A preliminary health assessment found that residents near a refinery face higher cancer and disease risks. The assessment was conducted by the Bay Area Air District, which is responsible for protecting air quality in the region. If the results are confirmed, the refinery's operator will need to implement a plan to reduce health risks or install pollution controls.

The assessment was commissioned because the refinery was identified as a facility that could pose high health impacts. Experts from the agency conducted multiple studies to quantify potential health risks.

Further details about the assessment and its findings are available from the Bay Area Air District.