You need to worry about environmental contamination, illegal dumping next to the gas station over the years, and leaking of gas tanks.It doesn't matter who caused the contamination the EPA will make the current owners clean It up.If it's a new build the seller should have a phase one completed on the land.

I've been reading up on the issue and to my understanding all the contamination has been contained/removed. 

Any contamination can significantly affect your ability to sell the property.

They often sell good stuff to people like me that already knows them or other buyers and sell the scraps to newbies that do not know better and buy the dogs.At very least you need a good commercial retail attorney to do the lease.Biggest thing with industrial is possible environmental contamination and if per the lease they are on the hook for it.Basically there are tons of things to look out for and you need help.  

@William Yeh   Under non-recourse loans, the guarantor is not generally responsible for losses the lender incurs, unless they commit certain bad acts; such as fraud, waste, damage or destruction, misapplication, misrepresentation, bankruptcy, or environmental contamination. 

@Jon Holdman so do nothing, let everything fester in muddy, contaminated water, and then have the restoration company come out once the tenant is discharged from the hospital and has had everything removed? 

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This category of liquid used to be called grey water, and is described as having a level of contaminates that may cause illness or discomfort if ingested.

Petersburg landlord faces the prospect of federal prison.The landlord, age 55, admits in court papers that he falsified lead paint disclosure forms, making it appear that renters knew of a risk before moving into contaminated apartments.

Weed is not a harmful drug, it doesn't cause people to break things or steal things, and it's not going to contaminate your property.