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After the risers are installed and the lids are secured, the final step is to backfill the excavated areas with the displaced dirt. The presenter smooths out the soil around the newly installed risers. He suggests that the grass will eventually grow back over the area. Alternatively, grass seed can be applied for faster regrowth. This leaves the septic tank access points level with the ground, making future pumping significantly easier without the need for extensive digging.