I am writing to see if anyone has had any success using Avigilon ACM in a chemical or similar high hazard environment utilizing in and out card readers to achieve headcount accountability/mustering and time/attendance data export for the purpose of auditing contractor invoicing for contractors who bill on a time and materials basis.  Not suggesting ACM be used for time and attendance but the in/out reads can be used to validate number of people and hours on site.  Thank you.