Gary Simpson, AST Environmental project manager, explains the purpose of the pipes used in the Enhanced Environmental Cleanup Technology, BOS 100® Treatment Barrier project as well as how the product works at Sans Souci Farm in Sumter, S.C., March 7, 2019. The BOS 100® Treatment Barrier, also known as a “trap and treat” in-situ remediation technology, soaks up chlorinated solvents like a sponge, “trapping” it, then “treating” the contaminant and its by-products by quickly degrading them to harmless amounts. (U.S. Air Force photo by Senior Airman Ashley Maldonado)