RMT, Inc.

The production of coal-fueled gas over the last two centuries has presented extraordinary challenges at manufactured gas plant (MGP) sites throughout the U.S. Many owners of MGP sites face the task of identifying and reducing their environmental liabilities, with the added challenge of financing the necessary environmental cleanups. This is no easy feat when many regulatory guidelines are still in a state of flux.

NAPL Migration from Sediment – A Difficult Issue
NAPL (Non-aqueous Phase Liquid) migration from sediment is increasingly being recognized as a problem at a number of MGP sites throughout the country. At former sewer outfalls, NAPL migration commonly occurs because methane generated in organic-rich sediment creates bubbles that cause migration of MGP tars from the sediment—where there is little potential for human exposure—to the surface of rivers and lakes—where there is considerably more exposure risk. This migration pathway is complex and, at a number of sites, standard remedies (e.g., dredging and sand caps) have failed to control NAPL concerns.

RMT's Unique Approach
RMT has extensive experience with remedy development for NAPL migration from sediment. From initial consultation and site investigation, through turnkey design and construction, RMT offers a single point of contact to create a cost-effective remediation solution.

RMT has developed a unique technology (patent pending) designed to permanently and predictably control NAPL migration from sediment and to minimize your long-term costs and risks. In our capping system, an impermeable layer traps migrating NAPL and redirects it to a location where it can be safely collected and treated and the gas is vented to the atmosphere. This proprietary remedy offers design life certainty and eliminates your health, ecological, and business risks going forward.

RMT's Unique NAPL Migration Control System
(click diagram for larger view)