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SimulProbe®Technologies, Inc. Maxi SimulProbe®Soit/Groundwater Mode valve handle at either of the two side ports connects the central port to that side port. 3.29 Disconnect the Teflon line from the regulator and hook it onto the side of the spool. 3.30 Slowly lower the SimulProbe® to the bottom of the bore hole and hammer it 21 inches into subsurface to collect the soil core. 3.31 Pull the SimulProbe(D back 2 to 3 inches to retract the sliding Drive Shoe and expose the Circular Screen. 3.32 Open valve to allow pressure bleed off through the short length of Teflon tube attached to the valve. 3.33 Allow water to enter tool under ambient hydrostatic pressure. After the initial pressure bleed of, the fill rate can be observed by placing the open end of the Teflon tube into a bucket of water. For fast to moderate fill rates, the end of the Teflon tube can be placed inside an inverted water filled bottle inside the bucket (i.e. one liter plastic soda bottle). When the bottle is full of air displaced from ground water entering the Water Canister, it can be reused for additional volume measurements. 3.34 After sufficient water sample has been collected, re-pressurize the SimulProbe(D by following steps in Sections 3.26 through 3.29. 3.35 Pull the SimulProbe® to a few feet below the top of the casing and de- pressurize. Note: for safety, the SimulProbe® should always be pressurized and de-pressurized inside the casing. 3.36 Remove the SimulProbe®from the casing and stand it vertically on ground. 3.37 To remove water canister, unscrew the Water Canister Base from the Core Barrel Primary Half (using spanner wrenches). Keep the Water Canister upright to minimize sample agitation, and insert a short length of 1/4-inch OD Teflon tube through the bottom of the Reed Valve to drain and collect a water sample from the bottom of the Water Canister. 3.38 Disassemble the core barrel using SimulProbe@ wrenches and remove the soil core. 6