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I' 4 0 CONCLUSIONS AND RECOMMENDATIONS ' Based on the results of the investigation, Ramage Environmental concludes the following Between November 1, 2001 and January 31, 2002, the groundwater surface rose an average of 0 88 feet, and the groundwater flow direction and gradient remained relatively constant The plume of impacted groundwater at the water table appears to be defined and stable Concentrations of gasoline compounds in first groundwater beneath the site continue to decline, probably in response to source removal and natural attenuation ' Sandy soil intervals beneath the water table appear to be relatively continuous between the two CPT locations At both locations, groundwater within the first two sandy intervals below the water table appears to be impacted by gasoline compounds As such, the lateral extent of impacted ' groundwater in these two intervals remains undefined to the southeast (downgradient) of the site The wider aerial extent of impacted groundwater beneath the water table is probably due to the greater permeability of the deeper groundwater-bearing soils Vertically, the extent of impacted groundwater beneath the site is undefined Southeast of the site, the vertical extent of impacted groundwater is defined to a depth of less than 130 feet ' MTBE was not detected in any of the groundwater table or deeper groundwater samples collected during the investigation ' Based on these conclusions, Ramage Environmental recommends the following ' 1 Prepare a work plan, which outlines tasks to further Investigate the vertical and lateral extent of impacted groundwater beneath the water table, and to test the feasibility of soil and groundwater remedial options ' 2 On a quarterly basis, continue to monitor and sample groundwater from the monitoring well network The next monitoring event is scheduled for the end of April 2002 13