Figure 21

The use of Sand and Bentonite Cartridges allow the CMT System to be installed in 3.25" (82.5 mm) (2.6" ID (66 mm)) diameter "Direct Push" casing. Bentonite and Sand Cartridges are 2.5" (64 mm) in diameter and are a nominal 12" (305 mm) length. The Cartridges slide onto the CMT and a Gear Clamp is torqued in place to stop each Cartridge from moving. One 3.5" (89 mm) diameter Separator Disk is below each Cartridge to help minimize the potential for vertical sediment movement. Spacers are used between each Cartridge and Separator Disk. Thus, the entire CMT Assembly is built right at the borehole, and then inserted hand-over-hand to the desired depth. Figure 22 shows all of the above described components required for Cartridge installation.

Figure 22