NC0021229_WASTELOAD ALLOCATION_19950127

NPDES DOCYNENT SCANNING COVER SHEET
NPDES Permit: NC0021229
Old Fort WWTP
Document Type: Permit Issuance
-Wasteload Allocation
Authorization to Construct (AtQ
Permit Modification
Engineering Alternatives Analysis
201 Facilities Plan
Instream Assessment (6713)
Speculative Limits
Permit
History
Document Date: January 27, 1995
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content on the reverse side

1
NPDES WASTE LOAD ALLOCATION
PERMIT NO.:
NC002t229 Modeler JDateRec. #
13ERMITTEE NAME: Town of Old Fort MMLJ 2 It 9 8o5D B)
FACILITY NAME:
Old Fort W WTP Drainage Area (mi ) V7 Avg. Streamtlow (cfs): Z 7
Facility Status: Existing 7Qt0 (cfs) 4.4 Winter 7Q10 (cfs) �• 9 30Q2 (cfs) 7 7
Permit Status: Renewal with Modification Toxicity Limits: IWC 2Z % 6. r✓wD Acute
Major Minor InstreamMonitoririg: 2 $ 90 Q I•LM,D Sys, Dtr, a. J,h
Pipe No.: OOl Parameters�n , DO. her&I' nn1d r
nn In✓
Design Capacity: 0.8 MGD /
bUpstream � Location @, lvarf-/Oaf a/n✓e /e�pp AA��
Domestic (% of Flow): J,7- qO7a Downstream''_ Location adwnllasl7 ) -Ve 01r7�,[[��� /
Industrial (% of Flow): /c 5070 t nova o� Curh.r (�
Recommended t •mite• EXisffll'
�x'76/LGon
Comments: Wasteflow, (MGD): M 8n Avg Week Avg I.I Mon Avg Week:Avg
Modification: O increase from 0.8 MGD to 1.2 MGD. Need limits at BODS(mg/1): 1 1.2
th. NH3N(mg/t): 30 45 i 30 8(w) 45
DO(mg/1):
TSS (mg/1): 30 45 5(s)*
RECEIVING STREAM:Cui1iS Creek Fecal�Col. (/100 ml): 1200 400 30 45
pH (SU): 200
6-9 6 9 400
Class: C-Trout Residual Oil and Grease Chlorine
(µgn):'' 77 I 28
Sub-Basin: 03-08-30 (nd (mg/1):
Reference USGS Quad: E tONW, Old Fort (please attach) TN(mg/1): monitor I monitor monitor
y McDowell - — monitor
Count _
�-
Daily Max.
Regional Office: Asheville Regional Office Flow (MGD) 0.8 - ;,;,, - N14 ffit1X
Cadmium ug/ 1 1.2 :onth av
Previous Exp. Date: 4/30/95 Treatment Plant Class: 11 Cyanide (ug/1): 23UAj) 1. Ca �h+ va^T
—
Classification changes within three miles: Chromium(ug/1): monitorL_TM P 18 (CA)Copper(ug/1): Monitor AL _Monitaf Lrm10
None w/in 3 mi. Changes to C farther downstream. Nickel (ug/1): 'ikleaiterLTMP _ Monitor AL
Lead (ug/1): -Monitor LTM P NWa tor. LM? (0
,��jj 7tnc (ugA): Monitor AL _ M t-rmp -
1 i(/ I 1/4/94 OF/0+r n14 rt I r Monitor AL
Requested by: Dana Bolden Date: L Mun;tror I
Prepared by: Date: / Comments:4C q h 6., i ) ' /�/��S
A- ,^ � // / !3
Reviewed by: ��V-� f�M(;�,C�ir0O✓�-' Date: i a� 61J �
Bo-D , 0Xm6j2 iso(siw) i•zmeo io3.5�� �S� l PLOTTLD
�. L-L - LFMP- rvrc(u`+\e ip LTY11P

State-of North Carolina
Department of Environment,
Health and Natural 'Resources � • "
Division of Environmental Management r
James B. Hunt, Jr., Governor A�
Jonathan B. Howes, Secretary p E H N F�
A. Preston Howard, Jr., P.E., Director
June 16, 1994
The Honorable Robert F. Wilson
Mayor of Old Fort
P.O. Box 520
Old Fort, N.C. 28762
Subject Town of Old Fort Wastewater Treatment Plant Expansion
NPDES Permit No. NCO021229
McDowell County
Dear Mr. Wilson:
Your request for speculative effluent limits for the proposed expansion of the Town
of Old Fort WWTP from 0.8 MGD to 1.2 MGD has been completed by the staff of the
Technical Support Branch. In order to receive final permit limits, a formal application will
have to be submitted to the Division's Water Quality Permits and Engineering Unit
Based on available information, the tentative limits for conventional constituents
are:
Summer Winter
Wasteflow (MGD) 1.2 1.2
BOD5 (mg/l) 30 30
NH3-N (mg/1) 3 8
Dissolved Oxygen 5 nr*
TSS (mg/1) 30 30
Fecal Coliform (#/100ml) 200 200
pH (SU) 6-9 6-9
Chlorine (µg/1) 28 28
*nr- no minimum DO required
It should be noted that the tentative NH3-N limits are based on protecting Curtis Creek
against instream toxicity. North Carolina is evaluating all NPDES dischargers for ammonia
toxicity following the Environmental Protection Agency (EPA) guidance to
protect the waters for an instream criteria of 1 mg/l in the summer and 1.8 mg/l in the
winter, under 7Q10 flow conditions.
The Division of Environmental Management (DEM)is now recommending chlorine
limits and dechlorination for all new or expanding dischargers proposing the use of
chlorine for disinfection. An acceptable level of chlorine in your effluent is 28 µg/l to
ensure protection against acute toxicity. The process of chlorination/dechlorination or an
alternate form of disinfection, such as ultraviolet radiation, shorid allow the facility to
comply with the total residual chlorine limit
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

• , J
Letter to Mr. Wilson
page 2
The instream waste concentration (IWC) at the expanded flow of 1.2 MGD is 28%.
A chronic toxicity testing requirement with quarterly monitoring will remain a condition of
the NPDES permit. A complete evaluation of limits and monitoring requirements for
metals and other toxicants will have to be addressed at the time of formal NPDES
application. Information concerning these constituents is not readily available, but the
Town can assume that effluent limits and/or monitoring for cadmium, lead, cyanide,
copper, zinc, chromium, and nickel will be assigned.
DEM is implementing a basinwide water quality management initiative. Our
schedule for the Catawba River Basin is set for 1995. The plan will attempt to address all
sources of point and nonpoint pollutants where deemed necessary to protect or restore
water quality standards. In addressing interaction of sources, wasteload allocations may be
affected Those facilities that already have committed to high levels of treatment technology
are least likely to be affected
This information should provide some assistance in your planning endeavors.
Final NPDES effluent limitations will be determined after a formal permit application has
been submitted to the Division. If there are any additional questions concerning this matter,
please feel free to contact Ruth Swanek or Jackie Nowell of my staff at [phone].
0;,incerely,
61^�
Donald L. aftit, E.
Assistant f for T is Support
cc: Forrest Westall
Mike Waresak, P.E.,McGill Associates
Central Files
WLA File

FACT'SHEET FOR WASTELOAD ALLOCATION
Request# 8050
Facility Name: The Town of Old Fort WWI?
NPDES No.: NC0021229
Type of Waste: 50% Industrial 50% Domestic
Facility Status: Existing .
Pemvt Status: Renewal/ rXpanswIl
Receiving Stream: Curtis Creek
Stream Classification: C-Trout
Subbasin: Catawba 030830
County: McDowell Stream Characteristic:
Regional Office: Asheville USGS # p46MI4 UPute� m�RS
Requestor: Dana Bolden Date: 6/94
Date of Request: 11/4/94 Flow (mgd): 0.8 1.2
Topo Quad: ElONW, Old Fort Drainage Area(mi2): 17 17
Summer 7Q10 (cfs): 4.4 4.9
Winter 7Q10 (cfs): 6.9 7.45
Average Flow (cfs): 27 30.6
30Q2 (cfs): 7.9 10.5
IWC (%): 22 28
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA,etc.)
Reviewed ambient data summary: WQ (based on benthos sampling)in the Catawba River
below the Town of Old Fort has gone from Fair in 1985 to Excellent in 1992. This success story is
due to the finishing plant ceasing its discharge and to the town of Old Fort making improvements
in the quality of its effluent. Facility has passed its WET test consistently since 1990. Updated
model with new flow and wasteflow expansion. DO min is 6.77 mg/I at the discharge point.
Recommend the limits as stated in the speculative letter 6/94. Determined toxicant limits through a ,�N
toxicant analysis. Nave not reviewer/ SMH IeL.
Special Schedule Requirements and additional comments from Reviewers: r'X
Z77
IN. i c,'/i /Vh.tf 1 s Vv
✓ q G / nlqlhV WC f ,�- A
V
Recommended by: / ``�f Date: 11 1��
Reviewed by
Instream Assessment: �lZh Date: ( a!
Regional Supervisor: `1J 04--1 Date 7 V
Permits &Engineering: Date:
RETURN TO TECHNICAL SUPPORT BY: JAN 19 1995

2
CONVENTIONAL PARAMETERS
Existing Limits:
Summer&Winter
Mon Avg Week Avg
Wasteflow (MGD): 0.8
BOD5 (mg/1): 30 45
NH3N (mg/1):
DO(mg/1):
TSS (mg/1): 30 45
Fecal Col. (/100 ml): 200 400
pH (SU): 6-9 6-9
Residual Chlorine (µg/1): 77 115.5
Oil and Grease (mg/l):
TP (mg/1): monitor
TN(mg/1): monitor
Recommended Limits:
Mon Avg Week Avg Mon Avg Week Avg
Wasteflow (MGD): 0.8 1.2
BOD5 (mg/1): 30 45 30 45
N113N (mg/1): 3(s) 8(w)
DO(mg/1):* 5(s)*
TSS (mg/1): 30 45 30 45
Fecal Col. (/100 nil): 200 400 200 400
pH (SU): 6-9 6-9 6-9
Residual Chlorine(µg/l): 77 115.5 28
Oil and Grease (mg/1):
TP (mg/1): monitor monitor
IN(mg/1): monitor monitor
trj ob' MOti I bt, }- C �
*No limit required for winter months J d
LIMIT TO CHANGES TO DUE:
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)

3
TOXICS/METALS
Type of Toxicity Test: Chronic Ceriodaphnia P/F
Existing Limit: P/F @ 22%
Recommended Limit: P/F @ 22%for 0.8 MGD P/F @ 28% for 1.2 MGD
Monitoring Schedule: SEP, DEC, MAR, JUN
Existing Limits
Daily Max.
Cadmium(ug/1): 1.8
Chromium(ug/1): Monitor
Copper(ug/1): Monitor
Nickel (ug/1): Monitor
Lead(ugA): 114
Zinc (ugA): Monitor
Cyanide (ug/1): 23
Recommended Limits
ExIS k4 Max. WQ or EL ExPAYISIOn
Flow (MGD) 0.8 month avg EL 1.2 month avg
Cadmium(ug/1): 1.8 WQ 1.5
Chromium(ug/1): -lvlonitor LIMP Monitor
Copper(ugA): Monitor AL Monitor AL
_ Nickel (ug/1): -Monitor- LIMP Monitor
3f Lead(ug/1): meter—LT`hp Monitor
Zinc(ug/1): Monitor AL Monitor AL
Cyanide (ug/1): 23 �H? WQ 18
'fLeIt 1-es4 muvinnn7 n �12rm1 n)eFhrentwaf i � no limjl is n Je(ESSory lCa� sou✓le b
nnonito+ed- in LTYYl� 6nt.4
Unit changes due to toxicant analysis: The maximum predicted concentrations exceed the allowE
concentrations for cyanide and cadmium and the allowable exceeds the maximum predicted for lead.
_X_ Parameter(s) are water quality limited. For some parameters,the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited,but this discharge may affect future allocations.

1 4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: Cl bUA G�IAc�m y 16ca 1 B1
Downstream Location: PAR k)p-tt) t}i0&aJ1caX D-4- /Yt UV1 - O�G'/Y'{'sCtfuk-
Parameters: " Temp. DUIR(M Cote-4v✓rt,
m G'oylf�oClit/,1^� C'�o� � Ct$laci�e�C)
Special instrea monitoring locations monitoring frequencies:
GA'--,,3(f 'ns en, ;�4 rZae Ju �rP raw�tru�x 6 cu r,' j
MISCELLANEOUS INFORMATION &SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes_ No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (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 it fits into basinwide plan)
Additional Information attached? (Y or N) If yes,explain with attachments.

Facility \Tame _/dW C��l�✓ �i/IV ID _permit # NC&M Z 9 Pipe # U�
CHRUMU I'UXJUI*I'Y t'AJJ/FAIL t'LKNICC"LIMI'l (QR'C'RLY)
The effluent discharge shall at no time exhibit chronic toxicity-using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant morality
is 2Z % (defined as treatment two in the North Carolina T roc:edure document). The permit holder shall perfoml
quarterli monitoring using this procedure to establish compliance with the permit condition. The first test will be
performed after thirty cloys from the effective date of this permit during the months of
i a✓ �uh —• Effluent sampling for this testing shall be performed at the NPDES
permitted final effluent discharge below all treatment processes.
All toxicity testing results required as par of this pctmit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the ux;nth in which it was performed, using the parameter code TGP3B.
Additionally, DEM Form ATA (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemicaUphysical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management 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 and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 —_�--- cfs
Pennitted Flow .__OS__ iMGD Recommended bv:
iWC ZZ %
Basin & Sub-basin �t1L 03083ei
Receiving Stream —&/Zhlclree k - - -
County DowP/1 Date
at l/71/P (l✓J12� PX�G�'l f/dy, Cbi/ �J�PKGI
QCL PlF Version 9191

Facility Name 0fl�k O7 ✓f IUIN�/� Permit Iyeoojl'gzl Pipe# MIL
CHRONIC iOXICIIY PASS/FAIL rERMIT LIR4lh (QK1'KLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant morality
is .fig% (defined as treatment two in the North Carolina procedure document). The permit holder shall perform,
quarterl monitoring using this procedure to establish compliance with the permit condition. The first test will be
performed after thirty da�s from the effective date of this permit during the months of
L m4.+�� �: . Effluent sampling for this testing shall be performed at the NPDES
permitted final effluent discharge below all treatment processes.
All toxic!"; testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring norm (MR-1) for the month in which it was performed, using the parameter code- TGP3B.
Additionally, DEM Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shill be complete and accurate and include all supporting chemical/physical measurements perforated in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement wfll
revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management indicate potential impacts to the receiving stream, this pennit may be re-opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions ,is specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 _ cfs
Permitted Flow __ z.____ MGD Recommended b r
lwc 2S
Basin & Sub-basin
Receiving Stream (ar his (ifet _
County _ Al(1>4kyP/I Date
Iry t n'k e/key Q ll(t- far�����ioh o PX�O�i�fiOh
QCL PIF Version 9191

COLOR REOPENER AND MONITORING REQUIREMENTS
This permit will be revoked and reissued to incorporate color limitations and/or revised
monitoring requirements in the event color testing or other studies conducted by the
pemiittee or the Division indicate that color has rendered or could render the receiving
waters injurious to public health, secondary recreation, aquatic life and wildlife or
adversely affect the palatability of fish, aesthetic quality or impair the water for any
designated use.
Color monitoring should consist of ADMI monitoring as specified below. All samples
taken should have complete descriptive recordings of the color in the sample container
including hue (distinctive characteristics and tint), clarity (clearness of the color sample)
and luminance (brightness or glowing quality) of the sample as it looks in the collection
container. Descriptions of stream color should also be recorded when color samples are
collected.
Color samples should be analyzed as follows:
a) at natural pH
b) free from turbidity (True Color); and
c) Samples shall be analyzed in accordance with the provisions of Method 2120 EA. as
described in the 18th Edition of Standard Methods for the Examination of Water and
Wastewater. Using a narrow-band scanning spectrophotometer to produce a COMPLETE
spectral curve of the visible spectrum (350-75- nm), calculate and report results in ADMI
values for true color values at the sample's ambient pH value. All color data including
visual observations should be submitted with the monthly DMRs.
Color Monitoring Location and Frequencies:
Color Monitoring shall take place instream.above the effluent outfall, downstream below
the effluent outfall and in the effluent.
Frequency shall be 3 consecutive days (preferably Tuesday, Wednesday and Thursday)
once per month.

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© p W TOXICANT ANALYSIS
Parameter= Cyanide i Parameter= Cadmium
Standard= 5' /I Standard= 0.4 /I
n BDL=1/2DL Actual Data RESULTS n BDL=1/2DL Actual Data
1 4 4 Std Dev. 3.25034372 1 0.5 <1
2 4 4 Mean 3.456521739 2 0.5 <1
3 3 3 C.V. 0.940351013 3 28 28
4 2 21 4 1.2 1.2
5 21 21 51 0.5 <1
..........
._.._.._._.._.._.._..
6 1 <2 Mutt Factor=; 2.24: 6 0.5 <1
................._.._..
7 4 4 Max. Value 21 /I 7 0.5 <t
8 5 5 Max. Pred 0A 47.04 jLgA 8 24 24
9 5 5 Allowable Cw 22.7 ggA 9 0.5 <1
10 5 5 10 0.5 <1
11 6 6 11 0.5 <1
12 4 4 12 0.5 <1
13 7 7 131 0.5 <1
14 3 3 14 0.5 <1 /
15 2 2 15 0.5 <1
16 2 2 16 0.5 <1
17 9 9 17 0.5 <1
18 3 3 18 1 1
19 5 51 19 0.51 <1
20 2 2 20 0.5 <1
21 3 3 21 0.5 <1
22 3 3 22 1 1
23 4 4 23 1 1
24 1 <2 24 0.5 <1
25 7 7 25 0.5 <1
26 3 3 261 0.5 <1
27 2 21 27 0.5 <1
28 4 4 28 0.5 <1
29 3 3 29 0.5 <1
30 3 3 30 0.5 <1
31 1 <2 31 1.1 1.1
32 3 3 32 0.5 <t
33 1 <2 33 0.5 <1
34 1 <2 34 0.5 <1
35 1 <2 35 0.5 <1
36 1 <2 36 0.5 <1
37 1 <2 37 0.5 <t I�
IS /, N)oS o ? >�v �✓ U �/l rG� An/�fi1. be,&
lon, 94 If V „
11/28/94 PAGE -

TOXICANT ANALYSIS
;:Parameter= Lead Parameter=
' '.Standard= 25 A Standard=
RESULTS n BDL=1/2DL Actual Data RESULTS n
Std Dev. 4.956 1 50 <100 Std Dev. 9.816 1
Mean 1.592 2 25 <50 Mean 20.66 2
C.V. 3.113 3 25 <50 C.V. 0.475 3
4 25 <501 4
5 25 <50 5
'—'Mult Factor 6 25 <50 Mult Factor= 1_.56 6
= 4.31:
Max. Value 28 /I 7 25 <50 Max. Value 50 A 7
Max. Pred Cw 120.7 1 fLg/1
8 25 <50 Max. Pred Cw 78 Rg/I .::<::._ 8
Allowable Cw 1 8 /I gx
9 25 <50 Allowable Cw 113.7 A 9
10 25 <50 10
11 25 <50 11
12 25 <50 12
13 25 <50 13
14 25 <50 14
15 25 <50 15
16 25 <50 16
17 25 <50 17
18 25 <50 18
19 25 <50 19
20 25 <50 20
EL-Li 25 <50 21
22 25 <50 22
23 25 <50 23
24 25 <50 24
25 3 3 25
26 2 2 26
"'`` 27 2 2 27
28 25 <501 28
29 25 <50 29
30 25 <50 30
31 25 <50 31
32 0.5 <1 32
33 10 10 33
34 6 6 34
35 25 <50 35
36 25 <50i 36
37 251 <50 1 37
11/28/94 PAGE,

TOXICANT ANALYSIS
Copper Parameter= Chromium
7 /I is Standard= ; 50 i /I
BDL=1/2DL Actual Data RESULTS €i n BDL=1/2DL RESULTS
29 29 Std Dev. 52.833 1 Actual Data Std Dev.
63 63 Mean 44.968 2 10 <20 Mean
39 39 C.V. 1.1749 3 35 35 C.V.
127 127 4 10 <20
48 48 5 57 57
18 18 Mult Factor= 3.14 6 10 <20 Mult Factor= Z•�/
23 23 Max. Value 230 /I :.: .:::::_ :; 7 10 <20 Max. Value 7
22 22 Max. Pred Cw 722.2 A 8 10 <20 Max. Pred CIA
i 50.4b�
20 20 Allowable Cw 31.8 A ,...:.. 9 10 <20 Allowable Cw Z 1. 4
54 54 10 10 <20
56 56 11 14 14
17 17 12 7 7
13 13 13 8 8
13 13 14 10 <20
34 34 15 11 11
5 <10 16 9 9
37 37 17 36 36
28 28, 18 10 <20
230 230 19 10 <20
5 <10 20 10 <20
38 38 21 10 <20
21 21 22 10 <20
5 <10 23 10 <20
5 <10 24 10 <20
5 <10 25 4 4
1 <2 26 5 5
3 3 27 5 5
106 106 28 10 <20
130 130 29
159 159 30
40 40 31
32
_ > 33
34
35
36
37
11/28/94 PAGE

TOXICANT ANALYSIS
s; Parameter Nickel :P..arameter= Zinc AL
Standard= 88 /I <Standard= 50
n BDL=1/2DL Actual Data RESULTS n BDL=1/2DL
11.4085 1 25 <50 Std Dev. 17.4222 1 112
13 2 5 <70 Mean 17.125 2 133
0.87758 3 25 <50 C.V. 1.01735 3 196
4 25 <50 4 384
5 5 <10 5 200
2.64 6 5 <10 Mutt Factor= 2.8 6 180
._.._.._.._.._
57 /1 7 5 <10 Max. Value 88 /I;,;.!:; 7 84
150.48 /I =r€ 8 5 <10 Max. Pred C 246.4 /I 8 140
227.4 /Ii 9 5 <10 AllowableCw 400.3 /1-`!i# 9 110
10 25 <50 10 140
11 25 <50 11 150
12 25 <50 12 100
13 5 <10 13 110
14 5 <10 14 150
15 5 <10 15 120
16 50 50 16 71
17 25 <50 17 58
18 5 <10 18 300
19 5 <10 19 97
20 88 88 20 65
21 25 <50 21 89
22 25 <50 22 94
23 25 <50 23 37
24 5 <10 24 60
25 5 <10 1.225 5
26 5 <101 26 5
27 25 <50 27 5
28 25 <50 28 66
29 5 <10 29 99
30 5 <10 30 99
31 5 <10 31 92
32 25 <50 32
33 33
34 34
35 35
36 36
37 37
11/28/94 PAGE�

TOXICANT ANALYSIS
/I h
Actual Data RESULTS
112 Std Dev. 79.1332
133 Mean 114.548
196 C.V. 0.69083
384
200
180 Mult Factor= ' 2.19
84 Max. Value 384 /I
1401 Max. Pred Cw 840.96 /I
110 Allowable Cw 227.4 /I
140
150
100
110
150
120
71
58
300
97
65
89
94
37
60
<10
<10
<10
66
99
99
92
11/28/94 PAGE !

TOXICANT ANALYSIS
Facility Name Town of Old Fort _
NPDES# NCO021229
Ow MGD 1.2 P/Yj'��
7Q 10s cfs 4.9 ��U✓ �16W�
IWC % 27.51
RecVing Stream Curtis Creek
Stream Class C-Trout
FINAL RESULTS
Cyanide
Max. Pred Cw 47.04 /
Allowable Cw 18.2 l�
Cadmium
Max. Pred Cw 120.68
Allowable Cw 1.5
Lead
Max. Pred Cw 78 W1 L T m�'
Allowable Cw 90.9 /' ' /
Copper
Max. Pred Cw 722.2 bl a f}
Allowable Cw 25.4 m
Chromium T
Max. Pred Cw 150.48 m Lr/�t
Allowable Cw 181.7
Nickel rryt f�
Max. Pred Cw 246.4
Allowable Cw 319.8
Zinc AL
Max. Pred Cw 840.96 ` n b I G q L
Allowable Cw 181.7
0
Max. Pred Cw 0
Allowable Cw 0.0
11/28194 PAGE '

TOXICANT ANALYSIS
Facifily Name Town of Old Fort
NPDES/f NC0021229 �QN/
Ow MGD 0.8 � B
7010s cfS „_.._.._.._.._.._.._.._.._.._.._._A.!! 0(d
IWC o 21.99
Reclying Stream Curtis Creek
Stream Class C-Trout
FINAL RESULTS
Cyanide
Max. Pred Cw 47.04
Allowable Cw 22.7 /
Cadmium �/ D
Max. Pred Cw 120.68
Allowable Cw 1.8
Lead
Max. Pred Cw 78 A I
Allowable Cw 113.7
Copper L,
Max. Pred Cw 722.2
Allowable Cw 31.8
Chromium
Max. Pred Cw 150.48 m
Allovable Cw 227.4
Nickel
Max. Pred Cw 246.4 m
Allowable Cw 400.3
Zinc AL
Max. Pred Cw 840.96 J L
Allowable Cw 227.4 m b I e'
0
Max. Pred Cw 0
Allowable Cw 0.0
x
11/28/94 PAGE '