During pumping, maintain stable vacuum, avoid tank wall damage, separate heavy solids with agitation

https://fun-wiki.win/index.php/The_Property_owner%27s_Guide_to_Budget_Sewage-disposal_Tank_Emptying_and_Upkeep

Throughout pumping, maintain steady vacuum, prevent tank wall damage, break up heavy solids with agitation, and never get in the tank; deadly gases require strict confined-space safety protocols.