Invited Luncheon Speaker - September 4, 2007 - Larry Kinsman - Orin Remediation Technologies

Ex-Situ Chemical Oxidation of Pentachlorophenol at a Former Manufacturing Facility in Lester Prairie, Minnesota

Abstract
The project used ex-situ chemical oxidation methods to successfully remediate soils contaminated with creosote compounds at a former wood frame manufacturing plant in Lester Prairie, Minnesota. Two onsite areas, Location One and Location Four, were selected for remediation using two differing treatment chemistries, Iron-activated Hydrogen Peroxide (Fenton’s Reagent) and Alkaline-activated Sodium Persulfate, respectively.

Prior to conducting onsite remediation, bench-scale testing was performed using representative samples from Locations One and Four and both treatment chemistries. Bench-scale testing allowed ORIN to evaluate different treatment chemistries and dosage rates for optimal contaminant oxidation of pentachlorophenol. The Fenton’s Reagent successfully treated the soil from Location One but was unable to treat soil from Location Four, even after multiple applications, due to high petroleum concentrations. However, the Sodium Persulfate chemistry successfully treated soil from Location Four in one application and therefore was subsequently chosen for full-scale remediation.

Subsequent to bench-scale testing, onsite ex-situ remedial activities were implemented. Ex-situ remediation consisted of spraying the treatment chemistry directly onto the contaminated soil while simultaneously mixing the soil using an excavator within the excavation. The soil was fully saturated with treatment chemistry to ensure contact with contaminants. At Location Four, the lime catalyst was added as a solid and subsequently mixed.

Results from Location Four are summarized in the chart below. The lime used for alkaline-activation served a dual purpose: it catalyzed the creation of the sulfate radical necessary for oxidation by increasing soil pH while desorbing the pentachlorophenol from the creosote.

Biography
Larry has several years of experience as a geologist and hydrogeologist in project design, cost estimation, field supervision, and technical support of environmental remediation projects for industrial, government, military, and municipal concerns. His experience includes design and implementation of soil vapor extraction, air sparging, bio-venting, groundwater recovery, chemical oxidation, and separate phase product recovery systems. Larry has also been involved in training regulatory agencies and foreign governments on numerous subjects including remediation technologies and treatment chemistries.

Larry has participated in several remedial investigations of leaking underground storage tanks at former industrial sites. Larry served as Technologies Director of the Innovative Technologies Group which specializes in in-situ and ex-situ chemical oxidation of recalcitrant organics using peroxy compounds - such as hydrogen peroxide (Fenton's chemistry), potassium and sodium permanganate, sodium persulfate, and calcium peroxide - in soils and groundwater. Larry has assisted in the design, planning, and implementation of numerous field operations. He is also responsible for the design, construction, and maintenance of the ORIN injection vehicles.

Larry has also assisted in the development of treatment chemistries used for the destruction of organic and inorganic contamination. As a result of this work, Larry has been awarded two patents pending for the development of chemistries to destroy organic compounds.

In 1995 Larry received his B.S. in Environmental Geology and Earth Resources from the University of Wisconsin - Eau Claire