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i May 21,2014 Page 2 of 3 Reference: Well Destruction Report 7-Eleven Store #20632 4627 DaVinci Drive Stockton; California Well Destruction On March 24 through 28, 2014, Stantec supervised the destruction of seven groundwater_ monitoring wells(MW-1, MW-2,MW-3, MW-4R, MW-5, MW-6, and MW-7) and two remediation wells (SPV-1 and SPV-2), by National Exploration, Wells, and Pumps (National EWP) of.Richmond, California (Figure 2 and Table 1). Wells MW-1, MW-3, MW-5, MW-6, MW-7, and SPV-1 were destroyed by overdrilling each well with hollow-stem augers to completely remove all well materials.Each void was then backfilled from total depth to the surface with neat cement grout. Due to the close proximity of underground utilities, wells MW-2 and-SPV-2 were destroyed by pressure grouting,which consisted of filling the well and filter pack with neat cement grout through a tremie pipe from total depth to top of the well casing.The grout was allowed to settle and then topped off before pressure was applied to the wells at 25 pounds per square inch for ten minutes. The top of these well locations was finished with asphalt. Due to the presence of a large amount of:pea gravel around MW-4R, it was not possible to clear the hole to five feet using an air knife and vacuum truck.The SJCEHD approved destruction of this well by pulling the casing out while filling the void with neat cement grout from the bottom up through the casing.The end cap of the casing was knocked out with a steel.rod and left in place. SJCEHD approval of the destruction methods for MW-2, MW-4R, and SPV-2 are included in Attachment A. Following destruction, all well boxes and concrete aprons were removed. Copies of the field notes summarizing well destruction activities are provided,in Attachment.C. Copies of the California Department of Water Resources (DWR) Well Completion Reports are provided in Attachment D. Waste Disposal Soil and debris generated during well destruction.activities was temporarily stored onsite in a roll- off bin.The bin was picked up by American Integrated Services, Inc. on April 7, 2014 and transported to Potrero Hills Landfill, in Suisun, California. Decontamination water was temporarily stored in a 55-gallon drum; this drum was picked up by Belshire Environmental Services;Inc.on April 15, 2014, and transported by Nieto &Sons Trucking, Inc. to Demenno Kerdoon in Compton, j California on April 24, 2014. Copies of waste manifests are included in Attachment E. Summary On March 24 through 28,2014, Stantec supervised National EWP during the destruction of seven groundwater monitoring wells and two remediation wells. Debris generated during well Design with community in mind I I