131 LA UR 03 5862 - National Nuclear Security Administration ...

years for which data were reported; however, the average annual tritium emissions from Non-Key Facilities isbelow the SWEIS parameter.The SWEIS projected the maximum offsite dose to a member of the public at 5.44 millirem per year. Inthe period from 1998 to 2002, the actual dose has been lower than projected (see Table 3.1.1-2) and has notapproached the EPA dose standard of 10 millirem per year (Figure 4-3).4.1.2 Nonradioactive Air EmissionsThe Los Alamos area continues to be an attainment area for criteria air pollutants under the Clean Air Act.With few exceptions, annual emissions of criteria air pollutants from LANL operations from 1998 to 2002remained within SWEIS projections for all four categories (carbon monoxide [Figure 4-4], NO x[Figure 4-5],particulate matter [Figure 4-6], and SO x[Figure 4-7]) (see Table 3.1.2.1-1). During the Cerro Grande Fire in2000, the steam plant burned fuel oil, significantly increasing the emissions of SO x. This event is not typicalof LANL operations. In 2002, the use of air curtain destructors to dispose of trees thinned as part of the CerroGrande Rehabilitation Project resulted in higher than projected quantities of particulates and SO x. Emissionsof these two pollutants will remain higher than SWEIS projections while extensive tree thinning continuesin 2003. At the conclusion of the large-scale tree thinning, the emissions levels should drop to levels morein line with SWEIS projections. Nitrogen oxide emissions have decreased during CY 2002 due to theinstallation of flue gas recirculation equipment and to the transfer of the water pump to Los Alamos County.However, it is expected that there will an increase in NO xemissions in 2004 or 2005 when the TA-03 PowerPlant begins operation of the new combustion turbine generator.Since the SWEIS reported chemical emissions (volatile organic compounds and hazardous air pollutants)as concentrations, the data cannot be directly compared to data reported in the Yearbook. Total emissions ofvolatile organic compounds and hazardous air pollutants (see Table 3.1.2.2-1) show considerable variationover the last four years (Figure 4-8). Use of the air curtain destructors accounted for substantial increases inboth volatile organic compounds and hazardous air pollutants in 2002. As the Cerro Grande RehabilitationProject completes tree thinning and removal, emissions of volatile organic compounds and hazardous airpollutants should return to lower levels more typical of pre-fire conditions.25,00020,00015,00010,0005,000RadioactiveEmissions0Figure 4-1. Total radioactive emissions from point sources.4-2SWEIS Yearbook—2002