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Item Information   Holdings       More by this author     Thurman, Mary Joann     Subjects     Remediation wells.     Natural attenuation.     Volatile organic compounds -- Biodegredation.     Groundwater -- Pollution.     MSEV Project.     Browse Catalog     by author:      Thurman, Mary Joann       by title:      Monitored natural at...         MARC Display

Monitored natural attenuation of chlorinated solvents / by Mary Joann Thurman. by Thurman, Mary Joann Subjects Remediation wells.   Natural attenuation.   Volatile organic compounds -- Biodegredation.   Groundwater -- Pollution.   MSEV Project. Description:  Various pagination : ill. ; 29 cm. Contents:  Advisor: Paul Boersma Committee members: Dr. Carol Diggelman, Dr. Francis Mahuta Site conceptual model - Hato Rey, Puerto Rico -- Natural attenuation process/Science -- Regulatory acceptance and protocols for monitored natural attenuation -- Risk-based corrective action for chlorinated release -- Evaluation of natural attenuation system at the site -- Cost comparison -- Conclusion. Chlorinated solvent contamination was identified in the groundwater during a divestiture investigation at a former Allen-Bradley Company manufacturing site in Hato Rey, Puerto Rico. Currently, the site is operating under an approved Remediation Action Plan with the Puerto Rico Environmental Quality Board to clean up the site with a traditional pump-and-treat system. The system has been installed and began operation in January 1999. Due to the limitations of the treatment and the long time frame associated with pump-and-treat technology, alternative remediation approaches were investigated. This project focused on the investigation of Monitored Natural Attenuation (MNA) as an alternative remediation approach. Capstone objectives are: 1) Analyze the potential for monitored natural attenuation to achieve the site-specific risk-based clean up goals for 1,1,1-Trichloroethane (TCA) and 1,1-Dichloroethene(1,1-DCE). One expected degradation pathway for TCA is: TCA ..... 1,1-DCE........Vinyl Chloride.....CO2. 2) Compare the cost difference between Monitored Natural Attenuation and Traditional Pump-and-treat remediation strategies. Capstone Conclusions are: Monitored natural attenuation is a technically feasible and cost effective remediation strategy for the Hato Rey, Puerto Rico site. 1) 1,1,1-Trichloroethane and its daughter products had reduced in mass and concentration prior to and as a result of active pump-and-treat remediation. 2) Detailed analyses and groundwater chemistry show that attenuation is occurring in the uppermost aquifer and is an effective remedial measure for impacted groundwater. 3) Transport modeling show the nearest receptor cannot be impacted in the future. Proposed risk-based cleanup goals are protective. 4) Over the life of the project, monitored natural attenuation will potentially reduce the cost of remediation by $450,000.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .T48 2001 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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