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Midwestern States Environmental Consultants Association   




August 7th, 2018



Remediation Technologies

Meeting Summary:

At the August MSECA Meeting we will have presentations on different types of remediation technologies with topics that will include in situ, metals, ERH, and more. Presentations will include:

  • Effective Remediation of Multi-Metal Contaminated Sites
  • In Situ Thermal Remediation: Source Zone and Plume-wide Solutions
  • Maximizing the Efficacy of Soil Mixing Technology
  • Performance Advantages of Colloidal Zero Valent Iron Remediation Amendments

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Tuesday, August 7th
12:00pm - 4:30pm

Indiana Government
Center South
(Conference Center Auditorium)
402 W Washington St
Indianapolis, IN 46204

  MSECA would like to thank the following sponsors for their support:





Primary Event Sponsor


Lanyard Sponsor

















MSECA Meeting Registration

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Aug 4th

(After 8/3)


MSECA Consultant Member Registration
Check your company's status at:
$25.00 $50.00

(Please Sign 
Up Onsite)

MSECA Government Member Registration
Government Members can sign up for this event for free.
(Currently IDEM & Indiana Brownfields are both MSECA Members)
$0.00 $50.00


MSECA Student Member Registration
Full time students can sign up for our Student Membership
and attend this event for free.
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Non-Member Registration
Environmental consulting companies can Join MSECA and all employees will receive free or discounted registration to all our educational events.
$75.00 $100.00

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Up Onsite)

MSECA Affiliate Members, along with any suppliers or service providers, are encouraged to join us at this meeting as a Table Exhibitor. For more information on opportunities to exhibit at or sponsor this event please visit:


Presentation Descriptions:

Effective Remediation of Multi-Metal Contaminated Sites

Gary Meyer, Redox Solutions

Former plating sites often involve a process of selecting an additive for soil or groundwater remediation that is effective in treating multiple metals that exceed cleanup goals. At these complex sites, sulfide chemistry is often a candidate given the ability of sulfides to precipitate or otherwise treat multiple cations. This presentation will discuss soluble and insoluble sulfide chemistries as well as biotic and abiotic approaches to ferrous sulfide formation to treat these difficult sites.

In Situ Thermal Remediation: Source Zone and Plume-wide Solutions

Chris Thomas, TRS

The presentation will cover an introduction to electrical resistance and thermal conduction heating (ERH and TCH, respectively) technologies; TRS selection criteria for each; and their attendant post remediation benefits. Chris will include a case study about a recently completed Superfund site, where TRS implemented ERH and TCH simultaneously.

Maximizing the Efficacy of Soil Mixing Technology
Bill Lang, Lang Tool Co

The presentation will cover how to achieve soil mixing accuracy ensuring that soil mixing projects meet the required cleanup criteria. The topics that will be covered include:

  • Using soil mixing equipment and procedures designed specifically for that purpose to produce a homogenous mixture of soil and reagent.
  • Using soil mixing equipment equipped with GPS to achieve uniform reagent distribution.
  • Reagent delivery system requirements to achieve accuracy.
  • Crew audio and video communication systems that contribute to accurate reagent delivery.
  • Using information downloaded from onboard machine computers to enhance reports to regulatory agencies.

Performance Advantages of Colloidal Zero Valent Iron Remediation Amendments
Dr. John Freim, Regenesis

Abstract: Zero valent iron (ZVI) as a powerful remediation amendment that can decontaminate soil and groundwater containing chlorinated hydrocarbons and other toxic substances. Successful in situ remediation is predicated on using amendments offering a perfect combination of reactivity, the ability to distribute uniformly, and persistence. The presentation addresses how:

  • Colloidal ZVI provides high surface areas with enhanced reaction kinetics.
  • Sulfidated ZVI greatly accelerates reaction kinetics while promoting reaction pathways with that can bypass the formation of toxic daughter products.
  • Sulfidated ZVI eliminates the reaction of iron and water allowing the material to persist for longer timeframes.
  • Colloidal ZVI particles are compatible with organic hydrogen donors and dechlorinating microbes. The ISCR-assisted bioremediation process promotes faster remediation.
  • Colloidal ZVI particles are compatible with colloidal carbon and this combination promotes accelerated remediation.
  • Colloidal ZVI promotes stable aqueous suspensions with small particles and can fit within and pass through interconnected pore volume of sandy soils and similar environments.

Presenter Bios:

Dr. John Freim, Regenesis

Dr. Freim is the Director of Material Science for REGENESIS. Dr. Freim is focused on developing and manufacturing advanced materials used for in situ environmental remediation and overseeing the manufacture of REGENESIS colloidal iron products; including AquaZVI, MicroZVI, and PlumeStop, along with new remediation products under development. Dr. Freim has 30 years of experience in the research, development, and manufacture of engineered materials with an emphasis on colloidal processing of nanopowders, ceramics, and metals. Dr. Freim has served as principal investigator for over 20 research and development programs funded by the U.S. government and private sector and is the author of 8 patents. Dr. Freim holds a Bachelor of Science in Chemical Engineering from the University of Illinois and a Doctorate in Materials Science from the University of California at San Diego.

Bill Lang, Lang Tool Co

Bill Lang formed Lang Tool Co. in 1991 to produce modified excavators and attachments for land clearing and tree removal work. In 1997 Lang Tool Co. was contracted to custom design and build soil mixing equipment for a firm that had been awarded a contract to stabilize dredge material coming out of the New York/New Jersey harbor. This equipment proved to be highly productive and reliable, which led Lang Tool Co. into the production of other soil mixing tools and reagent delivery equipment. Lang Tool Co. produced a rental fleet of soil mixing equipment that is used throughout the country by a number of remediation contractors. 10 years ago Lang Tool Co. produced the Dual Axis blender and began to move into contracting soil mixing work. LTC now contracts and subcontracts soil mixing work throughout the US and Canada. Bill holds several patents on soil mixing equipment.

Gary Meyer, Redox Solutions

Gary J. Meyer is currently the Chief Technology Officer at Redox Technology Group, LLC and responsible for the research and development of reagents for the treatment of heavy metals and other contaminants contained within gaseous, aqueous, and solid media. During the past 35+ years working in the environmental remediation industry, Mr. Meyer has witnessed the evolution of technologies available to meet the ever-changing regulatory requirements across a broad range of industrial sectors. Gary earned his B.S. in Environmental Science (University of Wisconsin-Green Bay), an M.S. degree in Soil Biochemistry (Purdue University), and an M.S. degree in Public Policy and Administration (Purdue University).

Chris Thomas, TRS

Christopher Thomas is a Senior Project Manager with TRS Group, Inc. (TRS). Chris has worked in the remediation field for 27 years, with 21 of those years in the development and implementation of in situ thermal remediation technologies (ISTR). Chris is a technical resource to TRS clients, while managing the Midwest region and mentoring TRS employee-owners.