methodology for aquatic ecological risk assessment

... least as much care 2.1 RISK MANAGERS AND RISK ASSESSORS The primary purpose of performing ecological risk assessments for contaminatedsites is to provide information needed for a decision concerning ... the risk manager may provide input prior to the problem formulation Thisoption is suggested by the EPA framework for ecological risk assessment, whichshows the risk manager outside the problem formulation ... with the riskmanager into an operational plan for performing the assessment Risk assessors must be aware that not all representatives of agencies with riskmanagement responsibilities are risk managers

Ngày tải lên: 11/08/2014, 04:20

... useful for screening ments, but the dissolved form is appropriate for definitive risk assessments of aquaticbiota for two reasons First, the form in the exposure assessment should match theform ... useful forscoping and screening assessments but are unlikely to be acceptable for definitiveassessments Two different expressions of sediment contamination are commonly used inecological risk assessments: ... estimaterisks, but also present results for total concentrations to satisfy the state and regionalregulators The total metal analyses were performed in any case for the assessment of risks from

Ngày tải lên: 11/08/2014, 04:20

... appropriate or adequate for risk assessment?Have the appropriate studies been done at the right stage of risk assessment?Has sufficient account been taken of the necessity for assessment of Have the ... should not be used for risk assessment due to difficulties in establishing their ecological relevance These endpoints are considered more rel- evant for mechanistic studies or hazard assessment.What ... a risk assessment is conducted for aquatic macrophytes, in order to assess whether suffi- cient and appropriate information is available.Are the exposure scenarios relevant to the effects assessments?Can

Ngày tải lên: 03/09/2025, 23:44

... Management Decision/Risk Assessment Link in Ecological Risk Assessment Paradigms, Frameworks, Guidance 38 Evolution of the Management Decision/Risk Assessment Link in Regional-Scale Assessments 41 ... between the regional (ecological) risk assessment (RRA) process and the decisions these assessments inform This link has enabled changes in: (1) how RRAs (and ecological risk assessments [EcoRAs]) ... between risk assessment and management decisions (USEPA 1997) Further supporting this linkage, EPA subsequently published the Ecological Risk Assessment and Risk Management Principles for Superfund

Ngày tải lên: 11/08/2014, 20:21

... contribution of risk from sources, risk in habitats,and risk to assessment endpoints can be calculated in a region The ultimate differ-ence between an RRM risk assessment and traditional risk assessments ... Recent trends in ecological risk assessment have shifted toward assessing risk from multiple stressors at a regional scale (Cook et al 1999; Cormier et al 2000) Such regional-scale risk assessments ... risk in subregions, relative contribution of risk from sources, risk in habitat types, and assessment endpoints most at risk within the CP area Finally, we used Monte Carlo techniques to perform

Ngày tải lên: 11/08/2014, 20:21

... Ecological Risk Assessment and the Guidelines for Ecological Risk Assessment He continues to support the development of improved methods for ecological risk assessment as the Hazard=Risk Assessment ... Guidelines for Ecological Risk Assessment, the 1993 Wild-life Exposure Factors Handbook, and the 1992 Framework for Ecological Risk Assessment She has published numerous articles on ecological assessment ... books including Ecological Model-ing in Risk Assessment (2001), Ecological Risk Assessment Deci-sion-Support System: A Conceptual Design (1998), Risk Assessment and Management Handbook for Envir-onmental,

Ngày tải lên: 12/08/2014, 00:21

... conceptual model for ecological risk assessment should be consistent with other conceptual models developed for assessments to inform the same decision There will always be a human health risk model ... historic information may have been developed for permitting or other regulatory purposes, for resource management, for research, for a monitoring program, for environmental impact assessments, or for ... REFERENCE INFORMATION When performing a risk assessment for a site or region, information concerning the baseline state or a nominally uncontaminated or undisturbed state is needed for purposes

Ngày tải lên: 12/08/2014, 00:21

... particularcircumstances For example, the term infective dose (IDp) is used for tests of pathogens Forsimplicity, ECp may be used for all of these values In human health risk assessment and some wildlife risk assessments, ... go od for comparin galte rnative functi ons an d calcul ating co nfidenc e bounds (http: == www.epa gov =nc ea =for human health risk asses sments, it is also useful for eco logical risk assessment ... important for ecologi cal risk assessment For regula tory standar ds or screenin g bench marks , it is de sirable to define points on theexposure dist ribution that are thres holds for signifi

Ngày tải lên: 12/08/2014, 00:21

... metrics for the site The actual characterizationfor ecological risk assessment is then performed by weight of evidence (Suter 1993a; EPA1998a) Rather than simply running a risk model, ecological risk ... risks with a single category, nontrivialrisks In that case, the nontrivial risks are carried forward to subsequent assessments Screening ecologi cal risk assessment s have a num ber of potenti ... whichmay cause risks to wide-ranging wildlife populations 31.2.6 DATAADEQUACY ANDUNCERTAINTIES Screening ecological risk assessments performed at the intermediate stages of a phasedassessment process

Ngày tải lên: 12/08/2014, 00:21

... Communicating35.1 REPORTING ECOLOGICAL RISKS The form in which ecological risks are reported is an oft-neglected aspect of the practice ofecological risk assessment The EPA’s guidance for risk characterization ... Trang 1Part VIRisk Management Risk characterization serves to inform risk management At minimum, ecological risk sors must report the results of their risk characterization to the risk manager ... advocated more complete risk charac-terizations including multiple alternative risk estimates (Gray 1994) For ecological riskassessments, this means reporting not only risk estimates for all lines of

Ngày tải lên: 12/08/2014, 00:21

... Generic Ecological Assessment Endpoints(GEAEs) for Ecological Risk Assessment EPA=630=P-02=004B Risk Assessment Forum,Washington, DC EPA (US Environmental Protection Agency) 2003d Methodology for ... microbial toxicity tests in ecologicalrisk assessment Hum Ecol Risk Assess., 5:715–727 Efroymson, R.A and Suter, G.W., II 2001a Ecological risk assessment framework for altitude aircraft overflights ... (LD50) in avian risk assessment No 216 Canadian WildlifeService, Hull, PQ, Canada Trang 18Barnthouse, L.W 1996 Guide for developing data quality objectives for ecological risk assessment atDOE

Ngày tải lên: 12/08/2014, 00:21

... Human Health and Ecological Risk Assessment and Risk Management 1 Trang 2Course Coordinator : Khunying Mathuros Ruchirawat Objectives: Give an introduction to the assessment of risk of chemicals ... newest concepts in the evaluation of risks Format: Lectures including case studies, and risk assessment exercise, special feature Presentation of IPCS/WHO Risk Assessment Toolkit Teaching material: ... communication4 Trang 5RISK ASSESSMENT EXERCISETrang 6Friday, December 16 Presentation of Risk Assessment Exercise – 30 min each group, allow 5 min for questioning and discussion Examination for graduate

Ngày tải lên: 15/04/2015, 09:20

... Anguiliformes Anguiliformes Atheriniformes Atheriniformes Atheriniformes Atheriniformes Gasterosteiformes Gasterosteiformes Perciformes Mean Weighted mean Y Variable Perciformes Tetraodontiformes ... Salmoniformes Salmoniformes Salmoniformes Cypriniformes Cypriniformes Taxonomic Extrapolation: Orders within Classes Cypriniformes 225 Siluriformes 203 Perciformes 443 Siluriformes 111 Perciformes ... Perciformes Tetraodontiformes Perciformes Gasterosteiformes Atheriniformes Cypriniformes Tetraodontiformes Perciformes Gasterosteiformes Tetraodontiformes Perciformes Tetraodontiformes n 190 12 34 46 46...

Ngày tải lên: 11/08/2014, 04:20

... REPORTING ECOLOGICAL RISKS The form in which ecological risks are reported is an often neglected aspect of the practice of ecological risk assessment The EPA internal guidance for risk characterization ... as individuals, most risk management decisions for wildlife are based on population-level effects Therefore, for the results of the risk characterization to be of use for risk management, extrapolations ... should be repeated for each new assessment Methods for screening assessments are presented in Chapter The results of the screening assessment should be presented in the definitive assessment as a...

Ngày tải lên: 11/08/2014, 04:20

... necessary to use an ecological risk assessment framework that has been developed for multiple activities The standard ecological risk assessment framework was developed for assessments of individual ... acceptable health and ecological risks would result from remedial decisions It provided a formal methodology for organizing the results of the risk assessment so that the risks that must be balanced ... Risk to an ecological component of a site that has extraordinary local value Intermediate ecological risk • Ecological risk of magnitude between de minimis and de manifestis risk De minimis ecological...

Ngày tải lên: 11/08/2014, 04:20

... LAND USE Land-use scenarios play a different role in ecological risk assessments than they in human health risk assessments For human health risk assessments, remediation depends on the land-use ... piscivores may not forage The PRG for a particular chemical cannot be assumed to protect piscivorous wildlife if information on the toxicity is not available As in the risk assessment for aquatic organisms, ... based on ecological risk or even what level of protection is analogous to the 10-6 risk for human carcinogens (See Section 9.2.3 for a discussion of balancing health and ecological risks.) PRGs...

Ngày tải lên: 11/08/2014, 04:20

... as tiered assessments with increasingly rigorous analysis NRDAs might benefit from the logic of the ecological risk framework and from the ability to adopt risk assessments performed for the remedial ... adjunct to risk assessment, NRDA and ecological risk assessment practices may converge The NRDA process is particularly problematical for federal agencies that have contaminated sites for which ... is likely to be needed for spills or CERCLA emergency actions, but is unlikely to be needed for typical CERCLA NRDAs Where an RI/FS has been performed, the ecological risk assessments in those...

Ngày tải lên: 11/08/2014, 04:20

... W Suter II (Ed.), Ecological Risk Assessment Lewis Publishers, Boca Raton, FL 247–274 Barnthouse, L W 1996 Guide for Developing Data Quality Objectives for Ecological Risk Assessment at DOE Oak ... Agency) 1992a Framework for Ecological Risk Assessment EPA/630/R-92/001 Risk Assessment Forum, Washington, D.C EPA (U.S Environmental Protection Agency) 1992b Dermal Exposure Assessment: Principles ... 2:627–1037 Callahan, C A and B D Steele 1998 Ecological risk assessment guidance for Superfund sites In A de Peyster and K E Day (Eds.), Ecological Risk Assessment: A Meeting of Policy and Science...

Ngày tải lên: 11/08/2014, 04:20

... regional relative risk assessment FRAMEWORK OF THE RELATIVE RISK MODEL The framework for the RRM for regional risk assessment was outlined by Landis and Wiegers (1997) Ecological risk assessment (EcoRA) ... AM 18 REGIONAL SCALE ECOLOGICAL RISK ASSESSMENT The first four steps are critical to performing a regional ecological risk assessment and are the foundation of a useful risk assessment that can ... INTRODUCTION TO THE REGIONAL RISK ASSESSMENT Ecological Risk Assessment Framework Decision Maker Ten Steps Problem Formulation 1,2,3,4 Verification Analysis 17 Risk Characterization Risk Communication...

Ngày tải lên: 11/08/2014, 20:21

... 1998 Guidelines for Ecological Risk Assessment, EPA/630/R-95/002F, Risk Assessment Forum, Washington, D.C U.S Environmental Protection Agency 2003 Framework for Cumulative Risk Assessment, EPA/600/P-02/001F, ... REGIONAL SCALE ECOLOGICAL RISK ASSESSMENT Results of the Problem Formulation: Conceptual Model Information gathered during the problem formulation phase provided the foundation for constructing ... 2004 2:45 PM 54 REGIONAL SCALE ECOLOGICAL RISK ASSESSMENT Relative Risk Model as a Tool for Risk Assessors and Resource Managers 86 Limitations of Relative Risk Models 87 Conclusions...

Ngày tải lên: 11/08/2014, 20:21