Hello, I live in Corpus Christi Texas. I have read another persons experience of drilling in Houston Texas and finding the water table at around only 10 ft. below surface. I was wondering if this could be a problem with installing vertical shafts for sending and returning air for cooling a small Greenhouse(H=8' W=10' L= 20')? Or could this be a usable feature as water is good for heat transfer? The temperature here is almost always HOT year round and I've read the ground temperature is around 70 degF. I was envisioning a simple solution such as blowing air from the Greenhouse down into each hole and having a second return pipe coming from each hole to return the cooler air with the top of bore whole sealed off. Would something like this be feasible in a climate like south Texas using multiple bore holes? I want to make sure before I get someone to bore holes for me. Also, the reasons I was thinking of vertical shafts are; 1. I assume my whole yard would have to be dug up, yikes. 2. The cost of snaking horizontal pipes around might have bad return on investment for me. Thanks for any advice or experiences!