WQ0004801_Final Permit_19920312

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
S 12 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor George T. Everett, Ph.D
William W. Cobey, Jr., Secretary Director
March 12, 1992
The Honorable Harvey Lewis, Mayor
Town of Middlesex
Post Office Box 69
Middlesex, North Carolina 27557
Subject: Permit No. WQ0004801
Town of Middlesex
Land Application of Sludge
Nash County
Dear Mayor Lewis:
In accordance with your application received March 7, 1991, we are forwarding herewith Permit
No. WQ0004801, dated March 12, 1992, to the Town of Middlesex for the operation of a land application
of sludge program.
This permit shall be effective from the date of issuance until February 28, 1997, 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.
Regional Offices
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/733-2314 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

The Honorable Harvey Lewis, Mayor
Town of Middlesex
March 12, 1992
Page 2
One set of approved site maps is attached. If you need additional information concerning this
matter, please contact Mr. Dana J. Bolden at 919/ 733-5083.
OGeorge
ly,
T.Ev tt
cc: Nash County Health Department 6
Michael S. Acquesta, P.E., Peirson & Whitman, Incorporated
Raleigh Regional Office, Water Quality Section
Raleigh Regional Office, Groundwater Section
Jack Floyd, Groundwater Section Central Office
Training and Certification
Facilities Assessment Unit

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SLUDGE LAND APPLICATION 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
Town of Middlesex
Nash County
FOR THE
operation of a sludge land application program consisting of the land application of sludges from the
sources listed in Condition H-4 to the sites listed in Condition VI-5 with no discharge of wastes to the
surface waters, pursuant to the application received March 7, 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 February 28, 1997, and shall be
subject to the following specified conditions and limitations:
I. J!ERFQRMANCE STANDARDS
1. The Raleigh Regional Office, phone no. [phone], and the appropriate local
governmental official (county manager/city manager) shall be notified at least twenty-four
(24) hours prior to the initial application of the sludge so that an inspection can be made of
the application sites and application method. 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. Also the Nash County Manager's office must
be notified prior to the initial application so that they will be aware that the operation has
commenced.
2. This permit shall become voidable if the soils fail to adequately absorb the wastes and may
be rescinded unless the sites are maintained and operated in a manner which will protect
the assigned water quality standards of the surface waters and ground waters.
3. The land application program shall be effectively maintained and operated as a non -
discharge system to prevent the discharge of any wastes resulting from the operation of this
program.
4. 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.

5. In the event that the land application program is not operated satisfactorily, including the
creation of nuisance conditions, the Permittee shall cease applying sludge to the sites and
take any immediate corrective actions, including the construction of additional or
replacement wastewater treatment or disposal facilities.
b. No crops for direct human consumption shall be raised on these sites for a period of 18
months following sludge application.
7. Maximum slope for sludge application shall be 10% for surface application and 18% for
subsurface applications.
8. The following buffers zones shall be maintained:
a)
400 feet from residences or places of public assembly under separate ownership for
surface application method; however, the buffer zone requirement may be reduced
to a minimum of 100 feet upon written consent of the owner and the appropriate
DEM regional office,
b)
200 feet from residences or places of public assembly under separate ownership for
injection method; however, the buffer zone requirement may be reduced to a
minimum of 100 feet upon written consent of the owner and the appropriate DEM
regional office,
c)
100 feet from "SA and SB" classified waters and public surface water supplies for
both methods,
d)
50 feet from "WS" classified waters and other streams, creeks, lakes, rivers, and
surface water drainage ways for injection method,
e)
100 feet from "WS" classified waters and other streams, creeks, lakes, rivers and
surface water drainage ways for surface application method,
f)
100 feet from property lines for both methods; however, this requirement may be
reduced upon written concurrence from the adjoining property owner and the
appropriate DEM regional office,
g)
50 feet from public right of ways for surface application methods,
h)
25 feet from public right of ways for subsurface disposal methods,
i)
10 feet from upslope interceptor drains and surface water diversions for both
methods,
j)
25 feet from downslope interceptor drains, surface water diversions, groundwater
drainage systems and surface drainage ditches for both methods.
9. A copy of this permit shall be kept at the land application site when sludge is being applied
during the life of this permit. A spill prevention and control plan shall be kept in all sludge
transport and application vehicles.
10. All sludges included in this permit must be stabilized by a process to significantly reduce
pathogens (as described in 40 CFR Part 257, Appendix II) prior to application or
incorporation. An evaluation of all sludges as specified in condition U 4 must be conducted
as to their ability to demonstrate compliance with this requirement. Any change in the
stabilization method used must be reported to the Raleigh Regional Office prior to intiation
of change.
11. Specific sludge application area boundaries shall be clearly marked on each site prior to and
during sludge application.
12. No sludge at any time shall be stored at any application site.
1. The facilities and disposal sites shall be properly maintained and operated at all times.
2

2.
3
4.
A suitable vegetative cover as listed in condition II 3, shall be maintained in accordance
with the crop management plan approved by this Division.
The application rates shall not exceed the following for the specified crops:
Crops
PAN flb�bcre/yearl
Corn
200
Soybeans
150
Pasture
200
Oats
100
Wheat
100
Barley
100
No sludges other than the following are hereby approved for land application in accordance
with this permit:
Permit Estimated
Source County Number Volume
Middlesex WWTP Nash NCO021563 180,000 Gallons
Polishing Lagoon
One-time application
Middlesex WWTP Nash NCO021563 1,000 Gallons/month
The lifetime heavy metal loadings shall not exceed the following for the corresponding
Cation Exchange Capacities (CEC):
Lifetime Loadings llbs/acre)
Parameter
CEC <
Ems- 1
E� C > 15
Lead
500
1000
2000
Zinc
250
500
1000
Copper
125
250
500
Nickel
125
250
500
Cadmium
4.5
9
18
6. Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater 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.
7. Adequate procedures shall be provided to prevent surface runoff from carrying any
disposed or stored sludge material into any surface waters.
8. Animals shall not be grazed on sludge applied land within a 30-day period following the
sludge application. Application sites that are to be used for grazing shall have fencing that
will be used to prevent access after each application.
9. Surface applied sludge will be plowed or disced within twenty-four (24) hours after
application on lands with no cover crop established.
10. For areas that are prone to flooding or within the 100-year flood elevation, sludge may be
applied only during periods of dry weather. The sludge must be incorporated into the soil
within twenty-four (24) hours of application.
3

11. Appropriate measures must be taken to control public access to the land application sites
during active site use and for the 12-month period following the last sludge application
event. Such controls may include the posting of signs indicating the activities being
conducted at each site.
12. Adequate provisions shall be taken to prevent wind erosion and surface runoff from
conveying pollutants from the sludge application area onto the adjacent property or into the
surface waters.
13. Sludge shall not be applied in inclement weather or until 24 hours following a rainfall event
of 1/2-inch or greater in 24 hours. Any emergency sludge disposal measures must first be
approved by the Division of Environmental Management.
14. The site shall be adequately limed to a soil pH of at least 6.5 prior to sludge application.
Sludge may be applied to sites with a pH of less than 6.5 provided a sufficient amount of
lime is also applied to achieve a final pH of the lime, sludge and soil mixture of at least 6.5.
III. MONITORING AND REPORTING REQUIREMENTS
1. Any monitoring (including groundwater, surface water, sludge, soil, or plant tissue
analyses) deemed necessary by the Division of Environmental Management to insure
protection of the environment will be established and an acceptable sampling and reporting
schedule shall be followed. If monitoring data indicates minimal or no concern to the
Division, reduction of monitoring requirements may be pursued after two annual reporting
periods.
2. Proper records shall be maintained by the Permittee tracking all disposal activities. These
records shall include, but are not necessarily limited to the following information:
a) source of sludge
b) verification of stabilization to PSRP levels and method of stabilization
c} date of sludge application
d) location of sludge application (site, field, or zone #}
e) method of application
f) weather conditions
g) soil conditions
h) type of crop or crop to be grown on field
i) volume of sludge applied in gallons/acre and dry tons/acre
j) annual and cumulative totals of dry tons/acre of sludge, annual and cumulative
pounds/acre of each heavy metal (which shall include, but not be limited to
lead,nickel, cadmium, copper and zinc), annual pounds/acre of plant available
nitrogen (PAN), and annual pounds/acre of phosphorus applied to each field.
3. A representative annual soils analysis (Standard Soil Fertility Analysis) shall be conducted
of each site receiving sludge in the respective calendar year and the results maintained on
file by the Permittee for a minimum of five years. The Standard Soil Fertility Analysis
shall include, but is not necessarily limited to, the following parameters:
% Base Saturation
Manganese
Magnesium
Cation Exchange Capacity
Phosphorus
Sodium
Potassium
Nickell
Leadx
Cadmiumi
Zinc1
Copper,
pH
Calcium
4

Soils analysis for these parameters shall be conducted once prior to permit renewal
on each site which has received sludge during the permit cycle.
4. A quarterly sludge analysis and annual Toxicity Characteristics Leaching Procedure
(TCLP) analysis shall be conducted by the Permittee and the results maintained on file by
the Perrnittee for a minimum of five years. If land application occurs at a frequency less
than quarterly, sludge analysis will be required for each instance of land application. A
representative sample of the sludge to be removed from the polishing lagoon shall be
subjected to both a sludge analysis and TCLP analysis.
The sludge analysis shall include but is not necessarily limited to the following parameters:
% total solids
Magnesium
Chlorides
Sulfate
Phosphorus
Potassium
Lead
Zinc
Copper
Nickel
Cadmium
Chromium
Sodium
Calcium
Total Nitrogen
Ammonia Nitrogen
Nitrate/Nitrite Nitrogen
pH
Plant Available Nitrogen (by calculation)
The TCLP analysis shall include the following parameters:
Arsenic
Barium
Benzene
Cadmium
Carbon tetrachloride
Chlordane
Chlorobenzene
Chloroform
Chromium
o-Cresol
m-Cresol
p-Cresol
Cresol
2,4-D
1,4-Dichlorobenzene
1,2-Dichloroethane
1,1-Dichloroethylene
2,4-Dinitrotoluene
Endrin
Heptachlor (and its hydroxide)
Hexachlorobe.nzene
Hexachloro-1,3-butadiene
Hexachloroethane
Lead
Lindane
Mercury
Methoxychlor
Methyl ethyl ketone
Nitrobenzene
Pentaehlorophenol
Pyridine
Selenium
Silver
Tetrachloroethylene
Toxaphene
Trichloroethylene
2,4,5-Trichlorophe nol
2,4,6-Trichlorophenol
2,4,5-TP (Silvex)
Vinyl chloride
5. Three copies of all monitoring and reporting requirements as specified in conditions III 1,
1112, 1113 and III 4 shall be submitted annually on or before March 1 of the following year
to the following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
R

6. Noncompliance Notification:
The Permittee shall report by telephone to the Raleigh Regional Office telephone no.
[phone], 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 with the land application program which results in the land
application of significant amounts of wastes which are abnormal in quantity or
characteristic.
b. Any failure of the land application program resulting in a release of sludge material
to receiving waters.
C. Any time that self -monitoring information indicates that the facility has gone out of
compliance with the conditions and limitations of this permit or the parameters on
which the system was designed.
d. Any process unit failure, due to known or unknown reasons, that render the facility
61, incapable of adequate sludge treatment.
e. Any spillage or discharge from a vehicle or piping system transporting sludge to the
application site.
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. G-IROUND3YATER REQUIRE MENTS
1. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
V . INSPECTIONS
The Permittee or his designee shall inspect the sludge storage, transport, 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 by the Division of Environmental Management or other permitting authority.
2. 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,
0

VI. GENERAL CQNDITIONS
1. This permit shall become voidable unless the land application activities are carried out in
accordance with the conditions of this permit and in the manner approved by this Division.
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 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. This permit shall become voidable unless the agreements between the Permittee and the
landowners/lessees are in full force and effect.
a.
5. The following are approved sites for sludge application (see attached map):
Site No.
Owner/Lessee
Application Areal acres
DD003
Donald Dean
5.13
DD004-A
Donald Dean
4.47
DD004-B
Donald Dean
1.95
DD004-C
Donald Dean
4.16
WP013
William (Bill) Powell
8.45
WP015
William (Bill) Powell
15.98 _
Total
40.14 acres
1 - Application Area excludes buffer areas.
Sludge shall not be applied to the Dean sites from November through April, inclusive, due
to expected seasonal high water table.
6. 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 143-215.6A to 143-215.6C.
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 revolve this permit as specified by 15 NCAC 2H .0205
(c)(4).
8. 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.
9. A set of approved documents for the subject project must be retained by the applicant for
the life of the permit.
10. 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.
7

11. This permit may be modified, or revoked and reissued to incorporate any conditions,
limitations and monitoring requirements the Division of Environmental Management deems
necessary in order to adequately protect the environment and public health.
Permit issued this the 12th day of March, 1992
CAROLINA ENWRONMENTAL MANAGEMENT COMMISSION
George T. Ever tt, Direct
Division of En vir en agement
By Authority of the En R ental Management Commission
Permit No. WQ0004801
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RATING SCALE FOR CLASSIFICATION OF FACILITIES
ITEM
(1)
(2)
(3)
Name of
Plant: 7;lrl .0-C
County: Illa,A Telephane:`119/23-5= `7077
NPOES Permit No. NCOO Nondisc. Per. No.4✓QOQ��fB�� _
IssueDate: Expiration Date: .?,,/ 77
Existing Facility New Facility
Rated By: j,30 df Date:_ 9 :�' —2-
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
Me]
Grade
Plant Class: (circle one) 6V Il II) IV Total Points_/D
POINTS
Industrial Pretreatment Units andlor
Industrial Pretreatment Program
(see definition No. 33)
4
DFSIGN FLOW OF PLANT IN GPD
(not applicable to non -contaminated cooling waters, sludge
handling facilities for water purification plants, totally
closed cycle systems (def. No. 11), and facilities
consisting only of Item (4) (d) or Items (4) (d) and (11) (d))
0 -- 20,000............... I..........
1
20,001 -- 50,000..........................
2
50,001 100,000..........................
3
100,001 -- 250,000..........................
4
250.001 -• 500,000..........................
5
500.001--1,000,000..........................
a
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)
PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens ................................ 1
Of
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........................ 2
(c) Grit Removal ............................... 1
or
(d) Mechanical or Aerated Grit Removal ........... 2
(e) Flow Measuring Device ....................... 1
or
(f) Instrumented Flow Measurement .............. 2
(g) Preaeration................................ 2
(h) Influent Flow -Equalization ................... 2
(i) Grease or Oil Separators - Gravity.......... 2
Mechanical ... ... 3
Dissolved Air Flotation. 8
0) Prechlorinalion .............................. 5
(4) PRIMARY TREATMENT UNITS
(a) Seplic Tank (see definition no. 43) ..............
(b) Imhoff Tank ..................................
(c) Primary Clarifiers ..... ........... .
(d) Settling Ponds or Settling Tanks for Inorganic
Non -toxic Materials {sludge handling facilities
for water purification plants, sand, gravel,
stone, and other mining operations except
recreational activities such as gem or gold
MirkinMI......................................
2
5
5
2
;;ap7
all-I,fir° S
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System .... .
Diffused Air System ...........
Mechanical Air System (fixed,
floating or rotor) ..............
Separate Sludge Reaeration . _ .. .
(ii) Trickling Filter
High Rate ... . .............. .
Standard Rate ...............
Packed Tower.. .............
(iii) Biological Aerated Filter or Aerated
Biological Filter ......................
(iv) Aerated Lagoons ..................... .
20
10
10
10
(v) Rotating Biological Contactors ....... _ .. 10
(vi)
Sand Filters -
intermittent biological .....
2
recirculating biological .....
3
(0) Stabilization Lagoons ...................
S
(viii)Clarifier ..............................
5
(Ix)
Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see def. No. 12) (Points for this item
have to be in addition to items (5) (a)
(i) through (5) (a) (vitl) .................
E
(x)
Nutrient additions to enhance BOD
removal...............................
(xi)
Biological Culture ("Super Bugs') addition
to enhance organic compound removal .....
(b) Nitrogenous Stage
(i)
Aeration - High Purity Oxygen System .....
21.
Diffused Air System ...........
i r
Mechanical Air System (fixed,
floating, or rotor) ...... .....
i
Separate Sludge Reiteration .....
(if)
Trickling Filter -
High Rate ..............
Standard Rate ............
Packed Tower.......... .
(iii)
Biological Aerated Filler or Aerated
Biological Filter .........................
1
(iv)
Rotating Biological Contactors ............
1
(v)
Sand Filler-
inlermitlent biological ........
recirculating biological ........
(v 1)
cfariiier................................

ft.
aZP
(6) TERTIARY OR ADVANCED TREATMENT UNIT
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(a) Activated Carbons Beds -
(not applicable to chemical additions rated as item
without carbon regeneration .................. 5
(3) ()) (5) (a) (xl), (6) (a), (6) (b). (7) (b), (7) (e),
with carbon regeneration .................... 15
(9) (a), (9) (b), or 19) (c) 5 points each: List:
(b) powdered or Granular Activated Carbon Feed •
, , _ , , ;
without carbon regeneration ................. 5
with carton regeneration . . .. ..... . ..... is
.... . +,
(c) Air Stripping ........................ .. 5
... . .
(d) Denturification Process (separate process) ..... 10
(e) Efectrodalysis ... _ s .................... 5
(11) MISCELLANEOUS UNITS
(q Foam Separation .............................. 5
(a) Holding Ponds, Holding Tanks or Settling Ponds
(g) Jon Exchange ................................ 5
for Organic or Toxic Materials including wastes
(h) sand Application of Treated Ellluenl
from mining operations containing nitrogen and/or
(see definition no. 22b) (not applicable for
phosphorous compounds in amounts significantly
sand, gravel, stone and other similar mining
greater than is common for domestic wastewater ..........
operations)
(b) Effluent Flow Equalization (not applicable to storage
(i) on agriculturally managed sites (See def.
basins which are inherent in land application systems)_ ;
No_ 4) ................................... 10
(c) Stage Discharge (not applicable to storage basins
(ii) by high rate infiltration on non -agriculturally
inherent in land application systems .......................................
managed sites (includes rotary distributors
(d) Pumps .........:................
and similar fixed nozzle systems) ........... 4
(e) Stand -Hy Power
(-W) by subsurface disposal (includes low pressure
(f) Thermal Pollution Control Device :.................................... ;
pipe systems and gravity systems except at
plants consisting of septic lank and nitrifica-
tion fines only) ............................ 4
TOTAL POINTS
(� Microscreens.................................. 5
(j) Phosphorus flemo+al by Biological Processes
CLASSIFICATION
(See def. No. 26) ............................20
(k) Polishing Ponds - ' without aeration ....... 2
Glass 1._. ». _ 5 - 25 Points
,with aeration .......... 5
Class 26- 50 Points
(1) Post Aeration - cascade .............. 0
Class Ill ..................51- 65 Points
diffused or mechanical ... 5
Class tV... .. _ 66- Up Points
(m) Reverse Osmosis ...... :........................ 5
(n) Sand or Mixed•IAedia Fitters - low rate ........... 2
Facilities having a rating of one through four points, Inclusive,
high rate .......... 5
do not require a certified operator. Classification of all other
(o) Treatment processes for removal of metal or
facilities requires a comparable grade operator in responsible
cyanide .................................... 15
charge.
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ......... is
Facilities having an activated sludge process will be assigned
a minimum classification of Class 11.
1 SLUDGE TREATMENT
Facilities having treatment processes for the removal of meta!
(a) Sludge Digestion Tank - Heated ............... 10 or cyanide will be assigned a minimum classification of Class 11.
Aerobic ...............
5
Unheated ...... .......
3 Facilities having treatment processes for the biological removal
(b) Sludge Stabilization (chemical or thermal) .......
2 of phosphorus will be assigned a minimum classification of Class
(c) Sludge Drying Beds - Gravity ................ •
I l I.
vacuum Assisted .......
5
(d) Sludge EluWation .............................
5 In -plant processes and related control equipment which are an
(e) Sludge Conditioner (chemical or thermal) ........
5 integral part of industrial production shall not be considered waste
(f) Sludge Thickener (gravity) ......................
5 treatment. Likewise, discharges of wastewater from residences
(g) Dissolved Air Flotation Unit
having a design flow of 1.000 gpd or less, shall not be subject to
(not applicable to a unit rates as (3) () .........
8 rating.
(h) Sludge Gas Utilization (including gas storage) ....
2
(i) Sludge Holding Tank - Aerated ................
5 ADDITIONAL UMMENTS:
Non -aerated .........
2
(i) Sludge incinerator - (not including activated
carbon regeneration) .....
10
(k) Vacuum Filter, Centrifuge or Filter Press or other
similar dewalering devices ....................
10
(8) SLUDGE DISPOSAL (including incinerated ash)
(a) Lagoons .........................................
(b) land Application (surface and subsurface)
2
Y
(see definition 22a)
-where the facility holds the land app. permit . . CiD—)
operator wh
-by cant+acting to a land application
holds the land application permit ... ...... .....
2
-land application of sludge by a contractor who does
not hold the permit for the wastewater treatment
facility where the sludge,is generated .........
10
(c) Landlilled (burial] ..... ......... I ...............
5
(9) DISINFECTION
5
(a) Chlorination . . .......................... .
5
(b) Dechlorination ........................
(c) Ozone ..............................
5
5
(d) Radiation ..........................