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3 0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS l Between June 20, and September 17, 2003, the groundwater surface beneath the site dropped an average of 3 86 feet The groundwater gradient configured using the shallow-constructed wells increased from 0 0004 to 0 0024 foot/foot, and the flow direction shifted approximately 15 degrees toward the north The groundwater gradient configured using the deep-constructed wells increased from 0 0022 to 0 0045 foot/foot, and the flow direction shifted approximately 45 degrees toward the northeast Since the third quarter of 2002, the groundwater surface has dropped approximately 2 6 feet Since May 1992, the groundwater surface has risen approximately 19 4 feet Groundwater from Irrigation Well#2 did not contain detectable concentrations of any of the gasoline compounds analyzed Groundwater collected from Irrigation Well#2 has been free of gasoline compounds for 14 consecutive quarters ' Between June 20, and September 17, 2003 the concentrations of gasoline compounds in the groundwater monitoring wells remained relatively consistent MTBE in groundwater appears to be limited to the groundwater table to the northeast (downgradient) of the former UST As shown on 1 the isoconcentration map (Figure 6), the plume of groundwater impacted by MTBE is defined to the south by VW-1, to the east by MW-4, and to the northeast (downgradient) by MW-813 On June 20, 2003, Ramage Environmental submitted Work Plan for Groundwater Extraction, to attempt to reduce the MTBE concentrations in MW-5 and MW-7 On September 16, 2003, EHD approved the work plan On October 29, 2003, the UST Cleanup Fund pre-approved the cost to implement the approved scope of work, which included six monthly batch groundwater extraction events The first batch extraction event is pending contractor availability, and should be completed during the first quarter of 2004 1 7 s