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Aquifer susceptibility to perchlorate contamination in a highly urbanized environment

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Edited by: Michael G. Trefly

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Abstract

Perchlorate contamination from anthropogenic sources has been released into the Rialto-Colton, California, USA, groundwater flow system since the 1940s during its production, distribution, storage, and use. Preliminary analysis of lithological, geophysical, and water-chemistry data provided new understanding of the pathways of perchlorate migration that aid in assessing the susceptibility of drinking-water supplies to contamination within the Rialto-Colton basin. Vertical migration of perchlorate into the main water-producing aquifers is restricted by an areally extensive old soil surface; however, perchlorate data indicate contamination below this soil surface. Possible pathways for the downward migration of the contaminated water include wellbore flow and discontinuities in the old soil surface. Horizontal migration of perchlorate is influenced by lithology and faults within the basin. The basin fill is a heterogeneous mixture of boulders, gravel, sand, silt, and clay, and internal faults may restrict perchlorate migration in some areas.

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Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Aquifer susceptibility to perchlorate contamination in a highly urbanized environment
Volume 324
Year Published 2007
Language English
Publisher International Association of Hydrological Sciences
Contributing office(s) California Water Science Center
Description 7 p.
Larger Work Type Conference Paper
Larger Work Title Groundwater quality: securing groundwater quality in urban and industrial environments : GQ 07
First page 156
Last page 163
Conference Title 6th International Groundwater Quality Conference
Conference Location Fremantle, Australia
Conference Date December 2-7 2007
Country United States
State California
Online Only (Y/N) N
Additional Online Files (Y/N) N