Robin Williams' ashes were scattered in San Francisco Bay on August 12, the day after his death, Radar reports. The information was listed on his official death certificate, TMZ reports, noting that the certificate doesn't list cause of death yet; it simply says "pending investigation." The coroner is waiting for toxicology results, expected in a few weeks, to see if there were any chemicals in Williams' system. Williams lived in the Bay Area for decades, the New York Daily News reports, and now locals are petitioning to rename a famous rainbow-painted tunnel in the area after the actor. (More Robin Williams stories.)