Licensing

California State Contractors License number 105993.
C.H. Stone holds licenses in California for:

* C-36 (Plumbing)
* C-20 (Heating)
* C-16 (Fire Protection)
* A- (General Engineering)
* B- (General Contracting)

Nevada State Contractors License number 0043617.
C.H. Stone holds licenses in Nevada for:

* C-1 (Plumbing and Heating)
* A15 (Sewer, Drains and Pipes)
* A19 (Pipeline and Conduits)

Certification
85% of all journeymen employed by C.H. Stone have certification for medical gas installation and competent person pertaining to underground safety.

Association Membership
All field employees belong to the National Association of Plumbers and Pipe Fitters as governed by the Plumbing and Piping Industry of Southern California.