Experimental Safety Approval Form (ESAF) What is an ESAF? This form describes your experiment and any potential safety concerns. You cannot begin work without an approved ESAF. Instructions for new ESAF Instructions for new Run-Wide ESAF Instructions for how to duplicate earlier ESAF Experimental Safety Approval Form (ESAF) SER-CAT uses Run-Wide ESAFs covering the entire run period, which means: Submit your ESAF at least two weeks before the start of each run All training must be completed before ESAF approval SER-CAT staff review your ESAF first, then APS Safety approves it