Barton Community College has refinanced its debt on the Library renovation and the addition to the Technical Building, paid for in 2008 with certificates of participation. The BCC Board of Trustees on Tuesday authorized a new lease-purchase agreement at lower interest rates.Administrators report the net savings to the college will be $306,056 over the term of the issue. The average interest rate on the outstanding Series 2008 Certificates is 5.13 percent and the average interest rate on the new certificates is 3.34 percent.