To the University's wastewater treatment plant. All of the above. Your calculator batteries need to be replaced. The packaging indicates that they are mercury cells. Overpack them in a box and place it in the normal trash.
Normal trash is satisfactory.
Anything that you should not pour down the drain. Bag or otherwise contain the wet gel and dispose following procedure On-Site Service 1. Empty the column into a carboy because it contains solvents. Dispose of it in the normal trash. A 15-pound voltage regulator is found in the back of a stockroom.