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— Campbell Taggart Inc. December 14, 1990 <br /> 202/029000-390 Page 4 <br /> land area for soil treatment, and can lead to large quantities of hydrocarbons being released to the <br /> atmosphere, which may not be allowed by regulatory agencies. <br /> Controlled aeration involves inducing air flow through a soil treatment cell using a high-vacuum <br /> blower. This process has the advantage over landfarming in that less space is required, emission controls <br /> can be used at the exit of the blower, and volatilization and oxygen transfer rates can be maximized. <br /> — The remediation alternatives are summarized in Table 1. Bioremediation is recommended as the <br /> best technology to remediate the excavated soils at the site. The recommendation is based on the relatively <br /> — low cost, short duration of the project, and the elimination of environmental concerns. <br /> TABLE 1 <br /> REMEDIAL ALTERNATIVES SUMMARY <br /> TECHNOLOGY ADVANTAGE DISADVANTAGE <br /> Haul and Dispose Shortest time frame. Expensive. Contamination <br /> nottreated. Generatornot <br /> released of liability. <br /> Thermal Treatment Destroys hydrocarbons. Air permit required. <br /> Time efficient for small Produces by-products. <br /> soil volumes. Expensive. <br /> Bioremediation Inexpensive. Short term Requires on-site space. <br /> remediation time. May generate a leachate <br /> 5.0 SCOPE OF WORK <br /> Groundwater Technology will conduct this project in two work phases: Phase I will consist of an <br /> initial assessment (soil sampling and excavation) to determine the nature and extent of contamination (for <br /> the purpose of remediation) and will include: <br /> Preparation of Site-Specific Health and Safety Plan as required by the <br /> — Occupational Health and Safety Administration (OSHA) guidelines 29 CFR <br /> 1910.120. <br /> GROUNDWATER <br /> TECHNOLOGY, INC. <br />