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Geological Tec/utus Jnc <br /> Page 5 <br /> Tank Closure Testing Report <br /> Project No. 1218.2 I <br /> k� August 3,2005 '` <br /> • <br /> The contamination appears to be defined vertically in that the 14 ft samples contain <br /> such low concentrations of TPH-G& MPH-D. <br />_ • The contamination is roughly defined to the north and northwest of the former <br /> dispenser. <br /> • The contamination is limited to soil and is not likeiy to reach the groundwater table, <br /> which is expected to be approximately 60 to 70 feet bgs. <br /> 2. Given the data presented above and given that the source was removed years ago, we <br /> conclude that even though there is some small amount of gasoline and diesel present in <br /> the shallow subsurface, the residual petroleum is stable and will not significantly migrate <br /> any further or impact the site an more then current levels. <br /> p y i <br /> Recommendations <br /> E • Consider the site for no further action. <br /> • However, if remedial action is directed, GTI would recommend limited soil excavation of <br />' the contaminated soil between 10 and 15 feet bgs. Initial estimates suggest approximately <br /> 20 cubic yards of soil are impacted. �G <br /> 3� <br /> 5.0 LINIITATIONSs <br /> .r <br /> This report was prepared in accordance with the generally accepted standard of care and <br /> practice in effect at the time Services were rendered. It should be recognized that definition <br /> i and evaluation of environmental conditions is an inexact science and that the state or practice <br /> f of environmental geology/hydrology is changing and evolving and that standards existing at <br /> the present time may change as knowledge increases and the state of the practice continues to <br /> improve. Further, that differing subsurface soil characteristics can be experienced within a <br /> small distance and therefore cannot be known in an absolute 'sense. All conclusions and <br /> recommendations are based on the available data and information: <br /> �9 E <br /> The tasks proposed and completed during this project were reviewed and approved by the <br /> local regulatory agency for compliance with the law. No w array ty, expressed or implied, is <br /> made. <br /> . �i <br />