At a service station in Maryland, MPE was conducted using a VE/GE system that consisted of 10 VE wells and 6 GE wells. The sites were located on a coastal plain, and the soil consisted of sandy silts and clays. The average flow rates were standard 16.7 m3/h (9.8 scfm) in the VE wells and 0.82L/min (0.24 gpm) for the GE wells. The concentration of MTBE in groundwater was reduced from 27,027 to 32^g/L over 3.5 years of system operation. The cleanup was reported as completed; however, a cleanup goal was not provided.50
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