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<br />20181648.005A Page 1 of 2 October 4, 2021 <br />Copyright 2020 Kleinfelder <br />2001 Arch-Airport Road, Suite 100, Stockton, CA 95206 p | 209.948.1345 f | 209.234.4700 <br /> Geotechnical Engineering <br /> Materials Testing & Inspection <br /> Environmental Science & Engineering <br /> Water Resources <br /> Earthquake Engineering <br /> Air Quality <br />DATE: October 4, 2021 <br /> <br />PROJECT No.: 20181648.005A <br /> <br />To: San Joaquin County Environmental Health Department <br />1868 East Hazelton Ave. <br />Stockton, CA 95205 <br /> <br />SUBJECT: Work Plan for Monitoring Well Destruction Permit Application <br /> City of Stockton, Municipal Utilities Department <br /> Parcel 163-330-030-000, 2500 Navy Drive <br /> Stockton, San Joaquin County, California <br /> <br /> <br />Work will consist of the destruction of an existing standpipe piezometer monitoring well (MW-1) <br />at the existing City of Stockton, Municipal Utilities Department Facilities at 2500 Navy Drive, <br />Stockton, California (Parcel 163-330-030-000). The location of MW-1 is shown in the attached <br />map. <br /> <br />The existing standpipe piezometer monitoring well, MW-1, consists of a 2-inch PVC installed to a <br />depth of 50 feet. The MW-1 boring log and well diagram are also attached. MW-1 will be over- <br />drilled and grouted immediately upon completion of drilling in accordance with DWR Standards <br />by backfilling the borehole using a neat cement grout mix with a water to cement ratio of 3 gallons <br />of water per 47-lb sack of cement using a tremie pipe. <br /> <br />Kleinfelder has secured Geo -Ex Subsurface Exploration for the destruction of the existing <br />piezometer MW-1. The work is scheduled for October 19, 2021. A permit application for the <br />monitoring well abandonment is attached. <br /> <br />County fees of $621.92 ($456.00 Environmental Assessment + $152.00 Monitoring Well <br />Destruction permit fee + $13.92 convenience fee) were paid online on October 4, 2021 with <br />confirmation number 132700377. A copy of the confirmation is also attached. <br /> <br />If you have questions or require additional information, please contact us at 209-948-1345. <br /> <br />Sincerely, <br /> <br />KLEINFELDER, INC. <br /> <br /> <br /> <br />Asael Gutierrez <br />Staff Engineer <br /> <br /> <br /> <br />TECHNICAL MEMORANDUM