Superfund Interim Financing Act of 1986

Superfund Interim Financing Act of 1986 - Amends the Internal Revenue Code to reimpose the environmental excise tax on petroleum and petroleum products at their original rates, beginning April 1, 1986. Specifies that the proceeds from such excise tax will be designated to repay the advances from the Hazardous Substance Response Trust Fund (Superfund).

Terminates the excise tax on hazardous wastes received at hazardous waste disposal facilities.

Amends the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 to authorize appropriations for a repayable advance to Superfund for FY 1986 in an amount not to exceed $861,300,000.