{"id":"2c28bded-82a4-425e-b202-fd00dd826b85","task":"Comply with OSHA 1910.94(a) ventilation and respirator requirements for abrasive blasting","domain":"osha.gov","steps":["Maintain continuous inward airflow at all blast-cleaning enclosure openings during operation per 1910.94(a)","Design and verify exhaust ventilation/dust collection consistent with the local exhaust system principles referenced in the standard","Provide explosion venting/loose-panel construction on enclosures, ducts, and collectors where combustible dust may be present","Supply respiratory protection under 1910.134 based on an exposure assessment, using abrasive-blast supplied-air respirators for silica-generating work","Cross-check exposure controls against OSHA's separate respirable crystalline silica standard (1910.1053) whenever blasting generates silica dust"],"gotchas":["1910.94(a) governs enclosure/ventilation design; respirator selection and silica exposure limits are separately governed by 1910.134 and 1910.1053 and must be checked together","The standard does not name or ban any specific abrasive — it is the silica exposure limit, not 1910.94(a) itself, that functionally restricts silica sand use"],"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":"sampled","url":"https://mcp.waymark.network/r/2c28bded-82a4-425e-b202-fd00dd826b85"}