From www.wdwinfo.com

Disneyland Hotel Stinks!
Dec 24, 2008

According to local news reports in Southern California, a chemical reaction in the basement laundry room of the Disneyland Hotel resulted in a smell so bad that a hazmat team was called to investigate. A strong smell of chlorine forced the hotel to evacuate workers in the area, although no guests were directly affected. No one was injured and after the area was ventilated, the hotel resumed normal operations.