A railcar of hazardous wastes containing methylene chloride (CAS # 75-09-2) is leaking near a residential neighborhood. As the subject matter expert, what are the key toxicological and health concerns associated with the chemical that has spilled onto the ground? What properties of methylene chloride would you use to determine if the local residential area should be evacuated? What personal protective equipment should emergency responders wear when coming into contact with the waste? What health concerns are identified on the Medical Management Guidelines for methylene chloride?