| Tetrachloroethylene (PCE) is a recalcitrant, Group 2a carcinogenic compound, commonly used in dry cleaning operations and metal degreasing because it is a powerful solvent on organic materials. This thesis examined the use of ethanol flushing for the in situ removal of tetracholorethylene from a subsurface impacted area at a dry-cleaning operation in Eureka, California. Bench-scale testing was conducted using a modified version of the Test Method for Distribution Ratios by the Short-Term Batch Method ASTM 4319, to assess potential adverse impacts to soil and groundwater and to test the effectiveness of ethanol for the removal of PCE. Ethanol and the tracer chemicals (1- pentanol, 1-heptanol, and 2-ethyl-1hexanol), in the bench-scale testing were removed from the test material soil with water flushing, suggesting very little adsorption to the soil at the Site. Bench-scale testing indicated ethanol effectively removed PCE at ethanol concentrations above 50% ethanol-in-water. |
