We are on the exact same wavelength

I’m pretty sure that’s Thunder. I haven’t tried it myself though.

You could try researching CSAs in your area. There are a few near me that sell farm shares with weekly pickup of seasonal veggies during harvest season. I’m in northern California, and our rate is under $20 per week after we split it with another couple. We usually receive more veggies than we would buy during a weekly grocery store trip, plus our farm let’s everyone pick fresh bouquets each pickup as a nice bonus.

I’d take a trip to the local septic permitting agency and see if I could get copies of the permit and approved septic system design/as-built site plans. The inspector will probably be able to tell you if you need it or not.

It might be a vent for the leach field although that’s not common where I’m from. I guess it could also be a marker for a distribution box or some other system component.