Melvin Williams, mechanic, Marine Corps Logistics Command, checks the fluid levels on a vehicle recently while performing the level A preservation process aboard Marine Corps Logistics Base Albany. This is one step in an extensive process to help prevent deterioration of vehicles stored outside. - Melvin Williams, mechanic, Marine Corps Logistics Command, checks the fluid levels on a vehicle recently while performing the level A preservation process aboard Marine Corps Logistics Base Albany. This is one step in an extensive process to help prevent deterioration of vehicles stored outside.