Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.11137

(a) Certify on the manifest receipt of the hazardous waste and return a signed copy of the manifest to the department within a period of 10 days after the end of the month for all hazardous waste received within that month.

(b) Return a signed copy of the manifest to the generator.

(c) Keep permanent records pursuant to the rules promulgated by the department.

(d) Compile a periodic report of hazardous waste treated, stored, or disposed of as required by the department under rules promulgated by the department.

(e) Retain a copy of each manifest and report described in this section for a period of 3 years and make each copy readily available for review and inspection by the department, the director of public health or a designated representative of the director of public health, a peace officer, or a representative of the United States environmental protection agency. The retention period required by this subdivision is automatically extended during the course of any unresolved enforcement action regarding the regulated activity or as required by the department.