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Task 1 . 3: <br /> Based on the results of Tasks 1 . 1 and 1.2 , three <br /> to four additional ground water monitoring wells <br /> will be installed offsite to aid in definition of <br /> previously detected hydrocarbons in the vicinity <br /> of the site. The final location of these wells <br /> will be selected after completion of Task 1 . 2. <br /> Procedures for drilling, soil sampling, well <br /> installation and development, and water sampling <br /> and analysis will be in accordance with the <br /> standard procedures and applicable requirements <br /> and guidelines of the RWQCB and SJCEHS. <br /> The wells will be drilled using a CME 55 or 75 <br /> truck mounted drilling rig with 10-inch-diameter <br /> hollow stem augers , following the standard <br /> procedures and requirements of the governing <br /> regulatory agencies . Encroachment permits or <br /> other necessary access rights will be obtained <br /> before commencing with drilling activities . An <br /> underground utility locator will be required to <br /> verify/confirm the location of underground <br /> utilities and interferences before drilling any <br /> wells. <br /> During drilling, soil samples will be collected at <br /> no greater than 5-foot intervals, beginning at 5 <br /> feet below grade and continuing to the capillary <br /> fringe of the saturated zone. Soil samples will <br /> also be collected from the saturated zone and <br /> tested for physical properties (i.e. vertical <br /> permeability, atteburg limits etc. ) to evaluate <br /> physical parameters of the aquifer. Soil samples <br /> _ will be obtained with a split spoon sampler lined <br /> with clean stainless steel tubes. The samples <br /> recovered for chemical analysis will be sealed <br /> with aluminum foil and plastic caps, taped and <br /> labeled, and placed immediately into an iced <br /> cooler and delivered to a California certified <br /> analytical laboratory under chain of custody. <br /> Each well will be constructed to a depth of <br /> approximately 15 feet below the top of the <br /> saturated zone unless a competent clay layer is <br /> encountered. Each monitoring well will be <br /> constructed of clean, 2-inch-diameter, <br /> flush-threaded, Schedule 40 PVC blank. Based on <br /> boring logs of the existing ground water <br /> monitoring wells onsite, it is anticipated that <br /> the proposed wells will be constructed using a <br /> 0.020-inch slot size and the appropriate <br /> corresponding filter pack material. <br /> I <br />