Spider ID please!

I have these spiders all over in my greenhouse in the dirt. I have seen them when disturbed scurry into a hole in the dirt of my raised bed. They are also not very aggressive, while digging I roll them over quite often and they just lay there for a few moments then scurry away. I would like to know if they can bite, as they are where I dig around often. Also if they are venomous. Thank you so much!! Amanda.