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For the total cumulative results (rolled up source apportionment and total model outputs), the BLM is <br /> disclosing the high CARMMS scenario. Figure 2.2-5 below shows the tracked report year(2017)federal oil <br /> and gas development emissions contrasted to each CARMMS scenario,where the emissions levels of each <br /> pollutant are shown relative to the high scenario (i.e., the high scenario is 100 percent on the graph). In <br /> most cases the 2015 emissions are far below the low CARMMS scenario, such that this has been deemed <br /> the appropriate scenario to disclose given the likelihood or potential for emissions generating activities to <br /> exceed the 2025 estimates in the short term. As noted above, the mining emissions were held constant <br /> in all future year scenarios such that those impacts are static regardless of the CARMMS oil and gas <br /> scenario. <br /> CARMMS Scenarios <br /> I <br /> zo <br /> En <br /> Ilk <br /> SI w <br /> Nigh N..J .... ei..ii e. <br /> Figure 2.2-5 CARMMS BLM CO Cumulative Oil&Gas Tracking(Federal) <br /> As shown in Figure 2.2-6, it is evident that the surface mines are driving the estimated PM impacts within <br /> the CARMMS model from all the federal emissions.We also note that the impacts represent the maximum <br /> contributions recorded (in the form of the applicable standard), but that these maximums are not <br /> necessarily relative to any exceedance values that may have been modeled for a pollutant shown <br /> (Table 2.2-18). <br /> Table 2.2-18 Maximum Source Group Contributions Mines High Oil and Gas Scenario <br /> (A2) <br /> Visibility Impacts Deposition AQRV Max Contribution to <br /> Exceedance <br /> Source Group <br /> Max Days> Days> (kgN/ha-yr) Impacted Area 03(ppb) PMz.s <br /> dv 0.5dv 1.Odv (ug/m3) <br /> CO O&G and Mines 0.0287 <br /> (federal) (A2)Class I 1.60 50 5 0.0124 Dinosaur NM 4.6 <br /> CO O&G and Mines 0.0287 <br /> (federal) (A2)Class II 2.63 103 37 0.0065 Dinosaur NM 4.6 <br /> Dunn Ranch Area LBA and Mining Plan Modification 34 <br /> Technical Resources Report <br />