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31 July 2000 <br /> AGE-NC Project No 97-0249 <br /> Page 5 of 5 <br /> with bottled water for laboratory analysis for ethanol The laboratory analysis detected <br /> dissolved ethanol at a concentration of 22,000,ug/l Thereafter,AGE requested MSDS sheets <br /> from Sinclair Services, as well as other industry bentonite pellet manufacturers from Colloid <br /> Environmental Technologies Co (CETCO) and Polymer Dnllmg Systems (Pel-Plug) The <br /> MSDS sheets from all three bentonite pellet manufacturers listed ethyl alcohol and ethyl <br /> acetate on the bentonite coating <br /> 5.0. RECOMMENDATIONS <br /> Based upon data collected during May 2000, AGE recommends <br /> • Installation of additional ground water monitoring wells south, southwest, west, northwest, <br /> north and northeast of the current area bound by wells MW-1 through MW-6 to assess the <br /> lateral extent of the dissolved petroleum hydrocarbon plume (See Figure 2) <br /> • Installation of additional soil bonngs north, south, east and west of the current area bound <br /> + by wells MW-1 through MW-6 to assess the lateral extent of the adsorbed petroleum <br /> hydrocarbon plume <br /> Continued quarterly ground water monitoring, the next quarterly ground water monitoring <br /> event is tentatively scheduled for August 2000 <br /> Continued utilization of wells MW-1 through MW-6 for characterization of ground water <br /> conditions at the site <br /> • Continued coordinated quarterly ground water sampling events with Flag City Chevron <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the geologic/hydro- <br /> geologic conditions at the site for the purpose of this investigation are made from a limited number <br /> of available data points(e g ground water samples), and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or implied, is made as to the professional <br /> recommendations contained in this report <br /> 0 <br /> Advanced GeoEnvwonmental,Inc <br />