NC0004839_PLAN OF ACTION_20030116

NPDES DOCUWENT SCANNING COVER SHEET
NPDES Permit: NC0004839
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
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Plan of Action
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Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date: January 16, 2003
WIVIS docsument log printed on rezz$e papexr--ignore any
content on the reYer,�e Side

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ExxonMobil
Refining & Supply Company
Exxon Terminal
P.O. Box 82
Paw Creek, North Carolina 28130
E*pnMoM
Refining Supply
January 16, 2003
North Carolina Division of Water Quality
Water Quality Section
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1 61 7
RE: ExxonMobil Charlotte Terminal
NPDES Permit No.: NCO004839 Wp`ERa G
MTBE Reduction Plan
Dear NPDES Contact,
In accordance with Section A.(4), MTBE Special Condition, of ExxonMobil Charlotte Terminal's NPDES
Permit No. NC0004839, attached please find a copy of the terminal's MTBE reduction plan. MTBE has
been detected in the terminal's outfalls during the past year only on an intermittent basis. With continued
monitoring and implementation of the MTBE Reduction Plan, it is believed that any presence of MTBE in
discharges will continue to be at acceptable levels.
If you have any questions or comments, please contact me at [phone].
Sincerely,
Robert E. Gaston
Terminal Superintendent

ExxonMobil Charlotte Terminal
MTBE Reduction Plan
The ExxonMobil Charlotte Terminal has installed carbon adsorption systems as a means of
treating waters prior to discharge via permitted outfalls. The following steps are identified as
the terminal's MTBE Reduction Plan and are designed to reduce the level of MTBE in its
discharges:
• Carbon bed change-out will occur at a minimum of once every six months for each carbon
vessel.
• The results of MTBE monitoring samples will be reviewed by terminal personnel and/or
consulting personnel working on behalf of ExxonMobil to determine the effectiveness of the
carbon systems.
• When warranted by MTBE sample results, adjustment to carbon system operations will be
made and may consist of such items as a change in the frequency of carbon beds
replacement, adjustment to the volume flow rate, etc.
This plan shall be reviewed periodically by terminal personnel for effectiveness and updated as
deemed necessary.
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