#	Letters of Interpretation
1	10/02/2020 - 1910.119(e)(7) - Documentation of PHA Findings and Recommendations
2	10/02/2020 - 1910.119(e)(5) - Documentation of PHA Findings and Recommendations
3	09/20/2019 - 1910.119(e)(6) - Updates to PHA Extended Shutdown Facility
4	02/01/2010 - 1910.119(e) - "Applicability of the PSM standard's mechanical intergrity requirements to refinery structures."
5	12/26/2007 - 1910.119(e)(1) - Clarification of requirements for storage and use of flammable and/or combustible liquids.
6	07/12/2006 - 1910.119(e)(3) - PSM compliance for ammonia refrigeration systems.
7	02/01/2005 - 1910.119(e)(3) - Documentation methods used to comply with the qualitative evaluation of a range of possible safety/health effects of "failure of controls" requirement of the PSM standard.
8	02/01/2005 - 1910.119(e), 1910.119(e)(3) - Documentation methods used to comply with the qualitative evaluation of a range of possible safety/health effects of "failure of controls" requirement of the PSM standard.
9	11/19/2001 - 1910.119(e)(4) - Process hazard analysis facilitator's training requirements.
10	07/09/1999 - 1910.119(e) - Applicability of the PSM standard to a flammable liquid manufacturing process.
11	01/22/1998 - 1910.119(e)(3) - Steps for updating and revalidating a Process Hazard Analysis (PHA).
12	01/22/1998 - 1910.119(e)(6) - Steps for updating and revalidating a Process Hazard Analysis (PHA).