Throughout pumping, maintain consistent vacuum, prevent tank wall damage, break up heavy solids with agitation

https://mike-wiki.win/index.php/Professional_Septic_System_Maintenance_%26_Pumping:_Affordable_Service_List

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