I see no violation of my lease and no evidence of foul play at the home.

And Hershey, PA. is "the sweetest place on earth", it even smells like chocolate.I've been to Stockton.

Raise her rent and try to minimize the smell?

(I smell a liar right off the back... are you really the landlord or faking for her).

Depending on how sophisticated the problem tenants are, especially in a state like New York that is very tenant friendly, you might be battling them to leave for months on end.

I got a call for a poor old woman that has a tough situation. In short, she deeded two of her homes to her son who was being sued by a construction company. The company found out about the properties, included them in...

If Trump tries to do nice things for RE investors the other side will scream foul and suggest self benefit agendas. 

As a courtesy, I told them that I would notify the HOA property manager regarding the cigarette smell in the hallways, and all was good (so I thought).Then last week, I get an email that the cigarette smoke is getting worse and the tenant can now smell it inside their bathroom.

I think you have a tough battle ahead.

There are no signs that the tank has any issues (no visible oil in the soil at the surface and no smell of residual oil in the area), and I'm worried that a soil test is only going to cause unnecessary costs.