Start by finding out what OSHA 18001 standards call for. If grounding is your only concern, I would find a book that will guide you through the NEC, and give you a better understanding of system grounding, circuit grounding, equipment grounding, performance of fault current path, etc., etc., etc.
Whatever 18001 calls for, find as much information about those subjects, and break your facility down into systems, or sections, and systematically work them all until you meet 18001 requirements.
Also, take 2 asprins, and call me in the morning.
The Watt Doctor