in addition to waste oil tank, there could potential PCBs from leaky lifts and impacts from motor disposal well or septic system if was used at site.  

Even oil rich property goes for way less than $28k per acre.

It's easy to forget sometimes how emotional real estate investing can be (for ALL of us, but more so for some than others), and having City Council shake the tree may actually lead to more coconuts on the ground for savvy investors who are willing to figure out how to change with the times. 

We rebuilt the kitchen and bathroom from studs up.Converted from oil heat to gas.

Stuff on the MLS usually flies off the market if it's aggressively priced, and stuff that doesn't is usually pretty hairy (e.g. illegal apartments, city violations, leaking oil tanks, whatever else).

If pimps are owned by the oil company they will want a contract so you need a consultant to help you as they are tricky. 

The oil companies will be changed, airlines, cruise lines, retail will keep changing just now accelerated.We had huge apartment loft types that popped up like weeds, I look for those to be hurt how bad we will see next 6 months.They choose to build these more profits then SFH housing?

They want to drive out oil and gas, they embraced gun control and chased off gun manufacturers, legalized recreational marijuana, they coddle illegal immigrants...it's just a matter of time before it turns hard blue.

I know electric heat would be expensive for the tenants to pay for even in just 600 SF units, but I think I would be better off dropping rents accordingly and avoiding $15K/year in oil, lots of plumbing repair work, and many future headaches.What would you do?

The Arabic governments manipulated us in the mid 80's to snuff out US production by dumping oil on the market year in year out.