WQ0003781_Final Permit_19910308

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 2761
James G. Martin, Governor
William W. Cobey, Jr., Secretary
March 8, 1991
Mr. Wadie D. Lewis, Jr.,
Director of Water Resources
Greenville Utilities Commission
Post Office Box 1847
Greenville, North Carolina 27835
George T. Everett, Ph.D.
Director
Subject: Permit No. WQ0003781
Greenville Utilities Commission
Land Application of Sludge
Pitt County
Dear Mr. Lewis:
In accordance with your application received June 27, 1990, we are forwarding herewith
Permit No. WQ0003781, dated March 8, 1991, to Greenville Utilities Commission for the
operation of a land application of sludge program. In reference to your request to reduce the thirty
(30) day waiting period before grazing livestock can be allowed on sludge applied land, the Code
of Federal Regulations, 40 CFR Chapter 1 (7-1-89 Edition), section 257.3-6 concerns disease
control and states "...and grazing by animals whose products are consumed by humans is
prevented for at least one month." This is an EPA requirement and is interpreted such that the
thirty day waiting requirement must be maintained.
This permit shall be effective from the date of issuance until February 28, 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.
Issuance of this permit hereby voids Permit No. 7150-R2 issued December 13, 1985, and all of
its related permit amendments. In addition, this permit excludes the Davenport Farm and the
Greenville Water Plant Sites. No sludge is.authorized for land application on these sites.
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. Box 11666, Raleigh, NC 27604. Unless such demands are made
this permit shall be final and binding.
Pollution Prevention ,Pays
P.O. Box 27687, Raleigh, North Caxolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

*I,
If you need additional information concerning this matter, please contact Mr, John
Seymour at 919/ 733-5083.
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cc: Pitt County Health Department
Piedmont Olsen
Washington Regional Office
Groundwater Section
Training and Certification

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
Greenville Utilities Commission
Pitt County
FOR THE
operation of a sludge land application program consisting of the land application of stabilized
sludge by spray irrigation of liquid sludge and land spreading of dried sludge from the Greenville
Municipal Wastewater Treatment Plant to lands owned by the Greenville Utilities Commission and
identified in condition VI.6 of this permit with no discharge of wastes to the surface waters,
pursuant to the application received June 27, 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 28, 1996, and shall be
subject to the following specified conditions and limitations:
PERFORMANCE STANDARDS
1. The Washington Regional Office, phone no. 919/ 946-6481, 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 to the new lands
so that an inspection can be made of the new 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 Pitt 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 applicJ006'n 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.
6. 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.
The following buffers zones shall be maintained:
a) 400 feet from residences 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.
b) 200 feet from residences 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.
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,
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 11) prior to
application or incorporation. An evaluation of all sludges as specified in condition
114 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.
12. No sludge at any time shall be stored at any application site.
11. OPERATION AND MAINTENANCE REQUIREMENTS
The facilities and disposal sites shall be properly maintained and operated at all
times.
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A suitable vegetative cover as listed in condition II 34,R-kall be maintained in
accordance with the crop management plan approved by this Division.
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11
RI
The application rates shall not exceed the following for the specified crops:
CrQ PAN (lbs/acre car)
Wheat (small grain)
100
Barley (small grain)
100
Milo (small grain)
100
Oats (small grain)
100
Soybeans
150
Corn (silage and grain)
200
Alfalfa
250
Sorghum
120
Sudex (silage)
200
Sudex (hay)
160
Fescue grass
250
Timothy grass
200
Orchard grass
200
Rye grass
200
Blue grass
220
Coastal Bermuda grass
350
Cotton
100
Forest areas (hard and soft woods)
75
No sludges other than the following are hereby approved for land application in
accordance with this permit:
Permit
Source -County Number
Greenville Pitt NC0023931
Municipal
Wastewater
Treatment
Plant
Estimated
Volume (dry ty ons/year)
1,423.5
The lifetime heavy metal loadings shall not exceed the following for the
corresponding Cation Exchange Capacities (CEC):
Parameter CEC < 5
Lead (lbs/acre) 500
Zinc (lbs/acre) 250
Copper (lbs/acre) 125
Nickel (lbs/acre) 125
Cadmium (lbs/acre) 4.5
6. Upon classification of the facility by the Certification Commission, the Permittee
shall employ a certified waster treatment plant operator to be in responsible charge
of the wastewater treatment facilities. The operator must hold a certificate of the
type and grade at least equivalent to the classification assigned to the wastewater
treatment facilities by the Certification Commission.
7. Adequate procedures shall be ,provided to prevent surface runoff from carrying any
disposed or stored sludge material into any surface waters.
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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.
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) 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 tons/acre
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), anntial pounds/acre of plant available
nitrogen (PAN), and annual pounds/acre of phosphorus applied to each field.
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3. A representative annual soils analysis (Sta*jcd 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 rriinimum 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
Nickel
Lead
Cadmium
Zinc
Copper
PH
Calcium
4. A quarterly sludge analysis and annual Toxicity Characteristics Leaching Procedure
(TCLP) analysis shall be conducted by the Permittee and the results maintained Oil
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
Methoxychlor
Methyl ethyl ketone
Nitrobenzene
Pentachlorophenol
Pyridine
Selenium
Silver
Tetrachloroethylene
Toxaphene
Trichioroethylene
2,4,5-Trichlorophenol
2,4,6-Trichlorophenol
2,4,5-TP (Silvex)
Vinyl chloride
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5. Three copies cPA monitoring and reporting requirements as specified in conditions
1111, III 2, III 3 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 27687
Raleigh, NC 27611-7687
6. Noncompliance Notification:
The Permittee shall report by telephone to the Washington, Regional Office
telephone no. 9191 946-6481, 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.
1V. GROUNDWATER REQUIREMENTS
1. Prior to beginning waste disposal operations, three (3) monitor wells, one (1)
upgradient and two (2) downgradient, shall be installed on the Worthington Tract
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. However, the exact location and construction
details for these wells shall be approved by the Washington Regional Office, from
which a well construction permit must be obtained.

�. 2. The new monitor wells shall be sampled initially after construction. The new wells,
and the six (6) existing monitor wells on the original 260 acre tract shall be sampled
every April, August and December for the following parameters:
NO3 (10.0) Ammonia Nitrogen
TDS (500.0) TOC
pH (6.5-8.5 standard Units) Water Level
Chloride (250.0) Fecal Colifornls
Zinc (5.0) Copper (1.0)
Volatile Organic Compounds - (In December Only by Method 1 of 2 below)
Method 1: Method 6230D (Capillary - Column), "Standard Methods For The
Examination of Water and Wastewater", 17th ed., 1989.
Method 2: Method 502.2 "Methods For The Determination of Organic Compounds
in Drinking Water", U.S. EPA - 600/4-88/039.
The measurement of water level must be made prior to sampling for the remaining
parameters.
The measuring points (top of well casing) of all monitoring wells shall be
surveyed to provide relative elevations of the measuring point for each of the
monitoring wells. The depth of the water in each well shall be measured from the
surveyed point on the top of the casing.
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 specified, the
units for these concentrations are expressed as milligrams per liter,
If any volatile organic compounds are detected by method 6230D, or the equivalent
method 502.2, then EPA methods 604 and 611 must also be run to detect other
organic compounds which may be present. The results of all analyses specified in
the monitoring requirements, including 604 and 611 if required, must be
submitted simultaneously.
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 background 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.
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.
3. The Compliance Boundary for the disposal system is specified by regulations in 15
NC AC 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 the location of the Compliance Boundary.
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For facilities peAKed on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the perimeter of the waste disposal 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 Permittee shall notify the DEM Director within 14 days.
The Director shall then establish a modified Compliance Boundary which will be
done as a modification to the Permit.
The REVIEW BOUNDARY 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, (h)
submit a plan for the alteration of existing site conditions, facility design or
operational controls that will prevent a violation of standards at the Compliance
Boundary, and implement that plan upon its approval by the Director.
4. Any additional groundwater quality monitoring as deemed necessary by the
Division of Environmental Management shall be provided.
V. INSPECTIONS_
1. 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.
V1. GENERAL CONDITIONS
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.

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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. Prior to any transfer of this land, a notice shall be given to the new owner that gives
full details of the materials applied or incorporated at this site.
5. This permit shall become voidable unless the agreements between the Pern-ittee and
the landowners/lessees are in full force and effect.
6. The following are approved sites for sludge application (see attached map):
Site No. Owner[Lessee Application Area excluding buffers)
acres
Worthington G.U.C. 138
The land application site designated as Worthington tract is partially covered in soils
having a seasonal high water table of 2.5 feet below land surface. Therefore, no
sludge shall be applied to the southern half of this field during the period from
November through April, inclusive.
7. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to an enforcement action by the Division of Environmental
Management in accordance with North Carolina General Statute 143-215.6.
8. 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 211.0205 (c)(4).
9. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
10. A set of approved documents for the subject project must be retained by the
applicant for the life of the permit.
11. 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.
12. 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.

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13. Issuance of this permit hereby voids Permit No. 7150-R2 issued December 13,
1985, and all of its related permit amendments.
Permit issued this the 8th day of March, 1991
NORTH. CAROLI NA ENVI>'tONMENTAL MANAGEMENT COMMIS SION
George T. Everett, irector
Division of Environ a ment
By Authority of the Environmental Management Commission
Permit No. WQ0003781

(MISCELLANEOUS UNITS CONTINUED) POINTS
(c) Holding Pond for Effluent Flour Equalization and/or
Stage Discharge . . . . . . . . . . . . . . . 5
(4) Effluent Pumps . . . . . 3
(e) In -Plant Pumps (including air lifts). . . . . . . . 2
(f) Stand-8y Power Supply . . . . . . 3
(g) Thermal Pollution Control Device 3
(h) Treatment Processes for Removal of Metal or Cyanide and
other Toxic Materials . . . . .. . . . . . . . . . . 30
Total Points /G
CLASSIFICATION
lass I 5 - 25 Points
Class 11 . . . . . . . . . . . . . . . 25 - 50 Points
Class III . . . . . . . . . . . . . . . 51 - 65 Points
Class IV . . . . . . . . . . . . . . . 66 - Up Points
Facilities having a rating of one through four points, inclusive,
do not require a certified operator. Classification of all other
facilities requires a comparable grade operator in responsible charge.
-4-
North Carolina
Division of Envirannental Management
Checklist of Facility Components
To be Used In Determing Facility Classification
All information will be printed
Name of Plant Cytcmyiff' Lei f rll ffPS
County
Owner or Contact Persons �[r1/� G f W/ts i✓.
Te�ep one
Malling Address _As:_ sx__151/% L7VrrHvil%t z7Tf�S
Street ar Box Ito. Town or City ZIP
Permit Number Information
Construction Status
NPDES Permit No. Please Check:
Existing Facility _
Date Issued Upgraded Facility
New Facility
State Permit No. il)/ CCC ?,f If Upgraded or New Facility, Give:
50% Completion Date
A Date Issued m -C A � l IDOS Completion Date
Rated by S tyMcipt/F Regional Office (.tee n�vn t' Pate a /
Operator in Responsible Charge Grade _
Design Flow of Plant in GPD Plant Class X
ITEM POINTS
(1) PREIRLAIMLNT UNITS (sec deflnition No. 34) . . . . . . _ . 2
(2) DESIGN FLOW OF PLANT IN GPO (not applicable to non -
contaminated cooling waters and non -discharging systems
a 20,000 . . . . . . . . . . . . . . . . I
20,001 -- 50,000 . . . . . . . . . . . . . . . . . . 2
50.001 -- 100.000 .. . . . . . . .. . .. ..... 3
100,001 250,000 . . . . . . . . . . . . . . . . . . 4
250,001 -- 6GO,000 . . . _ . . . . . . . . . . . . . . 5
509.001 - 11000,000 . . . . . . . . . . . . . . . . 8
1,000.001 -- 21000,000 10
2,000,001 (and up) - rate 1 point additional for each 200,D00
GPD capacity up to a maximum of 30
Design Flow (GPD);
(3) PRELIMINARY UNITS (see definition No. 3 . . . . . . . ..
(a) Influent Pumps (including air lift) . . . . . . . . . 3
(b) Bar Screens . . . . . . . . . . . . . . . . . . . . I
or
(c) Mechanical Screens, Static Screens or Comminuting
Devices . . . . . . . . . . . . . . . . . . . . 2
(d) Grit Removal or . . . . . . . . . . . . . . . 1
(e) Mechanical or Aerated Grit Removal . . . . . . . . . 2
(f) Flow Measuring Device or . . . . . . . . . . . . . . 1
(g) Instrumented Flow Measurement . . . . . . . . . . . . 2
Effective
411187 -1-
t

g
(4)
(5)
(6)
Is
ITEM POINTS
(h)
Preaeration or Equalization . . . . . . . . . .
1
(i)
Grease or Oil Separators -- Gravity . . . . . .
2
Mechanical. . _ . _ _
3
Aerated . . . . . . . .
5
(j)
Chemical Conditioning . . . . . . . . . . . . . . .
5
PRIMARY TREATMENT U81TS
(a)
Septic Tank (see definition No. 44) _
2
(b)
Imhoff 'rank . . . . . . . . . . . . . . . . . .
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 otlier mining operation;
except recreational activities such as gem or gold
mining). . . . . . . . . . . . . . . . . ..
10
SECONDARY TREATMENT UNITS
(a)
Carbonaceous Stage
(i) Aeration - High Purity Oxygen System . _ . .
20
Diffused Air System . .
10
Mechanical Air System (fixed, floating or rotor)
8
Separate Sludge Reaeration . _ . . . . . _ _
3
Trickling Filter - Iligh Ratr . . . . . . . .
7
Standard Rate . . . . . .
5
Packed Taxer
5
(iii) Aerated Lagoons _ . . . .
10
(iv) Rotating Biological Contactors (biodisc).
10
(v) Sand Filters (intermittent biological)
2
(vi Stabilization Lagoons
5
(vii; Clarifier (including sludge air lifts). _ . .
5
(b)
Nitrogenous Stage
(i) 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
.(iii)
Rotating Biological Contactors (blodisc) _ _
10
(iv) Sand Filter (intermittent biological). . . .
2
(v) 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)
Electradialysis . . . . . . . . . . . . . . . . .
5
(9)
Foam Separation . . . . . . . . . . . . . . . . .
5
(h)
ion Exchange . . . . . . . . . . . . . . . _
5
-2-
ITEM
POINTS
(1)
Land Application (see definition No. 23b)
5
(not applicable for facilities under 1O(a) .
( j )
Mi croscreens . . . . . . . . . . . . ... . . .
5
(k)
Phosphorus Removal . . . . . . . . . . .
20
(1)
Polishing Ponds- Without aeration . . . . . . . .
2
With aeration . . . . . . . . . .
5
(m)
Past Aeration - Cascade . . . . _
0
Diffused or Mechanical . . . .
5
(n)
Pre -Package Unit for Remmval of Oil and Grease
30
(o)
Reverse Osmosis . . . . . . . . . . . . . . ..
5
(p)
Sand or Mixed -Media Filters -- Low Rate . . . . . .
2
111gh Rate
5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank -- Heated . . . . . . . .
ID
Aerobic . . . . . . . . .
5
Unheated . . . .
3
(b)
Sludge Stabilization (chemical or thermal) . . . .
10
(c)
Sludge Drying Beds . . . . . . . . . . . . . . .
2
(d)
Sludge Elutriation . _ . . . . . .
5
(e)
Sludge Conditioner (chemical or thermal) _ . . . .
5
(f)
Sludge Thickener . . _ . _ . .
2
(9)
Sludge Gas Utilization (including gas storage). . .
2
(h)
5ludge Holding Tank -- Aerated . . . . . . . . . .
5
Non -aerated
2
(1)
Sludge Incinerator (not including activated carbon
regeneration) . . . . . . .
10
(j)
Vacuum Filter, Centrifuge or FiTter'Press . . . .
10
(8)
SLUDGE DISPOSAL (including incinerated ash)
(a)
Lagoons . . . . . . . . . . . . . . . .
2
(b)
Land Application (surface and subsurface) -(see def.
23a)
(c)
LandfilIed (burial) . . . . . . . . . . . . . . .
5
(9)
DISINFECTION
(a)
Pre
1
b)
Intermediate . . . . . . . . . . . . . . . . . .
2
(c)
Past . . . . . . . _ _ . . . . . .
3
(d)
Oechlorinatlon. . . . _ . . . . . . . . . . .
5
(e)
Chlorine or Ozone Generation . . . . . . . . . .
5
(f)
Radiation . . . . . . . . . . . . . . . . . .
3
(10)
MISCELLANEOUS UNITS
(a)
Holding Ponds or }ioiding Tanks for Inorganic, Hon -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
4
(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-

NORTH CAROLINA-
7 MINUTE SERIES (TOpOGRAPHIQ
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