Q. Consider the following statements:

1. Bioventing and Biosparging are considered ex-situ bioremediation technologies.
2. In Bioventing, air and nutrients are injected, while Biosparging involves the addition of cultured microorganisms to the subsurface.

Which of the above statements is / are correct?
Answer: Neither 1 nor 2
Notes: Both statements are incorrect. Bioventing and Biosparging are in-situ, not ex-situ, remediation technologies. Bioventing injects air or oxygen (sometimes nutrients) to stimulate indigenous microorganisms, not cultured ones. Biosparging also introduces air and nutrients to increase the activity of native microorganisms, not by adding cultured microbes.