DCAS does not have anything to do with the hiring process anymore. It's the MTA Employment Center. Btw, if u fail a drug test or are disqualified for any reason. They have to mail or give you something in writing stating why. Or they can be sued. And of course you can appeal the decision by getting representation. Meaning a lawyer from the newspaper The Chief. But trust me if you have no case they won't even take it. Then, you can represent yourself or just forget about it and move on.