NC0043532_Permit (Modification)_19900514

NPDES DOCIMENT !MANNINO COVER SHEET
NPDES Permit:
NC0043532
West Stanly / Oakboro WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
(Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
May 14, 1990
This document is printed on reuse paper - ignore any
content on the reYerse side

State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary
The Honorable Fetzer E. Hartsell, Mayor
Town of Oakboro
PO Box 610
Oakboro, NC 28129
May 14, 1990
George T. Everett, Ph. D.
Director
6 r
i
July 0 5 1990
Subject: Modification to NPDES
Permit No. NC0043532
Town of Oakboro
Stanly County
Dear Mayor Hartsell:
The Division of Environmental Management has reviewed your letter dated April 2, 1990
concerning the toxicity requirement in the subject permit. In your letter you requested that the town
be granted a one year delay in the effective date of the subject permit's toxicity limitation. The
' DEM respectively offers the following comments on the request.
The Town of Oakboro has already had an interim toxicity monitoring requirement contained
in its NPDES permit since February 1989. Also, the United States Geological Survey (USGS)
has recently recalculated the 7Q10 of the receiving stream, Long Creek, such that the instream
waste concentration of the subject facility is now 19%. Prior to this flow assessment, the receiving
stream was considered a zero flow stream which caused the subject facility to have an instream
waste concentration of 100%. The current chronic toxicity test is based upon the 19% instream
waste concentration, which should be easier for the town to meet. Therefore, your request to delay
the toxicity limit for one year and your request to modify the language in Condition I of the subject
permit are hereby denied.
If this decision is unacceptable to you, you have the right to an adjudicatory hearing upon
written request within thirty (30) days following receipt of the final permit. The request must be in
the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes,
and filed with the Office of Administrative Hearings, Post Office Drawer 11666, Raleigh, North
Carolina, 27604. Unless such a demand is made, this decision shall be final and binding.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

If you have any questions concerning this permit, please contact Mr. Dale Overcash at
telephone number [phone].
cc: Central Files
Mooresville Regional Office
Technical- Suppo
Mr. Jim Patrick, EPA

Division of Environmental Management
April 10, 1990
MEMORANDUM
To: Dale Overcash
Through: Ken Eagleson V.yl��
Larry Ansley li�
From: Matt Matthews (ArA
Subject: Town of Oakboro WWTP Draft Permit
NC0043532
This is in reference to an April 2 letter(see attachment) from the Town of Oakboro requesting a change in the whole effluent
toxicity testing language in its draft permit. The town requests a year of toxicity monitoring prior to implementation of a chronic
toxicity limit. The Town has had an interim permit monitoring requirement since February of 1989 under its present permit.
Therefore, it is recommended that the whole effluent toxicity language remain unchanged in the draft permit. Additionally, the
USGS has recently recalculated the 7Q10 of the receiving stream(Long Creek) such that the instream waste concentration of the
facility is now 19%. Prior to the flow assessment, the creek was considered a zero flow stream with the facility having a resulting
instream waste concentration of 100%. Though the facility has consistently failed its chronic toxicity monitoring tests at 99%, the
Town has presented no evidence that the facility's waste will exhibit toxicity at the new effluent concentration of 19%.
Richard Bridgeman of the Mooresville Regional Office have been consulted concerning this matter and concurs with the above
assessment.
If further information is required, please call me at [phone].
Attachment.
cc: Carla Sanderson, Technical Support Branch
Richard Bridgeman, Mooresville Regional Office

%eY0.J71.-
MAYOR
FETZER E. HARTSELL
CLERK
HELEN AUSTIN
CHIEF OF POLICE
JACK C. THOMAS
TOWN OF OAKBORO
P. O. Box 610
OAKBORO, NORTH CAROLINA 28129
TELEPHONE: [phone]
April 2, 1990
Mr. Dale Overcash
Permits and Engineering Unit
N.C. Division of Environmental Management
P.O. Box 27687
Raleigh, NC 27611
Re: NPDES Permit No. NC0043532
Town of Oakboro Wastewater Treatment Plant
Dear Mr. Overcash:
BOARD OF COMMISSIONERS
CLETUS BURNS, JR.
MITZI C. HARWOOD
OAVID L. HEATH, III
ROY M. HINSON
SEYMORE WHITLEY
ECEV
APR U 4.1990
PERMITS & ENGINEERING
We have reviewed the draft copy of our new NPDES Permit and request
modifications to the requirements stated in Condition I regarding effluent
toxicity limitations. We request (1) a delay of toxicity limitations for a
period of one year, as it was in our current permit, while we continue our
toxicity reduction efforts and (2) the usage of the wording contained in
Attachment A for Condition I of our permit.
We are aware of other municipalities that have identical toxicity
requirements to those stated in Attachment A and feel it only fair that we
be given similar requirements. We appreciate your cooperation in this
matter.
Please contact me with your response to this request.
Very truly yours,
TOWN OF OAKBORO
rdh
Enclosure
cc: George Everett
etzer E. Hartsell
Mayor

Attachment A
I. (1) On a quarterly basis commencing , 1990, and for a
period of one year thereafter, the permittee shall conduct chronic toxicity
testing using the procedures outlined in the current or subsequent versions
of the North Carolina Ceriodaphnia chronic effluent bioassay
procedure --(North Carolina Chronic Bioassay Procedure, Revised, September,
1989) at an effluent concentration of 19% (defined as treatment two in the
North Carolina Procedure document). Effluent sampling for this testing
shall be performed at the NPDES permitted final effluent discharge -below
all treatment process.
All toxicity testing results obtained as a result of this permit condition
will be entered on the Effluent Discharge Monitoring Form (MR-1) for the
month in which the test was performed, using the parameter code TGP3B.
Additionally, DEM Form AT-1 (original) will be sent to the following
address:
Environmental Sciences Branch
North Carolina Division of Environmental Management
P.O. Box 27687
Raleigh, NC 27611-7687
Test data shall be complete and accurate and shall include all supporting
chemical/physical measurements performed in association with the toxicity
tests, as well as all dose/response data. Total residual chlorine must be
measured and reported if employed for disinfection of waste stream.
Failure to achieve the test conditions as specified in the cited document,
such as minimum control organism survival or inappropriate environmental
controls, shall invalidate the testing and require retesting. Failure to
submit suitable test results in compliance with the requirement of this
Permit shall constitute a failure of permit conditions, and shall require
retesting.
Should any test data from this monitoring requirement, or from testing
performed by the North Carolina Division of Environmental Management,
indicate chronic toxicity or other consistent adverse impacts, caused to
the receiving stream by the presence of toxic substances in permittee's
effluent, or should new sources of industrial process wastewater be
discharged to the permittee's system, this permit may be reopened and
modified to include alternate monitoring requirements.

(2) From and after , 1991, the permittee shall continue to
comply with the monitoring and testing requirements prescribed in subpart
(1), above, and as the same may be modified from time to time to meet the
requirements set out hereinafter in this subpart (2).
Beginning , 1991, the permittee's effluent discharge shall not
exhibit chronic toxicity, indicated by at least two (2) consecutive test
procedures performed as required hereunder, and caused by the presence in
its effluent of any "toxic substance" (as defined in Title 15, Subchapter
2B of the North Carolina Administrative Code). Potential effluent•toxicity
shall be determined using the test procedures outlined in the current or
subsequent versions of the North Carolina Chronic Bioassay Procedure,
(Revised, February, 1987), at an effluent concentration of 19% (defined as
treatment two in the North Carolina Procedure document).
Failure to achieve the test conditions as specified in the cited document,
such as minimum control organism survival or inappropriate environmental
controls, shall invalidate the testing and require retesting. Failure to
submit suitable test results in compliance with the requirements of this
Permit shall constitute a failure of permit conditions, and shall require
retesting.
Should the test results from any quarterly procedure required under this
monitoring requirement indicate a failure, permittee shall immediately
commence and continue monthly monitoring and testing until such time that a
single test is passed. Upon passing a subsequent monthly test, the monthly
monitoring requirement hereunder shall revert to the quarterly requirement.
Should the results of any monitoring and two consecutive tests required
under subpart (2) of this Paragraph I, or from testing performed by the
North Carolina Division of Environmental Management, indicate the potential
for chronic toxicity or other consistent adverse impacts, caused to the
receiving stream by the presence of any toxic substance in the permittee's
effluent, or should new sources of industrial process wastewater be
discharged to the permittee's system, this permit may be reopened and
modified to include alternate monitoring requirements; or, the permittee
shall be required to comply with the provisions of any special Order by
consent the North Carolina Division of Environmental Management and
permittee shall execute respecting further testing requirements and/or
whole effluent toxicity limitations. During the period of any special
order by consent and provided the permittee is in compliance with the terms
of the special order by consent, the permittee shall not be deemed to have
violated the terms and conditions of Paragraph I of this Permit.

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0043532
PERMITTEE NAME:
Town of Oakboro
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 0.500 MGD
Domestic (% of Flow): 40 %
Industrial (% of Flow): 60 %
Comments:
See attached letter from the Town of Oakboro stating modification
requests.
RECEIVING STREAM: Long Creek
Class: C
Sub -Basin: 03-07-13
Reference USGS Quad: G 17NE (please attach)
County: Stanly
Regional Office: Mooresville Regional Office
Previous Exp. Date: 8/31/93 Treatment Plant Class: Class II
Classification changes within three miles:
no change within three miles
Requested by:
Lula Harris
Prepared by: CiLtidik,
Reviewed by:
Date: 1/8/90
Dater( ( fQ�
Date:•
— r
Modeler
Date Rec.
#
CM.S
tIglao
Ss,1-2—
Drainage Area (mi2 ) (q a.. 6 Avg. Streamflow (cfs): I$3• 6
7Q10 (cfs) 3. 3 Winter 7Q10 (cfs)Z. 2 30Q2 (cfs) V.'7
Toxicity Limits: IWC ) 9 % Acute hronic
Instream Monitoring:
Parameters a o .) 1 airtioj Ca-1 V)14 ("6-1,46,4-7h 0
Y7.
Upstream \/ Location (.IDOVP di5C.h. p.
Downstream y Location h nt )riJs(..-e 5R I91 / 7
Effluent
Characteristics
MO/1. Ave.
Dt.1. tnA,X.
BOD5 (mg/1)
Jo
NH3-N (mg/1)
D.O. (mg/1)
6
I 1712.7
L -‘ 'g i
TSS (mg/1)
n
,..5 0 I
F. Col. (/100 ml)
,D U
pH (SU)
_ Gi
Caciw u a /veil)
)1
ahvowLiuruL,,•1)
JL03
Al,c14_11 (v)-11
q63
Lead (ucf)
131
Cc ..vui'dr(ui►)
a(./
Comments: ReCOWri 2nd (f4 uevta- r itn4,4
Co ff , Z/'r1C, 5i7.

Request No.: 5542
WASTELOAD ALLOCATION APPROVAL FORM
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Quad:
Town of Oakboro
NC0043532
40% Domestic / 60%
Existing
Modification
Long Creek
C
030713
Stanly
MRO _
Lula Harris
1/9/90
G17NE
WWTP
Industrial
Drainage area: 192.50 sq mi
Summer 7Q10: 3.30 cfs
Winter 7Q10: 5.80 cfs
Average flow: 183.00 cfs
30Q2: 8.70 cfs
RECOMMENDED EFFLUENT LIMITS
Proposed Limits
Mon Ave Dal Max
Wasteflow (mgd) : 0.50
BOD5 (mg/1) : 30
NH3N (mg/1) :
DO (mg/1) :
TSS (mg/1) :
pH (su) :
Fecal Coliform (/100m1):
Cadmium (ug/1) :
Chromium (ug/1) :
Nickel (ug/1) :
Lead (ug/1):
Cyanide (ug/1) :
Toxicity Testing Req.:
6
30
Existing Limits
Mon Ave
0.50
30
6
30
6-9 6-9
200
11"Pr_RMITS & ENGINEERING1000
2631
463
131
26
Chronic/Ceriodaphnia/Quarterly
Upstream (Y/N): y
Downstream (Y/N) : y
MONITORING
IS.CEIVED
b281990
Location: above discharge point
Location: Below discharge at SR 1917
COMMENTS
Recommend instream monitoring for DO, temperature, fecal coliform, and
conductivity. Recommend effluent monitoring for copper, zinc, and silver.
Facility requested modification of their permit for limits to reflect
change in 7Q10. Metals limits and toxicity testing requirement will
change.
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
gtz,.,(__
RETURN TO TECHNICAL SERVICES BY:
Date: /4-/g0
71 / 3/9 0
Date:
Date: aI as-1,4b
Date: 2/2-StA,
¶A

10/89
Facility Name 7w�. erf C&k oo� WwTP
Permit # ) iCOO 4353
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
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 mortality is M % (defined as treatment two in the North Carolina procedure
document). The permit holder shall perform quarterly monitoring using this procedure to establish
compliance with the permit condition. The first test will be performed after thirty days from
issuance of this permit during the months of Th.it, Apr, ) l . Effluent
sampling for this testing shall be performed at the NPDES permitted finareffluent discharge below
all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (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
P.O. Box 27687
Raleigh, N.C. 27611
Test data shall be complete and accurate and include all supporting chemical/physical 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 3.3 cfs
Permited Flow 0.5
IWC% /q
Basin & Sub -basin 03010
Receiving Stream Lo CreetiditA,e1-.)
County ./cIt� Date c4 J/ 1 - ' b
**Chronic Toxicity (Ceriodaphnia) P/F at 11 %,J4h,AprA Av , See Part 3 , Condition- .
MGD Recommended by:

3110796
Facility: Town of Oakboro
NPDES Permit No.: NC0043532
Status (E, P, or M): E
Permitted Flow: 0.50 mgd
Actual Average Flow: 0.28 mgd
Subbasin: 30713.00
Receiving Stream: Long Creek
Stream Classification: C
7010: 3.30 cfs
INC: 19.0 %
PRETREATMENT DATA EFFLUENT DATA ---
ACTUAL ACTUAL PERMITTED
or Ind. + Ind. + ) ACTUAL ACTUAL
Default ACTUAL Domestic PERMITTED Domestic I Maximum Weekly
Standard Acute 1 Removal Allowable Domestic Industrial Total Industrial Total I Daily Average
Pollutant AL Criteria 1 Eff. Load Load Load Load Load Load 1 Value Value
(ug/1) (ug/1) 1 % (#/d) (#/d) (#/d) (t/d) (#/d) (#/d) 1 (ug/1) (ug/1)
Cadmium S 2.0 1.79 1 92% 0.50 0.00 0.01 0.01 0.50 0.500
Chromium S 50.0 984 1 76% 4.20 0.06 0.10 0.16 3.75 3.810
Copper AL 7.0 9.2 1 82% 0.78 0.08 0.41 0.49 3.00 3.080
Nickel S 88.0 789 1 32% 2.61 0.03 0.09 0.12 1.25 1.280
Lead S 25.0 34 1 81% 2.65 0.06 0.14 0.20 1.75 1.810
Zinc AL 50.0 65 1 77% 4.38 0.22 0.21 0.43 7.51 7.730
Cyanide S 5.0 22.0 1 59% 0.25 0.05 0.02 0.07 0.18 0.230
Mercury S 0.012 2.4 1 0.00
Silver AL 0.060 1.2 1 94% 0.02 0.01
Selenium S 5.0 20 1 80% 0.50
Arsenic S 50.0 360 1 80% 5.04
Phenols S NA I
ANALYSIS RESULTS
Monitor / Limit / Special Condition*
10.00
20.00
400.00
50.00
100.00
420.00
14.00
10.00
Allowable Allowable) Predicted Predicted 1
Effluent Effluent 1 on ACTUAL on PERMIT. Actual Actual 1 INSTREAM MONITORING
Bkg 1 Conc. Conc. 1 Influent Influent 1 ACTUAL PERMITTED Daily Max. Wk. Avg. 1 Based on Based on
Pollutant Conc. 1 CHRONIC ACUTE 1 Data Data 1 Influent Influent Effluent Effluent 1 Actual Actual
(ug/1) 1 (ug/1) (ug/1) 1 (ug/1) (ug/1) 1 Loading Loading Data Data 1 Daily Max. Wk. Avg.
Cadmium S 1 10.516 aV5 9.412 1 0.338 16.878 1 Monitor Limit Limit 1 Monitor
Chromium S 1 262.903 5175.618 1 16.304 385.826 1 Monitor Limit Monitor 1
Copper AL 1 36.806 3 48.479 I 37.140 233.926 1 Monitor Monitor Special 1 Monitor
Nickel S 1 462.710 at, 4148.613 1 34.431 367.260 1 Monitor Limit Limit 1
Lead S 1 131.452 0\ 177.617 1 16.034 145.107 1 Limit Limit Limit 1 Monitor
Zinc AL 1 262.903 U 341.985 1 41.439 750.175 1 Monitor Monitor Special 1 Monitor
Cyanide S I 26.290 115.677 1 12.110 39.789 1 Limit Limit Limit 1
Mercury S 1 0.063 12.619 1 0.000 0.000 1 I
Silver AL 1 0.315 6.467 1 0.000 0.000 1 Special 1 Monitor
Selenium 5 1 26.290 105.161 1 0.000 0.000 1 I
Arsenic S 1 262.903 1892.903 1 0.000 0.000 1 I
Phenols S 1 0.000 0.000 1 0.000 0.000 1 I
Gyva-Lo AIDWA-OLP Cce4 (HO- fo/N)
Q d nc.i.o rK- ° 1 a✓ c-c)
0.hvarx,,'urn
CoP,Q e,, i a-, C rtn;ot-t
° i a

TJ&in Oro
AID: a mid .
406)0 Donti5Ac Ltryt, emt
1�70.��.dust.ad 44wJ 7Ald r41yrxcu�e-r`'
6,l0 ludo 0
41.260 ,eon rxed€ -= .3 c�
d�- ve
5frat.-ntec,a (AA,.p.o. ox-(.4
nw,`f3 GP4td 7A ld
7010-3.3 asW;-77 c,S - . a?
""K.Qii Cu) ae.31-.775)4f/ - (g., *tL/f75
etu rsrtsA
S
/jjUl tai4 eto - s- .- -f' - 775 1-g "(i)/7 5-
CM -A
Rc f .1,, tit qvt20
,',yam -IAA( Le(..”o5itee)/06-4-4
.,� � 2v �
z(tfiv oa,tiAt LAA- c,t4 ,ea4 --- tyuy
riollie.141-v44-0eca.PA-v
) 7�
cell matv-e

WHOLE EFFLUEN
FACILITY
:ICTIY TESTING 0(SELF-MONITORING SUMMARY] Mon, Ian 15, 1990
NATIONAL SPINNING CO: 103
NPDESN: NC0001627
County: BEAUFORT Region WARO
PF:1.75
7Q10:TIDAL IWC(%):
RPOU)RFMENT
PERMR'ACUTE LIMIT:NO ACUTE (FFHD)
Bogie 8/1/88 R y., ,. Q P/F
Menthe: FEB MAY AUG NOV
SOC/JOC Req:
SOO4/88-12/88(OR REISSNCE)Q AC 24HR FIN
YEAR IAN
'86
'87
'88 -
'89 -
'90
NEUVILLE MOBIL SOX
NPDESN: NC0045004
County: BURKE
PF: 0.0120
7010: 0.083 IWC(%);18.29
Region: MRO
OFF LINE
Be gin 0000/03 liogoency D
Months:
SOC/JOC Req:
Y '86 18.99
'87
'88
'89
'90
NEW BERN WWTP
NPDESN: NC17025348
County: CRAVEN Region WARO
PF:4.00
7Q10:TIDAL [WC(%):
NEW HANOVER CO. LANDFILL
NPDESN: NC0049743
County: NEW HANOVER Region WIRO
PF: 0.05
7Q10:27.0 IWC(%) 0.28
PERMIT ACUTE LIMITNO ACUTE (FTHD)
Bogin:7/1/88 R ,t" .,. Q P/F
Months: APR JUL NOV JAN
SOC/JOC Roq:
JOC:6/88-4/91 24 HR AC FTHD Q(3,6,9,12)
PERMIT ACUTE LIMITNO ACUTE (DAPHN)
Begin: I1/1/88 Any,.....,. Q P/F
Menthe: MAR JUN SEP DEC
SOC/JOC Roq:
'86
'87-
'88 (2l )
'89 FAIL
'90
V '86 -
'87 -
'88 -
'89 -
90
NEW MINETJETEXTILES
NPDESN: NC0034235
County: CLEVEIAND Region: ARO
PF: 0.625
7010: 0.22 IWC(%):67.29
NEWTON WWTP
NPDESN: N00036196
County: CATAWBA Region:MRO
PF:5.00
7010:6.0 IWC(%):5632
PBRMrr:Monit Ac 10/91JC hV 78%-1/92,then P/P
Begin:10/1/89 Pmgoancy: M,Q P/F&
Months: MAR JUN SEP DEC
SOC/30C Req:
SOC 4/89-5/90:48HR ACUTE MONIT M, FLOW .45 MOD
LETTER CHRONIC TARGET:56%
Begin: 6/1/88 Frego®cT.. Q P/F
Murtha: JUN SEP DEC MAR
SOC/30C Roq:
V '86 41
'87 79
'88 66.4•
'89 P20•
'90
'86
'87 -
'88 NONE"
'89 FAIL
'90
NORTHERNTELEO M-001
NPDESN: NC0045101
County: WAKE
PF: 0.01
7Q10:OA IWC(%):100.0
Region RRO
LETTER ACUTE TAROET:SIGNIFMORT REDUCTION
Begin 1 W1/89 Fregoeny. M
Months:
SOC/JOC Req:
'86
.87
'88
'89 -
'90
NORWOOD WW1?
NPDESN: NO3321628
County: STANLY
PP:0.75
7010: 42.0 IWC(%):2.68
Region: MRO
PERMIT CHRONIC L1MIT:2.7%
Begin: 8/1/87 I1.y...,,,.,. Q PIF
Months: MAR JUN SEP DEC
SOCp0C Req:
'86
'87 -
'88 -
'89 -
'90
OAKBORO W WIP PERMIT CHRONIC MONITORING:99%, LIMIT 9)89
NPDESN: NC0043532 Been:2/U89 f1.qw,..ey. Q P/P
County: STANLEY Region: MRO Months: JAN APR JUL OCT
PP: 0.50 SOC/J0C Req:
7 Q 10: 0.00 I W C(96 ):100.00
'86
'87
'88 -
'89 FAIL
90
OCCIDENTAL CHEMICAL CORP
NPDESN: NC0003875
County: NEW HANOVER Region: WIRO
PP: 0.747
7 Q 10:15.0 I W C(%):7.15
LETTER CHRONIC TARGET:7.0%
Begun 8/1/88 Pmcluener Q P/P
Months: FEB MAY AUG NOV
SOC/JOC Req:
'86 -
'87 26.72
'88 25.49
'89 -
'90
NONEf
NO- NE(
(P40)
- 33.2" -
72 32,35 54
6953 70" 64.91
15" 46.9" P25"
NONE' P20" NONE"
PIS• NONE* PASS
PASS NR -
(bt)
PASS
PA- SS
FAIL
NR
FA- IL
bt FA- IL
47.66 49.9 42
53 . 26.4 PASS
PASS - -
19
72.25
NR
NONE*
PA- SS
(PASS)
NO- NEf
IUL AUG SEP
(F200 PASSf
PASSf
42
5.8
7.9
PASS('
P1- 0
NONE(
P20 - - FA- IL(
93
90"
42,65•
P40"
FAIL
NR
FA- IL
bt PAIL
53.95
29.2
PASS
PASS
36 NR P20
81.66" 74.4 >90'
48.9' 81.3" 66.4"
P19" NON.P35• NONE"
PAIL
NONE'
FA- IL
OCT NOV DEC
(34)
73my
42my
4.3/55
>90'
>66.0"
NONE*
NONE" 5.87
PASS -
PIS
( NR) FAIL FAIL
(PASS) NR -
NR - -
PAIL
FAIL FAIL FAIL
PAIL - PAIL -
PA- SS(
40my
PASS(
NR
24.9
69 37
NONE" 57.2•
P20" NONE'
NONE"
>90" NONE"
LATE
FAIL
NR
30.89 39.59 45.66"
48 43 44
PASS PASS PASS
PASS
(PASS)
29my 26.01 36.72
31 41.25 41.59
- - PASS
- - PASS
0 2 consecutive Mures . significant noncompliance Y 1985 data available
LEGEND:
PP=Permittd flow (MGD),7Q10=Roceiving stream low flow criterion (cfa), IWC%=Imnc*m waste concentration, Begin=First month required, Prequcncy .(Monibting 6.4 y): (Q-Quorum ; M-Monthly; BM -Bimonthly; SA-Scmiarmually, A -Annually;
OWD.Only when discharging; D-Diaconti nod monitoring requbemenE IS -Conducting independent study), P/F-Psas/Fail chronic bioassay. AcaAcate, Chrd7unr ic, A=quarterly monitoring increases to monthly upon single failure,
(Dan Notation): (f=Fathead Minnow, •=(`sriodaplmia sp., my>,Mysid shrimp, ChV.Cltronicvalue, P.Mottility of stated percentage at highest cateentration, atePerformed by DEM AgTox Group, bt.Bad test],
(fig Notation): [-.Data not required, NR=Not reported, ( )=Begbm'utg of Quarter), (Faeaity Actival"Stama): [I.Inactive, N•New1y Issne, To corxtrnct), H.Active bat not discharging)
NR
28.28
32.22
27

0361 C3
(SION OF ENVIRONMENTAL MANAGEMENT WQUALITY FIELD -LAB FOR .z (DM1
VTY �4 W. Y1 1
BASIN
'RT TO: ARO FRO Rd RRO WaRO WIRO WSRO TS
,ed by: Bus(Courier. Staff. Other
i'
ECTOR(S): -•-- C•. v • 0 0b
gated BOD Range: 0-5/5-25/25-65/40-130 or 100 plus
Yes 0 No ❑ Chlorinated: Yes ❑ No ❑
PRIORITY
El AMBIENT ❑ QA
COMPLIANCE ❑ CHAIN
OF CUSTODY
❑ EMERGENCY
1
SAMPLE T E
❑ STREA
❑ LAKE
❑ ESTUA
STATION LOCATION:) ki r 0
V
REMARKS:
For Lab Use ONLY
Lab -Number: C.k.J
1 r�--� ,, r,
(. cf-
,
Date'1Peceived:
-3
it •
e
c - j -
Time: ,
Ree'A :
From: Bus:Courier-Hand Deli
DATA ENTRY BY:
�(
CK: 4-
DATE •i PORTED:
/6
'( is '
.41
Ca
on #)`
JC•v:c'-f3S'42
1
2
3
4
5
6
7
8
9
0
Date Begin (yy/mm/dd)
BOD5 310 mg/1 '
COD High 340 mg/I
COD Low 335 mg/I
Coliform: MF Fecal 31616 / / ' G /100m1
Coliform: MF Total 31504 /100m1
Coliform: Tube Fecal 31615 /100m1
Coliform: Fecal Strep 31673 /100m1
Residue: Total 500
mg/1
Volatile 505 mg/I
Fixed 510 mg/1
i1
.2
3
:4
15
16
t7
t8
;9
Residue: Suspended 530 mg/1
Volatile 535
mg/I
Fixed 540 mg/I
pH 403 units
Acidity to pH 4.5 436 mg/1
Acidity to pH 8.3 435 mg/I
Alkalinity to pH 8.3 415 mg/1
Alkalinity to pH 4.5 410 mg/1
TOC 680
Turbidity 76
mg/I
NTU
Time Begin
Date End
Time End
Chloride 940
mg/I
Ch1 a: Tri 32217
ug/I
Chi a: Corr 32209
ug/I
Pheophytin a 32213
ug/I
Color: True 80
-
Pt -Co
Color:(pH ) 83
ADMI
Color: pH 7.6 82
ADMI
X
Cyanide 720 , /
mg/1
Fluoride 951
•
Formaldehyde 71880
T"
mg/I
Grease and Oils 556
Hardness Total 900
mg/1
Specific Cond. 95
hos/cm2
MBAS 38260
mg/I
X.
' \
Phenols 32730
«
ug/1
Sulfate 945
mg/1
Sulfide 745 , 0.
1
mg/I
Dep ` DM DB DBM
Value Type
A H L
asN610
mg/1
as N 625
i
mg/1
N • plus NO3 as N 630
mg/I
P: p • ta1 as P 665
mg/1
' as P 70507
mg/I
P:' • • lved as P 666
mg/1
dmium 1027
ug/1
omium:Total1034
ug/1
0.! •' , . - 1042
ug/I
. r ickel 1067
d
ug/1
.4 � P .. d 1051
ug/I
•-' nc 1092
ug/1
•
liver 1077
ug/1
uminum 1105
ug/1
ryilium 1012
ug/I
C,: [ alcium 916
mg/I
C `• obalt 1037
ug/1
F ., on 1045
ug/1
Composite
T S B
Sample T
itspi
C GNXX
LI-Lithium 1132 ug/1
MeMagnesium 927 mg/I
Mn-Manganese 1055 ug/1
Na-Sodium 929 mg/I
Arsenic:Total 1002 ug/1
Se -Selenium 1147 ug/1
Hg-Mercury 71900 ug/1
Organochlorine Pesticides
Otg nophospborus Pesticides
Acid Herbicides
Base/ Neutral Extractable Organics
Acid Extractable Organics
Purgeable Organics (VOA bottle reg'd)
Phytoplankton
Aug Paint S
Conductance at 25 C
94
Water Temperature 1C)
10
D.O. mg/1
300 I•
pH
400 I•
, kalinity
pH 8.3 , s r, pH 4.5
7 .1
82244 _-- 431
Acidity
pH 4.5 pH 8.3
82243 182242
Alt Temperature IC)
20
Salinity %
• 480
Precipition On/day)
45
Cloud Cover %
32
Wind Direction (Deg)
36
Stream Flow - ,`: Turbidity Severity
c
1351 ' . ; 1350
Wind Velocity M/H
35
Mean Stream Depth ft.
Stream Width ft.
4
_64
%Revised 10/86

ISION OF ENVIRONMENTAL MANAGEMENT WO QUALITY FIELD -LAB FOR (DM1)
NTY ` A h _ -
PRIORITY SAMPLE T E
R BASIN
:RT TO: ARO FRO 6IR01RRO WaRO WIRO WSRO TS
M
r
oed by: BustCouriej..` Staff, Othere`}^
_J . • 1 ,••� ^+
.ECTOR(S):
hated BOD Range: 0-
Yes ❑ N
on #
/VCCvw.S
25-65/40-130 or 100 plus
Chlorinated: YesK No ❑
❑AMBIENT 11 QA ❑ STRE s'S EFFLUENT
� a
ZCOMPL1ANCE ❑ CHAIN 0 LAKE 1. O�T
OF CUSTODY = a is
D EMERGENCY '❑ ESTU > ,� ' '
A to
1-4 Z 0� �
.____
STATION LOCATION: 0),Ak16..,0 , .) i j , . n (•
r'1
t
%yla ueA H.Type L -�`j
'�
i
REMARKS:
Date Begin (yy/mm/dd)
1
/`
2
3
4
5
6
SODS 310 LI mg/I
COD High 340 mg/I
COD Low 335
mg/I
Coliform: MF Fecal 31616 /100m1
Coliform: MF Total 31504 /100m1
Coliform: Tube Fecal 31615 /100m1
7
8
9
10
11
i2
.3
14
15
16
17
Coliform: Fecal Strep 31673 /100m1
Residue: Total 500
mg/I
Volatile 505 mg/I
Fixed 510 mg/I
Residue: Suspended 530 /
mg/1
Volatile 535
mg/I
Fixed 540 mg/1
pH 403 units
Acidity to pH 4.5 436 mg/I
Acidity to pH 8.3 435 mg/1
Alkalinity to pH 8.3 415 mg/1
18
19
Z0
Alkalinity to pH 4.5 410 mg/1
TOC 680 mg/I
Turbidity 76 NTU
Time Begin Date End
1A10 Rn9 r27
Time End
1200
Chloride 940
mg/I
Chl a: Tri 32217
ug/1
Chl a: Corr 32209
ug/1 '
Pheophytin a 32213
ug/1
Color: True 80
Pt -Co
Color:(pH ) 83
ADMI
Color: pH 7.6 82
ADMI
Cyanide 720
mg/1
Fluoride 951
11/1-
Formaldehyde 71880
mg/I
Grease and Oils 556
rsl-
Hardness Total 900
mg/1
Specific Cond. 95
2
Ofhos/cm
XMBAS
38260
Os A
mg/1
Phenols 32730
ug/1
Sulfate 945
mg/1
Sulfide 745
mg/I
`,r ,.:
De • . DM 1 131/1.01
U ,..
•
1
For Lab Use ONLY
Lab Number: ( J (.' J • Q / C)
Date Receivea I
?C.) ' (..) Time:
Rec'd b
From: Bus Course -Hand Del
.DATA ENTRY BY
! CK: -,
ATE REPORTED:
?
;• asN610 3s,
mg/1
as N 625 3
mg/I
x
N., N. plus NO3 as 630 • ' y
mg/1
X'
F. otal as P 665 51 (
mg/I
• ' :_ as P 70507
rag/1
P:' ; issolved as P 666
mg/1
r•... mlum 1027. ' 0
ugh
,�
w.: omiuni Total 1034 `2
ug/1
S r • pper 1042 / 5
ug/I
'x
N ; : ickel 1067 .•C ';
ug/1
P • d 1051 a< to
ug/1
, :A nc 1092 / l
I
ug/1
i-
}{
Y;- liver 1077 .[ 05
ug/1
• '
uminum 1105
ug/1
Ilium 1012
ug/I
alcium 916
mg/1
C C.
obalt 1037
ug/1
F
ron 1045
uen
Co osite
L.i/ S B
Sam a Type
C G GNXX
Li -Lithium 1132 ug/1
.Mg
-Magnesium 927 mg/I
Mn-Manganese 1055 ug/I i
Na-Sodium 929 mg/I
Arsenir~Total 1002 ut1/1
Se -Selenium 1147 ug/I
Hg-Mercury 71900 ug/1
.Organochlorine
Pesticides
Organophospborus PPadcides
Add Herbicides
Base/ Neutral Extractable Organics
Acid Extractable Organics
Purgeable Organics (VOA bottle reg'd)
Phytoplankton
pling Point X
Conductance at 25 C
94
Salinity %
480
Water Temperature (C)
10
Precipition On/day)
45
D.O. mg/1
300 1
•
Cloud Cover R
32
PH
400 1•
Wind Direction (Deg)
36
pH8.3
82244
Stream Flow `
•
1351
IkaIinity
pH 4.5
431
Turbidity Severity
1350
pH 4.5
82243
Acidity!
8.3
182242
Wind Velocity M/H
35
64
Stream Depth ft.
Air Temperature SO
20
Stream Width ft.
4
/Revised 10/86

ta
r
State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Govemor R. Paul Wilms
William W. Cobey, Jr., Secretary January 10, 1990 Director
Mr. Frank A Rankin, III, PE, RLS
Concord Engineering & Surveying, Inc.
45 Spring Street SW
Concord, North Carolina 28025
Subject: Revised Wasteload Allocation
for the Town of Oakboro WWTP.
NPDES Permit No. NC0043532
Stanly County
Dear Mr. Rankin,
I am responding to your letter to the Division dated November 22, 1989, request-
ing a revised wasteload allocation (WLA) for the Town of Oakboro's discharge
into Long Creek based upon revised United States Geological Survey (USGS) flow
estimates for Long Creek. Our records corroborate that the USGS revised the
flow estimates on Long Creek in May, 1989, to reflect a positive (3.3 cfs) 7Q10
on Long Creek above Norfolk Southern Railroad (Oakboro's discharge location).
Previous WLA analyses have been based on a 7Q10 flow equal to zero.
You will need to submit a formal NPDES permit modification request and required
fee in order to modify your NPDES permit to reflect this change in information.
However, so that you may make an informed decision as to whether you wish to
pursue this option, my staff have put together the following summary of the
changes that would be recommended:
Monthly Average Daily Maximum
Wasteflow (MGD) 0.5
GODS (mg/1) 30
DO (mg/1) 6
TSS (17g/1) 30
Fecal Coliform (/100 ml) 200
pH (SU) 6-9
Cadmium (ug/1) 11
Chromium (ug/1) 263
Nickel (ug/1) 463
Lead (ug/1) 131
Cyanide (ug/1) 26
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Effluent monitoring will continue to be required for copper, zinc, and silver.
The chronic toxicity limit in your NPDES permit will also change to reflect the
lower instream waste concentration (IWC) of 19 percent.
Let me take this opportunity to inform you that the Division is concerned about
the relatively high concentrations of copper and silver being discharged by the
Town. Based upon North Carolina's action levels for these parameters (15 NCAC
2B.0211 (b)(4)), your target effluent concentrations to avoid action level
exceedances are 37 ug/1 and 0.315 ug/1 for copper and silver, respectively. All
of your self -monitoring data, except for one observation, for the past twelve
months, indicate that these targets are being exceeded. Dependent on the out-
come of your whole -effluent toxicity tests at the revised IWC, your current
monitoring requirements may be revised to effluent limitations. In addition,
instream monitoring for these constituents may be required.
I hope this information is helpful to you in making your decision whether to
pursue permit modification. If you have any questions, please contact Mr. Don
Safrit of our Permit and Engineering Unit, or myself at [phone].
Sincerely,
J
C-4-11
J revor Clements, Asst. Chief
charge of the
Technical Support Branch
cc: Don Safrit
Rex Gleason
Central Files

CONcepRD
ENGINEERING &
SURVEYING, INC.
(it-e.vrl
November. 22, 1989
North Carolina Department of Environment
Health and Natural Resources
Division of Environmental Management
P. 0. Box 27687
Raleigh, N. C. 27611-7687
Attention: Dennis Ramsey
Assistant Chief Operations Branch
Re: Stream Flow Estimate (7Q10) for
Town of Oakboro NPDES #NC0043532
Dear. Mr. Ramsey:
Nl.)V
NOV 20 {gg;
PEPVIT-
Mayor Hartsell with the Town of Oakboro has contacted me regarding
wasteload allocation studies the state has performed for this permit.
Specifically his concern was that the state was using a 7Q10 stream flow of
0 CFS for this site.
I contacted Carla Sanderson with your department and she informed me that
she had a copy of a U.S.G.S. stream flow analysis for station #0212512207
dated February 1988 showing a 7Q10 of 0 CFS. She suggested I contact Mr.
Curtis Gunther with U.S.G.S.
Mr. Gunther's files showed. that U.S.G.S. had performed a revised stream
flow analysis of this site on May 31st 1989. A copy of this revised
analysis is attached.
NCSS • NSPS • ACSM • NSPE • NCPE
45 Spring Street, S.W. • Concord, North Carolina 28025 • Concord - [phone] • Charlotte - [phone] • Fax - [phone]

North Carol..i.na Department of Environment
Health and Natural Resources
November 22, 1989
Page 2
I am providing this information to help facilitate the process of
determining an accurate and equitable wasteload allocation for this stream
at this site.
I look forward to your response.
Sincerely,
CONCGINEERING & SURVEYING, INC.
Frank A. Rankin, III, PE, RLS
FAR/se
cc:
Mayor Hartsell
Don Safrit, Permits & Engineering
Trevor Clements, Tech Support
Richard Bridgeman, Mooresville Regional Office

TAKE
IDEIN
United States Department of the Interior AM
GEOLOGICAL SURVEY
Water Resources Division
Post Office Box 2857
Raleigh, North Carolina 27602
November 20, 1989
Mr. Alex Rankin
Concord Engineering & Surveying
45 Spring Street SW
Concord, North Carolina 28025
Dear Mr. Rankin:
In accordance with your telephone conversation with Mrs. Fogleman, your
request for a copy of the corrected low -flow data that had been furnished to
the State for Long C ab NSRR nr Oakboro, NC (0212512207) is attached.
The U.S. Geological Survey does not have site -specific data for this site.
The statistics that are provided on the attached sheet have been computed by
correlating with the runoff characteristics of the nearest gaged streams.
They reflect natural streamflow conditions, and do not account for the
effects of any diversion or regulation that may be present.
These data are preliminary and subject to revision pending approval for
publication by the Director of the Survey, and are made available through
our cooperative program of water -resources investigations with the North
Carolina Department of Environment, Health, and Natural Resources.
If you have any questions regarding this information, please contact us.
Sincerely,
er/e72-X¢
H. Curtis Gunter
Hydrologist
Enclosure
cc: Mr. John N. Morris, Director
Division of Water Resources
North Carolina Department of
Environment, Health, and Natural Resources
Raleigh, NC 27611
A. E. Fogleman, WRD, Raleigh, NC
HCG/wlg

TOXICS REVIEW 12/29/89
ver 3.0
Facility: Town of Oakboro WWTP
NPDES Permit No.: NC0O43532
Status (E, P, or M): E
Permitted Flow: 0.50 mgd
Actual Average Flow: 0.28 mgd
Subbasin: 30713.00
Receiving Stream: Long Creek
Stream Classification: c
7Q1O: 3.30 cfs
IWC: 19.0 4
PRETREATMENT DATA EFFLUENT DATA==..
ACTUAL ACTUAL PERMITTED 1 I
or Ind. + Ind. + 1 ACTUAL ACTUAL I
Default ACTUAL Domestic PERMITTED Domestic 1 Maximum Weekly 1
Standard Acute 1 Removal Allowable Domestic Industrial Total Industrial Total 1 Daily Average 1
Pollutant AL Criteria 1 Eff. Load Load Load Load Load Load 1 Value Value 1
(ug/1) (ug/1) 1 4 (#/d) (t/d) (#/d) (#/d) (#/d) (#/d) 1 (ug/1) (ug/l) 1
Cadmium S 2.0 1.79 1 92% 0.50 0.00 0.01 0.01 0.50 0.500
Chromium S 50.0 984 1 76% 4.20 0.06 0.10 0.16 3.75 3.813
Copper AL 7.0 9.2 1 82% 0.78 0.08 0.41 0.49 3.00 3.082
Nickel S 88.0 789 1 32% 2.61 0.03 0.09 0.12 1.25 1.281
Lead S 25.0 34 1 81% 2.65 0.06 0.14 0.20 1.75 1.811
Zinc AL 50.0 65 1 77% 4.38 0.22 0.21 0.43 7.51 7.726
Cyanide S 5.0 22.0 1 59% 0.25 0.05 0.02 0.07 0.18 0.225
Mercury S 0.012 2.4 1 86% 0.00
Silver AL 0.060 1.2 1 94% 0.02 0.01
Selenium S 5.0 20 1 80% 0.50
Arsenic S 50.0 360 1 80% 5.04
Phenols S NA
ANALYSIS RESULTS
I I Monitor / Limit / Special Condition*
I Allowable Allowable) Predicted Predicted (
I Effluent Effluent 1 on ACTUAL on PERMIT. I Actual Actual 1 INSTREAM MONITORING
Bkg 1 Conc. Conc. 1 Influent Influent 1 ACTUAL PERMITTED Daily Max. Wk. Avg. 1 Based on Based on
Pollutant Conc. 1 CHRONIC ACUTE 1 Data Data 1 Influent Influent Effluent Effluent 1 Actual Actual
(ug/1) 1 (ug/l) (ug/l) 1 (ug/1) (ug/1) 1 Loading Loading Data Data 1 Daily Max. Wk. Avg.
10.00
20.00
310.00
50.00
100.00
330.00
7.00
10.00
23.00
Cadmium S 1 10.516 9.412 1 0.338 16.864 1 Monitor Limit Limit 1 Monitor
Chromium S 1 262.903 5175.618 1 16.310 386.266 1 Monitor Limit Monitor (
Copper AL 1 36.806 48.479 1 37.153 234.160 1 Monitor Monitor Special 1 Monitor
Nickel S 1 462.710 4148.613 1 34.443 367.677 ( Monitor Limit Limit 1
Lead S 1 131.452 177.617 1 16.040 145.238 1 Limit Limit Limit 1 Monitor
Zinc AL 1 262.903 341.985 1 41.454 750.051 1 Monitor Monitor Special 1 Monitor
Cyanide S 1 26.290 115.677 1 12.114 38.938 1 Limit Limit Limit
Mercury S 1 0.063 12.619 1 0.000 0.000 1 I
Silver AL 1 0.315 6.467 1 0.000 0.000 1 Special ( Monitor
Selenium S 1 26.290 105.161 1 0.000 0.000 1
Arsenic S 1 262.903 1892.903 1 0.000 0.000 1 I
Phenols S 1 0.000 0.000 1 0.000 0.000 1 Limit 1 Monitor
( - e t(,e d ota .t-fnh n r 4 yes -(0004-- Jo/sii
n5-fu (km& ntoNa.-tar; ptc); � - L,cceacLA L vx.(l-f- 0 kto co./. ix, Sam
Co pP-cn wab It C 9rc . 1 44vtio
00a(A .. ;rxi4 0 4n4 e 1 a�
.tixcu 6ta wadze a-4Zotte I a--
i 1 uln , 4cur,(4 A.LLo) ;LG )l ,1-Gnu 13�

4,69' - 10
NPDFS PRETREAVYIFMT INFORMATION REQUEST FORM
FACILITY NAME: Taolt Pt of b (j01 P NPDES NO. NCO° 4 3,23 a..
REQUESTER: (r/ ,4.40;& 0),A. DATE: 1 / a\$/ Fi REGION: r,1421D
PERMIT CONDITIONS COVERING PRETREATMENT
This facility has no SIUs and should not have pretreatment language.
This facility should and/or is developing a pretreatment program.
Please include the following conditions:
Program Development
Phase I due / /
Phase II due /
Additional Conditions
(attached)
This facility is currently implementing a pretreatment program.
Please include the following conditions:
Program Implementation
Additional Conditions
(attached)
IQ IFICANT INDUSTRIAL USERS' (SIUs) QJNTRIAUTIONS
SIU FLOW - '1b1'AL:
-
6
T1•:X'1 T i
V `0 � METAL FINISHING OTHER:
lE› 11)I�
PE12.s+ i Imo/ Acm At_
O. 3 .astir
0.3
MGD
MD
MGD
Ma)
HEADWORKS REVIEW
PARAMETER
Cd
Cr
Cu
Ni
Pb
Zn
CN
Phenol
Other t)
� h Peg" t T' - A Ls o-n-rrcE L.D C_A-L- L" 113
RECEIVED: i s / a9 / 89 REVIEWED BY: G.e.00.43
'P/ THRou6H DAILY MAD IN LBS/DAY
ALJ BLE D IZC PEN1ITITD Aj L
w Rc
o.Sa o -* o.100 Sa O.olo
4.3q 0.06 -k 3."'S3 D./O/
0.0g 3.00a O.go?
I.s3 0.03 -V I.ACI ©Aq
a.4,f 0.06 * 1./5i 0•14
6_ AZ A 4-. 50e 0, ,ao'4
O. a S 0.65 A o .13-S 0. Oa
6.95 0.01
based on cuir¢.1/4+ Sewer (A6e Oret lokevte¢ L.oca( 1.:1•14. -NOT- L(mit(Ts 7.)tREc IO
cot cL t e Lowezez)
tiDomEs-
RETURNED: 1a/a9/y 11c." 1h
11i 1•1CK(-
SEVE QA-L-
YsAoh7 45

-FeK-h .
Iof oo01
0.3
Fermi 0-e
039
5( (k ha5 V [oia.TecQ0-tiobo if m ref' JaiA -SIGN
serM.t arih.uu../ reP) fie Po TA) cs neo-{��- � 14ew
l -f '�. a_-% w. R.5 s n e e eJ woo-le-5 w h e.m seµ
[Naas
he co peJtie, Ko/ yeCe eeo"
PO A) -f- 5 (u a co'..ot c&c -{z s id (yes

Y15`�'t p l l�yt fic,ic
lowA
Lp5416J d; srf-
li1.w‘i
cutcutt 1 e up Lvktv1),e coJ
.�g9 i7.� 79-7 07) % &G)3
A?ci ob.(6.6)4 dog
h9 ,217 6. 2 (5.7) ��� ,355
1/ 5 ,..)(s 5 Cc . S)('"-3
a1.tt 0.0)Db`I\ 5z.
%ri /0. 3 (q) 95
Ari 9, s 16.3 N5P` t3,41f
%ci (1o.(1.11 173
1/1g (s-S 143 (l)-4) )01
118q 13-9 q-S 9° .265
I d7
Fadj
Fet,j 05,8 1,51166) 22i
reui a'] (. 6� .3)
ass �.g (c) c947
Fe 7t 6-5 (,) 054i
.2.3. 2- S.36 (7.5) 583
rA rG.5 8. s (.i) 3a')
) 0.3 16.4 (q.3) l 0�
7,5 ) 6.5 0.0 b276
LA 11.7 (/.2) aot
(I(-6) (u�
12.a- lo,( 69-.))
Ncoou 353 P-
g b ridit aw 5/ 13S dris-h
%7rktio (/i 4)
1- g q � C$a) a5-c

a
1/10
Discharger
Receiving Stream :
MODEL RESULTS
TOWN OF OAKBORO WWTP
LONG CREEK
SUMMER
MODEL RUN WITH EXISTING LIMITS
AND NEW 7Q10
The End D.O. is 5.99
The End CBOD is 9.73
The End NBOD is 11.28
mg/l.
mg/l.
mg/1.
sec moo/ lam-
t;rmi-15 g.)4tito 47Q160
Segment 1
Reach 1
Reach 2
DO Min
WLA
CBOD
(mg/1) Milepoint Reach # (mg/1)
4.42
0.65 1
60.00
0.00
WLA
NBOD
(mg/1)
90.00
0.00
WLA
DO Waste Flow
(mg/1) (mgd)
6.00
0.00
0.50000
0.00000

*** MODEL SUMMARY DATA ***
Discharger : TOWN OF OAKBORO WWTP Subbasin : 030713
Receiving Stream : LONG CREEK Stream Class: C
Summer 7Q10 : 3.3 Winter 7Q10 : 5.8
Design Temperature: 26.
ILENGTHI SLOPEI VELOCITY 1 DEPTHI Kd 1 Kd 1 Ka 1 Ka 1 KN 1
I mile I ft/mil fps I ft Idesign l @20% Idesign l @20% Idesignl
Segment 1
Reach 1
1 1 1 1 1 1 1 I
0.651 7.701 0.104 1 1.62 1 0.28 1 0.21 1 1.65 1 1.441 0.48
1 1 1 1 1 1 1 1 I
Segment 1 1 1.151 16.701 0.132 1 1.45 1 0.30 1 0.23 1 4.52 I 3.971 0.48
Reach 2 1 1 1 1 1 1 1 1 I
I Flow 1 CBOD I NBOD I D.O. I
I cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste I 0.775 1 60.000 190.000 I 6.000
Headwaters) 3.300 I 2.000 I 1.000 I 7.300
Tributary 1 0.000 1 2.000 1 1.000 1 7.300
* Runoff 1 0.070 1 2.000 1 1.000 1 7.300
Segment 1 Reach 2
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary I 0.000 1 2.000 1 1.000 1 7.300
* Runoff I 0.070 I 2.000 1 1.000 1 7.300
* Runoff flow is in cfs/mile

Seg # I Reach # I Seg Mi I D.O.
1 1 0.00 7.05
1 1 0.05 6.76
1 1 0.10 6.48
1 1 0.15 6.22
1 1 0.20 5.98
1 1 0.25 5.75
1 1 0.30 5.54
1 1 0.35 5.34
1 1 0.40 5.16
1 1 0.45 4.98
1 1 0.50 4.83
1 1 0.55 4.68
1 1 0.60 4.54
1 1 0.65 4.42
1 2 0.65 4.42
1 2 0.70 4.55
1 2 0.75 4.68
1 2 0.80 4.80
1 2 0.85 4.91
1 2 0.90 5.01
1 2 0.95 5.10
1 2 1.00 5.18
1 2 1.05 5.26
1 2 1.10 5.33
1 2 1.15 5.40
1 2 1.20 5.46
1 2 1.25 5.52
1 2 1.30 5.58
1 2 1.35 5.63
1 2 1.40 5.68
1 2 1.45 5.72
1 2 1.50 5.77
1 2 1.55 5.81
1 2 1.60 5.85
1 2 1.65 5.88
1 2 1.70 5.92
1 2 1.75 5.95
1 2 1.80 5.99
Seg # I Reach # I Seg Mi I D.O.
CBOD I
13.03
12.91
12.80
12.69
12.57
12.46
12.35
12.24
12.13
12.02
11.92
11.81
11.71
11.60
11.60
11.51
11.43
11.34
11.25
11.17
11.08
11.00
10.91
10.83
10.75
10.67
10.58
10.50
10.42
10.34
10.27
10.19
10.11
10.03
9.96
9.88
9.81
9.73
CBOD I
SUMMER
MODEL RUN WITH EXISTING LIMITS
AND NEW 7Q10
NBOD I Flow I
17.93 4.08
17.66 4.08
17.40 4.08
17.15 4.09
16.90 4.09
16.65 4.09
16.41 4.10
16.17 4.10
15.93 4.10
15.70 4.11
15.47 4.11
15.24 4.11
15.02 4.12
14.80 4.12
14.80 4.12
14.62 4.12
14.45 4.13
14.28 4.13
14.11 4.13
13.95 4.14
13.78 4.14
13.62 4.14
13.46 4.15
13.31 4.15
13.15 4.16
12.99 4.16
12.84 4.16
12.69 4.17
12.54 4.17
12.40 4.17
12.25 4.18
12.11 4.18
11.96 4.18
11.82 4.19
11.69 4.19
11.55 4.19
11.41 4.20
11.28 4.20
NBOD I Flow I

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