Arcadis articles

Successful Biostimulation Treatment of TCE DNAPL

The challenges posed by the presence of DNAPL are rooted in the unpredictable manner in which it spreads and moves through the subsurface, and the fraction of total contaminant mass it represents in an associated groundwater plume via sorbed, residual and drainable phases (typically greater than 99 percent). Under natural conditions, the dissolution of DNAPL is very slow, allowing groundwater plumes to persist for many decades if the dissolution rate cannot be enhanced. As a result of these chal

Jan. 22, 2007

John Horst

What is a Plume? and Why do I Care?

From The National Groundwater Association

Most of you might question why I want to spend time discussing a subject that is outside of the more traditional subjects that would be reviewed in this column. After all, plumes are usually co

Jan. 1, 2006

Evan K. Nyer; Peter L. Palmer

Risk 101 & Remediation Design

Risk Assessment is the basis for almost all of our designs. Perceived risk is the basis for the rest of the designs. A good remediation design must incorporate the concentration goals for that site and the designer must know how those goals were set. In order to know how those goals were set, we all must have a basic understanding of Risk Assessment. Not just the numbers, but the methodology that developed those numbers.

Can you answer the following questions?

How can 50 ppb

Jan. 1, 2006

Evan Nyer; Ruddie Clarkson

ARCADIS Technology Applications in the Mining Industry

ARCADIS is a leading global, knowledge-driven service provider, active in the fields of infrastructure, buildings, environment and communications. Known for our innovative and full services capabilities, we develop and implement solutions based on personal service, open communication, and a commitment to quality.

We are committed to developing and utilizing leading-edge technologies, continually looking for ways to clean up impacted sites faster and at lower total cost than ever before. Our

Jan. 1, 2006

Perchlorate Remediation Project Case Study

ARCADIS was contracted in 2000 to lead the development, evaluation and selection of a final groundwater remedy for this 94-acre site in California. As part of this work, ARCADIS is also participating in the evaluation of innovative technologies with the potential to treat soil impacts in the multiple source areas across the site. Specifically, the project is focused on the remediation of seven source areas and their associated groundwater plumes, some of which are commingled and are comprised of

Jan. 1, 2005

Hydrogeologic Investigation of VOC Contamination in Bedrock Using Mass Flux Analysis – A Case History

Courtesy of US EPA and NGWA proceedings of the 2004 U.S. EPA/NGWA Fractured Rock Conference: State of the Science and Measuring Success in Remediation, September 13-15, 2004, Portland, Maine

Abstract
A fractured bedrock system was investigated using a combination of hydrogeologic methods to minimize the number and depth of bedrock wells installed during the investigation. These methods were used to determine the vertical and horizontal extent of volatile organic

Sep. 13, 2004

Richard K. Eby; Robert E. Zimmermann; Michael T. Paczkowski; Terence Regan

A Practical Guide to NSR Reform

As discussed in detail in the March 2003 Issue of EM, the U.S. Environmental Protection Agency (EPA) promulgated a series of reforms to its New Source Review (NSR) permitting program starting on December 31, 2002. These reforms are commonly referred to as “NSR reform.” EPA asserts that the reforms reduce administrative burden, maximize operating flexibility, improve environmental quality, provide additional certainty, and promote administr

Sep. 1, 2004

j harrington; John Hanisch

In-Situ Anaerobic Remediation of Perchlorate-Impacted Soils

Abstract
ARCADIS is currently leading the development, evaluation, and selection of a final groundwater remedy for a 94-acre manufacturing facility in the western U.S. This facility has produced small explosives and vehicular safety products since 1957. As a result of historic operations, soil and groundwater at the site have been impacted by perchlorate. To date, remediation efforts have been focused on seven source areas and their associated groundwater plumes, some of whic

Jan. 1, 2004

Avram J. Frankel; Lisa M. Owsianiak; Benjamin J. Wuerl; John F. Horst

Optical Remote Sensing in the United States

Recent studies that involve the use of optical remote sensing (ORS) techniques to measure gaseous and particulate pollutants have rekindled interest among environmental researchers and regulators in this decades-old technology. This article describes some of the key research and development projects that are helping restore ORS-based methods to the list of currently available emissions characterization technologies.

INTRODUCTION
Research and development activities of the

Nov. 1, 2003

Ram A. Hashmonay

Variables Affecting Emissions of PCDD/Fs from Uncontrolled Combustion of Household Waste in Barrels

ABSTRACT

The uncontrolled burning of household waste in barrels has recently been implicated as a major source of airborne emissions of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). A detailed systematic study to understand the variables affecti

May. 1, 2003

Paul M. Lemieux; Brian K. Gullett; Christopher C. Lutes; Christopher K. Winterrowd; Dwain L. Winters