{"id":"25209744-db77-4f49-ac13-4fa231a6d5c4","task":"Apply OSHA 1926.1153 Table 1 controls for handheld grinders used for mortar removal (tuckpointing)","domain":"osha.gov","steps":["Confirm the task is mortar removal (tuckpointing) with a handheld grinder, which has its own Table 1 entry distinct from other handheld-grinder uses.","Equip the grinder with a shroud plus a dust collection system rated at 25 cfm or greater airflow per inch of wheel diameter, filtration of 99% or greater efficiency, and a cyclonic pre-separator or filter-cleaning mechanism.","Operate and maintain the tool per manufacturer instructions to minimize dust emissions, and keep the collector filter/bag serviced per that guidance.","Check the current Table 1 respirator requirement on osha.gov for the specific duration and location (indoor/enclosed vs. outdoor) rather than assuming no respirator is needed.","Where full Table 1 controls can't be implemented, use the standard's alternative exposure-assessment path (air monitoring against the 50 microgram/m3 PEL) instead of guessing at controls."],"gotchas":["The tuckpointing-grinder entry requires stricter dust collection than the general 'handheld grinders for tasks other than mortar removal' entry -- don't apply the wrong row.","A written exposure control plan and a silica competent person are still required under 1926.1153 even when following Table 1 controls exactly.","Indoor/enclosed tuckpointing commonly requires a respirator regardless of duration; confirm the current text on osha.gov rather than relying on secondhand summaries."],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","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/25209744-db77-4f49-ac13-4fa231a6d5c4"}