DOE/ORO/2327 Oak Ridge Reservation Annual Site Environmental ...

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Oak Ridge Reservation Fig. 5.19. ORNL surface water, National Pollutant Discharge Elimination System, and reference sampling locations. Expressing radioactivity concentrations as percentage of the DOE DCG values is used in this section as a means of comparing effluent points with different radioisotope signatures. Annual average concentrations were compared with DCG concentrations where applicable (there are no DCGs for gross alpha and gross beta activities) and when at least one individual measurement indicated detectable activity (i.e., at least one individual measurement had a concentration greater than or equal to the measurement’s minimum detectable activity [MDA]). For analyses that cannot differentiate between two radioisotopes (e.g., 89/90 Sr), and for radioisotopes that have more than one DCG for different gastrointestinal tract absorption factors, the most restrictive (lowest) DCG was used in the comparisons. DCGs are not intended to be thresholds for instream values as they are for effluents, but are nonetheless useful as a frame of reference. Effluents and instream concentrations are compared to DCGs that were calculated for exposures to humans by ingesting water, but their use in this section does not imply that ORNL effluents or ambient waters are sources of drinking water. In 2009, there were no measured annual average concentrations of radioactivity that exceeded 100% of DCG concentrations. The annual average concentration of at least one radionuclide exceeded 4% of the relevant DCG concentration in dry-weather discharges from eight NPDES outfalls (080, 085,204, 241, 302, 304, X01, and X12) and at instream sampling locations X13, X14, and X15. Four percent of the DCG is roughly equivalent to the 4-mrem dose limit on which the EPA radionuclide drinking water standards are based (4% of a DCG is a convenient comparison point, but it should not be concluded that ORNL effluents or ambient waters are direct sources of drinking water) (Fig. 5.20). The total annual discharges (or amounts) of radioactivity measured in stream water at WOD, the final monitoring point on WOC before the stream flow leaves ORNL, were calculated from concentration and flow. Results of those calculations for each of the past 5 years are shown in Figs. 5.21 through 5.25. CY 2009 discharges at White Oak Dam continue to be generally decreased in comparison to years 5-52 Oak Ridge National Laboratory
Annual Site Environmental Report Fig. 5.20. Radionuclides at ORNL sampling sites having average concentrations greater than 4% of the relevant derived concentration guides in 2009. Fig. 5.21. Cesium-137 discharges at White Oak Dam, 2005–2009. Fig. 5.23. Gross beta discharges at White Oak Dam, 2005–2009. Fig. 5.22. Gross alpha discharges at White Oak Dam, 2005–2009. Fig. 5.24. Total radioactive strontium discharges at White Oak Dam, 2005–2009. Oak Ridge National Laboratory 5-53
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Oak Ridge Reservation Annual Site E
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Oak Ridge Reservation 3. East Tenne
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Oak Ridge Reservation 5.3.2 Clean A
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Figures Figure Page 1.1. Location o
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Oak Ridge Reservation 3.30. Results
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Oak Ridge Reservation 7.1. Emission
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Oak Ridge Reservation CO2e Carbon D
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Oak Ridge Reservation HQ hazard quo
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Oak Ridge Reservation OST Office of
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Oak Ridge Reservation TWPC Transura
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Oak Ridge Reservation Unit conversi
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1. Introduction to the Oak Ridge Re
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Fig. 1.1. Location of the city of O
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Table 1.1 (continued) Scientific na
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2-2 Compliance Summary and Communit
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⎯ Replace 50 CRT computer monitor
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Table 3.6. Group IV Storm Water Out
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Fig. 3.45. Vinyl chloride concentra
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• changes to approved DOE directi
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East Tennessee Technology Park 3-83
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4. The Y-12 National Security Compl
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Fig. 4.11. Y-12 Electrical consumpt
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4.4.2.1 Mercury Annual Site Environ
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Discharge Point Outfall 512 (Ground
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Uranium isotopes Annual Site Enviro
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6.9 Quality Assurance Annual Site E
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Oak Ridge Reservation Source ID 7-4
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Oak Ridge Reservation 7-6 Dose Tabl
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Oak Ridge Reservation Lower Clinch
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Oak Ridge Reservation concentration
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Oak Ridge Reservation 7.1.3 Current
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Oak Ridge Reservation • Mitchell
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Oak Ridge Reservation because of PC
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Appendix A. Errata
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Appendix B. Glossary
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Oak Ridge Reservation biota — The
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Oak Ridge Reservation committed dos
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Oak Ridge Reservation hectare — A
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Oak Ridge Reservation quality facto
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Oak Ridge Reservation total dissolv
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Appendix C. Climate Overview for th
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Oak Ridge Reservation Pressure-driv
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C-6 Appendix C. Climate Overview fo
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C-8 Appendix C. Climate Overview fo
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Oak Ridge Reservation for winds fro
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Table D.1. Reference standards for
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TDEC and EPA Drinking Water Standar
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Chemical TDEC and EPA Drinking Wate
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Appendix E. National Pollutant Disc
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Appendix F. Radiation This appendix
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F.2.2 Non-ionizing Radiation Annual
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F.5.10 Dose from Consumer Products
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The ED from swimming in water conta
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Appendix G. Chemicals This appendix
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Table G.1. Chemical reference doses
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BW = body weight (70 kg), and Annua
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