22 students and staff members were treated Thursday morning at Ramapo High School, reportedly after a blast of pepper spray from a keychain. Ramapo Police say 21 were treated at the scene, one was taken to Nyack Hospital. Police say Rockland County Hazmat conducted air sample analysis and gave the all-clear. Patients had complained of nausea, coughing, and sore throats. Students were back in class by noon.