Asbestos?

[Onion69420]

I'm renovating a room in my house. I'm replacing the mushy bottom plates and directly behind them, on the ground kinda between the outside sheathing and the bottom plate is this white stuff. Is firm but easily breakable.
Concerned this is asbestos.
I sent a sample of my floor tiles out and it came back as 10% asbestos(chrysotile)
Thoughts?

 

[tomtheelder2020]

I think you need to add photos backed out a bit for context. I can't tell what I am looking at with these closeups.
Do you think the white material has anything to do with your floors. If not, all the floors tell us is that your house is old enough to have asbestos containing materials.
If you are concerned, why not have it tested?
What would you do if the material tests positive for asbestos? If the plan would be to remove it yourself, just do that without the test (using proper precautions).

 

[Onion69420]

I think you need to add photos backed out a bit for context. I can't tell what I am looking at with these closeups.
Do you think the white material has anything to do with your floors. If not, all the floors tell us is that your house is old enough to have asbestos containing materials.
If you are concerned, why not have it tested?
What would you do if the material tests positive for asbestos? If the plan would be to remove it yourself, just do that without the test (using proper precautions).

So I'm talking about that white layer at the bottom, where the floor meets the side of the wall.

 

[tomtheelder2020]

The only "layer" I see looks like it is IN the wood and appears to be mineralization from infiltrating water. Even if it isn't that, I don't see any way it could be associated with the floor - do you? If you are still concerned it could be asbestos, remove and dispose of it like asbestos (using proper procedures).

 

[Onion69420]

The only "layer" I see looks like it is IN the wood and appears to be mineralization from infiltrating water. Even if it isn't that, I don't see any way it could be associated with the floor - do you? If you are still concerned it could be asbestos, remove and dispose of it like asbestos (using proper procedures).

What is mineralization?
I'm just a diy person, I don't see this stuff everyday