End Buyers want Perc test

[Clay Turner]

Hello everyone.  I'm new here.  I have sold 4 properties by the buy, hold until buyer found then sell method.  Worked pretty good.  So I wanted to try the whole sale method.  I currently have a property under contract and am trying to find a buyer.  It's vacant land.  I'm selling for less than half of tax assessment in a pretty nice area.  If sold at my asking price I'll make around $5k profit.  My question is how do I handle the number one question.....Does it perk?  As a wholesaler, am I supposed to perk test it myself, or do I include a clause in my contract that allows the buyer to conduct soil test and the deal is contingent upon results.   My current contract with seller does not list soil testing so I guess I would need to have seller sign a new contract?  Any help is greatly appreciated.  Thanks!!