re: Danger of sawdust combustion?

When grounding the panel for my shop I used a 2" thick plate copper, buried 3 feet down. I used a piece of 10 gauge ground wire connected with all copper fittings. The plate is also connected to an old well with a iron casing. At the time copper was not the price it is now. I suspect the $300 I spent doing it now would be close to $1000, or maybe a lot more. As well every outlet has its own breaker and ground. Each outlet box is also grounded and then the whole thing is double wrapped in poly and taped so its air tight. Many would have said its overkill, but it’s my shop and ill cry if I want to….lol