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January 2, 2007 <br /> NOA PROJECT NUMBER E06109A <br /> overdrilling and grouting of monitoring well LP-5. The concrete wellhead protection was <br /> removed. The drill rig (B-53 Mobile Drill rig) lined up on the borehole and set the A-rod <br /> to total depth of the casing. The borehole was drilled with 10 inch OD hollow stem <br /> augers. The borehole was drilled to total depth, the casing removed and the borehole <br /> was grouted to the surface. All cuttings were placed on visqueen and wrapped to prevent <br /> erosion of the stockpile. All rinse water was placed into a 55-gallon drum. <br /> A monitoring well abandonment borehole log is attached as Appendix B - Borehole Logs <br /> - Plate B1 . <br /> 3.0 INSTALLATION OF MONITORING WELL LP-513 <br /> The purpose of monitoring well LP-513 is to replace the abandoned monitoring well LP-5. <br /> NOA contracted with V Et W Drilling of Isleton, California to drill and construct the <br /> monitoring well. The monitoring well was drilled on December 19, 2006. <br /> 3.1 Monitoring Well Locations <br /> Appendix A - Plate 3 is a site map showing the location of the monitoring well LP-513. <br /> 3.2 Pre-Drilling Permits and Safety Meeting <br /> Prior to drilling, well drilling permits were updated at the San Joaquin County <br /> Environmental Health Department, and a check for any existing underground utilities was <br /> conducted at the drill location. Also, a brief "tailgate safety meeting" was conducted <br /> to inform the well installation crew of anticipated hazards and the emergency action <br /> plan for the site. On-site workers used Level D personal protection equipment. <br /> 3.3 Borehole Installation <br /> The borehole for LP-5B was drilled onsite December 19, 2006. The monitoring well LP-513 <br /> was completed on December 19, 2006. The borehole was drilled by a BK-81 drill rig <br /> owned and operated by V Ft W Drilling. The soil borehole was advanced using eight inch <br /> OD hollow stem augers and soil samples were collected every five feet using the <br /> California Modified Standard Penetration Test. The on-site geologist collected soil <br /> samples and produced a log of the borehole. All cuttings were placed on visqueen and <br /> wrapped to prevent erosion of the stockpile. All rinse water was placed into a 55-gallon <br /> drum. <br /> 3 .044 <br />