NC0074306_Staff Report_19921202

SOC PRIORITY PROJECT: No
IF YES, SOC NUMBER
TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
ATTENTION: Susan Robson
DATE: December 2, 1992
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY Rutherford
PERMIT NUMBER NCO074306
PART I - GENERAL INFORMATION
1. Facility and Address: Town of Forest City, WATER PLANT
Post Office Box 728
Forest City, N. C. 28043
2. Date of Investigation: October 20, 1992
3. Report Prepared By: James R. Reid
4. Persons Contacted and Telephone Number: Steve Hill
704-248-5215
5. Directions to Site: From the intersection of Vance Street (NCSR
1585) and Highway 74 Bus/221A in Forest City, travel North on
Vance Street approximately 1.5 miles to the water plant which is
located on the left.
6. Discharge Point(s), List for all discharge points:
Latitude: 350 20' 56" Longitude: 810 51' 53"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. U.S.G.S. Quad Name Forest City, NC
7. Site size and expansion area consistent with application?
X Yes No If No, explain:
8. Topography (relationship to flood plain included): Terraced
Sloped above flood plain.
Page 1 LZi
E®

9. Location of nearest dwelling: Approximately 300 feet.
10. Receiving stream or affected surface waters: UT Second Broad
River.
a. Classification: WS IV
b. River Basin and Subbasin No.: BRD 030802
C. Describe receiving stream features and pertinent downstream
uses: Wildlife support and source of process and potable
water.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted No flow limitation in
existing permit, but 1.5 MGD is believed to be ultimate design
capacity.
MGD (Ultimate Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? No limitation.
C. Actual treatment capacity of the current facility (current
design capacity 1.5
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two years:
None.
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: Two alternating
inorganic solids settling basins with recycle pump.
f. Please provide a description of proposed wastewater treatment
facilities:
g. Possible toxic impacts to surface waters: None known or
suspected.
h. Pretreatment Program (POTWs only):
in development approved
should be required not needed X
2. Residuals handling and utilization/disposal scheme: Land
application will occur at some point. Town will file appropriate
form for land application at such time as necessary.
a. If residuals are being land applied, please specify DEM
Permit Number
Residuals Contractor
Telephone Number
b. Residuals stabilization: PSRP PFRP OTHER
Page 2

c . Landf i 11:
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating sheet): I
4. SIC Codes(s): 4941
Wastewater Code(s) of actual wastewater, not particular facilities
i.e., non -contact cooling water discharge from a metal plating
company would be 14, not 56.
Primary 21 Secondary
Main Treatment Unit Code: 50003
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
or are any public monies involved. (municipals only)? No new
construction, renewal only.
2. Special monitoring or limitations (including toxicity) requests:
No
3. Important SOC, JOC, or Compliance Schedule dates: (Please
indicate) N/A
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated all
of the non -discharge options available. Please provide regional
perspective for each option evaluated.
Spray Irrigation:
Connection to Regional Sewer System:
Subsurface:
Other disposal options: Recycling of supernatant occurs at most
times. Discharge only occurs if recycle pump problems occur.
5. Other Special Items:
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS
Renewal of NPDES Permit NCO074306 is recommended.
i
Si a of Report Preparer
Zo
ter Quality Regional Supervisor
Date /7
Page 4

MAIN,
` �� � � � \� � }�� ƒ�
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:)CALF._ I -VI{ ULASSIFIC;A 1 IUId Of-
Name of Plant:
Owner or Contact Person: , , S r 3,, �; ���� �, et � � ��,•
Mailing Address: � ��y� a2
•.
I 'e, 4 . )
County:_/ 0-M& eZ 1F0 r� T rer hone:
NPDES Permit -No. NC00 Nondisc. Per. No.
lssueDateAr
:_ &X13 / a Expiration Date: T 20
Existing Facility l/ New Facility
Rated By:�. i Date: / 2 ,3
Reviewed (Train. & Cert.) Reg. Office &Lv�
Reviewed (Train. & Cert.) Central Office
ORC Grade
Plant Class: (circle one) I II III IV 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. stud e
s•ir ' ��. • .
to :w - uAl'c i6' totally
closed cycle?'sjrste'his'(def. No. 11 , an act sties"
consisting -only 'ot°It?3hf (4)''(d) or Items, (4) (d)` and' (11) (d))
0 -- 20,000..........................
.
1
20.001 •• 50,000......................
2
50,001 •- 100,000 0.., - .. .. . .
3
..:�
100.001 •- 250;0t)0`:..: ':::...........�..
,
..�..
250.001 -- 500.000................ .. ..
5
- •500.001--10000,000 ................ ....: `';
....
8
1,000,001--.2,00O,ODO .:............. ......
10
2,000.001 (and up) - rate 1 point additional for each
gpd capacity' up: to a
;''"-"maximum of 30
Design Flow (gpd)• :
(3) , PRELIMINARY UNITS (see definition no. 32)
(a) Bar Scr ............... _ � X, . .
eens�3" : ..
1
or
1 (b)::Mechanical"'Sot��it'gStaiic Screens or
Commt6ttgg"Dii'.2
•........
(c). Grit Rerimoiiai .-r...:..:.:........•.•.•. .
1
.>. or
(d) Mechanical or Aerated Grit Removal .... , , , , , ; • `'
2
(e) Flow Measuring Device .......................
1
or
(f) Instrumented Flow Measurement ..............
2
(g) Preaerationto
` - (h) Influent Flow-Equalizalion ...................
2
Grease or Oil Separators - Gravity ..........
2
r L ; ; Mechanical .. _ ...:.. .
Dissolved
Air Flotation.
' R • G) Prechlorination ..............................
8
5
.(4) PRIMARY TREATMENT UNITS
` (a) Septic Tank (see definition no. 43) .............. 2
(b) Imhoff Tank .................................. 5
(c) Primary Clarifiers ........................... 5
(d) Settling Ponas 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
mining) ........... 2
(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
(i i i) Biological -Aerated , Filter � �or= Aerated
Biological Filter ........ ...............
10
(iv) Aerated Lagoons .....................
1.0
(v) Rotating Biological Contactors :.........
10
(vi) Sand Filters- `
inte'rmittenit'6iological ..... '
2
recirculating biological .....
3
(vii) Stabilization Lagoons .... ...
�.
5
..:. (vliQClarifier ......:
5
(ix) Single 'stage- system''for'combined -
carbonaceous remdv0.6'Ld6Q and '
nitrogenous re`moal�fj {iitrtficatton , t
• .• -- •' •- (see 'def:' No 12 '(oirsfo
ifiis�itein
to be :in -Vditronr $Yiiehis(5)'(a), ,
(i) through (5) (a) (vi"a}%:.l"...:: ...'
8
(x) Nutrient additions to enhance BOD
removal ...............................
5
(xi) Biological Culture ("Super Bugs") addition
to enhance organtc'compoufv -rem-oval ::..:'
5
(b) , Nitrogenous -Stage- • - <
(i) Aeration - High'= Purnly'Oxyga`' System : �' 't: '
' 26
Diffused Air System . .......
10
- - Mb * WihicaN Atr ,S stem (fined.
f o.aIiii . bt dt �} 3 ...
.8
an, -St peals' b-'resReaeratton`.....
3
-(IQ;' Trickling Filter. " ='" N -4•
High Rate ... .......
7
Standard Rate' .'. ........
5
Packed Tower*:..: ...
5
(III) Biological Aerated Filter'=or Aerated
Biological Filter ................. '-.'. -...
10
(iv) Rotating Biological Contactors ..... ".......
10
(v) Sand Filter -
intermittent biological ........ 2
recircu!aling biological ........ 3
(vi) Clarifier ..... ...................... 5

rcRTIARY Oft ADViANCEO Tr1EATMENT UNIT
(a) Activated Carbons Beds -
withoul carbon regeneration
wills carbon regeneralion ... $
(b) Powdered or Granular Activated Carbon Feed - . 5
without carbon regeneration ..... .
with carbon regeneration . ' ' ' ' S
(c) Air Stripping ........ ................. 15
(d) Denitrilication Process (separate p(ocess) . , , U
(e) Electrodialysis ....... .
(0 Foam Separation .. , , , " " " ' • • • 5
(g) Ion Exchange... ••-..................... 5
(h) Land Application of Treated "Effluent . . • . . . • 5
(see definition no. 22b) (not applicable for
sand, gravel, stone and other similar mining
Operations)
(i) on agricullurally managed sites (See def.
No. 4) .. „ _
(6) by high rate infiltration on non - a g r .. 10
managed sites (includes rotary distributors on -agriculturally
and similar fixed nozzle systems) ... , . , , . , . .
(III) by subsurface disposal (includes low pressure
Pipe systems and gravity systems except at
plants consisting of septic lank and nitrifica-
tion lines only),,,,,•._•-•.
V) Microscreens ...... ................ ' 4
(j) Phosphorus Remo.ral�by -Biological Processes 5
(See def. No. 26) .......
(k) Polishing Ponds - without aeration . . • . • • ' ' 20
with aeration . . .. . . . 2
(1) Post Aeration - cascade ... •_ . • .. 5
0
(m) Reverse Osmosis . , .
diffused or mechanical . $
_
(n) Sand or Mixed -Media Filters - low rate•, , • - ' ' ' ' S
high rate .......... 5
(o) Treatment processes for removal of metal or -
cyanide .
(p) Treatment processes .for -removal •of • • � •oxi' ' ' ' ' 15
materials other than metal or cyanide •tc • -
3LUbt3E TREATMENT
(a) Sludge Digestion Tank -_Heated .. .
10
Aerobic ............. 5
(b) Sludge Stabilization Unheated ............. 3
(chemical or thermal) 5
(c) Sludge Drying Beds - Gravity ............ .
Vacuum • . � • 2
d SludgeAssisted , 5
(e)' 'Sludge conditioner
,(che • �or..th •rmat) • - •
........ .
(1) Sludge: :Thrcke a, t; ...... 5
(g) Dissolved • Air. Flotatlioa - ' • ' '
h (nos _applicable to a,C rates as (3).C) T , , , • , . .
8
O Sludge..Gas; Utilizatiorl.- ndudtng gas storage) - . 2
0) • Sludge Holding Tank, . Aerated . - - , , .. .
:. Non -aerated ...... 2
0) Sludge Incinerator - (not including activated -
carbon regeneration) . , , , , 10
(k) Vacuum Filter. Centrifuge or.,_Filter. Press or other
similar dewaten* ig devices
SLUDGE DISPOSAL (including itcinerated ash). ..s - �'� 10
(a) Lagoons..'... -.-
b ,+Land - "
() }� �• ., Appticalion�(" a4'a cl subsurface) ........ .
IMP I
where Ihtt, faetlily,.t boils, lhenland app. permit .. - 10
by conlracGng 'to a land .application operator who
holds the land application permit ...... .
-land application of sludge . by a contractor •who does
not hold the permit. for the wastewater treatment
facility where .the sludge is generated -
(c) Landfilled (burial) . " , ..
" " ' ' ' ' 0
DISINFECTION " • " " " 5
(a) Chlorination .. , • , "
(b) Dechlorinalion ....... 5
(c) Ozone ............... • 5
. .
(d) nadialion ............ 5
S
(10) CI4EMICAL ADDITION SYSTEM (S) (See definition No. 9)
(not applicable to chemical additions rated as item
(3) (1)• (5) (a) (Xi). (6) (a). (6) (b). (7) (b). (7) (e).
(9) (a), (9) (b), or (9) (c) 5 points each: List:
5
5
01) 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 ........ (b) Effluent Flow Equalization (not applicable to storage 4
basins which are inherent in land application systems). 2
(c) Stage Discharge (not applicable to storage basins
(d) tinhereumps ,t in • land application systems ......................................
(e) Stand -By Power Supply .......-......�.�.-..� ....... .............
............
. 3
(f) Thermal Pollution Control Device
:'�"""""""
'.......................................... 3
TOTAL POINTS
CLASSIFICATION
ClassI............................................................ 5 - . 25 Points
Class11............. :.....................
Class iII. .................... 26- SO Points
..............................................
Class IV... 51- 65.. Points
................................................... 66- -Up Points
Facilities having. a,:rating of one through (our poin do not require a .certified operator. - Classircatiom oF.-all: other Is.. inclusive
charge.
facilities requires .a comparable grade operator :in responsible
Facilities having an -activated sludge proces;will: be assigned
a minimum classification of Class
Facilities having treatment processes for the.)removal of
metal
or cyanide will be assigned a minimum classification of C assil.
Facilities having keatri ent processes' far the {biological removal
of phosphorus will be assigned a minimum classification of Class
III.
In -plant processes and related control equipmentxwhich are an
integral part bf industrial production shall not :66' consldered waste
treatment. Likewise., discharges of waste
having a design flow of i 600 firom residences
rating. 9Pd or less;,shapnQbb pasubject to
ADDITIONALCOMMENTS: