{"id":"46735c3f-b4d4-4eb0-8aea-d529f467f017","task":"Size a conventional gravity drainfield from percolation test results using a state code table","domain":"dee.nebraska.gov","steps":["Obtain the percolation rate (minutes per inch) from a properly conducted perc test","Look up the required square footage per bedroom for that percolation rate in the state's onsite wastewater rules (e.g., Nebraska ties drainfield square footage to both bedroom count and perc rate under its Title 124 onsite wastewater rules)","Calculate total drainfield area needed by multiplying the per-bedroom square footage by the design bedroom count","Apply any required soil/site reduction or additional factors (slope, groundwater separation) called out in the state design standard","Lay out trenches or beds to meet the calculated area while respecting minimum setback distances"],"gotchas":["Square-footage-per-bedroom tables differ significantly by state and even by percolation-rate band within the same state - a table from one state is not transferable to another jurisdiction","Design flow assumptions (gallons per bedroom per day) that feed the sizing calculation can change with code updates - confirm you're using the currently adopted rule chapter, not an archived version"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/46735c3f-b4d4-4eb0-8aea-d529f467f017"}