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I ' 13 May 2003 AGE-NC Project No 95-0173 Page 3 of 6 I Replacement of Well MW-13 letter, dated 22 July 2002,prepared by AGE and approved by SJCEHD by letter dated 31 July 2002 (Appendix A) 32 SOIL SAMPLING Due to the severe heaving sands encountered during the construction and abandonment of well MW-13 to 100 feet bsg,no sampling activities were performed during drilling of replacement well MW-13 (A-C) Instead, the boring was advanced to total depth (152 feet bsg)with a wood plug in I the lead drilling bit and without any sampling activities,upon reaching the total depth,tap water was deployed in the hollow stem augers prior to knocking out the wood plug as a counter measure to the upward heaving sand I3 3 EQUIPMENT DECONTAMINATION While advancing down-hole, each five-foot section of the hollow stem auger was pressure washed I prior to deploying down-hole Fanseate generated from decontaminating the equipment was placed in properly labeled DOT-approved model 17H 55-gallon drums and was stored on-site in an area lacking public access I 34 SAMPLE LOGGING Soil samples were not collected during drilling activities for MW-13 (A-C), since soil samples and descriptions have been obtained at the MW-13 location A boring log for original well MW-13 was included in Ground Water Monitoring Well Installation Report - Third Quarter 2000, dated 01 November 2000, and hthologic data to a depth of 150 feet bsg was collected by cone penetrometer testing (CPT-2A) and included in Cone Penetrometer Testing Site Investigation - IFourth Quarter 2001, dated 19 February 2002 A boring log for replacement well MW-13 (A-C) is included with Appendix B and documents the Icompletion of well MW-13 (A-C) Based on previous soil boring and cone penetrometer testing (CPT) data, the general hthology beneath the site with respect to replacement well MW-13 (A-C) Iis depicted in cross sectional view C-C' on Figure 3 Advanced GeoEnviron mental,Inc