Decommissioning a science area: Our school is building a new science area and will be decommissioning the existing science rooms. What advice can you provide on this process please?

Decommissioning a science area: Our school is building a new science area and will be decommissioning the existing science rooms. What advice can you provide on this process please?
Disposing of wire gauze mats with ceramic centres: I have some of these and have checked with the supplier in relation to the possiblity of containing Tremolite.
Plasma ball: Are there any safety issues associated with using a plasma ball in the classroom? Sources on the internet seems to give conflicting information and I would appreciate some clarity.
Standard Operating Procedure (SOP) and detailed method on how to handle liquid nitrogen (LN2).
Use of lead in schools: Use of lead and lead salts in schools: Is lead (solid, lead shot, salts) allowed to be used in Years 7 to 10? Are lead salts banned in some jurisdictions?
Glutaric acid: I have found some old glutaric acid in my chemical store and would like to know if it is an approved chemical for use in schools.
Hydrochloric acid and ammonia reaction:
Chemistry Experiment using reflux and distillation: Is there an organic practical that uses two of reflux, distillation and liquid-liquid extraction that does not require a fume hood?
Bromine Water: I have been asked to make up bromine water for testing its reaction with hydrocarbons. I know that this is very toxic and requires an S7 Poisons Permit.
Reaction between iron and sulfur: When we conduct the reaction between Fe and S, it seems to create SO2, which is toxic, and sometimes I smell H2S.