NC0043532_Speculative Limits_19910221

NPDES DOCUMENT !;cANNINO 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:
February 21, 1991
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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]
February 21, 1991
N. C. Dept. Enviro. Health & Nat. Res.
512 N. Salisbury St.
P. 0. Box 27687
Raleigh, N. C. 27611-7687
Subject- NPDES Permit application
Town of Oakboro - Stanly County
NPDES Permit #NC0043532 '
Attention: Mr. Dale Overcash
Dear Mr. Overcash:
k/,,cLAuk.,;
sBOARD OF COMMISSIONERS
CLETUS BURNS. JR.
DAVID L. HEATH. III
ROY F. HELMS
JOE E. LOWDER
MELTON C. SMITH
rr
F EB 2 6 1991
Vic;{m,
In response to your letter of 2-5-91 (copy attached) we wish
to advise you to proceed with our permit request for .5 MGD
discharge to Rocky River.
Upon receiving our requested permit for .5 MGD, we will
begin an environmental assessment to increase the plant
flow to 1.0 MGD.
Thank you, in advance, for your cooperation.
S inceemly,
e--2-et/
Larry Branch
Supervisor Oakboro WWTP

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 George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
February 5, 1991
The Honorable Fetzer E. Hartsell, Mayor
Town of Oakboro
PO Box 610
Oakboro, NC 28129
Subject: NPDES Permit Application
NPDES Permit No. NC0043532
Town of Oakboro
Stanly County
Dear Mayor Hartsell:
Reference is made to your NPDES permit application received July 12, 1990. Per your request,
the proposed effluent limitations for a discharge into the Rocky River rather than into Long Creek are
listed below:
Parameter Final Limitations Units 1
i ' I `'�
Wasteflow 0.5 MGD � . � ?1
BOD5 30.0 mg/1
NH3N no limit mg/1 EB 0 7 j ; +
TSS 30.0 mg/1
Fecal Coliform 200.0 /100 ml T G;i � ` i Pt
i �R� CN pH 6.0 to 9.0 , su 11
Cadmium 11.0 µg/1
Chromium 263.0 µg/1 —
Nickel 463.0 µg/l
. , / Lead 131.0 11g/1
5` Cyanide 26.0 110
( Toxicity Testing Chronic/ Ceriodaphnia - no significant mortality at IWC = 2.6%
Metals limits and the chlorine limit are daily maximums; other limits are monthly averages.
An Environmental Assessment would be required in order to increase the plant flow to 1.0
MGD. Additional limits which would be added would be a summer NH3 as N limit of 15.0 mg/I,
and a summer/winter limit for Total Residual Chlorine of 0.028 mg/1. The toxicity test would remain
a Chronic/Ceriodaphnia - no significant mortality, but the IWC would be 5.1%.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Please note that these are speculative limits and are not binding•unless the limits are part of an
issued NPDES permit. Please notify the Division of Environmental Management by March 4, 1991
if the Town of Oakboro wishes to proceed with the permit application to relocate the discharge. The
flow cannot be increased at this time due to the requirement for an Environmental Assessment. The
project will be returned at the end of the thirty day period unless the Division is notified to proceed
with the permit.
If you have any questions, please contact me at 919/ 733-5083.
Sincerely,
M. Dale Overcash, P.E.
Supervisor, NPDES Permits Group
cc: Mooresville Re Office
`Trevo
Alan Clark
Permit File