EXISTING LETTERS OF CREDIT

Exhibit 10(d)

SCHEDULE 1.1(b)

EXISTING LETTERS OF CREDIT

The Existing Letters of Credit are:

1. The Facility LCs issued by Comerica Bank, Compass Bank, Guaranty Bank, JPMorgan Chase Bank, N.A., PNC Bank, National Association, SunTrust Bank and Wachovia Bank, National Association listed in the attachments hereto;

2. Letter of Credit Number 91897053 issued by BNP Paribas on June 22, 2007 to U.S. Bank, as Beneficiary in the amount of $13,234,834.84;

3. Letter of Credit Number 9189798 issued by BNP Paribas on June 28, 2007 to LaSalle Bank Midwest National Association as Beneficiary in the amount of $8,067,745.10.

4. Letter of Credit Number 576898 issued by JPMorgan Chase Bank, N.A. on June 28, 2007 to LaSalle Bank as Beneficiary in the amount of $11,428,796.45; and

5. Letter of Credit Number 576899 issued by JPMorgan Chase Bank, N.A. on June 28, 2007 to LaSalle Bank Midwest National Association as Beneficiary in the amount of $6,953,778.13.