During the morning hours of Tuesday, November 13th, the parkâs natural resource specialist discovered large amounts of foam in a creek in the parkâs Fort Darling unit. The foam was found throughout most of the creek, which drains into the James River. A unified command was set up with Chesterfield County, the Virginia State Department of Environmental Quality, and the Environmental Protection Agency. Investigators determined that an asphalt plant near the Fort Darling unit had released large amounts of styrene/butadiene copolymer latex mixed with water while switching out tanks at their facility. The chemical is used as a bonding agent in manufacturing asphalt. A cleanup contractor began working at the spill site on Wednesday and was scheduled to finish up on Thursday. EPA hired another contractor to oversee the cleanup operation. The unit has been closed to the public. An investigation is underway.