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Paul Lear
Paul Lear

Technical Director
Forgen

Dr. Lear has over 20 years of experience in the environmental remediation industry which includes leading multi-disciplinary teams in the completion of over 300 projects in the arenas of bioremediation, chemical oxidation, dewatering, soil washing, stabilization/solidification, thermal desorption and water treatment for hazardous, toxic and radioactive wastes. Dr. Lear is an internationally recognized expert in the stabilization/solidification. He has been involved in the treatment of over 2.5 million cubic yards of sediments, soils, and sludges.


POSTER PRESENTATION

In-Situ Stabilization of Soils Contaminated with Volatile Organics – Controlling Vapors

As part of the redevelopment of a former industrial facility in Newark, CA, treatment of volatile organic contaminated soils were required. The primary contaminant of concern at the site was ethylene dibromide. ISS treatment was performed using a deep soil mixing DSM rig,consisting of a crane; drill platform; Kelly Bar; and a 10-foot diameter auger. Forgen utilized a 12-foot diameter shroud which was suspended from the Hain platform with the Kelly bar penetrating the center access hole. The shroud was connected to the VOC vapor control system, consisting of a particle filter, two 8 foot diameter vapor phase carbon adsorbers (in lead-lag configuration) and a 40 hp, 230/460 V, 3 phase, TEFC blower (3,500 cfm @ 43” wc). All adsorbers were charged with 4,000 pounds of virgin coconut shell vapor phase activated carbon. Sampling ports were available between the carbon adsorbers and after the lag adsorber to allow breakthrough monitoring.


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