06/15/2025
From Point Isabel group -
By Mary Barnsdale
SERIOUS "NO DIGGING" RULE AT CESAR CHAVEZ PARK: Fyi, the ongoing investigation into radiation and methane at the landfill that eventually became Cesar Chavez Park in Berkeley has led to a complete prohibition on anything that might disturb the soil there. That includes planting, weeding, and dogs digging.
This could take a while to resolve. Don't let dogs dig...the city wouldn't have any choice but to close the off-leash area.
All of this was triggered by 1) issues with the methane collection at Cesar Chavez Park, which was a former city garbage dump, and 2) the revelation last year that alum mud, a byproduct of making aluminum, might have been dumped there about 50 years ago. Alum mud is radioactive.
Point Isabel doesn't have any issues with methane nor alum mud, as far as anyone knows. The issue at PI has been lead and zinc. There was a major cleanup in the mid-1980s. The small, fenced-off areas on North Point Isabel have tested positive for lead in recent years, though, and that will need to be addressed. (Probably next year, when EBRPD will probably recap North PI. That project has been delayed for several years.) Point Isabel is considered safe for recreation but never let dogs dig. It can't be good for them -- and anything that's buried should stay buried.
For what it's worth, my layperson understanding about Cesar Chavez Park is that recent testing for radiation found nothing of concern at ground level; the park is considered safe for people and pets. I *think* they're still working to get the methane collection system working properly, but that's also not a threat to park users. The current concern seems to be because groundwater samples taken far below the surface did come back positive for radium. That's not really a threat to recreational users, but ANY messing about with the clay cap at the surface violates environmental safety guidelines and could theoretically put city workers in danger of being exposed. Berkeley is working on how to fix this.