What is this bubbling out of the ground in my yard? Purplish metallic gooey inside. Keeps bubbling even if I dig a thin layer down with a shovel
A: It turned out to be from a can of expansion foam the builders had left in the yard. water got to the can which rusted and leaked, causing the foam to reach the surface. best possible outcome for me, although I’m sure some were hoping for something more exciting.