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GEOPROBE OPERATION CATEGORY: GEO 4.12 - March 1998 5.2.2 Setup of the Geoprobe Following the visual inspection and routine maintenance of the Geoprobe, the unit is ready for operation. The following steps describe the setup procedures for the Geoprobe 8-A: • Position the vehicle at the sampling location. Park the van as level as possible; the van must be level in the side-to-side aspect to drive the rods properly. If on an incline, point the front of the van upgradient. If possible, face the van downwind to avoid potential cross-contamination from the vehicle's exhaust and to prevent exhaust fumes from entering the work area. • Set the parking brake and position the chock blocks in front of the front wheels. • Open and secure the rear doors in the open position with the bungee cords provided so that wind or vibrations will not cause the doors to swing into the work area during operation. • Attach the exhaust hose to the tailpipe and direct the exhaust downwind from the work area. • Start the vehicle engine with the remote ignition switch located on the side panel inside the rear of the vehicle. Switch the cooling fan to the "on" position (switch in side panel). Set the toggle switch on the Geoprobe 8-A control panel to the middle (slow) position to activate the hydraulic system clutch. See Figure 3 for a diagram of the control panel. • Push the FOLD lever down to raise the derrick assembly from its resting position to clear the hydraulic hoses. The derrick assembly should be raised no more than 1 foot because of the clearance restrictions of the rear doors. • Push the EXTEND lever down to move the derrick assembly backward out of the vehicle. Watch the clearance of the derrick at the top of the door opening. Extend the derrick to the full back position so that the top of the derrick will clear the van doors when raising the derrick. • Push the FOLD lever down again to raise the derrick to a vertical posi- tion. 7