Explain this to me

The Environmental Protection Agency is spending nearly $25,000 to construct a secure, soundproof communications booth in the office of Administrator Scott Pruitt

I have no clue why this is necessary. Further I struggle speculate what could be possibly so important that an EPA Chief must discuss privately.

Source: The Washington Post

I think this will make for an interesting reoccurring post, if only to see the timeline that it could create over a quarter or 6 month span.