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ARCADIS SOP: Groundwater Sampling Using HydroPunchT"I 4 <br /> Rev.#: 011 Rev Date: March 3,2009 <br /> V. Health and Safety Considerations <br /> • Sample collection will be performed using procedures consistent with the project Health <br /> and Safety Plan. <br /> • Appropriate personal protective equipment must be worn by ARCADIS field personnel <br /> VI. Procedure <br /> The following steps will be followed during the collection of discrete-depth groundwater <br /> Samples using HydroPunchTM: <br /> 1.Select the desired groundwater sampling depth. <br /> 2.The drilling subcontractor will advance the borehole to approximately 2 feet <br /> above the depth from which a discrete water sample is to be obtained. <br /> 3.The drilling subcontractor will disassemble the HydroPunchTM sampling device <br /> according to the manufacturer's instructions to allow the sampler to be <br /> decontaminated. The sampler should be completely disassembled, including <br /> 0-rings and/or check valves. <br /> 4. Decontaminate the sampler as appropriate for the range of groundwater <br /> analytes to be sampled for, by washing with laboratory-grade detergent and <br /> potable water wash, followed by solvent rinse (if sampling for organics) and <br /> final rinse with deionized or distilled water. Check the condition of the 0-rings <br /> during each cleaning, and replace if necessary. <br /> 5.The drilling subcontractor will reassemble the decontaminated HydroPunchT"" <br /> sampling device according to the manufacturer's instructions and lower the <br /> device to the bottom of the borehole. <br /> 6.The drilling subcontractor will push or drive the HydroPunchTm 5 feet below the <br /> bottom of the casing or augers, then retract the sampler 3 feet upward. <br /> Subsurface friction will retain the drive point in place, exposing the screen and <br /> allowing groundwater to enter the sampling tool. <br /> 7.Allow sufficient time to allow the sampler to fill with water. Typically 30 minutes <br /> is sufficient, except in low permeability materials. <br /> 8.Collect a groundwater sample by: <br /> g:isop-IibraryVeformatted sops 20081hydrogeology sops298782-groundwater sampling using hydropunch.doc <br />