Laserfiche WebLink
' GEOMATFIX <br /> "hydrocarbon mode," the sample is collected by lowering a narrow diameter bailer through <br /> ' the drive rod (minimum 1-inch-diameter) and bailing out the volume of groundwater required <br /> for analysis. The screen and drive point are left in the hole as the HydroPunch' II tool is <br /> ' removed. <br /> ' When the sample is retrieved to the surface, it is decanted into laboratory-prepared sample <br /> containers suitable for the analysis desired. The HydroPunch' is then disassembled for <br /> decontamination and preparation for subsequent sampling depths. The HydroPunch' I can be <br /> continued in the same borehole to the next desired sampling depth. <br /> 4.0 EQUIPMENT DECONTAMINATION <br /> The Enviro Probe' and HydroPunch' are cleaned by complete disassembly, including 0-rings <br /> ' and/or check valves, followed by a laboratory-grade detergent and potable water wash and <br /> ' then followed by a deionized-water rinse. All decontamination rinsate will be collected and <br /> stored properly for future disposal by the client, unless other arrangements have been made. <br /> ' The condition of 0-rings should be checked during each cleaning and replaced as necessary. <br /> The screen should be discarded after each use. The tool will be assembled after cleaning, <br /> ' following the instructions provided in the appropriate sampling kits. <br /> ' 5.0 EQUIPMENT CONSTRAINTS <br /> ' The Enviro Probe' and its associated GMS assembly require drive rods of a minimum 1-inch <br /> inside diameter. HydroPunch' I and HydroPunch' II (in the "groundwater mode") require <br /> drive rods of sufficient diameter to allow passage of the well sounder, generally about lh inch. <br /> HydroPunch' lI in the "hydrocarbon mode" (water table sampling) requires drive rods of a <br /> ' minimum 1-1/8-inch diameter to allow passage of the 1-inch-outside-diameter bailer. <br /> 1 As stated earlier, HydroPunch' I (and HydroPunch' H in the "groundwater mode") cannot be <br /> ' used at sampling depths less than 5 feet below the water table. HydroPunch' I, when full, <br /> DISCRETE-DEPTH SAMPLING Page 5 of 6 <br /> ' MSCIPROTO-DS.TXT REVISION DATE: MARCH 1996 DS-5 <br />