I would strap it up under the home, not lay it on the ground.
I would also put an LB where you make the turn from the riser to the horizontal run under the home so the pull is reasonable.
Your AHJ might want Sch 80 for the riser and/or some supplemental support. A PT 4x4 extending to the bottom of your trench with the SE riser strapped to it should do it.
Down here in the south a piece of Trex might be a better choice since even PT gets eaten by something.
