Valero Energy Partners’ Houston refinery suffered a hurricane-related spill Aug. 27 from a light crude storage tank, the Environmental Protection Agency said. The chemical plant that released a cloud of a carcinogenic chemical amid Hurricane Harvey and its aftermath in Houston’s Manchester neighborhood in August emitted far more of the chemical than it had previously disclosed, environmental regulators said Thursday. The plant, Valero Energy Partners ’ Houston refinery, suffered a hurricane-related spill Aug. 27 from the damaged roof of a light crude storage tank, the U.S. Environmental Protection Agency concluded in an investigation. Valero initially reported to the state that because of the spill, seven pounds of the carcinogenic chemical benzene were released into the air. Subsequently, Valero “has informed the EPA that it believes it significantly underestimated the amount of [volatile organic chemicals] and benzene released in its original report to the State of Texas Environmental Electronic Reporting […]