Dirt floor thickness?

[California]

I assume minor meant less than a quart.

Yes. I'm thinking of the times I've rolled into the shop with say a torn loader hose and hydraulic fluid dripping at several points. It seems like reconditioning the floor would be more work than the mechanical repair. If it weren't cleaned then I would eventually track oil into the house ... and I don't want to think what that would cause!

I'm thinking about a floor made from compacted 'bluerock' (decomposed shale) and can't decide if the extra cost for concrete is worthwhile.

Here's bluerock a few months after placing 2 inches my driveway. The only compaction was traffic. 4 years later it looks the same, maybe a little smoother.
http://www.tractorbynet.com/forums/...ve-your-driveway-646716-img_3216rdriveway.jpg That's the cheapest local material that will compact well.

 

[napabavarian]

Hey California, what Quary do you go to? I was told to avoid Syar