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Services Provided
ü Site Characterization, RFI
ü Fate-and-Transport Modeling
ü Risk Assessment
ü Feasibility, Corrective Measure Study
Technologies Used
ü Computer Expert System Software
Relevance
ü Groundwater, Soil
ü Hazardous
ü Commercial Client
ü AutoCAD
Accomplishments
ü Rapid response to accommodate
customer's demanding schedule
ü Quality services under tight budget
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Title: Site Characterization, Environmental Risk Assessment, and Corrective Measure Study
Client: Resolution Trust Corporation
Dallas, Texas
The objective of this project was to evaluate an abandoned quarry that had been filled with a variety of wastes, totaling
approximately 48,000 cubic yards, and determine the appropriate remedial response to attain closure of the site under the Texas Risk Reduction Standards. Site
characterization consisted of site reconnaissance, geophysical magnetic survey, soil sampling, and monitoring wells installation. All investigative activities
were performed using level D personal protection equipment and in accordance with a Health and Safety Plan prepared prior to the commencement of the field activities.
Following site characterization, a baseline risk assessment, including fate and transport modeling, was accomplished to identify the likely pathways of contaminant exposure and
evaluate the current and projected future conditions caused by the migration of contaminants. The primary contaminant
of concern was found to be barium; however, the fate and transport modeling forecast that there was little potential risk of barium migrating down to the level of the Twin Mountains
aquifer. Based on the results of risk assessment, a comprehensive corrective measure study involving remedial alternative development and screening was completed. The alternative
recommended consisted of a Risk Reduction Standard 2 closure with institutional controls and continued groundwater monitoring.
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