WQ0000956_Final Permit_19930329

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
Jonathan B. Howes, Secretary
March 29, 1993
Mr. Kent Scott, ORC
City of Mount Airy
Post Office Box 70
Mount Airy, North Carolina 27030
Subject: Permit No. WQ0000956
City of Mount Airy
Land Application of Sludge
Surry County
Dear Mr. Scott:
In accordance with your application received February 3, 1992, we are forwarding herewith Permit
No. WQ0000956 dated March 29, 1993, to City of Mount Airy for the operation of a land application of
sludge program. Please note that this permit renewal removes several land application sites that were part
of previous permits, per the City of Mount Airy's request.
This permit shall be effective from the date of issuance until February 28, 1998, 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. WQ0000956 issued April 9, 1991.
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 150E 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
7041251-6208 9191486-1541 704/663-1699 9191571-4700 9191946-6481 9191395-3900 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 contactzlY*. John Seymour at 919/
733-5083.
Sincerely,
L Ceti
A. Prest r Howard, Jr., P.E. �
Director
cc: Surry County Health Department
Winston-Salem Regional Office, Water Quality Section
Winston-Salem Regional Office, Groundwater Section
Jack Floyd, Groundwater Section Central Office
Training and Certification (no rating change)
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
City of Mount Airy
Surry County
FOR THE
operation of a sludge land application program consisting of the application of approximately 3,000 dry
tons per year of sludge from the City of Mount Airy wastewater treatment facility to approximately 204.79
acres of land in Surry County with no discharge of wastes to the surface waters, pursuant to the
application received February 3, 1992, 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, 1998, and shall be
subject to the following specified conditions and limitations:
I . 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.
2. 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.
3. 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.
4. 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.
5. No crops for direct human consumption shall be raised on these sites for a period of 18
months following sludge application.

6. Maximum slope for sludge application shall be 10% for surface application and 18% for
subsurface applications.
7. 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.
8. 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.
9. All sludges included in this permit must be stabilized by a process to significantly reduce
pathogens (as described in 40 CFR Part 257, Appendix Il) 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. Upon request, 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 29535,
Raleigh, NC 27626-0535.
10. Specific sludge application area boundaries shall be clearly marked on each site prior to and
during sludge application.
11. No sludge at any time shall be stored at any application site
I' I► USP33 IThUN t I
r
1. The facilities and disposal sites shall be properly maintained and operated at all times.
►a

2. A suitable vegetative cover as listed in condition II 3, shall be maintained in accordance
with the crop management plan approved by this Division.
3. The application rates shall not exceed the following for'the specified crops:
4. No sludges other than the following are hereby approved for land application in accordance
with this permit:
Permit Estimated
Smuge County Number- l m n ar
City of Surry NC0021121 3,000
Mount Airy
5. The lifetime heavy metal loadings shall not exceed the following for the corresponding
Cation Exchange Capacities (CEC):
Lifetime U_ adings (lbs/a�,re)
P=meter
PAN
Alfalfa
250
Blue 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
Smuge County Number- l m n ar
City of Surry NC0021121 3,000
Mount Airy
5. The lifetime heavy metal loadings shall not exceed the following for the corresponding
Cation Exchange Capacities (CEC):
Lifetime U_ adings (lbs/a�,re)
P=meter
CEQ � - 15
Lead
1000
Zinc
500
Copper
250
Nickel
250
Cadmium
9
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.
3

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 lune, sludge and soil mixture of at least 6.5.
1 I: � :1,1 : '•: ► 1 M: u
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), annual pounds/acre of plant available nitrogen
(PAH and annual pounds/acre of phosphorus applied to each field.
4

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
Leadl
Zinc l
pH
Manganese
Cation Exchange Capacity
Sodium
Nickell
Cadmiumi
Copperl
Calcium
l 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
Methoxychlor
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

5. All sludges included in this permit must be monitored for compliance with condition I.9 of
this permit. Data to verify stabilization by a process to significantly reduce pathogens (as
described in 40 CFR Part 257, Appendix II) must be maintained by the Permittee. The
required data is specific to the stabilization process utilized, but should be sufficient to
clearly demonstrate compliance with 40 CFR Part 257.
6. Three copies of all monitoring and reporting requirements as specified in conditions III 1,
111 2, 171 3, III 4, and III 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.
I i 1 191. 1 li ll
1. The GQmpliance Boundary for the disposal system is specified by regulations in 15A
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 143-215.6A.
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 perimeter of the waste disposal areas, or 50
feet within the property boundary.
6

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 BQJJNDARY 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. No land application of waste activities shall be undertaken when the seasonal high water
table is less than three feet below land surface.
3. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
1 `iRW ! ► .
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 tirne 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.
UHNERMI D] 1"KI IR61911211 IR
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.
7

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. Owner/Lessee Application_ Area_ 1 acres
1 Ararat Rock Company 24.85
2 Ararat Rock Company 40.0
3* Ararat Rock Company 19.58
5 Ararat Rock Company 72.02
6 Ararat Rock Company 19.41
8 Ararat Rock Company 28.93
Total 204.79
* - Sludge application is restricted to the knoll of this site.
1 - Application Area excludes buffer areas.
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 15A NCAC 2H .0205
(c)(4).
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 pernut.
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. Prior to land application, the aeration basin sludge shall be conditioned to adjust the sodium
absorption ratio of the sludge to less than ten (10).

13. Issuance of this permit hereby voids Permit No. WQ0000956 issued April 9, 1991.
Permit issued this the 29th day of March, 1993
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Cry J orf CA,
A. Preston oward, Jr., P)E., Director
Division of nvironmental Management
By Authority of the Environmental Management Commission
9

0
SOT �� - _��'. o � • rw� �( •cam _
log
1 w PINE \. - • �- ��,. r /.� \�.�'1.+ ��
!� T {aril 5 � y _ �. .�' � %� � •!� 631: , - - _ a + B R iA2;, � r + ' _
Clt
VT
i
to wv.
Vii, . �ti �� �, �,_ �'; { r1� ~.�` \\� r \� ••a• ��y, c lip
r \ -
10066 •�• . I r�
2 ' q,, .�-" � s� • I �` j � ._�
1��_ �� j �' 'y0 J - - P�•1 �%'J r •
'• P •�---FL� •�. t �_:;`Se -'�._ IS :'��_�-�.,`S[ _ •.\ rr �1"O'i' - /l1•..� ^ ~t,, r•-._
obi � °.. .,I• � _ � t `/lL '?yam '� �, ,-'� •-
,.{1-1� r° r' .� 1100
. o- +`'''''t• ° `' see52
f �Y� _ `- O N i+� �' . a I � q" ` r'~ �.: - �_ � ,_ I � J �N�'�J•• J11
ones
' - � l= 1 � •t .0 %qyI
try, '� jr� %- l!� .�' •,- f r �-•, { y.t
A WT ` '` X �_ r�-�'�,� �+ , � � �`� ` Y � ,� ! � • _36
South•$ide Ch_
If
� '"^. � - � , __� -tip 1 � ' � •• ,: � ,
•;,. . Com, ;°°° �, t • d� � t .�._ _", s - _
". .J t i "� i'i'" _ d 0T •� .lam•, lYsQ "_�
'�_'- J - �5+, _ •- `err _ t�.., \,, ri riyQ � Y
��• ' � � .�_ n � Rte. � R � � a ,
1'`�. ` •'1,��,� ;�'_�', _ cosi
—
uarf
,! � • ��� _.� • '-_` �-~ \ten _ V

Name of Plant: 61,1,1 f
Owner or Contact Person:� Z /zr�r;74i/l
! Mailing Address:_
Comminuting Devices ........... .............
(c) Grit Removal ...............................
County:
Telephone:"16,'1,:0 "�/c-;l
NPDES Permit No. NCDO
Nondisc. Per. No.
issueDate: G'<`
Expiration Date: 3
Existing Facility "-,
New Facility
Rated By: 1 —gr zK'-t1 Dater /
Reviewed (Train. & Cert.) Reg.
Office 7:3. UJ • S •2�-9 I
Reviewed Train. & Cert.) Central
Office
O R CC'cr'�_
_ Grade
ITEM POINTS ITEM POIN
(1) Industrial Pretreatment Units and/or (4) PRIMARY TREATMENT UNITS
Industrial Pretreatment Program (a) Septic Tank (see dgfinilion no. 43) ..............
(see-delinition No. 33) 4 (b) Imhoff Tank _ .......................... _ _ . .
(2) DESIGN FLOW OF PLANT IN GPD (c) Primary Clariliers ............................
(not applicable to non -contaminated cooling (d) Settling Ponds or Settling Tanks for Inorganic
waters, sludge handling facilities for water Non-toxic Materials (sludge handling facilities
purification plants, totally closed cycle for water purification plants, sand, gravel,
systems (def. No. 11), and facilities stone, and other mining operations except
consisting only of Item (4) (d) or Items (4) (d) recreational activities such as gem or gold
and (11) (d)) raining) ........ _ ...................... .
0 -- 20,000 .......................... 1 (5) SECONDARY TREATMENT KNITS
20,001 •- So,000 .......................... 2 (a) Carbonaceous Stage
50,001 -- 100,000 ..... . .................... 3 (i)Aeration - High Purity Oxygen Systema ..... 2
100,001 -- 250,000 .......................... 4 Diffused Air System .... ... - - 1
250,001 -- 500,000 .......................... 5 Mechanical Air System (fixed,
500,001 --1,000,000 .......................... 8 floating or rotor) ..............
1,000,001 -- 2,000,000 ........................ 10 Separate Sludge Reaeration .... .
2,000,001 (and up) - rate 1 point additional for each (ii) Trickling Filter
200,000 gpd capacity up to a High Rate ...................
maximum of 30 Standard Rate ...............
Packed Tower ...............
(iii) Biological Aerated Filler or Aerated
Design Flow (gpd) _ �_ C'G'� G' _ S Biological Filter ......................
(3) PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens ................................
or
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........... .............
(c) Grit Removal ...............................
or
(d) Mechanical or Aerated Grit Removal ...........
2
(e) Flow Measuring Device .......................
1
of
(f) Instrumented Flow Measurement ..............
(g) Preaeration................................
2
(h) Iniluenl Flow Equalization ...................
2
0 Grease or pit Separators - Gravity ..........
2
Mechanical ..........
3
Dissolved Air Flotation.
8
0) PrechlorinaUon ..............................
5
(iv) Aerated Lagoons.. . .
(v) Rotating Biological Contactors ..........
(vi) Sand Filters -
intermittent biological .... .
recirculating biological ... . .
(v1 Stabilization Lagoons ...................
(viii)Clarifier ........... .......... - -
(ix) Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see dei. No. 12) (Points for this item
have to be in addition to items (5) (a)
(i) through (5) (a) (viii) .. _ • - -
(Y) Nutrient additions lo,enhance 800
removal .......................... ...
(x i) Biological Culture ('Super Bugs") addition
to enhance organic compound removal ... - -
V

;gage
,n - High Purity Oxygen System .....
20
(i) Sludge Holding Tank - Aerated ................ 5
Diffused Air System ...........
10
Non-aerated ............ 2
Mechanical Air System (fixed,
O} Sludge Incinerator - (not including activated
- floating, or rotor) ...... ......
a
carbon regeneration) ..... 10
Separate Sludge Reaeration .....
3
(k) Vacuum Filter, Centrifuge or Filter Press or other
similar dewatering devices 1 0
Trickling Fitter -
...... . ..............
High Rate ..............
7
Stagoard Rate ............
5
(8) SLUDGE DISPOSAL (including incinerated ash)
Packed Tower....... ...
5
(a)Lagoons...............F....................... 2
(iii) Biological Aerated Filler or Aerated
(b) Land Application (surface and subsurface)
Biological Fitter .........................
(!v) Rotating Biological Contactors ............
10
10
(see definition 22a)
-where the facility holds the land app. permit ... 1 b
(v) Sand Filter-
-by contracting to a land application operator wh
intermittent biological ........
2
holds the land application permit ................ 2
recirculating biological ........
3
-land application of sludge by a contractor who does
(vi) Clarifier ................................
5
not hold the permit for the wastewater treatment
facility where the sludge is generated ......... 10
(6) TERTIARY OR ADVANCED TREATMENT UNIT
(c) Landfilled (burial) ............................. 5
(a) Activated Carbons Beds -
without carbon regeneration ..................
5
(9) DISINFECTION
(a) Chlorination ..............................
(9
with carbon regeneration ... ...... ......
15
(b) Dechlorination ........................
(b) Powdered or Granular Activated Carbon t=eed -
(c) Ozone .............................. 5
without carbon regeneration .................
5
(d) Radiation .......................... S
with carbon regeneration ...................
15
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(c) Air Stripping .. . . .........................
5
(not applicable to chemical additions rated as item
(d) Denitrification Process (separate process) .....
10
(3) 0), (5) (a) (A), (6) (a), (6) (b), (7) (b). (7) (e),
(e) Efectrodialysis .......... . ................ . ..
5
(9) (a), (9) (b), or (9) (c) 5 points each: List:
(4 Foam Separation .............................
5
. . . . 5
5
(g) Ion Exchange ................................
5
5
(h) Land Application of Treated Effluent
• • . • .
5
(see definition no. 22b) (not applicable for
.. • • .
sand, gravel, stone and other similar mining
(11) MISCELLANEOUS UNITS
operations)
(a) Holding Ponds, Holding Tanks or Settling Ponds
.;�(i) on agriculturally managed sites (See def.
for Organic or Toxic Materials including wastes
No. 4) . ..................................
10
from mining operations containing nitrogen and/or
(il) by high rate infiltration on non -agriculturally
phosphorous compounds in amounts significantly
managed sites (includes rotary distributors
greater than is common for domestic wastewater .......... 4
and similar fixed nozzles stems
4
(b) Effluent Flow Equalization (not applicable to storage
(iii) by subsurface disposal (includes low pressure
basins which are inherent in land application systems). 2
pipe systems and gravity systems except at
(c) Stage Discharge (not applicable to storage basins
plants consisting of septic lank and nitrifica-
tion lines only) ............................
4
inherent in land application systems ......................................`.. 5
(d).........--»
(i) Microscreens ... . ............... ..............
5
(e) Stand -By Power Supply .................................................... ..............
CV
(;) Phosphorus Removal by Biological Processes
(f) Thermal Pollution Control Device ............................................. 3
(See def. No. 26) ............................
20
(k) Polishing Ponds - without aeration .......
2
with aeration ..........
5
(1) Post Aeration - cascade ..............
0
%/�
diffused or mechanical ...
tv
TOTAL POINTS _
(m) Reverse Osmosis ...............................
5
(n) Sand or Mixed -Media Filters - low rate ...........
2
,high rate ..........
5
CLASSIFICATION
(o) Treatment processes for removal of metal or
cyanide ......................... ... .....
Is
Class I ......... ...... _.. _........... 5 - 25 Points
(p) Treatment processes for removal of toxic
Class 11 ............................... .... ......... _. 26- 50 Points
materials other than metal or cyanide .........
15
Class I I....... ................................................ 51- 65 Points
Class1V........................................._........... 66- Up Points
(7j SLUDGE TREATMENT
(a) Sludge Digestion Tank - Heated ...............
41
Facilities having a rating of one through four points, inclusive,
do not require a certified operator. Classification of all other
Aerobic ...............
facilities requires a comparable grade operator in responsible
Unheated .... _ .......
3
charge.
(b) Sludge Stabilization (chemical or thermal) ...... .
{c) Sludge Drying Beds - Gravity .................
%
Facilities having an activated sludge process will be assigned
Class 11.
Vacuum Assisted .......
5
a minimum classification of
(d) Stodge Elutriation .............................
(e) Sludge Conditioner (chemical or thermal) ..... _ ..
5
5
Facilities having treatment processes for the removal of metal
(1) Sludge Thickener (gravity) ........... ... .
, 5
or cyanide will be assigned a minimum classification of Class 11.
(g) Dissolved Air Flotation Unit
(not applicable to a unit rates as (3) (Q .........
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class
{h) Sludge Gas Utilization {including gas storage) .. , ,
111.