mended; necessary expenses for personnel and related costs and travel expenses, including uniforms, or allowances therefore, as authorized by 5 U.S.C. 5901-5902; services as authorized byN^ U.S.C. 3109, but at rates for individuals not to exceed the per diem rate equivalent to the maximum rate payable for senior level^positions under 5 U.S.C. 5376; procurement of laboratory equipment and supplies;