2.10.1 Units should be constructed from steel
or other suitable material having properties acceptable to the Administration
taking into consideration the temperature extremes in the areas in
which the unit is intended to operate.
2.10.2 Consideration should be given to the minimization
of hazardous substances used in the design and construction of the
unit, and should facilitate recycling and removal of hazardous materials.footnote
2.10.3 Materials which contain asbestos should
be prohibited.