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File: PW86-2005 <br /> March 4 , 1986, <br /> Page 2 <br /> slurry. Mr. Renaldo Crooks of San Joaquin County has stated a <br /> well would not be necessary unless soil samples indicated possible <br /> migration of the hydrocarbons into the ground water. Should field <br /> screening of soil samples show organic vapors to be present at or <br /> near the water table the county would require the installation of <br /> a monitoring well and associated ground water sampling and <br /> analysis . <br /> J. H. Kleinfelder and Associates will have available on site <br /> at the time of drilling all material and equipment necessary for <br /> the construction of a County approved monitoring well. We feel it <br /> would be more cost effective to install the monitoring well in the <br /> exploratory boring than to remobilize a drill rig and install a <br /> well at a later date. The decision to install the monitoring well <br /> would be based on information gathered during drilling of the <br /> exploratry boring and on soil PID screening results. The well <br /> would be constructed of 2.0 inch NSF approved flush threaded PVC <br /> casing. The well would be installed to an approximate depth of 15 <br /> feet below encountered water surface, and would be screened 15 <br /> feet below and 5 feet above the water table. The screened <br /> sections of the well would utilize 0.020 inch machined slotted PVC <br /> screen with a washed Monterey sand pack. A 2 foot bentonite seal <br /> would be placed above the sand pack and the remaining annular <br /> space would be sealed with a cement/bentonite slurry. The well <br /> would be completed with a locking steel well cover set <br /> approximately 2 to 3 feet above ground surface. <br /> The exploratory boring will be logged by an experienced <br /> Kleinfelder geologist. Well/boring logs, boring location map and <br /> a report with analysis of results will be provided. <br /> COST ESTIMATE <br /> J. H. Kleinfelder will provide our professional services on a <br /> time and material basis in accordance with our 1986 Environmental <br /> Services Fee Schedule. The following cost estimate is provided <br /> for your budgetary consideration and is based on available <br /> information provided to us and our experience with projects <br /> similar in scope. <br />