2009 California Health and Safety Code - Section 12150-12151 :: Chapter 6. Storage

12150.  Except for explosives kept only at an explosive
manufacturing plant, no person shall possess, keep, or store any
explosive which is not completely encased in a tight metal, wooden,
or fiber container, or a container approved by the Interstate
Commerce Commission.
   No person having any explosives in his possession or control shall
under any circumstances permit or allow any grains or particles of
such explosives to be or remain on the outside of, or about, the
containers in which such explosives are kept.

12150.5.  Every person having any blasting caps (electric or
nonelectric) in his possession or control shall keep the same
securely deposited in a locked approved magazine, except when taken
therefrom for actual use, transportation, or sale.

12151.  Except while in the custody of a common carrier or in course
of transportation pending delivery to a consignee, all explosives
shall be kept or stored as specified in the rules or regulations
adopted by the State Fire Marshal pursuant to this part.