May
"The International Conference on Remediation of Chlorinated and Recalcitrant Compounds is the world’s largest and most comprehensive meeting on the application of innovative and existing technologies and approaches for characterization, monitoring and management of chlorinated and complex sites. The 2014 Conference was attended by 1,650 environmental professionals representing universities, government site management and regulatory agencies, and R&D and manufacturing firms from 28 countries. ... The 2016 technical program will address the full range of technologies that can be used to remediate sites contaminated by chlorinated and other recalcitrant compounds."
-- battelle.org