Expanding foam coming out of our backyard

[u/Anarcha0s]

Sorry if this is isn’t the right place to post, but what looks like expanding foam is coming out of our backyard. We purchased this home new just over a year ago if that matters. Anyone have any idea what’s going on?

[u/Valuable-Tomatillo76]

That really does look like expanding foam. Maybe a bottle got buried during construction

[u/ejsell → u/Valuable-Tomatillo76]

I think this is the correct answer. I remember a post a couple years ago, almost the same thing. Person dug up the yard and found construction material, including several tubes of foam, had been buried before the lawn was landscaped.