Case Study – Challenges Encountered during Concurrent Implementation of Remedial Strategies at a Solvent Site
- Chemical desorption of petroleum by-products required a change in the SVE monitoring program to address the increase in contaminant vapor stream waste loading.
- Recovered steam contained more sediment than anticipated which complicated condensate treatment and disposal.
- Heavy rainfall during the winter of 2016-2017 caused groundwater elevations to rise above a semi-confining layer, complicating vapor control and contributing to desorbed contaminant migration beyond the initial capture zone.
Positive effects have also been observed with the addition of ERH into the remedial strategy. These include:
- Warmer groundwater temperatures induced by ERH have allowed dehalococcoides bacteria colonies to thrive.
- Lateral spread of the inoculants injected during ERD near the Source Area appears to have extended beyond the application area.
Our collaborative working relationship with the ERH contractor allowed real-time solutions to challenges in treatment, waste capture, and monitoring methodologies, leading to a successful project.