Safety during excavation

Following link from SafetySmart provides tips about safety during excavation.

http://www.safetysmart.com/safetysmart/resources/view.aspx?id=428&articleId=957&utm_source=pardot&utm_medium=email&utm_campaign=Bongarde#.UEdzpbLibRs

There are many more precautions to be taken about safe distances to be maintained for keeping the excavated soil, provision of ladders for use in emergency, display of cautionary signs, etc.