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Title: Comparison of models used for ecological risk assessment and human health risk assessment

Abstract

Models are used to derive action levels for site screening, or to estimate potential ecological or human health risks posed by potentially hazardous sites. At the Los Alamos National Laboratory (LANL), which is RCRA-regulated, the human-health screening action levels are based on hazardous constituents described in RCRA Subpart S and RESRAD-derived soil guidelines (based on 10 mRem/year) for radiological constituents. Also, an ecological risk screening model was developed for a former firing site, where the primary constituents include depleted uranium, beryllium and lead. Sites that fail the screening models are evaluated with site-specific human risk assessment (using RESRAD and other approaches) and a detailed ecological effect model (ECOTRAN). ECOTRAN is based on pharmacokinetics transport modeling within a multitrophic-level biological-growth dynamics model. ECOTRAN provides detailed temporal records of contaminant concentrations in biota, and annual averages of these body burdens are compared to equivalent site-specific runs of the RESRAD model. The results show that thoughtful interpretation of the results of these models must be applied before they can be used for evaluation of current risk posed by sites and the benefits of various remedial options. This presentation compares the concentrations of biological media in the RESRAD screening runs to the concentrations inmore » ecological endpoints predicted by the ecological screening model. The assumptions and limitations of these screening models and the decision process where these are screening models are applied are discussed.« less

Authors:
;  [1]
  1. Los Alamos National Lab., NM (United States)
Publication Date:
OSTI Identifier:
40172
Report Number(s):
CONF-9410273-
TRN: IM9520%%367
Resource Type:
Conference
Resource Relation:
Conference: 15. annual meeting of the Society of Environmental Toxicology and Chemistry (SETAC), Denver, CO (United States), 30 Oct - 3 Nov 1994; Other Information: PBD: 1994; Related Information: Is Part Of Society of Environmental Toxicology and Chemistry 15th annual meeting: Abstract book. Ecological risk: Science, policy, law, and perception; PB: 286 p.
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; LANL; ENVIRONMENTAL IMPACTS; DEPLETED URANIUM; HEALTH HAZARDS; BERYLLIUM; LEAD; MATHEMATICAL MODELS; ENVIRONMENTAL TRANSPORT; RESOURCE RECOVERY ACTS; R CODES; E CODES

Citation Formats

Ryti, R T, and Gallegos, A F. Comparison of models used for ecological risk assessment and human health risk assessment. United States: N. p., 1994. Web.
Ryti, R T, & Gallegos, A F. Comparison of models used for ecological risk assessment and human health risk assessment. United States.
Ryti, R T, and Gallegos, A F. Sat . "Comparison of models used for ecological risk assessment and human health risk assessment". United States.
@article{osti_40172,
title = {Comparison of models used for ecological risk assessment and human health risk assessment},
author = {Ryti, R T and Gallegos, A F},
abstractNote = {Models are used to derive action levels for site screening, or to estimate potential ecological or human health risks posed by potentially hazardous sites. At the Los Alamos National Laboratory (LANL), which is RCRA-regulated, the human-health screening action levels are based on hazardous constituents described in RCRA Subpart S and RESRAD-derived soil guidelines (based on 10 mRem/year) for radiological constituents. Also, an ecological risk screening model was developed for a former firing site, where the primary constituents include depleted uranium, beryllium and lead. Sites that fail the screening models are evaluated with site-specific human risk assessment (using RESRAD and other approaches) and a detailed ecological effect model (ECOTRAN). ECOTRAN is based on pharmacokinetics transport modeling within a multitrophic-level biological-growth dynamics model. ECOTRAN provides detailed temporal records of contaminant concentrations in biota, and annual averages of these body burdens are compared to equivalent site-specific runs of the RESRAD model. The results show that thoughtful interpretation of the results of these models must be applied before they can be used for evaluation of current risk posed by sites and the benefits of various remedial options. This presentation compares the concentrations of biological media in the RESRAD screening runs to the concentrations in ecological endpoints predicted by the ecological screening model. The assumptions and limitations of these screening models and the decision process where these are screening models are applied are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}

Conference:
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