To ensure workplace safety regarding medical and first aid services, here's what you need to know:

1. Emergency Medical Services: Employers must ensure emergency medical services are readily available for injured employees [1]. If these services are not in close proximity, a qualified first aid person must be available [1].
2. Emergency Medical Plan: Develop a plan to ensure rapid medical services for major illnesses and injuries [2]. If a physician or ambulance with EMTs is readily accessible, the plan must include the emergency telephone number of the ambulance service, conspicuously posted [2]. In areas with 911 service, this may be used instead [2].
3. First Aid Supplies: Employers must provide first aid supplies based on the intended use and potential injuries at the workplace [1]. Supplies should be in close proximity to all employees and available for each shift [1]. Supplies must be stored in containers that protect them from damage, deterioration, or contamination. The container should be clearly marked and accessible when needed [1].
4. First Aid Personnel: A 'qualified first aid person' is someone with valid (current) first aid training by the American Red Cross or equivalent [1].
5. Emergency Eyewash and Shower Facilities: If employees handle substances that could cause injury if they get into their eyes or onto their bodies, provide eyewash or shower facilities, or both, based on the hazard [3]. Locate these facilities so that exposed employees can reach them and begin treatment in 10 seconds or less, with an unobstructed path [3]. Water must flow for at least 15 minutes [3].
6. First Aid Room: If 200 or more employees are working at a workplace at any time, the employer shall ensure that a first aid room is provided and that it is clearly identified by a conspicuous sign [4].
7. Communication of Information: Employers must post information regarding first aid procedures, locations of first aid stations and rooms, list of first aid attendants and how to contact them, emergency telephone numbers, and transport procedures for injured employees [5].