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Derivation of soil screening thresholds to protect chisel-toothed kangaroo rat from uranium mine waste in northern Arizona

Archives of Environmental Contamination and Toxicology

By:
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DOI: 10.1007/s00244-013-9893-5

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Abstract

Chemical data from soil and weathered waste material samples collected from five uranium mines north of the Grand Canyon (three reclaimed, one mined but not reclaimed, and one never mined) were used in a screening-level risk analysis for the Arizona chisel-toothed kangaroo rat (Dipodomys microps leucotis); risks from radiation exposure were not evaluated. Dietary toxicity reference values were used to estimate soil-screening thresholds presenting risk to kangaroo rats. Sensitivity analyses indicated that body weight critically affected outcomes of exposed-dose calculations; juvenile kangaroo rats were more sensitive to the inorganic constituent toxicities than adult kangaroo rats. Species-specific soil-screening thresholds were derived for arsenic (137 mg/kg), cadmium (16 mg/kg), copper (1,461 mg/kg), lead (1,143 mg/kg), nickel (771 mg/kg), thallium (1.3 mg/kg), uranium (1,513 mg/kg), and zinc (731 mg/kg) using toxicity reference values that incorporate expected chronic field exposures. Inorganic contaminants in soils within and near the mine areas generally posed minimal risk to kangaroo rats. Most exceedances of soil thresholds were for arsenic and thallium and were associated with weathered mine wastes.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Derivation of soil screening thresholds to protect chisel-toothed kangaroo rat from uranium mine waste in northern Arizona
Series title:
Archives of Environmental Contamination and Toxicology
DOI:
10.1007/s00244-013-9893-5
Volume
65
Issue:
2
Year Published:
2013
Language:
English
Publisher:
Springer
Contributing office(s):
Columbia Environmental Research Center
Description:
13 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Archives of Environmental Contamination and Toxicology
First page:
332
Last page:
344
Number of Pages:
13
Country:
United States
State:
Arizona
Other Geospatial:
Kanab South Pipe;Kanab North Mine;Pigeon Mine;Hermit Mine;Hack Canyon Mine Complex