Former Guterl Specialty Steel Site

Transcription

1 Former Guterl Specialty Steel Site Environmental Monitoring Report U. S. ARMY CORPS OF ENGINEERS BUILDING STRONG Buffalo District Formerly Utilized Sites Remedial Action Program May 2015 Site Description The Former Guterl Specialty Steel Corporation Site (Guterl Site) is located 20 miles northeast of Buffalo, New York, in Lockport, Niagara County, New York. The 70- acre site is being investigated by the U.S. Army Corps of Engineers under the Formerly Utilized Sites Remedial Action Program (FUSRAP). The site is comprised of a combination of parcels that make up three general areas: the 52-acre Allegheny Ludlum Corporation property [also referred to as the Niagara County Industrial Development Agency (NCIDA) property], the 9-acre Landfill Area, and the 9-acre Excised Area. The FUSRAP investigation also Aerial view of the Guterl Site looking southwest includes areas adjacent to these properties: a privately owned lot to the north of the landfill, a railroad right-of-way to the north of the NCIDA property, and a stretch of the Erie Canal directly southeast of the site. The Allegheny Technologies, Inc., Allvac, operates a specialty steel manufacturing facility in the southwest portion of the property. Land use near the Guterl Site is mixed, consisting of private residences and light industries. To the south-southeast of the Guterl Site, the Erie Canal separates the Guterl Site from private farmlands. Purpose The purpose of groundwater monitoring at the Guterl Site is to determine the potential for movement of FUSRAP-related radiological contaminants (i.e., associated with historic activities at the site in support of the nation's early atomic energy and weapons program). A subset of the on-site groundwater wells is sampled annually to: 1) monitor conditions at the site and 2) supplement the remedial investigation/ feasibility study (RI/FS), to determine the type and extent of radiological contamination and associated risk, and develop and evaluate alternatives to address unacceptable risks. The Corps of Engineers posts annual environmental monitoring data reports to the Environmental Monitoring s Section of the Buffalo District webpage for the Guterl Site. Scope Based on data collected from previous sampling events, groundwater wells at the Guterl Site were selected for sampling (chosen based upon their potential for FUSRAP-related radiological impacts). Wells that have exhibited consistently low uranium concentrations in the past, or that are located in an area of bounded contamination, might not have been chosen for sampling in 2013 and Seeps from the northern wall of the Erie Canal, and surface water from the Erie Canal were sampled in September 2013 and May Seeps were chosen for sampling based on availability, and surface

2 water samples from the Erie Canal were collected across from the Niagara County Water District emergency drinking water intakes for the City of Lockport. Figure 1 shows the existing wells at the Guterl Site and highlights the 25 shallow and deep groundwater wells, two seeps, and surface water locations sampled in 2013 and Samples collected from these locations were analyzed at a laboratory for uranium; the most mobile (i.e. fastest moving) FUSRAP-related radiological contaminant at the Guterl Site. Select locations were sampled for volatile organic compounds. Results and Interpretation Table 1 lists the unfiltered (total) and filtered (dissolved phase) analytical results for isotopic and total uranium, for the 2013 and 2014 surface water samples collected in the Erie Canal. As a reference, historical values are also presented. The results indicate that the surface waters of the Erie Canal do not show elevated concentrations of uranium and that, in general, the uranium concentration has remained unchanged over the years. Table 2 presents the unfiltered and filtered analytical results for isotopic and total uranium, for the groundwater samples collected at the site in 2013 and The groundwater sample results indicate that multiple wells show low-level impacts of uranium. The results are consistent with historical (i.e. 2007, and ) data as shown in Table 2. The shallow groundwater plume exhibits uranium transport from the northwest portion of the site to the southeast portion of the site, towards the Erie Canal (Figures 2 to 4). The deep groundwater plume also extends from the northwest to the southeast portion of the site towards the Erie Canal. The deep groundwater plume is much smaller in size than the shallow groundwater plume (Figures 5 to 7). Seasonal variation of the plumes is observed, i.e., there is slight contraction and expansion of the plume to the northeast and west of the site. This contraction and expansion is mainly due to the variation in uranium concentrations at wells MW-13D, MW-602D, and MW-09. Groundwater-monitoring well MW-605D (unfiltered), located at the center of the Guterl Site, has the highest total uranium concentration (292 µg/l) in groundwater. Seep samples were collected on the northern wall of the Erie Canal. Table 3 presents the unfiltered and filtered analytical results for isotopic and total uranium, for the 2013 and 2014 seep samples. Historical seep data is presented as a reference. The results indicate that the seeps sampled, located at groundwater discharge points downstream from the Guterl Site, show low-level impacts of uranium and concentrations for 2013 and 2014 are slightly lower than previous years. The seeps located closer to the Lockport Bypass exhibit lower concentrations of uranium than the seeps located closest to the site. Conclusions Groundwater at the Guterl Site is impacted with low-levels of uranium. Groundwater under the Guterl Site is currently not a source of potable (i.e. drinking) water there; therefore, there is no risk to human health. Seeps, located at groundwater discharge points downstream from the Guterl Site, show low-level impacts of uranium. The extent of uranium impacts on the Erie Canal seeps has been determined and will continue to be monitored. The low levels of uranium in the seeps will not have an adverse impact to users of the canal. Uranium concentrations in surface water in the Erie Canal are indistinguishable from uranium concentrations measured upstream of the site. Groundwater, seep, and surface water sampling will continue in order to monitor conditions at the site and support the FS for the Guterl Site. U.S. ARMY CORPS OF ENGINEERS BUFFALO DISTRICT ENVIRONMENTAL PROJECT MANAGEMENT TEAM 1776 NIAGARA STREET, BUFFALO, N.Y Phone: (Option 4) fusrap@usace.army.mil Website:

3 ³ Richfield St MW-600S MW-600D Crosby Ave S New York St S Bristol Ave Richfield St MW-17 Simonds St MW-16 MW-21 MW-20 MW-15 MW-701DD MW-13S MW-13D MW-602D MW-14 MW-601D MW-702DD MW-606DR MW-7 MW-606D MW-22 MW-18 MW-607D MW-703DD MW-03 MW-605D MW-23 MW-12 MW-704DD MW-603D MW-06 MW-10 MW-1 MW-705D MW-705DD MW-19 MW-706DD Lockport Byp SW MW-04 MW-25 MW-707DD MW-11 MW-26 MW-24 MW-05 MW-08 MW-9 MW-02 MW-708DD MW-713D MW-709DD MW-710DD MW-710D MW-604D MW-712D MW-712DD Seep Ohio St #I#I#I#I Seep Seep Surface-0514 Surface-0913 State Rd MW-711D MW-711DD Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\210115_WGSamples.mxd Legend Deep Monitoring Well Shallow Monitoring Well Seep Sample Location #I Surface Water Sample Location U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY Document Name: _WGSamples.mxd Drawn By: H5TDESPM Date Saved: 11 May 2015 Time Saved: 9:38:40 AM Seep ! Monitoring Well Sampled in 2013/ & 2014 SAMPLING LOCATIONS GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK Summit St Feet FIGURE 1

4 Crosby Ave Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\070415_1012ShallowWG.mxd ³ Richfield St MW-600S MW-600D U (F), 1.54 U (unf), 1.41 Bright St Stevens St Ohio St S New York St MW-16 U (F), 28.1 U (unf), 27.1 MW-607D U (F), 12.2 U (unf), 13.9 MW-13D U (F), 107 U (unf), 109 MW-14 MW-606D MW-17 MW-15 MW-606DR MW-703DD MW-18 U (F), 149 U (unf), 146 MW-705D MW-705DD MW-19 U (F), 18.8 U (unf), 18.9 MW-13S MW-701DD MW-706DD MW-601D U (F), 8.17 U (unf), 7.3 MW-605D U (F), 266 U (unf), 270 Lockport Byp SW MW-21 U (F), 5.2 U (unf), 5.4 MW-704DD MW-23 U (F), 8.46 U (unf), 8.72 MW-04 U (F), 41.2 U (unf), 39.6 MW-25 U (F), 162 U (unf), 166 MW-26 U (F), 260 U (unf), 243 MW-702DD MW-24 U (F), 11.9 U (unf), 8.02 MW-604D U (F), 111 U (unf), 112 MW-707DD MW-20 U (F), 9.98 U (unf), 9.57 MW-602D U (F), 110 U (unf), 110 MW-709DD MW-03 MW-12 MW-05 MW-712D MW-712DD MW-22 U (F), 12.3 U (unf), 12.9 MW-10 MW-710DD MW-07 U (F), 36.6 U (unf), 37.4 MW-06 MW-08 MW-708DD MW-710D U (F), 66.8 U (unf), 66 MW-603D U (F), 6.71 U (unf), 6.58 MW-01 U (F), 3.29 U (unf), 3.44 MW-09 U (F), 41.1 U (unf), 41 MW-02 U (F), 24 U (unf), 23.8 MW-713D U (F), ND U (unf), ND MW-11 U (F), 33 U (unf), 32.1 #I#I SEEP _ U (F), 0.91 U (unf), 0.90 ERIE CANAL SURFACE U (F), 0.60 U (unf), 0.60 State Rd SEEP U (F), 33 U (unf), 35.4 MW-711D U (F), 4.09 U (unf), 4.02 MW-711DD SEEP U (F), 36.8 U (unf), 36.2 Summit St Legend #I Surface Water Sample Location Extent of Groundwater 10 ug/l Notes: U (F) - Total Uranium Filtered U (unf) - Total Uranium Unfiltered Deep Monitoring Well Shallow Monitoring Well Seep Sample Location Site Boundary Extent of Groundwater 30 ug/l Extent of Groundwater 90 ug/l All concentrations reported in ug/l. ug/l - Micrograms per Liter. Location ID MW-25 U (unf), 166 Radionuclide Activity Feet U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY TOTAL URANIUM IN SHALLOW GROUNDWATER (OCTOBER 2012) Document Name: _1012ShallowWG.mxd Drawn By: H5TDESPM Date Saved: 11 May 2015 Time Saved: 9:49:32 AM GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK FIGURE 2

5 Crosby Ave Ohio St Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\160315_0913ShallowWG.mxd ³ Richfield St MW-600S MW-600D U (F), 1.82 U (unf), 2.12 Bright St S New York St Stevens St MW-16 U (F), 36.4 U (unf), 35.7 MW-607D U (F), 13 U (unf), 13.4 MW-13D U (F), 80.5 U (unf), 80 MW-14 MW-606D MW-703DD MW-17 MW-15 MW-705D MW-705DD MW-606DR MW-18 U (F), 150 U (unf), 155 MW-19 U (F), 18.3 U (unf), 18.6 MW-13S MW-701DD MW-706DD MW-605D U (F), 255 U (unf), 247 MW-21 U (F), 2.11 U (unf), 1.91 MW-601D MW-704DD MW-23 U (F), 5.1 U (unf), 5.58 MW-25 U (F), 160 U (unf), 154 MW-26 U (F), 4.18 U (unf), 4.95 MW-702DD MW-04 MW-707DD MW-20 U (F), 14.7 U (unf), 14.4 MW-602D U (F), 153 U (unf), 162 MW-22 MW-03 MW-12 MW-05 MW-11 MW-24 Simonds St MW-10 MW-07 U (F), 9.95 U (unf), 9.07 MW-06 MW-08 MW-02 MW-708DD MW-603D U (F), 7.44 U (unf), 7.68 MW-01 U (F), 3.47 U (unf), 3.43 MW-09 U (F), 117 U (unf), 111 MW-713D _ U (F), U (unf), ERIE CANAL Lockport Byp SW MW-604D U (F), 97.9 U (unf), 97.2 MW-709DD MW-712D MW-712DD MW-710DD MW-710D U (F), 59.1 U (unf), 60.3 #I#I Surface-0913 U (F), U (unf), State Rd Seep U (F), 25.7 U (unf), 26.3 MW-711D U (F), 4.88 U (unf), 4.88 MW-711DD Seep U (F), 23.6 U (unf), 24.4 Summit St Legend #I Surface Water Sample Location Extent of Groundwater 10 ug/l Notes: U (F) - Total Uranium Filtered U (unf) - Total Uranium Unfiltered Deep Monitoring Well Shallow Monitoring Well Seep Sample Location Site Boundary Extent of Groundwater 30 ug/l Extent of Groundwater 90 ug/l All concentrations reported in ug/l. ug/l - Micrograms per Liter. Location ID MW-25 U (unf), 154 Radionuclide Activity Feet U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY TOTAL URANIUM IN SHALLOW GROUNDWATER (SEPTEMBER 2013) Document Name: _0913ShallowWG.mxd Drawn By: H5TDESPM Date Saved: 17 Mar 2015 Time Saved: 3:18:35 PM GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK FIGURE 3

6 Crosby Ave Ohio St Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\160315_0514ShallowWG.mxd ³ Richfield St MW-600S MW-600D U (F), 2.08 U (unf), 2.26 Bright St S New York St Stevens St MW-16 U (F), 26 U (unf), 25.3 MW-607D U (F), 14.7 U (unf), 15.8 MW-13D U (F), 98.5 U (unf), 103 MW-14 MW-606D MW-703DD MW-17 MW-15 MW-705D MW-705DD MW-606DR MW-18 U (F), 117 U (unf), 102 MW-19 U (F), 24.7 U (unf), 25.8 MW-13S MW-701DD MW-706DD MW-605D U (F), 267 U (unf), 292 MW-21 U (F), 2.51 U (unf), 3.13 MW-601D MW-704DD MW-23 U (F), 5.18 U (unf), 5.55 MW-25 U (F), 170 U (unf), 166 MW-26 U (F), 223 U (unf), 219 MW-702DD MW-04 MW-707DD MW-20 U (F), 16.9 U (unf), 17.1 MW-602D U (F), 120 U (unf), 115 MW-22 MW-03 MW-12 MW-05 MW-11 MW-24 Simonds St MW-10 MW-07 U (F), 2.75 U (unf), 2.84 MW-06 MW-08 MW-02 MW-708DD MW-603D U (F), 7.95 U (unf), 8.08 MW-01 U (F), 3.85 U (unf), 3.85 MW-09 U (F), 48.7 U (unf), 46 MW-713D _ U (F), U (unf), ERIE CANAL Lockport Byp SW MW-604D U (F), 67.9 U (unf), 63.6 MW-709DD MW-712D MW-712DD MW-710DD MW-710D U (F), 44.5 U (unf), 44.8 #I#I Surface-0514 U (F), U (unf), State Rd Seep U (F), 17.9 U (unf), 17.7 MW-711D U (F), 5.46 U (unf), 4.95 MW-711DD Seep U (F), 5.97 U (unf), 6.01 Summit St Legend #I Surface Water Sample Location Extent of Groundwater 10 ug/l Notes: U (F) - Total Uranium Filtered U (unf) - Total Uranium Unfiltered Deep Monitoring Well Shallow Monitoring Well Seep Sample Location Site Boundary Extent of Groundwater 30 ug/l Extent of Groundwater 90 ug/l All concentrations reported in ug/l. ug/l - Micrograms per Liter. Location ID MW-25 U (unf), 166 Radionuclide Activity Feet U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY TOTAL URANIUM IN SHALLOW GROUNDWATER (MAY 2014) Document Name: _0514ShallowWG.mxd Drawn By: H5TDESPM Date Saved: 11 May 2015 Time Saved: 9:59:42 AM GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK FIGURE 4

7 Ohio St Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\070415_1012DeepWG.mxd ³ Richfield St Bright St Stevens St S New York St MW-600D MW-600S Crosby Ave MW-17 Simonds St MW-16 MW-15 MW-21 MW-701DD MW-20 MW-14 MW-606D MW-703DD MW-607D MW-13S MW-13D MW-606DR MW-18 MW-601D MW-602D MW-702DD MW-704DD U (F), 73.4 U (unf), 72.4 MW-22 MW-03 MW-07 MW-10 MW-603D MW-06 Lockport Byp SW MW-605D MW-23 MW-12 MW-01 MW-705D MW-705DD MW-19 MW-706DD MW-707DD U (F), 8.4 U (unf), 9.4 MW-26 MW-25 MW-04 MW-24 MW-05 MW-11 MW-02 MW-08 MW-09 MW-713D MW-708DD U (F), 20.1 U (unf), 20 SEEP ERIE CANAL MW-709DD U (F), 83.8 U (unf), 85.9 MW-604D MW-710D MW-710DD U (F), 28.3 U (unf), 28.6 MW-712DD U (F), 30.8 U (unf), 28.3 MW-712D SEEP #I#I SEEP SURFACE State Rd MW-711D MW-711DD U (F), 1.63 U (unf), 1.49 Summit St Legend #I Surface Water Sample Location Extent of Groundwater 10 ug/l Notes: U (F) - Total Uranium Filtered U (unf) - Total Uranium Unfiltered Deep Monitoring Well Shallow Monitoring Well Seep Sample Location Site Boundary Extent of Groundwater 30 ug/l Extent of Groundwater 90 ug/l All concentrations reported in ug/l. ug/l - Micrograms per Liter. Location ID MW-709DD U (unf), 82.7 Radionuclide Activity Feet U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY TOTAL URANIUM IN DEEP GROUNDWATER (OCTOBER 2012) Document Name: _1012DeepWG.mxd Drawn By: H5TDESPM Date Saved: 11 May 2015 Time Saved: 10:02:12 AM GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK FIGURE 5

8 Ohio St Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\160315_0913DeepWG.mxd ³ Richfield St Bright St S New York St Stevens St MW-600S MW-600D Crosby Ave MW-17 Simonds St MW-16 MW-15 MW-21 MW-701DD MW-20 MW-14 MW-606D MW-703DD MW-607D MW-13S MW-13D MW-606DR MW-18 MW-601D MW-602D MW-702DD MW-22 MW-03 MW-07 MW-10 MW-603D MW-06 MW-605D MW-704DD MW-23 MW-12 MW-01 Lockport Byp SW MW-705D MW-705DD MW-19 MW-706DD MW-04 MW-25 MW-707DD MW-26 MW-24 MW-05 MW-11 MW-02 MW-08 MW-09 MW-713D MW-708DD U (F), 20.7 U (unf), 23.2 ERIE CANAL MW-604D MW-710DD MW-710D MW-709DD U (F), 68.5 U (unf), 33.9 MW-712D MW-712DD U (F), 14.2 U (unf), 13.5 #I#I Seep Surface-0913 State Rd Seep MW-711D MW-711DD U (F), 1.24 U (unf), 3.88 Summit St Legend #I Surface Water Sample Location Extent of Groundwater 10 ug/l Notes: U (F) - Total Uranium Filtered U (unf) - Total Uranium Unfiltered Deep Monitoring Well Shallow Monitoring Well Seep Sample Location Site Boundary Extent of Groundwater 30 ug/l Extent of Groundwater 90 ug/l All concentrations reported in ug/l. ug/l - Micrograms per Liter. Location ID MW-709DD U (unf), 33.9 Radionuclide Activity Feet U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY TOTAL URANIUM IN DEEP GROUNDWATER (SEPTEMBER 2013) Document Name: _0913DeepWG.mxd Drawn By: H5TDESPM Date Saved: 11 May 2015 Time Saved: 10:04:07 AM GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK FIGURE 6

9 Ohio St Document Path: K:\Guterl\GIS\ArcMap\Groundwater\2015\160315_0514DeepWG.mxd ³ Richfield St Bright St S New York St Stevens St MW-600S MW-600D Crosby Ave MW-17 Simonds St MW-16 MW-15 MW-21 MW-701DD MW-20 MW-14 MW-606D MW-703DD MW-607D MW-13S MW-13D MW-606DR MW-18 MW-601D MW-602D MW-702DD MW-22 MW-03 MW-07 MW-10 MW-603D MW-06 MW-605D MW-704DD MW-23 MW-12 MW-01 Lockport Byp SW MW-705D MW-705DD MW-19 MW-706DD MW-04 MW-25 MW-707DD MW-26 MW-24 MW-05 MW-11 MW-02 MW-08 MW-09 MW-713D MW-708DD U (F), 16.3 U (unf), 15.2 ERIE CANAL MW-604D MW-710DD MW-710D MW-709DD U (F), 81.2 U (unf), 74.8 MW-712D MW-712DD U (F), 11.1 U (unf), 10.3 #I#I Seep Surface-0514 State Rd MW-711D MW-711DD U (F), U (unf), 1.72 Summit St Seep Legend #I Surface Water Sample Location Extent of Groundwater 10 ug/l Notes: U (F) - Total Uranium Filtered U (unf) - Total Uranium Unfiltered Deep Monitoring Well Shallow Monitoring Well Seep Sample Location Site Boundary Extent of Groundwater 30 ug/l Extent of Groundwater 90 ug/l All concentrations reported in ug/l. ug/l - Micrograms per Liter. Location ID MW-709DD U (unf), 74.8 Radionuclide Activity Feet U.S. ARMY ENGINEER DISTRICT CORPS OF ENGINEERS BUFFALO, NY TOTAL URANIUM IN DEEP GROUNDWATER (MAY 2014) Document Name: _0514DeepWG.mxd Drawn By: H5TDESPM Date Saved: 07 Apr 2015 Time Saved: 8:41:15 AM GUTERL SPECIALTY STEEL CORPORATION LOCKPORT, NEW YORK FIGURE 7

10 Table 1 Former Guterl Specialty Steel Corporation 2007 and Erie Canal Surface Water Sample Results Sept 2007 Remedial Investigation Sampling a Sample ID Uranium Uranium Uranium pci/l b pci/l b pci/l b A09-SW ± 0.14 A09-SW ± ± ± 0.14 A09-SW ± ± ± 0.13 A09-SW ± ± ± 0.15 A09-SW ± ± ± 0.09 A09-SW ± ± ± 0.14 A09-SW-007 U U 0.17 ± 0.13 A09-SW ± ± ± 0.09 A09-SW-009 U U 0.13 ± 0.11 A09-SW-010 U U 0.09 ± 0.10 A09-SW ± ± ± 0.11 A09-SW ± ± ± 0.11 Sample ID Sample Date Total Uranium (a) Uranium-234 (b) Uranium (b) Uranium (b) SW-1 Jan U SW-1 (Filtered) Jan J Surface Water # 1 May U Surface Water # 1 (Filtered) May U SURFACE Oct J SURFACE (Filtered) Oct J 0 U Surface-0913 Sep J 0 U U Surface-0913 (Filtered) Sep J J 0.03 J U Surface-0514 May J J 0.06 U Surface-0514 (Filtered) May U U J Notes: (a) Analysis for uranium, Method ASTM D5174 Modified. (b) Analysis for isotopic uranium, Method EML U-02 Modified. The Environmental Protection Agency Maximum Contaminant Level (MCL) for total uranium is 30 µg/l. pci/l: Picocuries per liter µg/l: micrograms per liter U: Non- Detect (results is below the Minimum Detectable Activity/ Minimum Detectable Concentration). J: Estimated

11 Aug U 1.27 Nov U 0.72 Sep U 1.24 MW 01 Sep U 1.29 Aug 11 4 J U 1.22 Oct J 1.05 Sep J 1.04 May J 1.23 Aug U 1.3 Nov U 0.93 Sep MW 01 (Filtered) Sep Aug J U 1.24 Oct U Sep J UJ 1.17 J May J Aug Nov MW 02 Sep Sep Aug J Oct Aug Nov MW 02 (Filtered) Sep Sep Aug J Oct Aug U 1.80 Nov U 1.56 MW 03 Sep U Sep J 1.29 Aug U Aug Nov U 1.62 MW 03 (Filtered) Sep U 1.63 Sep Aug U Aug Nov MW 04 Sep Sep Aug Oct Aug Nov MW 04 (Filtered) Sep Sep Aug Oct Page 1 of 12

12 Aug Nov U 2.09 MW 05 Sep Sep Aug Aug Nov MW 05 (Filtered) Sep Sep Aug Aug U 1.29 Nov MW 06 Sep U Sep J 1.50 Aug Aug U 1.06 Nov MW 06 (Filtered) Sep U U U Sep J 2.10 Aug Sep U U Sep MW 07 Aug Oct Sep J 2.90 May J Sep U Sep MW 07 (Filtered) Aug Oct Sep J 3.74 May U Aug U 0.26 Nov U 0.26 MW 08 Sep U U U Sep 10 1 U U Aug J 0.37 J UJ 0.24 J Aug U Nov U U MW 08 (Filtered) Sep U U U Sep 10 1 U J Aug J U 0.34 Aug Nov Sep MW 09 Sep Aug J Oct Sep May Page 2 of 12

13 Aug Nov Sep MW 09 (Filtered) Sep Aug J Oct Sep May Sep U U MW 10 Sep J Aug Sep U 0.36 MW 10 (Filtered) Sep J 1.4 Aug U Aug Nov MW 11 Sep Sep Aug J Oct Aug Nov MW 11 (Filtered) Sep U 2.34 Sep Aug J Oct Sep U MW 12 Sep Aug Sep U U MW 12 (Filtered) Sep J Aug Aug Nov Sep MW 13D Sep Aug Oct Sep May Aug Nov Sep MW 13D (Filtered) Sep J 20.9 Aug Oct Sep May Page 3 of 12

14 Aug Nov U 1.08 MW 14 Sep Sep U 1.73 Aug Aug U Nov U 1.17 MW 14 (Filtered) Sep Sep J 2.20 Aug U 2.09 Aug U 0.11 U Nov MW 15 Sep U U Sep 10 1 U J J Aug U Aug U U U Nov MW 15 (Filtered) Sep U Sep U Aug U Aug Nov Sep MW 16 Sep Aug Oct Sep May Aug Nov Sep MW 16 (Filtered) Sep Aug Oct Sep May Jul Nov U 0.57 MW 17 Sep Sep Aug Jul U Nov U MW 17 (Filtered) Sep U 2.06 Sep J 2.31 Aug Page 4 of 12

15 Aug Nov Sep MW 18 Sep Aug J Oct Sep May Aug Nov Sep MW 18 (Filtered) Sep Aug J Oct Sep May Aug U 2.18 Nov Sep U 5.04 MW 19 Sep U 6.01 Aug J Oct Sep May Aug U 1.90 Nov U 2.27 Sep U 4.37 MW 19 (Filtered) Sep U 5.40 Aug J Oct Sep May Aug Nov Sep MW 20 Sep Aug Oct Sep May Aug Nov Sep U 4.82 MW 20 (Filtered) Sep Aug Oct Sep May Page 5 of 12

16 Aug U 1.65 Nov U 2.34 Sep U 1.05 MW 21 Sep Aug Oct Sep J UJ 0.42 J May J Aug U 1.32 Nov Sep MW 21 (Filtered) Sep Aug U 0.93 Oct Sep U May J Aug Nov MW 22 Sep U 29.2 Sep Aug J Oct Aug Nov MW 22 (Filtered) Sep Sep J 2.82 Aug J Oct Aug U 1.97 Nov U 3.50 Sep U 2.41 MW 23 Sep J 4.81 Aug J Oct Sep J UJ 1.22 J May U 2.15 Aug Nov U 3.36 Sep MW 23 (Filtered) Sep J 2.63 Aug J Oct Sep J 1.68 May Page 6 of 12

17 Aug U 0.26 Nov MW 24 Sep Sep Aug J Oct Aug U 0.26 Nov MW 24 (Filtered) Sep U 3.73 Sep Aug J Oct Sep Sep MW 25 Aug J 3.22 J 56.4 J Oct Sep May Sep Sep MW 25 (Filtered) Aug J 3.28 J 60.5 J Oct Sep May Aug Nov Sep Sep MW 26 Aug Feb J 39.7 J J May Aug Sep J 2.20 May Aug Nov Sep Sep MW 26 (Filtered) Aug Feb J 48.4 J J May Aug Sep May Page 7 of 12

18 Aug U Nov U Sep U MW 600D Sep Aug U 0.78 Oct Sep J May U Aug Nov U 0.86 Sep U MW 600D (Filtered) Sep U Aug U Oct U Sep J May J 0.79 MW 600S Sep U 1.40 MW 600S (Filtered) Sep U Aug Nov MW 601D Sep U 0.84 Sep Aug Oct Aug Nov MW 601D (Filtered) Sep U 1.17 Sep Aug Oct Aug Nov Sep MW 602D Sep Aug Oct Sep May Aug Nov Sep MW 602D (Filtered) Sep Aug Oct Sep May Page 8 of 12

19 Aug Nov Sep MW 603D Sep Aug J Oct Sep J 2.37 May J 2.37 Aug U Nov U 3.42 Sep MW 603D (Filtered) Sep Aug J Oct Sep J 2.38 May U 2.79 Aug Nov Sep Sep MW 604D Aug Feb J May Aug Sep May Aug Nov Sep Sep MW 604D (Filtered) Aug Feb J May Aug Sep May Aug Nov Sep Sep MW 605D Aug Feb J May Aug Sep May Aug Nov Sep Sep MW 605D (Filtered) Aug J 3.38 J 67.1 J Feb J May Aug Sep May Page 9 of 12

20 Sep MW 606D Sep U 1.92 Aug J 0.19 J 2.91 J Sep MW 606D (Filtered) Sep U 1.69 Aug J J 2.37 J Nov MW 606DR Sep U 3.66 Sep Aug Nov MW 606DR (Filtered) Sep Sep Aug J 0.17 J 4.54 J Aug U U 0.01 U Nov U U Sep MW 607D Sep U 3.71 Aug Oct Sep May Aug U U U Nov U U Sep MW 607D (Filtered) Sep U 3.01 Aug Oct Sep May MW 701DD Aug MW 701DD (Filtered) Aug MW 702DD Aug MW 702DD (Filtered) Aug MW 703DD Aug U MW 703DD (Filtered) Aug 11 1 U U 0 U U Aug MW 704DD Feb J May Aug Aug MW 704DD (Filtered) Feb J May Aug MW 705D Aug J U MW 705D (Filtered) Aug J U MW 705DD Aug MW 705DD (Filtered) Aug U MW 706DD Aug U MW 706DD (Filtered) Aug U Aug MW 707DD Feb J 7.76 J May Aug Page 10 of 12

21 Aug MW 707DD (Filtered) Feb J 14.5 J May Aug Aug Jan J MW 708DD May Aug Sep May J 4.60 Aug Jan J MW 708DD (Filtered) May Aug Sep May J J 4.71 J Aug Feb J MW 709DD May Aug Sep May Aug Feb J MW 709DD (Filtered) May Aug Sep May Aug J Jan J MW 710D May Aug Sep May Aug J Jan J MW 710D (Filtered) May Aug Sep May Aug MW 710DD Jan J May Aug Aug MW 710DD (Filtered) Jan J May Aug Page 11 of 12

22 Aug MW 711D MW 711D (Filtered) MW 711DD MW 711DD (Filtered) MW 712D MW 712DD MW 712DD (Filtered) MW 713D MW 713D (Filtered) Oct Sep U 1.49 May J 1.27 Aug Oct Sep J 1.46 May U 2.04 Aug J 0.8 J UJ 0.71 J Oct Sep May J J Aug J U Oct U Sep U May J J Dry Aug Oct Sep May J 2.99 Aug Oct Sep J J 4.48 J May J J 3.42 J Aug J Jan 12 1 J U May J U Aug 12 1 U U Oct 12 1 U Sep U 0.03 U U May J J U J Aug J Jan J U May 12 1 U U Aug 12 1 U U 0.1 U Oct 12 1 U Sep J U J May J J U J Notes: (a) Analysis for uranium, Method ASTM D5174 Modified. (b) Analysis for isotopic uranium, Method EML U 02 Modified. pci/l: Picocuries per liter µg/l: micrograms per liter -- : sample not analyzed for this parameter U: Non- Detect (result is below the Minimum Detectable Activity/ Minimum Detectable Concentration). J: Estimated Page 12 of 12

23 TABLE 3 ERIE CANAL SEEP SAMPLE RESULTS Sample ID Sample Date Total Uranium (a) Uranium-234 (b) Uranium (b) Uranium (b) Seep Aug J Seep (Filtered) Aug J Seep Aug J U 1.59 Seep (Filtered) Aug J Seep Dec Seep Dec Seep Dec Seep Dec Seep Dec Seep Dec Seep May Seep (Filtered) May Seep May Seep (Filtered) May Seep May Seep (Filtered) May SEEP Oct SEEP (Filtered) Oct SEEP Oct U SEEP (Filtered) Oct U SEEP Oct SEEP (Filtered) Oct Seep Sep Seep (Filtered) Sep Seep Sep Seep (Filtered) Sep Seep May J 1.88 Seep (Filtered) May Seep May Seep (Filtered) May Notes: (a) Analysis for uranium, Method ASTM D5174 Modified. (b) Analysis for isotopic uranium, Method EML U-02 Modified. pci/l: Picocuries per liter µg/l: micrograms per liter -- : sample not analyzed for this parameter U: Non- Detect (results is below the Minimum Detectable Activity/ Minimum Detectable Concentration). J: Estimated 1 of 1