In November of 2007, Hammaker Ltd., an asphalt company located outside the boundary of the parkâs Fort Darling unit, released large amounts of styrene/butadiene copolymer latex mixed with water into a park stream and the James River while switching out tanks at their plant. The company subsequently paid thousands for an EPA cleanup contractor to clean the spill site and conduct water quality testing. Last month, they also paid $4,517 in restitution to the park. The case was handled as a 16 USC 19jj investigation, with assistance provided by environmental response damage assessment personnel in the Washington Office. The park also worked with the Virginia Department of Environmental Quality to tighten the companyâs Virginia pollution discharge elimination system permit.