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' PROTOCOL GEOMATRIX <br /> ' DISCRETE-DEPTH SAMPLING <br /> 1.0 INTRODUCTION <br /> ' This protocol describes the procedures to be followed during collection of discrete-depth <br /> groundwater samples using either the Enviro Probe or the HydroPunch'. These tools are <br /> ' generally used to collect groundwater samples for chemical analysis during groundwater <br /> screening programs, and in some cases to measure water levels or pore pressure at discrete <br /> ' depths. <br /> iA DAILY FIELD RECORD will be completed for each day of fieldwork, and the original will <br /> t be kept in the project files after review by the project manager. Soil borings drilled in <br /> conjunction with the collection of discrete-depth groundwater samples will be in accordance <br /> ' with the protocol DRILLING and DESTRUCTION OF SOIL BORINGS. Groundwater <br /> samples collected for chemical analysis should be handled in accordance with the protocol <br /> ' SAMPLING OF GROUNDWATER MONITORING WELLS AND WATER SUPPLY <br /> WELLS. <br /> ' The procedures presented herein are intended to be of general use and, where necessary, may <br /> ' be supplemented by a work plan and/or health and safety plan. As the work progresses, and if <br /> warranted, appropriate revisions may be made by the project manager. Detailed procedures in <br /> ' this protocol may be superseded by applicable agency requirements. <br /> ' 2.0 SAMPLING EQUIPMENT <br /> ' The Enviro Probe and HydroPunch' can be used with several subsurface exploration <br /> ' methods, including hollow stem auger drilling, mud rotary drilling, and cone penetrometer <br /> testing (CPT). Selection of the appropriate sampling tool should be based on anticipated field <br /> ' conditions such as the site hydrogeology (e.g., depth of sampling location below the water <br /> DISCRETE-DEPTH SAMPLING Page 1 of 6 <br /> ' MSOPROTO-DS.TXC REVISION DATE:MARCH 1996 DS-1 <br />