Background Concentrations Sample Clauses

Background Concentrations. To develop a realistic nationwide CO background concentration estimate, observed data for 8- hour and 1-hour average CO concentrations were extracted from EPA’s AirData for each of the three most recent years (2014-2016). AirData is a database of air monitoring data. Datasets representing the 1-hour average, 8-hour average, and annual summary statistics from all reporting sites are available.16 To determine a nationally representative background concentration, we chose a form consistent with the CO design value (the 2nd highest non-overlapping observed CO concentrations) and the form of the CO national ambient air quality standards (NAAQS) from each of the nation’s CO monitoring stations. We determined the range of reported DVs from all stations in AirData, excluding those in Mexico and Puerto Rico, from 2014-2016. Table 8 shows the 90th, 95th, and 99th percentiles from the reported DVs from each station in the record meeting a 75% data completeness threshold. To accommodate the recent trend and be consistent with the form of the DV, Table 8 also shows the maximum from the three most recent years for each of those percentages. Based on this review, it was determined that a reasonably conservative value, applicable to almost any location nationwide, is the highest 95th percentile CO concentration from the past three years (Table 8). Using this value, the representative 1-hour background concentration was determined to be 4.4 ppm and the representative 8-hour background concentration was determined to be 2.4 ppm. Percentile 2011 2012 2013 Highest 99th 3.4 2.9 3.7 3.7 95th 2.4 2.3 2.2 2.4 90th 2.0 2.0 1.8 2.0 99th 6.5 5.7 7.2 7.2 95th 4.3 4.4 4.2 4.4 90th 3.2 3.1 2.9 3.2 Source: USEPA AIRData (2018) 16 This analysis was based on tabular pre-generated data files available at: xxxxx://xxx.xxx.xxx/aqsweb/airdata/download_files.html For future years mobile sources are expected to remain the primary source of CO emissions nationwide. EPA provides for the option to adjust for future CO concentrations as a result of emissions rate changes in the mobile source fleet. Continued fleet turnover at a national level to vehicles constructed to more stringent EPA emission standards may reasonably be expected to result in reduced emission rates in the future. However, to preserve the conservative, worst-case approach, no reductions in future emission rates and background levels were assumed for this study. Thus, the results presented in the following Section are representati...
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  • OPEN SOURCE COMPONENTS The DS Offerings may include open source components. Whenever notices (such as acknowledgment, copies of licenses or attribution notice) are required by the original licensor, such notices are included in the Documentation of the DS Offerings. Moreover, some open source components may not be distributed and licensed under the terms of the Agreement but under the terms of their original licenses as set forth in the Documentation of the DS Offerings themselves. Source code for open source software components is available upon request. Except for components mentioned in the section EXCLUSIONS below, the warranty and indemnification provided by DS under the Agreement apply to all open source software components and shall be provided by DS and not by the original licensor, but only for the use of the DS Offerings that is in compliance with the terms of the Agreement, and in conjunction with the DS Offerings. The original licensors of said open source software components provide them on an “as is” basis and without any liability whatsoever to Customer.

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  • THIRD PARTY WEBSITES AND CONTENT The Website contains (or you may be sent through the Website or the Company Services) links to other websites ("Third Party Websites") as well as articles, photographs, text, graphics, pictures, designs, music, sound, video, information, applications, software and other content or items belonging to or originating from third parties (the "Third Party Content"). Such Third Party Websites and Third Party Content are not investigated, monitored or checked for accuracy, appropriateness, or completeness by us, and we are not responsible for any Third Party Websites accessed through the Website or any Third Party Content posted on, available through or installed from the Website, including the content, accuracy, offensiveness, opinions, reliability, privacy practices or other policies of or contained in the Third Party Websites or the Third Party Content. Inclusion of, linking to or permitting the use or installation of any Third Party Website or any Third Party Content does not imply approval or endorsement thereof by us. If you decide to leave the Website and access the Third Party Websites or to use or install any Third Party Content, you do so at your own risk and you should be aware that our terms and policies no longer govern. You should review the applicable terms and policies, including privacy and data gathering practices, of any website to which you navigate from the Website or relating to any applications you use or install from the Website. Any purchases you make through Third Party Websites will be through other websites and from other companies, and Company takes no responsibility whatsoever in relation to such purchases which are exclusively between you and the applicable third party. Company reserves the right but does not have the obligation to:

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