Mehrdad Javaherian - Experienced in Contamination Assessment

Dr. Mehrdad Javaherian is an experienced environmental engineer with a doctoral degree in environmental epidemiology. As Principal of LRM Consulting, Inc., his consulting services focus on public health issues related to air, water and soil contamination, engaging diverse commercial clients in assessing chemical contamination toxicity and associated strategies for remediation. Mehrdad Javaherian has performed more than 150 in situ evaluations of toxicological health risks and served as a consulting epidemiologist/health assessor with the California Department of Public Health (www.ehib.org/person.jsp?person_key=7837).

Dr. Javaherian is also a Consulting Principal with Endpoint Consulting, Inc., serving federal clients across the Department of Defense.  Dr. Javaherian has participated in the development of a number of patented sustainable remediation technologies, including his patented mobile thermal desorption technology for in-situ and ex-situ soil remediation, and advanced filters that decrease CO2 emissions. Mehrdad Javaherian’s recent projects include serving as a health risk assessor and epidemiologist for a Modesto, California, citywide PCE exposure public health assessment. He led California Department of Public health's efforts in screening and/or quantitatively evaluating vapor intrusion at more than 100 facilities throughout the city and led a number of outreach programs and community workshops.

Pacific Gas and Electric Programmatic Sustainable Remediation Guidance

With expertise in environmental remediation, Dr. Mehrdad Javaherian leads LRM Consulting, Inc., and serves as Principal Consultant with Endpoint Consulting in California. Dr. Mehrdad Javaherian also has consulted for leading organizations, such as the Pacific Gas and Electric Company (PG&E). He is the coauthor of PG&E's Programmatic Sustainable Remediation Guidance.

In the guidance, PG&E explains that sustainable remediation is central to its corporate culture, as the process can foster environmental, economic, and social benefits. The guidance was created to deliver continual direction on sustainable practices throughout the remediation project life cycle, starting from project planning and carrying through to post-remediation evaluation. According to the PG&E guidance, sustainable practices focus on decreasing economic and social impacts, limiting atmospheric emissions, and creating minimal environmental disruption.

Using the guidance, PG&E can both identify sustainability stressors and the corresponding sustainability best management practices (BMPs). The guidance also provides a framework for assessing the impacts of BMPs and assigning an activity-specific sustainability rating. Along with providing information on sustainability benefits, the guidance is a living document that can be modified based on evolving remediation practices.

What Is the LEED Rating System?

Environmental epidemiologist and engineering professional Dr. Mehrdad Javaherian holds 23 years of experience as a consultant and project manager on environmental remediation projects for various entities, including the United States Air Force. In addition to having obtained degrees in civil and environmental engineering, public health, and a doctorate in epidemiology, Dr. Mehrdad Javaherian is a LEED-certified Green Associate.

The LEED (Leadership in Energy & Environmental Design) rating system is a measurement by which buildings are evaluated to determine levels of environmental sustainability. Various types of construction projects, such as new building construction or neighborhood development, earn LEED certifications on different scales. Regardless of the construction type, certain standards must be met in order for a project to be LEED-certified. These include the selection of a sustainable site, a water-efficient design, and the use of sustainable resources.

Once all prerequisite standards are met for LEED certification, a building can also earn an additional sustainability rating, based on elective credits received for the implementation of unrequired green technology. These certification levels range from silver to platinum, and showcase the commitment of architects, engineers, and project managers to environmental health.

Frequently Asked Questions About Vapor Intrusion

Environmental epidemiologist Dr. Mehrdad Javaherian earned holds degrees in civil and environmental engineering, public health, and a PhD in Epidemiology. Currently serving as Principal Consultant at Endpoint Consulting, Inc., in CA, Dr. Mehrdad Javaherian possesses ample experience in public health, and and has conducted extensive research on the effects of vapor intrusion on indoor air quality. Vapor intrusion is an environmental issue that can affect the health of urbanized populations around the world. Some of the most commonly-asked questions about the subject are addressed below.

Q: How does vapor intrusion occur?

A: Vapor intrusion is caused by chemical or petroleum product leaks within the ground below buildings. When a chemical or product leaks into the ground, it can materialize as gas or vapor and infiltrate buildings where humans live and work, causing health risks.


Q: What kind of products can cause vapor intrusion?

A: Apart from buried industrial waste, common chemicals such as de-greasers, dry cleaning products, diesel fuel, and gasoline can all produce vapor intrusion.


Q: Which health concerns are associated with vapor intrusion?

A: In the short term, vapor intrusion is associated with nausea, headaches, difficulty breathing, and irritation of the eyes. Long term consequences can include increased susceptibility to certain cancers and other enduring illnesses. Additionally, some vapor intrusion may pose a risk of inciting an explosion.

The Impact of CO2 Emissions and Suggestions to Alleviate the Issue

As Principal Consultant to Endpoint Consulting, Inc., Dr. Mehrdad Javaherian leverages his background in engineering and environmental epidemiology to improve the field of environmental health. Dr. Mehrdad Javaherian holds multiple patents for a green and sustainable Vapor Energy Generator technology which incorporates the use of a carbon dioxide (CO2) emission-reducing filter.

CO2 accounted for 82 percent of the United States’ greenhouse gas emissions in 2013. Released by burning fossil fuels, CO2 has become increasingly dangerous to the environment. In fact, in May 2013, scientists observed CO2 concentration of more than 400 parts per million, the highest in Earth’s history. This quantity negatively impacts climate change and can lead to amplified global warming. Richard Zeebe, professor of oceanography in the School of Ocean and Earth Science and Technology at the University of Hawaii at Manoa, suggests that it can result in large ice sheets melting, thus raising sea levels.

Because the gas is produced though human activities, such as driving cars and using electricity, the Environmental Protection Agency recommends converting energy use from fossil fuels to renewable sources. Reduction of petroleum consumption and enforcement of carbon capture and sequestration for coal- and gas-fired plants is also advised.

What Is Environmental Epidemiology?

Dr. Mehrdad Javaherian is an environmental epidemiologist based in California. In addition, Mehrdad Javaherian has consulted on public health assessments for the Agency for Toxic Substances and Disease Registry and the California Department of Public Health.

Environmental epidemiology is a branch of public health that assesses the possible hazards in the environment and its possible effects on human health. The environment, in this context, can be either natural or man-made. And environments can be physical, biological, chemical, social, and economic.

In simpler terms, many types of exposure have an effect on human health. The factors making up a person’s environment may improve or harm his health. The study of environmental epidemiology aims to look into these effects and do the necessary control or prevention work that is needed to ensure safety. Some general examples of studies on environmental epidemiology include the effects of air pollution, tobacco smoke, and radiation on the human population.

An Overview of Soil Vapor Extraction

Over the course of his career in environmental health, Dr. Mehrdad Javaherian has managed a number of large environmental remediation projects throughout the United States. A technical contributor to Environmental Public Health Today, Dr. Mehrdad Javaherian serves as a remediation consultant to the Pacific Gas & Electric Company and the U.S. Army, Navy, and Air Force.

One of the most commonly used physical treatments for contaminated soil, soil vapor extraction (SVE) uses vacuum pressure to extract volatile compounds from soil. Using vacuum blowers and extraction wells to reduce pressure on a soil sample, the SVE method collects gases that emerge from the soil.

Benefits of SVE include minimal disruption of the environment and limited risk of human exposure to harmful compounds. However, the effectiveness of SVE also is limited in certain areas. Because it relies on the ability of organic contaminants to evaporate at temperatures lower than the vaporization point of water, SVE cannot remove metals, heavy oils, or PCBs. Soils with high moisture content generally require more powerful vacuums, which can raise groundwater levels and cause more contaminants to dissolve into the water.

Brief Comparison of In Situ and Ex Situ Bioremediation

A longtime engineer and environmental epidemiologist with over two decades of experience, Dr. Mehrdad Javaherian holds a PhD in environmental epidemiology, together with advanced degrees in public health and civil and environmental engineering. Throughout his career, Dr. Mehrdad Javaherian has conducted extensive work in the field of in situ bioremediation (ISB), which features a number of advantages over ex situ bioremediation (ESB).

ISB involves the application of remediation techniques at the subsurface level, while ESB utilizes aboveground remediation strategies, such as bioreactors or treatment cells. Advantages of ISB include the possibility to completely transform harmful organic compounds to innocuous components such as water and carbon dioxide. ISB typically produces little secondary waste and minimizes risk of human exposure to contaminated media. From a financial standpoint, ISB is often faster and less expensive than ESB.

Although ISB enjoys many advantages over ESB, the nature of the remediation site may present some difficult obstacles. Depending on the contaminants, ISB can produce harmful intermediates or even fail to degrade intractable materials.