OSHA Safety and Health Regulations for Construction (29 CFR Part 1926) 1926.50: 1926.50 Medical services and first aid

Every construction employer has to make medical personnel available so that occupational health questions can be referred to them for advice and consultation, and before the project starts it has to arrange how an employee who is seriously injured will get prompt medical attention. Where no infirmary, clinic, hospital or physician that can treat injured employees is reasonably accessible in time and distance from the worksite, a person holding a valid first-aid certificate (issued by the American Red Cross or the U.S. Bureau of Mines, or from equivalent training provable by documents) must be on site to give first aid. First aid supplies must be easy to reach when needed. The kit contents go in a weatherproof container with each type of item in its own sealed package, and the employer checks the kit before it is sent to each job and at least weekly while on the job so that used items are replaced. The employer must provide either suitable equipment for quickly moving an injured person to a hospital or doctor, or a way of calling out an ambulance. Where 911 dispatch does not exist, the phone numbers of physicians, hospitals or ambulances are posted conspicuously. Where 911 exists and the employer relies on a communication system to reach emergency medical services, the employer must make sure that system actually works for that purpose, and if the system does not pass the caller's latitude and longitude to the dispatcher automatically, the employer posts conspicuously at the site either the site's latitude and longitude or other location information that effectively tells employees where they are. That posting is not needed where readily available land lines with 911 service automatically identify the caller's location. Where anyone's eyes or body could be splashed by harmful corrosive substances, suitable facilities to drench or flush the eyes and body quickly must be located inside the work area, ready for immediate use in an emergency. Appendix A (non-mandatory) points to ANSI Z308.1-1978 as an example of minimal kit contents and advises assessing site needs periodically.