Ecological Risk Assessment for Contaminated Sites - Chapter 7 doc

... 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 beremediated ... necessary to use an ecological risk assessment framework that has beendeveloped for multiple activities. The standard ecological risk assessment frameworkwas developed for assessments of individual ... “Guidelines for Ecological Risk Assessment is broad and includesphysical stressors, risks associated with CERCLA remediation are not a focus of thedocument (EPA, 1998). Nonetheless, the Ecological Risk...

... as much care. 2.1 RISK MANAGERS AND RISK ASSESSORS The primary purpose of performing ecological risk assessments for contaminated sites is to provide information needed for a decision concerning ... 2.3Criteria 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 decision ... it is not particular to ecological risk assessment. Ecological risk assessors need not know how to samplea well or perform a mass spectral analysis. Rather, ecological risk assessors mustunderstand...

... play a different role in ecological risk assessments than they doin human health risk assessments. For human health risk assessments, remediationdepends on the land-use scenario because land ... PRGsbased 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 healthand ecological risks.) ... developed for six speciespresent on the Oak Ridge Reservation: short-tailed shrew, white-footed mouse, redfox, white-tailed deer, American woodcock, and red-tailed hawk. For each chemical,the PRG for...

... (with shell) 74 6.1Shrimp 78 3.3Isopods, amphipods 71 –80Cladocerans 79 – 87 Aquatic vertebrates Bony fishes 75 5.1Pacific herring 68 3.9Aquatic plants Algae 84 4 .7 Aquatic macrophytes 87 3.1Emergent ... concern. In a retrospective risk assess-ment for a contaminated site, it is rarely necessary to model chemical transport andfate in soil. An exception is the risk assessment for a future scenario ... townsLead 0–5 cm: 1400 0–10 cm: 10800–15 cm: 77 0Sharma and Shupe, 1 977 Arsenic 0–5 cm: 6550–10 cm: 4890–15 cm: 351Sharma and Shupe, 1 977 Agricultural sites in Iran that are irrigated with...

... 12Atheriniformes Cypriniformes 7 501b 78 6bAtheriniformes Tetraodontiformes 46 13 17 Atheriniformes Perciformes 148 25 33Atheriniformes Gasterosteiformes 36 20 27 Gasterosteiformes Tetraodontiformes 8 20 ... below.Siluriformes Perciformes 190 63 83Anguiliformes Tetraodontiformes 12 13 18Anguiliformes Perciformes 34 25 34Anguiliformes Gasterosteiformes 8 16 24Anguiliformes Atheriniformes 46 9 12Atheriniformes ... in ecological risk assessments of contami-nated sites often develop standard ecotoxicity profiles (Sample et al., 1997b). Theseoff-the-shelf profiles are labor saving and also are useful for...

... applied to dioxin-like compounds. Generation of 7- ethoxyre-sorufin- o -deethylase (EROD) in rat hepatoma cell cultures has been used as abioassay 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 theresults of the risk characterization to be of use for risk management, extrapolationsfrom ... should berepeated for each new assessment. Methods for screening assessments are presentedin Chapter 5. The results of the screening assessment should be presented in thedefinitive assessment as...