Author: Publisher:
ISBN:
Category : Environmental toxicology
Languages : en
Pages : 410
Book Description
Application of Risk-based Screening Levels and Decision Making to Sites with Impacted Soil and Groundwater: Background documentation for the development of Tier 1 soil and groundwater screening levels
Author: Publisher:
ISBN:
Category : Environmental toxicology
Languages : en
Pages : 410
Book Description
Soil Screening Guidance
Author: Environmental Cleanup at Navy Facilities
Author: Committee on Environmental Remediation at Naval FacilitiesPublisher:
ISBN:
Category : History
Languages : en
Pages : 166
Book Description
The fiscal and technological limitations associated with cleaning up hazardous waste sites to background conditions have prompted responsible parties to turn to risk-based methods for environmental rememdiation. Environmental Cleanup at Navy Facilities reviews and critiques risk-based methods, including those developed by the U.S. Environmental Protection Agency and the American Society of Testing and Materials. These critiques lead to the identification of eleven criteria that must be part of any risk-based methodology adopted by the Navy, a responsible party with a large number of complex and heavily contaminated waste sites. January
California State Publications
Author: Publisher:
ISBN:
Category : State government publications
Languages : en
Pages : 80
Book Description
Provisional Guidance for Quantitative Risk Assessment of Polycyclic Aromatic Hydrocarbons
Author: Publisher:
ISBN:
Category : Health risk assessment
Languages : en
Pages : 28
Book Description
Contaminants in the Subsurface
Author: National Research CouncilPublisher: National Academies Press
ISBN: 030909447X
Category : Science
Languages : en
Pages : 371
Book Description
At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.
Health Effects Assessment Summary Tables
Author: Publisher:
ISBN:
Category : Health risk assessment
Languages : en
Pages : 414
Book Description
Bioavailability of Contaminants in Soils and Sediments
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309086256
Category : Technology & Engineering
Languages : en
Pages : 433
Book Description
Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
Cleanup Criteria for Contaminated Soil and Groundwater
Author: Toxicity Assessments of Antimony, Barium, Beryllium, and Manganese for Development of Ecological Soil Screening Levels (ECO-SSL) Using Earthworm (Eisenia Fetida) Benchmark Values
Author: Michael SiminiPublisher:
ISBN: 9781423515838
Category :
Languages : en
Pages : 76
Book Description
The U.S. Environmental Protection Agency (USEPA), in a collaborative effort with other Federal agencies, states, and private industry, is developing Ecological Soil Screening Levels (Eco-SSLs) for ecological risk assessment of contaminants at Superfund sites. Earthworm (Eisenia fetida) cocoon production and survival tests were conducted in a Sassafras sandy loam soil that supports relatively high bioavailability of barium (Ba), beryllium (Be), manganese (Mn), and antimony (Sb). For the metals tested, cocoon production was a more sensitive endpoint than was survival. Bounded Lowest Observed Effect Concentrations (LOECs) (mg kg-1) for cocoon production, as determined by analysis of variance (ANOVA), were 83, 86, 433, and 1236 for Be, Sb, Ba, and Mn, as compared to LOECs for survival of 110, 697, 1585, and 2222, respectively. Bounded No Observed Effect Concentrations (NOECs) (mg kg-1) for cocoon production, as determined by ANOVA, were 57, 60,258, and 1111 for Be, Sb, Ba, and Mn, as compared to NOECs for survival of 83, 617,1348, and 1444, respectively. Non-linear regression analysis of cocoon production data showed that the relative toxicity (EC20 mg kg-1) of the four metals was in the order of Sb (30) = Be (52) > Ba (370) > Mn ( 629). These results will be submitted to the Eco-SSL Work ou for review and inclusion in their database.