In the state of CA, unincorporated cities/townships fall under the authority/jurisdiction of the Building Standards Commission and the Division of the State Architect. In such cases, CPC 608.5 defines the requirements for the termination of the discharge piping - not more than two (2) feet (610 mm) nor less than six (6) inches (152 mm) above the ground.
Most areas I know of in CA, follow this code as part of the 2001 California Code of Regulations, Title 24.
Your reference is from the International Plumbing Code (IPC) which is part of the International Residential Code (IRC). I don’t know of any jurisdictions in CA that follow the “I” codes.
Is the OC following the I codes?