Thanks for the additional information Hamster!
I tapped the ball a few times, then blew some air into the hole to blow out the remaining dust, and now it seems to be coming out clean. I'm not getting anymore pieces of plastic, so I figure it's alright now.
I have only ever bowled with used balls, I have never even had a ball drilled so I had little knowledge of what to look for.
However, I used a guy who came well recommended and felt comfortable using him.
Anyhow, thanks again for the info all, I cant wait to get this ball on a lane!