Active production wells were buffered at 1500, 2000, and 2640 (1/2 mile) feet.
the analysis was limited to oil and gas wells identified as active; meaning they are producing or are viable to produce oil and/or natural gas.  This limitation on the dataset was justified to remain conservative to the most viable modes of exposure to contaminants from well sites.  Under the assumption that “plugged”, “buried”, or “idle” wells that are not producing (or at least reporting production figures to DOGGR) do not purvey a risk of air emissions, the main route of transport for pollutants to the surrounding communities via air emissions from “producing” oil and gas wells.  Wells qualified if they reported production 2014 – October, 2015.
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