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Compression stations also known as pumping stations, are facilities that help to transport natural gas. They pose some health effects.  A study published in a 2014 Reviews of Environmental Health found that spikes in air toxins around the Minisink, New York compressor coincided with residents’ adverse health symptoms. Toxins included [[volatile organic compounds]] (VOCs) as ethyl [[benzene]], n-butane, n-hexane, as well as formaldehyde, and particulate matter. Thirty five subjects were surveyed. A physician also conducted interviews. They also provided five monitors to measure fine [[particulate matter ]] in air near residences for the two months. Participants additionally used special canisters to capture air samples when the compressor emitted strong odors.<ref> David Brown, Weinberger B, Lewis C, Bonaparte H., [http://www.ncbi.nlm.nih.gov/pubmed/24690938 "Understanding exposure from natural gas drilling puts current air standards to the test,"] March 2014.</ref>