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PROTOCOL <br /> DISCRETE-DEPTH SAMPLING <br /> 1.0 INTRODUCTION <br /> t <br /> i <br /> This protocol describes the procedures to be followed during collection of discrete-depth <br /> groundwater samples using either the Enviro Probe or the HydroPuncV. 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 /> A DAILY FIELD RECORD will be completed for each day of fieldwork, and the original will <br /> be kept in the project files after review by the project manager. Soil borings drilled in <br /> La 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 this protocol may be superseded by applicable agency requirements.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 EQITIPMENT <br /> The Enviro Probe and HydroPun& 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 hydrogeoiogy (e.g., depth of sampling location below the water <br /> DISCRETE-DEPTH SAMPLING Page i of 6 <br /> MSOPROTO-DS.= REVISION DATE:MARCH 1996 J DS-1 <br />