North Carolina Dept. of Environmental Quality, NCD071574164, 267 pp, 2017

The cleanup area and joint remediation effort encompasses the City of High Point's landfill site adjacent to Seaboard Chemical's closed treatment, storage, and disposal facility. The landfill is now capped and maintained under an approved post closure plan. The site is affected by chlorinated and non-chlorinated organics, DNAPL (ethenes, ethanes, and others), and 1,4-dioxane in the shallow and deep groundwater and landfill leachate. The most effective long-term method to accomplish the hydraulic containment of the plumes and treatment of the groundwater and leachate collected at the site was determined to be shallow and deep groundwater extraction in conjunction with leachate recovery and treatment in physical and natural systems. The main physical treatment area encompasses the AOP unit, settling vat effluent filters, water chemistry lab, and effluent storage tanks. Prior to being pumped to the cap of the landfill for phytoremediation, the leachate and groundwater from the extraction wells go through the clarifier (for solids to settle), aeration/filtration treatment removes metals, and an air stripper reduces the organics concentration. A 33-acre stand of mainly pine tree species is maturing on the landfill cap. http://edocs.deq.nc.gov/WasteManagement/0/edoc/686219/NCD071574164_%20Seaboard%20Chemical%20Construction%20Completion%20Report_20170517.pdf