WQ0006594_Final Permit_19930628

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27604
James B. Hunt, Jr., Governor
June 28, 1993
Mr. Timothy Cole, Environmental Affairs Manager
Unifi, Incorporated
Post Office Box 698
Yadkinville, North Carolina 27055
Dear Mr. Cole:
Jonathan B. Howes, Secretary
Subject: Permit No. WQ0006594
Permit Amendment
Unifi, Inc. Plant # 2 Reidsville
Unifi, Inc. Plant # 15 Mayodan
Land Application of Sludge
Rockingham County
In accordance with your application received April 2, 1993, we are forwarding herewith Permit
No. WQ0006594 dated June 28, 1993, to Unifi, Incorporated for the operation of a land application of
sludge program. This permit amendment is for the addition of new land application sites. Proposed sludge
application Field No. UN4-2 is not approved because bedrock is less than one foot below land surface.
Please be advised that this permit does not authorize the application of any residuals that contain
domestic waste. Prior to any mixing of domestic wastes with the permitted industrial residuals, a permit
amendment must be obtained from the Division.
This permit shall be effective from the date of issuance until August 31, 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. Issuance of this permit hereby
voids Permit No. WQ0006594 issued March 19, 1993.
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 919/571-4700 919/946-6481 919/395-3900 9191896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

If you need additional information concerning this matter, please contacJohn Seymour at 919/
733-5083.
Sincerely,
OWJ�.��
A. Pres n Howard, Jr., P.E.
Director
cc: Rockingham County Health Department
Environmental Waste Recycling Incorporated
Winston-Salem Regional Office, Water Quality Section
Winston-Salem 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
Unifi, Incorporated
Rockingham County
601V�M V ,
operation of a sludge land application program consisting of the application of approximately 70 dry tons
per year of sludge from the Unifi, Inc. Plant No. 2 Reidsville and the Unifi, Inc. Plant No. 15 Mayodan
wastewater treatment facilities to approximately 234.4 acres of land in Rockingham County with no
discharge of wastes to the surface waters, pursuant to the application received April 2, 1993, and in
conformity with the project plan, specifications, and other supporting data subsequently filed and
approved by the Department of Environment, Health and Natural Resources and considered a part of this
permit.
This permit shall be effective from the date of issuance until August 31, 1997, and shall be subject
to the following speed conditions and limitations:
The Winston-Salem Regional Office, telephone number 919/ 896-7007 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 Mayodan Plant 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 Rockingham
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 Pem- ittee 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 buffer 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) 50 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.
Some of the buffers specified above may not have been included in previous permits
for this land application operation. Any sites or fields that are included in this permit,
but were approved with different applicable buffers, will continue to be regulated by
those originally approved buffers. All new sites and fields will be regulated by the
buffers specified above.
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. No domestic sludges shall be land applied or mixed with the sludges that are listed as part
of this permit.
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.
2

1.
2.
3.
The facilities and disposal sites shall be properly maintained and operated at all times.
A suitable vegetative cover as listed in condition 113, shall be maintained in accordance
with the chop management plan approved by this Division.
The application rates shall not exceed the following for the specified crops:
Crop
PAN llbJacr 4/
Alfalfa
250
BIue Grass
220
Coastal Bermuda Grass
350
Corn (Silage & Grain)
200
Cotton
100
Fescue
250
Forest (Hardwood & Softwood)
75
Small Grain (Wheat, barley, milo, oats)
100
Sorghum
120
Soybeans
150
Sudex (Hay)
160
Sudex (Silage)
200
Timothy, Orchard, & Rye Grass
200
4. No sludges other than the following are hereby approved for land application in accordance
with this permit:
Permit Estimated
Source n m r Volume ( d1y ton ar
Unifi, Inc. Rockingham City of Reidsville 30.0
Plant No. 2 WWTP
Unifi, Inc. Rockingham Town of Mayodan 40.0
Plant No. 15 WWTP
Total 70.0
5. The lifetime heavy metal loadings shall not exceed the following for the corresponding
Cation Exchange Capacities (CEC):
Lifetime Loadings_llbs(a )
Parameter
-
E c
CEC 5 - 15
CEC
Lead
500
1000
2000
Zinc
250
500
1000
Copper
125
250
500
Nickel
125
250
500
Cadmium
4.5
9
18
3

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 (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 II, III, and IV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A, .0202.
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.
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.
I. 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.
rd

2. Proper records shall be maintained by the Perminee tracking all disposal activities. These
records shall include, but are not necessarily limited to the following information:
a) source of sludge
b) date of sludge application
c) location of sludge application (site, field, or zone #)
d) method of application
e) weather conditions
f) soil conditions
g) type of crop or crop to be grown on field
h) volume of sludge applied in gallons/acre and dry tonslacre
i) 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
Magnesium
Phosphorus
Potassium
Leadz
Zinc
pH
Manganese
Cation Exchange Capacity
Sodium
Nickell
Cadmiumt
Copper
Calcium
1 Soils analysis for these parameters shall be conducted once prior to permit renewal on
soils from 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 Permittee 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.
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)
Hexachlorobenzene
Hexachloro-1,3-butadiene
Hexachloroethane
Lead
Lindane
Mercury
Metboxychlor
Methyl ethyl ketone
Nitrobenzene
Pentachlorophenol
Pyridine
Selenium
Silver
Tetrachloroethylene
Toxaphene
Trichloroethylene
2,4,5-Trichlorophenol
2,4,6-Trichlorophenol
2,4,5-TP (Silvex)
Vinyl chloride
5. All sludges included in this permit must be monitored for compliance with condition 110 of
this permit. Data to verify that no domestic sludge is mixed with the sludges that are listed
as part of this permit, or land applied in any form on the application sites listed as part of
this permit, must be maintained by the Permittee. The required data should be sufficient to
clearly demonstrate compliance.
6. Three copies of all monitoring and reporting requirements as specified in conditions III 1,
111 2, III 3, HI 4, and IH 5 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
7. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem Regional Office, telephone
number 919/ 896-7007 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
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.
The Compliance_BoundgZ 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 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 system site may alter 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 application area 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 permitwe shall notify the Division 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 for the disposal system is specified by regulations in 15A
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.
2. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
V . INSPECTIQNS
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.
7

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.
• �NUINVOR
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.
5. The following are approved sites for sludge application (see attached map(s)):
Site No.
OwnerlLessee
Application Areal acres
UN 1-1
Clinton Hanks
4.0
UN 1-2
Clinton Hanks
3.3
UNI-3
Clinton Hanks
13.2
UNI-6
Clinton Hanks
12.0
UN 1-12
Clinton Hanks
3.5
UNI -14
Clinton Hanks
5.0
UNI-16
Clinton Hanks
2.8
UN 1-17
Clinton Hanks
3.3
UN 1-19
Clinton Hanks
15.0
UN 1-20
Clinton Hanks
3.8
UNI-22
Clinton Hanks
3.3
UNI-23
Clinton Hanks
3.8
UNI-24
Clinton Hanks
6.0
UNI -25
Clinton Hanks
5.0
UN1-26
Clinton Hanks
3.5
UNI-27
Clinton Hanks
6.0
UN1-28
Clinton Hanks
2.8
UN3-1
Robert Coleman
6.0
UN3-2
Robert Coleman
12.0
UN3-3
Robert Coleman
4.2
U N4-1
William Dick
13.4

The following are approved sites for sludge application that require specified modifications
and/or deletions (see attached map(s)):
Site No.
_ _Owner/Lessee
Application Areal acres
UN1-5
Clinton Hanks
9.0
Insure minimum 50 ft. buffer
from floodplain
UN1-7
Clinton Hanks
25.2
Delete southwest comer and
northern tip from site where
low (potentially wet) areas
exist
UN1-8
Clinton Hanks
8.0
Require incorporation within
24 hours*
UN1-9
Clinton Hanks
7.2
Require incorporation within
24 hours*
UN 1-10
Clinton Hanks
4.6
Require incorporation within
24 hours*
UN1-11
Clinton Hanks
3.7
Require incorporation within.
24 hours*
UN 1-13
Clinton Hanks
3.0
Delete Southern tip of site+
UN 1-15
Clinton Hanks
1.7
Delete Southern tip of site+
UN1-18
Clinton Hanks
6.3
Delete Southwestern tip of
site+
UN I -21
Clinton Hanks
6.7
Delete Southern tip of site+
UN1-29
Clinton Hanks
6.5
Delete Southern tip of site+
UN2-1
Charles O'Bryant
10.6
Require additional buffer on
SW corner due to slope and
water quality concerns
UN2-2
Charles O'Bryant
6.1
Require additional buffer next
to creek due to slope
UN4-3
William Dick
3.9
Require an exclusion of the
lower elevations in the field
due to slope
Total 234.4 acres usable
1 - Application Area excludes buffer areas.
* - Until a more stable & uniform vegetative cover is established.
+ - Questionable moderate slope and/or nearness to surface water during rainfall.
Proposed Field No. UN1-4 is deleted from this program due to wet conditions. No sludge
is allowed to be land applied on this site.
9

Proposed Field No. UN4-2, owned by William Dick is not approved because bedrock is
less than one (1) foot below land surface.
All other proposed sites not mentioned above are suitable to receive residual solids at
agronomic rates with no seasonal restrictions, providrd that the seasonal high water table is
three feet or morc below lamd 5u-r-fAce, or as otherwise directed by conditions in this
permit.
There are several manmade waterways through these fields which will require upslope and
downslope buffers as required by condition 1.8 of this permit.
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 revoke 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_
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.
12. Issuance of this permit hereby voids Permit No. WQ0006594 issued March 19, 1993.
Permit issued this the 28th day of June, 1993
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Lo' Tjc, C'2�/La
A. Preston oward, Jr., E., Director / I
Division of nvironnmen Management
By Authority of the Environmental Management Commission
Permit No. WQ0006594
10

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WILLIAM DICK
UN4-1-3 !+ �. 5
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RATING SCALE fOR CLASSIFICATION OF FACILITIES
Name of Plant: Q
Owner or Contact Person: o
Mailing Address: -o. C 27oss'
County: Rcfc ki',ta A am Telephone:
NPDES Permit No. NCflD- Nondisc. Per. No."OaO
lssueDate: 1,hc Expiration Date: dgsacct
Existing Facility New Facility
Rated By: Ye ar Date: oG A z
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC
Grade
.Plant Class: (circle one)
11 III iV Total Paints—L0
11TEM POINTS
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(1)
industrial Pretreatment Units and/or
(!)Aeration - High Purity Oxygen System .....
20
Industrial Pretreatment Program
Diffused Air System . _ .........
10
(see definition No. 33)
4
Mechanical Air System (fixed,
(2)
i N FLOW OF PLANT IN GPD
floating or rotor) ......... . ... .
B
(not applicable to non -con laminated cooling waters, sludge
Separate Sludge Reaeration .....
3
handling facilities for water purification plants, totally
(il) Trickling Filter
closed cycle systems (def. No. 11). and facilities
High Rate ...................
7
consisting only of Item (4) (d) or items (4) (d) and 01) (d))
Standard Rate ...............
5
0 -- 20,ODO ..........................
1
Packed Tower ...............
5
20,001 .- 50.000..........................
2
(if!) Biological Aerated Filter or Aerated
50,OD1 -- 100,000 ..........................
3
Biol0giical Filter ......................
10
100,001 -- 250,001) ..........................
4
(iv) Aerated Lagoons ..................... .
10
250,001 - 500,000..........................
5
500,001--1,OD0,000 ..........................
a
(v) Rotating Biological Contactors ..........
10
1,000,0D1 -- 2,000.000 ......... ... ........
10
2,000.001 (and up) - rate i point additional for each
(vi) Sand Filters-
200,000 gpd capacity up to a
intermitlent biological .....
2
maximum of 30
recirculating biological .....
3
Design Flow (gpd) .
(vu) Stabilization Lagoons ...................
5
(3)
PRELIMINARY UNITS (see definition no. 32)
(viii)Claririer ........... ......... .......
5
(a) Bar Screens ................................
1
(ix) Single stage system for combined
or
carbonaceous removal of SOD and
(b) Mechanical Screens, Sialic Screens or
nitrogenous removal by nitrification
Cominuling Devices ........................
2
(see del. No. 12) (Points for this Item
(c) Grit Removal ...............................
1
have to be in addition to items (5) (a)
or
(i) through (5) (a) (viu) .... ......
6
(d) Mechanical or Aerated Grit Removal ...........
2
(x) Nulriernt addilions to enhance SOD
(e) Flow Measuring Device .......................
1
removal ...............................
5
or
(xi) Biological Culture ('Super Bugs') addition
(f) Instrumented Flow Measurement ..............
2
to enhance organic compound removal .....
5
0) Preaeration................................
2
(b) Nitrogenous Stage
(i) Aeration - High Purity Oxygen System .....
20
(h) influent FIDw•Equalization .. ............
2
Diffused Air System ..........
10
(i) Grease or Oil Separalors - Gravity ..........
2
Mechanical Air System (fixed,
Mechanical ..........
3
floating, or rotor) .... .....
8
Dissolved Air Flotation.
B
Separate Sludge Reaeration .....
3
Prechlorination .................. :...........
5
(I!) Trickling Filter -
High Rate ..............
7
(4)
PRIMARY TREATMENT UNITS
Standard Rate ............
5
(a) Septic Tank (see definition no. 43) ..............
2
Packed Tower ............
5
(b) Imhoff Tank ..................................
5
(iii) Biological Aerated Filter or Aerated
(c) Primary Clarifiers .............. .... ...
5
Biological Filler .........................
10
(d) Seliling Ponds or Settling Tanks for Inorganic
(Iv) Rolaling Biological Contactors ............
10
Nontoxic Materials {sludge handling facilities
(v) Sand Filter -
for water purification plants, sand, gravel,
intermittent biological ........
2
stone, and other mining operations except
recirculating biological ........
3
recreational activities such as gem or gold
(vi) Clarifier ................................
5
mirlvV)......................................
2

(61 TERTIARY OR ADVANCED TREATMENT UNIT
(10) 4-,HEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(a) Activated Carbons Beds -
(not applicable to chemical additions rated as item
without carbon regeneration .................. 5
(3) U), () (a) (xi), (fi) (a), (6) (b).ac n) (e),
with carbon regeneration ............. - - ' 1 5
{4} (a), (9) (b), or (9) (c) 5 points each:: List:
(b) Powdered or Granular Activated Carbon Feed -
5
without carbon regeneration ................. 5
5
with carbon regeneration .................... is
5
(c) Air Stripping ......................... . ... 5
5
(d) penivification Process (separate process).. .... 10
...
(e) Eleclrodialysis ........ _ ................... . 5
(11) MISCELLANEOUS UNITS
(f) Foam Separation ............................. 5
(a) holding Ponds. Holding Tanks or Settling Ponds
(g) {on Exchange ........................... . .. . . 5
for Organic or Toxic Materials including wastes
(h) Land Application of Treated Effluent
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 waslewater ... _..... 4
operations)
(b) Effluent Flow Equalization (not applicable to storage
(Ji on agricirtlura[ly managed sites (See del,
basins which are inherent in land application systems). 2
No. 4)................................... 10
(c) Stage Discharge (not applicable to storage basins
(ii) by high rate infiltration on non agriculturally
inherent in land application systems..-_.....- _ ...._ ,. _.... 5
managed silts (includes rotary distributors
(d) Pumps— 3
and similar fixed nozzle systems) ........... 4
(e) Stand -ay Power Supply ..^ 3
(W) by subsurface disposal (ncludes low pressure
(f) Thermal Pollution Control Revrce _ T. ..._. .. 3
pipe syslerns and gravity systems except at
plants consisting of septic lank and nitrifica-
tion fines only) ............................. 4
TOTAL POINTS %U
{i) Microscreens ..... ..•....................... 5
{1) Phosphorus Remo+albyBiological Processes
CLASSIFICATION
(See def. No. 26) ............................ 20
(k) PoIishing Ponds - without aeration .. _ .... 2
lass I 5 - 25 Points
with aeration .......... 5
s Ib _ 26- 50 Points
(1) Post Aeration - cascade .............. 0
Class 11151- 65 Points
diffused or mechanical ... 5
OL S51V 66- Up Points
(m) Reverse Osmosis ............................... 5
(n) Sand or Mixed -Media Filters - low race ........... 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 ......... 15
Facilities having an activated sludge process will be assigned
a minimum classification of Class It.
} SLUDGE TREATMENT
Facilities having treatment processes for the removal of metal
(a) Sludge Digestion 'tank - Heated...............
10 or cyanide will be assigned a minimum classification of Class It.
Aerobic ...............
5
Unheated ...... .......
3 Facilities having treatment processes for the biological removal
5
(b) Sludge Stabilization (chemical or thermal) . - .....
of phosphorus will be assigned a minimum classification of Class
(e) Sludge Drying Beds - Gravity ................
2 111.
Vacuum Assisted .......
5
(d) Sludge Elutrialion .............................
5 In•planl 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 Thid ener (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 applinble to a unit rates as (3) (i) .........
B rating.
(h) Sludge Gas Utilization (including gas storage) . - - -
2
() Sludge Holding Tank - Aerated... ...........
5 4Qp1TIONAL COMMENTSi
Norraerated ............
2
O) Sludge Incinerator - (not including activated
carbon regeneration) . - ...
110
(k) Vacuum Filter, Cenirifuge or Filler Press or other
similar dewatering devices ....................
10
(e) SLUDGE DISPOSAL (including incinerated ash)
(a) Lagoons ..... ..................................
2
(b) Land Application (surface and subsurface)
(see derinilion 228)
-where the facility holds the land app. permit ...
0
-by contr2cling to a [arid applicalion operator who
holds the land application permit ................
2
-land application of sludge by a contractor who does
not hold the permit for the wastewaler treatment
facility where the sludge is generated .........
10
(c) Landiilled (burial) ............................
5
[9) DISINFECTION
(a) Chlorinalion.............................
5
(b) Dechlorination ........................
5
(c) Ozone ..............................
5
(d) Radiation ..........................
5