Verification before introduction of highly hazardous chemicals — design / construction / PSM readiness
OSHA PSM 1910.119(i) is the final gate before highly hazardous chemicals are introduced into a new or modified process. The element requires verification that construction and equipment match design per (i)(2)(i), procedures are in place per (i)(2)(ii), PHA recommendations are resolved per (i)(2)(iii), and training is completed per (i)(2)(iv).
PSSR is the last opportunity to catch the post-modification incident pattern before it manifests in operation. Williams Olefins, Tesoro Anacortes, and BP Texas City CSB reports all included PSSR findings — incidents that happened because the formal gate either wasn't held or was held without substance. Sites with disciplined PSSR programmes have dramatically lower startup-incident rates.
(i) is the closing gate for (l) MOC and the opening gate for live (f) operating procedures. It integrates (d) PSI verification, (e) PHA closure, (g) training completion, (j) MI commissioning into a single readiness signoff. Element (i) is where the entire management system proves it's ready for operation — without this gate, modifications go live untested.
A focused 6-step methodology calibrated to deliver pre-startup safety review (pssr) as a working capability — not a documented compliance artefact.
Per (i)(1), trigger PSSR for new construction or MOC-driven modification before HHC introduction; align with corporate PSSR procedure.
Multi-discipline walk-down — process, mechanical, electrical, instrumentation, HSE; verify construction matches P&ID; document deviation resolution.
Per (i)(2)(iii), confirm PHA / HAZOP / LOPA / SIL actions closed or risk-accepted with documented evidence.
Per (i)(2)(ii) and (iv), confirm operating procedures updated and operator training complete with documented competency.
Mechanical integrity, SIS commissioning (FAT / SAT), HAC drawings, ESD / F&G commissioning; align with relevant codes.
Site leader and HSE manager signoff before HHC introduction; specify authorisation hierarchy and audit trail.
Decision-gated workflow showing the actual sequence of activities — from initiation through steady-state operation — with key decision points highlighted.
We can scope this element implementation against your facility, regulatory context, and existing management-system maturity — and integrate it with the other OSHA Process Safety Management (29 CFR 1910.119) elements you already operate.