Town Creek Greenway Project
The Tennessee Department of Environment and Conservation’s (TDEC) Division of Underground Storage Tanks is partnering with the City of Gallatin on a long-term clean-up effort to remediate petroleum contamination that has been identified seeping from along the eastern bank of Town Creek Greenway.
The mission of TDEC’s Division of Underground Storage Tanks is to protect human health and the environment by remediating existing contamination and preventing future petroleum releases.
Investigation & Remediation Efforts
TDEC and its state contractor have conducted initial response and monitoring activities in the area of the Town Creek Greenway and the adjacent residential neighborhood. Initial environmental investigations and a dye trace study were conducted at two currently active Underground Storage Tank (UST) facilities between December 2018 and May 2019.
High resolution investigations, a second dye trace study, and geophysical surveys were conducted between September 2019 and September 2020 at two former and four currently active UST facilities along East Main Street and Hartsville Pike.
Additional investigations were also conducted in and around the Town Creek Greenway and in the adjacent residential neighborhood. Interim seep flow control/mitigation was also conducted and is ongoing in specific key areas. Utilizing the data collected during the investigations, interim remediation actions were conducted in the neighborhood between July 2020 and August 2020 in an attempt to mitigate odors in and around the Greenway.
Remedial design investigations and an expanded geophysical survey are scheduled to be conducted in June 2021 at two currently active UST facilities in the vicinity of the Greenway and residential neighborhood. All data collected to date, subsequent data, and the findings of ongoing Advanced Data Analyses (ADA) shall be utilized to determine appropriate remediation method(s). After the additional investigation data and analyses are reviewed, TDEC and its state contractor shall develop a comprehensive clean-up plan in the form of a Corrective Action Plan (CAP) for any contaminated areas and source areas that have been identified. The CAP will also include implementation time frame(s) and a sampling and monitoring plan.
The investigation activities have and will include:
- Historical research, site reconnaissance, and surveying;
- Testing USTs, piping and other equipment used to store and dispense gasoline and other petroleum products;
- Drilling soil borings and soil sample collection;
- Installation of groundwater monitoring wells to sample ground water and determine flow direction;
- High resolution soil and groundwater sampling and laboratory analyses;
- Geophysics to map the structure and possible pathways in the underlying soil and bedrock; and
- Dye-trace testing and stream and seep/spring analyses to determine flow direction and travel time.