Minn. R. 7080.2020
TANK IDENTIFICATION
A. Sewage tanks must be marked near the outlet with: (1) the manufacturer's name; (2) model number; (3) liquid capacity; (4) date of manufacture; and (5) maximum depth of burial. B. The tank manufacturer or manufacturer's agent shall provide the information in item A to the installer in writing. C. The tank inlet or outlet must be clearly marked. D. The installer shall submit the information in item A with the as-built drawing.