ented to the American Chemical Society in San Francisco in April 1997, noted that MTBE "can move from shallow to deeper aquifers with time." MTBE enters the environment, and eventually the groundwater, mainly from leaking underground fuel tanks and associated piping, but also from incomplete combustion in internal combustion engines, spilling and evaporation during transportation and refueling, and watercraft exhaust. Atmospheric precipitation may be another potential source of MTBE in groundwater, because MTBE percolates easily throu
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