Ecological Risk Assessment for Contaminated Sites - Chapter 3 potx

... cm: 0 .33 0–60 cm: 0 .30 Shariatpanahi and Anderson, 1986 Soils east of Rocky Flats, CO Pu- 239 and Pu-240 0 3 cm: 11655 0–6 cm: 10101 0–9 cm: 8498 0–12 cm: 7095 0–18 cm: 5001 0–24 cm: 38 06 0 36 ... model accumu- lation mechanistically. Mechanistic models are developed based on knowledge of FIGURE 3. 3 Scatter plots of untransformed (A) and log-transformed (B) bioaccumula- tion data...

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... 148 25 33 Atheriniformes Gasterosteiformes 36 20 27 Gasterosteiformes Tetraodontiformes 8 20 30 Gasterosteiformes Perciformes 33 32 43 Perciformes Tetraodontiformes 34 25 34 Mean 23. 5 31 .7 Weighted ... Classes Salmoniformes Cypriniformes 225 20 27 Salmoniformes Siluriformes 2 03 39 51 Salmoniformes Perciformes 4 43 12 16 Cypriniformes Siluriformes 111 11 15 Cypriniformes Perci...

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... BOX 2 .3 Criteria for Selection of Assessment Endpoints for Ecological Risk Assessments 1. Policy goals and societal values — Because the risks to the assessment endpoint are the basis for ... primary purpose of performing ecological risk assessments for contaminated sites is to provide information needed for a decision concerning remediation. There- fore, th...

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... applied to dioxin-like compounds. Generation of 7-ethoxyre- sorufin- o -deethylase (EROD) in rat hepatoma cell cultures has been used as a bioassay for 2 ,3, 7,8-TCDD-equivalents (TCDD-EQs) in the ... as individuals, most risk manage- ment decisions for wildlife are based on population-level effects. Therefore, for the results of the risk characterization to be of use for risk...

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... multiple contami- nated sites require remediation. The process of prioritizing these sites should incor- porate principles of ecological risk assessment. For example, if all sites cannot be remediated ... necessary to use an ecological risk assessment framework that has been developed for multiple activities. The standard ecological risk assessment framework was dev...

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... PRGs 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.) ... play a different role in ecological risk assessments than they do in human health risk assessments. For human health risk assessments, remediation depends on the lan...

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... 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 ... expensive. 10.2 .3 A SSESSMENT P HASE The assessment phase is equivalent to the analyses of exposure and effects and the risk characterization in a conventional...

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... Framework for Ecological Risk Assess- ment. EPA/ 630 /R-92/001. Risk Assessment Forum, Washington, D.C. EPA (U.S. Environmental Protection Agency). 1992b. Dermal Exposure Assessment: Princi- ples ... Ground-living invertebrates in metal-polluted forest soils. Ambio 13( 1):29 33 . Bergman, H. L. and E. J. Dorward-King, Eds. 1997. Reassessment of Metals Criteria for Aquati...

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... À0.05 6 .33 202 .32 G — 3. 00 0.87 0.60 0.18 3. 55 222 .38 H — 7.00 0.00 0.00 À1.00 5.76 450 I — 2.00 1. 43 0.94 À0.15 6. 53 159 .35 J — 3. 13 2. 03 1.07 À0.06 33 .29 165.58 K — 2.02 1.91 1.25 0.22 15 .31 10.98 L ... 0. 73 0.90 1.44 À0.19 35 28.27 276 .30 B 2 .38 3. 5 3. 44 4.01 0.20 34 24. 53 217. 43 C — 3. 9 2.40 1.52 0. 23 4.52 50.90 D — 2 .3 1.84 0.89 0 .39 1.95 220....

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... http://www.yosemite.epa.gov/R10/CLEANUP.NSF/9f3c2189 633 0b 4898825687b007a0f 33/ 3 431 933 4228615b088256516006cdccd/$FILE/Fort%20Rich %205%20Year.pdf. http://www.cfpub.epa.gov/ncea/cfm/recordisplay.cfm?deid= 237 60.html. 44 REGIONAL SCALE ECOLOGICAL ... Ecological Risk Assessment Guid- ance for Superfund: Process for Designing and Conducting Ecological Risk Assess- USEPA (...

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