NC0026271_Regional Office Historical File Pre 2018 (10)

Mr. Brian Eades
Town of Taylorsville
67 Main Avenue Drive
Taylorsville, North Carolina
Dear Mr. Eades:
Michael F. Easley, Governor
VKilliam G:RossJrz•�ec
North Carolina Department of�Etvi onmcnt and: aturar e$(;f
PAD
Alan W._Klimek;' E. i[ector
vision 0 Water- ality
March 30, 2005 ,
�pR 3 1 2005
28681
Subject: DRAFT NPDES PERMIT
Permit Number NCO026271
Taylorsville WWTP
Alexander County
Enclosed with this letter is a copy of the draft permit for your facility. Please review the
draft very carefully to ensure thorough understanding of the conditions and requirements it
contains.
Your permit is among several in the Catawba River Basin that the Division has targeted for
expedited renewal. Please note changes made to Section A.(1.) of this permit. A weekly average
ammonia limit for summer months has been added as well as a daily maximum limit for Cyanide.
Please submit any comments to me no later than thirty (30) days following your receipt of
the draft. Comments should be sent to the address listed at the bottom of this page. If no adverse
comments are received from the public or from you, this permit will likely be issued in late
January 2005, with an effective date of March 1, 2005.
If you have any questions or comments concerning this draft permit, call me at (919) 733-
5083, extension 538.
Sincerely,
Maur�en Crawford
NPDES Unit
cc: Central Files
NPDES Unit
Mooresville Regional Office_
Aquatic Toxicology Unit
Mr. David Odom, Town Manager
Town of Taylorsville
67 Main Avenue Drive
Taylorsville, North Carolina 28681
6161_1_e �_
No�rthCarolina
Naturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 512 N. Salisbury St Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer-50% Recycled/10% Post Consumer Paper

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Town of Taylorsville
is hereby authorized to discharge wastewater from a facility located at
Town of Taylorsville WWTP
Junction of NCSR 1108 & Minnigan Lane
South of Taylorsville
Alexander County
to receiving waters designated as Lower Little River in the Catawba River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV
hereof.
This permit shall become effective , 2005.
This permit and authorization to discharge shall expire at midnight on March 31, 2010.
Signed this day )2005.
DRAFT
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit Number: NCO026271
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked, and as of this issuance, any previously issued permit bearing this number is no
longer effective. Therefore, the exclusive authority to operate and discharge from this facility
arises under the permit conditions, requirements, terms, and provisions included herein.
Town of Taylorsville is hereby authorized to:
Continue operation of a 0.83 MGD wastewater treatment plant located at the Taylorsville
Wastewater Treatment Plant, junction of NCSR 1108 & Minnigan Lane,
Alexander County, and consisting of the following treatment units:
• Bar screen
• Grit chamber
• Flow splitter box
• Dual aeration basins
• Dual secondary clarifiers
• Dual chlorine contact chambers
• Dechlorination
• Four aerobic sludge digesters
and;
south of Taylorsville,
2. Discharge treated wastewater from said treatment works at the location specified on the attached
map through outfall 001 into Lower Little River, which is classified C water, in the Catawba
River Basin.

Permit Number: NCO026271 low
A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - DRAFT
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge treated wastewater from outfall(s) 001. Such discharges
shall be limited and monitored by the Permittee as specified below:
Effluent,Characteristics
'
° , Limits'
Monitoring Re'gu1rements
Monthl
Avera je
Weekly.: -
.` Average
Daily ,:'
Maximum
1Vleasurement
- Frequency
Sample
Type
$ample
Locationl.
Flow
0.83 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C'
30.0 mg/L
45.0 mg/L
3/Week
Composite
I, E
Total Suspended Solids'
30.0 mg/L
45.0 mg/L
3/Week
Composite
I, E
NH3-N (Summer')
9.5 mg/L
28.5 mg/L
3/Week
Composite
E
NH3-N (Winter')
I Weekly
Composite
E
Fecal Coliform
200/100 ml
400/100 ml
3/Week
Grab
E
Temperature
3/Week
Grab
E
pH4
3/Week
Grab
E
Conductivity
3/Week
Grab
E
Total Residual Chlorine
28 µg/L
3/Week
Grab
E
Cyanide
22 µg/L
2/Month
Grab
E
Copper
2/Month
Composite
E
Chloride
2/Month
Composite
E
Zinc
2/Month
Composite
E
Total Nitrogen
(NO2-N + NO3-N + TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Chronic Toxicity
Quarterly
Composite
E
Footnotes:
1. Sample Location: I- Influent, E — Effluent.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent value (i.e. 85% Removal).
3. Summer is defined as April 1 through October 31; Winter is defined as November 1 through
March 31.
4. The pH of the effluent shall not be less than 6.0 nor greater than 9.0 (on the standard units
scale).
5. Chronic Toxicity (Ceriodaphnia) at 8.2%: January, April, July, October (see Part I. A. (2.)).
Defintions:
MGD — Million gallons per day mg/L — Milligram per liter
µg/L — Microgram per liter ml — Milliliter
BOD — Biochemical Oxygen Demand

Permit Number: NCO026271
A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 8.2%.
The permit holder shall perform at a minimum, quarters monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of January, April, July, October. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase H Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP313 for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow"
in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the address
cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

DENR / DWQ / NPDES Unit
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES Permit NCO026271
INTRODUCTION
The Town of Taylorsville WWTP, herein called the permittee, requires a National Pollutant
Discharge Elimination System (NPDES) permit to dispose treated wastewater to the surface waters of
the state. The permittee's 5-year NPDES permit expired March 31, 2005 and they have requested
renewal from the Division of Water Quality (the Division). This Fact Sheet summarizes background
information and rationale used by the Division's NPDES Unit to determine permit limits and
monitoring conditions.
Table 1 _ The Town of Tavlorcville WWTP
Facility Information
A ;hcant/F•acihtyName''.
Town of Taylorville WWTP
A" . `hcant Address:
67 Main Avenue Drive, Taylorsville, NC 28681
Facility Address:
344 Minnagan Lane, Taylorsville, NC 28681
Permtited,Flow.(MGO). ' , .,
0.83 MGD
:Type of Waste: -
Domestic/Industrial (70/30)
,Facility.Gra4e / Pernif Status:'°-•
Class III, Major / Renewal
Drainage Basin: =
Catawba River Basin
Counties:,.
Facility: Alexander County
Miscellaneous
Receiving Stream:;_-,;
Lower Little River
Regional..Qffice:
Mooresville
Stream Classification:,,,,,-,;
C
State Grid I . '--
USGS'Topo_ Quad'.
D14NW
Taylorsville
303(d)Listed�
No
Permit Writer:
Maureen Crawford
Subbasin:
03-08-32
Date
16 March 2005
Drainage Area (sq. mi.) •
73.3
Lat. 35° 53' 02" Long. 81' 11' 44"
Summer 7Q10 (cfs) <
14.4
Winter7Q10 (cfs)-_
25.3
3OQ2 (cfs)
Average Flow (cfs) ., .
84.3
FACILITY RECORDS REVIEW
Facility Description. The Town of Taylorsville (Table 1) operates a 0.83 MGD wastewater
treatment plant consisting of the following treatment units:
■ Bar screen
■ Grit chamber
■ Flow splitter box
■ Dual aeration basins
■ Dual secondary clarifiers
■ Dual chlorine contact chambers
■ Dechlorination equipment
■ Four aerobic sludge digesters
The effluent from the plant is discharged to the Lower Little River in the Catawba River Basin and is
currently limited and monitored as outlined in Table 1.
Fact Sheet
Renewal -- NPDES Permit N00026271
Page I

Table 1. Current NPDES Permit Limitation & Monitorine Re uirements
Effluent Characteristics
Limits
Monitoring Requirements .
Monthly
Average
Weekly:'Daily
Average `
.,
Average`
Measurement
Frequency...-]
Sample Type
Sample ,.
Location' .l
Flow
0.83 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C
30.0 mg/L
45.0 mg/L
3/Week
Composite
1, E
Total Suspended Residue
30.0 mg/L
45.0 mg/L
3/Week
Composite
I, E
NH3-N (Summer)
9.5 mg/L
3/Week
Composite
E
NH3-N Winter)
Weekly
Composite
E
Fecal Coliform
200/100 ml
400/100 ml
3/Week
Grab
E
Tem erature
3/Week
Grab
E
H
3/Week
Grab
E
Conductivity
3/Week
Grab
E
Total Residual Chlorine
28 µg/L
3/Week
Grab
E
Cyanide
2/Month
Grab
E
Copper
2/Month
Composite
E
Chloride
2/Month
Composite
E
Zinc
2/Month
Composite
E
Total Nitrogen
(NOZ-N + NO,-N + TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Chronic Toxicity
Quarterly
Composite
E
CORRESPONDENCE
Staff Report. Mooresville Regional Office (FRO) conducted an annual facility inspection and B.
Dee Browder, prepared a Staff Report dated December 2, 2004. The MRO staff found the facility in
good condition and in compliance with the permit recommending that the NPDES Unit renew the
permit in accordance with the basin plan.
Division Records and Permittee's Renewal Application. The current permit expires on March 31,
2005, and the Division received a timely request to renew the permit from the permittee's (Standard
Form 2A) on October 4, 2004.
COMPLIANCE REVIEW
Verifying Existing Stream Conditions. This facility discharges to receiving waters designated as
Lower Little River, a Class C waterbody within the Catawba River Basin.
Whole Effluent Toxicity (WET) Testing. The Division reviewed the Town of Thomasville's quarterly
Whole Effluent Toxicity records from January 2001 through January 2005 and all show as passing.
Notices of Violation (NOVs) and Penalty Assessment. In October 2001 a penalty was assessed for
exceeding the permit's Total Residual Chlorine (TRC) limit. In December 2003 the permittee was
assessed for both exceeding the permit's TRC and pH limit.
Toxicant Chronic and Acute Impact — Pollutants of Concern (POCs). To establish POCs, the Division
reviewed the permit application, discharge monitoring reports (Jan 2003 through Jan 2005). The Division
then performed a standard Reasonable Potential Analysis (RPA).
DRAFT tact Sheet
Renewal -- NPDES NCO026271
Pace 2

If a ?OC showed reasonable potential, the Division included a permit limit as a Daily Maximum to
protect the receiving stream against acute toxic affects. Similarly, if the maximum exceeded the chronic
standard, a Weekly Average limit was added to the permit. Findings are summarized below.
Table 2- Town of TnvInrQviIIP XVWTP d-16v­­_ VID A V._A.___ __ -3 " __
Parameter
SamplesI
!Wits
Maximum
'16wable
ts-
UV lcte(V,
Copper50
14
86.95 pg/L
85 gg/L
Yes
No toxicity problem, therefore no
limit, monitoring 2/Month
Cyanlde
50
4
223.82 gg/L
61 4g/L
Yes
a Daily Maximum limit
ZLncI
50
50
488.40 [ig/1-
610 pg/1-
No
—Added
No toxicity problem, therefore no
limit, monitoring 2/Month
­­ . vw.auui U ­­ JULaLLUaill vv Mal yudiny oLauciarci.
Tahlp. 3- Town of Tavinrevilh. VVW'rV - A-..+- IDIDA V­4.___ ---a . -
rae. er,,­­a
S ,
j
n
jlifi'
i A
MaxlAli,
ed,
n
w /n
fi"),, V y,
'ietlofi�4
sCopper
50
14
86.95 pg/L
F 7 p
Yes
No toxicity problem, therefore no
limit; monitoring 2/Month
Cyanide
50
4
223.82 gg/L
22 Rg/L
Yes
Added a Daily Maximum limit
ine-2,
50
50
488.40 �Lg/L
67 pg/L
—Ye
s
No toxicity problem, therefore no
-------
limit; monitoring 2/Month
------ — ­11- wOLIuani vy aLCI YU41ILY OLURUdRI.
RENEWAL SUMMARY
Revising Ammonia (NH3) Limits. Per EPA guidance, the Division will add ammonia Weekly
Average.limits to this permit (summer only). The Town of Thomasville's weekly* average limits have
been calculated by multiplying the monthly averages times three, i.e., 9.5 mg/L x 3 = 28.5 mg/L.
Table4. Permit Renewal __ Ri-.rnmmPnaPi
-Q e
Added Weeldy Average Limits, per EPA requirement; revised summer limit.
Co'
Yes
Action Level Standard, no TOX problem therefore no limits; monitoring 2/Month
C `anide
Yes
A Daily Maximum limit was added.
Yes
Action Level Standard, no TOX problem therefore no limits; monitoring 2/Month
Current Stream Conditions
The stream is not listed on North Carolina's 303(d) list.
At the point of discharge, Lower Little River is classified as a class C water.
Instrearn Monitoring
No instrearn monitoring is recommended during the permit cycle. The level B model indicates that
secondary limits will protect the receiving stream and no instrearn monitoring was recommended..
PROPOSED CHANGES
• Change under limit of Effluent Limitations from Daily Average to Daily Max.
• Add NH3 limit for summer only
DRAFT Fact Sheet
Renewal -- NPDES NCO026271
Page 3

PROPOSED SCHEDULE OF ISSUANCE
Draft Permit to Public Notice: March 30; 2005
Permit Scheduled to Issue: April 1, 2005
NPDES UNIT CONTACT
If you have questions regarding any of the above information or on the attached permit, please
contact Maureen Crawford at [phone] ext. 538.
0
REGIONAL OFFICE COMMENTS
NAME • DATE:
REGIONAL SUPERVISOR: DATE:
NPDES SUPERVISOR: DATE:
DRAFT Fact Sheet
Renewal -- NPDES NCO026271
Page 4

Table 1. Profe:ct anformati`on Table .2. Parameters of Concern
Name Type Chronic 'Modifier Acute PQL Units
Facility Name
t Towri�of.TaylorsVille`.WWTP j�5':
Par01
WWTP Grade
: Ill
�'Par02
NPDES Permit
NC0026271 �Y ;°
Par03
Outfall
Par04
x r 001
Flow; ,Qw (MGD) .'
Par05
0.8
Receiving Stream
"P•ar06
; Lower.Little River
C `
Stream Class
MIDs..(cfs)
Par07
Par08
14.4 -
MI.Ow (oft)
Par09
` 25 3
35 2 r :
„• -
30Q2 (cfs)
Par10
QA (cfs) ...
Par11
n y 84: r: ,:'-
Jan 2003 ,Jan 2005
Time Period
Par12.
Data Sources)
Par13
VAM4
.. 2l, ...DM
�.
'
'
Par15
i4rsenrc f'=
NC
`50
'
Beryllrum
Cadmium:
NC'
Chromium
NC
r'S0
1022x
h
ug/L
�a
Copper, 1
NC
yE
' 7
AL
7.3
ug/L
Cyamdet "
C
5
Fluoride
NC000
Lead',
N'C
25 , , -
,- N•_ °
33 8g/L
Mercury
NC
00120002
ug/L� `
„E.
Molypdenum
A
3500 s;
; ` j
ug1L
r
261
s
ug/L
r �r
Phenols r"
A ;
1 '
} N
ug/L
' xSeleniurn'
Srlver
NC
Q 06
1
AL,
1 23r
ug/L
�.
s
.
Zinc
AL
67
ig/L
26271_RPA, input
3/15/2005
1

m A
O O
A A A A -4 A A� A W W W W W W w W W W N N N N N
m V m M A W N 0 0 m V m cn A W N -+ O m m V m N
N N N N N
A W
W.
N O ID m V m UI A W N -+ O 0 m V m o A W N —
..
:
D -
-< 'N�
to r'l0
:
ICD ! (D (N1)
n<< C`
O
0to O
O C) 0O
O OO O O O
N .n.=
N
N
N OO O NO
OO
(DO
i.;._,...
-
WWA
W W co W W W W W:
A'�:A•�ggrt�'J�
'd
_ ..
— s ...� s .... —
s .... s u
O O
Cn m. O'A W O O O:O O OHO O A O O N A V N ��-O O
0
N (n N' IJ Ot Ul cn- Ut N N- N N'
O (J'>O O, N Ul Cn W W W (JI,V'(It
W
... ..
W
O
O
(n (n
_ _
m N Ul ?. W. O o (Il A Ul Ul N A
N A• V N b
s -� ..a N .� N cn N N
m N (n N
V
O O
0 0
. . . .
O 0 O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
b b
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
N b cn (n O1 N V N 0 N N 0 m 0 0 N N N N N
a
0 0 0 0 0 m O 0 0 0 0 O O 0 0 0 0 O 0 N O
0 0 0 0 0 0 0
�
0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o r
0 0
3 3R: - n K�n m
X X = to Cl N
T O C
N n G fD
N
a c o
ID
u
C. A O N m
O V DD W ? m
(On 00 00 WO
m (DD (bil
coo O A O N
C C
IO O
r r
m A
O co
A A m A A A A A A w W W W W W W w j W N N N N N
V W Ul A W N O (D m V T m A W N O ID m V m M
N N N N
m
A W N O (D m V— (A A W N O (O m V m m A W N
ID o_.;., p CD c c C D � -n," c
i0 Z Q' '� - " D � . L .. � . D . � -n
-
.
o .� a 3W, ¢•.
.�o;. .<( v.Io c a.: ,m -.v m m,• .m�
0
00 '. CD C) 0 -� 0 O 0 1O 0 O
' O O _ O o - ''o b' O ' 0', �O O O 011D
00
A O A i:0 p O
.
:..0 .0 0 10 O' O p '0 CD '
W W W
-.7A
�r d n;n n n n
JR, .vm�.r..s�,: .. .�•.,.. 4sd.;a`
nA'.nn >Ms>nan n'nnnhi� n ns`n in O
w,iwx.so--41W1,....cLq N ...:..�s..n.r.�r • wwiaz a�u ., c�G�+t Y:
N c]I
(JI UI c)1 (71'cT a, o'o m a 0 cn cn m _O W c71'CJl .UI cm, Ul"Ul
(ll Ul Ul,. cu
cJl (Jl Ul ctl (31.�:'(h�_C"
O CCD)
O
.cn
O O O O"O 0 0 'O O O. O O O O O 'b O O O O O' O O O
O O O O.O O O O O O O 0' 0 0 0 O O 0 :O C. 0'0 00
•cn m Uli (Il (T OF UI DI Ill Gl'c}l (Jl Q) (P
O O O'O 0.. 0 0 0': _
O O O O O O O`O O 0'0 O O 0'0
O.O O O
O O.
O. O O O"O O.O O O O,O,O,'O OO .O O O Oro O O O O
0 .O O O 0"0 O O:.O O O O' O O O .O O O O O;.
O OO O O'O O POP O O -O O O O`O O O 0.0 O OOca
o
n
r
m
O 0
0 0
N m m 0 a m O m N m al m 0 m O m m m m m 0 m O m
0 o C. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0
m 0 (n m (n (n m m 0 a a m m in cn m m UI 0 N" (n O O O
O O 0 0 0 O 0 O o O 0
(p
O 0 0 O o 0 0 O 0 o O o 0 r
K�S: _C)KU)x
x x ; <m a H
T O C
N n < N
a N O
I I
N m cJ N W m
W A
N 0 0 (n OV Om N
0 0 0 O V O N
(O (O
r r
cT A.
O ID
A A A A A A N A A W W W W W CO W W W CO N N N N N
Co. V DI (n A W N� O (D m V m Ut A W N� O b m V (P (n
N N N N N
A
W N O (D m V D) Ul A W N O Co m V m (Jl A W N
CD
< (n
;n,� •. m,,N
.O ,oN . ,.,.coN I
'
O
O O N N N
O-
N 'N N
NNp l� d
O OO
0W
o
O
AA? .O. _
OCND
.....ON, i
=.�
- ., N,(D
W "WOW
W W
Ca:
m N
CT::m m IDIW W m N A A (D`mfN 01.A N V A.0 V.O V V
V Co Co, A.W A_.Co
V N
'.''N A'm UI.V O W W W.W m A-V Ul m V;V N' -+ W
W N m-A O m Ai;(n A V tD• O m co
m".�`J .V (D O cT O;m (D Am A A (D-O m A
al
O
cn N O W W W m N A A 0 m N m A N V A O V 0 V
m m— A W M A
7
V N
A A V j
N m V V N W
-i ID N m A O m A Ul A V wO m m
j m m V V O O Ul O m ID A m A A (D O OD O A m (D A N
C!
00
O o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 00
O o O O O o p O O O o O O p O O O O o r
CD a m x
a)
T a) O c
ID
N N n < N
a � O
� 11
co co O fmll r
m D) O cn T N
�
A O cn N o IP
0 0 0 O O W
C C
O O
rr
m
//�
/D
V/
0
Tz
W
r
m
0
m
z
D
r
D
z
D
/V/
V/

M.,
REASONABLE POTENTIAL ANALYSIS
Town of Taylorsville WWTP
NCO026271
lime Period Jan 2003 - Jan 2005
Qw (MGD)
0.83
7Q10S (cfs)
14.4
7Q10W (cfs)
25.3
30Q2 (cfs)
35.2
Avg. Stream Flow, QA (cfs)
84.3
Rec'ving Stream Lower Little River
WWrP Class III
IWC (%) @ 7Q10S 8.2013
@ 7Q10W 4.8389
@ 30Q2 3.526
@ QA 1.5032
Stream Class C
Outfall 001
Qw = 0.83 MGD
STANDARDS 8
PARAMETER
TYPE
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NCW05/
(11
Chronic Acute cute
n 6Det. MaxPredCw AllowableCw
Acute: 7
Copper
NC
7 AL 7.3
ug/L
50 14
86.950
i
Acute: 22
Cyanide
NC
5 N 22
10
ug/L
50 4
223.820
............
Chronic: 61
yi
Acute: 67
Zinc
NC
50 AL 67
ug/L
50 50
488.400
Chronic: 610Ll
-'
'Legend:
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
Freshwater Discharge
26271_RPA.rpa
3/1512005