2019, so as to result in a final fiscal year 2019 appropriation from the 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. Hazardous Waste Electronic Manifest System Fund For necessary expenses to carry out section 3024 of the Solid Waste Disposal Act ( 42 U.S.C. 6939g ), including the development, operation, maintenance, and upgrading of the hazardous waste electronic manifest system established by such section, $8,000,000, to remain available until expended: Provided , That the sum herein appropriated from the general fund shall be reduced as offsetting collections under such section 3024 are received during fiscal year 2019, which shall remain available until expended and be used for necessary expenses in this appropriation, so as to result in a final fiscal year 2019 appropriation from the general fund estimated at not more than $0: Provided further , That to the extent such offsetting collections received in fiscal year 2019 exceed $8,000,000, those excess amounts shall remain available until expended and be used for necessary expenses in this appropriation. 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,