As some commenters have noted, the sentence you provide is not grammatically correct. If the sentence you provide is a correct transcription of what the speaker said, then it's an example of the way in which spoken language is often not grammatically correct, because people misspeak, hesitate, start saying one thing but link it to something else, and so on.
In general, as is a conjunction or an adverb, and such words cannot on their own be the objects of a preposition. However, as can introduce clauses that are the object of a preposition:
Collect money from as many people as possible
So, you might find as following a preposition, but it will not stand alone as the object of the preposition. Instead it will be part of a clause, and that clause will be the object of the preposition.