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r <br /> r20 February 2001 <br /> • AGE-NC Project No 99-0559 <br /> rPage 4 of 5 <br /> r4.0. SUMMARY AND CONCLUSIONS <br /> Based on data collected during the monitoring event, AGE concludes <br /> r • The current ground water flow direction was determined to be to the east-southeast which <br /> is consistent with past ground water flow directions <br /> r0 Free floating gasoline continues to be observed in MW-2, located in the area of the USTs <br /> High concentrations of TPH-g, BTE&X and MTBE are present in the three surrounding <br /> ground water monitoring wells In general, the dissolved hydrocarbon concentrations have <br /> increased in wells MW-2,MW-3 and MW-4 A slight decrease in hydrocarbon concentrations <br /> has occurred in MW-1 The limits of impacted ground water has not been defined <br /> r <br /> I5.0. RECOMMENDATIONS <br /> Based on the findings and conclusions in this report, AGE recommends the following <br /> Additional assessment of the hydrocarbon and MTBE-impacted soil should be conducted <br /> directly north, west and east of the UST area to determine the lateral extent of the plumes <br /> IThe vertical extent of impacted soil and ground water should be assessed <br /> • Additional assessment of the ground water is necessary to the west ofwell MW-4, southwest <br /> of well MW-3 and north of well MW-1 In additional, all ground water monitoring wells <br /> Ishould be monitored on a quarterly basis <br /> • Interim ground water remediation should proceed immediately to iniiinme the migration of <br /> Ithe free-product and high concentrations of MTBE <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 sirdar localities The findings were based mainly upon <br /> analytical results provided by an independent laboratory Evaluations ofthe geologic/hydro-geologic <br /> conditions at the site for the purpose of this investigation are made from a limited number of available <br /> data points (e g ground water samples), and subsurface conditions may vary away from these data <br /> points No other warranty, expressed or unphed, is made as to the professional recommendations <br /> contained in this report <br /> Advanced Geoi+nvironmental,Inc <br />