PORT JEFFERSON - An internal memo obtained by News 12 Long Island shows that employees at Mather Hospital in Port Jefferson are instructed to get rid of unused drugs in an unusual way. The memo directs workers to get rid of controlled substance solids, like pills, by putting them down a sink. Injectable or oral liquids are to be flushed down a toilet or dumped in a sink. It comes as experts are increasingly worried about traces of controlled substances showing up in Long Island's water supply. Hospital officials declined to speak on camera, but a spokesperson said the hospital doesn't think it is doing anything wrong according to state law.The Suffolk County Department of Health says flushing drugs is legal, but County Legislator John Kennedy (R-Nesconset) says he thinks the practice should be banned.