Modular 12.6L/sec treatment systems were installed at the two source areas. Groundwater is extracted via wells, passes through pre-treatment media to remove ﬁne solids, volatile organic compounds (VOCs), semi-volatile organics (SVOCs) and total organic carbon. The pre-treated water then passes through ECT2’s proprietary SORBIXTM RePURE regenerable resin to remove PFAS compounds and ﬁnally through specialty SORBIX PURE resin which acts as a ﬁnal polish, targeting shorter chain PFAS compounds. Treated water is then directly reinjected into the aquifer via separate well networks at each location. A central SORBIX RePURE regeneration system services both the FTA and FSA systems.
The FTA and FSA treatment systems were commissioned in December 2018 and March 2019, respectively. The regeneration system has been operational since April 2019. The lead/lag conﬁguration, multiple electronic failsafe features and remote monitoring capabilities have helped the water treatment systems achieve an uptime of over 98% during 24/7 operation. By early February 2021, the treatment systems had treated over 1.2 billion litres of groundwater, and the regeneration system had completed four regenerations of SORBIX RePURE resin, which would have otherwise had to be sent off-site for further treatment and disposal. There have been no exceedances of the established treated water criteria.