Thank you for your email regarding Grounding/Earthing standards for Telecommunication sites. While there are certainly many different standards that may apply, the single best and most organized source that we have found is the Motorola R56 standard. This graphical standard provides a complete methodology for grounding both internally to the equipment, and externally to the earth. And the good news is that compliance to this standard covers most, if not all, other standards. It may even have some check lists for you.
If we can be of any further assistance to you, please do not hesitate to
The Engineering Team at E&S Grounding Solutions