During pumping, maintain steady vacuum, prevent tank wall damage, separate heavy solids with agitation

https://foxtrot-wiki.win/index.php/The_House_owner%27s_Guide_to_Budget_Septic_Tank_Emptying_and_Maintenance

Throughout pumping, maintain steady vacuum, prevent tank wall damage, break up heavy solids with agitation, and never ever get in the tank; deadly gases need stringent confined-space security procedures.