Environmental Health and Safety Blog | EHSWire

by Bruce Groves

Through my membership with the New Jersey American Industrial Hygiene Association (NJ-AIHA), I had the opportunity to make a presentation at the New Jersey Clean Air Council’s (NJCAC) annual meeting on April 13 ^th.   This particular meeting sounded intriguing as it would be focusing on a topic of great interest to me – a technical dialogue on how to measure and identify the effect of air pollution (and other environmental stressors) on the cumulative health issues of the public. The meeting aimed to bring professionals from varying disciplines to discuss technical approaches, academic research and general opinions on how to reduce this pollution and therefore improve the health of the affected populations.  

The meeting lasted a full day with contributing presentations from a dozen or so professionals. There were 15 NJCAC Board members at the meeting and 50+ attendees comprised of 11 presenters, NJDEP staff, and members of the public.  As a presenter, we were each given about 20 minutes to make our points regarding specific urban populations that have inordinately higher exposure to air contaminants as compared to people living and working in “cleaner” urban, suburban and rural areas of the state.  The majority of the presentations concluded that there are neighborhoods where pollution levels are chronically and significantly high.  Presented evidence also linked higher incidences of illnesses and disease with these cumulative exposures to contaminants and other environmental (and social) stressors.  

Bob Martin, the NJDEP Commissioner, gave an introductory presentation outlining current and future regulatory initiatives for reducing air pollution in New Jersey. One plan is to ban older diesel equipment in areas that do not have effective emission controls.  Joe Suchecki, a representative of the Engine Manufacturers Association, correspondingly, presented convincing evidence that new diesel technology does not create air pollution problems.  The trick now is to get all the older diesel equipment off all the roads and construction sites replaced by either new equipment or equipment retrofitted to control air emissions.

Ana Baptista, PhD, gave an excellent presentation on the high levels of pollution in the Newark Ironbound district and the resulting links to disease in the residential population resulting from cumulative exposure to these contaminants.  Dr. Robert Laumbach gave a similar presentation about future research that he is leading to test people who live in the Ironbound in an attempt to prove this link of air pollution exposure to increased illness and disease.

My own presentation discussed Emilcott’s experience measuring local air pollution (particulates and vapors) and other environmental parameters (noise, wind speed and direction) using the Greenlight Environmental Monitoring System which collects, in real-time, data for particulates (at multiple particle size ranges) and vapors, coupled with data of wind speed and direction, to identify emission sources and measure their impact on local air pollution.  We have found that “what is measured, improves”, and by using this sophisticated and integrated air monitoring approach, identified emission sources can be controlled to make immediate and sustainable improvements to the local air quality. 

Overall, excellent information was presented, reinforcing the fact that the air quality in much of New Jersey is not very good and, in certain areas (usually in disadvantaged urban neighborhoods), it is extremely poor.    And, residents living in zones with the worst air pollution also show some link to increased disease and illness.     

I left the NJCAC annual meeting knowing that solid academic work was underway to prove that high levels of air pollution causes disease.  What was missing was evidence that effective, short-term actions are being taken, to reduce the levels of pollution and contaminant exposure in these areas to improve overall health for the resident population.

by Ed Pearl

I have been doing on-site environmental health and safety (EHS) work at many types of outdoor job sites for six years.  A big part of the site safety manager at a construction project is air monitoring. When workers have the possibility of exposure to an airborne hazard, it's critical to take frequent measurements of site conditions (often airborne particulates or hydrocarbons) to define worker risk for exposure. When the risk increases, the safety plan kicks in to prevent overexposure. Knowing what is floating in the air at the job site (and how much of it) is why air monitoring is such an important part of any construction site safety program.

For the last several months I have been working at a former Manufactured Gas Plant (MGP) responsible for, yet again, another air monitoring program.  The difference is, for the first time, I’m using the Greenlight Environmental Monitoring System for air monitoring – a completely new experience.   

How I Used to do Air Monitoring

Maybe this daily process looks familiar to you? Snow, rain, ice, cold…the daily routine didn’t vary much!

• I collected the air monitoring instruments at the end of the day and downloaded each one individually to get the day’s readings.

• I checked through the day’s data to see if there were any problems (maybe a little late?).

A real leap in monitoring technology meant that I was using a laptop for data collection!  I drove or walked to each field station to download data onto the computer. Sunny days, while pleasant, had their own challenges – have you ever tried to look at a laptop screen while combating the glare of full sun? Needless to say, when it came to technology I was open…but skeptical.

My New Perspective

The differences between the fairly standard monitoring equipment setup (even with the laptop addition) and how the Greenlight System works is like night and day. As I worked, my initial impressions were shaped by Greenlight’s ease of setup and operation as the entire system design has been set up from an EHS professional’s perspective:

• All monitoring devices in the field are turned on and off from a central location.


• No tedious end-of-the-day drive and download because the System continuously feeds and records monitoring data to a server in “real time”.  

From the minute the project starts up each day, the monitoring results are displayed in REAL TIME on my operator screen.  I can see ALL of the readings from the entire site’s monitoring stations at the same time, no matter where they are in the field!  In fact, now I see site conditions as they happen so that I can take action as needed. And, if a field station or monitoring device is non-responsive, I am notified almost immediately rather than discovering that there’s no valid data to download at the end of the day.

The Greenlight System that I’m using includes what I consider to be ever-important – a weather station:  temperature, humidity, wind speed, and wind direction. Having this information corresponding to particulate or hydrocarbon monitoring -- in real time -- is critical when trying to define potential exposures to hazardous materials and implement appropriate controls. Since weather conditions directly affect air monitoring and have a potential to change quickly (and sometimes without much warning), the data pouring in from the weather station is very useful to have at my fingertips.

The Learning Curve Levels Out

Since I am a new operator of the Greenlight System, it has been a learning process for me. Starting out was a little bit scary! After six years of doing it pretty much one way, it’s a new way of both thinking and reacting. But, the ease of operation and the effectiveness of the System have transformed me…allowing me to provide more effective support to the site construction team. 

• Need the entire site air monitoring and weather condition information? With the data on my computer screen and on the server, if anyone needs a snapshot of site conditions at any moment, I can supply that information.


• Want to know what happened last week? I’ve got it the information all ready to go! It no longer takes hours or days to find the right data and put it into a format that is understandable and explainable.


• Concerned that there is a change in airborne contaminant levels at the site?  I’m on top of that, too! Even when a small change occurs, I am notified immediately, and I can quickly investigate. 

The Data Speaks

My sense is that when the construction team experiences how available the air monitoring data is and that with these data we can be very responsive with control implementation, they are more confident that are working in a safe environment.  The workers seem more content, and project managers are pretty happy knowing that they can continue working safely while staying on time and on budget.

What new innovations do you see in particulate and hydrocarbon monitoring at construction sites? Have you found any other tools that will help you be a more effective site safety manager? What other “tools” would you like that would help you monitor airborne contaminants?

Bruce Groves

Why do we care about particles floating around in our air? Small, inhalable particles are themselves pollutants that have shown to cause illness and chronic diseases such as asthma and certain types of lung cancer . Particles are also excellent indicators (or surrogates) for measuring other pollutants such as vapors and gases. By measuring the aerodynamic size of particles in our air, it is possible to identify and sometimes “fingerprint” them so that we can reduce or stop local sources of pollution immediately. The goal AND end result are to develop as clean a living and working area as possible.

What are we doing today?

Today, air monitoring is a piecemeal approach that is government-mandated but generally project related. When the project is over, the problem is essentially considered to be gone. Of course, in areas of high population density or industrial activity, continuous, real-time air monitoring of general conditions does not exist. Other than pollen counts, very little information about these pockets of high pollution and high particulates is available to the public or government agencies. And, the data that is available is generally much later and does not present an accurate picture of today’s problem.

What is the future in environmental air monitoring?

As technology has improved, so have particle detectors and the ease of data transmission and analysis. By 2013, small particle size detectors, such as those found in the Greenlight Environmental Monitoring System, will be consistently deployed in high population areas in such cities such as NYC, Tokyo, London and Los Angeles. These particle size detectors will be coupled with wind-speed and direction detectors and web cameras to pinpoint the exact sources of particle emissions (e.g., construction or industrial equipment, idling vehicles or high traffic transportation corridors) that are creating a measurable increase in local air pollution.

This web of detector stations will form an active or “live” map of a city that continuously measures and reports the concentration of various particle sizes. The “map” will be automatically programmed to provide warning levels and alarms to reveal when and where total particle concentrations exceed warning and safe threshold levels. By locating (in real time) the place, the direction of the pollution source and supporting video evidence, private companies and government agencies can take measures to stop or reduce the indicated pollution sources. Constant real-time monitoring, assessment and action will provide continuous improvement in local air quality that will reduce the onset of disease associated with inhaling dirty air. Warning systems set up through websites will enable agencies and individuals to check on their local air pollution conditions using their computer or smart phone.

What is the first step?

At Emilcott, we have been working with particulate monitoring on job sites for over 25 years. As an extension of our field experience, we’re working on a solution that meets the needs of our clients (private companies and government agencies) -- the Greenlight Environmental Monitoring System. With multiple project implementations under its belt, the Greenlight System’s particle size measurement, assessment and reporting capabilities are demonstrating how real-time monitoring is helping projects get cleaner each day – reducing the liabilities of our clients while giving them the information to keep the public and workers safe.

As the Greenlight System’s next phase of engineering development is outlined, our goal is to have a universal system that will provide comprehensive sampling in potentially high pollution areas so that neighborhood air quality can be improved and the incidence of lung disease is reduced. It will be a future watchdog for providing cleaner air locally where no such means of protecting local air quality exists today.

What do you think the future of environmental air monitoring holds? What are the benefits or challenges that you associate with monitoring and mapping pollutants in a broad geographic area?