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Job No. 00760 Page: 4 <br /> M <br /> two groundwater monitoring wells (MW-2 and MW-4) were used <br /> as extraction wells. During the final test involving MW-2 , <br /> a mechanical failure of the vacuum pump occurred preventing <br /> the measurement of extraction volumes from MW-2 . <br /> Monitoring wells MW-1 and MW-3 were used only to measure <br /> the capture radius of various extraction wells. <br /> Table I indicates that extraction volumes ranged from 1.4 <br /> cfm to 20 cfm with vacuums recorded at 3 .5" Hg to 2 . 5" Hg. <br /> Influence was noted at distances greater than 55' but less <br /> than 691 . Extraction from shallow well VW-9 showed greater <br /> influence on the deeper wells than on shallow wells at the <br /> same radius. <br /> The site is amenable to vacuum extraction. Each extraction <br /> well lies within the capture zone of another well. Wells <br /> MW-2 and MW-4 should demonstrate an overlapping capture <br /> zone at the deeper interval . The vapor recovery wells will <br /> have overlapping capture zones in the shallower interval . <br /> Isolated depths were not tested, but the study indicates <br /> that the capture radius is spherical. <br /> Initial extraction rates should yield approximately 250 <br /> pounds of hydrocarbons per day at 60 cfm and initial soil <br />