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' 13 May 2003 . AGE-NC Project No 95-0173 ' Page 2 of b • 05 November 2002 - Well development activities performed at well MW-13 (A-C) • 22 November 2001 - Well elevation survey of well MW-13 (A-C) • 31 December 2002 - Initial ground water monitoring and sampling activities performed at well MW-13 (A-C) 2.0. MONITORING WELL ABANDONMENT ACTIVITIES A permit for replacement of original monitoring well MW-13 was obtained from the SJCEHD A Copy of permit is included with Appendix A A copy of the driller's field log is included with Appendix B Drilling activities for abandonment of well MW-13 was performed by Cascade Drilling Inc under the supervision of the SJCEHD Well abandonment activities were performed utilizing a CME-75 mobile drill ng equipped with 10'/4-inch hollow stem augers,original well MW-13 was over-drilled to a total depth of 100 feet bsg The well casing from MW-13 was removed from the boring and ' • inspected by a representative of SJCEHD, following inspection, the above referenced well casing was hauled off-site for landfill disposal The over-drilled bonng was backfilled with a portland type H cement grout mixture Twenty-four 94-pound bags of portland cement were utilized to backfill the boring, a ratio of six gallons water for every 94-pound sack of portland cement was utilized in preparation of the grout mixture The boring was completely backfilled to surface grade with the portland cement grout mixture utilizing the string of hollow stem auger flights as a tremae pipe 3.0. MULTI-LEVEL MONITORING WELL INSTALLATION On 24 October 2002,a replacement well, multi-level ground water monitoring well MW-13 (A-C), was installed at the site a few feet adjacent the former location of MW-13 31 DRILLING A soil boring was advanced for MW-13 (A-C)vertically to a depth of 152 feet bsg utilizing a CME- 75 high torque,truck-mounted drill ng equipped with S'/4-inch diameter hollow-stem augers All soil I cuttings generated from drilling activities were stockpiled at the site and covered with plastic sheeting in a east section of the site, the location of the soil bonng/monitoring well is depicted in Figure 2 Ground water monitoring well installation procedures for the site were outlined in AGE's IAdvanced GeoEnvironmental,Inc 1