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Environmental Issues

Dr. Lorne Everett Keynote Speaker at the Annual Meeting of the Association of California Water Agencies

By LEA Environmental, Inc. on Nov 08, 2017 at 11:16 PM in Environmental Issues

Dr. Lorne Everett was invited by the Association of California Water Agencies (ACWA) to be the Keynote speaker for the ACWA Region 5 Annual Meeting at the Glen Annie Golf Club in Goleta, California on September 17, 2017. The title of Lorne's presentation was "Recycled Water and Water Reuse." Lorne stressed the need to understand the flow and sampling of waste applications to land in the solid and liquid form. He also noted the risks faced by water agencies from emerging contaminants such as pharmaceuticals, 1,2,3-trichloropropane (1,2,3-TCP), chlorinated volatile organic compounds, and glyphosate - the main ingredient in the widely used herbicide, Roundup.


California Sets Drinking Water Standard for 1,2,3-TCP

By LEA Environmental, Inc. on Jul 24, 2017 at 11:36 PM in Environmental Issues

California has established a stringent limit on the agricultural chemical, 1,2,3-TCP in drinking water. TCP has already been detected at the newly enforceable level of 5 parts per trillion in over 100 water systems serving nearly a million people across the state.


A Call to Action from Scientists and Health Professionals to Reduce Exposure to Toxic Chemicals

By LEA Environmental, Inc. on Jul 08, 2016 at 09:59 PM in Environmental Issues

Citing a rise in incidence of neurodevelopmental disorders, scientists and medical professionals call on the nation to do better protecting children from toxic chemicals.


New Research Reveals Shortcomings in Vapor Intrusion Investigations

By LEA Environmental, Inc. on Apr 21, 2014 at 03:57 PM in Environmental Issues

There is a growing body of research pointing to very significant temporal and spatial variability in vapor intrusion, which is a contaminant transport mechanism that can lead to the occurrence of toxic chemicals in indoor air. Current sampling protocols, as recommended by many environmental regulatory agencies will not adequately characterize such dynamic behavior, possibly leading to flawed decision-making regarding the risks posed by vapor intrusion.


Metals in the Environment: Innovative Approach for Determining Whether Metals in Soil and Sediments are Naturally Occurring or Man-Made

Metals in the Environment: Innovative Approach for Determining Whether Metals in Soil and Sediments are Naturally Occurring or Man-Made
By LEA Environmental, Inc. on Mar 28, 2014 at 06:28 PM in LEA Announcements, Environmental Issues

LEA�s Bill Schaal, PG, recently made a presentation related to metal element contamination to regulatory staff at the California Department of Substances Control (DTSC) in Chatsworth, California. Bill was joined Jeff Hess, PG, Technical Director of Gilbane Company. Bill and Jeff, together with colleague, Mark Sorensen, PG, are advancing the state-of-the-art within the environmental industry by applying geochemical methods to determining whether metal elements are naturally occurring or anthropogenic (man-made). The present state-of-practice within the environmental industry relies heavily on professional judgment, limited statistical analysis, and analytical methods that were developed to evaluate bioavailable compounds thus were not intended for this purpose.


Endocrine Disruptors: Emerging Chemicals of Concern

By LEA Environmental, Inc. on Oct 22, 2013 at 03:31 PM in Environmental Issues

Endocrine disruptors are a class of synthetic chemicals that may mimic the action of hormones in animals and humans. Recent statements by scientists and policy makers highlight the controversy over how these chemicals should be regulated.


Environmental Consequences of Hydraulic Fracturing or “Fracking”

By LEA Environmental, Inc. on Jun 26, 2013 at 09:42 AM in Environmental Issues

A recent study in western Pennsylvania found a high incidence of methane in private drinking water wells at homes near natural gas drilling operations. Homes closest to natural gas wells had (on average) methane concentrations six times higher than homes farther away.


New EPA Guidance on Vapor Intrusion

By LEA Environmental, Inc. on Jun 19, 2013 at 03:03 PM in Environmental Issues

The US Environmental Protection Agency has issued two draft guidance documents concerning vapor intrusion. Vapor intrusion is the migration of volatile chemicals from contaminated soil or groundwater into overlying buildings. One important concept that is emphasized by EPA is spatial and temporal variability of indoor air concentrations. LEA has been a vocal advocate for appreciating and accounting for this variability when addressing vapor intrusion problems.


Nitrates In Groundwater: A Persistent Nationwide Problem

Nitrates In Groundwater: A Persistent Nationwide Problem
By LEA Environmental, Inc. on May 20, 2013 at 08:46 AM in Environmental Issues

One of the great accomplishments of the environmental movement in the US has been to secure clean drinking water for the vast majority of Americans and to protect the waterways and aquifers that serve as sources of clean drinking water. In fact, The Clean Water Act of 1972 and The Safe Drinking Water Act (SDWA) of 1974 are considered two of a handful of federal laws that ushered in the modern era of environmental protection. Considering all the progress that has been made, it is easy to forget that the work of the SDWA is not done. It is not just third-world problem: many folks right here in the U.S. still lack access to safe drinking water.


New Report on Environmental Decision Making under Uncertainty

By LEA Environmental, Inc. on Apr 19, 2013 at 06:02 PM in Environmental Issues

L. Everett & Associates recognizes the importance of understanding and assessing uncertainty associated with the various sources of information and data that has to be considered in each case or project.


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