If so, then you will need to fill the cracks with an oil-based caulk or concrete filler (oil-based caulk is cheaper ;-) ).  

A building that has a $4,000 fuel bill with oil at $2.10 a gallon becomes a completely different animal when fuel jumps to $4.10 a gallon.

ill buy your water rights.Like I love to say,you cant drink oil, and you cant eat gold ;)

However, the oil market is only one slice of Houston’s economy.

I currently am a truck driver for the oil fields here in Pennsylvania and make on avg 4000 take home per month and my monthly expenses are 1300 for bills not including food and other expenses for children and personal.

Also we are planning on ripping the oil furnace out and putting in a high efficiency gas so I feel as though I should play hard ball and tell him to take his fuel which legally he can do before closing, if that is the case the PVC vents could go away however that's only worth 200.

I too am in the PA area and there are definitely alot of rentals in this state especially because of the oil boom bumping housing prices up.

My aunt had an commercial property in  northern NJ where the tenant dumped oil. 

Oil and gas royalties are real.

The furnace is old but working (oil) and the well is ok.