NC0065307_technical Correction_20100630

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08ENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
June 30, 2010
Jeff W. Turpin, President
Worsley Operating Corporation
P.O. Box 3227
Wilmington, North Carolina 28403
Subject: Permit Error - Limit Correction
NPDES Permit NC0065307
Scotchman #303 WWTP and WTP
1610 Hwy 421, Wilmington
New Hanover County
Dear Mr. Turpin:
Dee Freeman
Secretary
The Division of Water Quality (DWQ or the Division) concurs with recent comments received on June 29 from
Maureen Jackson regarding your recently issued permit for the subject site. We agree that the permit contains an
error, and we hereby send you permit change -pages.
Please insert these change -pages into your existing permit and discard the old pages. This letter serves to correct
the permit monitoring required at your Outfall 003 for Total Dissolved Solids (TDS) — the limits have been
removed. While TDS monitoring is required statewide for water treatment plants (WTP) using reverse osmosis
(RO) technology, TDS should not be permit limited; it was inadvertently confused with Total Suspended Solids
(TSS). The Division regrets any inconvenience this may have caused you.
If you have further questions, or if we can be of further service, please contact Joe Corporon at
fJoe.CoMoron0ricdenrgovl or call [phone].
Respectfully,
' °p WArFH
r Colleen H. Sullins
Attachments: Permit NCO065307 -permit correction pages c
cc: Central Files [hard copy]
NPDES Program Files [hard copy]
Wilmington Regional Office/Surface Water Protection Section, Attention Kipp Glazier [hard copy]
Maureen Jackson, Environmental Manager [e-copy PDF]
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] \ FAX: 919A07-6492 \ Customer Service:1-877-623-6748
Internet www.nmaterquality.org
Nne
orthCarolina
Natura!!il
An Equal Opportunity 1 Aflinnative Ado Employer

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Permit NCO065307
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 from Outfall 001 (treated domestic wastes). Such discharges shall be limited and
monitored by the Permittee as specified below:
MONITORING
'QIIIRENEIS_
:EFLTTEI\I'�
PCs.S
;
f
CRISTIGS
Parameter
Moiety
(Daily 3
l�Vleasuremenf
_ Saimple
Sample~-
Codes
Avera a
Maximum . '
Fre uenc
T e
Location
Flow
50050
0.004 MGD
Continuous
Recordingwent
or
Effluent
OR and Grease
00556
30.0 mg/L
60.0 mg/L
1/Month
Grab
went and
Effluent
BOD, 5 day 20°C
00310
30.0 m L
45.0 m
1/Week
Grab
Effluent
Total Suspended Solids
00530
30.0 m
45.0 m
1/Week
Grab
Effluent
Total Residual Chlorine 1
50060
13 µg/L
2/Week
Grab
Effluent
NH3 as N
00610
2/Month
Grab
Effluent
Dissolved Oxygen 2
00300
1/Week
Grab
Effluent
Enterococci
61211
35 / 100 mL
276 / 100 mL
1/Week
Grab
Effluent
(geometric mean
Temperature
00010
1/Week
Grab
Effluent
pH
00400
Not < 6.8 nor > 8.5
1/Week
Grab
Effluent
Standard Units
Footnotes:
1. The Permittee shall sample Total Residual Chlorine (TRC) only if chlorine is used to disinfect. Because of difficulties
quantifying TRC in a wastewater matrix, the Division will consider values below 50 µg/L to be compliant with this
permit. However, the Permittee shall continue to submit all values reported by North Carolina -certified laboratory
methods, even if these values fall below 50 µg/L.
2. Dissolved oxygen daily average effluent concentration shall fall below 5.0 mg/L.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (2.) 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 from Outfall 002 (stormwater runoff via an oil & water separator). Such discharges
shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
PCs
PARAMETER
CODES
LI _ Ts
MONITORING
RE UIREMENT _ _
Monthly.`
Avera` e.
Daily
Madnlum .
Measurement
.. Fr_ uenc
SampYe
- e_.'
Sample
L`ocation .
Flow
50050
Instantaneous
Estimate
Effluent
Total Suspended Solids
00530
30.0 m
45.0 m
1/Week
Grab
Effluent
Dissolved Oxygeni
00300
l/Week
Grab
Effluent
Oil and Grease
00556
30.0 Tf,/4
60.0 m
1/Month
Grab
Effluent
Temperature
00010
1/Week
Grab
Effluent
pH2
O0400
Not < 6.8 nor > 8.5
Standard Units
1/Week
Grab
Effluent
1) Daily average effluent dissolved oxygen concentration shall not fall below 5.0 mg/L.

Permit NCO065307
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning 12 months after the permit effective date, and lasting until expiration, the
Permittee is authorized to discharge from Outfall 003 (RO wastewater). Such discharges shall be
limited and monitored by the Permittee as specified below:
LFFLUENT
. C`HARACTER�ISTICS
_
PC S
Parameter
. �'
Codes . _ :
LIMITS._
_
1V[U k4RiNGRE; ITItEMFN'rS
_ thly
Mon
,Average_
Daily
�1Vlazimum ,
j f
11leasurement
. ire uenc
_ ..
Saimple` -
T ype
..
Sample
! Zocaion. _
Flow
50050
Instantaneous
Estimate
Effluent
Temperature
00010
1/Month
Grab
Effluent
Total Dissolved Solids
70296
1/Month
Grab
Effluent
Dissolved Oxygen 1
00300
1/Month
Grab
Effluent
Conductivity
00094
1/Month
Grab
Effluent
Turbidity
00076
1/Month
Grab
Effluent
Salinity
00480
1
1/Month
Grab
Effluent
H
00400
Not < 6.8 nor >
8.5 Standard Units
1/Month
Grab
Effluent
Total Chloride
00947
1/Month
Grab
Effluent
TRC 2
50060
13 µg/L
1/Month
Grab
Effluent
Total Arsenic
01002
1/Month
Grab
Effluent
Total Copper
01042
1/Quarter
Grab
Effluent
Total Iron
00980
1/ uarter
Grab
Effluent
Total Manganese
01055
1/Quarter
Grab
Effluent
Total Fluoride
00300
1/Quarter
Grab
Effluent
Total Zinc
01092
1/Quarter
Grab
Effluent
Ammonia M3 as N
C0610
1/Quarter
Grab
Effluent
Acute Toxicity 3
22414
1/Quarter
Grab
Effluent
Footnotes:
1. Dissolved Oxygen: daily average effluent concentration shall not fall below 5.0 mg/L.
2. The Permittee shall sample Total Residual Chlorine (TRC) only if chlorine is used by the facility. Because of
difficulties quantifying TRC in a wastewater matrix, the Division will consider any value below 50 µg/L to be
compliant with this permit. The Permittee shall submit all values reported by North Carolina -certified laboratory
methods, even if these values fall below 50 µg/L.
3. Acute Toxicity (Fathead Minnow 24-hour) No Significant Mortality @ 90%; January, April, July, and October,
See Special Condition A. (5.).
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (4.) PERMIT RE -OPENER: TMDL IMPLEMENTATION
The Division may, upon written notification to the permittee, re -open this permit in order to
incorporate or modify effluent limitations, monitoring and reporting requirements, and other
permit conditions when it deems such action is necessary to implement a parameter -specific
Total Maximum Daily Load (TMDL) approved by the USEPA.