1. Each place of work shall be visited by a certified person at the beginning of, and at least once during, each shift and more frequently as is necessary to insure that work is being done in a safe manner;

2. No employee shall be assigned, allowed or required to perform work alone in any area where hazardous conditions exist that would endanger his safety unless he can communicate with others, can be heard or can be seen;

3. When work is performed after dark, the areas of drilling, blasting, stripping and loading shall be properly illuminated;

4. An authorized, certified person shall be in charge at all times when men are working;

5. Where telephone service is not available, emergency communications shall be provided to the nearest point of assistance; and

6. Arrangements shall be made in advance for obtaining emergency medical assistance and transportation for injured persons.