Cal. Code Regs. tit. 8, § 6577
(a) The cellar(s) at every well shall be provided with entrances and exits as follows:
(1) The entrance to the bottom of a multiwell cellar that is greater than two and one-half feet (2 1/2′) deep shall be by means of a stairway and shall terminate in an unobstructed area at the cellar floor. The entrance shall be at least three feet (3′) wide and shall have a vertical clearance of at least six and one-half feet (6 1/2′). The entrance to the bottom of a single well cellar that is greater than two and one-half feet (2 1/2′) deep shall be by means of a fixed or secured portable ladder or a stairway.
(2) Exit from the top of the ladder leading from the cellar, or from the top of the cellar wall where no ladders are required, shall be provided by one of the following means:
(3) The passageway under the derrick or mast floor shall be at least two feet (2′) wide.
Where the height of the substructure and necessary placement of equipment does not permit a full six and one-half feet (6 1/2′) vertical height above ground level, the maximum height available shall be used, but in no case shall it be less than four feet (4′) above the ground level.
Beams of the substructure and pipe lines may be permitted horizontally across the passageway at ground level if an unobstructed vertical clearance of at least three feet (3′) above such beams or pipe lines is maintained. Beams of the substructure or pipe lines shall not be permitted longitudinally within the two feet (2′) width of the passageway.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment of section and new Note filed 5-8-95; operative 6-7-95 (Register 95, No. 19).