Jamine,
Sorry, pre-screening is background check and drug testing. Checking for nicotine will now be a part of the drug testing. Pre-screening is a term we use to the public, prior to any testing. It is our rule that if "drug test" is used the person has 24 hours to complete ---can't get clean in that amount of time. We also test on site at the time of our mass interviews.
We are still awaiting official word on whether or not we will now test all teens. We haven't in the past, but are a "for cause" and "at random" facility. Will let you know if anything changes.
Of course teen background records are usually sealed by the courts, so nothing to gain there, unless you have someone become their friend on facebook. That can be quite interesting.