08087afe_rds_for_Tanks___Enggcyclopedia__Title
[API Standard] API-2015 [Description] Guide for preparing, emptying, isolating,ventilating, atmospheric testing, cleaning, entering into, hotwork and recommissioning activities in, on and around atmospheric and low-pressure (up to 15 psig) above ground storage tanks containing flammable, combustible or toxic materials. [Title] 
Cleaning Petroleum Storage Tanks
API Standards for Tanks | Enggcyclopedia
Title