Question

Evaporation units may be operated without obtaining a permit if ________

(a) Chemicals are used

(b) Resins are associated

(c) Unit is enclosed

(d) Waste is reused

The question was asked in a job interview.

My query is from Physical Treatment in chapter Chemical, Physical & Biological Treatment of Hazardous Waste Management

Answer 1

Correct option is (c) Unit is enclosed

For explanation I would say: Evaporation units may be operated without obtaining a permit if evaporation unit meets the definition of a totally enclosed treatment system in 40 CFR 260.10.