This is a publication of ITAtech committee of ITA (International Tunnelling and Underground Space Association).

The purpose of the document is described as:

"This guideline has been written to orientate tunnel designers, contractors and owners towards understanding the benefits and limitations of the currently available technology for seismic investigations during tunnelling that is already used and has a proven record."

A very valuable reerence document:

ITAtech Publication: Geophysical ahead investigation methods / Seismic methods

Please check ITAtech site for many more valuable resources.