Standard Requirements for Laser Installations Class 1 2 3a 3b 4 Inventory X X X ANL laser safety training LSO X X X Laser Area Posting LSO X X X Laser controlled area Rec X X Interlocked LCA entry If unattended operation X Indicator or invisible beam "ON" X X X Shield diffuse reflections X Written SOP (Microsoft Word or pdf version) LSO LSO No intentional staring into beam or specular reflections LSO X X X No unshielded eye level or vertical beams LSO X X Careful control of spectators X X X Laser Safety Review by LSO X X X Blank - Not Required X - Requirement LSO - Requirement might be waived - consult with ANL Laser Safety Officer Rec - Recommended Reviewed: December 16, 2022