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above the sandpack and the remaining annular space was backfilled with a neat cement grout. <br /> The borings were finished with water tight security traffic boxes to protect from vandalism or <br /> ' entry of surface fluids. Typical construction details are shown on Figure 3. <br /> 5.0 GEOTRACKER DATA UPLOAD <br /> The site facility global ID number is T0607700858. The laboratory data was submitted <br /> ' electronically to the State Water Resources Control Board (SWRCB) Geotracker database <br /> (confirmation number 3730105757). Documentation of the data submittal is contained in <br /> Appendix C. <br /> 6.0 REMEDIATION SYSTEM INSTALLATION <br /> ' 6.1 Trenching and Piping Activities <br /> During the week of May 10, 2004, ATC supervised the trenching and plumbing activities to install <br /> ' the subsurface piping that directs ozone from the C-SpargerTm ozone generator inside the <br /> remediation compound to SpargepointsR IWI through IW5. <br /> Cruz Brothers subsurface locators scanned the location of the proposed subsurface piping prior to <br /> beginning trenching activities. Cal-West Concrete Cutting sawcut the asphalt surface of the site in <br /> ' the locations where the subsurface piping was going to be installed. NRC Environmental removed <br /> the asphalt debris and excavated the trenches to the specifications contained in GHH's Interim <br /> Groundwater Treatment System, .Tamar Service, 4075 East Main, Stockton, California, dated <br /> ' October 2003. The asphalt debris was transported and disposed of at the Forward Landfill in <br /> Stockton, California. The excavated soil was used as backfill material for the trenches when <br /> plumbing activities were completed. <br /> ' ATC personnel installed the double-contained flexible subsurface piping and wellhead connections <br /> between the SpargepointR risers and the remediation compound. After all the subsurface piping had <br /> ' been installed ATC pressure tested the lines by generating a vacuum in each line with an air <br /> compressor and making sure each line sustained the vacuum for at least 15 'minutes. <br /> After pressure testing the lines, the trenches were backfilled with native soil to approximately 4 <br /> inches below grade by NRC Environmental. The aggregate was compacted and the trench locations <br /> were resurfaced with asphalt to match the pre-existing site conditions by D. Willson Construction <br /> Company, Inc. <br /> 6.22 Remediation ComRound and Ozone Air Sparge E ui ment Installation <br /> ' The concretead for the remediation zon compound was poured the week of June 9, 2004 by D. <br /> Willson Construction Company, Inc. The concrete pad is 15 feet long and 10 feet wide and is <br /> shown on Figure 4. The remediation compound was fenced during the week of June 14, 2004 by <br /> w;lwordpro1261231reportslremsysinst.doc 4 <br />