From press release Aug. 7 by the Bay Area Air Quality Management District: "The results of our lab analysis of air samples from the Chevron fire show levels of ... potentially toxic pollutants to be well under their reference exposure levels or RELs, and not a significant health concern. These concentrations were similar to the 'background' levels measured throughout the Bay Area by our monitoring network."

The map above shows the sites of the samples taken by Chevron (blue), the air quality district (yellow) and Contra Costa County Health Services (red ). The document below is the results of the analysis.