Cristelle Taillon, a project officer with the state parks' grants and local services, said she informed Pinole officials a cell phone tower cannot be built in the park unless the city comes up with a mitigation plan that is approved by the National Park Service.
Taillon also told Pinole officials the now-closed fire station on park land is "not compliant" and they must mitigate its impacts or convert the facility for park use.
Taillon said the restrictions are in place because Pinole accepted federal funds in the 1970s to help purchase the land for Pinole Valley Park.
She added she will put a deed restriction on the land, so there is no confusion in the future.
Pinole City Manager Belinda Espinosa told Patch on Friday that city officials are "conducting due diligence" on the issue and wouldn't have any comment.
The 85-foot cell phone tower was proposed by Verizon Wireless as a way to improve mobile communication service in the region.