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collecting soil samples from the borings, developing and sampling the newly installed wells, analyzing soil and groundwater samples for TPHg and BTEX using EPA Methods ' 801518020, and preparing a status report A copy of the Status Report is included in Appendix 3 ' During the investigation Ground Zero observed the drilling of seven onsite soil borings (SB- 24 through SB-27, SB-29, SB-32, and SB-37) and four offsite soil borings (SB-33 through SB-36) Proposed soil borings SB-28, SB-30, and SB-31 (intended as confirmation borings) ' were not drilled in the area of the former USTs as originally proposed due to the detection of gasoline hydrocarbons beneath the former USTs during drilling of boring SB-27 Soil borings SB-25 and SB-26 were drilled to depths of approximately 40 feet bgs Soil borings ' SB-24, SB-29, SB-32, and SB-37 were drilled to depths of approximately 55 feet bgs Angle boring SB-27 was drilled to a vertical depth of approximately 15 feet below the UST excavation Soil borings SB-33 through SB-36 were drilled to depths of approximately 75-78 feet bgs Boring logs are included in Appendix 4 Soil borings SB-24 through SB-26, SB-29, and SB-37 were temporarily plugged at a depth of approximately 5 feet bgs because subjective analysis of drill cuttings and logged sediments indicated borings SB-24 through SB-26 and SB-29 would be effective vapor test well ' locations, and boring SB-37 would be an effective monitoring/ambient air well location Borings SB-27 and SB-32 were grouted to the surface using neat cement I ' Groundwater was observed at depths ranging from approximately 57 to 59 feet during drilling of borings SB-33 through SB-36 Ground Zero observed Spectrum Exploration construct 2-inch diameter monitoring wells MW-9 through MW-12 in borings SB-33 through SB-36, respectively The monitoring wells were screened from approximately 55 to 75 feet bgs Construction details for these wells and previously existing monitoring wells are summarized in Table 1 and are graphically presented in the Boring Logs included in Appendix 4 Gasoline hydrocarbons were detected in soil samples collected from borings SB-24 through SB-27, and SB-29 Gasoline hydrocarbons were not detected in soil samples collected from offsite borings SB-33 through SB-36, and onsite borings SB-32 and SB-37 Analytical results for soil are summarized in Table 2 Laboratory analytical results and chain-of custody ' reports are included as Appendix 5 Groundwater was not present in wells MW-1 through MW-3 Groundwater elevation data measured during this investigation are summarized in Table 3 Gasoline hydrocarbons were detected in groundwater samples collected from onsite wells MW-4 through MW-6, and offsite wells MW-8 through MW-10 Gasoline hydrocarbons were not detected in groundwater samples collected from onsite monitoring well MW-7, or offsite wells MW-11 f and MW-12 Groundwater analytical results for samples collected during this investigation are summarized in Table 4 Laboratory analytical reports and chain-of-custody records are included as Appendix 5 grouvd7c%roeklcap 4 r