parameters:
NO3 (10-0) Ammonia Nitrogen
TDS (500.0) TOC
pH (6.5 - 8.5 Standard Units) Water Level
Chloride (250.0) Total Coliforms (1/100m1)
Total Suspended Solids
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.
The measurement of water level must be. made prior to sampling for the remaining
parameters.
The measuring points (top of well casing) of all monitoring wells shall be surveyed
to provide relative elevations of the measuring point for each of the monitoring
wells. The depth of water in each well shall be measured from the surveyed point on
the top of the casing.
6"

The numbers in parentheses represent the maximum allowable concentrations is 0a,
rg oundwater for the various analytical parameters, as specified in 15 NCAC 2L
[Groundwater Classifications and Standards]. Unless otherwise specified, the units
for these concentrations are expressed as milligrams per liter.
If TOC concentrations greater than 10 mg/i are detected in any downgradient
monitoring well, additional sampling and analysis must be conducted to identify the
individual constituents comprising this TQC concentration. If the TOC concentration
as measured in the background monitor well exceeds 10 mg/ , 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.
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.
The results of the sampling and analysis shall be sent to the N.C, Division of
Environmental Management on Form GW -59 (Compliance Monitoring Report
Form) every April, August, and December.
2. Within forty-five (45) days of the removal from service of the subsurface disposal
system, the two (2) existing monitor wells shall be properly abandoned in
accordance with 15A NCAC 2C.01 13.
3. The Compliance Boundary delineated on the attached site map for the disposal
system is specified by regulations in 15A NCAC 2L, Groundwater Classifications
and Standards. An exceedance of Groundwater Quality Standards beyond the
Compliance Boundary is subject to the penalty provisions applicable under General
Statute 143-215.6(1)a. The sale of property, by the Permittee, which is within or
contiguous to the disposal site, may alter the location of the Compliance Boundary.
For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the subsurface disposal system, or 50 feet
within the property boundary.
If the title to any property which may affect the location of the Compliance Boundary
is changed, the Permittee shall notify the DEM Director within 14 days. The
Director shall then establish a modified Compliance Boundary which will be done as
a modification to the Permit.
The REVIEW BOUNDARY delineated on the attached site reap for the disposal
system is specified by regulations in 15 NCAC 2L, Groundwater Classifications
and Standards. A REVIEW BOUNDARY is established around disposal systems
midway between the Compliance Boundary and the perimeter of the waste disposal
area. When the concentration of any substance equals or exceeds the maximum
allowable concentration of that substance at the REVIEW BOUNDARY, as
determined by monitoring, the permittee shall either (i) demonstrate, through
predictive calculations or modeling, that natural site conditions, facility design and
operational controls will prevent a violation of standards at the Compliance
Boundary; or, (ii) submit a plan for the alteration of existing site conditions, facility
design or operational controls that will prevent a violation of standards at the
Compliance Boundary, and implement that plan upon its approval by the Director.
4. Any additional groundwater quality monitoring, as deemed necessary by the
Division, shall be provided.
9

4H1` V. INSPECTIONS
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 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 and facility
at any reasonable time for the purpose of determining compliance with this permit;
may inspect or copy any records that must be kept under the terms and conditions
of this permit; or may obtain samples of groundwater, surface water, or leachate.
VI. GENERAL CONDITIONS
1. This permit shall become voidable unless the facilities are constructed in accordance
with the conditions of this permit, the approved plans, 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 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. Prior to any transfer of this land, a notice shall be given to the new owner that gives
full details of the materials applied or incorporated at this site.
5. A set of approved plans and specifications for the subject project must be retained
by the applicant for the life of the projdct.
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 15 NCAC 2H .0205 (c)(4).
7. 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.
7

8. The wastewater treatment facility shall far-nect to a publicly owned areawide
sewage collection system within 180 days of its availability. All discharge of
wastewater to the system shall cease at the time of the connection to the sewerage
collection system. Close - out procedures of the facilities shall be submitted to and
approved by the Wilmington Regional Office Prior to the connection.
9. 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.
10. Vehicular traffic shall be prohibited on the drain field(s) except when necessary as a
part of maintenance or repair.
11. A record shall be maintained of all sludge removed from this facility. The record
shall include the name of the hauler, permit authorizing the disposal or a letter from
the permitted site agreeing to accept the sludge, date the sludge was hauled, and
volume of the sludge removed.
12. The depressional area adjacent to the disposal area must be maintained at least 20 ft.
MSL.
13. 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.
14 issuance of this Permit hereby voids Permit No. 12218 issued September 24,
1985.
Permit issued this the 26th day of April, 1991
NORTH CAROLINA
George T. Everett, l
Division of Environ
J By Authority of the
PERMIT NO. WQ0004604
AL MANAGEMENT COMMISSION
Management Commission

41SCEL AHEOUS UNITS C04TINUED)
POINTS
.) Holding Pond for Effluent Flow Equalization and/or
(1)
Stage Discharger
J) Effluent Pumps . . . . . . . . • . . . . _ _ .
d)Dosing PU11TS
In -Plant Pumps (including air lifts). . . . . . . .
`) St2nd-8y Power Supply
OESICN FLOW OF PLANT IN GPO (not applicable to non-
. . . . . . . . . . . . . . .
1) Thermal Pollution Contra! Device . . .. . . _ .
lS%
3
r) Treatment Processes for Removal of Metal or Cyanide
and
other Toxic Materials . . . . . . . . . . . . . .
30
Total Points
C:t ASS l F I CATION
Class I . . . . . . . . . . . . . . . . 5 - 25 Points
Class Ii . . . . . . . . . . . . . . . 26 - 50 Points
Class Ill . . . . . . . . . . . . . . . 51 - 65 Points
Class IV . . _ . . . . . . . . . . 66 - Up Points
Facilities having a rating of one through four points, inclusive,
not require a Certified operator. ClassiFicatien of all other
cilities requires a comparable grade operator in responsible,char•ge.
a
-4-
North Carolina
Division of Environmental Hanagement
Checklist of Facility Components
To be Used In DetCA-vii nq Facility Clas:iiication
All information ++ill br. prints
rlarc of PIant 09C -en Va11a9P IIxi7,itieS.__1UC-0--P.oia..tccL.—_---- OHner or Contact Person Jack Stocks, Owner/President 919 763-8127
ie epnone
Ma'li;rg Address 211 North 5th Av. , Wilmington, NC 28461
Street or P.O. Box NP,. Torn or City lip
Permit Humber InformatEon Construction Status
NPOES Permit No. N /A. Please Check:
Existing Facility X
Date Issued _ _ N f A —_ Upgraded Faci I i ty
New Facility
State Permit Bio. — If Upgraded or ,Sew Facility, Give:
Q(�OO�6fl�F
501' Corr,pleticn Date
Date Issued �en�0n 1001' Completion Date
Rarrd by
Paul Rawl _ --Regional Office Wi jm�rtp-n__oate
Operator in Responsible Charge -.1.l Qrathwol Grade —
Design Flew of Plant in GPD g�,rd _ Plant Class TT
iTF.M
P0I10'5
(1)
PRETREATMENT UNITS (,ee definition mo. 34) . . . . . .
2
(2)
OESICN FLOW OF PLANT IN GPO (not applicable to non-
coatamin.ated Cooling waters and non -discharging systems}
0 -- 20,000 . . . . . . . _ . . . .
l
20,001 - - 50.000 _ . . . . . . . . . . . . . .
501001 -- 100.000 _ . . . . . .
3
100,001 - 250,000 . . . . . . . . . . . . . . . . . .
4
250,001 500,000 . . . . . . . . . . . . . . . . . .
5
500,0111 -- 1.000.000 . . . . . . . . . . . . . . . . . .
8
1,000.001 -- 2.000,000 .
10
2.,000,001 (and up) - rate I point additional for Each 200,000
GPD r,,n.tcity up to a maximum of
30
Design flow (GPO):
(3)
^�
PRELIMINARY UNITS (see detrnition No.
a) Influent Punps (including air lift) . . . . . . _ . .
3
b) Bar Screens . . . . . . . . . . . . . . . . . . . .
1
or
(C) Mechanical Screens, Static Screens or Conninuting
Devices . . . . . . . . . . . . . . . . . . . . .
2
(d) Grit Removal or . . . . . . . . . . . .
1
(e) mechanical or Aerated Grit Removal . . . . . . . . .
2
(r) F70w Measuring Device or . . . . . . .
I
(g) irri_rumented Flow Measureient . . . . . . . . . .
Q
Effective
7/1/83
1

(5)
(o)
POINTS
(h)
Preaeration or E"aIization . . . . . . . .
ITEM
(i)
Grease or Oil Separetors -- Gravity
Land Application (see definition No. 23b)
Mechanical .
3
Aerated . , . . . .
5
{j)
Chemical Conditioning . . . . . .
5
PRIe.ARY TREATMENT UNITS
(a)
Septic. Tank (see de`inition No. 44) . . . . . .
20
(b)
rmhoff Tank . . . . . . . . . . , . . . .
Polishing Ponds- Without aeration, . . . . . .
(c)
Primary Clerifiers (including sludge air lifts) . .
(d)
Settling Pc:rds or 1�etLling Tanks for Inorganic NO -
(m)
Toxic ilatcrials ;nvolvinq a Oischarge to the Surface
0
waters (sand, gravel, stone, and other mining operations
Diffused or Meclianicai . . . . . .
5
except recreational activities such as gem or gold
(n)
Pro -Package Unit for Removal of 0i1 and Grease
mining) . . . . . . . . . . . . . . . . . . . . . ..
10
SECONDARY TREATMENT UNITS
Reverse Osmosis . . . . . . . . . . . . .
(a)
Carbonaceous Stage
(p)
Sand or Mixed -Media Filters -- Low Rate
(i) Aeration - High P:Erlty Oxygen System . . . .20
(0
Diffused Air System
5
(7)
Mechanical Air Systern (fixed, floating or rotor)
E
Sellarate Sludge RC61_r',30011 . . . . .
3
10
(ii) Trickling Filter - High Rate . . . . . .
7
Aerobic . . . _ . •
SI',arld=lyd Ra LI:
5
PaCked Tower-
5
(iii)
,!crated Lagoons . . . . .
io
10
{iv) !locating Biological Contactors (biodisc). . .
10
Sludge Drying Beds . . . . . . . . . .
(v) Sand Filters. (intermittent biological) . .
2
(d)
(vi) Stabilization Lagoons with Outlet to Stream .
5
(vii)
Clarifier (including sludge air lifts)_ . . .
5
(b)
Nitrogenous Stage
( f )
Sludge Thickener . . . . . . . . . . . . . . . . .
(i) Aeration - High Purity Oxygen System. . . . .
20
(cg}
Dfffused Air Systems. . . . . . . . . .
10
Mechanical Air System (fixed, floating, or rotor)S
`;lunge Holding Tank -- Aerated . . . . . . . " . .
Separate Sludge Reaeration . , . . . . .
3
(ii) Trickling Filter - INSh Rate . . . . . .
7
Standard Rate . . . .
5
Packed Toner. . . . . . .
5
regeneration) . . . . . . .
liotaLing Biological ConLactors (biodisc)
10
(j)
(iv) Sand Filter (inLerrmiCL•int bi0)ogieaI). .
2
(8)
(v) Clarifier (including sludge air lifts)
5
TERTIARY
OR ADVANCED TREATHE'{T UNITS
(a)
(a)
Activated Carbon Beds - Without Carbon regeneration
5
{b)
With Carbon regeneration.
l5
(b)
Powdered or Granular Activated Carbon Feed - Without
23a) . . . . . . . . . . . _
10
" Carbon regeneration
5
Landfilled (burial) . , . . . _ . . . . . .
With Carbon regeneration.
15
(c)
funnonia SLrippinc, . . . . . . . . . . . . . .
18
(d)
Chall icaI Add ILir,M . . . . . . .
5
{a)
D{: n i tri f i cd L i on (; epa r'at.o process). - -
i0
(f)
Electrodialysis . . . . . . . . . . . . . . . . .
5
(g)
Foam Separation . . . . . . . . . . . . . . . . .
5
(h)
Ion 'Excr,rnge. . . . . . . . . . . . . . . . .
5
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ITEM
POiNT5
('i)
Land Application (see definition No. 23b)
p
(not applicable for facilities under 10(a) . . . .
(j)
Microscreens . . . . . . . . . . . . . . ... . . .
5
(k)
Phosphorus Removal . . , _ . " . . . " .
20
(1)
Polishing Ponds- Without aeration, . . . . . .
2
With aeration . . . . . _ . . . .
5
(m)
Post Aeration •- Cascade . . ,. . . , . "
0
Diffused or Meclianicai . . . . . .
5
(n)
Pro -Package Unit for Removal of 0i1 and Grease
30
(o)
Reverse Osmosis . . . . . . . . . . . . .
(p)
Sand or Mixed -Media Filters -- Low Rate
High P,a t•z . . .
5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank -- Heated . . . . . , .
10
Aerobic . . . _ . •
5
Unheated . . . . . .
3
(b)
Sludge Stabilization (chemical or thermal] . . . .
10
(c)
Sludge Drying Beds . . . . . . . . . .
2
(d)
Sludgjo Elutriation . . . . .
5
(e)
Sludge Conditioner (chemical or chenaal) . . . .
5
( f )
Sludge Thickener . . . . . . . . . . . . . . . . .
2
(cg}
SIud(l�_ Gas UtiIi a11On (ialciudincj g,ts >tur'o1e). . .
(h
`;lunge Holding Tank -- Aerated . . . . . . . " . .
Hon -aerated .
(i)
Sludge Incinerator (not including activated carbon
regeneration) . . . . . . .
10
(j)
Vacuum Filter, Centrifuge or Filter Press . . . .
10
(8)
SLUDGE
DISPOSAL (including -incinerated ash)
(a)
Lagoons .. . . . . _ . . . . . .
2
{b)
Land Application (surface and subssurface) (see def.
23a) . . . . . . . . . . . _
10
(c)
Landfilled (burial) . , . . . _ . . . . . .
5
(g)
DISINFECTION
(a)
Pre
1
b)
Intermediate . . . . . . . . . . . . . . . . . .
(c)
Post . . . . . . . . . . . . . . .
l
( d )
DechiurinaLion . . . . . . . . . . . . . . . . . .
5
(e)
Chlorine or ozone Generation . . . . . . .
5
(f)
Radiation . . . . . . . . . . . . . . . . . . .
3
(10)
MISCELLANEOUS
UNITS
(a)
Holding Ponds or Holding Tanks for Inorganic, Non-toxic
Materials with no Discharge CO the Surface Waters
2
(Sludge handling facilities for water purification
plants, sand, gravel, crushed stone and other similar
operations --see definition No. 10)
(b)
Holding Ponds or Holding Tanks for Organic or Toxic
Materials with no Discharge to the surface Waters
R
(Any puFnp, valve, or other mechanical control subject
to failure creating a potential for bypass or discharge
from the holding ponds or tanks will necessitate a
minimum classification of Class I requiring a certified
opera t0 r ) .
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