TM 10-8415-209-10 TM 8415 10/2 a. General.        These    procedures    should    be    followed    when    removing    the    overgarment    suit    in    an uncontaminated environment.  To remove the overgarment suit in contaminated environment, refer to FM 3-5/FMFM 11-10. b. Perform the following steps. (1) Remove helmet and chemical protective helmet cover, if worn. (2) Remove  chemical  protective  mask  (refer  to  Soldier's  Manual  STP  21-1-SMCT  or  Appendix  A  for specific chemical protective mask TM). 2-33