Abstract:Several different small-diameter (1/2-inch and 3/4-inch) bladder pumps (from different manufacturers) were tested in 1/2-inch and 3/4-inch direct-push (DP) monitoring wells at the CRREL site in Hanover, New Hampshire. Obtaining a sample at this site has been challenging because the depth to ground water is over 100 feet and thus substantial lift is required to bring the water to the surface. Although the different brands of pumps fit into the small-diameter wells, all of them hung up in some of the wells when … Show more
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