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i April 24, 1989 File No 1705-2 Depth to Water, ft. } (1/31/89) (3/3/89) MW-1 45.25 44.50 I MW-2 45.25 44. 30 MW-3 45.50 44 . 60 No clear indication of the direction of groundwater flow in the shallow groundwater system could be determined from available data Due to the very flat nature of the surface topography and the sediments, and the nearly identical depths at which groundwater is present in the wells, it is apparent that little indication of the overall groundwater flow gradient could be derived from these closely spaced wells Over time, f and with wellhead elevations for these wells, and possibly others, an indication of the J local flow direction and gradient may be possible A factor which may drastically affect the direction of flow in the subsurface is the presence of the large diameter pumping wells south and east of the site Identified in the "Preliminary Report", these wells may produce significant quantities of water during peak demand months and remain dormant at other times The localgroundwater regime, therefore, may be affected by these wells seasonally and on a day-to-day basis With significant drawdown created in the shallow groundwater around these wells, the flow direction at the site would be towards the south to southeast If no pumping occurs, an equilibrium condition may develop with groundwaterflow towards the local base level, probably the Deep Water Channel area to the west Well construction details, aquifer interconnecnon, exact distance from these wells and water withdrawals are clearly needed if any evaluation of the effects of these wells is to be made Little data were available to us for the preparation of this report regarding groundwater quality The information available suggests that groundwater is generally usable from the standpoint of general mineral characteristics In one well located approximately 150 yards east of the subject site, total dissolved solids content measured approximately R 1000 mg/l (milligrams per liter) However, organic solvents above drinking water stand- ards were found in this well Also, the benzene and other fuel constituent levels in all on-site wells exceeds acceptable drinking water standards The on-site wells exhibited organic compounds in the water MW_ had concentration of 6 08 mg/l, toluene and 117 m 1 and lene at 13 0 mg/ �ixene MW-3 had traces (ug/l or ppb) of benzene and other fuel constituent and groundwater. s revealed in the 2