Several other speakers commented that greater power for workers in the refinery is key to making plant run safety. Communities for a Better Environment, which has a long track record of fighting Chevron on safety issues, last year issued a certificate of recognition to the Chemical Safety Board for its reports. CBE senior scientist Greg Karras, while praising the report's findings and recommendations, urged the board to amend its recommendations to put more emphasis on the need to monitor the quality of crude oil being refined as well as the materials used in refinery equipment. Karras noted that crude oil refined in California keeps increasing in sulfur content and that Chevron's recently approved "modernization plan" will allow the refinery to process higher-sulfur crude. He urged regulators to require careful analysis before approving any change in "feed stock."