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Thermal DNAPL Source Zone Treatment Impact on a CVOC Plume
Author(s) -
Heron Gorm,
Bierschenk John,
Swift Robin,
Watson Robert,
Kominek Michael
Publication year - 2016
Publication title -
groundwater monitoring and remediation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 47
eISSN - 1745-6592
pISSN - 1069-3629
DOI - 10.1111/gwmr.12148
Subject(s) - plume , petroleum , environmental science , groundwater , hydrocarbon , total petroleum hydrocarbon , petroleum engineering , soil vapor extraction , water source , environmental engineering , waste management , contamination , chemistry , geology , geotechnical engineering , soil water , soil contamination , soil science , environmental remediation , engineering , ecology , physics , water resource management , organic chemistry , biology , thermodynamics
The tetrachloroethene ( PCE ) source zone at a site in Endicott, New York had caused a dissolved PCE plume. This plume was commingled with a petroleum hydrocarbon plume from an upgradient source of fuel oil. The plume required a system for hydraulic containment, using extraction wells located about 360 m downgradient of the source. The source area was remediated using in situ thermal desorption ( ISTD ). Approximately 1406 kilograms (kg) of PCE was removed in addition to 4082 kg of commingled petroleum‐related compounds. The ISTD treatment reduced the PCE mass discharge into the plume from an estimated 57 kg/year to 0.07 kg/year, essentially removing the source term. In the 5 years following the completion of the thermal treatment in early 2010, the PCE plume has collapsed, and the concentration of degradation products in the PCE ‐series plume area has declined by two to three orders of magnitude. Anaerobic dechlorination is the suspected dominant mechanism, assisted by the presence of a fuel oil smear zone and a petroleum hydrocarbon plume from a separate source area upgradient of the PCE source. Based on the post‐thermal treatment groundwater monitoring data, the hydraulic containment system was reduced in 2014 and discontinued in early 2015.