general fund estimated at not more than $0: Provided further , That to the extent that amounts realized from such receipts exceed $5,000,000, those amount in excess of $5,000,000 shall be deposited in the TSCA Service Fee Fund as discretionary offsetting receipts in fiscal year 2019, shall be retained and used for necessary salaries and expenses in this account, and shall remain available until expended: Provided further , That of the funds included in the first paragraph under this heading, the Chemical Risk Review and Reduction program project shall be allocated for this fiscal year, excluding the amount of any fees appropriated, not less than the amount of appropriations for that program project for fiscal year 2014. Office of inspector general For necessary expenses of the Office of Inspector General in carrying out the provisions of the Inspector General Act of 1978, $41,489,000, to remain available until September 30, 2020. Buildings and facilities For construction, repair, improvement, extension, alteration, and purchase of fixed equipment or facilities of, or for use by, the Environmental Protection Agency, $34,467,000, to remain available until expended. Hazardous substance superfund (including transfers of funds) For necessary expenses to carry out the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), including sections 111(c)(3), (c)(5), (c)(6), and (e)(4) ( 42 U.S.C. 9611 ) $1,091,947,000, to remain available until expended, consisting of such sums as are available in the Trust Fund on September 30, 2018, as authorized by section 517(a) of the Superfund Amendments and Reauthorization Act of 1986 (SARA) and up to $1,091,947,000 as a payment from general revenues to the Hazardous Substance Superfund for purposes as authorized by section 517(b) of SARA: Provided , That funds appropriated under this heading may be allocated to other Federal agencies in accordance with section 111(a) of CERCLA: Provided further , That of the funds appropriated under this heading,