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r Cardna� November 3,2014 ATC Glover Well Destruction Report Shaping the Future Cardno ATC requested a variance for the well destruction method regarding these two well and was approved by SJCEHD. 2.4 Well Destruction Activities Cardno contracted with Gregg Drillind_&�Testing, Inc., a C-57 licensed drilling company, to complete the I well destructions. All five remediation wells and monitoring wells, MW-1 through MW-5, MW-7, and MW- 8 were abandoned August 25 through August 27, 2014. All twelve wells were destroyed by over drilling to total depth and then grouting through a tremie pipe from the bottom up. MW-6 and MW-9 were destroyed on August 29, 2014 by grouting in place and then adding air at 25 psi for five minutes. All well boxes were removed prior to well destruction activities. Table 1 summarizes the well construction and destruction detail. Additional cement was poured into the top of the well borehole, as necessary. Field notes of the destruction activities are in Attachment 2. The surface pavement was repaired to match the surrounding grade. As required by the Department of Water Resources, well completion reports were completed, signed by Gregg Drilling, and submitted to the Department of Water Resources. Copies of the signed well completion logs are included in Attachment 4. 2.5 Waste Disposal I Investigation derived waste (IDW) including soil cuttings and any decontamination water generated during the well destruction activities were contained in 55-gallon drums and temporarily stored on site. The IDW was profiled an removed on September 30, 2014 by an approved waste hauler and disposed of at the Potrero Hills Landfill disposal facility in Suisun, California on October 1, 2014. No waste associated with this facility remains on-site. A copy of the waste manifest documenting IDW disposal is included as Attachment 3. 5