Throughout pumping, maintain stable vacuum, prevent tank wall damage, separate heavy solids with agitation

https://sierra-wiki.win/index.php/Reputable_Septic_Tank_Emptying_and_Installation:_Smart,_Cost-Saving_Techniques

During pumping, maintain stable vacuum, prevent tank wall damage, separate heavy solids with agitation, and never ever go into the tank; deadly gases need rigorous confined-space safety protocols.