Hello all, Our septic tank riser comes just to the surface of our lawn, such that with a bit of regrading to raise the lawn surface -- we could trivially put a few inches of top soil and plant grass over the top of the riser lid. Is this a particularly good or bad idea? It would actually reduce the probability of water getting into the riser, by encouraging more drainage away. We could of course also put a bit of a gasket under the lid to seal it against the riser, though I think that shouldn't be needed in our specific situation. We don't mind digging the few inches to expose the lid for regular inspections and pumping, since it is way better than digging 3-4 feet to the actual tank surface. From searching online I was not able to find good answers to this -- most searches returned general results about using risers to avoid burying your tank access, etc. However, I am specifically asking about covering the riser lid.