I think he is saying the latter. However, I've read that neurotoxic side effects of mercury can come from levels around 8 mcg/L. Studies show, people in the United States have around 1 mcg/L if they are NOT exposed to any mercury. OP's dad has x8 times that amount. Of course his levels are not alarmingly high, but I still wouldn't want those levels in my system for a lengthy period of time because that is where the damage can be done.
We really don't know much about his situation. Those levels could have come from a number of things like work exposure and/or diet.
I would really like more information from OP if he could give us it.
I want to add, anabolic lab doesn't show any contamination analysis for pharmacom Test-E300 or really any of their other products for that matter.