Chemical waste containers need to be stored in secondary containers (the gray bins labeled with satellite accumulation area stickers). Incompatible chemicals cannot be stored in the same secondary container.
Chemical waste collection form - fill out this form to request a chemical waste pickup. Be sure and give them directions to the lab as well (put this link http://openwetware.mit.edu/wiki/Knight:Contact#Directions in the comments field). Note: request a pickup just before the waste container becomes full.