#	Standard Interpretations
1	11/27/2013 - 1926.800(t)(1)(vii) - Regarding the type of hook that is permitted when a crane is used to hoist personnel during underground construction work
2	10/01/2010 - 1926.800(a)(1) - Applicablity of Subpart S to tunnels contructed by auger boring.
3	10/01/2010 - 1926.800, 1926.800(a)(1) - Applicablity of Subpart S to tunnels contructed by auger boring.
4	07/16/2008 - 1926.800(s)(3) - Oil-filled transformers and underground construction.
5	11/29/2002 - 1926.800(r)(13)(ii) - Typographical error in internet text of 1926.800(r)(13)(ii).
6	11/29/2002 - 1926.800, 1926.800(r)(13)(ii) - Typographical error in internet text of 1926.800(r)(13)(ii).
7	08/08/2002 - 1926.800(d) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
8	08/08/2002 - 1926.800(k)(4) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
9	08/08/2002 - 1926.800(a)(1) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
10	08/08/2002 - 1926.800, 1926.800(a)(1), 1926.800(k)(4), 1926.800(d) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
11	05/23/2001 - 1926.800 - Construction standards for equipment such as Shuttle Buggy.
12	05/03/2001 - 1926.800(f)(1) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
13	05/03/2001 - 1926.800(e) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
14	05/03/2001 - 1926.800(g)(2) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
15	05/03/2001 - 1926.800(a) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
16	05/03/2001 - 1926.800(f)(5) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
17	05/03/2001 - 1926.800(c) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
18	05/03/2001 - 1926.800, 1926.800(c), 1926.800(f)(5), 1926.800(a), 1926.800(g)(2), 1926.800(e), 1926.800(f)(1) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
19	11/03/2000 - 1926.800 - Application of the Confined Spaces Advisor to construction; personal fall arrest system requirements.
20	03/13/2000 - 1926.800(l)(2) - Tunnel illumination requirements.
21	03/13/2000 - 1926.800(g)(4) - Tunnel illumination requirements.
22	05/28/1998 - 1926.800 - Numerous clarifications regarding underground construction;variances; joint ventures.
23	01/10/1997 - 1926.800(m)(5) - Use of gasoline in underground construction.
24	03/15/1996 - 1926.800 - Fire prevention and protection requirements applicable to underground construction.
25	08/08/1994 - 1926.800 - Wedge Sockets Wire Rope Clips (Piggy-Back Clip).
26	07/26/1994 - 1926.800 - Wire rope clips in conjunction with wedge sockets.
27	12/09/1993 - 1926.800(s) - Tunnel boring machine equipment.
28	07/24/1993 - 1926.800 - Definition of Potentially Gassy Atmosphere.
29	08/19/1992 - 1926.800 - Cage, skip and load connections to hoist ropes.
30	05/20/1992 - 1926.800 - Use of liquefied petroleum gas (LPG) underground.
31	05/05/1992 - 1926.800 - Transportation of compressed gas chambers
32	07/08/1991 - 1926.800(s)(1) - Protection of flexible cords when hung in tunnel shafts.
33	03/27/1991 - 1926.800(h) - Clarification of approval requirements for equipment to classify underground construction operations as potentially gassy
34	03/06/1991 - 1926.800(g)(5) - A rescue team is required during all phases of underground construction operations in a tunnel.
35	01/29/1991 - 1926.800 - Rehabilitation of a sewer tunnel constructed in the years between 1926 and 1932
36	09/23/1980 - 1926.800 - Cut and cover construction.
37	03/21/1980 - 1926.800(h)(2)(iii) - Interpretation on testing requirements for grouted tunnel rock bolts
38	02/17/1978 - 1926.800 - Safety aspects of personnel and material hoists.
39	01/31/1978 - 1926.800(k)(10)(i) - Cut-and-cover operation in the construction of tunnels.
40	11/16/1977 - 1926.800(c) - Positive identification of persons working underground in tunnels and shafts, caissons, cofferdams, compressed air tunnels.
41	07/19/1976 - 1926.800 - Cut-and-cover operation regulations of Excavation, Trenching, and Shoring.
42	04/19/1976 - 1926.800(c) - Use of Mapp gas, oxygen, and acetylene in a tunnel.
43	04/16/1976 - 1926.800 - Methylacetylene-propadiene, stabilized, by definition, is not a liquefied petroleum gas, but is considered as a fuel gas
44	04/15/1976 - 1926.800 - The handling, Storing and Use of MAPP Gas in Underground Construction Work.
45	11/11/1975 - 1926.800(k)(2) - Supplied air and ventilating air requirements.
46	07/07/1975 - 1926.800 - Clarification of 29 CFR 1926.350(b)(4) to Permit Cylinders Containing Oxygen, Acetylene or Other Fuel Gas to be Taken into Tunnels
47	04/30/1975 - 1926.800 - Cut and cover tunneling operations.