(a) Under a contract for State assistance, a grantee may periodically request up to 50 percent reimbursement of the eligible costs of completed portions of the project, and, in the case of a landfill closure project, a municipality with a population less than 3,500, as determined by the Federal decennial census at the time of contract, may periodically request up to 90 percent reimbursement of the eligible costs of completed portions of the project. Payment requests are to be submitted to the department in a form prescribed by the department and must contain all information required by the department.

(b) Only expenses determined by the department to satisfy the terms of the contract will be reimbursed. For landfill closure and landfill gas management projects, 10 percent of the approved reimbursement amount will be retained by the State until the completed project is reviewed and approved by the department.

(c) The grantee is required to submit a certificate of completion, in a form prescribed by the department, accompanying the final payment request for the project. The final payment request will be considered incomplete until the department receives the certificate of completion.

(d) The department may conduct inspections of the project or request a presentation by the applicant for planning, promotional and educational projects or household hazardous waste collection and disposal projects before making a determination for final payment approval.

(e) Payment under the State assistance contract will be made only after approval by the department.