NC0073181_Permit Modification_19960614

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Jim Dubose
Exxon Chemical Corporation
c/o Paktank Corporation
2000 West Loop South, Suite 2200
Houton, Texas 77027
Dear Mr. Dubose:
AIX.XA
[DEHPsi R
June 14, 1996
Subject: NPDES Permit Modification
Permit No. NCO073181
South Wilmington Terminal
New Hanover County
On May 31, 1996 the Division of Environmental Management issued NPDES Permit No.
NCO073181 to Exxon Chemical Corporation for their South Wilmington, North .Carolina site. A
review of the permit file has indicated that an error was inadvertently made in the permit.
Accordingly, we are forwarding herewith a modification to the subject permit to correct the
error. This permit modification is to the map. The modification corrects the location of the
discharge point.
Please find enclosed an amended map which should be inserted into your permit. The old map
should be discarded. All other terms and conditions contained in the original permit remain
unchanged and in full effect. These permit modifications are issued pursuant to the requirements
of North Carolina General Statutes 143-215.1 and the Memorandum of Agreement between
North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit
modification are unacceptable to you, you have the right to an adjudicatory hearing upon written
request within thirty (30) days following receipt of this letter. This 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 27447, Raleigh, North
Carolina 27611-7447. Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit modification, please contact Mr. Mark
McIntire at telephone number [phone], extension 553.
Sincerely,
-�A. Preston Howard, Jr/., P.E.
cc. Mooresville Regional office
Central Files
Permits and Engineering Files / Permit File
Facility Assessment Unit
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

ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD. HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE C=300= UNIMPROVED ROAD
Latitude 34010'43" Longitude 78057'16"
Map # K27NW Sub -basin 03-06-17
Stream Class Sc
Discharge Class Stormwater
Receiving Stream Cape Fear River
Design Q episodic Permit expires 6/3; /01
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SCALE 1:24 000
0 1 MILE
0 7000 FEET
.......... . ... ....... .........
1 0 1 KILOMETER
CONTOUR INTERVAL 5 FEET
QUAD LOCATION Exxon Chemical
NCO073181
New Hanover County
Terminal Tank Facility

[Fwd: More on PRAM's]
Subject: [Fwd: More on PRAM's]
Date: Fri, 02 Nov 2001 11:26:29 -0500
From: Jeanne Phillips <[e-mail]>
To: Charles Weaver <[e-mail]>
7'e, k 4 N
dc
Charles,
I have been working on a list of invalid parameter codes to find a valid
PCS code to convert the DMR data to. I need your help with varsol or
can you point me to someone who can help with a better description for
Mike? Mike Donehoo with EPA Region IV is helping with the codes that I
couldn't find in the PCS approved list. We had one permit with varsol,
NC0073181. I did find the limits page with varsol down in Central
Files. I'll bring that to you.
Thanks,
Jeanne
-------- Original Message --------
Subject: More on PRAM's
Date: Fri, 02 Nov 2001 08:36:23 -0500
From: [e-mail]
To: [e-mail]
Hello.again,
What unit codes do you use with 00765, and which side of the DMR do you
use them on?
Also, a problem. In STORET, 78925 = Naphtha. There is no code in
either PCS or STORET called Varsol. Tell me more about this stuff and
I'll see if I can dig out or create a code for you.
Thanks,
Mike
------------------------------
------------------------------
Mike Donehoo
PCS Manager
US EPA Region 4
404-562-9745 Voice
404-562-9728 Fax
[e-mail]
1 of 1 11 /5/2001 9:49 AM

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Oct 9 '01 8:30
NCDENR-DWQ ---> 88326813888
No.
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Mode
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State of North-Carglina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr. Division of Environmental Management Jonathan B. Howes
Governor Water Quality Section Secretary
FEBRUARY 14, 1996
Mr. Jim DuBose
EXXON Chemical Company
2000 West Loop South, Suite 2200
Houston, Texas 77027
Subject: Additional Information Request
EXXON South Wilmington Terminal
NPDES Permit No. NCO073181 (Renewal)
New Hanover County
Dear Mr. DuBose:
The EXXON South Wilmington Terminal operates a wastewater
treatment system with permitted discharge to the Cape Fear River in
Wilmington. The system includes oil/water separator(s) that allow
gravity flow of treated water into a 2.5 acre pond that contains an
effluent weir and valved piping for staged discharge activities.
Typically, the pond does not discharge. The writer's guess is that
discharges are via infiltration through the pond dike and into the
river, depending upon tidal conditions. This region gets more
rainfall than evapotranspiration. A permit renewal inspection was
performed at the facility on January 25, 1996. The writer observed
a light bluish sheen on a portion of the pond and noticed apparent
groundwater inflow into the pond via gravity wastewater piping.
There is not a requirement to monitor effluent water quality
parameters defined within the NPDES permit if there are no
discharge activities. This lack of a monitoring database makes
permit renewal difficult concerning future monitoring requirements.
Specifically, should monitoring be devised based upon hydrocarbon
solvents within the current inventory or should monitoring address
products that may have been stored in the past that could be
effecting the treatment pond. The 1993 permit renewal activity
prompted a permit condition to test pond water for parameters
listed on the permit (no concentration limits to be applied). The
permit condition is presented as a footnote to the Effluent
Limitations and Monitoring Requirements chart and an excerpt is
enclosed. This testing was to have been performed in June and
December if no pond discharge activity occurred. The writer can not
locate this monitoring data within Regional Office Files. It will
be necessary to review the information prior to finalizing the
permit for the next five year cycle.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Jim DuBose
February 15, 1996
Page Two
r •M
c'
J
Please provide a copy of the testing results to my attention
on or before March 15, 1996 to allow a prompt permit renewal. You
will notice that I have provided a copy of this request letter to
the Terminal Manager, Mr. Alfred Sme-ilus.
If you have questions concerning this request, or would like
to provide some comments, please contact me at [phone].
Sincerely,
im Bushardt, P.E.
Environmental Engineer
JB:EXXON3.296
cc: Alfred Smeilus (Paktank)
Paul Clark (P&E)
Wilmington Files
Central Files
i

TIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NCO073181
A. ().EFFLUENT L1M1TA
During die period beginning on die effective date of the permit and lasting until expiration, the Pemuttee is authorized to discharge from
oulfall(s) serial number 001. Such discharges shall be limited and monitored by die permittee as specified below:
Dlscharcie Llmliallons VMonitoring Requirements
Effluent Characteristics t bs/dav units (specify) Measurement Sample •Sample
Frequency Type Location
Mon Avg. Daily Max Mon. Avg. Daily Max. * Grab E
Flow
Oil and Grease
TSS ,
Acute `Toxicity"'
Benzenb;
Toluene
Xylene -
Tbrbidity
Lead
Ethylbenzene
45.0 mg/I
45.0 mg/l
2/Month Grab E
2/Month Grab
• . • • Grab
• • • • Grab
Grab
• • • • Grab
2/Month Grab
• • • • Grab
• • • • Grab
* • • • Grab
Varsol
#Total now shall be reported as a monthly average and shall be die average of any and all discharge events.
E
*Sample Locations: E - Effluent
Samples taken in compliance with the monitoring requirements specified above shall betaken at the following location(s): the nearest
accessible point after final treatment but prior to actual discharge to or mixing with tie receiving waters.
Monitoring will be conducted during normal work hours. The facility shall record title approximate time the discharge begins and stops during
a discharge period.
storm water runuCC unconuiuhinated by any industrial or commercial activity and not
This Pemmit imposes no limitation on the discharge of
discharged through any oil/water separator or other treatment equipment or facility.
**The discharge shall not cause die turbidity of die receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural
background conditions, die discharge level cannot cause any increase in the turbidity in the receiving water.
***Acute Toxicity (Fathead Minnow, 24 how' static test) Monitoring, Episodic, See Part Ill, Condition F.
CONTINUED...

Permit No. NCO073181
""Monitoring should correspond with toxicity test sample collection during the first five discrete discharge events after/during
a rain event, and annually thereafter.
BTEX and MBTE shall be tested using an EPA approved method to 1 ppb detection.
If no discharge occurs during the first six months of the year, the permittee should sample for the above referenced parameters at
the pond during late June. Likewise, if there is no discharge during the last six months of the year, a sample should be collected
at the pond during late December.
The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units and shall be monitored 2/month at the effluent
by grab samples.
t�
`j I There shall be no discharge of floating solids or visible foam in uther than trace amounts.
U.
CONTINUED...