Exposure Assessment Sample Clauses

Exposure Assessment. An exposure assessment evaluates how much of a specific substance a receptor may ingest, inhale, or absorb through the skin over a specified time period. This section describes the potential receptors and exposure pathways selected for quantitative risk characterization. Exposure assumptions (or factors), equations used to estimate doses for the selected receptors, and methods used to derive exposure point concentrations (EPCs) are also described. The methodology for exposure point concentrations utilized in this risk assessment applies to both current and future land use. For purposes of this risk assessment, both current and future land use are described by the exposure parameters chosen in the following sections.
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Exposure Assessment. Exposure assessment describes the exposure pathway or pathways for a chemical hazard and estimates total intake. For some chemicals, intake may be associated with a single food. For others the residue may be present in multiple foods, as well as in drinking water, and sometimes in household products, such that food accounts for only a portion of total exposure. For chemicals, exposure assessment often uses values at certain points on the continuum of exposure, such as the mean. Such point estimates are referred to as deterministic models. Some exposure models are emerging, such as for intake of pesticide residues, that takes into account the distribution of food consumption by a population. These models, generally called probabilistic, provide more details on the distribution of exposed consumers, but are not inherently more accurate than deterministic models. If the level of exposure as determined by the exposure assessment is lower than the ADI or TDI, the chemical in foods is within safe limits.
Sample 1
Exposure Assessment. A food-chain exposure pathway model up to the point of consumption is developed for the hazard so that a human dose-response curve can be used to generate estimates of risk (Fig. 7.3). 4 Note that many natural toxins such as mycotoxins and marine toxins need insight into biology as well as chemistry for their risk assessment. 60 Farm Xxxxxxxxx and dressing Processing Retail Home Risk Assessment
Sample 1
Exposure Assessment. The exposure indicators must be representative of the population’s average exposure to air pollution. Therefore, a discussion with the people in charge of the measuring network in the city can help select the relevant monitoring stations. The hourly or daily data collected for each station must be averaged to give an estimate of global pollution. The indicator should be as close as possible to the one used in the epidemiological studies from which the CRFs are derived. Rarely are series of data complete, i.e., without any missing values. To substitute missing values we propose a method that works using the available data. . Finally, when performing an HIA simultaneously on different cities, the indicators should be calculated using the same protocol for all cities to be able to add the results for each city together and to compare results between cities.
Sample 1
Exposure Assessment. Task 2.1 will identify potential climate change effects on the Marin coast, using OCOF outputs to integrate wind, wave and surge conditions into an exposure assessment, including factors such as water levels, wave heights, flooding, and erosion. Specific OCOF assets that will be used include a seamless Digital Elevation Model derived from recent LIDAR and multibeam bathymetry, a suite of 40 dynamic coastal flooding projections in 25cm increments with four storm scenarios ranging from daily to 100-year return levels. OCOF’s interactive maps overlays and a user-friendly interface will be used to help convey the results to promote public understanding. Additionally, we will share our experience with the Coastal Storm Modeling System (CoSMoS) models used in the OCOF tool to assist those who are applying these models in other areas throughout the state. The Exposure Assessment will also explicitly address three additional aspects of sea level rise risk:
Sample 1
Exposure Assessment. 1. Dietary exposure from food and feed uses. In evaluating dietary exposure to triflusulfuron-methyl, EPA considered exposure under the petitioned-for tolerances as well as all existing triflusulfuron-methyl tolerances in 40 CFR 180.492. EPA assessed dietary exposures from triflusulfuron-methyl in food as follows:
Sample 1
Exposure Assessment. DDE in Maternal and Cord Blood Maternal blood was collected three times during pregnancy: at enrollment (M1); 32 weeks of pregnancy (M2); and, at delivery (M3). At the time of birth, an additional blood sample (C) was taken from the umbilical cord vein. Maternal whole blood and whole cord blood was centrifuged and plasma was separated form red blood cells for analysis. Full specimen data collection has been described in previous publications on this cohort (55). Maternal blood from each of the three collection time points during pregnancy and infant cord blood were analyzed for 4 specific isomers of organochloride compounds: p,p, DDT, o, p, DDT, p, p, DDD , p, p, DDE, and p, p, DDT. For this study, the outcome of interest is p, p DDE. DDE concentration was measured in plasma ng/mL. All exposure distributions for DDE measured at 4 time points (C, M1, M2 and M3) were right skewed and so were log10 transformed before being used in the analysis.
Sample 1
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Exposure Assessment. The EPA’s Wildlife Exposure Factors Handbook (EPA, 1993) was the primary source of exposure factors data. Table 24 lists the factors used for each receptor and the source of the data provided. BSAFs and BAFs used in the RI were reevaluated along with new values and final values are presented in Table 25. Bioaccumulation regression models from oak ridge national labatory (ORNL) and the ecological soil screening levels (EcoSSLs), which are available in Table 26, were used as appropriate. Other factors were reevaluated or refined as specified in Step 3 of the XXXX process under CERCLA. The exposure to upper trophic level organisms was assessed by quantifying the daily dose of ingested contaminated food items (that is, plant and animal) and ingested media. Exposure to receptors was estimated using chemical-specific Exposure Point Concentrations (EPCs), bioaccumulation data, and several other factors such as species-specific body weights, ingestion rates, home range data, and area use factors. Prey tissue concentrations were estimated using chemical-specific bioaccumulation factors and bioaccumulation regression models. Site-specific tissue data were not available. Instead, tissue concentrations were modeled using literature data. Benthic invertebrates were evaluated for direct toxicity to COPECs in sediment. EPCs were compared directly to media screening levels. Fish tissue concentrations used in modeling ingestion by piscivorous birds were modeled using biota sediment accumulation factors. It was assumed that the fish from which these BSAFs were developed were from the same trophic level as those expected in the diets of piscivorous birds feeding adjacent to the Site. Initial EPCs were established as maximum detected concentrations. 95% UCLs were only calculated for those COPECs for which risk estimates using maximum concentrations indicated risk. For those COPECs suggesting risk based on maximum detected concentrations, 95% UCLs were calculated using the most recent version of ProUCL. The final list of COPECs and EPCs used for the risk evaluation is presented in Tables 27 and 28 for soil and sediment, respectively. For a handful of COPECs, EPCs were further refined to mean concentrations when 95% UCLs indicated risk. Mean concentrations were considered a reasonable exposure point concentration because, assuming available food sources and cover are equal throughout the exposure area, receptors would not spend a greater percent of their foraging time at any on...
Sample 1
Exposure Assessment. The objectives of an exposure assessment are to identify actual or potential exposure pathways, to characterize the potentially exposed populations, and to determine the extent of the exposure. Exposed populations may include industrial workers, residents, and subgroups that comprise a meaningful portion of the general population, including, but not limited to, infants, children, pregnant women, the elderly, individuals with a history of serious illness, or other subpopulations, that are identifiable as being at greater risk of adverse health effects due to exposure to hazardous materials than the general population.
Sample 1

Related to Exposure Assessment

  • Environmental Site Assessment Perform in accordance with the City Design Manual and other City requirements as designated in writing by the Director.

  • Environmental Assessment In connection with its surrender of the Premises, Tenant shall submit to Landlord, at least fifteen (15) days prior to the expiration date of this Lease (or in the event of an earlier termination of this Lease, as soon as reasonably possible following such termination), an environmental Assessment of the Premises by a competent and experienced environmental engineer or engineering firm reasonably satisfactory to Landlord (pursuant to a contract approved by Landlord and providing that Landlord can rely on the Environmental Assessment). If such Environmental Assessment reveals that remediation or Clean-up is required under any Environmental Laws that Tenant is responsible for under this Lease, Tenant shall submit a remediation plan prepared by a recognized environmental consultant and shall be responsible for all costs of remediation and Clean-up, as more particularly provided in Section 5.3, above.

  • Risk Assessment An assessment of any risks inherent in the work requirements and actions to mitigate these risks.

  • Needs Assessment The determination of whether the Annual Income of a family or individual occupying or seeking to occupy a Qualifying Unit complies with the requirements for Extremely Low-Income Households or Low- to Moderate-Income Households shall be made by the applicable housing authority in the CDBG-DR Program area prior to admission of such family or individual to occupancy of a Qualifying Unit.

  • Joint Assessment If the Premises are not separately assessed, Lessee's liability shall be an equitable proportion of the Real Property Taxes for all of the land and improvements included within the tax parcel assessed, such proportion to be conclusively determined by Lessor from the respective valuations assigned in the assessor's work sheets or such other information as may be reasonably available.

  • Environmental Report Prior to the Closing, the Company shall (i) provide to Purchaser a letter from the Nebraska Department of Environmental Quality ("DEQ") stating that no further investigation or remediation will be required by DEQ related to the two fuel oil underground storage tanks formerly located at KOLN-TV, Lincoln, Nebraska and noted in Section 4.7 of the Environmental Report related to KOLN-TV (the "Former USTs"), or (ii) cause, at its sole cost and expense, Xxxxxxxxxx Xxxxxx or such other environmental consultant as shall be reasonably acceptable to Purchaser (the "Environmental Consultant") to perform an investigation, consistent with applicable state regulations (the "Investigation"), of the area surrounding the Former USTs to determine if contamination from the Former USTs is present. In the event actionable levels of contamination related to the Former USTs are detected by such Investigation, the Stockholders may, at their sole discretion, elect to cause the Company to remediate the identified contamination in compliance with applicable state regulations (the "Remedial Action"). In the event the Stockholders do not make such election or the Remedial Action is not completed on or prior to the Closing Date, then the Purchase Price shall be reduced by the amount determined by the Environmental Consultant to be reasonably necessary to complete the Remedial Action. The Company shall keep the Purchaser reasonably apprised of the status of any Investigation or Remedial Action by providing the Purchaser with Material documents and information relating to the performance of the Investigation and Remedial Action. Prior to the Closing, the Company shall further cause Xxxxxxxxxx Xxxxxx or the Environmental Consultant to visually observe the towers located in Beaver Crossing and Heartwell, Nebraska and provide a letter report summarizing such observations to Purchaser and the Company. The Environmental Consultant's costs to conduct such visual observations shall be paid equally by the Stockholders and Purchaser. Such letter report shall state that no condition exists with respect to the assets currently owned, leased, operated, or controlled by the Company or any of the Subsidiaries that has resulted in, or would reasonably be expected to result in, any violation of an Environmental Law, any Environmental Claim, or in any Liability relating to an Environmental Matter. Such report shall include an estimate of the total cost of remedying any such condition reported therein. In the event such letter report indicates that such a condition exists, the Stockholders shall remedy such condition to Purchaser's reasonable satisfaction within ninety (90) days after the date of the Stockholders' receipt of the final draft of the letter report. If such condition cannot be remedied to Purchaser's reasonable satisfaction within ninety (90) days, the Purchase Price shall be reduced by the amount determined by Xxxxxxxxxx Xxxxxx or the Environmental Consultant to be reasonably necessary to remedy such condition.

  • Evaluation Cycle: Formative Assessment A) A specific purpose for evaluation is to promote student learning, growth and achievement by providing Educators with feedback for improvement. Evaluators are expected to make frequent unannounced visits to classrooms. Evaluators are expected to give targeted constructive feedback to Educators based on their observations of practice, examination of artifacts, and analysis of multiple measures of student learning, growth and achievement in relation to the Standards and Indicators of Effective Teaching Practice.

  • Loss Assessment We will pay up to $1000 for your share of loss assessment charged during the policy period against you by a corporation or as- sociation of property owners, when the assess- ment is made as a result of:

  • Environmental Assessments Foreclose on or take a deed or title to any commercial real estate without first conducting a Phase I environmental assessment of the property or foreclose on any commercial real estate if such environmental assessment indicates the presence of a Hazardous Substance in amounts which, if such foreclosure were to occur, would be material.

  • Data Protection Impact Assessment If, pursuant to Data Protection Law, Customer (or its Controllers) are required to perform a data protection impact assessment or prior consultation with a regulator, at Customer’s request, SAP will provide such documents as are generally available for the Cloud Service (for example, this DPA, the Agreement, audit reports or certifications). Any additional assistance shall be mutually agreed between the Parties.

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