Environmental receptor

Collecting and analyzing existing data. Existing data (Table 16.1) are collected and analyzed to develop a conceptual site model that can be used to assess both the nature and the extent of contamination and to identify potential exposure pathways and potential human health or environmental receptors. 

Data from chemical characterization were used to estimate possible adverse effects on humans and the environmental receptors. Following previously published works [11, 19], a hypothetic scenario was set up to assess the risk posed by these non-conventional matrix an accidental leachate release into ground-water resulting in 1 100 and 1 1,000 dilutions of the leachate compounds, which have been subjected to dilution as the leachate mixes with the groundwater (Fig. 3). 

Where on-site personnel (including contractors and visitors), critical equipment, the surrounding public, and sensitive environmental receptors are located with respect to hazardous materials and processes... 

Estimating distances. For both the worst-case and alternative release scenarios, the source must estimate the distance to where the endpoint is no longer exceeded and estimate the population (rounded to two significant digits) within a circle defined by the distance and centered at the release point. U.S. Census data may be used and it does not have to be updated however, the presence of sensitive populations (e.g. hospitals, schools, etc.) must be noted. In addition, the source must identify and list the types of environmental receptors within the calculated worst-case distance and circle however,... 

Finding 3. Closure of any chemical agent disposal facility necessitates the identification of potential exposure pathways and environmental receptors in an initial conceptual site model. Closure of JACADS has been complicated because this was not done early and the end use will not be determined until much of the closure planning has been completed. 

Industry sites are not the only sources of Iiazards dius die proximity of hazards to people and other sensitive environmental receptors should be e.xamined... 

A key component in the initial site assessment is the identification of human and environmental receptors potentially impacted by the site. An exposure pathway analysis relies on transport information to identify receptor or exposure points. For example, potentially significant transport and exposure pathways may include groundwater transport, vapor migration into buildings or utilities, etc. Current and potential future land use is identified as well as the potential for future installation of groundwater drinking water wells. If surface water has been impacted by the release, then appropriate surface-water exposure pathways will be identified. 

MEPAS uses mathematical algorithms and a coupled pathways analysis to predict the potential for contaminant migration from a waste site to important environmental receptors. Groundwater, overland, surface water (e.g., rivers and wetlands), and atmospheric pathways are considered. Using the contaminant transport predictions, computed... 

DPM considers both human and environmental receptors, though the human receptors are more highly weighted. The environmental receptors include both aquatic and terre.strial populations as appropriate. 

The current EPA standard does not require an estimation of the number of persons that might be injured, the types or severity of injuries, the areas of environmental receptors that might be damaged, or the types or severity of damage that might result from a release of hazardous material. 

Targeted Risk Drivers. Based on the analysis of principal risk drivers, site assessment and remediation efforts can be focused on the principal risk driver(s) with the largest contribution to risk across the portfolio of sites. In this manner, limited resources can be leveraged to achieve maximum risk reduction. Again, in all cases, priority is given to control of unsafe exposures for human or environmental receptors. 

The resrrlting consequences of an environmental impact are the identification of the environmental receptors that may be affected, and could also include the additional costs of ... 

Hydrochloric add (32% aqneons solntion) is not shipped near areas of high-popnlation density or near ary significant environmental receptors. 

Sensitive receptors along the route The location of people, property, and other environmental receptors along the route, as well as their distance, enables the development of the potential impacts (fatality, injury, economic, environmental). 

As such, for a logistic-spectral analysis, based on the molecular M-data for A-chemical species and toxicity activities of Table 3, the next steps are considered in producing the chemical-biological progress curves according to which chemical species dissolve in biological/environmental receptors. 

The offsite consequence analysis requires that the facility determine (1) the worst-case consequence distance, where all of the chemical is released under an F atmospheric stability condition and a wind speed of 1.5 m/s (meters per second) and (2) alternative release scenarios. This is done for each chemical. The worst-case and alternative release scenarios require that the toxic plume from the hypothetical spill be modeled to a toxic endpoint (in mg/m ) and the downwind distance to that endpoint be determined. The facility must also identify offsite receptors within the circle defined by the worst case and alternative release scenarios. Offsite receptors include public receptors (list population within circle, identify schools, commercial or industrial areas, etc.) and environmental receptors (wUdUfe sanctuaries, preserves, national forests, state parks, etc.). The facility does not need to consider the consequence of a toxic plume on the offsite receptors, only identify them. 

Some tertiary containment assessments have considered the environmental receptors surrounding the installation and potential pathways for pollution flows. However, many concentrated solely on assessing the maximum practical use of installed containment capacity, and determining the consequent fire-fighting attack duration. Buncefield showed that consequences might be much more extensive than expected. 

Sulfur isotope compositions are employed to assess the effect of industrial activities in pristine environments, particularly in regions where the pollutant sulfur has a distinct d S value compared to that of the environmental receptors. For example, in the province of Alberta, Canada, emissions from sour gas processing plants have d S values 201 higher compared to sulfur isotope compositions of unaffected soils. The distinct isotope composition of the anthropogenic sulfur allows it to be followed as it enters the environment via biogeochemical reactions. 

Environmental receptor a limited number of natural areas that are officially designated by the state or federal government. 

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