Driveway Oil Stains

[Mike B.]

Hello, Bigger Pockets community. I would appreciate some expert, experienced landlord advice from you all. 

This property was new when the tenant moved in three years ago. Shame on me for not doing a property inspection sooner. After three years I did a formal inspection and found all this oil. I hired a professional cleaning company but the stains aren't coming out. 

Questions: 

1. What should my expectations be regarding oil stains as a landlord? This is a newer $400,000 house in a nice suburb. 

2. What action would you take with the tenant? 

3. How can this be fixed? Concrete resurfacing or coatings? 

Thank you in advance.