Drainfield depth

[GRWeldon]

Good day y'all. First post.
I have a situation where I need a septic drainfield. The location I have selected will eventually have more fill on top of it after the field lines are installed leaving the leach lines deeper than the generally recommended 36" or less. The selected site is already prepared with sandy fill at least 36" deep on very porous ground. There is never standing water for more than 30min. and this is only after a deluge.

I do not know if there is a specific reason the recommended depth is 36" or less other than cost to dig deeper. Will my proposed plan keep the septic system from working properly?

 

[RS]

Too bad someone more knowledgeable hasn't responded, I 'm no expert, but i have done a couple of drain fields. I would put it in a little shallow and add the fill later. In MN there are lots of regulations, which are good, it doesn't allow someone to sell a substandard property, and reduces pollution. Does your county have and advice on what to do? When I put in my first system 50 years ago I got lots of good advice from our county, with plans how to build a system.

 

[Twowaxhack]

You want a shallow drainfield to facilitate evaporation.

Most of your water evaporates.