Code of Federal Regulations Title 40. Protection of Environment § 40.94.406 Reports filing:  record retention

(a) The reports required by §§ 94.403 and 94.404 shall be sent to the Designated Officer.

(b) The information gathered by the manufacturer to compile the reports required by §§ 94.403 and 94.404 shall be retained for not less than 8 years from the date of the manufacture of the engines and shall be made available to duly authorized officials of the EPA upon request.