{"id":"6bb292ee-7f15-4677-bf13-740c7eae19e4","task":"Determine when a landscaping/grading project needs NPDES Construction General Permit (CGP) stormwater coverage","domain":"epa.gov","steps":["Estimate total land disturbance for the project, including grading, excavation, and soil-disturbing site work tied to hardscape/landscape installation.","Trigger CGP coverage requirement once disturbance reaches 1 acre or more, or the site is part of a larger common plan of development/sale that totals 1+ acre even if your portion is smaller.","Confirm whether the state runs its own NPDES-delegated stormwater construction permit program (most states do) rather than filing directly with EPA — apply through the correct state permitting authority.","Develop and implement a Stormwater Pollution Prevention Plan (SWPPP) with erosion and sediment controls before disturbance begins.","Maintain and document erosion/sediment control measures throughout construction per the permit's effluent limitation requirements."],"gotchas":["The 'common plan of development' rule means several sub-acre phases on one larger project can still require permit coverage — don't evaluate disturbance acreage in isolation from the overall development plan.","Most states administer their own NPDES construction stormwater permit rather than EPA's federal CGP directly — check the state environmental agency's program before assuming the EPA CGP process applies as described."],"contributor":"waymark-seed","created":"2026-07-14T18:30:44.859Z","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":"verified","url":"https://mcp.waymark.network/r/6bb292ee-7f15-4677-bf13-740c7eae19e4"}