The monies in the fund shall be used for the purpose of making the incentive payments authorized in this section. The fund shall be administered by the MDA. Any interest earned on or investment earnings on the amounts in the fund shall be deposited to the credit of the fund. Unexpended amounts remaining in the fund at the end of a fiscal year that are not necessary for incentive payments shall lapse into the General Fund. The MDA may use not more than one percent (1%) of interest earned or investment earnings, or both, on amounts in the fund for administration and management of the incentive program. The MDEQ may use not more than one percent (1%) of interest earned or investment earnings, or both, on amounts in the fund for oversight costs of the assessment and remediation of the contaminated site.