There shall be assessed as costs a surcharge in the amount of two hundred fifty dollars on all petitions for expungement filed under the provisions of section 610.140. The judge may waive the surcharge if the petitioner is found by the judge to be indigent and unable to pay the costs. Such surcharge shall be collected and disbursed by the clerk of the court as provided by sections 488.010 to 488.020. Moneys collected from this surcharge shall be payable to the general revenue fund.