Greenversations

March 2009 marked a memorable month in the 19 years I have worked for EPA’s Office of Water. That is when Environmental Monitoring and Assessment published two articles about EPA’s National Lake Fish Tissue Study. I had the privilege of managing this study for the 8 years required to complete it.

This study was a unique achievement. It was the first statistically-based national assessment of freshwater fish contamination to be conducted in the United States. It also included the largest set of chemicals (268) ever studied in fish. Field crews worked 4 years to collect fish samples from 500 lakes selected randomly from a statistically-defined set of about 147,000 lakes in the lower 48 states. Tony Olsen in EPA’s Office of Research and Development designed the study and directed statistical analysis of the concentration data. The design of this study generated results that allowed EPA to estimate the percentage of lakes and reservoirs across the country with fish tissue concentrations of specific chemicals, such as mercury, above levels of concern for human health.

Aside from my intense feeling of pride in providing leadership for this major scientific study, I look back in amazement at the number of people who volunteered years of effort to make this study possible. EPA relied on the participation of scientists from 58 state, tribal, and federal agencies for 5 years to evaluate sampling sites and collect fish samples. Their long-term commitment to maintaining the highest standards of quality while participating in the study produced scientific results that earned the praise of senior EPA managers, industry representatives, and members of academia. I want to extend my heartfelt appreciation to all of the scientists across the country that support EPA. In the end, it was their hard work and dedication that made this study a success.

Leanne Stahl is an environmental scientist in the Standards and Health Protection Division of the Office of Water, where she conducts research on chemical contamination in fish and surface waters.

About the author: Jeffery Robichaud is a second generation scientist with EPA, and serves as Chief of the Environmental Assessment and Monitoring Branch in Kansas City.

One of my first recollections of Kansas City was sitting at a stoplight while fierce gusts of wind attacked my car and shook traffic signal poles so viciously that I thought they would snap like popsicle sticks. Actually, it wasn’t just the wind but also the ragweed that was assaulting my car and senses. I am violently allergic to ragweed and the stuff grows…well like weeds out here.

My allergies notwithstanding, we have pretty good air quality throughout the Midwest although we do face challenges with ozone and particulate matter in urban areas like Kansas City and St. Louis. Throughout the country, states, tribes, and local governments maintain monitors that sample for pollutants. Since these monitors play an important role in revealing air quality, they must be operated and maintained properly. We assist by auditing stations to ensure that equipment is operating properly. This work requires a platform that can house delicate instruments yet is rugged enough drive to remote locations. After several possibilities we settled on a Winnebago, but there is nothing recreational about this vehicle.

We designed it to operate as a mobile air monitoring laboratory. We’ve used this platform successfully for a number of years and it serves as a great conversation piece when we talk with children about air quality. On-site audits require several hours to complete and we use a gasoline generator to power the instruments. Sometime last year the guys got the idea of supplementing the lab with the abundant source of clean energy that was howling in their ears… wind.

Several weeks ago we installed a turbine to harness the clean energy provided by the wind. The turbine generates electricity to recharge batteries stored inside the lab that when fully charged can run the entire lab for up to eight hours without a single wisp of generator exhaust. Thanks to this innovation we will conserve gasoline on each trip (as long as the wind cooperates). As my old high school football coach Sherman Smith used to say… if it’s to be it’s up to me. We know that it is up to all of us to find ways to help reduce our carbon footprint both at home and where we work, even if work is sometimes on a dusty road in western Nebraska. Now if we could just find something to use all that ragweed for…