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boring for well NMI Soil and groundwater analytical results are summarized in Tables 2 through <br />' 5 Soil boring logs and well construction details are presented in Appendix I <br />' Ground Zero personnel supervised Welenco in conducting a video survey of the water supply <br /> well in February 2000 to determine well construction details and evaluate the Integrity of the <br />' well casing The down-hole equipment, including the pump and 126 feet of piping, was removed <br /> from the well to allow access of the video survey equipment The video survey determined that <br /> the well was cased to a depth of approximately 193 feet below the top of the casing (btc) with <br /> open hole from approximately 193 feet btc to 233 feet btc The top of the well casing stands <br />' approximately 1 foot above the ground surface No perforations were observed in the well <br /> casing The well casing is in generally poor condition with numerous visible holes and/or poor <br />' joints between the depths of approximately 72 feet and 132 feet btc Very heavy scale was <br /> observed from approximately 160 feet btc to the total depth of the well casing (193 btc) <br />' Groundwater samples collected from the water supply well after the well survey contained low <br /> levels of dissolved gasoline constituents, including benzene and MTBE A copy of the video <br /> survey log is included in Appendix I Analytical results of water samples collected from the <br /> supply well are included in Table 6 <br /> 4.0 FIELD ME'T'HODS <br /> 4.1 Permitting and Protocols <br /> Well Installation permits were obtained from PHS/EHD prior to initiating fieldwork All fieldwork <br /> was performed In accordance with Ground Zero's Site Safety Plan A copy of the Site Safety Plan <br /> Is included in Appendix II <br /> 1 <br /> 4.2 Hollow Stem Auger Drilling and Installation of Shallow Zone Monitoring Wells <br /> Between October 16 and October 18, 2000, Spectrum advanced four borings (MW5 through MW8) <br /> Into the shallow water bearing zone (A Zone aquifer) utilizing a CME 85 drilling rig equipped with <br />' hollow stem augers The borings/wells were installed under the supervision of field geologist Sean <br /> Garvey Well locations are shown on Figure 3 <br /> Soil samples were collected at 5-foot Intervals using an 18-Inch long split barrel core sampler lined <br /> 6 <br /> data/groundze/tuleburg/reports/mud_haa_wel lreporL doe <br />