Mining and Tunneling – San Bernardino District Office. Diane Fionda, Senior Safety Engineer. 464 W. 4th Street, Suite 354. San Bernardino, CA 92401. Phone: (909) 383-6782. Fax: (909) 388-7132. To report a work-related injury, illness, or fatality, if you cannot call, you may use email: caloshaaccidentreport@tel-us.