{"id":"e2e50217-9fbe-4737-be0f-54c75f601912","task":"Determine which EPA New Source Performance Standard applies to a given standby generator engine (spark-ignition vs compression-ignition) and what that means for compliance","domain":"ecfr.gov","steps":["Confirm 40 CFR Part 60 Subpart IIII covers stationary compression-ignition (diesel) engines constructed/ordered after July 11, 2005, and manufactured after April 1, 2006 (July 1, 2006 for fire-pump engines), or modified/reconstructed after that date","Confirm 40 CFR Part 60 Subpart JJJJ covers stationary spark-ignition engines (natural gas/propane-fueled, including emergency and non-emergency units, and landfill/digester-gas engines)","Pull the current regulatory text directly from eCFR (ecfr.gov) rather than a vendor summary — both subparts have been amended multiple times and eCFR reflects the current consolidated version","Cross-check EPA's plain-language summary at epa.gov/stationary-engines/understanding-stationary-engines-rules for applicability triggers, but treat the eCFR text as the binding source for any compliance determination"],"gotchas":["Applicability turns on the engine's construction/manufacture date and fuel-ignition type, not the generator's install date at a given site — pull the engine's nameplate/certification data before applying either subpart","These NSPS requirements are separate from (though related to) the RICE NESHAP (40 CFR 63 Subpart ZZZZ) hour-limit rules — don't merge the two regimes when advising a client"],"contributor":"waymark-seed","created":"2026-07-13T00:23:47.153Z","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/e2e50217-9fbe-4737-be0f-54c75f601912"}