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Table 2-1 Well Installation Details continued <br /> AQUIFER DEPTH SCREEN SOIL SAMPLES MONUMENT <br /> WELL ID ZONE Feet Feet Feet TYPE <br /> 8-inch Flush- <br /> TO/T-2C C 50 40 to 50 none Mount <br /> 8-inch Flush- <br /> TO/T-2D D 90 80 to 90 2.5, 5, 7.5 to 90 Mount <br /> 8-inch Flush- <br /> TO/WC-2C C 50 40 to 50 2.5, 5, 7.5 to 50 Mount <br /> 2.3 Groundwater Monitoring Well Development <br /> Following installation, the newly installed monitoring wells will be developed to increase <br /> sand pack permeability by removing fines and to reduce borehole sidewall smear. Prior <br /> to development, depth-to-water measurements will be collected and used to calculate <br /> purge volumes in each monitoring well. A well development rig operated by Cascade <br /> will be used to surge and pump each monitoring well to remove fines from the well and <br /> the surrounding annular pore spaces. The wells will be purged until a minimum of four <br /> borehole volumes are removed, purge water begins to clear, and field parameters (pH, <br /> conductivity, and temperature) stabilize to within 10 percent of the previous reading. <br /> A copy of ETG's standard well development data sheet is presented in Appendix A. <br /> 2.4 Groundwater Sampling <br /> Following installation and development of the 16 newly installed groundwater monitoring <br /> wells, a groundwater monitoring event will be conducted to assess groundwater quality in <br /> the newly installed wells at the site. During the monitoring event, groundwater samples <br /> will be collected from the 16 newly installed groundwater monitoring wells. All <br /> groundwater samples will be collected utilizing "low-flow" sampling techniques in <br /> accordance with the USEPA Low-Flow Groundwater Monitoring Procedures (USEPA, <br /> April 1996). ETG's standard operating procedures (SOPS) for "low-flow" groundwater <br /> sampling are presented in Appendix B. <br /> Groundwater samples will be collected from the disposable discharge tubing connected to <br /> the peristaltic pump and transferred directly to laboratory-supplied containers with as <br /> little agitation as possible. Information including sample ID, date and time, field <br /> parameters, requested analyses and other pertinent information will be recorded on a field <br /> sampling data sheet (FSDS). A copy of ETG's standard FSDS is presented in <br /> Appendix A. <br /> Sampling and Analysis Plan-Final 5/18/2012 <br /> 2-5 <br />