**LETTER      AGREEMENT**

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|         |                                                    |                                    |
|--------------|---------------------------------------------------------|-----------------------------------------|
|         | **IMTT              HOLDINGS INC.**                     |
|    |                                               |                               |
|         | By:                                           | /s/ THOMAS              B. COLEMAN |
|         | Name:              THOMAS B. COLEMAN                    |
|         | Title:                CHIEF EXECUTIVE OFFICER |
|   |                                             |                                                                                                          |
|--------|--------------------------------------------------|---------------------------------------------------------------------------------------------------------------|
|   | **SHAREHOLDERS:**                                |
|   |                                             |
|   | **MACQUARIE TERMINAL HOLDINGS              LLC** |
|   |                                             |
|   | By:                                    | Macquarie              Infrastructure Company Inc. (d/b/a Macquarie Infrastructure Company              (US)) |
|   |                                                  |
|   |                                                    |                               |
|--------|---------------------------------------------------------|------------------------------------|
|   | By:                                           | /s/ PETER              STOKES |
|   | Name:              PETER STOKES                         |
|   | Title:                CHIEF EXECUTIVE OFFICER |

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|         |                                                                                                                                                                                                    |                                    |
|--------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------|
|         | **CURRENT              BENEFICIAL SHAREHOLDERS ARE HEREIN REPRESENTED BY:**                                                                                                                             |
|         |                                                                                                                                                                                                    |
|         | JAMES J. COLEMAN JR., THOMAS B. COLEMAN              AND              JAMES OWEN COLEMAN, TRUSTEES OF VOTING TRUST AGREEMENT DATED MAY 2,              2006              AS AMENDED ON JANUARY 11, 2007 |
|    |                                                                                                                                                                                               |                               |
|         | By:                                                                                                                                                                                           | /s/ THOMAS              B. COLEMAN |
|         | THOMAS              B. COLEMAN, TRUSTEE                                                                                                                                                                 |
|   |                                                    |                                                    |
|--------|---------------------------------------------------------|---------------------------------------------------------|
|   | By:                                           | /s/ JAMES              J.              COLEMAN JR. |
|   | JAMES              J. COLEMAN JR.,              TRUSTEE |

|   |                                   |                                                |
|--------|----------------------------------------|-----------------------------------------------------|
|   | By:                          | /s/ JAMES              O.              COLEMAN |
|   | JAMES              O. COLEMAN, TRUSTEE |

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