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Environmental Investigation & Remediation

Evaluating the GSI Pathway

June 16, 2022

When a contaminated site is located near a surface water body, there is a risk of contaminants in groundwater migrating into a lake or stream. If this is a potential route of conveyance, the Groundwater Surface Water Interface (GSI) pathway is taken into consideration during an exposure pathway evaluation. Since contaminant concentrations in groundwater do

When Should the Incremental Sampling Method be Used?

June 8, 2022

Common practice for soil sampling is to collect a discrete sample (soil from a known location and depth) from a few points and compare the analytical data to exposure criteria. In particular situations, discrete sampling is biased and not reproducible. For instance, if a soil sample is analyzed for arsenic and the aliquot of soil

Defining a NAPL Body

May 24, 2022

During an environmental investigation, contaminant exposure risk is evaluated through several pathways. These exposure pathways include: drinking water, direct contact, groundwater/surface water interface (GSI), and particulate or vapor inhalation. A conceptual site model (CSM), which is used to visualize the various exposure pathways that are applicable to a facility, is constructed through site characterization via

Redeveloping Vacant Gas Stations

May 2, 2022

Gas stations were once an important fixture of major intersections, thoroughfares, and rural communities across the United States. Over the past few decades, however, the number of stations has steadily been declining, in part because of decreasing gasoline profit margins and stricter environmental regulations. There was also a need historically for more gas stations as

Coal Fired Power Plants: Decommissioning, Remediation and Redevelopment

March 17, 2022

There has been a lot in the news lately regarding how we generate electricity to power our lives. It has become apparent that the energy sector is pivoting away from the reliance on coal for electricity while emphasizing other power sources such as natural gas and wind. Political perspective notwithstanding, many coal-fired power plants have

Emerging Contaminants

Emerging Contaminants – What You Should Know

February 22, 2022

Advances in testing and research have discovered chemicals in our environment that were previously thought to be absent. These chemicals are referred to as emerging contaminants (ECs). ECs encompass many different categories of synthetic and naturally occurring chemicals including pharmaceuticals and personal care products, persistent pollutants, pesticides, endocrine-disrupting chemicals, nanomaterials, and various other substances. These

The Challenge of Repurposing Contaminated Land

Environmental Construction Managment

February 10, 2022

Today’s construction industry faces a multitude of new and potentially challenging issues. One such challenge is the use and repurposing of contaminated land for building and development. When performing construction and demolition planning, and implementation activities on these properties, it is imperative that the potential for environmental hazards and chemical exposures associated with this work

The Underground Storage Tank Removal and Closure Process

September 9, 2021

Regulated underground storage tanks (USTs) are required to be decommissioned if they are out of service for more than one year. USTs that are discovered during site redevelopment should also be promptly removed to eliminate the owner’s liability for potential contamination. Envirologic has developed a full-service UST management program that is designed to help clients

what building owners need to know about lead

What Building Owners Need to Know about Lead

August 31, 2021

Lead is a naturally occurring, but toxic metal that has been used in paint, ceramics, caulk, pipe solder, and various other products. The U.S. government banned the consumer use of lead-based paint in residential structures in 1978. It’s important to note, any building constructed before 1978 is at risk of containing lead-based paint. With over

Data Quality Objectives

Collecting the Right Data for Informed Decision-Making

August 10, 2021

Environmental work inherently involves unknown conditions that require sampling and data collection to understand the nature of contamination and determine how best to address associated risks. Data Quality Objectives (DQOs) enable environmental professionals to clearly define data needs, the purpose of the data, and the decisions that will be made based on the data generated.

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