I just want to say.
I apologies to all who think I have an “attitude”.
I am just strong willed when it comes to concluding a "quick conclusion on the “chinese drywall” and walking away which I have heard about many a “home inspector” do when stumped .
I started the inspection checking for chinese drywall myself, (I checked) then called for help, thus made it a We checked. We put more eyes on it and still didn’t find any or any more signs that pointed to “chinese drywall” (I actually have a piece of the drywall from around the breaker box). We spent 3 hours (6 man-hours looking just for signs of chinese drywall) so yes that plus my above statement is why I have ruled it out from post #1.
Personally I think sometimes if it supposed to be a Duck but it is kind of a ugly duckling, things sometimes turn out to be different.
Here are a couple of replies I have recieved from local electricians:
When something is burned that means the connection has overheated, typically because of a loose connection. Since all the ground wire are equally colored then they all would have to be loose. They all couldn’t be loose. It looks like to me the neutral wires are discolored as well and the Aluminum ground bar doesn’t show sign of overheating.
The drywall is a possibility. Maybe the contractor used one bad sheet near the panel.
If the ground wires are in fact “burned”, The only thing could be a bad neutral connection between the panel and transformer. Thus causing the current to travel across the ground wire.
I agree the wires do not look right….only two things would do this ( 1 ) chemical ( 2 ) heat
I would look at first means of bonding where the power companies neutral and the grounding electrode are connected together . make sure they are not loose and that they are connected together properly and that the bond is tight at the ground rod connection. Has the homeowner experienced and flickering of lights?