Confidential Site, NY – Environmental Remediation
Langan provided environmental remediation services for the redevelopment of a large former distribution center site into a new mixed-use space. Langan’s environmental team performed soil, soil vapor, and groundwater sampling analysis, as well as prepared a conceptual site model. Groundwater at the site was impacted with both petroleum-related and chlorinated volatile organic compounds (VOCs). Langan recommended a combined remedial approach entailing the direct injection of NaOH-activated persulfate followed by the injection of liquid activated carbon (PlumeStop®) through a network of underground piping below the new building slab. The on-going performance monitoring showed that the process resulted in complete removal (100%) of all petroleum related VOCs and two orders of magnitude reduction of chlorinated VOCs.