Abstract: THIS INCIDENT AROSE FROM THE SPRAYING OF INSECTICIDE DURSTAN 1.0. BY AN OUTSIDE CONTRACTOR IN THE GENERAL AREA WHERE WESTEN UNION TELEGRAM OPERATORS RECEIVED CALLS. AT APPROXIMATELY 6:00 P.M. ON 8/14/84, THE ROOMS TO BE TREATED BY THE EXTERMINATOR WERE EVACUATED. FROM 6:30 P.M. TO APPROXIMATELY 7:45 P.M. THE EXTERMINATOR APPLIED PESTICIDE TO THE RUGS IN THE EVACUATED ROOMS. THE EXTERMINATOR RECOMMENDED THAT THE ROOMS REMAIN EVACUATED FOR 2 HOURS AFTER BEING TREATED. AT APPROXIMATELY 7:45 P.M. WESTERN UNION HAD THE OPERATORS RETURN TO WORK IN THE ROOMS THAT HAD BEEN SPRAYED. APPARENTLY ONLY 1 HOUR AND 15 MINUTES HAD ELASPED FROM THE TIME OF SPRAYING TO THE RETURN OF EMPLOYEES TO THE SPRAYED AREA. AT 7:50 P.M. EMPLOYEE #1 COLLAPSED AT HER WORK STATION IN A RECENTLY SPRAYED AREA AND WENT INTO CONVULSIONS. SEVERAL OTHER EMPLOYEES BECAME NAUSEOUS, COMPLAINING OF HEADACHES, STOMACH PAIN AND FAINTNESS. EMPLOYEE #1 WAS HOSPITALIZED FOR 4 DAYS. ALL OTHER EMPLOYEES WENT TO THE HOSPITAL FOR TREATMENT BUT WERE RELEASED.