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I <br /> ,CVv:ATC <br /> A S S O C I A T E S I N C <br /> i <br /> 6 Long term effectiveness <br /> 7 Implementabdity <br /> 1 8 Regulatory and community acceptance <br /> 1 7.1 Soil Excavation <br /> ' ♦ Criterion I <br /> This altemative significantly increases the exposure of humans through volatilization of the <br /> contaminants and inhalation of and dermal exposure to dust and vapors created during <br /> 1 excavation activities The potential fire or explosion hazard should be rmnimal due to the <br /> relatively low levels of documented residual hydrocarbons <br /> ' ♦ Criterion 2 <br /> This alternative would not reduce the concentration of contaminants in the soil unless aeration <br /> of impacted soils occurs during transport and landfilling activities It would not be possible to <br /> 1 remove all the impacted soil without destruction of the building on site due to the proximity of <br /> the UST to the building Soil excavation would effectively eliminate the contaminants in the <br /> soil and would eliminate potential impacts on groundwater at the site by removing the source <br /> of contamination <br /> ♦ Criterion 3 <br /> This alternative can be implemented within regulatory guidelines <br /> Criterion 4 <br /> 1 This altemative is the least cost effective of the three alternatives due to high costs associated <br /> with implementation The fact that the impacted soil extends to a depth of 36 feet make this <br /> 1 alternative economically unfeasible The building on site would be damaged or extensive <br /> shonng would be required Costs associated with treating the soil on site or disposal of <br /> contaminated soil to an appropnate landfill and then backfilling the excavation with clean <br /> matenal also increase the total cost of remediation The cost of this remediation alternative is <br /> estimated to be between$200,000 and $400,000 <br /> ' ♦ Criterion S <br /> Soil Excavation would be effective in the short tern because it results in the direct removal of <br /> the contamination source Excavation would increase health-based nsks to humans via <br /> exposure of the impacted soil to the air and inhalation of and direct dermal contact with dust <br /> during site activities The time required to complete this alternative would be less than 6 <br /> months <br /> W 1943041r.p \clm=dm 7 <br /> 1 <br />