Abstract of Thesis Presented to the Graduate School
 of the University of Florida in Partial Fulfillment of the
 Requirements for the Degree of Master of Science

 USING MULTILEVEL SAMPLERS TO ASSESS ETHANOL FLUSHING
 AND ENHANCED BIOREMEDIATION AT FORMER SAGES DRYCLEANERS

 By

 Gordon Hitchings Brown

 August 2006


Chair: Michael D. Annable
Cochair: James W. Jawitz
Major Department: Environmental Engineering Sciences

 As a result of dry cleaning operations, there are hundreds of sites where the subsurface

aquifer has been contaminated by perchloroethylene (PCE), the dry cleaning agent. One of the

more challenging problems facing environmental scientists and engineers today is locating PCE

source areas and cleaning up these sites to reduce the risk of contaminated groundwater reaching

water supplies. The high specific gravity, low solubility, and recalcitrance make PCE highly

persistent in the environment. Without some remedial action, many of these sites would serve as

a source of dissolved groundwater contamination for decades. The Sages former drycleaning site

in Jacksonville, FL, was the test ground for a pilot scale in-situ alcohol flushing test in 1998.

The sandy aquifer was contaminated with PCE, found as a separate phase in discrete layers in the

sub surface.

 A network of multilevel sampling wells (MLS) was installed in the source area to collect

liquid samples before, during and for six years after the pilot test. The depth level sampling of

MLS allows three dimensional spatial analyses. Multilevel samples were able to determine the

initial and post-remedial PCE architecture at the site. This information will help the site manager