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# Standard Interpretations
1 2009 - 10/13/2009 - Protective system requirements for excavations that will not be entered by employees.
2 2003 - 12/22/2003 - Registered professional engineer approval requirements for combination trench shield and sloping system trenches with a depth greater than 20 feet.
3 2003 - 11/14/2003 - Permissibility of installing a trench shield so that the top is flush with the surface.
4 2003 - 01/16/2003 - Registered professional engineer approval requirements for manufactured trench protection systems deeper than 20 feet.
5 2001 - 09/21/2001 - Clarification of utility "owner" as used in the Safety and Health Standards for Excavations, Underground Installations.
6 1996 - 02/01/1996 - Clarification of house foundation/basement excavation;Fall protection requirements.
7 1995 - 09/07/1995 - Concerns with the OSHA June 30 memorandum concerning the application of 29 CFR 1926.652 to house foundation/basement excavations.
8 1995 - 04/05/1995 - Whether or not organic rock, such as "Miami oolite rock" should be considered by OSHA as "stable rock".
9 1994 - 03/28/1994 - Safety Procedures During Gunite and Shotcrete Pool Construction.
10 1993 - 02/19/1993 - Plywood as a substitute for meeting the standard.
11 1992 - 05/21/1992 - Design of Protective Systems in Trenches.
12 1992 - 05/21/1992 - Design of protective systems for employees working in trenches.
13 1992 - 05/05/1992 - Excavation standards relating to aluminum rail.
14 1992 - 04/15/1992 - Use of plywood for shoring and support systems in trenches and excavations.
15 1991 - 12/02/1991 - Standards addressing excavations
16 1991 - 10/01/1991 - Classification and subsequent designs may be used if they have been approved by a registered professional engineer.
17 1991 - 06/05/1991 - Testing of type C soil is not necessary if employees are adequately protected.
18 1991 - 01/09/1991 - Clarification of Standards
19 1984 - 10/02/1984 - Interpretation of 1926.652, Table P-2
20 1980 - 08/04/1980 - Specific Trenching Requirements.
21 1976 - 09/14/1976 - Specific trenching requirements as it pertains to shoring.
22 1975 - 11/18/1975 - Clarification of excavations, trenching, and shoring standards.

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