See more from this Division: General Discipline Sessions
See more from this Session: Environmental Geoscience I - Natural Hazard Assessment, 3D Modeling, and Site Characterization
Abstract:
As a first step in our investigation from Ordot Dump, surface (runoff) leachate samples were collected to characterize the primary biological and chemical contaminants in leachate water emanating from the Ordot Dump and trace their respective movements down the watershed out into the ocean. The subsurface samples were also collected by lysimeter at 0.7-2.0 meter depths.
A time-series analysis of aqueous and soil samples with emphasis on solute transport through the soil was made in this part of the study. Lysimeters were used to extract interstitial waters from soil inundated by the leachate streams down gradient from the dump, and downstream in the Lonfit-Pago River system. Soil samples from adjacent to lysimeters and water samples from the streams surrounding the dump and the ocean water at the Pago Bay were obtained for these purposes.
Differential mobilization rates of primary contaminants were evaluated by comparing their surface and subsurface distributions and abundances. Finally, their potential impact on the receiving waters will be assessed from an ecological and public health standpoint in future studies. This paper will describe the methodology and the result of the investigation thus far.
Keywords: Soil charges, Contaminants Transport, Leachate, lysimeter, Landfills, Island of Guam
See more from this Division: General Discipline Sessions
See more from this Session: Environmental Geoscience I - Natural Hazard Assessment, 3D Modeling, and Site Characterization