California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 18 - Explosive Materials
Article 114 - Storage of Explosive Materials
Section 5257 - Makeup or Primer House for Underground Blasting Operations
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) When 30 or more primers are required for a single round/shot, the primers shall be made up in advance in a makeup or primer house.
(b) When primers are made up and stored in quantities greater than for immediate need, they must be processed in a separate structure that complies with the Type 1 or Type 2 magazine requirements except as follows:
(c) Makeup or primer houses shall be located no closer than 100 feet from any magazine or inhabited building.
(d) Primers not made up in a makeup or primer house shall be made up at the blasting site.
NOTE: This Section does not prohibit primers being made up in a separate building or area, provided that explosives, detonators, and primers are stored in proper magazines.
1.
Amendment filed 10-17-75; effective thirtieth day thereafter (Register 75, No.
42).
2. Amendment filed 7-16-76; effective thirtieth day thereafter
(Register 76, No. 29).
3. Amendment of section heading and section
and new NOTE filed 7-11-2003; operative 8-10-2003 (Register 2003, No.
28).
Note: Authority cited: Section 142. 3, Labor Code. Reference: Section 142.3, Labor Code.
