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Cash, Cash Equivalents and Restricted Cash
3 Months Ended
May 31, 2013
Cash, Cash Equivalents and Restricted Cash
(7) Cash, Cash Equivalents and Restricted Cash. The Company maintains its cash balances in interest-bearing bank accounts and highly liquid investments with maturities of three months or less. At May 31, 2013, MSC had $27 million of U.S. Treasury bills and $8.1 million of cash.

We have issued two letters of credit in connection with our Midco environmental liability and a workers compensation insurance obligation. The Midco letter of credit is $1.0 million and the insurance letter of credit is $0.1 million. Previously, these letters of credit were secured by a credit line with JPMorgan Chase Bank, N.A. The credit line expired in May 2013, so we established a restricted cash account with the Bank to secure the two letters of credit. At May 31, 2013, we had restricted cash of $1.1 million.