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California Code of Regulations
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Chapter 4. Division of Industrial Safety
Subchapter 17. Mine Safety Orders
Article 32. Gases in Mines
Underground
Underground
State of California
7102
Dangerous Accumulation of Gases.
7103
(21-1). Gassy Mine Classification.
7104
Tests for Gases.
7105
Mechanical and Electrical Equipment for Gassy Mines.
7106
(21-2)-(21-100). Gassy Mine Operation.