WORK PLANS - Laserfiche WebLink

Home Browse Search

SimulProbe®Technologies, Inc. Maxi SimulProbe®Soil/Groundwater Mode 3.21 Push and snap Yellow Diaphragm (hydrostatic heads of 50 feet or less) into cutting edge of Drive Shoe. Use the Ceramic Diaphragm for pressures greater than 50 feet of hydrostatic head. 3.22 Roll on latex Condom from shoe along length of probe. Be careful not to rest the weight of the probe on the Swage-lok connector during this procedure. Place the second Gooch tube over the Condom; along the bottom of the drive shoe. This serves as a bumper to protect the Condom as the tool is lowered into the bore hole. 3.23 Attach Maxi SimulProbe@ to one-foot AW rod. Be careful not to rest weight of probe on Condom covered shoe while attaching the AW rod and to the drive hammer. 3.24 Attach Soil Gas Line to the Swage-lok connector at top of the Sampler Head. 3.25 Connect the AW adapter pin and rod to the top of the Sampler Head. The Driller then raises the Maxi tool with the winch line and lowers it a few feet into the casing. 3.26 Attach the up-hole end of the spool to the inert gas tank regulator. The three-way valve handle on the side of the Hose Spool should be pointed towards regulator line. 3.27 With the probe suspended a few feet down inside the casing, pressurize the water canister. The rule of thumb for pressurizing is to assume 60 PSI/100 feet of hydrostatic head (pure water is approximately 43 PSI/100 feet; the additional pressure assumes suspended and dissolved solids and thus increased specific gravity). See attached tables from Groundwater and Wells, Driscoll, 1987, pages 938 and 939. Note: for safety, the SimulProbe® should always be pressurized and de- pressurized inside the casing. 3.28 Observe line pressure gauge on regulator. When line pressure is equal to 60 PSI/100 feet of hydrostatic head (0.6 PSI/ft), close 3-way valve on hose spool to trap pressure. Closed position is when the valve handle is at 90 degrees to 3-way valve's body. The 3-way valve is attached to the side of the hose reel and is the up-hole terminus for the Teflon line. The line is attached to the center port on the "T" shaped valve. One of the two side ports is connected to the Nitrogen gas supply and the second is attached to a short (2.5') length of Teflon line. This short length is used for the inverted soda bottle method described in section 5.22. If the valve is positioned halfway between these two ports, which is 90 degrees to the 3-way valve's body, all three ports are closed to each other. Pointing the 5