NC0026271_Regional Office Historical File Pre 2018 (25)

i
state of' North Carolina
iepartment iF- Environment,
lealth and A'tural Resources
ivision of En°Vironmental Management
ames B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
�f
Mr. Robert W. Duncan
Town of Taylorsville
204 Main Avenue Dr. S.E.
Taylorsville, NC 28681
Dear Mr. Duncan:
May 14, 1993
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F�91)ORf�Iltiff ��13,�f�% ICE
Subject: NPDES Permit No. N00026271
Taylorsville WWTP
Alexander County
On . March 8, 1993, the Division of, Environmental Management received a request for
modification of NPDES Permit No. NC0026271. Due to the modifications of the 15A NCAC 2H
.0500 Monitoring Regulations the monitoring frequency for BOD, Total Suspended Residue, Fecal
Coliform and Temperature have been changed to three times per week to reflect the regulations
and the classification of this facility. Total Residual Chlorine remains daily as it did in the
regulation modification. Accordingly, we are forwarding herewith the effluent pages with the
requested changes. These pages should be added to your NPDES permit and the old effluent pages
removed. Also attached is a copy of your rating sheet showing the class III rating.
i
All other :terms and conditions contained in the original permit remain unchanged and in full
effect.. These modifications are issued pursuant to the requirements of North Carolina. General
Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U. S.
Environmental Protection Agency dated December 6, 1983.
If you have any questions concerning these permit modifications, please contact Mr. Randy
Kepler at telephone number 919/733-5083:
Sincerely yours,
. Preston H/ard, Jr., PE
cc.00r�su (!`e egio : I off a
Compliance
Mr. Jim Patrick, EPA
Permits and Engineering
Central Files
Box 29535, Raleigh, North Carolina 27626-0535 " Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-6onsumer paps r

rho.FFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 -October 31) Permit No. NCO026271
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic.
Flow
BOD, 5 day, 200C**
Total Suspended Residue**
NH3 asN
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Discharge. Limitation.,
Monthly Avg
0.43 NW
30.0 mg/I
30.0 mg/I
17.8 mg/I
200.0 /100 ml
* Sample locations: E - Effluent, I - Influent
Weekly Avg,. Daily Max
45.0 mg/I
45.0 mg/I ,
400.0 /100 ml
Monitoring.
Requirements
Measurement
Sample
*S.ample
Frequency
Type
Location
Continuous
Recording
I or E
3/Week
Composite
E,
3/Week
Composite
E, I
Weekly
Composite
E
3/Week
Grab
E
Daily
Grab
E.
3/Week
Grab
E
Quarterly
Composite
E
Quarterly
Composite
E
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than•trace amounts.

A. O. EFFLUENT LIMITATIONS,AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0026271
During the.period beginning on(the effective date of the permit and lasting until expiration, the Permittee is authorized -to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic.
Flow
BOD, 5 day, 200C*'
Total Suspended Residue**
NH3 asN
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Discharge Limitation:
Monthly Avg Weekly. Avq. Daily Max
0.43 IV1GD
30.0 mg/1 45.0 mg/1
30.0 mg/1 - 45.0 rrg/1
200.0 /100 ml 400.0 /100 ml
•P-oll.uta<n-i�A.n,a:l.y.s'i.s*-*_***
* Sample locations: E - Effluent, I - Influent
Monitoring
Requirements
Measurement
Sample
*Sample
Frequency
ape
Location
Continuous
Recording
I or E
3/Week .
Composite
E,
3/Week'
Composite
E,
Weekly
Composite
E
3/Week
Grab
E
Daily
Grab
E
3/Week
Grab
E
Quarterly
Composite
E
Quarterly
Composite
E
Annually
E -
I
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample.'
There shall be no discharge of floating solids or visible foam in other than trace amounts.
J

ITEM
County: Allp-li onk?_y Telephone: OLyi0/0
-NPDES Permit No. N C 0 0 X_&"X Nondisc. Per. No.
I s So e D a.t-e: AloAfthgr
Expiration DateJ4w_WWtW./f�7
Existing , Facility V/ New 'Faci,lity
Rated By: i Date:
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.). Central Office
ORC Grade
POINTS ITEM'
(1) Industrial Pretreatment . Units and/or.
Industrial Pretreatment Program
(see>definilion No. 33)
(2) - aUNFLOW16 F PLANT IN GPD
(not applicable,[ '(o' non-co*ntami - nated cooling
waters, sl - u d ge�- " handling lacililies, for water
Purifical!op�., plants, totally closed cycle
and facilities
consislrng
M*of-' Item (4) (d) or Items (4) (d)
a n. d
i6
5 0 0
_2dbdf� A
00
50 .. .......... ..................
................................
P-250 000
.......... ...........
'P25
........................ Ry
00 LrI'YjQODOOI
00 J'tj
..............
in( '2ddilion2l for each
00.'000 gpd C2p2City Up
to a
tht'
,­Mrhum.j, 01 30
M
9M
-V4 'I
A
3 `
. . . . . . . . . . . . .
faVjly ..........
mechanical
DisS'Iv,1J A; . r (a.
4
2
3
4
8
10
2
2
2
2
r-
P01,
(4) PRIMA9Y'TREATMENT UNITS
:(a) Tank (see definition no. 43) . . . ....
M Imhoff tank .. . . . . . .
(c) Primary. Clarifiers I
(d) Sell.ling .Ponds- or Settling Tanks for Inorganic
Non -.toxic -Materials " (sludge handlihg* facilities
forr',w�aler p
purificaliori plants, sand: gravel,
stone,' and other mining
operations except
recre..a)Iional activities such as gem. or gold
............ ......... r .............
(5) SECONDARY'TREATMENT UNITS
.(a) Carbop?ceous Stage_
(i)Aer . alion- High Purity'Oxy'gen System . . . . .. 2
Diffused Air Syslefn .. . . . . . (,
Mechanical A.ir.-S'ys!em (fixed,
floating or rotor)
separate Sludge-Aeaeralioin
Trickling Filter
Nigh Rate 7
Standard Rate
Packed Tosye,
(M) Biological Aerated Filter or Aerated
..Biological Filter 1 C
(iv) Aerated Lagoons ......... 1 C
(v) Rolating Biological ConIacIo'r,s*.'*"
(vi) sand Fillers -
Intermit
recircul
iological 3
(vii) SlFbilization Lagoon 'MAY.- Is 5.
(viii)C12fifier .... 5
(ix) Single -'stage system 'for ' C *0'Mirw(
carbonaceous remoDENT�MLjJLE, COPY
nitrogenous removal by nitrification
(see def. No. 12) 1
have to be in addilim6—f -ems (5, (2)
(i) through (5) (a) (viii)
(x) Nutrient additions to enhance' 8O'D ......
removal
(xi) Biological Cu ! Ilure ('Svpef.-.8ugS') addition
to enhance organic compound removal . . . . .
I I I

itrogenous, St
.
A -
e
to i -H •h''.Pur' I l -
e`n = -
S s e -
9 l rft'
Difused-��S's'te.., ��: :�' ( ) • - e-i4Ho Ids •_ 9� n-�� .r
�Aloerna-
laeed
-S tem�(fiechantcalAm ;:-
M-Aic'zedr:a'
led -
-
-
_ "• < - floalm •or roloncineratc;t�' not ='includin- acliv'
„ _
:•'.. 8.
- -Separate Sludge Reaerahon:• {.:.::.;.�k:.:.V _'_- r•, rJ: P carbon;regeneralio'n).: =
(u) Trickling Filler - . O _.acuum F�Iler,.Ce'nirifube;or.Filler Press or olh
• similar dev, a(ering devices
High Rate.. i w ;` .. .
`- Standard Rale ... ...N 5.' , • (8) SLLIDGE •DISPOSAL: (inclpdirjg• itfcine'raled ash)
Packed Tower ..... .:.... • 5:.. .
(i t t) Biological Ae4ated-Filter.'.Q�, Aeca ed' . (a) Lagoons , :.. . _, :
:.:..:.:.... .•.........
. , {b) Land'Ap.plicatioh't(;surface•and si
Biological Filler'.. 1 0 subsurface)
..•.
(iv) Rotating Biological Contactors .........:� . 1 p , . , .-where 'the facilil see definili holds the 'land app. permit
'22a "
.(v) Sand Fill�:f-� .., � , ..,,• �
.
conlr�L�ling-•lo a land application operator v
intermittent l6i618gical : . . 2 holds the land application permit .......
recirculating biological .... 3 -land application of sludge -by a contractor who
(vi) Clarifier ............ . ...:......:.:. S not•''.jioId `th.e permit for the wastewater lrealmf
• f '1•l h
(6) TERTIARY OR ADVANCED TREATMENT UNIT
aci i y w ere the sludge Is generated ........
(c) Landfilled (burial)
(a)
Activated Carbons Beds -
....... _ .
(9)- DISINFECTION
without carbon regeneration ................•..
5.
(a) Chlo; inalion'_ !
`.'
'
with carbon regeneration . . ........... . ; ; ...
1 5
.. , , r;
(b) Decl4tor 4"6n -- r.t't . '
(b)
, �;
Powdered or Granular Activated Carbon Feed
(c) Ozone ' ' ' • • • • • • • • •
t
without carbon regeneration .................
5
....:...............
(d) Radiation
with carbon regeneration ...................
1 5
. . ....................... .
(10) CHEMICAL ADDITION SYSTEM (S) (See definition
(c)
Air Stripping ...................
5
No. 9)
(not applicable. to chemical additions -rated
(d)
(e)
Denilrification Process (separate process) . . . . .
Electrodialysis
10
as item
3
() (1):'(5) fart (xi). (6) (a). (6) (b), (7) (b), (7) (e).
(f)
..............................
Foam Separation
5
(9) (a), (9) (b), or (9) (c) 5 points each: List:
(g)
.............................
Ion Exchange........
5
(h)
Land Application of Tr'ealed Effluent
(see definition no. 22b) (not applicable for
sand, gravel, stone and other similar mining
operations)
on agriculturally managed sites (See def.
No. 4) ........ .........................
(ii) by high -rate infiltration on non -agriculturally
10
managed sites- (includes rotary distributors
and similar fixed nozzle syslems) ..... .
4
(iii) by subsurface disposal (includes, low pressure
pipe systems and gravity systems except at
Plants consisting of septic "lank and nilrifica-
tion lines only) .......... . ..................
4
(i)
Microscreens ......
5
(j)
Phosphorus Removal by Biological Processes
(See def. No. 26) 20
_.. (k)
Polishing Ponds - without aeration ..
2
.;_
with aeration .... _ ..
5
Post Aeration - cascade
0
diffused or mechanical
5
(m) Reverse Osmosis ..................... .
(n) Sand or Mixed -Media Fillers - low rate ...... .
high rate ......... .
-(o) Treatment processes for removal of metal or
cyanide...........:
?. (p) Treatrtient processes for removal of toxic
materials other than metal or -cyanide
S W DG E.TR EATM ENT
..(a)' -Sludge Digestion Tank - Healed .......... .
. Aerobic .............. .
Unhealed ......
(b) Sludge Stabilization (chemical or thermal) .
(c) Sludge Drying Beds Gravity .. .
Vacuum Assisled .......
(d):- Sludge El" Irialion ........... .
(e).`�Slu.dge Condilioner (chemical or thermal) .. .
:.:
tFr(l.) Sludge .Thickener (gravity) ...... -
�(g)r.Dissolved Air Flotation Unit
applicable to a unit tales as (3) (i)
Sludge Gas Ulifizalion (including gas storage) .
5
2
5
(11) 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
basins which are inherent in land application systems
(c) Stage Discharge .(not applicable to storage basins
inherent in land application systems ............................:.
Pumps................. ..................................................................................
(e)• Stand By Po:ver Supple .............
(I) Thermal Pollution Control Device ............................................
. - 'TOTAL POINTS
CLASSIFICATION
1 S Class I ........................................................... 5 - 25 Points
ClassII ........................................................ 26- 50 Points
i 5 lass Ill.. ................................................... 51- 65 Points
Class IV ...................... 66- Up Points
10
O
5
3
5
0
5
5
5
5
8
2
Facilities having a rating of one through four points, inclusive
do not require a cerlified operator. Classification of all olhe,
facilities requires a comparable grade operator in responsible
charge.
Facililies having an activated sludge process will be assigned
a minimum classilicalion of Class II.
Facililies. having Ir,eaiment processes for the removal of: melz
or cyanide will be assigned a minimum cfassilicalion -oi Class
Facililies having treatment processes !or the biologic-! remw
p! phosphorus will be assigned a minimum classific;,ii� ni ^t