For the purposes of carrying out this chapter, the Director of Finance may, by written order, authorize the withdrawal from the General Fund of an amount or amounts not to exceed the amount of the unsold bonds which the committee has, by resolution, authorized to be sold for the purpose of carrying out this chapter. Any amounts withdrawn shall be deposited in the fund to be allocated by the board in accordance with this chapter. Any money made available under this section shall be returned by the board to the General Fund, plus the interest that the amounts would have earned in the Pooled Money Investment Account from money received from the sale of bonds for the purpose of carrying out this chapter.