Project : Thermally Enhanced Soil Vapor Extraction and Bioremediation

Confidential Client – New York

From 1910 to 1997, a seven-acre chemical manufacturing facility in New York produced enamels, insulating varnishes and resins. Due to historic chemical spills, the New York State Department of Environmental Conservation classified the site under the State Superfund Program and split it into two operable units: OU-1 (contaminated groundwater) and OU-2 (contaminated site soils). 

To address contaminated soils, a number of subsurface investigations were completed from 1984 to 2008. Volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) were detected below ground surface. As a result, a NYSDEC Record of Decision identified the proposed remedy for OU-2 as thermally enhanced soil vapor extraction (TESVE). TESVE involves transmitting heat through soils to increase volatilization and promote biodegradation of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). While high temperatures are typically used, this project demonstrated low temperatures were effective for thermal heating. This solution required less infrastructure to implement, significantly reduced impacts to the local community, and in the end, resulted in a cost that was half the high temperature thermal remedy, and 25% of an excavation remedy.

Awards Received:

  • 2019 Engineering News-Record Regional Best Project (Water/Environmental Category)
  • 2020 ACEC New York Engineering Excellence Awards – Platinum Award (Environmental Category)
Services Provided by CHA:
  • Investigation
  • Feasibility Study
  • Remedial Design
  • Construction Oversight
  • Remedial Operations
  • Closeout