Client: Simultaneous Treatment of Eight Source Zones

Location

Memphis, TN

Contaminants

Mix of CVOCs

Volume

49,800 cy

Goal

Reduce CVOC concentration to 1 mg/kg

Number of Heaters

397

Mass Removed

12,500 lbs.

Technologies

Important Project Details

  • Approach: Energy was delivered through the thermal conduction heater borings and vapors were extracted from 68 vertical vacuum wells. A vapor extraction and capture system, including a surface cover and vertical vacuum wells next to heater borings, provided for effective pneumatic control and capture the CVOC vapors. A central treatment system, based on condensation and granular activated carbon filtration, was used to treat the vapors.
  • Results: Post-treatment soil sampling results showed that the remedial goals were achieved in all 8 treatment areas. Soil concentrations of all contaminants were reduced from over 1,000 mg/kg (indicating the presence of DNAPL) to below 1 mg/ kg in all samples.

What Makes this Project Unique

TCH was utilized to simultaneously treat eight separate source zones containing chlorinated solvents in tight loess (silt/clay) above the water table. Turn-key unit treatment cost, including all utilities, was $79 per cy.
This project received the 2009 Secretary of Defense Environmental Award.

Contact Info

John Haas

Phone: 781-733-6042
Email: jhaas@cascade-env.com