WQ0003760_Final Permit_19910404

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
April 4, 1991
Mr. Arthur J. Toompas
Manager, Water and Air Resources
Cone Mills Corporation
1201 Maple Street
Greensboro, North Carolina 27405
Dear Mr. Toompas:
Subject: Permit No. WQ0003760
Cone Mills Corporation
Guilford County Farm Site
Spray Irrigation of Residuals
Guilford County
In accordance with your application received June 22, 1990, we are forwarding herewith
Permit No. WQ0003760, datApril 4, 1991, to Cone Mills Corporation for the disposal by spray
irrigation of wastewater treatment residuals.
This permit shall be effective from the date of issuance until February 29, 1996, 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.
Also, please note the required buffers delineated in condition I.4. Issuance of this permit hereby
voids Permit Number 4220-R2 issued December 30, 1985.
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.
One set of approval documents is being forwarded to you. If you need additional
information concerning this matter, please contact Mr. Dana Bolden at 919/ 733-5083,
Guilford County Health Department
Winston-Salem Regional Office
Groundwater Section
Training and Certification Unit
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Aff=ative Action Employer

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SPRAY IRRIGATION SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North
Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Cone Mills Corporation
Guilford County
FOR THE
continued operation of 0.1 MGD waste sludge land disposal facility consisting of two 3 MG
aerated holding lagoons, irrigation pumps, and approximately 591 acres of disposal area to serve
the Cone Mills Corporation with no discharge of wastes to the surface waters, pursuant to the
application received June 22, 1990 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 29, 1996, and shall
be subject to the following specified conditions and limitations:
1. The spray irrigation facilities shall be effectively maintained and operated at all times so
that there is no discharge to the surface waters, nor any contamination of ground waters
which will render them unsatisfactory for normal use. In the event that the facilities fail
to perform satisfactorily, including the creation of nuisance conditions or failure of the
irrigation area to adequately absorb the wastewater, the Permittee shall take such
immediate corrective action to correct the problem, including actions as may be required
by the Division of Environmental Management.
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. Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited_
4. The following buffers shall be maintained:
a) 400 feet between wetted area and any residence under separate ownership,
b) 150 feet between wetted area and property lines,
c) 100 feet between wetted area and wells,
d) 100 feet between wetted area and drainageways or surface water bodies,
e) 50 feet between wetted area and public right of ways,

f) 100 feet between wastewater treatment units and wells,
g) 50 feet between wastewater treatment units and property lines.
h) 10 feet from upslope interceptor drains and surface water diversions,
i) 25 feet from downslope interceptor drains, surface water diversions, groundwater
drainage systems and surface drainage ditches.
5. 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.
6. 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.
7. No crops for direct human consumption shall be raised on these sites for a period of 18
months following sludge application.
8. . Maximum slope for liquid sludge application shall be 6% for unless terraces are
constructed to prevent runoff.
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 H 4 must be
conducted as to their ability to demonstrate compliance with this requirement. A copy of
this report must be submitted to the Assistant Chief for Operations, Division of
Environmental Management, Water Quality Section, Operations Branch, PO Box 27687,
Raleigh, NC 27611-7687, within six (6) months of the permit issue date.
11. Specific sludge application area boundaries shall be clearly marked on each site prior to
and during sludge application.
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge 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. Once the facility is classified, the Permittee must submit a
letter to the Certification Commission which designates the operator in responsible
charge.
3. A suitable vegetative cover shall be maintained.
4. Irrigation shall not be performed during inclement weather or when the ground is in a
condition that will cause runoff.
5. Adequate measures shall be taken to prevent wastewater runoff from the spray field.
6. The facilities shall be effectively maintained and operated as a non -discharge system to
prevent the discharge of any wastewater resulting from the operation of this facility.
2

7. The application rate shall not exceed: a) 1 inch per hour on cultivated crop land, b) or
0.75 inch per hour on forage/pasture land, and c) 1 inch per acre per week on all sites_
8. No type of waste other than that from Cone Mill Corporation shall be sprayed onto the
irrigation area.
9. No traffic or equipment shall be allowed on the disposal area except while installation
occurs or while normal maintenance is being performed.
10. Public access to the land application sites shall be controlled during active site use. Such
controls may include the posting of signs showing the activities being conducted at each
site.
11. The lifetime heavy metal loadings shall not exceed the following for the
corresponding Cation Exchange Capacities (CEC):
Parameter
CEC < 5
CEC 5-15
CEC > 15
Lead (lbs/acre)
500
1000
2000
Zinc (lbs/acre)
250
500
1000
Copper (lbs/acre)
125
250
500
Nickel (lbs/acre)
125
250
500
Cadmium (lbs/acre)
4.5
9
18
12. Adequate procedures shall be provided to prevent surface runoff from carrying any
disposed or stored sludge material into any surface waters.
13. 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.
14. Surface applied sludge will be plowed or disced within twenty-four (24) hours after
application on lands with no cover crop established.
15. 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.
16. 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.
17. 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.
1 S. 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.
19. 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.
20. A compacted clay liner of at least four to six inches in thickness shall be maintained over
the protruding rock formation on the sides and bottom of the holding basins.
K,

III. MONITORING AND REPORTING REQUIREMENTS
1. Any monitoring (including groundwater, surface water, soil or plant tissue
analyses) deemed necessary by the Division of Environmental Management to
insure surface and ground water protection will be established and an acceptable
sampling reporting schedule shall be followed.
2. Adequate records shall be maintained by the Penmittee tracking the amount of wastewater
disposed. These records shall include, but are not necessarily limited to the following
information:
a) date of irrigation,
b) volume of sludge applied in gallons/acre and dry tons/acre,
c) field irrigated,
d) length of time field is irrigated,
e) continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings
for each field,
f) weather conditions, and
g) soil conditions
h) type of crop or crop to be grown on field
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.
The digester shall be monitored once per month, prior to sludge removal, during any
calender month that sludge is removed for transport to the Guilford County Farm. The
analysis shall include, but is not limited to, the following parameters:
Ammonia Zinc
Total Kjeldhal Nitrogen Copper
Phosphorus Nickel
Cadmium
Suspended Solids - analysis three times per week when sludge is
withdrawn
4. Each time land application is preformed, the source lagoon shall be monitored for the
following parameters:
Total Kjeldhal Nitrogen Zinc
Nitrite
Copper
Nitrate
Nickel
Phosphorus
Cadmium
pH
Chromium
5. 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 Pernuttee for a minimum of five years. A representative sample from each lagoon
shall be collected and analyzed. Samples from the two lagoons shall not be intermixed.
If land application occurs at a frequency less than quarterly, sludge analysis will be
required for each instance of land application.
The sludge analysis may, if appropriate, be conducted in conjunction with one of the
required lagoon monitoring events required above and shall include, but is not
necessarily limited to, the following parameters:
M

% 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
Methoxychlor
Methyl ethyl ketone
Nitrobenzene
Pentachlorophenol
Pyridine
Selenium
Silver
Tetrachloroethylene
Toxaphene
Trichloroethylene
2,4,5-Trichlorophe nol
2,4,6-Trichlorophenol
2,4,5-TP (Silvex)
Vinyl chloride
6. 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 Perrnittee 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
Lead
Zinc
pH
Manganese
Cation Exchange Capacity
Sodium
Nickel
Cadmium
Copper
Calcium
Surface waters shall be monitored for three months following an application of sludge.
Samples shall be collected once per month at such a time that runoff is not a factor and
once per month following a significant runoff causing rainfall event. Quarterly samples
shall be analyzed for the following parameters:
Total Kjeldhal Nitrogen Zinc
Nitrite
Copper
Nitrate
Nickel
Phosphorus
Cadmium
pH
Chromium
5

Three copies of all monitoring and reporting requirements as specified in conditions III
1, 111 2, III 3, III 4, III 5, III 6, and III 7 shall be submitted annually on or before
March I of the following year to the following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 27687
Raleigh, NC 27611-7687
9. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem 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
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.
t ',1,1',w �_ f t
Within 90 days of permit issuance, four (4) monitor wells, one (1) upgradient and
three (3) downgradient, shall be installed to monitor groundwater quality. The
well(s) shall be constructed such that the water level in the well is never above or
below the screened (open) portion of the well at any time during the year. The wells
shall be constructed generally in the locations shown on the attached site map,
however, the exact location and construction details for these wells shall be approved
by the Winston-Salem Regional Office, from which a well construction permit must
be obtained.
2. The monitor wells must be sampled initially after construction and thereafter every
April, August, and December for the following parameters:
NO3 (10.0) TDS (500.0)
TOC pH ( 6.5-8.5 standard units)
Ammonia Nitrogen Chlorides (250.0)
Water Level Total Coliforms (1/100 ml)
6

Total Suspended Solids NO2 (10.0)
Cadmium (0.005) Nickel (0.15)
SO4 (250.0) Fecal Coliforms
Zinc
Volatile Organic Compounds - In December only ( by Method 1 or Method
2 below)
Method 1: Method 6230D ( Capillary - Column), "Standard Methods for
the Examination of Water and Wastewater", 17th edition, 1989
Method 2: Method 502.2 " Methods for the Determination of Organic
Compounds in Drinking Water", United States Environmental
Protection Agency - 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 relative to mean sea level (M.S.L.). The depth of the water in each well
shall be measured from the surveyed point on the top of the casing. The water level
elevations shall then be determined relative to mean sea level (M.S.L.).
The numbers in parentheses represent the maximum allowable concentrations in
groundwater for the various analytical parameters, as specified in 15 NCAC 2L
[Groundwater Classifications and Standards]. Unless otherwise noted, the
concentrations are given in parts per million.
If TOC concentrations greater than 10 mg/l are detected in any downgradient
monitoring well, additional sampling and analysis must be conducted to identify
the individual constituents comprising this TOC concentration. If the TOC
concentration as measured in the backgiound monitor well exceeds 10 mg/l, this
concentration will be taken to represent the naturally occurring TOC concentration.
Any exceedances of this naturally occurring TOC concentration in the downgradient
wells shall be subject to the additional sampling and analysis as described above.
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 analysis 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 May, September, and January.
2. The Compliance Boundary delineated on the attached site plan for the disposal
system is specified by regulations in 15 NCAC 2L, Classifications and Water
Quality Standards applicable to the groundwater of North Carolina. 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 prior to December 30, 1983, the Compliance Boundary is
established at the lesser of 500 feet from the waste disposal area or the property
boundary, whichever is less.
7

If the title to any property which may affect the location of the Compliance Boundary
is changed, the permittee 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 delineated on the attached site map 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.
3, No land application of waste activities shall be under taken when the seasonal high
water table is less than three (3) feet below land surface.
4. Any additional groundwater quality monitoring, as deemed necessary by the
Division, shall be provided.
1. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
2. The Permittee or his designee shall inspect the 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.
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.
1. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data_
2. 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.
XF

3. This permit is effective only with respect to the nature and volume of wastes
described in the application and other supporting data.
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 approved map):
Site No.
Owner/Lessee
Application Area (excluding buffers)
[acres]
1
Guilford County Farm
30
2
Guilford County Farm
18
3
Guilford County Farm
52
4A & 4B
Guilford County Farm
51
5
Guilford County Farm
35
6
Guilford County Farm
20
7A & 7B
Guilford County Farm
10
8
Guilford County Farm
12
11
Guilford County Farm
6
12A & 12B
Guilford County Farm
22
13
Guilford County Farm
3
14A & 14B
Guilford County Farm
8
15A & 15B
Guilford County Farm
36
16
Guilford County Farm
17
17
Guilford County Farm
6
18A & 18B
Guilford County Farm
21
19
Guilford County Farm
15
20
Guilford County Farm
15
21
Guilford County Farm
12
22
Guilford County Farm
30
23
Guilford County Farm
10
24
Guilford County Farm
17
25 - 29
Guilford County Farm
49
30
Guilford County Farm
14
31
Guilford County Farm
2
32
Guilford County Farm
56
33
Guilford County Farm
2
34
Guilford County Farm
5
35
Guilford County Farm
7
36
Guilford County Farm
10
Total 591
Sites 9 and 10 are not approved for application of sludge by Cone Mills Corporation
sludge. They are utilized for hog production and domestic waste sludge application by
the Guilford County Farm.
6. Over the road tankers or transport vehicles shall not be utilized to apply sludge. Only the
permitted spray system or vehicles approved by the Division's Winston-Salem Regional
Office shall be utilized application.
7. A set of approved documents for the subject project must be retained by the applicant for
the life of the permit.
8. 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.
9

9. This permit is not transferable. In the event there is a desire for the facilities to change
ownership, or there is a name change of the Permittee, a formal permit request must be
submitted to the Division of Environmental Management accompanied by an application
fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or
may not be approved.
10. 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.
11. 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.
12. Prior to any transfer of this land, a notice shall be given to the new owner that gives full
details of the materials applied at this site.
13. The annual administering and compliance fee must be paid by the Permittm within thirty
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).
14. The Permittee, at Ieast 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.
15. Issuance of this permit hereby voids Permit Number 4220-R2 issued December 30,
1985.
Permit issued this the 4th day of April, 1991
CAROLINA
forge T. E er€
Division of E
By Authority of
Permit Number WQ0003760
AL MANAGEMENT COMMISSION
Management Commission
10

�9 <S
03
--
Cie
N
131
.; C3
i
e
3
11

(4)
(5)
(6)
ITEM
POINTS
Preaeration or Equalization . . . . . . . . . .
1
i
Grease or Oil Separators -- Gravity
2
Mechanical. . . . . . .
3
Aerated . . . . . . . .
5
(j)
Chemical Conditioning . . . . . . . . . . . . . . .
5
PRIMARY
TREATMENT UNITS
(a)
Septic Tank (see definition No. 44) . . . .
2
b)
Imhoff Tank . . . . . . . . . . . . . . .
3
c)
Primary Clarifiers (including sludge air lifts) . .
5
d)
Settling Ponds or Settling Tanks for inorganic Non -
Toxic Materials Involving a Discharge to the Surface
waters (sand, gravel, stone, and other mining operations
except recreational activities such as gem or gold
mini ng) . . . . . . . . . . . . . . . ..
10
SECONDARY TREATMENT UNITS
(a)
Carbonaceous Stage
(i) Aeration - High Purity Oxygen System . . . .
20
Diffused Air System . . .
10
Mechanical Air System (fixed, floating ar rotor)
8
Separate Sludge Reaeration . . . . . . . . .
3
(ti} Trickling Filter - High Rate . . . . . . . .
7
Standard Rate . . . . . .
5
Packed Toner . . . . . . .
5
(III) Aerated Lagoons . . . . .
10
(iY) Rotating Biological Contactors (biodisc). . .
10
(v) Sand Filters (intermittent biological) . . .
2
(v1) Stabilization Lagoons
5
{vii Clarifier (including sludge air lifts), . . .
5
(b)
Nitrogenous Stage
(1) Aeration - High Purity Oxygen System.
20
Diffused Air Systems. . . . _
10
Mechanical Air System (fixed, floating, or rotor)8
Separate Sludge Reaeration . . . . . . . . .
3
(ii) Trickling Filter - High Rate . . . . . . . .
7
Standard Rate . . . . . .
5
Packed Tower_ . . . .
5
(Ili) Rotating Biological Contactors (biodisc) . .
10
(Iv) Sand Filter (intermittent biological). . . .
2
(Y) Clarifier (including sludge air lifts) . . .
5
TERTIARY OR ADVANCED TREATMENT UNITS
(a)
Activated Carbon Beds - Without Carbon regeneration
5
With Carbon regeneration.
15
(b)
Powdered or Granular Activated Carbon Feed - Without
Carbon regeneration
5
With Carbon regeneration.
15
(c)
Ammonia Stripping . . . . . . . . . . . . . . . .
18
(d)
Chemical Additions . . .
5
(e)
Oenitrification Process (separate process).
10
(f)
Electrodialysis . . . . . . . . . _ . . . . . . .
5
(g)
Foam Separation . . . . . . . . . . . . . . . . .
5
(h)
Ion Exchange . . . . . . . . . . . . . . . . . . .
5
ITEM
POINTS
(i)
Land Application (see definition No. 23b)
5
(not applicable for facilities under 10(a) ,
(i)
Microscreens . . . . . . . . . . . . ... . . .
5
(k)
Phosphorus Removal . . . . . . . . . . _
20
(1)
Polishing Ponds- Without aeration . . . . . . . .
2
With aeration . . . . . . . . . .
5
(m)
Post Aeration - Cascade . . . . . . .
0
Diffused or Mechanical . . .
5
(n)
Pre -Package Unit for Removal of Oil and Grease . .
30
a)
Reverse Osmosis
5
(p)
Sand or Mixed -Media Filters — Low Rate . . . . ..
2
High Rate ..
5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank -- Heated . . . . . . . .
10
Aerobic . . . . . . . . .
5
Unheated . . . . . .
3
Sludge Stabilization (chemical or thermal) . . . .
10
1b)
c)
Sludge Drying Beds . . . . . . . . . . . . . . . .
2
Sludge Elutriation . . . . . . . . . . . .
5
�d)
e)
Sludge Conditioner (chemical or thermal) . . . . .
5
f)
Sludge Thickener . . . . . . . . . . . . . .
2
Sludge Gas Utilization (including gas storage). . .
2
�g)
h}
Sludge Holding Tank -- Aerated . . . . . . . .
5
Non -aerated
2
(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 subsurface),(see def.
(c)
Landfilled (burial) . . . . . . . . . . . . . . .
5
(9)
DISINFECTION
Pre .......................
i
N
Intermediate . . . . . . . . . . . . . . . . . .
2
Post
3
N.
Oechlorination. . . . . . . .
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 to 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
(Any pump, 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
operator),
-3-
-2-