#	Letters of Interpretation
1	11/03/2023 - 1910.1020(d)(1)(ii) - Retention of atmospheric monitoring records for a permit-required confined space
2	05/26/2006 - 1910.1020(d)(1)(ii) - Requirements for maintenance of employee exposure records and alternative methods for long-term retention.
3	08/01/2002 - 1910.1020(d)(1)(ii) - Record retention requirements for indoor air quality documents and reports
4	04/01/1999 - 1910.1020(d)(1)(ii) - Maintenance and preservation of employee exposure records
5	01/13/1986 - 1910.1020(d)(1)(ii)(B) - Maintaining MSDSs on a computer data base.