Kansas Department of Health and Environment, 68pp, 2019

KDHE has selected in situ thermal treatment, direct groundwater recirculation (DRG), emplaced permeable reactive barriers (PRBs), and injected PRBs as part of the preferred remedy for the former Schilling AFB site. Thermal treatment will be conducted on two TCE plumes. Vapor extraction wells will be colocated among the thermal wells to remove and treated vapors using granular activated carbon prior to discharge. DRG will be implemented at OU 1 and OU 2 through ~57 extraction wells and 199 injection wells to help meet remedial goals of the site. The emplaced PRB installed at Plumes F₁ and G using using cut-and-fill trenching methods. The exact dimensions and placement of the barrier will be determined during the pre-design data acquisition activities. Injected PRBs will be installed at the leading edges of Plumes D, E, F, F₃, and G and will be composed of ZVI (30-35%) mixed with xanthan gum and water. The total present value cost of the total preferred remedy is $95,210,000. https://www.kdheks.gov/remedial/Schilling_AFB/Schilling_CAD.pdf