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r19 December 2005 <br /> . AGE-NC Project No 95-0141 <br />' Page 5 of 5 <br /> is a possibility that commingling is occurring with contamination detected at the adjacent <br />' Lopez property (also managed by AGE) to the northeast of the site <br />' 5.0. RECOMMENDATIONS <br />' Based on the results of this and previous investigations, AGE recommends <br /> • Continued quarterly monitoring of the ground water monitoring network <br />' 0 Preparation of a work plan for interim remediation of petroleum hydrocarbon-impacted <br /> ground water at the site and vertical definition of the dissolved hydrocarbons and additives <br />' in the source area as previously proposed The western area,under the main office building, <br /> appears to cover the highest dissolved mass at the site,therefore limited access technology <br /> may be required to assess hydrocarbon-impact in this area <br />' Preparation of a work plan for additional monitoring wells to define the contaminant plume <br /> to the northeast, ensuring that it has not commingled with contamination from the adjacent <br /> 10 <br /> Lopez property <br />' G.O. 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 hydrogeologic <br /> conditions at the site have been made from a limited number of available data points(i a monitoring <br />' wells and ground water samples) and subsurface conditions may vary away from these data points <br /> No other warranty,expressed or implied,is made as to the professional interpretations,opinions and <br />' recommendations contained in this report <br /> 1 <br />' Advanced GeoEnvironmental,Inc <br />