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1 <br /> 29 March 2004 ; <br /> AGE-NC Project No. 97-0327 <br /> Page 12 of 12 <br />' Level (AL) of 12 gg/l; action levels are health-based advisory levels and not enforceable <br /> standards. <br /> • The lateral extent of the dissolved petroleum hydrocarbon ground water plume is defined to <br />' the southeast; the vertical extent of the plume is not well defined. <br /> 9.0. RECOMMENDATIONS <br />' Based upon petroleum hydrocarbon distribution patterns and migration pathways identified in the <br /> site conceptual model,AGE recommends addition of two paired soil borings for cone penetrometer <br /> testing and sampling of deep ground water to define the vertical and lateral extent of dissolved <br /> 1,2-DCA. U K— <br /> �� . <br />' 10.0. 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 <br />' . geologic/hydrogeologic conditions at the site for the purpose of this investigation are made from a <br /> limited number of available data points (e.g. soil and ground water samples, ground water <br /> monitoring), and subsurface conditions may vary through time or with distance from these data <br />' points. No other warranty, expressed or implied, is made as to the professional interpretations, <br /> opinions or recommendations contained in this report. <br /> 1 <br /> 1 <br /> 1 <br /> l <br />