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Robert A. Sullivan <br />21 May 2007 <br />Page 2 <br />The groundwater monitoring well will be installed using a truck -mounted rotary drill rig equipped <br />with hollow -stem augers. The boreholes will measure 8.25 inches diameter and will be drilled to a <br />depth of approximately 45 feet below grade. The borehole will be completed as a 2 -inch -diameter <br />groundwater monitoring well. The well will be secured with a locking cap and completed at the <br />surface with a flush mounted, traffic rated steel well box. <br />The work is expected to take approximately 1 day. All materials generated during drilling activities <br />will be stored at the former service station property. <br />As required by the CRWQCB-CVR, the well will be sampled every three months. The sampling will <br />require our technician to be onsite for approximately 1 day. All equipment and materials used for <br />sampling will be removed from your site upon completion of the work. We will make every attempt <br />to minimize the impact to your tenants and will notify them prior to the installation of the well. <br />ETIC will be responsible for any damage that may be caused to your property as a result of and <br />limited to the borehole drilling. After completion of the project, the well will be removed according <br />to the applicable well standards and the drilling location will be properly resurfaced to match the <br />surrounding conditions. <br />G TrojmtW-CASTublic�C=S�Ot6uc Ac X99 -CAS -MO N EI Dorado Sv A., <br />