EMERGENCIES:  Emergencies involving Hazardous Chemicals To contact EHRS during office hours, Monday through Friday, 8 AM to 5 PM 215-898-4453 After Hours: 215-308-5266 (pager) After the beeps, dial your phone number. If your page is not answered, call the University's Operations Control Center (OCC) at 215-746-6620. All Fire, Police and Medical Emergencies 511     from Penn campus building only 215-573-3333     Off campus & HUP For additional information on Chemical Spills see the Chemical Hygiene Plan