The fire dept wants the dirt area and the gravel drive area both tested. The gravel area isn't a legit compacted driveway. It's just dirt with gravel laid on top that's been driven on here and there for years. It's naturally compacted but not legit compacted.
So far I've had about 10 geo engineering businesses tell me they don't do residential and 3 tell me they do residential but there's no point in even coming out until I compact the dirt and at least 4 inches of compacted gravel on top of it because they won't certify it for 75k lbs otherwise.
I get not wanting to get your massive fire truck up to its axle in mud but regular homeowners are not cities and counties that can just up and pour 260ft roads at the snap of their fingers. If I could just sign a waiver that states if my shop goes up in flames, then oh well, I'd do it.