Excavation Safety Guide and Directory

I had a magazine in my mailbox today - I did not subscribe to it, I am rather sure of that - titled "2011 Excavation Safety Guide and Directory - Safety in Trenches" provided by the Pipeline Association for Public Awareness. The articles are not bad and can probaby be used in training. Here is the link to the 2010 guide: http://www.sourcegas.com/UserFiles/File/Excavation%20Safety%20Guide.pdf