This document summarizes a study on using hybrid poplar trees and their associated endophytic microbes to remediate trichloroethylene (TCE) and derivatives from contaminated groundwater. Researchers screened poplar endophytes and identified one that could degrade TCE into chloride ions. Field tests showed poplar trees inoculated with this endophyte had higher chloride levels in soil, indicating TCE degradation, compared to uninoculated trees. Monitoring wells near inoculated tree plots also showed decreasing TCE and PCE levels over time, demonstrating the endophyte-assisted phytoremediation approach.