The Risk Assessment Information System

ORNL: Relative Risk Ranking Sites

These rankings are based on the EM-40 Release Site Methodology.

Select a release site to receive information concerning that site.

Please note that not all of the listed sites are linked to further information.

  1. 3001 Storage Canal (OGR)
  2. 3517 Filter Pit (Fission Product Development Laboratory)
  3. Abandoned Burn Pit
  4. Abandoned Sanitary Waste Pipeline and Septic Tank N of 7917
  5. Abandoned Underground Waste Oil Storage Tank 7002A
  6. Above-ground Demineralized-water Holding Tanks
  7. Aircraft Reactor Experiment Contaminated Tool Storage
  8. Aircraft Reactor Experiment Surface Impoundment
  9. Buried Scrap Metal Area
  10. C-14 Allocation in White Oak Trees
  11. C-14 Allocation in White Pine Trees
  12. C-14 Allocation in Woody Biomass Plantation Species
  13. C-14 Efflux in Yellow Poplar Stand
  14. C-14 Maintenance-Respiration Study
  15. C-14 Sucrose Inoculation of Oak and Pine Trees
  16. Ca-45 Tagged Forest
  17. Ca-45 Tagged Soil and Vegetation
  18. Ca-45 Tagged Trees
  19. Cesium-137 Contaminated Field (0800)
  20. Cesium-137 Erosion/Runoff Study Area (0807)
  21. Cesium-137 'Forest' Research Area
  22. Closed Contractors' Landfill (7658)
  23. Closed Scrap Metal Area (1562)
  24. Co-60 and Mn-54 Animal Study
  25. Contaminated Surfaces & Soil from 1959 Explosion in Building 3019 Cell
  26. Contamination at Base of 3019 Stack
  27. Contractor Spoils Area - Melton Valley, W-SW of 7900
  28. Contractor's Landfill (1554)
  29. Corehole 8 Plume
  30. Cr-51 Contaminated Grass Plots
  31. Cs-134 Contaminated Grasses
  32. Cs-134 Contaminated Lichens and Mosses
  33. Cs-134 Contaminated Oak Trees
  34. Cs-134 Contaminated Persimmon Tree
  35. Cs-134 Contaminated Pine and Oak Tree Seedlings
  36. Cs-134 Contaminated Soybean and Sorghum
  37. Cs-134 Tagged Tree
  38. Cs-137 Bagged Leaves Study
  39. Cs-137 Contaminated Forest Floor
  40. Cs-137 Contaminated Forest Understory
  41. Cs-137 Contaminated Meadow
  42. Cs-137, Co-60 Contaminated Forest Area
  43. Cs-137, Fe-59 Contaminated Animal Pens (McNew Hollow)
  44. Decommissioned Waste Holding Basin (3512)
  45. Drainage 1,2 in WAG 5
  46. Drainage 3 next to WAG 5
  47. Emergency Waste Basin (7821)
  48. Environmental Restoration Program Office Trailer Site
  49. Equilization Basin (3524)
  50. Equipment Storage Area (7841)
  51. Explosive and Shock-Sensitive Waste Detonation Area
  52. Fission Product Development Laboratory (FPDL) LLLW Transfer Line
  53. Fission Product Pilot Plant (3515) (FPPP)
  54. Fission Product Pilot Plant (FPPP) Contaminated Soil
  55. Former Waste Pile Area (South of NRWTP)
  56. FPDL Inactive Cells (Cells 4,5,6,7, 22, and Service Tunnel - (3517))
  57. Graphite Reactor (OGR), Building 3001
  58. Graphite Reactor Storage Canal Overflow (3001/3019)
  59. H-3 Contaminated Trees
  60. HFIR Cooling Tower Surface Impoundment
  61. HFIR/TRU Waste Collection Basin (7905)
  62. HFIR/TRU Waste Collection Basin (7906)
  63. HFIR/TRU Waste Collection Basin (7907)
  64. HFIR/TRU Waste Collection Basin (7908)
  65. Hg-197 Tagged Stream
  66. Hg-203 Tagged Stream
  67. High-Level Chemical Development Lab (4507)
  68. High-Level Chemical Development Lab Filter Pit (4556)
  69. Homogeneous Reactor Experiment (HRE) Fuel Wells (7809)
  70. Homogeneous Reactor Experiment (HRE) Pond (7556)
  71. HRE Charcoal Absorber Pit 7557
  72. HRE Charcoal Absorber Valve Pit 7559
  73. HRE Cooling Tower 7554
  74. HRE Decon Pad/Shed 7561
  75. HRE Reactor Building 7500
  76. HRE Waste Evaporator 7502
  77. HRE Waste Evaporator Loading Pit (7558)
  78. HRE Waste Valve Pit
  79. Hydrofracture Experiment Site 2 Soil Contamination (HF-S2A)
  80. Hydrofracture Experimental Site 1 (HF-S1)
  81. Hydrofracture Experimental Site 1, Soil Contamination (HF-S1A)
  82. Hydrofracture Experimental Site 2 (HF-S2)
  83. Inactive LLLW Collection Tank 3001-B
  84. Inactive LLLW Collection Tank 3003-A
  85. Inactive LLLW Collection Tank 3004-B
  86. Inactive LLLW Collection Tank 3013
  87. Inactive LLLW Collection Tank 7503A
  88. Inactive LLLW Collection Tank H-209
  89. Inactive LLLW Collection Tank T-30
  90. Inactive LLLW Collection Tank W-19
  91. Inactive LLLW Collection Tank W-20
  92. Inactive LLLW Collection/Storage Tank TH-1
  93. Inactive LLLW Collection/Storage Tank TH-2
  94. Inactive LLLW Collection/Storage Tank TH-3
  95. Inactive LLLW Collection/Storage Tank TH-4
  96. Inactive LLLW Collection/Storage Tank W-1
  97. Inactive LLLW Collection/Storage Tank W-10
  98. Inactive LLLW Collection/Storage Tank W-11
  99. Inactive LLLW Collection/Storage Tank W-13
  100. Inactive LLLW Collection/Storage Tank W-14
  101. Inactive LLLW Collection/Storage Tank W-15
  102. Inactive LLLW Collection/Storage Tank W-1A
  103. Inactive LLLW Collection/Storage Tank W-2
  104. Inactive LLLW Collection/Storage Tank W-3
  105. Inactive LLLW Collection/Storage Tank W-4
  106. Inactive LLLW Collection/Storage Tank W-5
  107. Inactive LLLW Collection/Storage Tank W-6
  108. Inactive LLLW Collection/Storage Tank W-7
  109. Inactive LLLW Collection/Storage Tank W-8
  110. Inactive LLLW Collection/Storage Tank W-9
  111. Inactive LLLW Collection/Storage Tank WC-1
  112. Inactive LLLW Collection/Storage Tank WC-15
  113. Inactive LLLW Collection/Storage Tank WC-17
  114. Inactive OHF LLLW Storage Tank T-1
  115. Inactive OHF LLLW Storage Tank T-2
  116. Inactive OHF LLLW Storage Tank T-3
  117. Inactive OHF LLLW Storage Tank T-4
  118. Inactive OHF LLLW Storage Tank T-9
  119. Isotopes Ductwork/3110 Filter House
  120. Leak in Transfer Line from Decon Facility (7819) to Pit 1 (7805)
  121. LITR Heat Exchangers (3077)
  122. LLLW Collection and Storage Tank (7560)
  123. LLLW Collection and Storage Tank (7562)
  124. LLLW Line from Valve Box to OHF
  125. LLLW Line Leak Site - Leak at Valve Pit North of Trench 7 (7818)
  126. LLLW Line Leak Site - Line Between Pit 3 (7807) and Trench 6 (7810)
  127. LLLW Lines and Leak Site - Building 7852
  128. LLLW Lines and Leak Site - OHF
  129. LLLW Lines and Leak Sites - The Melton Valley Transfer Line
  130. LLLW Lines and Leak Sites - 7500 Area
  131. LLLW Lines and Leak Sites - 7920 Ditch Line
  132. LLLW Lines and Leak Sites - Abandoned Line Central Avenue Area
  133. LLLW Lines and Leak Sites - Between W-5 and WC-19
  134. LLLW Lines and Leak Sites - Between WC-1 and W-5
  135. LLLW Lines and Leak Sites - Building 3028
  136. LLLW Lines and Leak Sites - Building 3092 Area
  137. LLLW Lines and Leak Sites - Building 3503, Ground Contamination
  138. LLLW Lines and Leak Sites - Building 3518, West
  139. LLLW Lines and Leak Sites - Building 3525 to a Sump
  140. LLLW Lines and Leak Sites - Building 4508, North
  141. LLLW Lines and Leak Sites - Building 7920 and Melton Valley Pumping Station Area
  142. LLLW Lines and Leak Sites - East of Building 2531
  143. LLLW Lines and Leak Sites - East of Building 3020 Stack
  144. LLLW Lines and Leak Sites - End of Trench 7 Access Road (Leak Site 2)
  145. LLLW Lines and Leak Sites - Gauging Station NW of Building 7852
  146. LLLW Lines and Leak Sites - General Isotopes Area (3037,3038,3034)
  147. LLLW Lines and Leak Sites - Lagoon Road and Melton Valley Drive
  148. LLLW Lines and Leak Sites - Melton Valley Drive & SWSA 5 Access Road
  149. LLLW Lines and Leak Sites - North of Bulding 3019
  150. LLLW Lines and Leak Sites - NW of Solid Waste Storage Area 1 (SWSA) 1
  151. LLLW Lines and Leak Sites - ORR Water Line [Building 3085]
  152. LLLW Lines and Leak Sites - Pit 6 SE (Leak Site 1)
  153. LLLW Lines and Leak Sites - Sewer Near Building 3500
  154. LLLW Lines and Leak Sites - South of Building 3020
  155. LLLW Lines and Leak Sites - SW Corner of Building 3019
  156. LLLW Lines and Leak Sites - Underneath Building 3026
  157. LLLW Lines and Leak Sites - Underneath Building 3047
  158. LLLW Lines and Leak Sites - Underneath Building 3515
  159. LLLW Lines and Leak Sites - Underneath Building 3550
  160. LLLW Lines and Leak Sites - West of Building 3082
  161. LLLW Lines and Leak Sites - West of Melton Valley Pumping Station
  162. Low-level Waste Line North of Lagoon Road (7800)
  163. Low Intensity Test Reactor (LITR) (3005)
  164. Low Intensity Test Reactor (LITR) Ponds (3085W)
  165. Mercury Contaminated Soil (4508)
  166. Mercury Contaminated Soil (Building 3503)
  167. Mercury Contaminated Soil (Building 3592)
  168. Mercury Contaminated Soil (Building 4501)
  169. Metal Recovery Facility (3505)
  170. Molton Salt Reactor Experiment Fuel Salt
  171. MSRE Cooling Tower 7513
  172. MSRE Diesel Generator House 7555
  173. MSRE Filter Pit [Off-Gas Filter House (7511)]
  174. MSRE Office Building (7509)
  175. MSRE Reactor Building (7503)
  176. MSRE Stack 7512
  177. MSRE Storage Well
  178. MSRE Supply Air Filter House Building 7514
  179. Municipal Sewage Sludge Application Site (XF1226)
  180. Na-22 Contaminated Soil
  181. New HF Grout Sheets
  182. New Hydrofracture Facility (HF-4)
  183. Oak Ridge Research Reactor Decay Tank Rupure Site (3087)
  184. Oak Ridge Research Reactor Heat Exchanger (3087)
  185. OGR Fan House 3003
  186. OGR Filter House 3002
  187. OGR Stack 3018
  188. OHF Grout Sheets (7852)
  189. OHF Site Surface Facilities (7852)
  190. Old Hydrofracture Facility (HF-3)
  191. Old Hydrofracture Facility (OHF) Pond (7852A)
  192. Old Landfill (NE Edge of SWSA 5)
  193. ORRR (3042) Main Building
  194. ORRR 10,000 Gallon Decay Tank
  195. ORRR 25-meter Target House (Flight Tube Building) (3107)
  196. ORRR A/C Cooling Tower (3089)
  197. ORRR Cell Vent Filters (3139)
  198. ORRR Cooling Tower #3 (Building 3103)
  199. ORRR Heat Exchanger Pit (3102)
  200. ORRR Neutron Spectrometer Station (Neutron Flight Tube Bldg 3083)
  201. ORRR NOG Filter Pit Charcoal Filter (3126)
  202. ORRR POG Filter Pit Off-Gas Filter (3109)
  203. ORRR Pumphouse (3085)
  204. Paint Solvents Storage Tank (7615)
  205. Pilot Pits 1, 2 (7811)
  206. Pit 1 (7805)
  207. Pit 2 (7806)
  208. Pit 3 (7807)
  209. Pit 4 (7808)
  210. Pool-water Cooling Tower (3086)
  211. Process Waste Basin (7711)
  212. Process Waste Pond (3539)
  213. Process Waste Pond (3540)
  214. Process Waste Sludge Basin (PWSB) (7835)
  215. Process Waste Sludge Basin (PWSB) Pipeline from PWSB to Process Waste Treatment Plant
  216. Rb 86 Contaminated Plants
  217. Reactive Chemical Disposal Area (7659B)
  218. Septic Tank - Building 7819
  219. Shielded Transfer Tank (ST1) (by 7819 Shed)
  220. Shielded Transfer Tank (ST2) (by 7819 Shed)
  221. Shielded Transfer Tank (ST3) (by 7819 Shed)
  222. Shielded Transfer Tank (ST4) (by 7819 Shed)
  223. Shielded Transfer Tank (ST5) (by 7819 Shed)
  224. Soil at HRE Decontamination Pad/Shed (7561)
  225. Soil Injection of Radioactive Gas (7659C)
  226. Solid Waste Storage Area (SWSA) 1 - (2624)
  227. Solid Waste Storage Area (SWSA) 2 - (4003)
  228. Solid Waste Storage Area (SWSA) 3 (1001)
  229. Solid Waste Storage Area (SWSA) 4 (7800)
  230. Solid Waste Storage Area (SWSA) 5 North
  231. Solid Waste Storage Area (SWSA) 5 South (7802)
  232. Solid Waste Storage Area (SWSA) 6 (7822)
  233. Solid Waste Storage Area (SWSA) 6 Explosives Detonation Trench (7822A)
  234. Solid Waste Storage Area (SWSA) 6 TVA Easement
  235. Tank W-1A Contaminated Soil
  236. Tc-95m and I-131 Contaminated Pasture
  237. Tc-95m Contaminated Soils and Plants
  238. Tc-95m Uptake Studies
  239. Tc-99 and Np-237 Contaminated Soil Lysimeters - Plutonium Floodplain
  240. Thorium Storage Wells
  241. Transfer Canal and Dissolver Pit (3505)
  242. Trash Area East of HRE Parking Lot
  243. Trench 5 (7809)
  244. Trench 6 (7810)
  245. Trench 7 (7818)
  246. Underground Exhaust Ducts 3001-3003
  247. WAG 1 White Oak Creek (WOC) Floodplain Soils and Sediments
  248. Waste Evaporator Facility (3506)
  249. Waste Holding Basin (3513)
  250. Waste Oil Storage Tank (7002W)
  251. Waste Retention Basin (7613)
  252. West End Dump Site
  253. White Oak Creek and Tributaries (0853)
  254. White Oak Lake and Embayment (7846)
  255. Zn-65 Tagged Red Oak Seedlings


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