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