DNAPL contaminants like TCE can be expected to persist for decades or even centuries

Evidence

System for alleviating DNAPL contamination in groundwater (USPTO)

Categorization

• corroborated: 2 independent passages support this claim
• XREF: connects to: Groundwater contamination like TCE can persist for thousands of years — Jonathan Harr, A Civil Action, 3138; Groundwater contamination persists despite decades of remediation due to back diffusion from low-conductivity zones — Contaminant Back Diffusion from Low-Conductivity Matrices: Case Studies of Remedial Strategies; Persistent, bioaccumulating pollutants made non-biodegradability a public concern — Richard J. Lazarus, The Making of Environmental Law, 305

Related

• Groundwater contamination persists despite decades of remediation due to back diffusion from low-conductivity zones (similarity 0.89)
• Groundwater contamination like TCE can persist for thousands of years (similarity 0.89)