ProPublica reports that a wide ranging freeze has be instituted at the EPA. It quotes Myron Ebell, the head of the EPA transition team as saying:
> They’re trying to freeze things to make sure nothing happens they don’t want to have happen, so any regulations going forward, contracts, grants, hires, they want to make sure to look at them first.
>
> This may be a little wider than some previous administrations, but it’s very similar to what others have done
ProPublica also reports that multiple anonymous EPA employees have confirmed the existence of such memo.
Here is a Fox News report based on anonymous sources that confirms the blackout. Fox News is also quoting Ebell's statements to ProPublica in regards to the contract freeze. It's not exactly clear how the two are related, but my guess is that the media blackout was a part of a larger directive that also included a freeze on contracts and grants.
It appears Sean Spicer is incorrect.