This order pertains to the mining property located on Morgan Territory Road in the city of Clayton, California. The property consists of the Mt. Diablo Mercury workings including tailings, ore piles and waste rock. This order requires Sunoco, Inc. to conduct removal actions to abate an imminent and substantial endangerment to the puclic health, welfare or the environment that may be presented by the actual or threatened release of hazardous substances at or from the property.