NC0086291_Technical Correction_20150410

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Ms. Anne -Marie Knighton, Town Manager
Town of Edenton
P.O. Box 300
Edenton, NC 27932
Dear Ms. Knighton:
Donald R. van der Vaart
Secretary
April 10, 2015
Subject: Change -Page to Correct Error
NPDES Permit NCO086291
Beaver Hill WTP
Chowan County
The Division of Water Resources (the Division) became aware of an error in your recently issued permit (October
15, 2014). According to our water treatment plant permitting strategy, Total Nitrogen (TN) and Total Phosphorous
(TP) monitoring is quarterly.
Accordingly, we hereby forward the modified permit pages to amend your permit changing TN and TP monitoring
to quarterly. Please insert these change pages into your existing permit and discard the old pages. We regret any
inconvenience this causes your organization.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to
obtain other permits which may be required by the Division of Water Resources or any other Federal, State, or
Local governmental permits that may be required.
If you have questions, or if we can be of further service, please contact Derek Denard at
[[e-mail]] or call [phone].
espe ly,
Zimmerman,
Direct
Division of Water Resourc s, t ENR
Enclosure: NPDES Permit NCO086291 (Corrected Pages)
he: Central Files
NPDES Program Files
WaRO Files/ Attn: David May
cc: Aquatic Toxicology Unit, Susan Meadows [[e-mail]]
Robert Bullock [[e-mail]]
Scott Vinson [[e-mail]]
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncwaterqualit .org
An Equal Opportunity 1 Affirmative Action Employer— Made in pal by recycled paper

NPDES Permit NCO086291
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash via Outfall 001. Such discharges shall be limited
and monitored' by the Permittee as specified below:
1u rk...
,... , ....: ...
[P�4RA•1t��: CODESJ.
T� y.
t
���—•.roc. �.
Lii =C {. I Imm
� .
easurement.Sa`mpe r dimple
�� -.`�-
ueAcy - �- a Location
- . -`
,,•w: .. ;...'
A�i►e�
a se;
g
�'. ',...-..
Dail
�....i y,
4[axagamareq
3
Flow GD
50050
2/Month
3
Instantaneous
E
Total Residual Chlorine 4 (
50060
17 4
2/Month
Grab
E
pH (su)
00400
Not < 6.or 9.0
standarr d units
2/Month
Grab
E
Total Suspended Solids (TSS) (mg/L)
C0530
30.0 mg/L
45.0 mg/L
2/Month
Grab
E
Total Dissolved Solids (TDS) (mg/L)
70295
Monthly
Grab
E
Turbidity (NM
00070
Monthly
Grab
E
Temperature (°C)
00010
Monthly
Grab
E
Dissolved Oxygen (DO) (mg/L)
00300
Monthly
Grab
E
Salinity (ppt)
00480
Monthly
Grab
E
Conductivity (umhos/cm)
00094
Monthly
Grab
E
Total Copper (µg/L)
01042
Monthly
Grab
E
Total Chloride (mg/L)
00940
Monthly
Grab
E
Total Manganese (µg/L)
01055
Monthly
Grab
E
Total Zinc (µg/L)
01092
Monthly
Grab
E
Total Fluoride (mg/L)
00951
Monthly
Grab
E
Ammonia Nitrogen (NH3) (mg/L)
C0610
Monthly
Grab
E
Total Nitrogen (mg/L)
C0600
Quarterly
Grab
E
Total Phosphorus (mg/L)
C0665
Quarterly
Grab
E
Chronic WET Testing 5
TGP3B
Quarterly
Grab
E
pH (su)
00400
Monthly
Grab
U & D
Temperature (°C)
00010
Monthly
Grab
U & D
Dissolved Oxygen (DO) (mg/L)
00300
Monthly
Grab
U & D
Salinity (ppt)
00480
Monthly
Grab
U & D
Conductivity (umhos/cm)
00094
Monthly
Grab
U & D
Footnotes:
1. No later than 270 days from the effective date of this permit, begin submitting discharge monitoring
reports electronically using NC DWR's eDMR application system. See Special Condition A. (3.).
2. E = Effluent; I = Influent; U = upstream at least 50 feet from the outfall; D = downstream at least
100 feet from the outfall.
3. For instantaneous flow monitoring, the duration of the discharge must be reported in addition to the
total flow.
Page 3 of 8

NPDES Permit NCO086291
4. The Division shall consider TRC effluent values reported below 50 µg/L to be compliant with the
permit. However, the Permittee shall continue to record and submit all values reported by a North
Carolina -certified test method (including field certified), even if these values fall below 50µg/L.
5. Whole Effluent Toxicity (WET) testing - testing of Ceriodaphnia dubia shall be performed as 7-day
pass/fail test at 90% effluent concentration, during January, April, July and October [See A. (2.)].
Samples shall be taken at the outfall but prior to mixing with the receiving waters.
There shall be no discharge of floating solids or foam in other than trace amounts.
Page 4 of 8