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' Mr. M. Scott Mansholt—CEMC <br /> Groundwater Monitoring Well Destruction Report November 17, 2009 <br /> Former Lyoth Loading Station <br /> Page 2 of 2 <br /> 23.15 and 31.7 feet below ground surface (bgs). All of the well heads were completed <br /> with a stovepipe-type well monument surrounded by three traffic bollards. <br /> ' Well destruction activities were conducted from October 26 through October 28, 2009. <br /> All well destruction activities were managed by on-site SAIC field personnel under the <br /> ' supervision of an SAIC California Professional Geologist. RSI Drilling (C-57 licensed <br /> driller) performed the well destruction. SJCDEH was notified of the well destruction <br /> activities prior to the commencement of field activities. <br /> The condition of each well was inspected prior to destruction. The total depth of each <br /> well was measured and confirmed with respect to the assumed well construction details. <br /> Each well location and surrounding traffic bollards were cleared for utilities by advancing <br /> t three perimeter hand-auger borings; these borings were advanced to 1 foot bgs for the <br /> bollards and 8 feet bgs for the wells. <br /> ' RSI Drilling removed traffic bollards and wellheads prior to overdrilling the wells. A <br /> CME75 truck-mounted drill rig fitted with 9.25 inch-diameter augers was used for <br /> overdrilling the sand pack and sealant to the total depth of each well. The boreholes were <br /> ' backfilled via trernie pipe by neat cement to the ground surface. <br /> All wastes—including concrete, well monuments, and PVC well-casing material—were <br /> stored on site pending disposal by Sturgeon & Son, Inc. <br /> ' Copies of the Well Completion Reports, as submitted to the California Department of <br /> Water Resources (DWR), are included as Attachment B. <br /> ' If you have any questions regarding this work, please contact me at (510)466-7161. <br /> Sincerely, <br /> ' SCIENCE APPLICATIONS INTERNATIONAL CORPORATION <br /> Michael Hurd, CHG 0068 <br /> Senior Environmental Project Manager y` '''`` UT,JT <br /> Enclosures: % <br /> ' Figure 1. Vicinity Map �^ <br /> Figure 2. Site Map <br /> Attachment A. Regulatory Correspondence and County Permits <br /> tAttachment B. DWR Well Completion Reports <br /> 1 <br /> t <br />