# Standard Interpretations
1 - 1926.651(c)(1)(i) - Can a person who qualifies as a "competent" person under one section of support P also qualify as a competent designer of structural ramps under 1926.651(c)(1)(i)?.
2 - 1926.651(c)(2) - Removing ladders during trenching activities; compliance with 29 CFR 1926.651(c)(2).
3 - 1926.651(e) - Whether it is permissible for an employee to remain in a trench box when materials are being lowered into it by a backhoe.
4 - 1926.651(i)(1) - 29 CFR 1926.651(i)(1); excavation operations.
5 - 1926.651(b)(2) - OSHA jurisdiction over oil and gas pipelines may be preempted by DOT standards.
6 - 1926.651(d) - Requirements for use of high-visibility warning garments by construction workers in highway work zones.
7 - 1926.651(c)(2) - Evaluation of the use of aluminum forms as an exit route from trench excavations
8 - 1926.651, 1926.651(c)(2) - Evaluation of the use of aluminum forms as an exit route from trench excavations
9 - 1926.651(b)(3) - Use of hydro-vacuum excavation equipment and other acceptable means to locate underground utility installions.
10 - 1926.651(b)(2) - Use of hydro-vacuum excavation equipment and other acceptable means to locate underground utility installions.
11 - 1926.651, 1926.651(b)(2), 1926.651(b)(3) - Use of hydro-vacuum excavation equipment and other acceptable means to locate underground utility installions.
12 - 1926.651(f) - Clarification concerning fall protection and vertical walled trenches with depth of 6 feet or greater and use of controlled access zones.
13 - 1926.651(b) - Clarification of utility "owner" as used in the Safety and Health Standards for Excavations, Underground Installations.
14 - 1926.651(b)(2) - Clarification of utility "owner" as used in the Safety and Health Standards for Excavations, Underground Installations.
15 - 1926.651(b)(2), 1926.651(b), 1926.651 - Clarification of utility "owner" as used in the Safety and Health Standards for Excavations, Underground Installations.
16 - 1926.651(g) - Application of the Confined Spaces Advisor to construction; personal fall arrest system requirements.
17 - 1926.651(j) - Requirements to prevent trench collapse during sheet-pile operations.
18 - 1926.651(j)(2) - Trench shield must extend 18" above excavation walls when below grade.
19 - 1926.651 - Use of explosion proof certified equipment inside of pipes and manholes.
20 - 1926.651(l) - Fall protection requirements where employees are required or permitted to cross over excavations.
21 - 1926.651, 1926.651(l), 1926.651(l)(1) - Fall protection requirements where employees are required or permitted to cross over excavations.
22 - 1926.651(g) - Soil testing for excavations and confined spaces.
23 - 1926.651(h) - Construction standards addressing excavations.
24 - 1926.651 - Requirement for Air Sampling in trenches.
25 - 1926.651 - Clarification of Standards
26 - 1926.651(g)(2)(i) - Limitation on Enforcement of Certain Subsections of the Excavation Standard.
27 - 1926.651(g)(1)(iii) - Limitation on Enforcement of Certain Subsections of the Excavation Standard.