EPA Superfund Site

JONES ROAD GROUND WATER PLUME

TX | EPA ID TXN000605460

About this site’s exposure pathways: As of August 2025, the Jones Road Ground Water Plume Superfund site is considered "Human Exposure Not Under Control" (HENC). Exposure pathways continue to exist due to residents dependency on private wells for their domestic water supply within the chlorinated solvent groundwater plume. In 2008, a public water supply line was constructed and 144 residential and commercial properties were connected. Approximately, half the residents chose not to connect to the public water supply and known/potential exposure of the contaminated groundwater persists. The contaminants of concerns are chlorinated solvents, including perchloroethylene, trichloroethene, cis-1,2-dichloroethene, trans-1,2-dichloroethene, and vinyl chloride. The groundwater exposure pathway is considered unacceptable based on EPA risk-based criteria showing contaminant concentrations greater than the maximum contaminant levels (MCLs) in private drinking water wells and surrounding monitoring wells. Currently, the planned activities to address this pathway are continuing to offer connection to the public water supply infrastructure surrounding the site within the greater contaminant groundwater plume area, continuing to implement the Remedial Action of the source area, discussed further below, and starting a supplemental Remedial Investigation / Feasibility Study (RI/FS) to determine the extent of the contaminant plume and the most feasible remedy to restore the groundwater. If you are impacted by risks inherent at this site, consider connecting to the public water supply or requesting testing of your water well to determine if contamination exists within your well, please contact the Remedial Project Manager for details. The EPA currently anticipates human exposure to be under control by the end of September 2028 after the groundwater remedial action is implemented.

In addition, the EPA has implemented several Remedial Actions to address the source area contamination, including installing and operating a Soil Vapor Extraction (SVE) system to mitigate the source area preventing further contaminants from migrating into the groundwater, and multiple injections of in-situ bioremediation around the source area to enhance in-situ degradation of the chlorinated solvents. The EPA has installed Vapor Mitigation Systems on several suites at the commercial shopping center to further mitigate risks associated with vapor intrusion present at the source area.

The EPA completes semi-annual sampling events for groundwater and vapor intrusion. Results are distributed to applicable residential and commercial properties. Currently, participation within the community is minimal for the sampling events and future investigations. The EPA hosted a public meeting on July 17, 2025 to inform the community about the upcoming field investigation and request access to properties.