Page 22 indicates there is some sort of semiconductor process at the facility:
> "EPA observed that the sign posted on Solvent Tool 8-113 (B(4)) in Apple’s B(4) Area needs to be updated to remove the chemical “B(4)” from the posted sign, which according to Apple is no longer being used in the facility’s semiconductor process."
> "EPA observed that the sign posted on Solvent Tool 8-113 (B(4)) in Apple’s B(4) Area needs to be updated to remove the chemical “B(4)” from the posted sign, which according to Apple is no longer being used in the facility’s semiconductor process."