SCOPE AND APPLICATION All tanks which have been used for leaded petroleum products will contain residual lead of varying concentrations. They must be regarded as dangerous to the extent that respiratory and skin protection must be used until the tank is determined to be thoroughly cleaned and safe for entry without personal protective equipment. This guide outlines safety precautions and procedures for controlling the lead hazard associated with entry and cleaning activities in storage tanks which have contained leaded products. It does not cover specific fire prevention measures or control of other hazards not related to the lead hazard problem. It is intended to be used with API RP 2015 Recommended Practice for Cleaning Petroleum Storage Tanks which contains additional information related to associated hazards. It should be regarded as a manual and not as an industrial standard. This guide only relates to the following: a) The company system for lead hazard tank entry and cleaning. b) The check list to be followed for tank entry and cleaning as related to the lead hazard. c) The use of the lead-in-air analyzer. d) How to dispose of sludge from leaded gasoline storage tanks.