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1 WATC <br /> 1 <br /> A S S O C I A T E S I N C <br /> ♦ Criterion b <br /> The long term effectiveness would be considerable if the entire area of impacted soil is <br /> ' removed from the site, preventing any possibility of contamination of groundwater <br /> ♦ Cntenon 7 <br /> This alternative would have implementabihty difficulties due to the proximity of impacted soil <br /> to the building <br /> ' ♦ Criterion 8 <br /> The unmediate impact to the nearby community would be considerable Negative impacts <br /> would include noise, traffic congestion, dust, and volatilization of the contaminants These <br /> ' inconveniences may hinder community acceptance of this alternative <br /> 72 Soil Vapor Extraction <br /> ♦ Criterion 1 <br /> This alternative has nunimal health-based risks Petroleum hydrocarbons are removed from <br /> extracted vapor prior to release to the atmosphere thus eliminating the risk of exposure to <br /> humans The potential fire or explosion hazard is niirumal due to the relatively low levels of <br /> documented residual hydrocarbons, and would be further mirumized with a properly designed <br /> system and regularly scheduled monitoring and maintenance <br /> ' ♦ Criterion 2 <br /> Vapor extraction has the ability to reduce the level of tonicity, mobility, and volume of <br /> contaminants in the soil to levels acceptable to regulatory agencies A pilot test would have to <br /> 1 be conducted to verify that this is a feasible alternative for remediation of the site <br /> ♦ Criterion 3 <br /> 1 This alternative can be implemented within regulatory guidelines <br /> ♦ Criterion 4 <br /> The soil vapor extraction remediation alternative would require the installation of two vapor <br /> extraction wells and the abatement equipment A pilot test would be conducted to determine if <br /> this remedial option is feasible If the pilot test indicates this remedial option is feasible, vapor- <br /> phase carbon can be used for treatment of off-gases It may be necessary to utilize another off- <br /> gas abatement method or install additional wells, which would require additional capital outlay <br /> 1 Other costs to the client would be incurred for permitting, leasing, and installing the vapor <br /> extraction equipment and treatment compound, operation and maintenance of the system, <br /> reporting, and confirmation soil borings to verify soil contamination has been remediated The <br /> 1 cost of this alternative is estimated to be between$140,000 and $220,000 <br /> w 1943044ciwrtsklosum doe 8 <br />