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0 <br /> Mr. Arthur Lavagnino 26 December 200k rO Q9,PJ, <br /> Ms. Jonnie L. Lavagnino Page 2 <br /> The vapor sampling wells will be installed using a hand auger. The boreholes will measure between <br /> approximately 4—6 inches diameter and will be drilled to a depth of approximately 5.5 feet below <br /> grade. The borehole will be completed as a vapor sampling well. The well will be secured with a <br /> flush mounted, traffic rated steel well box. <br /> The groundwater monitoring wells 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 44 feet below grade.The boreholes will be completed as a 2-inch-diameter <br /> groundwater monitoring wells. The wells 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 4 days.. All materials generated during drilling activities <br /> will be stored at the former service station property. <br /> As required by the CRWQCS, the wells will be sampled every three months for the groundwater <br /> monitoring wells and at least once following their installation for the soil vapor sampling wells. The <br /> sampling will require our technician to be onsite for approximately 1 day. All equipment and <br /> materials used for sampling will be removed from your site upon completion of the work. We will <br /> make every attempt to minimize the impact to your tenants and will notify them prior to the <br /> installation of the well. ET1C will be responsible for any damage that may be caused to your <br /> property as a result of and limited to the borehole drilling. After completion of the project,the wells <br /> will be removed according to the applicable well standards and the drilling location will be properly <br /> resurfaced to match the surrounding conditions. <br />