NC0049905_Wasteload Allocation_19930920

DIVISION OF ENVIRONMENTAL MANAGEMENT
September 20, 1993
MEMORANDUM
TO: Susan Robson
Pi
FROM: Susan A. Wilson A
THROUGH: Carla Sanderson W
SUBJECT: Chevron USA (NPDES No. NC0049905)
UT Grants Creek, Yadkin River Basin
Rowan County
The Rapid Assessment Group has the following comments with regard to Chevron's
inquiry to their proposed permit:
Item 1. Discharge to a "dry ditch" is still considered waters of the state and is subject to
North Carolina water quality regulations.
Item 2. Because Chevron has not been subject to a turbidity, TSS, or temperature limit in
the past, a monitoring requirement can be inserted for one year with a limit to be imposed
after the completion of that year. This will allow the facility time to comply with the limit.
Item 3. The limits imposed are based on standard operating procedures for facilities
discharging this type of mixed wastewater (i.e. stormwater runoff, non contact cooling
water, boiler blowdown).
Item 4. The total suspended solids measurement includes only nonfiltrable matter. The
turbidity measurement includes most solids (dissolved and colloidal particles, as well as
suspended solids) in order to assess the clarity of the water. Because these measurements
are not the same, both should be included in the permit.
Item 5. The temperature limit is based on standard temperature language for the discharge
of cooling water and/or boiler blowdown. Since the discharge is essentially to a ditch with
no stream flow, the effluent temperature should not exceed 32°C.
The Rapid Assessment Group does not feel that any of the requirements imposed in this
renewal are excessive and recommends that the requirements be implemented in the final
permit.
cc: D. Rex Gleason, MRO

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From.
North Carolina Department of Environment,
Health, and Natural Resources gs)
Printed on Recycled Paper

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
MEMORANDUM
C E I -I N Fi.
September 10, 1993
To: Carla Sanderson, Rapid Assessment Group
Rex Gleason, P.E., Mooresville Regional Office
From: Susan Robson, Environmental Technician
Subject: Comments on Draft Permit
Chevron U.S.A.
Rowan County
NPDES: NC0049905
Attached please find a request from Chevron, U.S.A. requesting a reduction/deletion of
temperature, TSS, and turbidity monitoring. Please review this request and comment as
appropriate.
Thank you for your comments.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

chevronitigo
August 12, 1993
COMMENTS ON DRAFT PERMIT
NPDES NO. NC0049905
Ms. Coleen Sullins
NPDES Permits Group
North Carolina Department of Environment
Health and Natural Resources
512 North Salisbury Street
Raleigh, North Carolina 27611
Dear Ms. Sullins:
Chevron
Chevron U.S.A. Products Company
1200 State Street
Perth Amboy, New Jersey 08861
Pursuant to my telephone conversation on August 9, 1993 with Ms. Susan Robson and
Ms. Susan Wilson, I am submitting this letter requesting a modification to the draft
permit dated 7/28/93, Section A, "Effluent Limitations and Monitoring Requirements
Final" (attached).
The draft permit specifies new monitoring characteristics and limits for temperature, TSS
and turbidity. These effluent characteristics are inappropriate for the following reasons:
1. The effluent from the facility batch discharges from an earthen basin to a dry ditch.
For this type of discharge there is no environmental benefit for regulating these
characteristics.
2. The effluent (to our knowledge) has never been tested for these characteristics, and
we do not know if these limits are achievable. We are very uncomfortable accepting
limits which we have no idea can be complied with.
3. There is no statement identifying the basis for monitoring these new characteristics or
setting these limits.
4. Having limits on both TSS and turbidity is excessive since both are measurements of
suspended solids.
5. The temperature effluent characteristic is inappropriate because the discharge is to a
dry creek, there is no receiving stream. We request that this characteristic be deleted.
For the above reasons we request that TSS and Tturbidity characteristics be deleted from
the permit or, at the very least, monitor only for TSS with no discharge limitations
specified.

If you have any questions, we would appreciate the opportunity to discuss them with you.
Please contact Larry Ettel, Terminal Manager, at [phone] or Bill Nowak at (908)
738-2222.
Very truly yours,
>II 7/07A/42
kao(L
W. G. Nowak
Compliance Specialist
WGN:ams
Attachment
cc: Larry Ettel

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0049905
PERMITTEE NAME:
FACILITY NAME:
Chevron USA, Inc.
Salisbury Facility
Facility Status: Existing
Permit Status: Renewal
Major Minor -'1
Pipe No.: 001
Design Capacity:
Domestic (% of Flow):
Industrial (% of Flow): 100 %
Comments:
Stormwater, dust -control water, NCCW. BBD, & "spill clean-up".
STREAM INDEX: 12-109
RECEIVING STREAM: an unnamed tributary to Grants Creek
Class: C
Sub -Basin: 03-07-04
Reference USGS Quad: E16NE, Rowan Mills
County: Rowan
Regional Office: Mooresville Regional Office
Previous Exp. Date: 9/30/92 Treatment Plant Class: 0
Classification changes within three miles: ; �t
>3mi. ' 6
Requested by:
Prepared by:
Reviewed by:
WQmac,
Jule Shanklin
J
(
(please attach)
Date: 4/24/92
Date:
Date: i
Modeler
Date Rec.
(tm 4
Drainage Area (mil ) z 0. Avg. Streamflow (cfs): 4 D - I
7Q10 (cfs) CJ Winter 7Q10 (cfs) 0 30Q2 (cfs) 6
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
,k.om-n-tt-y
AA46
PAIL-'
Mv),Ki&unn
BOD5 (mg/1)
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
,e1-cJ
F. Col. (/100 ml)
pH (SU)
_9
Olt- 4t omt/L)
4-5
v..p./ ,D P-1 cr\iTu :
So (w e i
.
)e' d')
1C%"PU2C.
ascMRe4e SNJlu. Nor
was IratOEPAlute
CAUSE 145 AFL ,M
To EJCcer,* 2.$ "c. A
114‹..041LOtirJP kn13, uJ
3 Z°C_
No CASG (AUStT jc
Comments: 5-(ANPAP-47 c ou +J4 lestAreg. LAM (, E soon
L SD IN RPPriioni ro PiSive umi
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��EX88/MP
COMPLIANCE EVALUATION ANALY%I% REPORT
03/3i/92
PAG E i
"^ PERMIT .... .... NC0049905 1:1IPE--001 REPORT PERIOD: 002-920i LOC---E
FACILITY --CHEVRON U%A INC %ALI%BURY FLOW-- .O0OO CLA%%--0
LOCATION --- -%ALI%BURY REGION/COUNTY--03 ROWAN
50050 00400 00556 32730
MONTH Q/MPH OIL-TR%E PHENOL%
LIMIT 9.0 6.0 F 30.O00
9i/02
LIMIT NOL 9.0 6.O F 30.00O NOL
91/03 .Oi40 5.8-5.8FLE%IS, THAN LE%IS, THAN
9i/04
9i/05
9i/06
9i/07
9i/O8
9i/0(;)
.Oi40 7.O-7.0 LE%%THAN LE%�THAN
.0i40 6.2-6.2 /'4.00LE%%THAN
`
^0140 6.2.... 6.2 ''12 2 1 .. THAN
-^
_
`
AVERAGE .0140 ------__ 8.300
MAXIMUM .01140 7.000 i2.600
MINIMUM ^0i4O 5.880 4^000 ________
UNIT MCD 11U MG/L MG/L
__

,
' , ,
^
� EX88/Mp
,
COMPLIANCE EVALUATION ANALY%I% REPORT
03/ 3 i/92
PACE i
^ PERMIT--NCO049905 PIPE--00i REPORT PERIOD- 9002-9i�i
FACILITY --CHEVRON U%A INC %ALI%BURY PLT DESIGN FLOW ^
-- 00O0 CLA%%--0
LOCATION %ALI%BURY -----'' '--- ^
-- RE�ION/COUNTY--03 ROWAN
MONTH
50O50
Q/M�D
OO400 00556 32730
PH OIL -ARSE PHENOL%
LIMIT NOL 9.O 6.0 F NOL
90/02 .0i40 6.8-6.8 i M .080O
90/03
90/04 .2086 7.0~7.0 LE%%THAN LE%%TH/N
90/05 .2i80 6.i--- 6.i LE%%THAN .0600
90/06
90/07 .0i40 7.i-7.i LE%%THAN .0600
90/08
90/09
90/i0 .0860 6.5-6.4 LE%%THAN LE%%THAN
AVERAGE .108i . 12.000 .0666
MAXIMUM .2i80 7.i00 i2.000 .08O0
MINIMUM .0 0 6.i00 i2.000 .0600
UNIT MGD %U MO/L MCh/L
,

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~w1-^""'`I ''""
COMPLIANCE EVALUATION ANALAll % REPORT vu/u//��
PAGE i
,
.
^ PERMIT--NCO049905 1:1IPE--00i REPORT PERIOw 8902-908i
FACILITY --CHEVRON USA INC %ALI%BURY PLT DE%RN FLOW-~ .000O-- CLA%%--Ell
LOCATION .... .... %ALI%BURY REG%ON/COUNIT Y--03 ROWAN
50050 00400 00556 32730
MONTH Q/M6D PH PHENOL%
LIMIT 9.0 6.0 F 30.00O
89/O2
89/03
89/04
LIMIT NOL 9.0 6.0 F 30'000 NOL
89/05 .024O 7.4-7.4 .000 .0000
89/06 .0420 7.4.... 7.4 LE%%THAN LESit THAN
_
89/O9 .0420 6.6-6.6 LE%%THAN LE%%THAN
89/i0
89/i1
89/12 .0420 5.9-5.9F 36.000FLE%%TH01N
AVERAGE .0375 ._.__ i8.000 .0O00
MAXIMUM .0420 7.4O0 36.000
MINIMUM .0240 5.90O 36.000
UNIT MGD to MG/L MG/L
-

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Chevron USA
NC0049905
Industrial - 100%
Existing
Renewal
UT Grants Creek
C
030704
Rowan
MRO
J. Shanklin
4/24/92
E16NE
Request #
6894
D. DST. O? NATURAL
RESOURCES AND
Oomi 1JN1T ' DEVELOPMENT
OCT 1 5 1992
DIVISION OF F.NtIROWaNTR. NUWACEatFIIJ
=RESYALLE RECIONAL IFH
Stream Characteristic;
USGS #
Date:
Drainage Area (nii2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
<0.1
0
0
<0.1
0
100.0
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Wasteflow consists of stormwater runoff, water used for dust control, spill cleanup, 200 gpd
NCCW, 1500 gpd of boiler blowdown, and hydrotest water for testing new tanks (occasionally).
The facility processes base asphalt material.
MRO reports that the facility is well maintained. TSB recommends keeping
frequency of twice per month for this discharge.
Special Schedule Requirements and additional comments from Reviewers:
MA-e- #(.c .(
Recommended by:, J� ,,,_ `-7/ Date: l 0 8
Reviewed by
Instream Assessment:
Regional Supervisor:/Y'�'
Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY:
Nov
Date: /6
Date:
Date: /l/I��GI 2-
1 1. 1992

Existing Limits
Flow (MGD):
Oil & Grease (mg/I):
Phenols
pH
Recommended Limits
Flow (MGD)
pH (SU):
Oil & Grease (mg/1):
TSS (mg/1):
Turbidity (NTU):
Temperature
6.91-A0 ma-0 Goot.1.04
wKr4 LArAuk4t y rtouq>
1tJ)
TOXICS
Mon. Avg, Daily max Freq,
monitor
30
monitor
weekly est
60 2/month
2/month
6-8.5 weekly
Monthly Average Daily Max.
monitor
6-9
45
45
50
Discharge shall not cause the
receiving water's temperature to
exceed 2.8°C above background
and in no case cause it to exceed
32°C.
-- Flow metering is not required. Flow may be estimated.
Mon. Freq. WOJEL
instantaneous
or estimate
2/mQrH
2/i or rr
2/ Martl
2/ ivtoti'[tl
EL
EL
EL
(See page three for special monitoring requirments.)
*The turbidity in the receiving stream will not exceed 50 NTU. (If 7Q10 = 0, 50 NTU applies as
an effluent limit.)
Limits Changes Due To: Parameter(s) Affected
New regulations/standards/procedures pH, O&G,turbidity,flow
New facility information
OR
_X_ No parameters are water quality limited, but this discharge may affect future allocations.
WASTELOAD SENT TO EPA? (Major) _N (Y or N)
(If yes, then attach schematic toxics spreadsheet, copy of model, or if not modeled, then old
assumptions that were made, and description of how wasteload fits into basinwide plan.)
Additional Information attached? _N_ (Y or N) If yes, explain with attachments.

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'MPDE% PERMIT NONC0049905
PIPE NO001
" CURRENT
PAGE i
CHEVRON U%A INC %ALI%BURY PLT 03 ROWAN
i825 JAKE ALEXANDER BLVD
%ALI%BURY NC 28144
FIN MONITORIN� REQUIREMENT% FOR PERMIT PERIOD
EFFLUENT DATE %AMPLE MEA�URINC
CHARA�TERI%TIC% FROM/TO LOCATION FREQUENCY
PH
(004O8)
PH
(�0400)
--
/ PH
(00400)
���_----'
OIL-G,R%E
(OO556)
OIL-C;R%E
(00556)
PHENOL%
(32730)
Q/MGD
(50050)
/
/ Q/M(.,;D
(5009O)
82/04/3O
86/0i/0i
86/0i/02
87/04/3@
87/i0/0i
92/O9/30
82/04/30
86/01/01
86/0i/02
87/04/3O
87/i0/0i
92/09/30
87/i0/0i
92/09/30
86/0i/O2
87/O4/30
87/i0/01
92/09/30
�
E ONCE/ MONTH
E WEEKLY
E WEEKLY
TYPE
SAMPLE
GRAB %AMPL
GRAB %AMPL
-
GRAB %
ONCE/ MONTH GRAB %AMPL
THROUGH 9 2 / 0 9 / 3 0
DURING MEA%URING'
MONTH % OF FREQUENCY
TWIC,E/ MONTH
-
TWICE/ MONTH
-
ONCE/ MONTH
WEEKLY
WEEKLY
GRAB %AMPL
GRAB %AMPL
GRAB %AMPL
IN%TANTOU%
_
E%TIMATE
�

�KE~8i/"P
'ibiPDES PERMIT NONC0049905
PIPE NCI� 00i
" CURRENT
PA�E i
CHEVRON USA INC %AL%%BURY PLT 03 ROWAN
i825 JAKE ALEXANDER BLVD
%A ... I%BURY NC 28144
FIN DI%CHARC;E LIMITATION% FOR PERMIT PERIOD
EFFLUENT CHARACTER%C
DATE FROM/TO
PH
82/O4/30
PH
86/0i/02
PH
87/i0/0i
\
OIL-GR%E
82/04/3O
PHENOLS
_ 87/i0/0i
Q/M�D
86/0i/02
Q/MGD
87/i0/0i
(00400)
86/0i/0i
(00400)
87/04/30
(O04O0)
92/09/30
. - -
(0@556)
86/0i/0i
THROUGH 92/09/30
QTY UNIT%/ CONCENTRATION UNIT%
QUANTITY LIMITS CONC UNIT% AVERAGE MAXIMUM MINIMUM
%U
%U
%U
MG/L
(00556>
87/04/30 MC/L
--__'-_----___-
(00556)
92/09/30 MG/L
92/09/3@
/
(�0050)
87/04/3O
(5005
92/09/30/
`-_--_-'------
8.5O0 6.000
MAXIMUM MINIMUM
9.000 6.000
MAXIMUM MINIMUM
9.000 6.000
MAXIMUM MINIMUM
30.0O0 60.0O0
30DA AV DAILY MX
30^0OO 6O.000
30DA AV DAILY MX
30.000 60.000
30DA AV DAILY MAX

To: Permits and Engineering Unit
Water Quality Section
Date: March 31, 1992
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Rowan
NPDES Permit No.: NC0049905 E OV
MRO No.: 92 - 53
APR 0 3 le,62
PART I - GENERAL INFORMATION
1. Facility and Address: Chevron U. S . A. , IncAEC*C4 WP°RT BRAt1CH
1825 Jake Alexander Boulevard
Salisbury, North carolina 28144
2. Date of Investigation: March 30, 1992
3. Report Prepared By: G. T. Chen
4. Person Contacted and Telephone Number: Mr. L. A. Blackman,
Plant Supervisor; [phone]
5. Directions to Site: From the junction of Highway 150 and
Highway 70/601 (Jake Alexander Boulevard) in Salisbury,
Rowan County, travel north on Highway 70/601 approximately
1.8 miles. Chevron USA is on the left (west) of the road.
6. Discharge Point(s), List for all discharge Points: -
Latitude: 35° 41' 03"
Longitude: 80° 30' 34"
Attach a USGS Map Extract and indicate treatment plant site
and discharge point on map.
USGS Quad No.: E 16 NE USGS Quad Name: Rowan Mills, NC
7. Size (land available for expansion and upgrading): Limited
land area available for expansion/upgrading of the contain-
ment basin.
8. Topography (relationship to flood plain included): 1 - 2%
slopes toward containment basin which does not appear to be
in a flood plain.
9. Location of Nearest Dwelling: None within 500 feet of the
facility.
PLOTTED

10. Receiving Stream or Affected Surface Waters: Unnamed
tributary to Grants Creek.
a. Classification: C
b. River Basin and Subbasin No.: Yadkin and 03-07-04
c. Describe receiving stream features and pertinent
downstream uses: Wasteflow is discharged from the
containment basin (via a manually operated gate) into
a dry ditch which is parallel to railroad tracks.
The dry ditch is tributary to Grants Creek.
Downstream users are unknown.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of Wastewater: 0% Domestic
100% Industrial
a. Volume of Wastewater: N/A MGD* (Design Capacity)
*Intermittent Discharge
b. Types and quantities of industrial wastewater:
Wastewater collected in the containment basin consists
primarily of storm runoff, water used for dust control,
spill clean-up, and also approximately 200 gpd of non -
contact cooling water plus approximately 1,500 gpd of
boiler blow -down. The Company also proposes to discharge
hydrotest water used for testing new storage tanks during
the installation process.
c. Prevalent toxic constituents in wastewater: N/A
d. Pretreatment Program (POTWs only): N/A
in development
should be required
approved
not needed
2. Production Rates (industrial discharges only) in pounds per
day: N/A
a. Highest month in past 12 months: lbs/day
b. Highest year in the past 5 years: lbs/day
3. Description of Industrial Process (for industries only) and
Applicable CFR Part and Subpart: Processing base asphalt
material into a variety of asphalt products.
4. Type of Treatment (specify whether proposed or existing):
The existing facility consists of mainly a spill containment
basin (capacity: 100,000 gpd) and a series of subsurface
drainage pipes leading to the basin. Effluent is discharged
from the containment basin into a dry ditch parallel to
rail -road tracks by manually opening a gate valve.

5. Sludge Handling and Disposal Scheme: Grit chamber is
cleaned annually; and an insignificant amount of dirt and
grit is disposed to an on -site dumpster. Sediment formed
in the basin is removed when necessary and placed on Company
property. A permit for the disposal of sediment may be
necessary.
6. Treatment Plant Classification (attach completed rating
sheet): Class 0, see attached rating sheet.
7. SIC Code(s): 2951
Wastewater Code(s):
Primary: 73
Secondary: 14, 16
Main Treatment Unit Code: 00000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grants
Funds (municipals only)? N/A
2. Special monitoring requests: N/A
3. Additional effluent limits requests: N/A
4. Air Quality and/or Groundwater concerns or hazardous waste
utilized at this facility that may impact water quality, air
quality or groundwater? The existing wasteflow is primarily
of stormwater, water used for dust control and spill clean-up,
and a small amount of non -contact cooling water and boiler
blow -down. No hazardous waste is utilized at this facility.
No adverse impact on air, groundwater and/or water quality is
anticipated from the subject discharge.
5. Other: N/A
PART IV - EVALUATION AND RECOMMENDATIONS
On -site inspection indicated that the subject facility was
properly maintained. However, one violation of Permit limits for
pH was noted (March, 1991) for the period from February, 1991
through January, 1992.
It is recommended that the subject permit be renewed as
requested by the applicant.
—r 04-01—f-a
Signature f Report Preparer Date
D r2i,e
C-et4-4,-\ 11-0 2---
Water Quality ReonalSupervisor Da e

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Name of Plant: elekon • vl5'I)
Owner or Contact Person: M. ljr._)'. 5 61141 t15k)
Mailing Address: 1125-,Ake Ail xa,d eadgairei
County: ,Dit/40 Telephone: (04) Z36 -.ON
NPDES Permit No. NCOO 44 910c Nondisc. Per. No.
lssueDate: Sot'/. /7, /9B7 Expiration Date:
Existing Facility V New Facility
Rated By: 6. 7.' _ Date:
Reviewed (Train. & Cert.), Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC Z 4. /3l1c4m4,t Grade
Plant Class: (circle one) I II ID 1V Total Points
ITEM POINTS
(1)
Industrial Pretreatment Units and/or
Industrial Pretreatment Program
(see definition No. 33) 4
(2) DESIGN FLOW OF PLANT IN GPD
(not applicable to non -contaminated cooling waters, sludge
handling facilities for water purification plants, totally
closed cycle systems (def. No. 11), and facilities
consisting only of Item (4) (d) or Items (4) (d) and (11) (d»
0 -- 20,000 ' 1
20.001 -- 50.000 1�
50.001 -- 100,000 3
100,001 — 250,000 4
250.001 — 500,000 5
500,001—1,000,000 8
1,000,001 -. 2,000.000 10
2,000,001 (and up) - rate 1 point additional for each
200.000 gpd capacity up to a
maxi um of 30
Design Flow (gpd) : %gtt/Ihitte dfS / g
(3) PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens 1
or
• (b) Mechanical Screens, Static Screens or
Comminuting Devices
(c) Grit Removal
or
(d) Mechanical or Aerated Grit Removal
(e) Flow Measuring Device
or
(f) Instrumented Flow Measurement
(g) Preaeration
2
1
2
1
2
2
(h) Influent Flow•Equatization 2
(i) Grease or Oil Separators - Gravity 2
Mechanical 3
Dissolved Air Flotation. 8
(j) Prechlorination 5
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) 2
(b) Imhoff Tank 5
(c) Primary Clarifiers 5
(d) Settling Ponds or Settling Tanks for Inorganic
Non -toxic Materials (sludge handling facilities
for water purification plants. sand. gravel.
stone, and other mining operations except
recreational activities such as gem or gold
miniing)
v
/frz
(5) 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
(ii) Trickling Filter
High Rate 7
Standard Rate 5
Packed Tower 5
(i i I) Biological Aerated Filter or Aerated
Biological Filter t 0
(iv) Aerated Lagoons 10
(v) Rotating Biological Contactors i 0
(vi) Sand Filters -
intermittent biological 2
recirculating biological 3
(vil) Stabilization Lagoons
(viii)Clarifier 5
(ix) Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see def. No. 12) (Points for this item
have to be in addition to items (5) (a)
(i) through (5) (a) (viii) 8
(x) Nutrient additions to enhance BOD
removal 5
(xi) Biological Culture ('Super Bugs') addition
to enhance organic compound removal 5
(b) Nitrogenous Stage
(i) Aeration - High Purity Oxygen System 2 0
Diffused Air System 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
(i i i) Biological Aerated Filter or Aerated
Biological Filter 10
(iv) Rotating Biological Contactors 10
(v) Sand Filter -
intermittent biological 2
recirculating biological 3
(vi) Clarifier 5

(6) TERTIARY OR ADVANCED TREATMENT UNIT
(a) Activated Carbons 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) Air Stripping 5
(d) Denitrification Process (separate process) 10
(e) Electrodiatysis .. 5
(I) Foam Separation • 5
(g) ton Exchange 5
(h) Land Application of Treated Effluent
(see definition no. 22b) (not applicable for
sand, gravel. stone and other similar mining
operations)
(i) on agriculturally managed sites (See def
No 4) 10
(ii) by high rate infiltration on non -agriculturally
managed sites (includes rotary distributors
and similar fixed nozzle systems) 4
(iii) by subsurface disposal (ncludes low pressure
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion fines only) 4
(i) Microscreens 5
(j) Phosphorus Remoial by Biological Processes
(See def. No. 26) 2 0
(k) Polishing Ponds - without aeration 2
with aeration 5
(1) Post Aeration - cascade • - 0
diffused or mechanical • . 5
(m) Reverse Osmosis 5
(n) Sand or Mixed -Media Filters - low rate 2
high rale 5
(o) Treatment processes for removal of metal or
cyanide 15
(p) Treatment processes for removal of toxic
materials other than metal or cyanide
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(10) CHEMICAL ADDITION SYSTEM (S) (See definition No.-9)
(not applicable to chemical additions rated as item
(3) (!). (5) (a) (xi). (6) (a). (6) (b). (7) (b). (7) (e)•
(9) (a). (9) (b). or (9) (c) 5 points each: List:
5.
5
5
MISCELLANEOUS UNITS
(a) Holding Ponds. Holding Tanks or Settling Ponds
for Organic or Toxic Materials including wastes
from mining operations containing nitrogen and/or
phosphorous compounds in amounts significantly
greater than is common for domestic wastewater 4
(b) Effluent Flow Equalization (not applicable to storage
basins which are inherent in land application systems)2
(c) Stage Discharge (not applicable to storage basins •
inherent in land application systems 5
(d) Purnps.N.NN...N.•••••••..•N.NN.N.^N3
(e) Stand -By Power SupplyN.NN.NN.NN.NN.NN.NN.N...N.N.NNNN.NN.NN.N3
(f) Thermal Pollution Control Device 3
TOTAL POINTS
Class L 5 • - 25 Points
Class II NN .NNN N 26- 50 Points
Class I11N.....NN.NN NN.rM.MMMMN.NN 51- 65 Points
Class IV- 66- Up Points
CLASSIFICATION
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.
15 Facilities having an activated sludge process will be assigned
a minimum classification of Class 1I.
SLUDGE TREATMENT
(a) Sludge Digestion Tank • Heated 10
Aerobic . 5
Unheated 3
(b) Sludge Stabilization (chemical or thermal) 5
(c) Sludge Drying Beds • Gravity 2
Vacuum Assisted 5
Sludge Elutriatron 5
Sludge Conditioner (chemical or thermal) 5
Sludge Thickener (gravity) 5
Dissolved Air Rotation Unit
(not applicable to a unit rates as (3) (i) 8
Sludge Gas Utilization (including gas storage) • . • • 2
Sludge Holding Tank - Aerated 5
Non -aerated 2
Sludge incinerator - (not including activated
carbon regeneration) 10
Vacuum Filter. Centrifuge or Filter Press or other
similar dewatering devices . - 10
SLUDGE DISPOSAL (including incinerated ash)
(a) Lagoons 2
(b) Land Application (surface and subsurface)
(see definition 22a)
-where the facility holds the land app. rmit ... 10
-by contracting to a land application operator who
holds the Land application permit 2
-land application of sludge by a contractor who does
not hold the permit for the wastewater treatment
facility where the sludge is generated 10
(c) Landlilled (burial) • 5
(g) DISINFECTION
(a) Chlorination 5
(b) Dechlodnation 5
(c) Ozone 5
(d) Radiation 5
(8)
Facilities having treatment processes for the removal of metal
or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class
11I.
In -plant processes and related control equipment which are an
integral part of industrial production shall not be considered waste
treatment. Likewise. discharges of wastewater from residences
having a design flow of 1.000 gpd or less. shall not be subject to
rating.
ADDITIONAL COMMENTSz