(a) will not exceed 50 percent of the eligible project cost or in the case of a landfill closure project, 90 percent of the eligible cost for a municipality with a population less than 3,500 as determined by the Federal decennial census at the time of contract;

(b) will not exceed $2,000,000;

(c) will be reduced by the amount of any other grants, including matching funds, for the project received by the municipality from any source; and

(d) is subject to final computation and determination by the department upon completion of the project, and will not exceed the maximum eligible cost set forth in the contract.