Text

WEC January 2021 CA Progress Report
	ML21187A315
Person / Time
Site:	Westinghouse
Issue date:	02/15/2021
From:	Joyner D; Westinghouse
To:	Kuhn K; Office of Nuclear Material Safety and Safeguards, State of SC, Dept of Health & Environmental Control
	Trefethen, JA
References
	LTR-RAC-21-09
	Download: ML21187A315 (83)
	v • d • e

Westinghouse Electric Company Nuclear Fuel Columbia Fuel Fabrication Facility 5801 Bluff Road Hopkins, South Carolina 29061 USA SCDHEC, BLWM Kim Kuhn 2600 Bull Street Columbia, SC 29201 Direct tel: 803.647.1920 Direct fax: 803.695.3964 e-mail: joynerdp@westinghouse.com Your ref:

Our ref: LTR-RAC-21-09 February 15, 2021

Subject:

January 2021 CA Progress Report Ms. Kuhn:

In accordance with Item 19 of Consent Agreement (CA) 19-02-HW, this progress report is being submitted to you, including the following requested information:

(a) a brief description of the actions which Westinghouse has taken toward achieving compliance with the Consent Agreement during the previous month; (b) results of sampling and tests, in tabular summary format received by Westinghouse during the reporting period; (c) a brief description of all actions which are scheduled for the next month to achieve compliance with the Consent Agreement, and other information relating to the progress of the work as deemed necessary or requested by the Department; and (d) information regarding the percentage of work completed and any delays encountered or anticipated that may affect the approved schedule for implementation of the terms of the Consent Agreement, and a description of efforts made to mitigate delays or avoid anticipated delays.

In response to the above requirements, the following is being reported to the Department since the last progress report submitted on January 8, 2020. The following progress report is for work occurring from January 1-31, 2020:

(a) Actions during the previous month:

Westinghouse began implementation of the Final Remedial Investigation (RI) Work Plan on 6/10/19. To comply with Item 4 of the CA, the following actions were completed this month.

Completed the following activities to support the Southern Storage Area (SSA) Operable Unit (OU) Work Plan:

Page 2 of 5 o Excavated soil and conducted the subsequent confirmatory soil sampling under intermodal container C-21 for tetrachloroethylene on January 16, 2021.

Completed the following to support the Phase II RI Work Plan:

o Refined the Primary Soil Gas Survey Area by selecting closer sample intervals within the impacted area, conducting utility location, and installing additional soil gas sampling devices.

o Teleconferenced with SCDHEC on January 14, 2021 to discuss data collected (to date) during the course of the Phase II RI Investigation. During the teleconference, AECOM proposed additional groundwater screening locations, and permanent well locations on behalf of CFFF that were later submitted in a formal well permit request.

o Submitted a monitoring well permit request (LTR-RAC-21-08) and received approval by the Department for the installation of up to 10 additional permanent wells and 15 additional temporary wells (MW-12672).

o Conducted underground utility survey of the permanent well locations.

o Converted the temporary monitoring well at L-43 to a permanent well (W-102).

o Installed the following new permanent monitoring wells using sonic drilling:

W-98 through W-100 W-102 through W105 W-107 through W-112 Please note that the proposed well W-101 was not installed. The depth to clay, based upon the structure contour map, was estimated to be several feet deeper than what was encountered when boring W-101 was drilled. W-101 confirmed that the bottom of the screen of W-11 was within 5 feet (3.5 feet) of the clay.

Resultantly, W-11 will be reclassified as a lower zone well, thereby closing the data gap for Tc-99 distribution and migration within the surficial aquifer. Boring W-101 was abandoned with bentonite grout.

o Submitted the Sanitary Lagoon Operable Unit Sludge Characterization Work Plan as Addendum III to the RI Work Plan on January 28, 2021 (LTR-RAC-21-12).

(b) Results of sampling and tests:

Sediment Sampling Results The tabulated sediment sampling results from Phase II of the RI Work Plan are included as Attachment A of this monthly report. In addition, Figure 11, Sediment Assessment Map from the Phase II RI Work Plan is also included in Attachment A for ease of reference and to supplement the tabular data.

Localized Detection of Petroleum Hydrocarbons in Groundwater at Boring L-22 In the January 14th teleconference with DHEC, AECOM and CFFF shared that laboratory results indicated impact at groundwater screening boring L-22, at the 8-12 foot interval where petroleum hydrocarbons were detected at low concentrations. An extent of condition evaluation was performed by requesting a Library Search for volatile organic compounds (VOCs) from Pace Analytical from select groundwater screening borings and permanent monitoring wells. Results for 7 nearby wells and borings (L-22, L-23, W-35, W-39, W-43,

Page 3 of 5 W-65, and W-66) along with two control locations (W-19B and W-67) were selected and evaluated for the presence of VOCs identified in groundwater from L-22-8-12. There was only one additional detection (2,3-dimethyl-Naphthalene @ 5 ug/L in L-23 at the 31-35 screening interval). This data suggests the impact is localized to the area where L-22 was installed. As discussed during the teleconference, CFFF has included the pertinent Library Search excerpts as Attachment B.

(c) Brief description of all actions which are scheduled for the next month:

In accordance with Item 4 of the CA, Westinghouse will continue to implement the Work Plan to include the following actions:

Begin installation of the pressure transducers in February and/or March in the five monitoring wells around the Gator Pond (W-4, W-15, W-16, W-27 and W-92).

Complete installation and development of permanent monitoring well W-106.

Redevelop permanent monitoring well W-25.

Collect groundwater samples from the newly installed wells.

Collect the additional Primary Soil Gas Survey Area devices.

Initiate investigative activities for groundwater screening borings L-48 through L-58 that were proposed in the January 14th teleconference:

o Clear paths to the boring locations o Conduct underground utility survey o Conduct the groundwater screening Continue East Lagoon closure activities.

(d) Percentage of work completed and any delays encountered or anticipated:

20 % of Phase II Work Scope Completed. This completion estimate remains the same as the December 2020 report because of the additional work scope incorporated into the schedule after the January 14, 2021 teleconference. Currently there are no anticipated delays.

This monthly report also includes updates to information previously submitted in the July 2020 Final Interim RI Data Summary Report. During ongoing assessment of data to complete the RI, CFFF staff discovered that some results in Appendix Table A3 were mistakenly reported in the adjacent sample id column (e.g. SED-40 results for isotopic uranium analysis were reported as SED-39). The enclosed updates to the data in the July 2020 Final Interim RI Data Summary Report did not alter any of the conclusions within the report. The plume maps indicate that the plume shapes and area of impact did not change.

A comprehensive extent of condition was performed on all the data submitted with the Final Interim RI Data Summary Report, resulting in the following updates:

Tables:

Tables 3, 4, 5, and 6 needed data revisions because of manual formatting that was conducted on the tables after they were extracted from the environmental database, which resulted in data being listed in the wrong columns.

Page 4 of 5 Appendix Table A2 and Appendix Table A3 needed data revisions, also because of manual formatting errors.

Figures:

Wells sampled in duplicate did not have both results reported on the applicable figures. For example, on Figure 7, Extent of PCELower Aquifers W-33 should have been reported as 300/330 instead of 300. Similarly, W-48 should have been reported as 200/200, not 200. All affected figures (Figures 6-13), for the wells sampled in duplicate (W-10, W-33, W-48, W-49, and W-54) were updated with both results.

Extent of PCEUpper Aquifers (Figure 6):

o W-11 should be 1.4 instead of 1.1.

o Well label and result for W-18R (Lower Surficial Aquifer) should be deleted.

Extent of PCELower Aquifers (Figure 7):

o W-18R should be 3.5 instead of 3.15.

Extent of TCEUpper Aquifers (Figure 8):

o W-90 label should actually be W-91 with a NS result.

Extent of TCELower Aquifers (Figure 9):

o The locations and reported results for wells W-6 and W-18R are interchanged.

Extent of Fluoride in Groundwater (Figure 11):

o The revised figure includes a 1.0 mg/L contour around monitoring well W-52, based on a Fluoride detection of 1.39 mg/L.

Extent of Technetium-99 in Groundwater (Figure 12):

o Well markers for W-40 and W-85 were present but the numerical ids and results were missing.

o Many results were reported as <50 pCi/L, the reporting limit (RL) for Tc-99 at the time of the sampling. This is inconsistent with the reporting method for other figures in the Data Summary Report. The revised figure displays reported values, even those below the MDC and indicates as such by a # symbol. Negative values are displayed as 0 and indicated by a ## symbol.

Extent of Uranium in Groundwater (Figure 13):

o All J values were missing on the map.

o W-23R was covered up by the inset map.

o W-45 was reported as 1 in Table 3 but as 1.00 in the actual lab report and on the figure. The proper reporting of the result is 1.00.

o Aerial transparency was not consistent. It was darker than other maps and therefore corrected.

For ease of correction, the site will provide the following corrected sections of the report in digital and printed formats to update your copies of the report.

Tables (1-8)

Figures (Figures 1-17)

Appendix A, Laboratory Analytical Data Tables (Tables A1-A3)

In addition, copies of the corrected documents are provided in this report as Attachment C.

Page 5 of 5 Respectfully, Diana P. Joyner Principal Environmental Engineer Westinghouse Electric Company, CFFF 803.497.7062 (m) cc:

N. Parr, Environmental Manager J. Ferguson, EH&S Manager J. Grant, AECOM Project Manager ENOVIA Records Attachment A: Sediment Sampling Results Attachment B: Laboratory Search Excerpts, Extent of Condition at Groundwater Boring L-22 Attachment C: Updates to the Final Interim RI Report Tables and Figures

Attachment A Sediment Sampling Results

Sediment Sampling Analytical Results Westinghouse Columbia Fuel Fabrication Facility Hopkins, SC SED-16 SED-16 SED-16 SED-19 SED-19 SED-19 SED-19 SED-20 SED-20 SED-20 SED-20 SED-21 SED-21 SED-21 SED-21 0 - 6 in 6 - 12 in 12 - 24 in 0 - 6 in 6 - 12 in 12 - 18 in 12 - 18 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in N

N N

N FD N

N N

N 11/18/2020 11/18/2020 11/18/2020 12/2/2020 12/2/2020 12/2/2020 12/2/2020 11/19/2020 11/19/2020 11/19/2020 11/19/2020 11/10/2020 11/10/2020 11/10/2020 11/10/2020 SED-16P2-0-6 SED-16P2-6-12 SED-16P2-12-24 SED-19P2-0-6 SED-19P2-6-12 SED-19P2-12-18 SED-19P2-12-18-DUP SED-20P2-0-6 SED-20P2-6-12 SED-20P2-12-24 SED-20P2-24-36 SED-21P2-0-6 SED-21P2-6-12 SED-21P2-12-24 SED-21P2-24-36 Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g 0.614 #

2.62 3.71 0.208 #

1.12 0 ##

NA 0.638 #

0.265 #

0.208 #

0.700 #

1.17 0.528 #

0.225 #

0.0586 #

Radiological Uranium-233/234 13 3310 pCi/g 67.2 63.7 6.03 19.1 27.0 2.05 NA 1.72 2.13 1.43 1.49 13.2 2.19 1.56 1.75 Radiological Uranium-235/236 8

39 pCi/g 3.31 3.18 0.480 1.02 1.22 0.0675 #

NA 0.0212 #

0.0940 #

0.145 0.0841 #

0.393 0.131 #

0.0344 #

0 ##

Radiological Uranium-238 14 179 pCi/g 12.1 11.8 1.99 5.15 6.42 1.51 NA 1.67 1.50 1.89 1.40 3.79 1.51 1.07 0.970 Chemical Ammonia mg/kg 91.8 39.4 8.90 761 1100 277 NA 113 79.9 70.8 54.7 476 474 282 180 Chemical Fluoride mg/kg 15.5 10.3 3.78 59.7 28.5 3.98 NA 6.63 4.93 4.01 8.50 13.2 8.86 4.73 4.45 Chemical Solids 78.1 77.4 82.8 9.54 11.3 24.5 23.8 57.6 65 67.8 68.2 10.8 27 57.5 33.4 VOCs 1,1-Dichloroethene ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 VOCs 1,2-Dichloroethane ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 VOCs cis-1,2-Dichloroethene ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 VOCs Tetrachloroethene ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 VOCs trans-1,2-Dichloroethene ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 VOCs Trichloroethene ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 VOCs Vinyl chloride ug/kg

< 5.3

< 5

< 4.9

< 74

< 60

< 26

< 24

< 8.2

< 7.4

< 7

< 6.4

< 54

< 19

< 8.9

< 15 Location Depth Type Date Sample Page 1 of 6

Sediment Sampling Analytical Results Westinghouse Columbia Fuel Fabrication Facility Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Chemical Ammonia mg/kg Chemical Fluoride mg/kg Chemical Solids VOCs 1,1-Dichloroethene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date Sample SED-22 SED-22 SED-22 SED-22 SED-23 SED-23 SED-23 SED-23 SED-24 SED-24 SED-24 SED-38 SED-38 SED-38 SED-38 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in 12 - 18 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in N

N N

11/9/2020 11/9/2020 11/9/2020 11/9/2020 11/16/2020 11/16/2020 11/16/2020 11/16/2020 11/16/2020 11/16/2020 11/16/2020 11/10/2020 11/10/2020 11/10/2020 11/10/2020 SED-22P2-0-6 SED-22P2-6-12 SED-22P2-12-24 SED-22P2-24-36 SED-23P2-0-6 SED-23P2-6-12 SED-23P2-12-24 SED-23P2-24-36 SED-24P2-0-6 SED-24P2-6-12 SED-24P2-12-18 SED-38P2-0-6 SED-38P2-6-12 SED-38P2-12-24 SED-38P2-24-36 0.304 #

0.0333 #

0 ##

144 30.6 1.40 0.785 118 158 33.3 2.13 0.116 #

0.174 #

0.128 #

6.21 1.97 1.09 1.81 1.36 1.19 1.06 1.11 3.12 2.63 1.57 60.9 4.19 3.01 1.74 0.257 0.192 #

0.0350 #

0.225 #

0.0994 #

0.0658 #

0.0187 #

0.0379 #

0.160 #

0.153 #

0.217 3.12 0.276 0.188 0.0835 #

2.24 0.971 0.838 1.08 1.36 1.29 1.19 0.736 2.13 1.67 1.47 17.0 2.52 1.71 1.60 531 386 137 75.9 680 288 200 291 1080 1170 322 581 491 596 306 9.90 6.95 1.79 3.02 89.6 55.3 41.6 48.5 152 135 62.7 5.56 5.91 4.27 J 3.55 37.1 41.2 71 72.7 26.3 47.4 76.7 76.5 11.9 10.3 55.2 30.5 29.4 35.4 60.1

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6

< 34

< 15

< 5.6

< 7

< 25

< 9.9

< 5.3

< 5.2

< 58

< 6.5

< 9.9

< 18

< 22

< 41

< 8.6 Page 2 of 6

Sediment Sampling Analytical Results Westinghouse Columbia Fuel Fabrication Facility Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Chemical Ammonia mg/kg Chemical Fluoride mg/kg Chemical Solids VOCs 1,1-Dichloroethene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date Sample SED-38 SED-39 SED-39 SED-39 SED-39 SED-40 SED-40 SED-40 SED-40 SED-41 SED-41 SED-41 SED-41 SED-42 SED-42 24 - 36 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in FD N

N N

N 11/10/2020 11/19/2020 11/19/2020 11/19/2020 11/19/2020 11/19/2020 11/19/2020 11/19/2020 11/19/2020 11/10/2020 11/10/2020 11/10/2020 11/10/2020 11/11/2020 11/11/2020 SED-38P2-24-36-DUP SED-39P2-0-6 SED-39P2-6-12 SED-39P2-12-24 SED-39P2-24-36 SED-40P2-0-6 SED-40P2-6-12 SED-40P2-12-24 SED-40P2-24-36 SED-41P2-0-6 SED-41P2-6-12 SED-41P2-12-24 SED-41P2-24-36 SED-42P2-0-6 SED-42P2-6-12 0.144 #

0.626 #

0.732 #

0.536 #

0.281 #

0.400 #

0.199 #

0.0850 #

0.137 #

1.12 0.0380 #

0.216 #

0.185 #

1.21 0.137 #

1.66 2.22 2.37 1.58 1.86 4.69 1.34 1.17 1.36 17.0 1.84 2.14 0.806 31.1 4.34 0.0261 #

0.0959 0.0929 #

0.243 0.181 0.362 0.0449 #

0 ##

0.0645 #

0.789 0.0733 #

0 ##

0.0600 #

1.18 0.248 #

1.25 1.81 1.85 1.63 1.96 2.29 1.43 1.09 1.23 3.38 1.29 1.87 0.925 7.57 1.68 393 329 274 72.7 56.9 1110 122 140 37.2 897 367 555 896 2110 1040 3.90 2.60 2.41 J

< 1.43 3.75 3.95 0.668 J 2.09 1.42 14.6 5.18 2.10 J 5.77 26.5 7.98 54.4 56.1 57.2 67.4 67.8 30.7 66.8 68.5 75.9 8.43 18.1 41.8 30 11.6 13.1

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49

< 9.8

< 8.7

< 10

< 7.1

< 6.2

< 19

< 7.3

< 6.6

< 5.5

< 74

< 30

< 12

< 22

< 61

< 49 Page 3 of 6

Sediment Sampling Analytical Results Westinghouse Columbia Fuel Fabrication Facility Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Chemical Ammonia mg/kg Chemical Fluoride mg/kg Chemical Solids VOCs 1,1-Dichloroethene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date Sample SED-42 SED-42 SED-43 SED-43 SED-44 SED-44 SED-44 SED-45 SED-45 SED-46 SED-46 SED-47 SED-47 SED-48 SED-48 SED-48 12 - 24 in 24 - 36 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 12 - 18 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 12 - 18 in N

N N

N 11/11/2020 11/11/2020 12/1/2020 12/1/2020 12/1/2020 12/1/2020 12/1/2020 12/2/2020 12/2/2020 12/2/2020 12/2/2020 12/3/2020 12/3/2020 12/3/2020 12/3/2020 12/3/2020 SED-42P2-12-24 SED-42P2-24-36 SED-43P2-0-6 SED-43P2-6-12 SED-44P2-0-6 SED-44P2-6-12 SED-44P2-12-18 SED-45P2-0-6 SED-45P2-6-12 SED-46P2-0-6 SED-46P2-6-12 SED-47P2-0-6 SED-47P2-6-12 SED-48P2-0-6 SED-48P2-6-12 SED-48P2-12-18 0.0327 #

0 ##

0.226 #

0.00633 #

9.42 4.33 0 ##

0 ##

0.110 #

0 ##

3.19 1.57 5.13 16.0 435 34.0 3.34 6.00 2.95 11.6 10.4 3.32 4.86 2.49 2.11 1.63 0.135 #

0.0342 #

0.211 #

0.873 24.3 1.57 0.0293 #

0.325 0.0545 #

0.251 #

0.419 0.0528 #

0.0999 #

0.154 #

0.169 0.205 1.50 1.58 1.87 4.50 98.7 8.74 2.70 1.92 1.48 2.85 3.55 1.95 2.41 2.24 1.77 1.85 593 807 312 499 1070 580 299 1520 240 1980 863 1200 1670 491 112 57.4 2.21 J 2.03 J 2.67 J 9.10 32.3 19.3 15.3 103

< 3.96 120 20.6 6.37 16.5 1.86 J 3.09 1.88 32 27.8 14.3 11 6.76 13.8 27.7 12.9 20.9 9.45 18.1 21.1 12.1 15.6 59 66.8

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1

< 21

< 23

< 41

< 56

< 100

< 47

< 6.2

< 49

< 28

< 74

< 36

< 33

< 54

< 35

< 7.7

< 7.1 Page 4 of 6

Sediment Sampling Analytical Results Westinghouse Columbia Fuel Fabrication Facility Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Chemical Ammonia mg/kg Chemical Fluoride mg/kg Chemical Solids VOCs 1,1-Dichloroethene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date Sample SED-49 SED-49 SED-50 SED-50 SED-50 SED-57 SED-57 SED-57 SED-58 SED-58 SED-59 SED-59 SED-60 SED-60 SED-61 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 12 - 24 in 0 - 6 in 6 - 12 in 12 - 18 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in N

N N

12/3/2020 12/3/2020 12/3/2020 12/3/2020 12/3/2020 12/4/2020 12/4/2020 12/4/2020 12/4/2020 12/4/2020 12/3/2020 12/3/2020 11/18/2020 11/18/2020 11/18/2020 SED-49P2-0-6 SED-49P2-6-12 SED-50P2-0-6 SED-50P2-6-12 SED-50P2-12-24 SED-57P2-0-6 SED-57P2-6-12 SED-57P2-12-18 SED-58P2-0-6 SED-58P2-6-12 SED-59P2-0-6 SED-59P2-6-12 SED-60P2-0-6 SED-60P2-6-12 SED-61P2-0-6 0 ##

0 ##

NA NA NA NA NA NA NA 0.433 #

0.483 #

1.20 5.10 2.85 6.83 2.33 1.00 2.22 1.63 1.49 1.21 1.38 2.09 1.52 39.7 44.4 4.29 0.142 0.0436 #

0.351 0.152 #

0.139 0.110 #

0.101 #

0 #

0.0516 #

0.0321 #

0.0517 #

0.0494 #

2.19 1.81 0.244 #

2.25 2.04 2.65 1.83 0.808 1.82 1.74 2.05 1.37 1.15 1.88 1.27 7.42 8.17 0.818 378 280 1130 382 257 NA NA NA NA NA NA NA 45.7 57.3 14.1 9.14 5.78 7.00 2.92 2.51 J NA NA NA NA NA NA NA 19.2 14.1 3.47 17.9 35.3 15 27.2 26.2 NA NA NA NA NA NA NA 82 83.7 79.9

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6

< 40

< 16

< 46

< 21

< 25 NA NA NA NA NA NA NA

< 4.9

< 5.1

< 5.6 Page 5 of 6

Sediment Sampling Analytical Results Westinghouse Columbia Fuel Fabrication Facility Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Chemical Ammonia mg/kg Chemical Fluoride mg/kg Chemical Solids VOCs 1,1-Dichloroethene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date Sample SED-61 SED-61 SED-61 SED-62 SED-62 SED-62 SED-62 SED-63 SED-63 SED-64 SED-64 SED-65 SED-65 0 - 6 in 6 - 12 in 12 - 18 in 0 - 6 in 6 - 12 in 6 - 12 in 12 - 24 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in FD N

N N

N FD N

N N

11/18/2020 11/18/2020 11/18/2020 11/17/2020 11/17/2020 11/17/2020 11/17/2020 11/17/2020 11/17/2020 11/17/2020 11/17/2020 11/16/2020 11/16/2020 SED-61P2-0-6-DUP SED-61P2-6-12 SED-61P2-12-18 SED-62P2-0-6 SED-62P2-6-12 SED-62P2-6-12-DUP SED-62P2-12-24 SED-63P2-0-6 SED-63P2-6-12 SED-64P2-0-6 SED-64P2-6-12 SED-65P2-0-6 SED-65P2-6-12 1.12 7.96 8.28 22.9 2.89 2.98 1.08 25.0 2.63 85.8 5.53 312 8.41 15.1 9.17 3.86 1.21 1.57 1.60 1.84 0.853 0.760 1.30 1.11 1.01 1.12 0.789 0.267 0.186 0.167 #

0.0659 #

0.0636 #

0 ##

0.148 #

0.0985 #

0.0856 #

0.0301 #

0.113 #

0 ##

3.50 2.79 1.95 1.73 2.00 1.35 1.12 0.875 0.649 1.18 1.32 0.726 0.791 9.39 17.0 30.2 160 218 159 240 218 126 311 283 156 276 3.04 5.29 15.2 45.7 43.5 34.4 39.0 37.7 24.9 49.4 33.7 40.6 33.6 75.5 88.2 85.8 44.9 76.7 76.1 77.9 71.1 78 68.1 78.9 72.2 78.2

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6

< 5.7

< 5

< 4.4

< 8.9

< 5

< 5.1

< 5.2

< 5.6

< 5

< 6.6

< 4.8

< 5.4

< 4.6 Page 6 of 6

?

")

Entrance Dike Lower Sunset Lake Dike Exit Dike Canal Upper Sunset Lake Dike Denley Cemetery Upper Sunset Lake Lower Sunset Lake Mill Creek WL2 WL1 SAN NL SL EL Gator Pond SED-22 SED-19 SED-20 SED-21 SED-50 SED-47 SED-48 SED-49 SED-45 SED-46 SED-44 SED-43 SED-42 SED-41 SED-40 SED-38 SED-39 SED-16 SED-57 SED-58 SED-59 SED-60 SED-61 Upper 2 Entrance Canal 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 CCS FIGURE 11 q

0 700 350 Feet 1:8,400 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020 Revised Phase II WP\\fig_11_SedimentSamplingLocations.mxd Legend

?

Ditch Culvert Mill Creek Flow Direction Mill Creek Property Line Dike Location Sediment Sample Transect Proposed Staff Gauge Location

")

East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 EL NL SL SAN WL1 WL2 August 2020 Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Sediment Assesment Map SED-62 SED-64 SED-23 SED-63 SED-24 SED-65 Proposed Sediment Sample Location

Attachment B Laboratory Search Excerpts Extent of Condition at Groundwater Boring L-22

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company L-22-8-12 VK19098-003 11/19/2020 0951 11/19/2020 Aqueous Project Name: CVOC Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

11/23/2020 1526 ECB 75445 Analytical CAS Parameter Number Method Result Q LOQ Units Run Ethylbenzene 8260D 23 1

ug/L Benzene, 2-propenyl-8260D 25 1

ug/L Benzene, 4-ethyl-1,2-dimethyl-8260D 35 1

ug/L Benzene, 1-ethenyl-3-ethyl-8260D 21 1

ug/L Benzene, 1,2,4,5-tetramethyl-8260D 20 1

ug/L Unknown 8260D 58 1

ug/L Naphthalene, 1,2,3,4-tetrahydro-8260D 25 1

ug/L Naphthalene 8260D 80 1

ug/L Naphthalene, 2-methyl-8260D 49 1

ug/L Naphthalene, 1-methyl-8260D 37 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 8 of 19

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company L-22-8-12-DUP VK19098-005 11/19/2020 0951 11/19/2020 Aqueous Project Name: CVOC Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

11/23/2020 1550 ECB 75445 Analytical CAS Parameter Number Method Result Q LOQ Units Run Ethylbenzene 8260D 24 1

ug/L Benzene, 2-propenyl-8260D 26 1

ug/L Benzene, 1-ethyl-2,3-dimethyl-8260D 36 1

ug/L Benzene, 1-ethenyl-3-ethyl-8260D 22 1

ug/L Benzene, 1,2,3,5-tetramethyl-8260D 20 1

ug/L Benzene, 1,2,4,5-tetramethyl-8260D 60 1

ug/L Naphthalene, 1,2,3,4-tetrahydro-8260D 26 1

ug/L Naphthalene 8260D 84 1

ug/L Naphthalene, 2-methyl-8260D 57 1

ug/L Naphthalene, 1-methyl-8260D 45 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 10 of 19

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company L-22-26-30 VK19098-002 11/18/2020 1649 11/19/2020 Aqueous Project Name: CVOC Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 6 of 19

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company L-23-12-16 VK21049-001 11/20/2020 1001 11/20/2020 Aqueous Project Name: CVOC Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 5 of 11

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company L-23-20-24 VK19098-007 11/19/2020 1633 11/19/2020 Aqueous Project Name: CVOC Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 14 of 19

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company L-23-31-35 VK19098-006 11/19/2020 1512 11/19/2020 Aqueous Project Name: CVOC Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

11/23/2020 1613 PAP 79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run Naphthalene, 2,3-dimethyl-8260D 5.0 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 12 of 19

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-19B-2020-Q4 VJ20054-006 10/20/2020 1210 10/20/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 41 of 92

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-35-2020-Q4 VJ13033-003 10/13/2020 1422 10/13/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 20 of 50

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-39-2020-Q4 VJ22061-004 10/22/2020 0906 10/22/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 29 of 79

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-43-2020-Q4 VJ22061-005 10/22/2020 1040 10/22/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 37 of 79

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-65-2020-Q4 VJ22061-001 10/22/2020 1038 10/22/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 6 of 79

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-66-2020-Q4 VJ22061-002 10/22/2020 1211 10/22/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 14 of 79

Library Search

==

Description:==

Matrix:

Date Received:

Client:

Laboratory ID:

Date Sampled:

Westinghouse Electric Company W-67-2020-Q4 VJ19024-003 10/19/2020 1029 10/19/2020 Aqueous Project Name: Westinghouse RI Project Number:

Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch 1

5030B 8260D 1

79578 Analytical CAS Parameter Number Method Result Q LOQ Units Run None Detected 8260D 1

ug/L LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range P = The RPD between two GC columns exceeds 40%

ND = Not detected at or above the LOQ N = Recovery is out of criteria H = Out of holding time W = Reported on wet weight basis 106 Vantage Point Drive West Columbia, SC 29172 (803) 791-9700 Fax (803) 791-9111 www.pacelabs.com Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 21 of 83

Page 2 of 2 Attachment C Updates to the Final Interim RI Report Tables and Figures Tables (1-8)

Figures (Figures 1-17)

Appendix A, Laboratory Analytical Data Tables

Table 1 - Summary of Well Construction Details and Groundwater Elevations Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Well Well Diameter (in)

Date Measured Total Depth (ft bgs)

Screen Length (ft)

Ground Surface Elevation (ft)

Top of Casing Elevation (ft)

Screen Interval (ft bgs)

Screen Interval Elevation (ft bgs)

Depth to Water (ft)

Groundwater Elevation (ft)

WRW-1 4

10/14/19 32.20 10 136.00 136.95 22.2-32.2 113.8-103.8 9.64 127.31 WRW-2 4

10/14/19 28.43 10 136.98 139.93 19-29.2 118.55-108.55 18.62 121.31 W-3A 2

10/14/19 82.86 10 117.64 120.08 72.5-82.5 44.8-34.8 8.79 111.29 W-4 4

10/14/19 15.01 2

116.50 116.09 10-12 103.5-101.5 10.38 105.71 W-6 2

10/14/19 27.78 5

136.96 136.46 23.5-28.5 114.2-109.2 11.22 125.24 W-7A 2

10/14/19 17.92 5

132.94 135.06 13-18 120-115 12.35 122.71 W-10 2

10/14/19 22.30 5

136.89 136.81 18.5-23.5 119.6-114.6 16.50 120.31 W-11 2

10/14/19 24.90 3

138.45 140.76 25.5-28.5 116.55-113.55 19.02 121.74 W-13R 2

10/14/19 20.52 5

136.38 136.13 15-20 120.9-115.9 12.96 123.17 W-14 2

10/14/19 28.91 5

136.22 137.83 23.5-28.5 112.3-107.3 17.62 120.21 W-15 2

10/14/19 20.66 5

126.67 127.90 13.5-18.5 111-106 12.90 115.00 W-16 2

10/14/19 13.23 3

125.64 124.93 15.5-18.5 115.4-112.4 3.71 121.22 W-17 2

10/14/19 27.92 5

137.57 139.27 23.5-28 114.65-109.65 14.56 124.71 W-18R 2

10/14/19 27.63 5

137.15 136.71 12.5-17.5 114.5-109.5 12.20 124.51 W-19B 4

10/14/19 40.73 10 140.58 142.85 30-40.5 109.85-99.85 25.17 117.68 W-20 2

10/14/19 15.66 5

113.27 116.16 11.5-16.3 102.6-97.6 10.60 105.56 W-22 2

10/14/19 15.10 5

137.08 136.51 13.4-17.8 127-122 11.68 124.83 W-23R 2

10/14/19 20.93 5

137.45 140.47 15.5-20.5 121.5-116.5 19.19 121.28 W-24 2

10/14/19 15.00 5

139.83 141.94 10.1-15.1 129.85-124.85 11.78 130.16 W-25 2

10/14/19 27.25 5

114.98 115.88 22.9-27.7 92.75-87.75 10.95 104.93 W-26 2

10/14/19 30.64 5

140.59 142.21 25.5-30.5 114.95-109.95 26.37 115.84 W-27 2

10/14/19 14.72 5

120.22 121.87 14.1-18.9 110.5-105.5 11.28 110.59 W-28 2

10/14/19 15.30 5

136.98 138.88 9.8-14.7 126.7-121.7 12.60 126.28 W-29 2

10/14/19 13.95 5

136.96 138.61 10-15.1 128-123 12.41 126.20 W-30 2

10/14/19 14.86 5

136.87 138.81 10.2-15.2 127-122 12.65 126.16 W-32 2

10/14/19 21.75 5

138.33 140.61 17-22.5 121.6-116.6 19.59 121.02 W-33 2

10/14/19 22.88 5

138.06 139.33 15.1-20.7 120.2-115.2 15.85 123.48 W-35 2

10/14/19 20.35 5

136.59 139.07 16-21 121.25-116.25 11.78 127.29 W-36 2

10/14/19 19.77 5

134.16 136.29 15-20 119.4-114.4 8.66 127.63 W-37 2

10/14/19 20.46 5

136.58 139.04 15.5-20.5 121.1-116.1 12.05 126.99 W-38 2

10/14/19 20.16 5

136.71 136.51 15-20 121.55-116.55 10.45 126.06 W-39 2

10/14/19 23.17 10 139.08 141.15 12-22 125.9-115.9 16.25 124.90 W-40 2

10/14/19 14.39 10 136.42 139.26 5-15 132.05-122.05 11.95 127.31 W-41R 2

10/14/19 24.33 10 131.02 133.81 14-24 116.7-106.7 15.94 117.87 W-42 2

10/14/19 29.91 10 137.83 140.96 20-30 117.9-107.9 26.32 114.64 W-43 2

10/14/19 21.12 10 138.09 141.33 10.5-20.5 126.95-116.95 15.65 125.68 W-44 2

10/14/19 27.04 10 131.93 134.86 16-26 114.9-104.9 18.42 116.44 W-45 2

10/14/19 15.38 10 137.20 140.02 6-16 131.8-121.8 12.85 127.17 W-46 4

10/14/19 25.84 10 132.39 134.74 15.5-25.5 116.55-106.55 14.02 120.72 W-47 4

10/14/19 45.60 10 140.70 141.90 34.3-44.8 105.1-95.1 26.99 114.91 W-48 4

10/14/19 41.30 10 139.74 142.56 30.7-41.3 108.45-98.45 27.21 115.35 W-49 2

10/14/19 117.77 10 137.82 140.25 105-115 30.05-20.05 31.07 109.18 W-50 2

10/14/19 125.41 10 136.79 139.58 114.5-124.5 21.4-11.4 25.27 114.31 W-51 2

10/14/19 14.66 5

136.67 136.51 10-15 127-122 9.27 127.24 W-52 2

10/14/19 15.55 5

136.71 136.19 10-15 126.15-116.15 9.15 127.04 W-53 2

10/14/19 15.74 5

136.83 136.54 10-15 126.1-121.1 9.42 127.12 W-54 2

10/14/19 15.85 5

136.79 136.52 10-15 125.95-120.95 9.53 126.99 W-55 2

10/14/19 15.24 5

136.90 136.63 10-15 126.65-121.65 9.72 126.91 Page 1 of 2

Table 1 - Summary of Well Construction Details and Groundwater Elevations Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Well Well Diameter (in)

Date Measured Total Depth (ft bgs)

Screen Length (ft)

Ground Surface Elevation (ft)

Top of Casing Elevation (ft)

Screen Interval (ft bgs)

Screen Interval Elevation (ft bgs)

Depth to Water (ft)

Groundwater Elevation (ft)

W-56 2

10/14/19 15.11 5

136.83 136.68 10-15 126.7-121.7 9.75 126.93 W-57 2

10/14/19 15.11 5

136.90 136.73 10-15 126.8-121.8 9.97 126.76 W-58 2

10/14/19 15.49 5

136.85 136.37 10-15 126.35-121.35 10.63 125.74 W-59 2

10/14/19 14.65 5

136.10 136.42 10-15 126.45-121.45 10.77 125.65 W-60 2

10/14/19 37.86 5

137.25 140.20 32-37 104.4-99.4 22.12 118.08 W-61 2

10/14/19 23.51 10 137.34 140.60 13-23 123.85-113.85 18.96 121.64 W-62 2

10/14/19 24.85 5

125.63 128.38 19-24 105.8-100.8 13.59 114.79 W-63 2

10/14/19 41.91 5

138.78 141.02 37-42 101.85-96.85 27.31 113.71 W-64 2

10/14/19 31.61 10 140.15 142.75 21-31 118.55-108.55 27.25 115.50 W-65 2

10/14/19 31.59 5

138.17 140.95 26.5-31.5 111.6-106.6 14.07 126.88 W-66 2

10/14/19 22.34 10 138.01 140.91 12-22 125.65-115.65 13.72 127.19 W-67 2

10/14/19 31.81 10 132.60 135.26 21-31 110.8-100.8 19.54 115.72 W-68 2

10/14/19 18.14 5

113.40 116.53 13-18 100.25-95.25 7.90 108.63 W-69 2

10/14/19 18.08 10 137.67 140.64 7.75-17.75 129.6-119.6 9.75 130.89 W-70 2

10/14/19 48.92 5

138.02 141.00 44-49 94.10-89.1 14.88 126.12 W-71 2

10/14/19 103.03 10 137.96 140.72 93-103 44.9-34.9 25.98 114.74 W-72 2

10/14/19 15.00 10 136.81 136.29 5-15 131.8-121.8 9.24 127.05 W-73 2

10/14/19 16.09 10 136.85 136.45 5-15 130.75-120.75 9.61 126.84 W-74 2

10/14/19 30.60 5

136.64 139.93 25-30 111.05-106.05 13.46 126.47 W-75 2

10/14/19 15.33 10 136.60 139.85 5-15 131.25-121.25 13.06 126.79 W-76 2

10/14/19 15.12 10 137.04 136.85 5-15 131.9-121.9 9.78 127.07 W-77 2

10/14/19 15.67 10 136.85 136.53 5-15 131.2-121.2 9.98 126.55 W-78 2

10/14/19 15.57 10 136.75 136.31 5-15 131.2-121.2 10.05 126.26 W-79 2

10/14/19 15.66 10 136.49 136.12 5-15 130.85-120.85 9.06 127.06 W-80 2

10/14/19 15.62 10 136.34 135.87 5-15 130.7-120.7 11.08 124.79 W-81 2

10/14/19 15.74 10 136.81 136.43 5-15 131.1-121.1 12.02 124.41 W-82 2

10/14/19 15.69 10 136.57 136.23 5-15 130.1-120.1 12.72 123.51 W-83 2

10/14/19 26.46 10 136.22 135.81 15.5-25.5 119.75-109.75 13.95 121.86 W-84 2

10/14/19 21.05 10 136.66 135.99 10-20 125.6-115.6 8.45 127.54 W-85 2

10/14/19 44.77 5

135.74 138.69 39-44 95.95-90.95 22.01 116.68 W-86 2

10/14/19 35.09 10 135.68 138.77 24-34 110.6-100.6 20.59 118.18 W-87 2

10/14/19 33.17 5

136.66 136.39 27-32 108.5-103.5 8.93 127.46 W-88 2

10/14/19 41.37 5

140.06 143.10 36-41 103.7-98.7 23.42 119.68 W-89 2

10/14/19 25.46 10 140.12 142.82 15-25 124.65-104.65 22.10 120.72 W-90 2

10/14/19 39.90 5

140.23 143.33 35-40 105.35-100.35 27.38 115.95 W-91 2

10/14/19 25.05 10 139.57 142.81 15-25 124.5-114.5 27.56 115.25 W-92 2

10/14/19 33.67 5

120.11 123.33 29-34 91.45-86.45 17.77 105.56 W-93 2

10/14/19 35.38 5

136.87 136.49 30-35 106.5-101.5 10.42 126.07 W-94 2

10/14/19 29.40 5

115.28 118.04 24-29 90.9-85.9 12.14 105.90 W-95 2

10/14/19 33.41 5

113.53 116.40 28-33 85.15-80.15 10.71 105.69 W-96 2

10/14/19 30.03 5

113.65 116.46 25-30 88.6-83.6 11.08 105.38 W-97 2

10/14/19 18.91 5

113.92 116.93 13-18 100-95 7.43 109.50 Gator SG 10/14/19 120.31 0.85 117.16 Upper SG 10/14/19 112.41 0.60 109.01 Lower SG 10/14/19 112.39 0.26 108.65 Creek SG 10/14/19 109.05 0.64 105.69 Notes in - inch ft - feet ft bgs - feet below ground surface SG - staff gauge Page 2 of 2

Table 2 - Summary of Floodplain Vertical Groundwater Profiling Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC L-1 L-1 L-1 L-1 L-1 L-1-DUP L-8 L-8 L-8 L-8 L-9 L-9 L-9-DUP 10 - 15 ft 28 - 33 ft 48 - 53 ft 63 - 68 ft 78 - 83 ft 78 - 83 ft 8 - 13 ft 17 - 22 ft 25 - 30 ft 41 - 46 ft 10 - 15 ft 23 - 28 ft 23 - 28 ft 8/14/2019 8/14/2019 8/14/2019 8/15/2019 8/15/2019 8/15/2019 8/20/2019 8/21/2019 8/21/2019 8/21/2019 8/21/2019 8/21/2019 8/21/2019 Group Analyte MCL Units Result Result Result Result Result Result Result Result Result Result Result Result Result Fluoride 4

mg/L NA NA NA NA NA NA 0.26

< 0.10

< 0.10 0.14 0.48

< 0.10

< 0.10 Nitrate as N 10 mg/L NA NA NA NA NA NA 0.081

< 0.020

< 0.020 5.4

< 0.020

< 0.020 1,1-Dichloroethene 7

ug/L

< 1.0

< 1.0 NA*

< 1.0

< 1.0 cis-1,2-Dichloroethene 70 ug/L

< 1.0 3.8

< 1.0

< 1.0 NA*

< 1.0

< 1.0 Tetrachloroethene 5

ug/L

< 1.0

< 1.0 NA*

< 1.0 2.2

< 1.0 6.5

< 1.0

< 1.0 trans-1,2-Dichloroethene 100 ug/L

< 1.0

< 1.0 NA*

< 1.0

< 1.0 Trichloroethene 5

ug/L

< 1.0

< 1.0 NA*

< 1.0 2.1

< 1.0 3.0

< 1.0

< 1.0 Vinyl chloride 2

ug/L

< 1.0 2.7

< 1.0

< 1.0 NA*

< 1.0

< 1.0 VOCs Well Depth Date Chemical Page 1 of 2

Table 2 - Summary of Floodplain Vertical Groundwater Profiling Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Fluoride 4

mg/L Nitrate as N 10 mg/L 1,1-Dichloroethene 7

ug/L cis-1,2-Dichloroethene 70 ug/L Tetrachloroethene 5

ug/L trans-1,2-Dichloroethene 100 ug/L Trichloroethene 5

ug/L Vinyl chloride 2

ug/L VOCs Well Depth Date Chemical L-9 L-10 L-10 L-10 L-17 L-17 L-18 L-18 L-19 L-19 32 - 37 ft 9 - 14 ft 18 - 23 ft 28 - 33 ft 15 - 20 ft 25 - 30 ft 15 - 20 ft 24 - 29 ft 7 - 12 ft 21 - 26 ft 8/21/2019 8/19/2019 8/20/2019 8/20/2019 8/16/2019 8/16/2019 8/19/2019 8/19/2019 8/20/2019 8/20/2019 Result Result Result Result Result Result Result Result Result Result

< 0.10

< 0.10 NA NA NA NA 7.8 0.16

< 0.020 1.1 0.18 0.19 NA NA NA NA 0.092 0.10

< 1.0

< 1.0 6.2 5.4

< 1.0 1.2 1.0

< 1.0

< 1.0 1.3

< 1.0

< 1.0 1.1

< 1.0

< 1.0 Notes:

MCL - Maximum Contaminant Level mg/L - milligrams per liter ug/L - micrograms per liter Bold concentrations indicate detections Concentrations in shaded cells exceed their MCL NA - Not Analyzed NA* - Not Analyzed due to an oversight by Sample Receiving at the lab not logging the VOC sample bottles in. As a result, the sample was not analyzed for VOCs.

Page 2 of 2

Table 3 - Summary of October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC W-RW1 W-RW2 W-3A W-4 W-6 W-7A W-10 W-10 W-11 W-13R W-14 W-15 W-16 W-17 W-18R W-19B W-20 W-22 W-23R W-24 W-25 W-26 W-27 W-28 W-29 W-30 W-32 W-33 W-33 W-35 W-36 10/3/2019 10/11/2019 10/10/2019 10/11/2019 10/7/2019 10/9/2019 10/9/2019 10/9/2019 10/8/2019 10/8/2019 10/18/2019 10/21/2019 10/21/2019 10/21/2019 10/7/2019 10/21/2019 10/15/2019 10/7/2019 10/18/2019 10/11/2019 10/16/2019 10/14/2019 10/10/2019 10/7/2019 10/7/2019 10/7/2019 10/8/2019 10/17/2019 10/17/2019 10/2/2019 10/2/2019 N

N N

FD N

N N

N FD N

N Group Analyte MCL Units Radiological Alpha particles 15** pCi/L 2.51 #

2.00 #

2.36 #

3.36 #

9.09 6.35 3.19 2.19 #

7.82 2.15 #

4.27 0 ##

0.421 #

2.86 #

9.79 #

2.26 #

0.912 #

2.92 #

0 ##

10.1 0.697 #

0 ##

3.14 #

2.25 #

7.57 7.17 2.89 #

2.51 #

0.793 #

0.270 #

Radiological Beta particles 50** pCi/L 3.98 11.9 1.15 #

19.4 1370 114 81.3 76.2 2450 53.2 35.6 174 10.6 538 150 0 ##

3.22 #

29.6 1.68 #

2.51 #

7.27 12.5 5.10 8.26 7.67 20.8 175 7.78 5.81 3.54 #

0 ##

Radiological Technetium-99 900 pCi/L 1.40 #

23.1 #

7.25 #

41.3#

2440 210 118 121 3420 63.4 0 ##

253 0 ##

820 214 0 ##

0 ##

57.4 0 ##

13.0 #

0 ##

2.42 #

20.1 #

11.6 #

49.7#

321 0 ##

0 ##

21.7 #

15.0 #

Radiological Uranium-234 ug/L

< 0.050

< 0.050 Radiological Uranium-235 ug/L

< 0.070

< 0.070 0.035 J

< 0.070

< 0.070 0.0177 J

< 0.070

< 0.070 0.026 J 0.199

< 0.070

< 0.070 Radiological Uranium-238 ug/L 0.0815 J 0.0743 J

< 0.200 0.146 J 0.232 0.698 0.083 J 0.114 J

< 0.200 0.139 J 0.368

< 0.200

< 0.200 0.0855 J 4.06

< 0.200

< 0.200 0.854

< 0.200

< 0.200 0.295

< 0.200

< 0.200 0.429 2.03 8.71 0.224

< 0.200

< 0.200 Radiological Total Uranium 30 ug/L 0.0815 J 0.0743 J

< 0.200 0.146 J 0.232 0.698 0.083 J 0.114 J

< 0.200 0.139 J 0.368

< 0.200

< 0.200 0.0855 J 4.10

< 0.200

< 0.200 0.872

< 0.200

< 0.200 0.295

< 0.200

< 0.200 0.429 2.05 8.91 0.224

< 0.200

< 0.200 Chemical Fluoride 4

mg/L 0.055 0.099 0.015 4.86 0.126 6.47 3.32 3.25 0.021 8.11 0.079 1.88 9.5 2.22 6.34 0.019 0.077 5.52 0.017 0.025 0.126 1.42 3.97 5.45 4.8 8.06 3.66 0.152 0.136 0.025 0.007 Chemical Nitrate as N 10 mg/L 2.1 20

< 0.020 0.023 210 390 37 37 56 18 0.061 35 3.2 16 770 3.8

< 0.020 100 0.71

< 0.020 0.067 3.2

< 0.020 6.3 11 120 170 13 13 3.2 0.11 Chemical Ammonia mg/L 0.0129 0.0581 0.0256 0.404 134 48.5 6.46 6.62 4.09 31.5 4.26 12.6 13.3 5.79 126 0.0146 0.0632 61.8 0.0154 0.0283 1.91 1.75 6.29 0.884 22.4 1.83 47.9 0.0134 0.0189 0.0075 0.0089 Metals Antimony 6

ug/L

< 20.0

< 20.0 4.52 J 3.64 J

< 20.0

< 20.0 4.02 J

< 20.0

< 20.0 VOCs 1,1-Dichloroethene 7

ug/L

< 1.0

< 1.0 VOCs 2-Butanone ug/L

< 10

< 10 VOCs Acetone ug/L

< 20

< 20 VOCs cis-1,2-Dichloroethene 70 ug/L

< 1.0

< 1.0 2.8

< 1.0

< 1.0 1.3 1.5

< 1.0

< 1.0 3.7

< 1.0

< 1.0 1.0

< 1.0

< 1.0 VOCs Tetrachloroethene 5

ug/L 1.4 140

< 1.0

< 1.0 16 1.9

< 1.0

< 1.0 1.4 15 1.1 12 7.8 4.3 3.5 150

< 1.0

< 1.0 1.4 300 330 2.6

< 1.0 VOCs trans-1,2-Dichloroethene 100 ug/L

< 1.0

< 1.0 VOCs Trichloroethene 5

ug/L

< 1.0 8.3

< 1.0

< 1.0 2.5

< 1.0

< 1.0 1.4

< 1.0 2.0 2.2

< 1.0

< 1.0 2.5

< 1.0

< 1.0 38 24

< 1.0

< 1.0 VOCs Vinyl chloride 2

ug/L

< 1.0

< 1.0 Well Date Type Page 1 of 4

Table 3 - Summary of October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Radiological Alpha particles 15** pCi/L Radiological Beta particles 50** pCi/L Radiological Technetium-99 900 pCi/L Radiological Uranium-234 ug/L Radiological Uranium-235 ug/L Radiological Uranium-238 ug/L Radiological Total Uranium 30 ug/L Chemical Fluoride 4

mg/L Chemical Nitrate as N 10 mg/L Chemical Ammonia mg/L Metals Antimony 6

ug/L VOCs 1,1-Dichloroethene 7

ug/L VOCs 2-Butanone ug/L VOCs Acetone ug/L VOCs cis-1,2-Dichloroethene 70 ug/L VOCs Tetrachloroethene 5

ug/L VOCs trans-1,2-Dichloroethene 100 ug/L VOCs Trichloroethene 5

ug/L VOCs Vinyl chloride 2

ug/L Well Date Type W-37 W-38 W-39 W-40 W-41R W-42 W-43 W-44 W-45 W-46 W-47 W-48 W-48 W-49 W-49 W-50 W-51 W-52 W-53 W-54 W-54 W-55 W-56 W-57 W-58 W-59 W-60 W-61 W-62 W-63 W-64 10/2/2019 10/4/2019 10/18/2019 10/15/2019 10/14/2019 10/22/2019 10/18/2019 10/14/2019 10/2/2019 10/21/2019 10/17/2019 10/21/2019 10/21/2019 10/24/2019 10/24/2019 10/15/2019 10/3/2019 10/3/2019 10/3/2019 10/4/2019 10/4/2019 10/4/2019 10/4/2019 10/3/2019 10/4/2019 10/5/2019 10/17/2019 10/17/2019 10/22/2019 10/21/2019 10/17/2019 N

N N

N FD N

FD N

N N

FD N

N N

N 1.75 #

2.54 #

1.22 #

0.796 #

8.93 0.753 #

0.159 #

3.47 #

4.37 0.656 #

1.60 #

0.460 #

0 ##

0.196 #

1.80 #

3.48 #

0.544 #

0 ##

1.61 #

1.55 #

1.53 #

438 264 0.202 #

4.21 44.4 0.200 #

1.31 #

0 ##

1.22 #

4.11 #

0 ##

2.43 #

8.84 3.44 #

14.3 3.16 #

3.16 #

0.283 #

16.6 40.4 61.6 9.32 7.64 4.34 #

0.719 #

0.0720 #

3.56 1.61 #

1.72 #

1.96 #

0.741 #

77.3 54.5 3.09 #

2.43 #

17.4 1.38 #

0.862 #

4.85 3.32 #

70.3 0 ##

0 ##

0.726 #

0 ##

5.77 #

0 ##

4.99 #

62.8 94.2 13.1 #

14.9 #

0 ##

13.0 #

0 ##

81.9

< 0.050

< 0.050 0.052 0.034 J

< 0.050

< 0.070

< 0.070 0.0216 J

< 0.070

< 0.070 5.79 4.19

< 0.070 0.049 J 0.659

< 0.070

< 0.070 0.0936 J 0.183 J

< 0.200

< 0.200 0.983

< 0.200

< 0.200 0.0695 J 0.0865 J 0.101 J

< 0.200

< 0.200 177 130 0.207 1.67 21.6

< 0.200

< 0.200 0.123 J

< 0.200 0.0936 J 0.183 J

< 0.200

< 0.200 1.00

< 0.200

< 0.200 0.0695 J 0.0865 J 0.101 J

< 0.200

< 0.200 183 134 0.207 1.72 22.2

< 0.200

< 0.200 0.123 J

< 0.200 0.02 0.176 0.024 0.166 0.03 1.99 0.111 0.023 0.633 0.033 4.45 0.33 0.321 0.003 0.053 0.035 0.215 1.39 0.081 0.258 0.26 0.062 0.257 0.057 0.18 4.18 0.034 0.036 0.019 0.259 4.27 3.5 4.3 73 4.3 65 4.7 6.3 2.4 0.093 7.8 42 5.3 4.9

< 0.020

< 0.020 0.11 1.3 0.57 2.8 2.8 3.7 4.2 4.6 9.7 14 0.035 2.5 4.0 0.34 42 0.0088 0.0141 0.0218 0.0203 0.0299 0.806 0.0198 0.0186 2.08 0.0129 16.5 0.0446 0.0422 0.0151 0.0097 0.0185 0.256 0.0212 0.0397 0.0037 0.0125 0.0108 0.009 0.0155 18.6 12.3 0.0251 0.0274 0.0162 0.023 16 3.87 J 4.6 J 8.79 J 8.02 J 6.21 J

< 20.0 3.76 J

< 20.0 8.1 J

< 20.0 5.33 J

< 20.0

< 20.0 7.32 J

< 20.0 4.12 J

< 20.0

< 20.0 7.39 J 4.3 J 7.38 J 4.22 J

< 20.0 5.44 J

< 20.0

< 20.0 8.91 J

< 1.0

< 5.0

< 1.0

< 10

< 50

< 10

< 20

< 100

< 20

< 1.0

< 1.0 13

< 1.0 4.4

< 1.0

< 1.0 2.1 2.0

< 1.0

< 1.0 1.0

< 1.0

< 1.0 1.8 290

< 1.0 190

< 1.0

< 1.0 2.5 1.6 200 200

< 1.0

< 1.0 42 1.0 1.3

< 1.0

< 5.0

< 1.0

< 1.0 11 5.2

< 1.0 14

< 1.0

< 1.0 4.9 4.7

< 1.0

< 1.0 1.1

< 1.0

< 5.0

< 1.0

< 1.0 Page 2 of 4

Table 3 - Summary of October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Radiological Alpha particles 15** pCi/L Radiological Beta particles 50** pCi/L Radiological Technetium-99 900 pCi/L Radiological Uranium-234 ug/L Radiological Uranium-235 ug/L Radiological Uranium-238 ug/L Radiological Total Uranium 30 ug/L Chemical Fluoride 4

mg/L Chemical Nitrate as N 10 mg/L Chemical Ammonia mg/L Metals Antimony 6

ug/L VOCs 1,1-Dichloroethene 7

ug/L VOCs 2-Butanone ug/L VOCs Acetone ug/L VOCs cis-1,2-Dichloroethene 70 ug/L VOCs Tetrachloroethene 5

ug/L VOCs trans-1,2-Dichloroethene 100 ug/L VOCs Trichloroethene 5

ug/L VOCs Vinyl chloride 2

ug/L Well Date Type W-65 W-66 W-67 W-68 W-69 W-70 W-71 W-72 W-73 W-74 W-75 W-76 W-77 W-78 W-79 W-80 W-81 W-82 W-83 W-84 W-85 W-86 W-87 W-88 W-89 W-90 W-92 W-93 W-94 W-95 W-96 10/17/2019 10/17/2019 10/18/2019 10/22/2019 10/23/2019 10/23/2019 10/23/2019 10/4/2019 10/4/2019 10/9/2019 10/9/2019 10/5/2019 10/6/2019 10/5/2019 10/7/2019 10/6/2019 10/8/2019 10/8/2019 10/8/2019 10/8/2019 10/23/2019 10/23/2019 10/2/2019 10/22/2019 10/22/2019 10/22/2019 10/10/2019 10/6/2019 10/15/2019 10/15/2019 10/11/2019 N

N N

1.22 #

0 ##

0.945 #

0.922 #

2.31 #

0.0198 #

0.983 #

1.05 #

0.241 #

0 ##

2.10 #

2.77 #

865 0 ##

2.99 #

1.30 #

0 ##

1.37 #

0.300 #

0 ##

1.42 #

0.317 #

1.68 #

2.50 #

0.498 #

0.889 #

1.58 #

3.06 1.14 #

0.695 #

2.51 #

7.14 3.33 #

65.3 2.33 #

1.94 #

1.37 #

8.11 2.74 #

1.85 #

1.29 #

3.89 #

6.88 111 4.12 #

5.90 7.29 1.23 #

4.82 2.75 #

3.97 #

1.23 #

7.12 4.92 2.05 #

0 ##

23.1 3.78 #

8.18 2.48 #

0.814 #

4.36 0 ##

0 ##

84.3 0 ##

0 ##

21.4 #

12.2 #

0 ##

11.5 #

0 ##

101 0 ##

3.52 #

2.56 #

0 ##

0.914 #

0 ##

19.3 #

8.88 #

0.787 #

6.34 #

27.5 #

6.68 #

0 ##

20.4 #

2.35 #

0 ##

< 0.050

< 0.050 0.089

< 0.050

< 0.070

< 0.070 0.0308 J 10.1

< 0.070

< 0.200

< 0.200 0.165 J 0.095 J 0.0831 J

< 0.200

< 0.200 0.915 237 0.0933 J 0.0892 J 0.151 J 0.0728 J 0.151 J

< 0.200 0.0704 J

< 0.200

< 0.200 0.457

< 0.200

< 0.200 0.114 J

< 0.200

< 0.200 0.165 J 0.095 J 0.0831 J

< 0.200

< 0.200 0.946 247 0.0933 J 0.0892 J 0.151 J 0.0728 J 0.151 J

< 0.200 0.0704 J

< 0.200

< 0.200 0.457

< 0.200

< 0.200 0.114 J

< 0.200 0.783 0.076 0.01 0.02 0.022

< 0.100 0.084 0.116 0.071 0.019 0.109 1.45 9.21 13.4 2.4 1.57 0.042 0.046 0.079 0.087 0.23 0.511 0.278 0.012 0.011 0.039 0.099 0.043 0.043 0.077 0.111 0.64 1.5 14 3.0 0.16 1.4 0.021 1.5 2.0 4.9 0.063 9.8 12 3.5 4.0 8.3 3.1 0.99 0.76

< 0.020 0.039

< 0.020 0.055 4.5 2.5 2.3 0.029 5.3

< 0.020 0.024 0.054 0.0489 0.0336 1.31 0.0143 0.0341 0.0077 0.0149 0.275 0.0167 0.159 0.391 0.0154 7.11 0.0271 0.0146 0.0927 0.0762 0.0275 0.0099 0.0119 0.03 0.0073 0.0127 0.0127 0.0132 0.0147 3.19 0.0324 0.246 0.145 0.228

< 20.0

< 20.0 7.15 J 5.12 J 3.54 J 4.18 J 4.12 J 5.99 J 3.53 J 3.58 J 5.15 J 5.32 J

< 20.0 7.19 J

< 20.0

< 20.0 6.48 J

< 20.0 5.21 J

< 20.0

< 20.0 4.77 J

< 20.0

< 1.0

< 5.0

< 1.0

< 10

< 50

< 10

< 20

< 100

< 20

< 20 13 22 1.5

< 1.0

< 1.0 1.0 1.9

< 1.0

< 1.0 2.0

< 1.0

< 1.0 5.3 4.3

< 1.0 220 480 49 110

< 1.0

< 1.0 19

< 1.0

< 1.0 38 4.1 2.1

< 1.0

< 1.0 24

< 1.0

< 5.0

< 1.0

< 1.0 84 8.5 8.4 1.8

< 1.0

< 1.0 4.5

< 1.0 63

< 1.0

< 1.0 11

< 1.0

< 1.0 2.8

< 1.0

< 5.0

< 1.0

< 1.0 2.9

< 1.0 Page 3 of 4

Table 3 - Summary of October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Radiological Alpha particles 15** pCi/L Radiological Beta particles 50** pCi/L Radiological Technetium-99 900 pCi/L Radiological Uranium-234 ug/L Radiological Uranium-235 ug/L Radiological Uranium-238 ug/L Radiological Total Uranium 30 ug/L Chemical Fluoride 4

mg/L Chemical Nitrate as N 10 mg/L Chemical Ammonia mg/L Metals Antimony 6

ug/L VOCs 1,1-Dichloroethene 7

ug/L VOCs 2-Butanone ug/L VOCs Acetone ug/L VOCs cis-1,2-Dichloroethene 70 ug/L VOCs Tetrachloroethene 5

ug/L VOCs trans-1,2-Dichloroethene 100 ug/L VOCs Trichloroethene 5

ug/L VOCs Vinyl chloride 2

ug/L Well Date Type W-97 WSW-01*

WSW-02*

WSW-03*

WSW-04*

10/11/2019 10/15/2019 10/22/2019 10/24/2019 10/24/2019 N

N N

0.168 #

0.599 #

0.876 #

3.63 7.11 11.0 0 ##

8.80 2.05 #

2.69 #

10.3 #

17.4 #

0.279 #

0.857 #

8.56 #

< 0.050

< 0.070

< 0.200 0.272

< 0.200 0.776 0.482

< 0.200 0.272

< 0.200 0.776 0.482 0.375 0.023 0.103 0.013 0.013 3.4 0.020

< 0.020

< 0.020 0.067 4.89 0.0639 0.0273 0.0655 0.0166 3.97 J

< 20.0 5.89 J

< 20.0

< 1.0

< 10

< 20

< 1.0

< 1.0 4.3

< 1.0

< 1.0 1.2

< 1.0

< 1.0 Notes:

- private water supply well groundwater sample

- - site-specific action level N - normal sample FD - field duplicate sample MCL - Maximum Contaminant Level Bold concentrations indicate detections Concentrations in shaded cells exceed their MCL

- value is below minimum detectable concentration

1. - value is reported as a negative number pCi/L - picocuries per liter ug/L - micrograms per liter mg/L - milligrams per liter VOCs - volatile organic compounds J - Estimated result is less than the practical quantitation limit and greater than the method detection limit Page 4 of 4

Table 4 - Summary of Surface Water Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SW-11 SW-12 SW-13 SW-14 SW-16 SW-17 SW-17 SW-18 SW-19 SW-20 SW-21 SW-21 SW-22 SW-22 SW-23 N

N N

N FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/17/2019 7/15/2019 7/17/2019 7/16/2019 Group Analyte MCL Unit Radiological Technetium-99 900 pCi/L 0 ##

0 ##

3.73 #

0 ##

1.29 #

0 ##

NA 0 ##

13.6 #

Radiological Uranium-234 ug/L

< 0.050

< 0.050 NA

< 0.050 Radiological Uranium-235 ug/L

< 0.070

< 0.070 0.0682 J

< 0.070

< 0.070 0.0174 J 0.0274 J

< 0.070 NA

< 0.070 Radiological Uranium-238 ug/L 0.365

< 0.200 0.134 J 0.297 1.71 0.246 0.229 0.304 0.507 1.11 0.16 J NA 0.199 J NA 0.0673 J Radiological Total Uranium 30 ug/L 0.365

< 0.2 0.134 0.297 1.78 0.246 0.229 0.304 0.524 1.14 0.160 NA 0.199 NA 0.0673 Chemical Fluoride 4

mg/L 0.146 0.296 0.226 0.234 1.69 0.460 0.471 0.309 0.154 0.494 0.433 NA 0.432 NA 4.94 Chemical Nitrate as N 10 mg/L

< 0.020

< 0.020 0.63 0.48 3.8 3.8 5.7

< 0.020

< 0.02 NA

< 0.02 NA 7.3 Chemical Ammonia mg/L 0.546 0.228 0.249 0.233 4.35 0.290 0.290 0.208 0.376 0.640 0.244 NA 0.187 NA 0.459 Metals Antimony 6

ug/L

< 20.0

< 20.0 NA

< 20.0 VOCs 1,1-Dichloroethene 7

ug/L

< 1.0

< 1 NA

< 1.0 VOCs 2-Butanone ug/L

< 10

< 10 NA

< 10 VOCs Acetone ug/L

< 20

< 20 NA

< 20 VOCs cis-1,2-Dichloroethene 70 ug/L

< 1.0

< 1 NA

< 1.0 VOCs Tetrachloroethene 5

ug/L

< 1.0

< 1.0 16 16 14

< 1.0

< 1 NA

< 1.0 VOCs trans-1,2-Dichloroethene 100 ug/L

< 1.0

< 1 NA

< 1.0 VOCs Trichloroethene 5

ug/L

< 1.0

< 1.0 1.0 1.0

< 1.0

< 1 NA

< 1.0 VOCs Vinyl chloride 2

ug/L

< 1.0

< 1 NA

< 1.0 Notes:

MCL - Maximum Contaminant Level Bold concentrations indicate detections Concentrations in shaded cells exceed their MCL NA - not analyzed

- value is below minimum detectable concentration

1. - value is reported as a negative number pCi/L - picocuries per liter ug/L - micrograms per liter mg/L - milligrams per liter VOCs - volatile organic compounds Location Sample Type Date Page 1 of 1

Table 5 - Summary of Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SED-11 SED-12 SED-13 SED-14 SED-15 SED-16 SED-17 SED-17 SED-18 SED-19 SED-20 SED-21 SED-22 SED-23 SED-24 SED-25*

SED-26*

SED-27**

SED-28**

SED-29 SED-29 SED-29 SED-30 SED-30 SED-31 SED-31 SED-32 SED-32 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in N

N N

FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/16/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/15/2019 7/16/2019 7/16/2019 7/18/2019 7/18/2019 7/18/2019 7/18/2019 11/20/2019 11/20/2019 11/20/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g 0 ##

0 ##

0.0243 #

5.62 #

4.94 #

7.50 #

0 ##

6.28 #

0 ##

4.12 #

0 ##

50.8 35.8 8.55 #

1.68 #

0 ##

5.75 #

0 ##

2.43 #

0 ##

0.959 #

0 ##

5.06 #

0 ##

Radiological Uranium-233/234 13 3310 pCi/g 1.14 0.925 1.67 1.42 2.58 14.9 0.658 1.07 0.219 32.5 62.5 1.86 117 1.35 1.14 907 222 225 254 6.23 1.81 1.23 5.71 1.41 2.81 2.96 3.71 10.0 Radiological Uranium-235/236 8

39 pCi/g 0.00159 #

0.0647 #

0.156 #

0.0250 #

0.181 0.678 0.0235 #

0.104 #

0.0173 #

2.30 3.12 0.104 #

4.98 0.00261 #

0.0608 #

41.1 11.0 11.9 12.4 0.313 0.208 0.175 0.191 0.0337 #

0.0669 #

0.110 #

0.0970 #

0.469 Radiological Uranium-238 14 179 pCi/g 0.742 1.17 1.33 0.389 2.05 2.77 0.302 0.354 0.298 8.18 14.9 1.96 28.0 1.69 0.944 149 46.9 37.4 44.6 2.51 1.55 1.16 2.51 1.28 1.75 1.69 2.00 3.28 Radiological Uranium-234 ug/kg

< 25.7

< 25.6

< 15.4

< 12.1

< 12.4

< 12.0

< 11.0

< 11.8

< 12.0 4.27 J 12.7 J

< 30.8 22 J

< 14.4

< 15.9 225 129 38.9 J 57.2 J

< 24.3

< 18.4

< 15.1

< 20.4

< 21.1

< 14.5

< 12.4

< 19.9

< 18.4 Radiological Uranium-235 ug/kg 11.5 J 16 J 13.8 J 5.32 J 51.2 114 6.57 J 2.9 J 5 J 451 1310 27.8 J 2230 18.3 J 15.9 J 27100 14200 3970 6770 86.4 21.4 J 17.6 J 85.9 21 J 45.6 18.1 72.9 195 Radiological Uranium-238 ug/kg 1320 1700 1360 260 5790 3310 401 140 265 16200 49700 2840 80700 2250 1680 646000 487000 90900 161000 6030 2490 2490 5410 2690 3400 2220 4280 8370 Radiological Total Uranium Isotopes ug/kg 1330 1720 1370 265 5840 3420 408 143 270 16700 51000 2870 83000 2270 1700 673000 501000 94900 168000 6120 2510 2510 5500 2710 3450 2240 4350 8570 Chemical Fluoride mg/kg 1.35 J 2.26 J 1.45 J

< 1.21 2.09 8.73 0.908 J 0.814 J

< 1.22 3.51 15.7 2.17 J 4.64 38.1 49.2 53.3 4.61 171 39.3 1.14 J 2.56 2.61 2.26 3.43 3.13 3.07 3.88 4.21 Chemical Nitrate as N mg/kg 0.33 0.24 0.2

< 0.2

< 0.20 2.7 2.1 0.95

< 0.20 1.2

< 0.20

< 0.2

< 0.20 0.20 0.27 1.4 0.30

< 0.20

< 0.50

< 0.50 NA

< 0.50

< 0.50 1.1

< 0.50 Chemical Ammonia mg/kg 723 560 98.5 6.43 49.0 13.5 4.15 3.66 3.48 401 1600 532 978 214 70.5 2270 167 395 1560 455 287 230 394 392 286 118 480 576 Metals Antimony mg/kg

< 5.29

< 4.93

< 3 0.511 J

< 2.42 0.447 J 0.482 J 0.512 J

< 2.53

< 3.75

< 11.7

< 6

< 6.26

< 2.87

< 2.94 5.01 J 1.22 J 4.79 J 6.81 J

< 4.85

< 3.53

< 2.97

< 4.08

< 4.41

< 28.4

< 25.6

< 4.15

< 3.44 VOCs 1,1-Dichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 VOCs 2-Butanone ug/kg

< 25 180

< 24

< 17

< 15

< 16

< 19

< 18 45 45

< 25 32

< 28

< 17 NA NA NA NA

< 21

< 18

< 24 26 25

< 16

< 17 38 76 VOCs Acetone ug/kg 32 110 30 28

< 15

< 16

< 19

< 18 48 110 67 88 91 25 NA NA NA NA 410 420 370 380 530 410 440 450 440 VOCs cis-1,2-Dichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 VOCs Tetrachloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1 5.5

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 VOCs Toluene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 VOCs trans-1,2-Dichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 VOCs Trichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 VOCs Vinyl chloride ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4 Location Depth Type Date Page 1 of 3

Table 5 - Summary of Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Radiological Uranium-234 ug/kg Radiological Uranium-235 ug/kg Radiological Uranium-238 ug/kg Radiological Total Uranium Isotopes ug/kg Chemical Fluoride mg/kg Chemical Nitrate as N mg/kg Chemical Ammonia mg/kg Metals Antimony mg/kg VOCs 1,1-Dichloroethene ug/kg VOCs 2-Butanone ug/kg VOCs Acetone ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs Toluene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date SED-33 SED-33 SED-33 SED-34 SED-34 SED-35 SED-35 SED-36 SED-36 SED-37 SED-37 SED-37 SED-38 SED-39 SED-40 SED-41 SED-42 SED-43 SED-44 SED-45 SED-46 SED-47 SED-48 SED-48 SED-49 SED-50 0 - 6 in 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 6 - 12 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N N

FD N

N N

FD N

N 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/26/2019 11/26/2019 11/26/2019 11/26/2019 11/26/2019 0 ##

0 ##

16.5 #

0 ##

0.995 #

5.94 #

0 ##

6.23 #

2.83 #

0 ##

0.910 #

5.06 1.27 1.06 3.13 2.93 2.26 1.59 4.40 1.50 4.88 2.04 2.33 3.26 1.86 1.90 1.72 6.12 47.5 8.86 5.86 4.02 3.18 2.57 2.43 4.59 3.64 0.394 0.0959 #

0.0461 #

0.131 #

0.0487 #

0.179 0.0433 #

0.210 0.0881 0.254 0.149 0.0456 #

0.204 0.0122 #

0.131 0.0394 #

0.285 2.32 0.377 0.268 0.179 0.232 0.0910 #

0.0144 #

0.215 0.104 #

2.52 1.56 1.09 1.81 1.73 1.59 1.66 2.38 1.05 1.78 1.62 1.38 1.68 1.70 1.24 1.41 2.23 12.1 2.62 2.20 2.15 1.46 1.98 1.62 2.11 1.86

< 16.5

< 14.7

< 14.1

< 17.6

< 16.3

< 14.0

< 13.2

< 14.2

< 13.5

< 15.9

< 14.5

< 15.0

< 34.6

< 15.9

< 17.4

< 26.9

< 52.5

< 55.9

< 32.5

< 34.5

< 30.6

< 41.0

< 25.8

< 29.6

< 37.2

< 31.4 305 21.8 16.5 J 44.9 36.3 36.8 28.9 70.2 19.1 102 67.4 31.7 31.8 J 26.4 28.4 17.8 J 156 862 238 100 48.9 44 J 40.3 37.4 J 81.9 72.1 14200 2750 2230 3650 3770 3920 3630 3970 1990 4850 3930 2910 3380 3040 3020 2390 7220 31300 9690 4920 3190 2560 3140 2650 4840 4470 14500 2770 2250 3690 3810 3960 3660 4040 2010 4950 4000 2940 3410 3070 3050 2410 7380 32200 9930 5020 3240 2600 3180 2690 4920 4540 1.57 J 1.56 6.63 2.20 4.26 2.09 4.29

< 1.44

< 1.32 1.35 J 1.60 0.858 J 5.17 1.90 1.65 J 2.68 J 5.15 J 14.9 3.04 J 7.90 3.41 6.02 2.94 3.46 5.44 4.67

< 0.50

< 0.50 NA 0.62

< 0.50

< 0.50 0.55

< 0.50

< 0.50 0.66

< 0.5

< 0.50 0.63 0.83 0.50

< 0.50 0.82 0.62 0.59 0.63 0.70 0.58 0.53 248 117 67.3 397 336 158 80.1 153 99.1 451 127 178 576 222 242 466 928 774 389 586 371 1540 806 1080 209 750

< 35.6

< 30.3

< 2.73

< 3.59

< 32.8

< 29.9

< 28

< 2.89

< 26.9

< 3.27

< 28.3

< 30

< 6.96

< 3.32

< 3.48

< 5.62

< 10.3

< 11.5

< 7.06

< 6.5

< 6.1

< 8.72

< 5.01

< 5.68

< 7.62

< 6.52

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3

< 20 45 NA 28 28

< 18

< 17

< 18

< 20

< 18

< 24

< 19

< 21

< 26

< 27

< 29

< 29 29

< 26 160 39 23

< 28 190 490 400 NA 200 180 390 310 370 350 300 350 360 400

< 19 260 96 59 79 57 130 110 410 220 280 300 370

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 6.3 Page 2 of 3

Table 5 - Summary of Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Radiological Uranium-234 ug/kg Radiological Uranium-235 ug/kg Radiological Uranium-238 ug/kg Radiological Total Uranium Isotopes ug/kg Chemical Fluoride mg/kg Chemical Nitrate as N mg/kg Chemical Ammonia mg/kg Metals Antimony mg/kg VOCs 1,1-Dichloroethene ug/kg VOCs 2-Butanone ug/kg VOCs Acetone ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs Tetrachloroethene ug/kg VOCs Toluene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs Trichloroethene ug/kg VOCs Vinyl chloride ug/kg Location Depth Type Date SED-51 SED-51 SED-52 SED-52 SED-53 SED-53 SED-54 SED-54 SED-55 SED-55 SED-56 SED-56 SED-56 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 0 - 6 in 6 - 12 in N

N N

FD N

11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 0 ##

4.89 #

0 ##

1.51 #

0 ##

6.19 #

0 ##

2.53 #

0 ##

2.10 1.27 1.77 1.88 2.15 2.06 1.78 1.48 2.05 1.62 2.02 2.82 1.89 0.178 #

0.0695 #

0.308 #

0.0494 #

0.194 0.0708 #

0.119 #

0.120 #

0 ##

0.155 0.214 0.115 #

0.0276 #

1.42 1.15 1.72 1.45 1.45 2.34 1.36 1.87 1.74 1.62 1.40 2.11 1.72

< 31.2

< 28.9

< 21.8

< 23.3

< 17.3

< 14.1

< 37.1

< 25.3

< 18.3

< 16.0

< 17.2

< 18.8

< 16.4 28.2 J 20.6 J 26.8 J 29.5 J 29.2 24.7 22.6 J 26 J 25.4 J 23.2 23 J 24.5 J 21.7 J 2610 2450 2530 2690 3200 3290 2870 2990 3450 3230 3100 3440 2970 2640 2470 2560 2720 3230 3310 2890 3020 3480 3250 3120 3460 2990 2.77 J 2.96 1.48 J 1.69 J 0.838 J 0.607 J 1.93 J 1.01 J

< 1.88

< 1.76

< 1.89

< 1.96 0.690 J 0.72 0.51

< 0.50 0.61

< 0.50

< 0.50 0.63 0.68

< 0.50

< 0.50 0.52 0.74

< 0.50 692 401 465 271 387 196 854 536 321 223 449 325 244

< 5.8

< 5.66

< 4.58

< 4.27

< 3.46

< 31.3

< 7.44

< 5.3

< 3.66

< 3.04

< 3.6

< 3.47

< 3.26

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5 43

< 27 31

< 26

< 22

< 21 42

< 25

< 19

< 20

< 21

< 19

< 14 330 180 100

< 26

< 22 170 330 39

< 19 200 220 23

< 14

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5 8.7

< 6.7 10

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5 Notes:

N - normal sample FD - field duplicate sample RUSL - Residential Use Screening Level (NUREG 1757, Appendix H)

IUSL - Industrial Use Screening Level (NUREG 1757, Appendix H)

Bold concentrations indicate detections Concentrations in shaded cells exceed their RUSL/IUSL NA - not analyzed

- value is below minimum detectable concentration

1. - value is reported as a negative number pCi/g - picocuires per gram ug/kg - micrograms per kilogram mg/kg - milligrams per kilogram SVOCs - semivolatile organic compounds VOCs - volatile organic compounds

- sludge sample collected from the Sanitary Lagoon

- - sludge sample collected from the East Lagoon J - Estimated result is less than the practical quantitation limit and greater than the method detection limit Page 3 of 3

Table 6 - Summary of Soil Technetium-99 Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Sample ID Sample Depth (feet bgs)

Collection Date Result (pCi/g) 19 89,400 SS-1 0-1 8/15/19 0.171 #

SS-1 1-3 8/15/19 4.39 #

SS-1 3-5 8/15/19 0.00 ##

SS-1 5-7 8/15/19 0.00 ##

SS-2 0-1 8/14/19 0.00 ##

SS-2 1-3 8/14/19 9.60 #

SS-2 3-5 8/14/19 4.78 #

SS-2 5-7 8/14/19 4.02 #

SS-3 0-1 8/14/19 12.9 #

SS-3 1-3 8/14/19 4.83 #

SS-3 3-5 8/14/19 0.00 ##

SS-3 5-7 8/14/19 3.12 #

SS-3-DUP 5-7 8/14/19 1.35 #

SS-4 0-1 8/14/19 2.35 #

SS-4 1-3 8/14/19 16.1 #

SS-4 3-5 8/14/19 7.72 #

SS-4 5-7 8/14/19 0.00 ##

SS-5 0-1 8/14/19 0.637 #

SS-5 1-3 8/14/19 0.00 ##

SS-5 3-5 8/14/19 4.46 #

SS-5 5-7 8/14/19 0.843 #

SS-6 0-1 8/14/19 7.58 #

SS-6 1-3 8/14/19 0.00 ##

SS-6 3-5 8/14/19 0.00 ##

SS-6 5-7 8/14/19 0.00 ##

SS-7 0-1 8/13/19 8.60 #

SS-7 1-3 8/13/19 0.00 ##

SS-7 3-5 8/13/19 0.00 ##

SS-7 5-7 8/13/19 0.00 ##

SS-8 0-1 8/13/19 0.00 ##

SS-8 1-3 8/13/19 5.52 #

SS-8 3-5 8/13/19 1.09 #

SS-8 5-7 8/13/19 0.00 ##

SS-9 0-1 8/13/19 0.00 ##

SS-9 1-3 8/13/19 0.00 ##

SS-9 3-5 8/13/19 0.572 #

SS-9 5-7 8/13/19 18.1 #

SS-10 0-1 8/13/19 0.00 ##

SS-10 1-3 8/13/19 0.00 ##

SS-10 3-5 8/13/19 0.00 ##

SS-10 5-7 8/13/19 0.00 ##

SS-11 0-1 8/12/19 9.64 #

SS-11 1-3 8/12/19 0.00 ##

SS-11 3-5 8/12/19 14.3 #

SS-11 5-7 8/12/19 17.3 #

Residential Use Screening Level Industrial Use Screening Level Page 1 of 2

Table 6 - Summary of Soil Technetium-99 Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Sample ID Sample Depth (feet bgs)

Collection Date Result (pCi/g) 19 89,400 Residential Use Screening Level Industrial Use Screening Level SS-12 0-1 8/12/19 8.88 #

SS-12 1-3 8/12/19 8.02 #

SS-12 3-5 8/12/19 10.0 #

SS-12 5-7 8/12/19 6.76 #

SS-13 0-1 8/12/19 5.42 #

SS-13 1-3 8/12/19 11.0 #

SS-13 3-5 8/12/19 2.05 #

SS-13 5-7 8/12/19 3.31 #

SS-13-DUP 5-7 8/12/19 21.6 #

SS-14 0-1 8/13/19 4.80 #

SS-14 1-3 8/13/19 1.57 #

SS-14 3-5 8/13/19 4.99 #

SS-14 5-7 8/13/19 0.00 ##

SS-14-DUP 5-7 8/13/19 9.42 #

Notes:

bgs - below ground surface pCi/g - picocuries per gram

- value is below minimum detectible concentration

1. - value is reported as a negative number DUP - field duplicate sample Concentrations in shaded cells exceed their RUSL Page 2 of 2

Table 7 - Summary of Hydraulic Characteristic Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC cm/sec ft/day cm/sec ft/day F

3.46E-03 9.80 R

3.56E-03 10.09 F

1.96E-03 5.56 R

1.95E-03 5.53 F

1.17E-03 3.33 R

9.80E-04 2.78 F

2.12E-04 0.60 R

1.83E-04 0.52 F

4.71E-02 133.70 R

4.11E-02 116.70 F

1.79E-03 5.09 R

1.82E-03 5.15 F

1.65E-03 4.67 R

2.09E-03 5.94 F

2.11E-02 59.84 R

9.19E-03 26.05 F

1.45E-02 41.19 R

2.68E-02 75.97 F

2.75E-02 78.00 R

2.92E-02 82.89 1.65E-02 46.82 Notes:

F - Falling Head Test R - Rising Head Test cm/sec - centimeters per second ft/day - feet per day

- slug tests conducted during a previous phase of work in upper and lower surficial aquifer wells but not previously reported W-96 2.07E-02 58.58 W-97 2.84E-02 80.45 9.95 W-13R*

W-15*

W-39*

Well Number Test Type Hydraulic Conductivity (K)

Average Hydraulic Cond. (K) 1.96E-03 5.55 1.08E-03 3.06 3.51E-03 5.31 Average Conductivity - Floodplain Aquifer 0.56 4.41E-02 125.20 1.81E-03 5.12 W-48*

W-60*

W-61*

W-94 1.97E-04 1.87E-03 W-95 1.51E-02 42.95 Page 1 of 1

Table 8 - Summary of Private Water Supply Well Survey Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Map ID Address/Designation Latitude Longitude Richland County Tax Map ID #

1 150 Hopkins Park Road R21400-01-11 2

7028 Lower Richland Blvd R21400-01-27 3

7040 Lower Richland Blvd R21400-01-39 4

7048 Lower Richland Blvd R21400-01-16 5

7064 Lower Richland Blvd R21400-01-30 6

7071 Lower Richland Blvd R21400-02-65 7

7072 Lower Richland Blvd R21400-01-17 8

7131 Lower Richland Blvd R21400-02-61 9

7152 Lower Richland Blvd R21400-01-24 10 5943 Bluff Road R21400-03-09 11 6001 Bluff Road R21400-03-02 12 6041 Bluff Road R21400-03-05 13 6045 Bluff Road R21400-03-06 14 1012 Coley Road R18705-01-05 15 1109 Coley Road R18800-02-18B Page 1 of 2

Table 8 - Summary of Private Water Supply Well Survey Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Map ID Address/Designation Latitude Longitude Richland County Tax Map ID #

16 1113 Coley Road R18700-03-04 17 1122 Coley Road R18705-01-08 18 1243 Coley Road R18706-02-02 19 1249 Coley Road R18706-02-03 20 1249 Coley Road R18706-02-04 21 109 Nicie Byrd Way R18800-02-19 22 117 Nicie Byrd Way R18800-02-50 23 125 Nicie Byrd Way R18800-02-49 24 133 Nicie Byrd Way R18800-02-48 25 100 Pincushion Road R18700-04-09 26 WSW-01 33.8892625

-80.93917313 R15900-01-06 27 IWSW-01 33.88717942

-80.92577294 R15900-01-06 28 IWSW-02 33.88875406

-80.92383756 R15900-01-06 31 WSW-02 33.85836279

-80.9297476 R18500-01-02 29 WSW-03 33.87559353

-80.94351638 R15700-01-01 30 WSW-04 33.84324651

-80.93413056 R15600-01-02 Page 2 of 2

Dominion Energy Substation CFFF 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 CCS February 2020 FIGURE 1 q

0 4,000 2,000 Feet 1:48,000 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Data Source: Esri/USGS WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Site Location Map Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_1_sitelocationmap.mxd

^_

Legend Locations Property Line SCRDI Bluff Road (Superfund Site)

Topographic Quadrangle Boundary 1

2 3

4 5

6 Southwest Columbia Gaston Fort Jackson South Saylors Lake Congaree Gadsden ID Topographic Quadrangle Name 1

2 4

3 5

6

?

A A

A@

A A

")

Plant Building WL2 WL1 SAN NL EL SL Gator Pond Culvert Eastern Ditch Dominion Energy Substation Western Ditch Middle Ditch Former Oil House W-11 W-27 W-32 W-3A W-4 W-42 W-47 W-49 W-64 W-61 W-60 W-69 W-70 W-71 W-85 W-86 W-90 W-92 W-91 RW-2R W-10 W-13R W-14 W-15 W-16 W-19B W-20 W-23R W-24 W-26 W-33 W-36 W-39 W-41R W-43 W-44 W-46 W-48 W-7A W-62 W-63 W-67 W-68 W-88 W-89 W-97 W-96 W-95 W-94 W-25 Creek Upper Gator Lower 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 CCS June 2020 FIGURE 2 q

0 600 300 Feet 1:7,200 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Site Map Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_2_SiteMap.mxd Legend East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon I West Lagoon II EL NL SL SAN WL1 WL2 Groundwater Monitoring Wells Upper Surficial Aquifer Lower Surficial Aquifer Black Mingo Aquifer A

A A

?

Ditch Culvert Upper Sunset Lake Lower Sunset Lake Mill Creek Upper Floodplain Well A

SCRDI Bluff Road (Superfund Site)

Mill Creek Flow Direction Mill Creek Property Line Dike Location

?

A A

Plant Building WL2 WL1 SAN NL EL SL W-75 W-78 W-77 W-66 W-65 W-59 W-58 W-57 W-56 W-55 W-54 W-53 W-52 W-51 W-7A W-6 W-50 W-45 W-43 W-40 W-39 W-38 W-37 W-36 W-35 W-33 W-30 W-29 W-28 W 10 RW-1 W-22 W-18R W-17 W-72 W-73 W-74 W-93 W-79 W-80 W-81 W-82 W-83 W-84 W-87 W-86 W-76 Staff Gauge Location

")

Lower Floodplain Well A

Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Lower Sunset Dike Upper Sunset Dike

W-14 120.14' W-15 115.00' W-16 121.31' W-32 121.02' W-61 121.64' W-62 (114.79')

W-64 115.50' W-67 115.72' W-70 (126.12')

W-85 (116.68')

W-89 120.72' W-91 115.25' W-92 (105.56')

W-10 120.31' W-11 (121.74')

W-13R 123.17' W-19B (117.68')

W-23R 121.28' W-24 130.16' W-27 110.59' W-33 (123.48')

W-36 127.63' W-39 124.90' W-4 (105.71')

W-41R 117.87' W-42 114.64' W-43 (125.68')

W-44 (116.44')

W-46 120.72' W-47 (114.91')

W-48 (115.35')

W-60 (118.08')

W-63 (113.71')

W-69 130.89' W-7A 122.71' W-86 (118.18')

W-88 (119.68')

W-90 (115.95')

W-68 (108.63')

W-94 (105.90')

W-97 109.50 W-26 115.84 Gator (117.16')

W-RW2 (121.31')

W-95 (105.69')

W-96 105.38' W-20 105.56' W-25 104.93' Upper (109.01')

Lower (108.65')

Creek (105.69')

110 130 115 125 120 105 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM June 2020 FIGURE 3 q

0 600 300 Feet 1:7,200 Map Projection: North American Datum (NAD) 1983, South Carolina State Plane, FIPS 3900, Feet WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Potentiometric Map - Upper Surficial/Upper Floodplain Aquifers Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_3_Pot-Oct2019_rev20200624.mxd 124.90' Groundwater Elevation (127.46') Elevation for illustrative purposes only Based upon data from October 14, 2019 Legend East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon I West Lagoon II EL NL SL SAN WL1 WL2 Groundwater Monitoring Wells Upper Sunset Lake Lower Sunset Lake Mill Creek Plant Building WL2 WL1 SAN NL EL SL W-6 (125.24')

W-45 127.17' W-52 127.04' W-54 126.99' W-55 126.91' W-57 126.76' W-58 125.74' W-59 125.65' W-66 127.19' W-75 126.79' W-76 127.57' W-77 126.55' W-78 126.26' W-80 124.79' W-81 124.41' W-82 123.51' W-RW1 (127.31')

W-17 (124.71')

W-18R (124.51')

W-22 124.83' W-28 126.28' W-29 126.20' W-30 126.16' W-35 127.29' W-37 126.99' W-38 126.06' W-40 127.31' W-51 127.24' W-53 127.12' W-56 126.93' W-65 (126.88')

W-72 127.05' W-73 126.84' W-74 (126.47')

W-79 127.06' W-83 121.86' W-84 127.54' W-87 (127.46')

W-93 (126.07')

Lower Sunset Dike Upper Sunset Dike Lower Floodplain Well A

Upper Floodplain Well A

Black Mingo Aquifer A

Lower Surficial Aquifer A

Upper Surficial Aquifer A

Direction of Groundwater Potentiometric Line (C.I. = 5 feet, dashed where inferred)

Mill Creek Flow Direction SCRDI Bluff Road (Superfund Site)

Property Line Mill Creek Culvert

?

Ditch Inferred Top of Bluff Top of Bluff Staff Gauge Location

")

Dike Location Secondary Bluff Area Inferred Bottom of Bluff Bottom of Bluff

A A

Plant Building WL2 WL1 SAN NL SL EL Gator Pond Lower Sunset Lake Upper Sunset Lake W-50 114.31 W-71 114.74 W-3A 111.29' W-49 109.18' 110 114 112 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 LJG FIGURE 4 q

0 500 250 Feet 1:6,000 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_4_BlackMingo_Pot-Oct2019.mxd Groundwater Elevation East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 114.74' EL NL SL SAN WL1 WL2 Note:

Based upon data collected on October 14, 2019 Legend Direction of Groundwater Flow

?

Ditch Culvert Potentiometric Line (C.I. = 2 feet)

Groundwater Elevation 114.74' June 2020 Potentiometric Map - Black Mingo Aquifer A

Black Mingo Aquifer Monitoring Well Location

?

!(

Upper Sunset Lake Dike Lower Sunset Lake Dike Mill Creek WL2 WL1 SAN NL SL Gator Pond Lower Sunset Lake Upper Sunset Lake Plant Building EL L-1 L-10 L-11 L-12 L-13 L-14 L-15 L-16 L-17 L-18 L-19 L-2 L-3 L-4 L-5 L-6 L-7 L-8 L-9 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 LJG FIGURE 5 q

0 500 250 Feet 1:6,000 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Lithologic Boring Locations Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_5_LithologicBoringLocations.mxd Legend

?

Ditch Culvert Property Line Lithologic Boring Locations

!(

East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 EL NL SL SAN WL1 WL2 Mill Creek Flow Direction Mill Creek Dike Location Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area June 2020

Plant Building WL2 WL1 SAN NL SL EL Gator Pond W-66 480 W-72

< 1.0 W-73

< 1.0 W-79

< 1.0 W-83

< 1.0 W-86

< 1.0 W-10

< 1.0/< 1.0 W-13R 15 W-14 1.1 W-15 12 W-16 7.8 W-22

< 1.0 W-23R

< 1.0 W-26

< 1.0 W-27

< 1.0 W-28

< 1.0 W-29

< 1.0 W-30

< 1.0 W-32 1.4 W-35 2.6 W-36

< 1.0 W-37

< 1.0 W-38 1.8 W-39 290 W-4

< 1.0 W-40

< 1.0 W-41R 190 W-42

< 1.0 W-43

< 1.0 W-45

< 1.0 W-46 2.5 W-51

< 1.0 W-52

< 1.0 W-53

< 1.0 W-54

< 1.0/< 1.0 W-55

< 1.0 W-56

< 1.0 W-57

< 1.0 W-58

< 1.0 W-59

< 1.0 W-61

< 1.0 W-64 1.3 W-67 49 W-69

<1.0 W-75

< 1.0 W-76

< 1.0 W-77

< 1.0 W-78

< 1.0 W-7A 1.9 W-80

< 1.0 W-81

< 1.0 W-82

< 1.0 W-84

< 1.0 W-89 2.1 W-11 1.4 W-20

<1.0 W-97 4.3 W-96

<1.0 W-91 NS 5

5 1

1 1

101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Extent of PCE - Upper Aquifers Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_6_PCE_UpperSurf_Oct2019.mxd PCE Concentration in µg/L Not Sampled East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 480 NS EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Legend Upper Surficial Aquifer Monitoring Well Location Upper Floodplain Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Mill Creek Flow Direction Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area PCE Isoconcentration Contour (µg/L)

PCE Inferred Isoconcentration Contour (µg/L)

PCE Isoconcentration Contour at a Concentration Less Than the Maximum Contaminant Level (µg/L)

PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 6 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond 5

Denley Cemetery W-17 4.3 W-19B 150 W-33 300/330 W-44

< 1.0 W-47 1.6 W-48 200/200 W-6 16 W-60

< 1.0 W-62 42 W-63 1.0 W-65 220 W-70

<1.0 W-74 19 W-87 38 W-88 4.1 W-90

< 1.0 W-92

< 1.0 W-93 24 W-RW1 1.4 W-RW2 140 W-18R 3.5 W-85

<1.0 W-68 110 W-95

<1.0 W-94

<1.0 5

5 5

1 1

5 1

101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_7_PCE_LowerSurf_Oct2019.mxd PCE Concentration in µg/L East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 300 EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Extent of PCE - Lower Aquifers Legend Lower Surficial Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area PCE Isoconcentration Contour (µg/L)

PCE Inferred Isoconcentration Contour (µg/L)

PCE Isoconcentration Contour at a Concentration Less Than the Maximum Contaminant Level (µg/L)

PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 7 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond W-38 11 W-66 8.5 W-72

< 1.0 W-73

< 1.0 W-75

< 1.0 W-77

< 1.0 W-79

< 1.0 W-83

< 1.0 W-86

< 1.0 W-10

< 1.0/< 1.0 W-13R 1.4 W-14

< 1.0 W-15 2.0 W-16 2.2 W-22

< 1.0 W-23R

< 1.0 W-26

< 1.0 W-27

< 1.0 W-28

< 1.0 W-29

< 1.0 W-30

< 1.0 W-32

< 1.0 W-35

< 1.0 W-36

< 1.0 W-37

< 1.0 W-39 5.2 W-4

< 1.0 W-40

< 1.0 W-41R 14 W-42

< 1.0 W-43

< 1.0 W-45

< 1.0 W-46

< 1.0 W-51

< 1.0 W-52

< 1.0 W-53

< 1.0 W-54

< 1.0/< 1.0 W-55

< 1.0 W-56

< 1.0 W-57

< 1.0 W-58

< 1.0 W-59

< 1.0 W-61

< 1.0 W-64

< 1.0 W-67 8.4 W-69

< 1.0 W-76 63 W-78

< 1.0 W-7A

< 1.0 W-80

< 1.0 W-81

< 1.0 W-82

< 1.0 W-84

< 1.0 W-89

< 1.0 W-11

< 1.0 W-20

<1.0 W-97 1.2 W-96

<1.0 W-91 NS 5

5 1

1 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_8_TCE_UpperSurf_Oct2019.mxd TCE Concentration in µg/L East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 63 EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Extent of TCE - Upper Aquifers Legend Upper Surficial Aquifer Monitoring Well Location Upper Floodplain Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area TCE Isoconcentration Contour (ug/L)

TCE Inferred Isoconcentration Contour (ug/L)

TCE Isoconcentration Contour at a Concentration Less Than the Maximum Contaminant Level (ug/L)

PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 8 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond Lower Sunset Lake Upper Sunset Lake W-18R

< 1.0 W-17

< 1.0 W-19B 2.5 W-33 38/24 W-44

< 1.0 W-47

< 1.0 W-48 4.9/4.7 W-6 2.5 W-60

< 1.0 W-62

< 1.0 W-63 1.1 W-65 84 W-70

< 1.0 W-74 4.5 W-87 11 W-88

< 1.0 W-90

< 1.0 W-92

< 1.0 W-93 2.8 W-RW1

< 1.0 W-RW2 8.3 W-85

< 1.0 W-68 1.8 W-95

<1.0 W-94

<1.0 5

1 1

101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 9 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_9_TCE_LowerSurf_Oct2019.mxd TCE Concentration in µg/L East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 84 EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 June 2020 Extent of TCE - Lower Aquifers Legend Lower Surficial Aquifer Monitoring Well Location Lower Floodplain Aquifer Monitoring Well Location Ditch Culvert Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area TCE Isoconcentration Contour (ug/L)

TCE Inferred Isoconcentration Contour (ug/L)

TCE Inferred Isoconcentration Contour at a Concentration Less Than the Maximum Contamminant Level (ug/L)

Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond W-32 170 W-38 4.3 W-4 0.023 W-49

< 0.020/< 0.020 W-50

< 0.020 W-54 2.8/2.8 W-6 210 W-64 42 W-65 0.64 W-70 1.4 W-72 1.5 W-73 2.0 W-75 0.063 W-77 12 W-79 4.0 W-83 0.76 W-86

< 0.020 W-89 2.5 W-93 5.3 W-RW1 2.1 W-10 37/37 W-11 56 W-13R 18 W-14 0.061 W-15 35 W-16 3.2 W-17 16 W-18R 770 W-19B 3.8 W-20

< 0.020 W-22 100 W-23R 0.71 W-26 3.2 W-27

< 0.020 W-28 6.3 W-29 11 W-30 120 W-33 13/13 W-35 3.2 W-36 0.11 W-37 3.5 W-39 73 W-3A

< 0.020 W-40 4.3 W-41R 65 W-42 4.7 W-43 6.3 W-44 2.4 W-45 0.093 W-46 7.8 W-47 42 W-48 5.3/4.9 W-51 0.11 W-52 1.3 W-53 0.57 W-55 3.7 W-56 4.2 W-57 4.6 W-58 9.7 W-59 14 W-60 0.035 W-61 2.5 W-62 4.0 W-63 0.34 W-66 1.5 W-67 14 W-68 3.0 W-69 0.16 W-71 0.021 W-74 4.9 W-76 9.8 W-78 3.5 W-7A 390 W-80 8.3 W-81 3.1 W-82 0.99 W-84

< 0.020 W-85 0.039 W-87 0.055 W-88 4.5 W-90 2.3 W-92 0.029 W-94

< 0.020 W-95 0.024 W-96 0.054 W-97 3.4 W-RW2 20 W-91 NS 10 10 1

1 0.20 1

101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_10_Nitrate_Oct2019.mxd Nitrate Concentration in mg/L Not Sampled East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 770 NS EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Extent of Nitrate in Groundwater Nitrate Isoconcentration Contour (mg/L)

Nitrate Inferred Isoconcentration Contour (mg/L)

Nitrate Isoconcentration Contour at a Concentration Less Than the Maximum Contaminant Level (mg/L)

Legend Upper Surficial Aquifer Monitoring Well Location Lower Surficial Aquifer Monitoring Well Location Black Mingo Aquifer Monitoring Well Location Upper Floodplain Aquifer Monitoring Well Location Lower Floodplain Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 10 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond W-RW2 0.099 W-91 NS W-32 3.66 W-38 0.176 W-4 4.86 W-49 0.003/0.053 W-50 0.035 W-6 0.126 W-64 4.27 W-65 0.783 W-70

< 0.100 W-72 0.116W-73 0.071 W-75 0.109 W-77 9.21 W-79 2.4 W-83 0.079 W-86 0.511 W-89 0.011 W-92 0.099 W-93 0.043 W-RW1 0.055 W-10 3.32/3.25 W-11 0.021 W-13R 8.11 W-14 0.079 W-15 1.88 W-16 9.5 W-17 2.22 W-18R 6.34 W-19B 0.019 W-20 0.077 W-22 5.52 W-23R 0.017 W-26 1.42 W-27 3.97 W-28 5.45 W-29 4.8 W-30 8.06 W-33 0.152/0.136 W-35 0.025 W-36 0.007 W-37 0.02 W-39 0.024 W-3A 0.015 W-40 0.166 W-41R 0.03 W-42 1.99 W-43 0.111 W-44 0.023 W-45 0.633 W-46 0.033 W-47 4.45 W-48 0.33/0.321 W-51 0.215 W-52 1.39 W-53 0.081 W-54 0.258/0.26 W-55 0.062 W-56 0.257 W-57 0.057 W-58 0.18 W-59 4.18 W-60 0.034 W-61 0.036 W-62 0.019 W-63 0.259 W-66 0.076 W-67 0.01 W-68 0.02 W-69 0.022 W-71 0.084 W-74 0.019 W-76 1.45 W-78 13.4 W-7A 6.47 W-80 1.57W-81 0.042 W-82 0.046 W-84 0.087 W-85 0.23 W-87 0.278 W-88 0.012 W-90 0.039 W-94 0.043 W-95 0.077 W-96 0.111 W-97 0.375 4

1 4

1 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_11_Fluoride_Oct2019.mxd Fluoride Concentration in mg/L Not Sampled East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 13.4 NS EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Extent of Fluoride in Groundwater Legend Upper Surficial Aquifer Monitoring Well Location Lower Surficial Aquifer Monitoring Well Location Black Mingo Aquifer Monitoring Well Location Upper Floodplain Aquifer Monitoring Well Location Lower Floodplain Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Fluoride Isoconcentration Contour (mg/L)

Fluoride Inferred Isoconcentration Contour (mg/L)

Fluoride Isoconcentration Contour Depression (mg/L)

Fluoride Isoconcentration Contour at a Concentration Less Than the Maximum Contaminant Level (mg/L)

PROJECT NO.

PREPARED BY:

DATE:

60595649 LJG FIGURE 11 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond W-91 NS W-92 0##

W-40 0##

W-61 0##

W-65 0##

W-54 0##/0##

W-82 0##

W-84 0##

W-96 0##

W-20 0##

W-23R 0##

W-33 0##/0##

W-41R 0##

W-43 0##

W-44 0##

W-50 0##

W-60 0##

W-66 0##

W-19B 0##

W-49 0##/0##

W-62 0##

W-63 0##

W-68 0##

W-69 0##

W-37 0##

W-51 0##

W-52 0##

W-53 0##

W-55 0##

W-56 0##

W-72 0##

W-73 0##

W-83 0.914#

W-70 21.4#

W-71 12.2#

W-86 8.88#

W-89 27.5#

W-87 0.787#

W-97 10.3#

W-RW1 1.40#

W-RW2 23.1#

W-39 0.726#

W-94 20.4#

W-95 2.35#

W-42 5.77#

W-48 13.1#/14.9#

W-85 19.3#

W-88 6.34#

W-90 6.68#

W-27 2.42#

W-35 21.7#

W-36 15.0#

W-3A 7.25#

W-4 41.3#

W-45 4.99#

W-74 11.5#

W-75 0##

900 100 50 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Legend Black Mingo Monitoring Well Lower Floodplain Monitoring Well Upper Floodplain Monitoring Well Lower Surficial Monitoring Well Location Upper Surficial Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Extent of Technetium-99 in Groundwater Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_12_Technetium_Oct2019_LJG.mxd Technetium-99 Concentration in pCi/L Value is below minimum detectable concentration Value is reported as a negative number Not Sampled East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 321 NS EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Gator Pond EL SL NL SAN 50 900 50 100 W-17 820 W-32 321 W-6 2440 W-77 101 W-7A 210 W-47 94.2 W-64 81.9 W-67 84.3 W-15 253 W-46 62.8 W-10 118/121 W-11 3420 W-13R 63.4 W-18R 214 W-22 57.4 W-93 0##

W-57 0##

W-75 0##

W-76 0##

W-78 0##

W-81 0##

W-14 0##

W-26 0##

W-16 0##

W-38 0##

W-58 0##

W-27 2.42#

W-79 3.52#

W-80 2.56#

W-02R 23.1#

W-28 20.1#

W-29 11.6#

W-30 49.7#

W-59 13.0#

Tc-99 Isoconcentration Contour (pCi/L)

Tc-99 Inferred Isoconcentration Contour (pCi/L)

Tc-99 Inferred Isoconcentration Contour at a Concentration Less Than the Maximum Contamminant Level (pCi/L)

PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 12 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

Plant Building WL2 WL1 SAN NL SL EL Gator Pond W-91 NS W-32 0.224 W-4 0.146 J W-48

< 0.200/< 0.200 W-49 0.0695 J/0.0865 J W-50 0.101 J W-6 0.232 W-64

< 0.200 W-65

< 0.200 W-70

< 0.200 W-83

< 0.200 W-86

< 0.200 W-89

< 0.200 W-92

< 0.200 W-RW1 0.0815 J W-10 0.083 J/0.114 J W-11

< 0.200 W-13R 0.139 J W-14 0.368 W-15

< 0.200 W-16

< 0.200 W-17 0.0855 J W-18R 4.1 W-19B

< 0.200 W-20

< 0.200 W-22 0.872 W-23R

< 0.200 W-26

< 0.200 W-27

< 0.200 W-33

< 0.200/< 0.200 W-35

< 0.200 W-36

< 0.200 W-39

< 0.200 W-3A

< 0.200 W-40

< 0.200 W-41R

< 0.200 W-42

< 0.200 W-43

< 0.200 W-44

< 0.200 W-45 1.00 W-46

< 0.200 W-47

< 0.200 W-51

< 0.200 W-60

< 0.200 W-61

< 0.200 W-62

< 0.200 W-63 0.123 J W-66

< 0.200 W-67

< 0.200 W-68

< 0.200 W-69

< 0.200 W-71 0.165 J W-7A 0.698 W-81 0.0728 J W-82 0.151 J W-84 0.0704 J W-85

< 0.200 W-87 0.457 W-88

< 0.200 W-90

< 0.200 W-94

< 0.200 W-95 0.114 J W-96

< 0.200 W-97

< 0.200 W-RW2 0.0743 J 30 0.2 30 0.2 0.2 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 0

400 200 Feet 1:4,800 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Legend Upper Surficial Aquifer Monitoring Well Location Lower Surficial Aquifer Monitoring Well Location Black Mingo Aquifer Monitoring Well Location Upper Floodplain Aquifer Monitoring Well Location Lower Floodplain Aquifer Monitoring Well Location Ditch Culvert Dike Location Mill Creek Flow Direction Mill Creek Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Extent of Uranium in Groundwater Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_13_Uranium_Oct2019.mxd Total Uranium in µg/L Estimated result is less than the practical quantitation limit and greater than the method detection limit Not Sampled East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 247 J

NS EL NL SL SAN WL1 WL2 Note:

Based upon data collected in October 2019 NL SL EL W-54

< 0.200/< 0.200 W-55 183 W-58 1.72 W-73 0.0831 J W-75

< 0.200 W-93

< 0.200 W-28 0.429 W-29 2.05 W-30 8.91 W-37 0.0936 J W-38 0.183 J W-52

< 0.200 W-53

< 0.200 W-56 134 W-57 0.207 W-59 22.2 W-72 0.095 J W-74

< 0.200 W-76 0.946 W-77 247 W-78 0.0933 J W-79 0.0892 J W-80 0.151 J 30 30 0.2 0.2 Upper Sunset Lake Lower Sunset Lake Mill Creek Lower Sunset Dike Upper Sunset Dike Uranium Isoconcentration Contour (µg/L)

Uranium Inferred Isoconcentration Contour (µg/L)

Uranium Isoconcentration Contour at a Concentration Less Than the Maximum Contaminant Level (µg/L)

PROJECT NO.

PREPARED BY:

DATE:

60595649 LJG FIGURE 13 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA June 2020 Rev. February 2021

!(

!(!(

!(

!(!(

!(

!(!(

!(!(!(

!(!(!(!(

!(

Dominion Energy Substation CFFF General Direction of Groundwater Flow WSW-02 WSW-01 IWSW-01 IWSW-02 WSW-03 WSW-04 1

2 3

4 5

6 7

8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 14 q

0 4,000 2,000 Feet 1:48,000 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Data Source: Esri/USGS WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_14_PrivateWaterSupplyWells.mxd

^_

Legend

!(

Inactive Private Wells

!(

Private Wells Parcel Lines 1 Mile Buffer of Facility Property Boundary Property Line SCRDI Bluff Road (Superfund Site)

Topographic Quadrangle Boundary 1

2 3

4 5

6 Southwest Columbia Gaston Fort Jackson South Saylors Lake Congaree Gadsden ID Topographic Quadrangle Name 1

2 4

3 5

6 June 2020 Private Water Supply Well Locations

?

Entrance Dike Upper Sunset Lake Dike Lower Sunset Lake Dike Exit Dike Upper Sunset Lake Lower Sunset Lake Mill Creek WL2 WL1 SAN NL SL EL Gator Pond SW-15 SW-11 SW-16 SW-13 SW-17 SW-18 SW-14 SW-23 SW-21 SW-22 SW-12 SW-19 SW-20 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 15 q

0 700 350 Feet 1:8,400 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_15_SurfaceWaterSamplingLocations.mxd Legend

?

Ditch Culvert Mill Creek Flow Direction Mill Creek Property Line Dike Location Surface Water Sample Location East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 EL NL SL SAN WL1 WL2 June 2020 Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Surface Water Sample Locations

?

Entrance Dike Upper Sunset Lake Dike Lower Sunset Lake Dike Exit Dike Upper Sunset Lake Lower Sunset Lake Mill Creek WL2 WL1 SAN NL SL EL Gator Pond SED-22 SED-19 SED-21 SED-20 SED-26 SED-25 SED-28 SED-12 SED-11 SED-27 SED-41 SED-38 SED-39 SED-46 SED-44 SED-42 SED-40 SED-32 SED-33 SED-31 SED-30 SED-29 SED-35 SED-37 SED-34 SED-36 SED-43 SED-45 SED-50 SED-48 SED-49 SED-52 SED-51 SED-53 SED-54 SED-55 SED-56 SED-47 SED-17 SED-18 SED-14 SED-16 SED-13 SED-15 SED-23 SED-24 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 16 q

0 700 350 Feet 1:8,400 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_16_SedimentSamplingLocations.mxd Legend

?

Ditch Culvert Mill Creek Flow Direction Mill Creek Property Line Dike Location Sediment Sampling Transects Sediment Sample Collected in November/Decemberr 2019 Sediment Sample Collected in July 2019 East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 EL NL SL SAN WL1 WL2 June 2020 Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Sediment Sample Locations

?

!(

!( !(

!(!(

!(

!( !(

!(

WL2 WL1 SAN NL SL EL Gator Pond Lower Sunset Lake Upper Sunset Lake SS-1 SS-2 SS-3 SS-4 SS-5 SS-6 SS-7 SS-8 SS-9 SS-11 SS-12 SS-13 SS-10 SS-14 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 PROJECT NO.

PREPARED BY:

DATE:

60595649 RGM FIGURE 17 q

0 300 150 Feet 1:3,600 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY HOPKINS, SOUTH CAROLINA Path: M:\\EnvDataViz\\Westinghouse\\mxd\\2020_Interim_RI_Data_Summary_Rpt\\fig_17_SoilSamplingLocations.mxd Legend

?

Ditch Culvert Property Line Soil Sampling Locations

!(

East Lagoon North Lagoon South Lagoon Sanitary Lagoon West Lagoon 1 West Lagoon 2 EL NL SL SAN WL1 WL2 February 2020 Top of Bluff Inferred Top of Bluff Bottom of Bluff Inferred Bottom of Bluff Secondary Bluff Area Technetium-99 Soil Sample Locations

Table A1 - October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC W-RW1 W-RW2 W-3A W-4 W-6 W-7A W-10 W-10 W-11 W-13R W-14 W-15 W-16 W-17 W-18R W-19B W-20 W-22 W-23R W-24 W-25 W-26 W-27 W-28 W-29 W-30 W-32 W-33 W-33 W-35 W-36 W-37 W-38 10/3/2019 10/11/2019 10/10/2019 10/11/2019 10/7/2019 10/9/2019 10/9/2019 10/9/2019 10/8/2019 10/8/2019 10/18/2019 10/21/2019 10/21/2019 10/21/2019 10/7/2019 10/21/2019 10/15/2019 10/7/2019 10/18/2019 10/11/2019 10/16/2019 10/14/2019 10/10/2019 10/7/2019 10/7/2019 10/7/2019 10/8/2019 10/17/2019 10/17/2019 10/2/2019 10/2/2019 10/2/2019 10/4/2019 N

N N

FD N

N N

N FD N

N N

N Group Analyte MCL Units Radiological Alpha particles 15**

pCi/L 2.51 #

2.00 #

2.36 #

3.36 #

9.09 6.35 3.19 2.19 #

7.82 2.15 #

4.27 0 ##

0.421 #

2.86 #

9.79 #

2.26 #

0.912 #

2.92 #

0 ##

10.1 0.697 #

0 ##

3.14 #

2.25 #

7.57 7.17 2.89 #

2.51 #

0.793 #

0.270 #

1.75 #

2.54 #

Radiological Beta particles 50**

pCi/L 3.98 11.9 1.15 #

19.4 1370 114 81.3 76.2 2450 53.2 35.6 174 10.6 538 150 0 ##

3.22 #

29.6 1.68 #

2.51 #

7.27 12.5 5.10 8.26 7.67 20.8 175 7.78 5.81 3.54 #

0 ##

2.43 #

Radiological Tritium pCi/L 270 #

0 ##

32.7 #

165 #

116 #

0 ##

12.8 #

210 #

115 #

67.8 #

38.6 #

116 #

443 #

81.8 #

0 ##

137 #

Radiological Technetium-99 900 pCi/L 1.40 #

23.1 #

7.25 #

41.3#

2440 210 118 121 3420 63.4 0 ##

253 0 ##

820 214 0 ##

0 ##

57.4 0 ##

13.0 #

0 ##

2.42 #

20.1 #

11.6 #

49.7#

321 0 ##

0 ##

21.7 #

15.0 #

0 ##

Radiological Uranium-233/234 pCi/L 0.126 #

0.252 #

0.287 #

0.313 0.372 0.409 0.0993 #

0.0991 #

0.205 #

0.246 #

0.0696 #

0.0108 #

0.168 #

0.209 #

1.53 0.197 #

0.0228 #

0.905 0.0833 #

0.136 #

0.195 #

0.0497 #

0.0588 #

0.672 1.20 11.5 0.322 0.102 #

0.0758 #

0.304 0.148 #

0.103 #

0.106 #

Radiological Uranium-235/236 pCi/L 0.139 #

0.107 #

0.0414 #

0.124 #

0.0443 #

0.0909 #

0.0935 #

0.219 0.0769 #

0.0418 #

0 ##

0.162 #

0.0107 #

0.0726 #

0.266 0.125 #

0.0276 #

0.136 #

0 ##

0.0816 #

0.0748 #

0.0344 #

0.198 0 #

0 #

0.914 0 ##

0.0445 #

0.0446 #

0.0450 #

0 ##

0 #

Radiological Uranium-238 pCi/L 0.169 #

0.0958 #

0.145 #

0.392 0.153 #

0.259 0.180 #

0.212 0.133 #

0.221 0.139 #

0.0531 #

0.0718 #

0.0507 #

1.17 0.0559 #

0.0995 #

0.322 0.0221 #

0.0660 #

0.269 0.0381 #

0.171 #

0.119 #

0.972 3.31 0.191 0.0274 #

0.0361 #

0.109 0 ##

0.0277 #

0.128 Radiological Percent Uranium-235 0 #

0 #

13.8 0 #

0 #

3.41 0 #

0 #

15.2 0 #

0 #

4.12 0 #

0 #

Radiological Uranium-234 ug/L

< 0.050

< 0.050 Radiological Uranium-235 ug/L

< 0.070

< 0.070 0.035 J

< 0.070

< 0.070 0.0177 J

< 0.070

< 0.070 0.026 J 0.199

< 0.070

< 0.070 Radiological Uranium-238 ug/L 0.0815 J 0.0743 J

< 0.200 0.146 J 0.232 0.698 0.083 J 0.114 J

< 0.200 0.139 J 0.368

< 0.200

< 0.200 0.0855 J 4.06

< 0.200

< 0.200 0.854

< 0.200

< 0.200 0.295

< 0.200

< 0.200 0.429 2.03 8.71 0.224

< 0.200

< 0.200 0.0936 J 0.183 J Radiological Total Uranium Isotopes 30 ug/L 0.0815 J 0.0743 J

< 0.200 0.146 J 0.232 0.698 0.083 J 0.114 J

< 0.200 0.139 J 0.368

< 0.200

< 0.200 0.0855 J 4.10

< 0.200

< 0.200 0.872

< 0.200

< 0.200 0.295

< 0.200

< 0.200 0.429 2.05 8.91 0.224

< 0.200

< 0.200 0.0936 J 0.183 J Chemical Fluoride 4

mg/L 0.055 0.099 0.015 4.86 0.126 6.47 3.32 3.25 0.021 8.11 0.079 1.88 9.5 2.22 6.34 0.019 0.077 5.52 0.017 0.025 0.126 1.42 3.97 5.45 4.8 8.06 3.66 0.152 0.136 0.025 0.007 0.02 0.176 Chemical Nitrate as N 10 mg/L 2.1 20

< 0.020 0.023 210 390 37 37 56 18 0.061 35 3.2 16 770 3.8

< 0.020 100 0.71

< 0.020 0.067 3.2

< 0.020 6.3 11 120 170 13 13 3.2 0.11 3.5 4.3 Chemical Ammonia as N mg/L 0.0129 0.0581 0.0256 0.404 134 48.5 6.46 6.62 4.09 31.5 4.26 12.6 13.3 5.79 126 0.0146 0.0632 61.8 0.0154 0.0283 1.91 1.75 6.29 0.884 22.4 1.83 47.9 0.0134 0.0189 0.0075 0.0089 0.0088 0.0141 Metals Aluminum ug/L 147 J 120 J

< 200 105 J

< 200

< 200 559 551

< 200 831

< 200 75 J 827

< 200

< 200 1610

< 200

< 200 486 326

< 200 981

< 200 356

< 200

< 200 80.9 J Metals Antimony 6

ug/L

< 20.0

< 20.0 4.52 J 3.64 J

< 20.0

< 20.0 4.02 J

< 20.0

< 20.0 3.87 J 4.6 J Metals Arsenic 10 ug/L

< 30.0

< 30.0 5.32 J

< 30.0

< 30.0 Metals Barium 2000 ug/L 48.2 106 5.92 99.1 496 595 191 186 658 93.3 799 304 135 164 713 84.8 181 46.3 53.8 12.1 94 197 220 44.1 158 234 484 181 201 62.5 34.9 51.6 96.7 Metals Beryllium 4

ug/L

< 5.00

< 5.00 1.89 J

< 5.00

< 5.00 1.28 J

< 5.00

< 5.00 1.76 J

< 5.00

< 5.00 1.03 J

< 5.00

< 5.00 Metals Cadmium 5

ug/L

< 5.00

< 5.00 3.73 J

< 5.00 1.94 J

< 5.00

< 5.00 Metals Calcium ug/L 4600 16600 490 12100 71400 99500 25100 24400 27900 20500 66000 23700 12500 16300 222000 4330 9740 55300 1380 4310 12600 16100 10700 10500 18800 90700 40600 12700 14100 16000 1430 9960 7850 Metals Chromium 100 ug/L 3.46 J

< 10.0

< 10.0 4.46 J

< 10.0

< 10.0 1.04 J 1.94 J

< 10.0

< 10.0 2.27 J

< 10.0 1.07 J 1.96 J

< 10.0 1.95 J

< 10.0 2.06 J

< 10.0

< 10.0 4.22 J 4.29 J Metals Cobalt ug/L 2.5 J 4.14 J 1.21 J 1.19 J 6.41 7.56 2.26 J 2.53 J 2.05 J 7.87 24 4.38 J 3.32 J 6.53 1.16 J

< 5.00 3.69 J 7.89

< 5.00

< 5.00 2.93 J

< 5.00 7.88

< 5.00 1.24 J

< 5.00

< 5.00 4.39 J

< 5.00

< 5.00 1.84 J Metals Copper 1300 ug/L

< 20.0

< 20.0 58.6

< 20.0

< 20.0 3.83 J

< 20.0

< 20.0 6.02 J Metals Iron ug/L 134

< 100 562 4930

< 100

< 100 55.1 J 11900

< 100 164

< 100

< 100 229 65.8 J

< 100 626 19700

< 100 29000 56.3 J

< 100

< 100 460

< 100

< 100 Metals Lead 15 ug/L

< 20.0

< 100

< 20.0

< 20.0 4.1 J 4.81 J

< 20.0

< 20.0 Metals Magnesium ug/L 1580 3500 251 J 5100 21600 24700 7800 7630 13200 7990 18900 9330 4230 5030 36000 1520 6900 9890 852 2260 5040 5570 13900 995 5250 4230 12000 5160 5620 4310 437 5860 4650 Metals Manganese ug/L 38 90.3 8.71 J 539 142 824 440 427 83.5 405 3440 230 427 282 229

< 10.0 420 1280 7.36 J 2.37 J 272 239 5370 23 32.7 73.2 363 4.55 J 5.08 J 5.29 J 54.9

< 10.0 48.5 Metals Mercury 2

ug/L

< 0.200

< 0.200 0.084 J

< 0.200

< 0.200 0.219 Metals Nickel ug/L 4480 7.34 1.85 J 2.6 J 6.89 17.5 10.3 10.5 10.8 9.39 2.07 J 5.84 4.08 J 8.33 12 1.95 J 2.29 J 13.4

< 5.00

< 5.00 2.72 J

< 5.00 18.7 4.04 J 4.74 J 5.71 977

< 5.00

< 5.00 271 Metals Potassium ug/L 1570 2500 664 5990 13400 11500 8800 8700 6280 9980 17500 8550 12900 7440 11400 1510 666 7030 645 934 2500 8010 3850 8120 4500 7800 9130 2780 2970 3320 1190 2230 2640 Metals Selenium 50 ug/L

< 30.0 7.61 J

< 30.0 6.33 J 12.9 J 14.9 J 9.01 J 7.72 J 8.48 J

< 30.0 6.14 J

< 30.0

< 30.0 23.7 J

< 30.0

< 30.0 9.61 J

< 30.0

< 30.0 8.76 J 20.3 J

< 30.0

< 30.0 13 J

< 30.0 8.99 J 12.8 J Metals Silver ug/L 1.14 J

< 5.00 1.22 J

< 5.00

< 5.00 1.6 J

< 5.00

< 5.00 1.25 J

< 5.00 1.56 J 1.68 J 1.02 J

< 5.00

< 5.00 1.15 J

< 5.00

< 5.00 Metals Sodium ug/L 5040 19700 2410 45100 124000 447000 79300 78100 36200 50400 15700 38900 20000 35000 948000 7420 8600 159000 8150 2420 8090 21300 22400 137000 32900 147000 221000 14400 15300 8180 5450 13300 21300 Metals Thallium 2

ug/L

< 20.0

< 20.0 Metals Vanadium ug/L

< 5.00

< 5.00 2.36 J 4.07 J 5.11 2.56 J 2.67 J

< 5.00 2.81 J

< 5.00 2.03 J 2.69 J 8.37 6.59

< 5.00

< 5.00 1.92 J

< 5.00

< 5.00 9.28 1.26 J

< 5.00 2.32 J 8.16 2.25 J 2.99 J

< 5.00

< 5.00 1.72 J

< 5.00

< 5.00 Metals Zinc ug/L 7.63 J 7.87 J 8.59 J 7.9 J 13.9 J 4.69 J 7.18 J 41.1 45 5.79 J 11.5 J 10.7 J 19.1 J 29 26.4 7 J 7.63 J 47 4.69 J 4.23 J 16 J

< 20.0 4.96 J 10.3 J 4.5 J 12 J 7.24 J 27.1 28.3 12.2 J 9.36 J 12.9 J 10.9 J SVOCs 1,1'-Biphenyl ug/L

< 4.0

< 4.0 SVOCs 2,4,5-Trichlorophenol ug/L

< 4.0

< 4.0 SVOCs 2,4,6-Trichlorophenol ug/L

< 4.0

< 4.0 SVOCs 2,4-Dichlorophenol ug/L

< 8.0

< 8.0 SVOCs 2,4-Dimethylphenol ug/L

< 4.0

< 4.0 SVOCs 2,4-Dinitrophenol ug/L

< 20

< 20 SVOCs 2,4-Dinitrotoluene ug/L

< 8.0

< 8.0 SVOCs 2,6-Dinitrotoluene ug/L

< 8.0

< 8.0 SVOCs 2-Chloronaphthalene ug/L

< 4.0

< 4.0 SVOCs 2-Chlorophenol ug/L

< 4.0

< 4.0 SVOCs 2-Methylnaphthalene ug/L

< 0.80

< 0.80 SVOCs 2-Methylphenol ug/L

< 4.0

< 4.0 SVOCs 2-Nitroaniline ug/L

< 8.0

< 8.0 SVOCs 2-Nitrophenol ug/L

< 4.0

< 4.0 SVOCs 3,3'-Dichlorobenzidine ug/L

< 4.0

< 4.0 SVOCs 3-Nitroaniline ug/L

< 8.0

< 8.0 SVOCs 4,6-Dinitro-2-methylphenol ug/L

< 20

< 20 SVOCs 4-Bromophenyl phenyl ether ug/L

< 4.0

< 4.0 SVOCs 4-Chloro-3-methylphenol ug/L

< 4.0

< 4.0 SVOCs 4-Chloroaniline ug/L

< 8.0

< 8.0 SVOCs 4-Chlorophenyl phenyl ether ug/L

< 4.0

< 4.0 SVOCs 4-Methylphenol ug/L

< 4.0

< 4.0 SVOCs 4-Nitroaniline ug/L

< 8.0

< 8.0 SVOCs 4-Nitrophenol ug/L

< 20

< 20 SVOCs Acenaphthene ug/L

< 0.80

< 0.80 SVOCs Acenaphthylene ug/L

< 0.80

< 0.80 SVOCs Acetophenone ug/L

< 4.0

< 4.0 SVOCs Anthracene ug/L

< 0.80

< 0.80 SVOCs Atrazine 3

ug/L

< 4.0

< 4.0 SVOCs Benz(a)anthracene ug/L

< 0.80

< 0.80 SVOCs Benzaldehyde ug/L

< 8.0

< 8.0 SVOCs Benzo(a)pyrene 0.2 ug/L

< 0.80

< 0.80 SVOCs Benzo(b)fluoranthene ug/L

< 0.80

< 0.80 SVOCs Benzo(g,h,i)perylene ug/L

< 0.80

< 0.80 SVOCs Benzo(k)fluoranthene ug/L

< 0.80

< 0.80 SVOCs Bis(2-chloroethoxy)methane ug/L

< 4.0

< 4.0 SVOCs Bis(2-chloroethyl)ether ug/L

< 4.0

< 4.0 SVOCs Bis(2-chloroisopropyl)ether ug/L

< 4.0

< 4.0 SVOCs Bis(2-ethylhexyl)phthalate 6

ug/L

< 4.0

< 4.0 SVOCs Butyl benzyl phthalate ug/L

< 4.0

< 4.0 Well Date Type Page 1 of 6

Table A1 - October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC W-RW1 W-RW2 W-3A W-4 W-6 W-7A W-10 W-10 W-11 W-13R W-14 W-15 W-16 W-17 W-18R W-19B W-20 W-22 W-23R W-24 W-25 W-26 W-27 W-28 W-29 W-30 W-32 W-33 W-33 W-35 W-36 W-37 W-38 10/3/2019 10/11/2019 10/10/2019 10/11/2019 10/7/2019 10/9/2019 10/9/2019 10/9/2019 10/8/2019 10/8/2019 10/18/2019 10/21/2019 10/21/2019 10/21/2019 10/7/2019 10/21/2019 10/15/2019 10/7/2019 10/18/2019 10/11/2019 10/16/2019 10/14/2019 10/10/2019 10/7/2019 10/7/2019 10/7/2019 10/8/2019 10/17/2019 10/17/2019 10/2/2019 10/2/2019 10/2/2019 10/4/2019 N

N N

FD N

N N

N FD N

N N

N Group Analyte MCL Units Well Date Type SVOCs Caprolactam ug/L

< 8.0

< 8.0 SVOCs Carbazole ug/L

< 4.0

< 4.0 SVOCs Chrysene ug/L

< 0.80

< 0.80 SVOCs Di-n-butyl phthalate ug/L

< 4.0

< 4.0 SVOCs Di-n-octyl phthalate ug/L

< 4.0

< 4.0 SVOCs Dibenz(a,h)anthracene ug/L

< 0.80

< 0.80 SVOCs Dibenzofuran ug/L

< 4.0

< 4.0 SVOCs Diethyl phthalate ug/L

< 4.0

< 4.0 SVOCs Dimethyl phthalate ug/L

< 4.0

< 4.0 SVOCs Fluoranthene ug/L

< 0.80

< 0.80 SVOCs Fluorene ug/L

< 0.80

< 0.80 SVOCs Hexachlorobenzene 1

ug/L

< 4.0

< 4.0 SVOCs Hexachlorobutadiene ug/L

< 4.0

< 4.0 SVOCs Hexachlorocyclopentadiene 50 ug/L

< 20

< 20 SVOCs Hexachloroethane ug/L

< 4.0

< 4.0 SVOCs Indeno(1,2,3-cd)pyrene ug/L

< 0.80

< 0.80 SVOCs Isophorone ug/L

< 4.0

< 4.0 SVOCs N-Nitrosodi-n-propylamine ug/L

< 4.0

< 4.0 SVOCs N-Nitrosodiphenylamine ug/L

< 4.0

< 4.0 SVOCs Naphthalene ug/L

< 0.80

< 0.80 SVOCs Nitrobenzene ug/L

< 4.0

< 4.0 SVOCs Pentachlorophenol 1

ug/L

< 20

< 20 SVOCs Phenanthrene ug/L

< 0.80

< 0.80 SVOCs Phenol ug/L

< 4.0

< 4.0 SVOCs Pyrene ug/L

< 0.80

< 0.80 VOCs (1-Methylethyl)-Benzene ug/L

< 1.0

< 1.0 VOCs 1,1,1-Trichloroethane 200 ug/L

< 1.0

< 1.0 VOCs 1,1,2,2-Tetrachloroethane ug/L

< 1.0

< 1.0 VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/L

< 1.0

< 1.0 VOCs 1,1,2-Trichloroethane 5

ug/L

< 1.0

< 1.0 VOCs 1,1-Dichloroethane ug/L

< 1.0

< 1.0 VOCs 1,1-Dichloroethene 7

ug/L

< 1.0

< 1.0 VOCs 1,2,4-Trichlorobenzene 70 ug/L

< 1.0

< 1.0 VOCs 1,2-Dibromo-3-chloropropane 0.2 ug/L

< 1.0

< 1.0 VOCs 1,2-Dibromoethane 0.05 ug/L

< 1.0

< 1.0 VOCs 1,2-Dichlorobenzene 600 ug/L

< 1.0

< 1.0 VOCs 1,2-Dichloroethane 5

ug/L

< 1.0

< 1.0 VOCs 1,2-Dichloropropane 5

ug/L

< 1.0

< 1.0 VOCs 1,3-Dichlorobenzene ug/L

< 1.0

< 1.0 VOCs 1,4-Dichlorobenzene 75 ug/L

< 1.0

< 1.0 VOCs 2-Butanone ug/L

< 10

< 10 VOCs 2-Hexanone ug/L

< 10

< 10 VOCs 4-Methyl-2-pentanone ug/L

< 10

< 10 VOCs Acetone ug/L

< 20

< 20 VOCs Benzene 5

ug/L

< 1.0

< 1.0 VOCs Bromodichloromethane ug/L

< 1.0

< 1.0 VOCs Bromoform ug/L

< 1.0

< 1.0 VOCs Bromomethane ug/L

< 2.0

< 2.0 VOCs Carbon disulfide ug/L

< 1.0

< 1.0 VOCs Carbon tetrachloride 5

ug/L

< 1.0

< 1.0 VOCs Chlorobenzene 100 ug/L

< 1.0

< 1.0 VOCs Chloroethane ug/L

< 2.0

< 2.0 VOCs Chloroform ug/L

< 1.0

< 1.0 1.1

< 1.0

< 1.0 1.9

< 1.0

< 1.0 1.0

< 1.0

< 1.0 VOCs Chloromethane ug/L

< 1.0

< 1.0 VOCs cis-1,2-Dichloroethene 70 ug/L

< 1.0

< 1.0 2.8

< 1.0

< 1.0 1.3 1.5

< 1.0

< 1.0 3.7

< 1.0

< 1.0 1.0

< 1.0

< 1.0 VOCs cis-1,3-Dichloropropene ug/L

< 1.0

< 1.0 VOCs Cyclohexane ug/L

< 1.0

< 1.0 VOCs Dibromochloromethane ug/L

< 1.0

< 1.0 VOCs Dichlorodifluoromethane ug/L

< 2.0

< 2.0 VOCs Ethylbenzene 700 ug/L

< 1.0

< 1.0 VOCs Methyl acetate ug/L

< 1.0

< 1.0 VOCs Methyl tert-butyl ether ug/L

< 1.0

< 1.0 VOCs Methylcyclohexane ug/L

< 5.0

< 5.0 VOCs Methylene chloride 5

ug/L

< 1.0

< 1.0 VOCs Styrene 100 ug/L

< 1.0

< 1.0 VOCs Tetrachloroethene 5

ug/L 1.4 140

< 1.0

< 1.0 16 1.9

< 1.0

< 1.0 1.4 15 1.1 12 7.8 4.3 3.5 150

< 1.0

< 1.0 1.4 300 330 2.6

< 1.0

< 1.0 1.8 VOCs Toluene 1000 ug/L

< 1.0

< 1.0 VOCs trans-1,2-Dichloroethene 100 ug/L

< 1.0

< 1.0 VOCs trans-1,3-Dichloropropene ug/L

< 1.0

< 1.0 VOCs Trichloroethene 5

ug/L

< 1.0 8.3

< 1.0

< 1.0 2.5

< 1.0

< 1.0 1.4

< 1.0 2.0 2.2

< 1.0

< 1.0 2.5

< 1.0

< 1.0 38 24

< 1.0

< 1.0 11 VOCs Trichlorofluoromethane ug/L

< 1.0

< 1.0 VOCs Vinyl chloride 2

ug/L

< 1.0

< 1.0 VOCs Xylenes, Total 10000 ug/L

< 1.0

< 1.0 Page 2 of 6

Table A1 - October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Radiological Alpha particles 15**

pCi/L Radiological Beta particles 50**

pCi/L Radiological Tritium pCi/L Radiological Technetium-99 900 pCi/L Radiological Uranium-233/234 pCi/L Radiological Uranium-235/236 pCi/L Radiological Uranium-238 pCi/L Radiological Percent Uranium-235 Radiological Uranium-234 ug/L Radiological Uranium-235 ug/L Radiological Uranium-238 ug/L Radiological Total Uranium Isotopes 30 ug/L Chemical Fluoride 4

mg/L Chemical Nitrate as N 10 mg/L Chemical Ammonia as N mg/L Metals Aluminum ug/L Metals Antimony 6

ug/L Metals Arsenic 10 ug/L Metals Barium 2000 ug/L Metals Beryllium 4

ug/L Metals Cadmium 5

ug/L Metals Calcium ug/L Metals Chromium 100 ug/L Metals Cobalt ug/L Metals Copper 1300 ug/L Metals Iron ug/L Metals Lead 15 ug/L Metals Magnesium ug/L Metals Manganese ug/L Metals Mercury 2

ug/L Metals Nickel ug/L Metals Potassium ug/L Metals Selenium 50 ug/L Metals Silver ug/L Metals Sodium ug/L Metals Thallium 2

ug/L Metals Vanadium ug/L Metals Zinc ug/L SVOCs 1,1'-Biphenyl ug/L SVOCs 2,4,5-Trichlorophenol ug/L SVOCs 2,4,6-Trichlorophenol ug/L SVOCs 2,4-Dichlorophenol ug/L SVOCs 2,4-Dimethylphenol ug/L SVOCs 2,4-Dinitrophenol ug/L SVOCs 2,4-Dinitrotoluene ug/L SVOCs 2,6-Dinitrotoluene ug/L SVOCs 2-Chloronaphthalene ug/L SVOCs 2-Chlorophenol ug/L SVOCs 2-Methylnaphthalene ug/L SVOCs 2-Methylphenol ug/L SVOCs 2-Nitroaniline ug/L SVOCs 2-Nitrophenol ug/L SVOCs 3,3'-Dichlorobenzidine ug/L SVOCs 3-Nitroaniline ug/L SVOCs 4,6-Dinitro-2-methylphenol ug/L SVOCs 4-Bromophenyl phenyl ether ug/L SVOCs 4-Chloro-3-methylphenol ug/L SVOCs 4-Chloroaniline ug/L SVOCs 4-Chlorophenyl phenyl ether ug/L SVOCs 4-Methylphenol ug/L SVOCs 4-Nitroaniline ug/L SVOCs 4-Nitrophenol ug/L SVOCs Acenaphthene ug/L SVOCs Acenaphthylene ug/L SVOCs Acetophenone ug/L SVOCs Anthracene ug/L SVOCs Atrazine 3

ug/L SVOCs Benz(a)anthracene ug/L SVOCs Benzaldehyde ug/L SVOCs Benzo(a)pyrene 0.2 ug/L SVOCs Benzo(b)fluoranthene ug/L SVOCs Benzo(g,h,i)perylene ug/L SVOCs Benzo(k)fluoranthene ug/L SVOCs Bis(2-chloroethoxy)methane ug/L SVOCs Bis(2-chloroethyl)ether ug/L SVOCs Bis(2-chloroisopropyl)ether ug/L SVOCs Bis(2-ethylhexyl)phthalate 6

ug/L SVOCs Butyl benzyl phthalate ug/L Well Date Type W-39 W-40 W-41R W-42 W-43 W-44 W-45 W-46 W-47 W-48 W-48 W-49 W-49 W-50 W-51 W-52 W-53 W-54 W-54 W-55 W-56 W-57 W-58 W-59 W-60 W-61 W-62 W-63 W-64 W-65 W-66 W-67 W-68 10/18/2019 10/15/2019 10/14/2019 10/22/2019 10/18/2019 10/14/2019 10/2/2019 10/21/2019 10/17/2019 10/21/2019 10/21/2019 10/24/2019 10/24/2019 10/15/2019 10/3/2019 10/3/2019 10/3/2019 10/4/2019 10/4/2019 10/4/2019 10/4/2019 10/3/2019 10/4/2019 10/5/2019 10/17/2019 10/17/2019 10/22/2019 10/21/2019 10/17/2019 10/17/2019 10/17/2019 10/18/2019 10/22/2019 N

N N

N FD N

FD N

N N

FD N

N N

N 1.22 #

0.796 #

8.93 0.753 #

0.159 #

3.47 #

4.37 0.656 #

1.60 #

0.460 #

0 ##

0.196 #

1.80 #

3.48 #

0.544 #

0 ##

1.61 #

1.55 #

1.53 #

438 264 0.202 #

4.21 44.4 0.200 #

1.31 #

0 ##

1.22 #

4.11 #

1.22 #

0 ##

0.945 #

0.922 #

8.84 3.44 #

14.3 3.16 #

3.16 #

0.283 #

16.6 40.4 61.6 9.32 7.64 4.34 #

0.719 #

0.0720 #

3.56 1.61 #

1.72 #

1.96 #

0.741 #

77.3 54.5 3.09 #

2.43 #

17.4 1.38 #

0.862 #

4.85 3.32 #

70.3 7.14 3.33 #

65.3 2.33 #

174 #

223 #

4.14 #

0 ##

137 #

87.4 #

190 #

0.726 #

0 ##

5.77 #

0 ##

4.99 #

62.8 94.2 13.1 #

14.9 #

0 ##

13.0 #

0 ##

81.9 0 ##

0 ##

84.3 0 ##

0 ##

0.0131 #

0.0652 #

0 ##

0.0335 #

0.897 0.317 #

0 ##

0.0449 #

0.231 #

0.154 #

0.432 0.279 #

0.0146 #

0.121 #

0.0359 #

0.0685 #

0.101 #

290 192 0 ##

2.10 38.0 0.0248 #

0 ##

0.0178 #

0.266 #

0.0871 #

0 ##

0.0479 #

0 ##

0.204 #

0.00196 #

0.0454 #

0.0336 #

0.110 #

0.0698 #

0.0360 #

0 ##

0.106 #

0.0663 #

0.0321 #

0.0468 #

0.0799 #

0.115 0 ##

0 ##

0.0554 16.3 9.18 0 #

0.104 #

2.02 0.0418 #

0.0596 #

0.0998 #

0.0677 #

0.0256 #

0 ##

0.00220 #

0 #

0.0452 #

0.149 #

0.129 #

0.0757 #

0.0468 #

0.0475 #

0.0107 #

0.477 0.0325 #

0 ##

0.0109 #

0.00988 #

0.0380 #

0.0260 #

0.201 #

0 ##

0.00124 #

0 ##

0.0126 #

0.0560 #

60.5 37.9 0.0165 #

0.331 #

8.26 0.00356 #

0.0254 #

0.142 #

0.264 #

0.0239 #

0.0898 #

0.0800 #

0.0343 #

0.0102 #

0 #

93.5 0 #

0 #

13.3 4.01 3.63 0 #

0 #

3.66 0 #

0 #

< 0.050

< 0.050 0.052 0.034 J

< 0.050

< 0.070

< 0.070 0.0216 J

< 0.070

< 0.070 5.79 4.19

< 0.070 0.049 J 0.659

< 0.070

< 0.200

< 0.200 0.983

< 0.200

< 0.200 0.0695 J 0.0865 J 0.101 J

< 0.200

< 0.200 177 130 0.207 1.67 21.6

< 0.200

< 0.200 0.123 J

< 0.200

< 0.200 1.00

< 0.200

< 0.200 0.0695 J 0.0865 J 0.101 J

< 0.200

< 0.200 183 134 0.207 1.72 22.2

< 0.200

< 0.200 0.123 J

< 0.200

< 0.200 0.024 0.166 0.03 1.99 0.111 0.023 0.633 0.033 4.45 0.33 0.321 0.003 0.053 0.035 0.215 1.39 0.081 0.258 0.26 0.062 0.257 0.057 0.18 4.18 0.034 0.036 0.019 0.259 4.27 0.783 0.076 0.01 0.02 73 4.3 65 4.7 6.3 2.4 0.093 7.8 42 5.3 4.9

< 0.020

< 0.020 0.11 1.3 0.57 2.8 2.8 3.7 4.2 4.6 9.7 14 0.035 2.5 4.0 0.34 42 0.64 1.5 14 3.0 0.0218 0.0203 0.0299 0.806 0.0198 0.0186 2.08 0.0129 16.5 0.0446 0.0422 0.0151 0.0097 0.0185 0.256 0.0212 0.0397 0.0037 0.0125 0.0108 0.009 0.0155 18.6 12.3 0.0251 0.0274 0.0162 0.023 16 0.0489 0.0336 1.31 0.0143

< 200

< 200 1150

< 200

< 200 90.5 J

< 200 571 70.4 J 87.4 J

< 200

< 200 785

< 200

< 200 8.79 J 8.02 J 6.21 J

< 20.0 3.76 J

< 20.0 8.1 J

< 20.0 5.33 J

< 20.0

< 20.0 7.32 J

< 20.0 4.12 J

< 20.0

< 20.0 7.39 J 4.3 J 7.38 J 4.22 J

< 20.0 5.44 J

< 20.0

< 20.0 8.91 J

< 20.0

< 30.0

< 30.0 5.4 J

< 30.0

< 30.0 324 16.8 655 101 159 151 28.8 144 260 97.1 99.1 10.5 11.6 8.87 57 59.9 78.2 61.2 61.8 41.6 57.1 73.4 167 210 121 216 75.7 70.9 394 93.7 68.5 306 92.9

< 5.00

< 5.00 3.32 J

< 5.00

< 5.00 1.26 J 2.32 J

< 5.00

< 5.00 2.35 J

< 5.00

< 5.00 41500 16700 34600 3980 8770 5460 35100 8640 22300 5690 5870 729 790 733 11600 11100 15600 11900 12100 8400 11300 10600 17500 16400 6900 10400 4420 12600 22900 8060 6730 11500 4530

< 10.0

< 10.0 1.48 J

< 10.0 1.28 J 3.15 J

< 10.0

< 10.0 1.24 J

< 10.0 1.11 J 9.3 J 14.7

< 10.0

< 10.0 1.41 J

< 10.0 2.36 J 2.48 J 5.03 J 4.16 J 3.38 J

< 10.0

< 10.0 1.14 J

< 10.0

< 10.0 2.69 J 1.52 J

< 5.00

< 5.00 3.22 J

< 5.00

< 5.00 2.04 J 1.16 J 7.85

< 5.00

< 5.00 1.25 J 1.19 J 2.36 J 3.06 J 6.28 10.6

< 5.00

< 5.00 1.82 J 5.12

< 5.00

< 5.00 14.1 1.19 J

< 5.00 4.77 J

< 5.00

< 20.0

< 20.0 109

< 20.0

< 100

< 100 75.8 J 34900

< 100

< 100 817 1010 443 40100 2400 5620 1190 1230

< 100

< 100 30.6 J

< 100

< 100 3810 150

< 100 3440

< 100 3680

< 100

< 100 30.1 J

< 20.0 5.76 J

< 20.0

< 20.0 5.46 J

< 20.0

< 20.0 3.41 J 5.14 J

< 20.0

< 20.0 5.51 J

< 20.0

< 20.0 7620 2630 11000 1970 3590 3060 7930 4980 8890 2230 2300 296 J 333 335 3830 3740 6580 4910 4970 5170 5480 5240 6050 6590 2210 3310 1660 1770 9060 2160 2400 4130 1850 43.4

< 10.0 5.52 J 343 5.24 J 8.67 J 316 8.93 J 986 26.9 28.8 8.85 J 9.89 J 10.4 822 696 376 29.9 32.1 3.76 J 7.66 J 18.9 208 62.8 76.8 330 4.32 J 259 662 193 15.4 16.5 2.94 J

< 0.200

< 0.200 0.284 0.189 J

< 0.200

< 5.00

< 5.00 1.62 J

< 5.00

< 5.00 262 6.13 3.35 J

< 5.00

< 5.00 3.11 J 3.61 J 3.06 J 28.2 122 2.91 J 144 127 17.3 4.73 J 25.6 96.7 10.3

< 5.00 4.81 J 2.04 J

< 5.00 3.94 J

< 5.00

< 5.00 2.64 J 2.3 J 3230 2820 5240 3690 2650 2850 7530 2670 9220 2940 3030 607 732 670 2700 2430 3570 2590 2610 2130 2710 2740 4300 6120 2400 3850 1630 5280 8640 2200 1990 4250 1410

< 30.0

< 30.0 10.5 J

< 30.0

< 30.0 7.27 J 9.06 J 13.1 J 15.4 J 9.89 J 8.58 J 11.1 J 9.88 J 8.65 J

< 30.0

< 5.00 1.17 J 1.08 J

< 5.00 1.05 J 2.18 J

< 5.00

< 5.00 1.53 J

< 5.00

< 5.00 1.08 J

< 5.00 1.75 J

< 5.00

< 5.00 2.5 J

< 5.00

< 5.00 106000 2210 66600 3770 3020 5570 390000 18700 53900 10100 10400 3660 3900 3180 8610 30900 10700 10900 10800 11400 14000 12300 18600 41800 7130 4000 6540 73900 49100 20900 5430 21900 6980

< 20.0

< 5.00 1.25 J

< 5.00

< 5.00 1.33 J

< 5.00 4.29 J

< 5.00

< 5.00 2.04 J 6.31

< 5.00

< 5.00 1.35 J

< 5.00

< 5.00 6.41 J

< 20.0 7.38 J 4.36 J 4.53 J

< 20.0 12.6 J 10.7 J 4.27 J 4.74 J 5.1 J 8.09 J 9.19 J 11.8 J 6.65 J 11.6 J 15.2 J 6.15 J 6.82 J 7.38 J 6.45 J 9.15 J 5.83 J 7.86 J 4.33 J 6.41 J 6.66 J 4.57 J

< 20.0 3.98 J 4.35 J 6.72 J 6.54 J

< 4.0

< 4.0 4.2

< 4.0

< 4.0 7.4

< 4.0 4.0

< 4.0

< 8.0

< 4.0

< 20

< 8.0

< 4.0

< 0.80

< 0.80 12

< 0.80

< 4.0

< 8.0

< 4.0

< 8.0

< 20

< 4.0

< 8.0

< 4.0

< 8.0

< 20

< 0.80

< 0.80 1.5

< 0.80

< 4.0

< 0.80

< 4.0

< 0.80

< 8.0

< 0.80

< 4.0

< 4.0 Page 3 of 6

Table A1 - October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Well Date Type SVOCs Caprolactam ug/L SVOCs Carbazole ug/L SVOCs Chrysene ug/L SVOCs Di-n-butyl phthalate ug/L SVOCs Di-n-octyl phthalate ug/L SVOCs Dibenz(a,h)anthracene ug/L SVOCs Dibenzofuran ug/L SVOCs Diethyl phthalate ug/L SVOCs Dimethyl phthalate ug/L SVOCs Fluoranthene ug/L SVOCs Fluorene ug/L SVOCs Hexachlorobenzene 1

ug/L SVOCs Hexachlorobutadiene ug/L SVOCs Hexachlorocyclopentadiene 50 ug/L SVOCs Hexachloroethane ug/L SVOCs Indeno(1,2,3-cd)pyrene ug/L SVOCs Isophorone ug/L SVOCs N-Nitrosodi-n-propylamine ug/L SVOCs N-Nitrosodiphenylamine ug/L SVOCs Naphthalene ug/L SVOCs Nitrobenzene ug/L SVOCs Pentachlorophenol 1

ug/L SVOCs Phenanthrene ug/L SVOCs Phenol ug/L SVOCs Pyrene ug/L VOCs (1-Methylethyl)-Benzene ug/L VOCs 1,1,1-Trichloroethane 200 ug/L VOCs 1,1,2,2-Tetrachloroethane ug/L VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/L VOCs 1,1,2-Trichloroethane 5

ug/L VOCs 1,1-Dichloroethane ug/L VOCs 1,1-Dichloroethene 7

ug/L VOCs 1,2,4-Trichlorobenzene 70 ug/L VOCs 1,2-Dibromo-3-chloropropane 0.2 ug/L VOCs 1,2-Dibromoethane 0.05 ug/L VOCs 1,2-Dichlorobenzene 600 ug/L VOCs 1,2-Dichloroethane 5

ug/L VOCs 1,2-Dichloropropane 5

ug/L VOCs 1,3-Dichlorobenzene ug/L VOCs 1,4-Dichlorobenzene 75 ug/L VOCs 2-Butanone ug/L VOCs 2-Hexanone ug/L VOCs 4-Methyl-2-pentanone ug/L VOCs Acetone ug/L VOCs Benzene 5

ug/L VOCs Bromodichloromethane ug/L VOCs Bromoform ug/L VOCs Bromomethane ug/L VOCs Carbon disulfide ug/L VOCs Carbon tetrachloride 5

ug/L VOCs Chlorobenzene 100 ug/L VOCs Chloroethane ug/L VOCs Chloroform ug/L VOCs Chloromethane ug/L VOCs cis-1,2-Dichloroethene 70 ug/L VOCs cis-1,3-Dichloropropene ug/L VOCs Cyclohexane ug/L VOCs Dibromochloromethane ug/L VOCs Dichlorodifluoromethane ug/L VOCs Ethylbenzene 700 ug/L VOCs Methyl acetate ug/L VOCs Methyl tert-butyl ether ug/L VOCs Methylcyclohexane ug/L VOCs Methylene chloride 5

ug/L VOCs Styrene 100 ug/L VOCs Tetrachloroethene 5

ug/L VOCs Toluene 1000 ug/L VOCs trans-1,2-Dichloroethene 100 ug/L VOCs trans-1,3-Dichloropropene ug/L VOCs Trichloroethene 5

ug/L VOCs Trichlorofluoromethane ug/L VOCs Vinyl chloride 2

ug/L VOCs Xylenes, Total 10000 ug/L W-39 W-40 W-41R W-42 W-43 W-44 W-45 W-46 W-47 W-48 W-48 W-49 W-49 W-50 W-51 W-52 W-53 W-54 W-54 W-55 W-56 W-57 W-58 W-59 W-60 W-61 W-62 W-63 W-64 W-65 W-66 W-67 W-68 10/18/2019 10/15/2019 10/14/2019 10/22/2019 10/18/2019 10/14/2019 10/2/2019 10/21/2019 10/17/2019 10/21/2019 10/21/2019 10/24/2019 10/24/2019 10/15/2019 10/3/2019 10/3/2019 10/3/2019 10/4/2019 10/4/2019 10/4/2019 10/4/2019 10/3/2019 10/4/2019 10/5/2019 10/17/2019 10/17/2019 10/22/2019 10/21/2019 10/17/2019 10/17/2019 10/17/2019 10/18/2019 10/22/2019 N

N N

N FD N

FD N

N N

FD N

N N

N

< 8.0

< 4.0

< 4.0 4.4

< 4.0

< 0.80

< 4.0

< 0.80

< 4.0

< 0.80

< 0.80 1.7

< 0.80

< 0.80 1.0

< 0.80

< 4.0

< 20

< 4.0

< 0.80

< 4.0

< 0.80

< 0.80 15

< 0.80

< 4.0

< 20

< 0.80

< 0.80 1.1

< 0.80

< 0.80 5.2

< 0.80

< 4.0

< 0.80

< 5.0

< 1.0

< 1.0 1.5

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 50

< 10

< 50

< 10

< 50

< 10

< 50

< 10

< 50

< 10

< 50

< 10

< 100

< 20

< 100

< 20

< 5.0

< 1.0

< 1.0 1.2

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 10

< 2.0

< 10

< 2.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 10

< 2.0

< 10

< 2.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 1.0 13

< 1.0 4.4

< 1.0

< 1.0 2.1 2.0

< 1.0

< 1.0 1.0

< 1.0

< 1.0 13 22 1.5

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 10

< 2.0

< 10

< 2.0

< 5.0

< 1.0

< 1.0 2.3

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 25

< 5.0

< 25

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 1.0 290

< 1.0 190

< 1.0

< 1.0 2.5 1.6 200 200

< 1.0

< 1.0 42 1.0 1.3 220 480 49 110

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 1.0 5.2

< 1.0 14

< 1.0

< 1.0 4.9 4.7

< 1.0

< 1.0 1.1

< 1.0 84 8.5 8.4 1.8

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 5.0

< 1.0

< 1.0 Page 4 of 6

Table A1 - October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Radiological Alpha particles 15**

pCi/L Radiological Beta particles 50**

pCi/L Radiological Tritium pCi/L Radiological Technetium-99 900 pCi/L Radiological Uranium-233/234 pCi/L Radiological Uranium-235/236 pCi/L Radiological Uranium-238 pCi/L Radiological Percent Uranium-235 Radiological Uranium-234 ug/L Radiological Uranium-235 ug/L Radiological Uranium-238 ug/L Radiological Total Uranium Isotopes 30 ug/L Chemical Fluoride 4

mg/L Chemical Nitrate as N 10 mg/L Chemical Ammonia as N mg/L Metals Aluminum ug/L Metals Antimony 6

ug/L Metals Arsenic 10 ug/L Metals Barium 2000 ug/L Metals Beryllium 4

ug/L Metals Cadmium 5

ug/L Metals Calcium ug/L Metals Chromium 100 ug/L Metals Cobalt ug/L Metals Copper 1300 ug/L Metals Iron ug/L Metals Lead 15 ug/L Metals Magnesium ug/L Metals Manganese ug/L Metals Mercury 2

ug/L Metals Nickel ug/L Metals Potassium ug/L Metals Selenium 50 ug/L Metals Silver ug/L Metals Sodium ug/L Metals Thallium 2

ug/L Metals Vanadium ug/L Metals Zinc ug/L SVOCs 1,1'-Biphenyl ug/L SVOCs 2,4,5-Trichlorophenol ug/L SVOCs 2,4,6-Trichlorophenol ug/L SVOCs 2,4-Dichlorophenol ug/L SVOCs 2,4-Dimethylphenol ug/L SVOCs 2,4-Dinitrophenol ug/L SVOCs 2,4-Dinitrotoluene ug/L SVOCs 2,6-Dinitrotoluene ug/L SVOCs 2-Chloronaphthalene ug/L SVOCs 2-Chlorophenol ug/L SVOCs 2-Methylnaphthalene ug/L SVOCs 2-Methylphenol ug/L SVOCs 2-Nitroaniline ug/L SVOCs 2-Nitrophenol ug/L SVOCs 3,3'-Dichlorobenzidine ug/L SVOCs 3-Nitroaniline ug/L SVOCs 4,6-Dinitro-2-methylphenol ug/L SVOCs 4-Bromophenyl phenyl ether ug/L SVOCs 4-Chloro-3-methylphenol ug/L SVOCs 4-Chloroaniline ug/L SVOCs 4-Chlorophenyl phenyl ether ug/L SVOCs 4-Methylphenol ug/L SVOCs 4-Nitroaniline ug/L SVOCs 4-Nitrophenol ug/L SVOCs Acenaphthene ug/L SVOCs Acenaphthylene ug/L SVOCs Acetophenone ug/L SVOCs Anthracene ug/L SVOCs Atrazine 3

ug/L SVOCs Benz(a)anthracene ug/L SVOCs Benzaldehyde ug/L SVOCs Benzo(a)pyrene 0.2 ug/L SVOCs Benzo(b)fluoranthene ug/L SVOCs Benzo(g,h,i)perylene ug/L SVOCs Benzo(k)fluoranthene ug/L SVOCs Bis(2-chloroethoxy)methane ug/L SVOCs Bis(2-chloroethyl)ether ug/L SVOCs Bis(2-chloroisopropyl)ether ug/L SVOCs Bis(2-ethylhexyl)phthalate 6

ug/L SVOCs Butyl benzyl phthalate ug/L Well Date Type W-69 W-70 W-71 W-72 W-73 W-74 W-75 W-76 W-77 W-78 W-79 W-80 W-81 W-82 W-83 W-84 W-85 W-86 W-87 W-88 W-89 W-90 W-92 W-93 W-94 W-95 W-96 W-97 WSW-01*

WSW-02*

WSW-03*

WSW-04*

10/23/2019 10/23/2019 10/23/2019 10/4/2019 10/4/2019 10/9/2019 10/9/2019 10/5/2019 10/6/2019 10/5/2019 10/7/2019 10/6/2019 10/8/2019 10/8/2019 10/8/2019 10/8/2019 10/23/2019 10/23/2019 10/2/2019 10/22/2019 10/22/2019 10/22/2019 10/10/2019 10/6/2019 10/15/2019 10/15/2019 10/11/2019 10/11/2019 10/15/2019 10/22/2019 10/24/2019 10/24/2019 N

N N

N 2.31 #

0.0198 #

0.983 #

1.05 #

0.241 #

0 ##

2.10 #

2.77 #

865 0 ##

2.99 #

1.30 #

0 ##

1.37 #

0.300 #

0 ##

1.42 #

0.317 #

1.68 #

2.50 #

0.498 #

0.889 #

1.58 #

3.06 1.14 #

0.695 #

2.51 #

0.168 #

0.599 #

0.876 #

3.63 7.11 1.94 #

1.37 #

8.11 2.74 #

1.85 #

1.29 #

3.89 #

6.88 111 4.12 #

5.90 7.29 1.23 #

4.82 2.75 #

3.97 #

1.23 #

7.12 4.92 2.05 #

0 ##

23.1 3.78 #

8.18 2.48 #

0.814 #

4.36 11.0 0 ##

8.80 2.05 #

2.69 #

0 ##

21.4 #

12.2 #

0 ##

11.5 #

0 ##

101 0 ##

3.52 #

2.56 #

0 ##

0.914 #

0 ##

19.3 #

8.88 #

0.787 #

6.34 #

27.5 #

6.68 #

0 ##

20.4 #

2.35 #

0 ##

10.3 #

17.4 #

0.279 #

0.857 #

8.56 #

0.366 0.188 #

0.228 #

0.125 #

0 ##

0.111 #

0.0135 #

1.60 511 0.0921 #

0.0539 #

0.154 #

0.00840 #

0.0453 #

0.603 0.0661 #

0.0494 #

0.125 #

0.175 #

0.107 #

0.209 #

0.0370 #

0.0426 #

0.115 #

0.0614 #

0.0378 #

0.0695 #

0.106 #

0.315 #

0.0341 #

0.286 #

0.236 #

0.118 #

0 ##

0.0113 #

0 ##

0.0655 #

0.00238 #

0.0780 #

0 ##

26.0 0.0466 #

0 ##

0.0254 #

0 ##

0 #

0.161 #

0.0491 #

0.0621 #

0.130 #

0.00163 #

0.0449 #

0 ##

0.0653 #

0 ##

0.0644 #

0 ##

0.0692 #

0.108 #

0.0403 #

0 ##

0.104 #

0.0518 #

0.0774 #

0.201 #

0.0615 #

0.0743 #

0.0205 #

0.121 #

0.0963 #

0.00143 #

0.354 81.0 0.105 #

0.115 #

0.0695 #

0.112 #

0.140 #

0 ##

0.0502 #

0.137 #

0.151 #

0.185 #

0 ##

0.0765 #

0.0900 #

0.0262 #

0.0560 #

0.0719 #

0.0495 #

0.158 #

0.0506 #

0.788 0.342 0 #

0 #

4.75 0 #

0 #

< 0.050

< 0.050 0.089

< 0.050

< 0.070

< 0.070 0.0308 J 10.1

< 0.070

< 0.200

< 0.200 0.165 J 0.095 J 0.0831 J

< 0.200

< 0.200 0.915 237 0.0933 J 0.0892 J 0.151 J 0.0728 J 0.151 J

< 0.200 0.0704 J

< 0.200

< 0.200 0.457

< 0.200

< 0.200 0.114 J

< 0.200

< 0.200 0.272

< 0.200 0.776 0.482

< 0.200

< 0.200 0.165 J 0.095 J 0.0831 J

< 0.200

< 0.200 0.946 247 0.0933 J 0.0892 J 0.151 J 0.0728 J 0.151 J

< 0.200 0.0704 J

< 0.200

< 0.200 0.457

< 0.200

< 0.200 0.114 J

< 0.200

< 0.200 0.272

< 0.200 0.776 0.482 0.022

< 0.100 0.084 0.116 0.071 0.019 0.109 1.45 9.21 13.4 2.4 1.57 0.042 0.046 0.079 0.087 0.23 0.511 0.278 0.012 0.011 0.039 0.099 0.043 0.043 0.077 0.111 0.375 0.023 0.103 0.013 0.013 0.16 1.4 0.021 1.5 2.0 4.9 0.063 9.8 12 3.5 4.0 8.3 3.1 0.99 0.76

< 0.020 0.039

< 0.020 0.055 4.5 2.5 2.3 0.029 5.3

< 0.020 0.024 0.054 3.4 0.020

< 0.020

< 0.020 0.067 0.0341 0.0077 0.0149 0.275 0.0167 0.159 0.391 0.0154 7.11 0.0271 0.0146 0.0927 0.0762 0.0275 0.0099 0.0119 0.03 0.0073 0.0127 0.0127 0.0132 0.0147 3.19 0.0324 0.246 0.145 0.228 4.89 0.0639 0.0273 0.0655 0.0166

< 200

< 200 126 J

< 200

< 200 894 750 1320 878 1210

< 200 107 J

< 200

< 200 419 382

< 200

< 200 82.7 J

< 200

< 200 78.3 J

< 20.0

< 20.0 7.15 J 5.12 J 3.54 J 4.18 J 4.12 J 5.99 J 3.53 J 3.58 J 5.15 J 5.32 J

< 20.0 7.19 J

< 20.0

< 20.0 6.48 J

< 20.0 5.21 J

< 20.0

< 20.0 4.77 J

< 20.0

< 20.0 3.97 J

< 20.0 5.89 J

< 20.0

< 30.0

< 30.0 7.94 J 5.58 J

< 30.0

< 30.0 68.9 91.2 22 48.9 79 151 104 129 70.9 54.4 75.4 124 266 162 114 215 236 101 89.8 90.5 94 101 165 91.2 114 120 128 155 3.87 J 27.1 2.78 J 7.43

< 5.00 1.17 J

< 5.00

< 5.00 1.49 J

< 5.00

< 5.00 1.41 J 1.59 J

< 5.00

< 5.00 1.26 J

< 5.00

< 5.00 2480 3170 4300 11900 9540 6700 12900 4430 9350 7500 11200 17000 6000 1520 4120 5960 9410 2060 5440 5450 4380 3540 6100 5470 5440 6230 8750 7250 380 1990 330 288

< 10.0

< 10.0 1.59 J 1.66 J

< 10.0

< 10.0 1.12 J 2.55 J

< 10.0 1.86 J

< 10.0

< 10.0 1.02 J

< 10.0 2.85 J

< 10.0

< 10.0 8.08 9.91

< 5.00 5.27 6.27 3.43 J 29.2 1.41 J 1.27 J

< 5.00

< 5.00 6.06 10.3 17.3 10 19 2.69 J 3.99 J 4.87 J 1.08 J 1.08 J 1.62 J

< 5.00 3.97 J 1.3 J 2.24 J 3.35 J 1.05 J 1.99 J

< 5.00 4.45 J 3.66 J

< 20.0

< 20.0 9.06 J

< 20.0

< 20.0 10 J

< 20.0

< 20.0 26.3 22.2 33.2 4120 38.5 J 5910 1070 299 44.6 J 4590

< 100 223

< 100

< 100 230 18800 3030 226 2710 23900 7810 3160

< 100

< 100 21200

< 100 20900 42900 32300 492

< 100 7050

< 100

< 20.0

< 20.0 5.18 J

< 20.0

< 20.0 7.16 J

< 20.0

< 20.0 4.88 J

< 20.0

< 20.0 3.91 J 5.63 J 5.14 J 794 1410 745 3760 4600 3050 5220 1510 1970 1420 5490 5240 1930 902 2200 2390 3970 1180 1770 1840 1940 1300 4490 3060 2490 3880 4150 3420 184 J 970 157 J 190 J 412 90.4 81.6 992 454 134 740 32.9 5.83 J 2.83 J 12.8 118 385 227 170 1060 242 39.6 386 6.1 J 7.45 J 16.5 687 171 431 538 880 98.9 3.99 J 106 3.95 J 4.84 J

< 0.200

< 0.200 1.94 J 4.49 J

< 5.00 9.31 99.7 21.1 315 1.8 J 8.14

< 5.00

< 5.00 1.88 J 2.31 J 2.93 J 2.44 J 2.19 J

< 5.00 1.64 J

< 5.00 1.54 J

< 5.00

< 5.00 2.76 J 1.94 J 2.33 J

< 5.00 3.18 J 2.09 J 1.74 J 5.23 5.64 840 2190 7080 3260 2400 3030 3910 3900 6270 4090 4490 7300 4760 1830 1360 1720 1620 174 2250 2010 1680 1710 1630 2830 1110 1190 2020 3780 687 1020 582 879

< 30.0

< 30.0 12.9 J

< 30.0 7.38 J

< 30.0

< 30.0 8.62 J 8.57 J 12.2 J

< 30.0

< 30.0 6.14 J 9.95 J

< 30.0

< 30.0 6.47 J

< 30.0

< 30.0 15.3 J

< 30.0

< 5.00

< 5.00 1.73 J

< 5.00

< 5.00 1.05 J

< 5.00

< 5.00 1.54 J 1.23 J

< 5.00 1.44 J

< 5.00

< 5.00 13600 3580 10800 12400 10200 10900 7670 22200 277000 45500 11500 53600 16800 25600 23200 25600 46200 51000 32500 6330 3430 6810 15800 11700 8060 9960 18300 20800 1620 5130 1740 1140

< 20.0

< 5.00

< 5.00 11.5 7.88

< 5.00

< 5.00 1.25 J

< 5.00

< 5.00 1.57 J 1.1 J 2.74 J

< 5.00

< 5.00 14.4 J 12.2 J

< 20.0 8.31 J 10.8 J 14.5 J 13.3 J 5.89 J 28.5 8.47 J 4.87 J 8.47 J 4.59 J 13.1 J 8.73 J 13.9 J 3.73 J 3.59 J 7.31 J 10.3 J

< 20.0 6.93 J 3.97 J 12 J 4.18 J

< 20.0 6 J 9.02 J 5.83 J 13.4 J 37 116

< 4.0

< 8.0

< 4.0

< 20

< 8.0

< 4.0

< 0.80

< 4.0

< 8.0

< 4.0

< 8.0

< 20

< 4.0

< 8.0

< 4.0

< 8.0

< 20

< 0.80

< 4.0

< 0.80

< 4.0

< 0.80

< 8.0

< 0.80

< 4.0

< 4.0 Page 5 of 6

Table A1 - October 2019 Groundwater Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte MCL Units Well Date Type SVOCs Caprolactam ug/L SVOCs Carbazole ug/L SVOCs Chrysene ug/L SVOCs Di-n-butyl phthalate ug/L SVOCs Di-n-octyl phthalate ug/L SVOCs Dibenz(a,h)anthracene ug/L SVOCs Dibenzofuran ug/L SVOCs Diethyl phthalate ug/L SVOCs Dimethyl phthalate ug/L SVOCs Fluoranthene ug/L SVOCs Fluorene ug/L SVOCs Hexachlorobenzene 1

ug/L SVOCs Hexachlorobutadiene ug/L SVOCs Hexachlorocyclopentadiene 50 ug/L SVOCs Hexachloroethane ug/L SVOCs Indeno(1,2,3-cd)pyrene ug/L SVOCs Isophorone ug/L SVOCs N-Nitrosodi-n-propylamine ug/L SVOCs N-Nitrosodiphenylamine ug/L SVOCs Naphthalene ug/L SVOCs Nitrobenzene ug/L SVOCs Pentachlorophenol 1

ug/L SVOCs Phenanthrene ug/L SVOCs Phenol ug/L SVOCs Pyrene ug/L VOCs (1-Methylethyl)-Benzene ug/L VOCs 1,1,1-Trichloroethane 200 ug/L VOCs 1,1,2,2-Tetrachloroethane ug/L VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/L VOCs 1,1,2-Trichloroethane 5

ug/L VOCs 1,1-Dichloroethane ug/L VOCs 1,1-Dichloroethene 7

ug/L VOCs 1,2,4-Trichlorobenzene 70 ug/L VOCs 1,2-Dibromo-3-chloropropane 0.2 ug/L VOCs 1,2-Dibromoethane 0.05 ug/L VOCs 1,2-Dichlorobenzene 600 ug/L VOCs 1,2-Dichloroethane 5

ug/L VOCs 1,2-Dichloropropane 5

ug/L VOCs 1,3-Dichlorobenzene ug/L VOCs 1,4-Dichlorobenzene 75 ug/L VOCs 2-Butanone ug/L VOCs 2-Hexanone ug/L VOCs 4-Methyl-2-pentanone ug/L VOCs Acetone ug/L VOCs Benzene 5

ug/L VOCs Bromodichloromethane ug/L VOCs Bromoform ug/L VOCs Bromomethane ug/L VOCs Carbon disulfide ug/L VOCs Carbon tetrachloride 5

ug/L VOCs Chlorobenzene 100 ug/L VOCs Chloroethane ug/L VOCs Chloroform ug/L VOCs Chloromethane ug/L VOCs cis-1,2-Dichloroethene 70 ug/L VOCs cis-1,3-Dichloropropene ug/L VOCs Cyclohexane ug/L VOCs Dibromochloromethane ug/L VOCs Dichlorodifluoromethane ug/L VOCs Ethylbenzene 700 ug/L VOCs Methyl acetate ug/L VOCs Methyl tert-butyl ether ug/L VOCs Methylcyclohexane ug/L VOCs Methylene chloride 5

ug/L VOCs Styrene 100 ug/L VOCs Tetrachloroethene 5

ug/L VOCs Toluene 1000 ug/L VOCs trans-1,2-Dichloroethene 100 ug/L VOCs trans-1,3-Dichloropropene ug/L VOCs Trichloroethene 5

ug/L VOCs Trichlorofluoromethane ug/L VOCs Vinyl chloride 2

ug/L VOCs Xylenes, Total 10000 ug/L W-69 W-70 W-71 W-72 W-73 W-74 W-75 W-76 W-77 W-78 W-79 W-80 W-81 W-82 W-83 W-84 W-85 W-86 W-87 W-88 W-89 W-90 W-92 W-93 W-94 W-95 W-96 W-97 WSW-01*

WSW-02*

WSW-03*

WSW-04*

10/23/2019 10/23/2019 10/23/2019 10/4/2019 10/4/2019 10/9/2019 10/9/2019 10/5/2019 10/6/2019 10/5/2019 10/7/2019 10/6/2019 10/8/2019 10/8/2019 10/8/2019 10/8/2019 10/23/2019 10/23/2019 10/2/2019 10/22/2019 10/22/2019 10/22/2019 10/10/2019 10/6/2019 10/15/2019 10/15/2019 10/11/2019 10/11/2019 10/15/2019 10/22/2019 10/24/2019 10/24/2019 N

N N

N

< 8.0

< 4.0

< 0.80

< 4.0

< 0.80

< 4.0

< 0.80

< 4.0

< 20

< 4.0

< 0.80

< 4.0

< 0.80

< 4.0

< 20

< 0.80

< 4.0

< 0.80

< 1.0

< 10

< 20

< 1.0

< 1.0 1.2

< 1.0

< 1.0 3.4

< 1.0

< 1.0 11

< 1.0

< 1.0 3.9

< 1.0

< 2.0

< 1.0

< 1.0 2.1

< 1.0

< 2.0

< 1.0

< 1.0 11

< 1.0

< 1.0 1.3

< 1.0

< 1.0 1.0 1.9

< 1.0

< 1.0 2.0

< 1.0

< 1.0 5.3 4.3

< 1.0

< 1.0 3.6

< 1.0

< 1.0 1.8

< 1.0

< 2.0

< 1.0

< 5.0

< 1.0

< 1.0 19

< 1.0

< 1.0 38 4.1 2.1

< 1.0

< 1.0 24

< 1.0

< 1.0 4.3

< 1.0

< 1.0 4.5

< 1.0 63

< 1.0

< 1.0 11

< 1.0

< 1.0 2.8

< 1.0

< 1.0 1.2

< 1.0

< 1.0 2.9

< 1.0

< 1.0 Notes:

- private water supply well groundwater sample

- - site-specific action level N - normal sample FD - field duplicate sample MCL - Maximum Contaminant Level Bold concentrations indicate detections Concentrations in shaded cells exceed their MCL NA - not analyzed

- value is below minimum detectable concentration

1. - value is reported as a negative number pCi/L - picocuries per liter ug/L - micrograms per liter mg/L - milligrams per liter SVOCs - semivolatile organic compounds VOCs - volatile organic compounds J - Estimated result is less than the practical quantitation limit and greater than the method detection limit Page 6 of 6

Table A2 - Surface Water Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SW-11 SW-12 SW-13 SW-14 SW-16 SW-17 SW-17 SW-18 SW-19 SW-20 SW-21 SW-21 SW-22 SW-22 SW-23 N

N N

N FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/17/2019 7/15/2019 7/17/2019 7/16/2019 Group Analyte MCL Unit Radiological Technetium-99 900 pCi/L 0 ##

0 ##

3.73 #

0 ##

1.29 #

0 ##

NA 0 ##

13.6 #

Radiological Uranium-233/234 pCi/L 0.296 0.0491 #

0.0159 #

0.575 3.34 0.145 #

0.204 #

0.285 #

0.587 2.35 0.0905 #

NA 0.187 #

NA 0.0557 #

Radiological Uranium-235/236 pCi/L 0.0959 #

0.00914 #

0 #

0.101 #

0.145 0 ##

0 #

0.0501 #

0.0192 #

0.123 0.0804 #

NA 0 #

NA 0 ##

Radiological Uranium-238 pCi/L 0.105 #

0.101 #

0 ##

0.0793 #

0.710 0.150 #

0.0925 #

0.159 #

0.168 #

0.626 0.0508 #

NA 0.0611 #

NA 0.103 #

Radiological Total Uranium 30 ug/L 0.365

< 0.2 0.134 0.297 1.78 0.246 0.229 0.304 0.524 1.14 0.160 NA 0.199 NA 0.0673 Radiological Uranium-234 ug/L

< 0.050

< 0.050 NA

< 0.050 Radiological Uranium-235 ug/L

< 0.070

< 0.070 0.0682 J

< 0.070

< 0.070 0.0174 J 0.0274 J

< 0.070 NA

< 0.070 Radiological Uranium-238 ug/L 0.365

< 0.200 0.134 J 0.297 1.71 0.246 0.229 0.304 0.507 1.11 0.16 J NA 0.199 J NA 0.0673 J Chemical Ammonia mg/L 0.546 0.228 0.249 0.233 4.35 0.290 0.290 0.208 0.376 0.640 0.244 NA 0.187 NA 0.459 Chemical Fluoride 4

mg/L 0.146 0.296 0.226 0.234 1.69 0.460 0.471 0.309 0.154 0.494 0.433 NA 0.432 NA 4.94 Chemical Nitrate as N 10 mg/L

< 0.020

< 0.020 0.63 0.48 3.8 3.8 5.7

< 0.020

< 0.02 NA

< 0.02 NA 7.3 Metals Aluminum ug/L 634 118 J 212 91.3 J 155 J 144 J 141 J 721 337 234 116 J NA 102 J NA 203 Metals Antimony 6

ug/L

< 20.0

< 20.0 NA

< 20.0 Metals Arsenic 10 ug/L

< 30.0

< 30.0 NA

< 30.0 Metals Barium 2000 ug/L 113 52.2 101 66 12.3 85.3 81.8 91.8 67.1 66.3 28.3 NA 34.5 NA 84.4 Metals Beryllium 4

ug/L

< 5.00

< 5.00 NA

< 5.00 Metals Cadmium 5

ug/L

< 5.00

< 5.00 NA

< 5.00 Metals Calcium ug/L 3380 6540 7900 6570 4690 10000 9770 8150 4010 7450 3480 NA 3760 NA 16400 Metals Chromium 100 ug/L 1.47 J

< 10.0 1.25 J

< 10.0 2.64 J

< 10.0

< 10.0 1.19 J

< 10.0

< 10.0 NA

< 10.0 Metals Cobalt ug/L 3.96 J 1.01 J 2.35 J

< 5.00

< 5.00 5.38 2.24 J

< 5.00 NA

< 5.00 Metals Copper 1300 ug/L 3.37 J

< 20.0

< 20.0 NA

< 20.0 Metals Iron ug/L 2410 1110 3820 1180 614 715 682 1260 3890 4710 612 NA 844 NA 69.7 J Metals Lead 15 ug/L

< 20.0

< 20.0 NA

< 20.0 Metals Magnesium ug/L 1030 1340 1490 1240 326 2280 2130 2140 1270 1720 1020 NA 1110 NA 4800 Metals Manganese ug/L 944 1320 1860 275 26.8 86.5 82.9 41 528 642 107 NA 189 NA 73.3 Metals Mercury 2

ug/L 0.081 J

< 0.200

< 0.200 NA

< 0.200 Metals Nickel ug/L 1.82 J

< 5.00

< 5.00 3.5 J 33.4 31.4 14.8 3.17 J 1.7 J 1.86 J NA 1.83 J NA 1.68 J Metals Potassium ug/L 1920 1690 1850 1620 816 2710 2640 2280 3010 3780 1310 NA 1420 NA 6320 Metals Selenium 50 ug/L

< 30.0

< 30.0 NA

< 30.0 Metals Silver ug/L

< 5.00

< 5.00 NA

< 5.00 Metals Sodium ug/L 1980 4860 3780 4530 1090 11300 11200 9550 918 4200 3590 NA 3810 NA 48900 Metals Thallium 2

ug/L

< 20.0

< 20.0 NA

< 20.0 Metals Vanadium ug/L 4.62 J

< 5.00 1.79 J

< 5.00

< 5.00 1.84 J 2.25 J 1.57 J

< 5.00 NA

< 5.00 NA 1.03 J Metals Zinc ug/L 15.2 J 5.55 J 11.4 J 13 J 44.6 15.6 J 14.7 J 15.3 J 8.82 J 7.65 J 5.61 J NA 6.12 J NA 4.54 J SVOCs 1,1'-Biphenyl ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2,4,5-Trichlorophenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2,4,6-Trichlorophenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2,4-Dichlorophenol ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 2,4-Dimethylphenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2,4-Dinitrophenol ug/L

< 20

< 20 NA

< 20 SVOCs 2,4-Dinitrotoluene ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 2,6-Dinitrotoluene ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 2-Chloronaphthalene ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2-Chlorophenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2-Methylnaphthalene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs 2-Methylphenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 2-Nitroaniline ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 2-Nitrophenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 3,3'-Dichlorobenzidine ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 3-Nitroaniline ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 4,6-Dinitro-2-methylphenol ug/L

< 20

< 20 NA

< 20 SVOCs 4-Bromophenyl phenyl ether ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 4-Chloro-3-methylphenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 4-Chloroaniline ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 4-Chlorophenyl phenyl ether ug/L

< 4.0

< 4 NA

< 4.0 SVOCs 4-Methylphenol ug/L

< 4.0

< 4 NA

< 4.0 Location Sample Type Date Page 1 of 3

Table A2 - Surface Water Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SW-11 SW-12 SW-13 SW-14 SW-16 SW-17 SW-17 SW-18 SW-19 SW-20 SW-21 SW-21 SW-22 SW-22 SW-23 N

N N

N FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/17/2019 7/15/2019 7/17/2019 7/16/2019 Group Analyte MCL Unit Location Sample Type Date SVOCs 4-Nitroaniline ug/L

< 8.0

< 8 NA

< 8.0 SVOCs 4-Nitrophenol ug/L

< 20

< 20 NA

< 20 SVOCs Acenaphthene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Acenaphthylene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Acetophenone ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Anthracene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Atrazine 3

ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Benz(a)anthracene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Benzaldehyde ug/L

< 8.0

< 8 NA

< 8.0 SVOCs Benzo(a)pyrene 0.2 ug/L

< 0.80

< 0.80 NA

< 0.80 SVOCs Benzo(b)fluoranthene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Benzo(g,h,i)perylene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Benzo(k)fluoranthene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Bis(2-chloroethoxy)methane ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Bis(2-chloroethyl)ether ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Bis(2-chloroisopropyl)ether ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Bis(2-ethylhexyl)phthalate 6

ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Butyl benzyl phthalate ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Caprolactam ug/L

< 8.0

< 8 NA

< 8.0 SVOCs Carbazole ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Chrysene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Dibenz(a,h)anthracene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Dibenzofuran ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Diethyl phthalate ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Dimethyl phthalate ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Di-n-butyl phthalate ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Di-n-octyl phthalate ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Fluoranthene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Fluorene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Hexachlorobenzene 1

ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Hexachlorobutadiene ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Hexachlorocyclopentadiene 50 ug/L

< 20

< 20 NA

< 20 SVOCs Hexachloroethane ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Indeno(1,2,3-cd)pyrene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Isophorone ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Naphthalene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Nitrobenzene ug/L

< 4.0

< 4 NA

< 4.0 SVOCs N-Nitrosodi-n-propylamine ug/L

< 4.0

< 4 NA

< 4.0 SVOCs N-Nitrosodiphenylamine ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Pentachlorophenol 1

ug/L

< 20

< 20 NA

< 20 SVOCs Phenanthrene ug/L

< 0.80

< 0.8 NA

< 0.80 SVOCs Phenol ug/L

< 4.0

< 4 NA

< 4.0 SVOCs Pyrene ug/L

< 0.80

< 0.8 NA

< 0.80 VOCs (1-Methylethyl)-Benzene ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,1,1-Trichloroethane 200 ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,1,2,2-Tetrachloroethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,1,2-Trichloroethane 5

ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,1-Dichloroethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,1-Dichloroethene 7

ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,2,4-Trichlorobenzene 70 ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,2-Dibromo-3-chloropropane 0.2 ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,2-Dibromoethane 0.05 ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,2-Dichlorobenzene 600 ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,2-Dichloroethane 5

ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,2-Dichloropropane 5

ug/L

< 1.0

< 1 NA

< 1.0 Page 2 of 3

Table A2 - Surface Water Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SW-11 SW-12 SW-13 SW-14 SW-16 SW-17 SW-17 SW-18 SW-19 SW-20 SW-21 SW-21 SW-22 SW-22 SW-23 N

N N

N FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/17/2019 7/15/2019 7/17/2019 7/16/2019 Group Analyte MCL Unit Location Sample Type Date VOCs 1,3-Dichlorobenzene ug/L

< 1.0

< 1 NA

< 1.0 VOCs 1,4-Dichlorobenzene 75 ug/L

< 1.0

< 1 NA

< 1.0 VOCs 2-Butanone ug/L

< 10

< 10 NA

< 10 VOCs 2-Hexanone ug/L

< 10

< 10 NA

< 10 VOCs 4-Methyl-2-pentanone ug/L

< 10

< 10 NA

< 10 VOCs Acetone ug/L

< 20

< 20 NA

< 20 VOCs Benzene 5

ug/L

< 1.0

< 1 NA

< 1.0 VOCs Bromodichloromethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs Bromoform ug/L

< 1.0

< 1 NA

< 1.0 VOCs Bromomethane ug/L

< 2.0

< 2 NA

< 2.0 VOCs Carbon disulfide ug/L

< 1.0

< 1 NA

< 1.0 VOCs Carbon tetrachloride 5

ug/L

< 1.0

< 1 NA

< 1.0 VOCs Chlorobenzene 100 ug/L

< 1.0

< 1 NA

< 1.0 VOCs Chloroethane ug/L

< 2.0

< 2 NA

< 2.0 VOCs Chloroform ug/L

< 1.0

< 1 NA

< 1.0 VOCs Chloromethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs cis-1,2-Dichloroethene 70 ug/L

< 1.0

< 1 NA

< 1.0 VOCs cis-1,3-Dichloropropene ug/L

< 1.0

< 1 NA

< 1.0 VOCs Cyclohexane ug/L

< 1.0

< 1 NA

< 1.0 VOCs Dibromochloromethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs Dichlorodifluoromethane ug/L

< 2.0

< 2 NA

< 2.0 VOCs Ethylbenzene 700 ug/L

< 1.0

< 1 NA

< 1.0 VOCs Methyl acetate ug/L

< 1.0

< 1 NA

< 1.0 VOCs Methyl tert-butyl ether ug/L

< 1.0

< 1 NA

< 1.0 VOCs Methylcyclohexane ug/L

< 5.0

< 5 NA

< 5.0 VOCs Methylene chloride 5

ug/L

< 1.0

< 1 NA

< 1.0 VOCs Styrene 100 ug/L

< 1.0

< 1 NA

< 1.0 VOCs Tetrachloroethene 5

ug/L

< 1.0

< 1.0 16 16 14

< 1.0

< 1 NA

< 1.0 VOCs Toluene 1000 ug/L

< 1.0

< 1 NA

< 1.0 VOCs trans-1,2-Dichloroethene 100 ug/L

< 1.0

< 1 NA

< 1.0 VOCs trans-1,3-Dichloropropene ug/L

< 1.0

< 1 NA

< 1.0 VOCs Trichloroethene 5

ug/L

< 1.0

< 1.0 1.0 1.0

< 1.0

< 1 NA

< 1.0 VOCs Trichlorofluoromethane ug/L

< 1.0

< 1 NA

< 1.0 VOCs Vinyl chloride 2

ug/L

< 1.0

< 1 NA

< 1.0 VOCs Xylenes, Total 10000 ug/L

< 1.0

< 1 NA

< 1.0 Notes:

N - normal sample FD - field duplicate sample MCL - Maximum Contaminant Level Bold concentrations indicate detections Concentrations in shaded cells exceed their MCL NA - not analyzed

- value is below minimum detectable concentration

1. - value is reported as a negative number pCi/L - picocuries per liter ug/L - micrograms per liter mg/L - milligrams per liter SVOCs - semivolatile organic compounds VOCs - volatile organic compounds J - Estimated result is less than the practical quantitation limit and greater than the method detection limit Page 3 of 3

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SED-11 SED-12 SED-13 SED-14 SED-15 SED-16 SED-17 SED-17 SED-18 SED-19 SED-20 SED-21 SED-22 SED-23 SED-24 SED-25 SED-26 SED-27 SED-28 SED-29 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N N

FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/16/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/15/2019 7/16/2019 7/16/2019 7/18/2019 7/18/2019 7/18/2019 7/18/2019 11/20/2019 Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g 0 ##

0 ##

0.0243 #

5.62 #

4.94 #

7.50 #

0 ##

6.28 #

0 ##

4.12 #

0 ##

50.8 35.8 8.55 #

1.68 #

0 ##

5.75 #

0 ##

Radiological Uranium-233/234 13 3310 pCi/g 1.14 0.925 1.67 1.42 2.58 14.9 0.658 1.07 0.219 32.5 62.5 1.86 117 1.35 1.14 907 222 225 254 6.23 Radiological Uranium-235/236 8

39 pCi/g 0.00159 #

0.0647 #

0.156 #

0.0250 #

0.181 0.678 0.0235 #

0.104 #

0.0173 #

2.30 3.12 0.104 #

4.98 0.00261 #

0.0608 #

41.1 11.0 11.9 12.4 0.313 Radiological Uranium-238 14 179 pCi/g 0.742 1.17 1.33 0.389 2.05 2.77 0.302 0.354 0.298 8.18 14.9 1.96 28.0 1.69 0.944 149 46.9 37.4 44.6 2.51 Radiological Uranium-234 ug/kg

< 25.7

< 25.6

< 15.4

< 12.1

< 12.4

< 12.0

< 11.0

< 11.8

< 12.0 4.27 J 12.7 J

< 30.8 22 J

< 14.4

< 15.9 225 129 38.9 J 57.2 J

< 24.3 Radiological Uranium-235 ug/kg 11.5 J 16 J 13.8 J 5.32 J 51.2 114 6.57 J 2.9 J 5 J 451 1310 27.8 J 2230 18.3 J 15.9 J 27100 14200 3970 6770 86.4 Radiological Uranium-238 ug/kg 1320 1700 1360 260 5790 3310 401 140 265 16200 49700 2840 80700 2250 1680 646000 487000 90900 161000 6030 Radiological Total Uranium Isotopes ug/kg 1330 1720 1370 265 5840 3420 408 143 270 16700 51000 2870 83000 2270 1700 673000 501000 94900 168000 6120 Chemical Ammonia mg/kg 723 560 98.5 6.43 49.0 13.5 4.15 3.66 3.48 401 1600 532 978 214 70.5 2270 167 395 1560 455 Chemical Nitrate as N mg/kg 0.33 0.24 0.2

< 0.2

< 0.20 2.7 2.1 0.95

< 0.20 1.2

< 0.20

< 0.2

< 0.20 0.20 0.27 1.4 0.30

< 0.20

< 0.50 Chemical Nitrate ion mg/kg NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA

< 2.45 Chemical Fluoride mg/kg 1.35 J 2.26 J 1.45 J

< 1.21 2.09 8.73 0.908 J 0.814 J

< 1.22 3.51 15.7 2.17 J 4.64 38.1 49.2 53.3 4.61 171 39.3 1.14 J Chemical Solids 35.5 35.2 55.7 76.0 79.3 75.6 86.2 90.4 76.0 36.1 13.6 34 26 57.4 52.2 11.5 64.1 23.3 25.1 35.2 Metals Aluminum mg/kg 10400 10300 8230 502 3510 682 459 340 401 3600 11000 31200 25800 19800 10500 6570 5540 1860 5790 25900 Metals Antimony mg/kg

< 5.29

< 4.93

< 3 0.511 J

< 2.42 0.447 J 0.482 J 0.512 J

< 2.53

< 3.75

< 11.7

< 6

< 6.26

< 2.87

< 2.94 5.01 J 1.22 J 4.79 J 6.81 J

< 4.85 Metals Arsenic mg/kg

< 7.94

< 7.39 2.14 J

< 3.61

< 3.63

< 3.69

< 3.46

< 3.35

< 3.8

< 5.63 4.21 J 6.38 J 4.62 J 3.36 J

< 4.4

< 26.7 0.795 J

< 15.4

< 19.7 4.24 J Metals Barium mg/kg 126 118 131 5.16 15.9 5.1 4.92 4.61 4.9 50.2 140 250 209 127 76.8 103 56 723 1220 207 Metals Beryllium mg/kg 0.718 J 1.13 J 1.02

< 0.601 0.258 J

< 0.614

< 0.577

< 0.558

< 0.634 0.361 J 1.14 J 2.39 2.02 2.09 0.896

< 4.44 0.253 J

< 2.57

< 3.28 1.83 Metals Cadmium mg/kg

< 1.32

< 1.23

< 0.751

< 0.601 0.14 J

< 0.614

< 0.577

< 0.558

< 0.634

< 0.939

< 2.92

< 1.5 0.374 J 0.209 J

< 0.734 2 J 0.61 J

< 2.57

< 3.28

< 1.21 Metals Calcium mg/kg 1110 1020 620 142 452 117 48.5 32.9 21.7 J 375 3550 484 872 770 606 10500 3950 253000 284000 809 Metals Chromium mg/kg 9.99 8.34 18.4 1.24 6.91 1.77 1.02 J 0.576 J 0.606 J 5.32 13.6 40 35.1 29.3 15.2 35.7 49.6 78.9 75.3 33.8 Metals Cobalt mg/kg 4.34 2.97 11.6 0.269 J 1.52

< 0.614 0.175 J 0.326 J

< 0.634 3.92 6.31 18.9 16.6 11.8 5

8.69 2.95 2 J 2.91 J 8.36 Metals Copper mg/kg 7.14 5.39 8.83 0.386 J 2.75 1 J

< 2.31

< 2.23

< 2.53 5.33 19.5 29.8 33.1 18.5 7.79 418 116 20.9 36.4 27.9 Metals Iron mg/kg 7610 4320 15000 581 4630 1070 257 217 217 3770 10200 25900 32500 29500 10100 12300 2840 4310 29100 17600 Metals Lead mg/kg 24 28 13.9 0.865 J 3.74 1.26 J 0.439 J 0.42 J 0.476 J 8.3 25.5 25 37.4 14.4 8.69 45.9 29.3 18.5 91.7 28.2 Metals Magnesium mg/kg 481 279 1240 91.5 194 22.3 J 35.7 14.4 J 15 J 238 751 3320 2180 2980 1220 1180 679 17200 16500 2800 Metals Manganese mg/kg 230 150 332 15.6 54.8 3.72 18 11.9 12.3 123 246 345 389 268 123 97.2 23 102 149 223 Metals Mercury ug/kg 62.3 56.8 15.7 J

< 12.7 5.46 J

< 14.9

< 14.2

< 13.3

< 13.1 34.6 121 75.8 113 40.3 25.8 407 576 287 526 NA Metals Nickel mg/kg 4.13 3.51 7.33 0.341 J 2.21 0.568 J 0.773 0.442 J 0.492 J 8.68 15.5 18.7 43.3 11.5 5.45 86.7 75.1 255 143 15.2 Metals Potassium mg/kg 300 263 538 84.4 200 139 87.4 95.4 90.7 205 664 1890 1410 2010 846 798 170 308 3650 1400 Metals Selenium mg/kg 2.38 J

< 7.39

< 4.51

< 3.61

< 3.63

< 3.69

< 3.46

< 3.35

< 3.8

< 5.63

< 17.5 1.51 J 3.29 J

< 4.31 0.885 J 4.72 J 0.72 J 2.58 J 3.69 J

< 7.27 Metals Silver mg/kg

< 1.32

< 1.23

< 0.751

< 0.601

< 0.606

< 0.614

< 0.577

< 0.558

< 0.634

< 0.939

< 2.92

< 1.5

< 1.56

< 0.718

< 0.734 323 544 10.5 27.6

< 12.1 Metals Sodium mg/kg 34.8 J 42 J 32.5 J 18.8 J 41.4 12.9 J 14.1 J 17.1 J 13.5 J 19.9 J 109 J 119 69.7 J 130 94.7 919 90.4 6330 7260 125 Metals Thallium mg/kg

< 5.29

< 4.93

< 30

< 2.4

< 2.42

< 2.46

< 2.31

< 2.23

< 2.53

< 3.75

< 11.7

< 60

< 62.6

< 28.7

< 29.4

< 17.8

< 2.6

< 10.3

< 13.1

< 48.5 Metals Vanadium mg/kg 25.9 21.6 36.5 1.74 10.5 2.81 1.18 1.43 1.6 13.3 41 100 73.7 70.5 33.5 22.2 7.25 5.71 5.67 85.6 Metals Zinc mg/kg 38.2 23 33.8 5.64 50.8 6.09 2.42 1.24 J 1 J 32.4 63.8 73.1 138 46 22.8 9070 229 523 403 69.1 SVOCs 1,1'-Biphenyl ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2,4,5-Trichlorophenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2,4,6-Trichlorophenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2,4-Dichlorophenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2,4-Dimethylphenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2,4-Dinitrophenol ug/kg

< 320

< 330

< 320

< 310

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 310

< 320

< 1600

< 320

< 1600 SVOCs 2,4-Dinitrotoluene ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 SVOCs 2,6-Dinitrotoluene ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 SVOCs 2-Chloronaphthalene ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2-Chlorophenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2-Methylnaphthalene ug/kg

< 13

< 64

< 13

< 65 SVOCs 2-Methylphenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 2-Nitroaniline ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 SVOCs 2-Nitrophenol ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 SVOCs 3,3'-Dichlorobenzidine ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 3-Nitroaniline ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 SVOCs 4,6-Dinitro-2-methylphenol ug/kg

< 320

< 330

< 320

< 310

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 310

< 320

< 1600

< 320

< 1600 SVOCs 4-Bromophenyl phenyl ether ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 4-Chloro-3-methylphenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 4-Chloroaniline ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 4-Chlorophenyl phenyl ether ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs 4-Methylphenol ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 Location Depth Type Date Page 1 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SED-11 SED-12 SED-13 SED-14 SED-15 SED-16 SED-17 SED-17 SED-18 SED-19 SED-20 SED-21 SED-22 SED-23 SED-24 SED-25 SED-26 SED-27 SED-28 SED-29 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N N

FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/16/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/15/2019 7/16/2019 7/16/2019 7/18/2019 7/18/2019 7/18/2019 7/18/2019 11/20/2019 Group Analyte RUSL IUSL Units Location Depth Type Date SVOCs 4-Nitroaniline ug/kg

< 130

< 120

< 130

< 120

< 630

< 130

< 640 SVOCs 4-Nitrophenol ug/kg

< 320

< 330

< 320

< 310

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 310

< 320

< 1600

< 320

< 1600 SVOCs Acenaphthene ug/kg

< 13

< 64

< 13

< 65 SVOCs Acenaphthylene ug/kg

< 13

< 64

< 13

< 65 SVOCs Acetophenone ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Anthracene ug/kg

< 13

< 13 14

< 13

< 64

< 13 110

< 65 SVOCs Atrazine ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Benz(a)anthracene ug/kg

< 13

< 13 170 13

< 13

< 64

< 13 3400

< 65 SVOCs Benzaldehyde ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Benzo(a)pyrene ug/kg

< 13

< 13 290 20

< 13

< 13 79

< 13 3000

< 65 SVOCs Benzo(b)fluoranthene ug/kg

< 13

< 13 630 37

< 13

< 13 150

< 13 4600

< 65 SVOCs Benzo(g,h,i)perylene ug/kg

< 13

< 13 190 18

< 13

< 64

< 13 1800

< 65 SVOCs Benzo(k)fluoranthene ug/kg

< 13

< 13 200 16

< 13

< 64

< 13 1900

< 65 SVOCs Bis(2-chloroethoxy)methane ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Bis(2-chloroethyl)ether ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Bis(2-chloroisopropyl)ether ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Bis(2-ethylhexyl)phthalate ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320 91 270

< 330 SVOCs Butyl benzyl phthalate ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Caprolactam ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Carbazole ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Chrysene ug/kg

< 13

< 13 310 21

< 13

< 64

< 13 3200

< 65 SVOCs Dibenz(a,h)anthracene ug/kg

< 13

< 64

< 13

< 65 SVOCs Dibenzofuran ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Diethyl phthalate ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Dimethyl phthalate ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Di-n-butyl phthalate ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Di-n-octyl phthalate ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Fluoranthene ug/kg

< 13

< 13 570 36

< 13

< 13 81

< 13 7100

< 65 SVOCs Fluorene ug/kg

< 13

< 64

< 13

< 65 SVOCs Hexachlorobenzene ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Hexachlorobutadiene ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Hexachlorocyclopentadiene ug/kg

< 320

< 330

< 320

< 310

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 310

< 320

< 1600

< 320

< 1600 SVOCs Hexachloroethane ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Indeno(1,2,3-cd)pyrene ug/kg

< 13

< 13 170 15

< 13

< 64

< 13 1600

< 65 SVOCs Isophorone ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Naphthalene ug/kg

< 13

< 64

< 13

< 65 SVOCs Nitrobenzene ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs N-Nitrosodi-n-propylamine ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs N-Nitrosodiphenylamine ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Pentachlorophenol ug/kg

< 320

< 330

< 320

< 310

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 310

< 320

< 1600

< 320

< 1600 SVOCs Phenanthrene ug/kg

< 13

< 13 130

< 13

< 64

< 13 440

< 65 SVOCs Phenol ug/kg

< 66

< 67

< 64

< 67

< 65

< 67

< 64

< 66

< 67

< 66

< 65

< 64

< 320

< 64

< 65

< 330 SVOCs Pyrene ug/kg

< 13

< 13 450 28

< 13

< 13 82

< 13 5600

< 65 VOCs (1-Methylethyl)-Benzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,1,1-Trichloroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,1,2,2-Tetrachloroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,1,2-Trichloroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,1-Dichloroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,1-Dichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,2,4-Trichlorobenzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,2-Dibromo-3-chloropropane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,2-Dibromoethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,2-Dichlorobenzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,2-Dichloroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,2-Dichloropropane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,3-Dichlorobenzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs 1,4-Dichlorobenzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 Page 2 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC SED-11 SED-12 SED-13 SED-14 SED-15 SED-16 SED-17 SED-17 SED-18 SED-19 SED-20 SED-21 SED-22 SED-23 SED-24 SED-25 SED-26 SED-27 SED-28 SED-29 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N N

FD N

N N

N 7/17/2019 7/17/2019 7/17/2019 7/17/2019 7/16/2019 7/17/2019 7/18/2019 7/18/2019 7/16/2019 7/17/2019 7/16/2019 7/15/2019 7/15/2019 7/16/2019 7/16/2019 7/18/2019 7/18/2019 7/18/2019 7/18/2019 11/20/2019 Group Analyte RUSL IUSL Units Location Depth Type Date VOCs 2-Butanone ug/kg

< 25 180

< 24

< 17

< 15

< 16

< 19

< 18 45 45

< 25 32

< 28

< 17 NA NA NA NA

< 21 VOCs 2-Hexanone ug/kg

< 13

< 11

< 12

< 8.7

< 7.6

< 8.2

< 9.6

< 9.5

< 8.9

< 10

< 13

< 12

< 14

< 8.3 NA NA NA NA

< 10 VOCs 4-Methyl-2-pentanone ug/kg

< 13

< 11

< 12

< 8.7

< 7.6

< 8.2

< 9.6

< 9.5

< 8.9

< 10

< 13

< 12

< 14

< 8.3 NA NA NA NA

< 10 VOCs Acetone ug/kg 32 110 30 28

< 15

< 16

< 19

< 18 48 110 67 88 91 25 NA NA NA NA 410 VOCs Benzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Bromodichloromethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Bromoform ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Bromomethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Carbon disulfide ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Carbon tetrachloride ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Chlorobenzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Chloroethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Chloroform ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Chloromethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs cis-1,2-Dichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs cis-1,3-Dichloropropene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Cyclohexane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Dibromochloromethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Dichlorodifluoromethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Ethylbenzene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Methyl acetate ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Methyl tert-butyl ether ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Methylcyclohexane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Methylene chloride ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Styrene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Tetrachloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1 5.5

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Toluene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs trans-1,2-Dichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs trans-1,3-Dichloropropene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Trichloroethene ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Trichlorofluoromethane ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Vinyl chloride ug/kg

< 6.3

< 5.6

< 6.1

< 4.4

< 3.8

< 4.1

< 4.8

< 4.5

< 5.2

< 6.5

< 6.2

< 6.1

< 7.1

< 4.2 NA NA NA NA

< 5.1 VOCs Xylenes, Total ug/kg

< 13

< 11

< 12

< 8.7

< 7.6

< 8.2

< 9.6

< 9.5

< 8.9

< 10

< 13

< 12

< 14

< 8.3 NA NA NA NA

< 10 Page 3 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Radiological Uranium-234 ug/kg Radiological Uranium-235 ug/kg Radiological Uranium-238 ug/kg Radiological Total Uranium Isotopes ug/kg Chemical Ammonia mg/kg Chemical Nitrate as N mg/kg Chemical Nitrate ion mg/kg Chemical Fluoride mg/kg Chemical Solids Metals Aluminum mg/kg Metals Antimony mg/kg Metals Arsenic mg/kg Metals Barium mg/kg Metals Beryllium mg/kg Metals Cadmium mg/kg Metals Calcium mg/kg Metals Chromium mg/kg Metals Cobalt mg/kg Metals Copper mg/kg Metals Iron mg/kg Metals Lead mg/kg Metals Magnesium mg/kg Metals Manganese mg/kg Metals Mercury ug/kg Metals Nickel mg/kg Metals Potassium mg/kg Metals Selenium mg/kg Metals Silver mg/kg Metals Sodium mg/kg Metals Thallium mg/kg Metals Vanadium mg/kg Metals Zinc mg/kg SVOCs 1,1'-Biphenyl ug/kg SVOCs 2,4,5-Trichlorophenol ug/kg SVOCs 2,4,6-Trichlorophenol ug/kg SVOCs 2,4-Dichlorophenol ug/kg SVOCs 2,4-Dimethylphenol ug/kg SVOCs 2,4-Dinitrophenol ug/kg SVOCs 2,4-Dinitrotoluene ug/kg SVOCs 2,6-Dinitrotoluene ug/kg SVOCs 2-Chloronaphthalene ug/kg SVOCs 2-Chlorophenol ug/kg SVOCs 2-Methylnaphthalene ug/kg SVOCs 2-Methylphenol ug/kg SVOCs 2-Nitroaniline ug/kg SVOCs 2-Nitrophenol ug/kg SVOCs 3,3'-Dichlorobenzidine ug/kg SVOCs 3-Nitroaniline ug/kg SVOCs 4,6-Dinitro-2-methylphenol ug/kg SVOCs 4-Bromophenyl phenyl ether ug/kg SVOCs 4-Chloro-3-methylphenol ug/kg SVOCs 4-Chloroaniline ug/kg SVOCs 4-Chlorophenyl phenyl ether ug/kg SVOCs 4-Methylphenol ug/kg Location Depth Type Date SED-29 SED-29 SED-30 SED-30 SED-31 SED-31 SED-32 SED-32 SED-33 SED-33 SED-33 SED-34 SED-34 SED-35 SED-35 SED-36 SED-36 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in N

N N

11/20/2019 11/20/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 0 ##

0 ##

2.43 #

0 ##

0.959 #

0 ##

5.06 #

0 ##

1.81 1.23 5.71 1.41 2.81 2.96 3.71 10.0 5.06 1.27 1.06 3.13 2.93 2.26 1.59 4.40 1.50 0.208 0.175 0.191 0.0337 #

0.0669 #

0.110 #

0.0970 #

0.469 0.394 0.0959 #

0.0461 #

0.131 #

0.0487 #

0.179 0.0433 #

0.210 0.0881 1.55 1.16 2.51 1.28 1.75 1.69 2.00 3.28 2.52 1.56 1.09 1.81 1.73 1.59 1.66 2.38 1.05

< 18.4

< 15.1

< 20.4

< 21.1

< 14.5

< 12.4

< 19.9

< 18.4

< 16.5

< 14.7

< 14.1

< 17.6

< 16.3

< 14.0

< 13.2

< 14.2

< 13.5 21.4 J 17.6 J 85.9 21 J 45.6 18.1 72.9 195 305 21.8 16.5 J 44.9 36.3 36.8 28.9 70.2 19.1 2490 2490 5410 2690 3400 2220 4280 8370 14200 2750 2230 3650 3770 3920 3630 3970 1990 2510 2510 5500 2710 3450 2240 4350 8570 14500 2770 2250 3690 3810 3960 3660 4040 2010 287 230 394 392 286 118 480 576 248 117 67.3 397 336 158 80.1 153 99.1

< 0.50 NA

< 0.50

< 0.50 1.1

< 0.50

< 0.50 NA 0.62

< 0.50

< 0.50 0.55

< 2.07

< 1.48

< 2.09

< 2.30

< 1.44

< 1.30

< 2.02

< 1.88

< 1.74

< 1.54 1.17 J

< 1.93

< 1.72 1.05 J 1.03 J

< 1.44

< 1.32 2.56 2.61 2.26 3.43 3.13 3.07 3.88 4.21 1.57 J 1.56 6.63 2.20 4.26 2.09 4.29

< 1.44

< 1.32 53.0 63.2 50.0 44.7 66.7 74.4 49.0 57.0 56.6 65.6 NA 53.7 60.5 62.2 69.7 64.3 69.6 19800 17000 24000 21700 20400 15500 15200 17600 23200 18200 15500 23600 24200 24800 22100 15300 16100

< 3.53

< 2.97

< 4.08

< 4.41

< 28.4

< 25.6

< 4.15

< 3.44

< 35.6

< 30.3

< 2.73

< 3.59

< 32.8

< 29.9

< 28

< 2.89

< 26.9 2.31 J 2.45 J 3.6 J 2.49 J 4.51 2.85 J 2.47 J 3.35 J 5.43 3.27 J 3.14 J 4.41 J 4.44 J 3.07 J 3.65 J 2.9 J 3.85 J 157 147 174 140 213 239 168 203 167 163 135 174 170 203 178 106 123 1.86 2.13 1.99 2.32 1.69 1.67 1.35 1.53 1.83 2.07 1.63 1.96 2.7 2.05 2.38 1.08 1.43

< 0.884

< 0.743

< 1.02

< 1.1

< 0.709

< 0.641

< 1.04

< 0.86

< 0.89

< 0.756

< 0.682

< 0.898

< 0.82

< 0.747

< 0.701

< 0.723

< 0.673 441 272 424 448 796 679 1140 742 292 182 150 843 762 490 542 256 158 28.3 25.3 32.3 28.3 26.4 22.8 22.6 25.9 28.3 25.6 23.4 28.7 32.7 33.5 27.3 19.3 19.7 5.92 3.7 8.26 4.64 14.3 16.4 9.95 10 11.4 13.8 6.84 15.9 17.5 17.4 19.1 9.08 11.7 17.6 13.1 24.1 17 20.5 17.3 19.6 22.3 21.9 19.3 12.9 26.3 24.8 23.2 24.3 14.9 17.1 12400 9170 15100 10000 28600 30000 18600 21300 29300 29100 16700 32800 32200 30300 35600 22000 30400 15.2 11.3 41.8 13.4 22.9 14.1 24.1 40 20.1 11.7 11.8 31.3 22.3 12.2 13.6 17.5 20.5 2180 971 3240 1400 3080 3110 2440 2570 3060 3590 1370 3110 4000 4450 4410 2320 2840 128 66.2 207 122 788 1090 410 323 295 281 176 906 1020 461 819 260 322 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 10.8 8.4 13.4 9.48 12.2 10.7 11.2 13.9 12.9 12.1 7.21 13.2 14.2 14.7 13.7 8.87 9.48 1060 297 1580 509 1760 1610 1090 1090 1460 1700 443 1320 1290 2130 2050 1200 1400

< 5.3

< 4.46

< 6.12

< 6.61

< 4.26

< 3.84 1.17 J 0.904 J

< 5.34

< 4.54

< 4.09 1.05 J 1.23 J

< 4.48

< 4.2

< 4.34

< 4.04

< 8.84

< 7.43

< 10.2

< 11

< 7.09

< 6.41

< 10.4

< 8.6

< 8.9

< 7.56

< 6.82

< 8.98

< 8.2

< 7.47

< 7.01

< 7.23

< 6.73 97.1 77.7 95.9 110 52.7 52.6 68.2 89.1 85.7 59.7 48.8 64.9 62.5 59.2 58.9 50.9 57.9

< 35.3

< 29.7

< 40.8

< 44.1

< 28.4

< 25.6

< 41.5

< 34.4

< 35.6

< 30.3

< 27.3

< 35.9

< 32.8

< 29.9

< 28

< 28.9

< 26.9 58.6 40.3 71.9 51.2 73.4 61.9 53.5 64.3 81.1 74.4 56.4 86.1 89.1 74.1 82.1 50.3 60.2 43.5 29.8 68.8 31.5 56.2 45.9 62.4 60.7 56.8 52.6 27.6 56.5 60.9 53.1 51.3 39 40.7

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 320 NA

< 1600

< 320

< 310

< 1600

< 320

< 320 NA

< 1600

< 310

< 320

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130

< 320 NA

< 1600

< 320

< 310

< 1600

< 320

< 320 NA

< 1600

< 310

< 320

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130 Page 4 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Location Depth Type Date SVOCs 4-Nitroaniline ug/kg SVOCs 4-Nitrophenol ug/kg SVOCs Acenaphthene ug/kg SVOCs Acenaphthylene ug/kg SVOCs Acetophenone ug/kg SVOCs Anthracene ug/kg SVOCs Atrazine ug/kg SVOCs Benz(a)anthracene ug/kg SVOCs Benzaldehyde ug/kg SVOCs Benzo(a)pyrene ug/kg SVOCs Benzo(b)fluoranthene ug/kg SVOCs Benzo(g,h,i)perylene ug/kg SVOCs Benzo(k)fluoranthene ug/kg SVOCs Bis(2-chloroethoxy)methane ug/kg SVOCs Bis(2-chloroethyl)ether ug/kg SVOCs Bis(2-chloroisopropyl)ether ug/kg SVOCs Bis(2-ethylhexyl)phthalate ug/kg SVOCs Butyl benzyl phthalate ug/kg SVOCs Caprolactam ug/kg SVOCs Carbazole ug/kg SVOCs Chrysene ug/kg SVOCs Dibenz(a,h)anthracene ug/kg SVOCs Dibenzofuran ug/kg SVOCs Diethyl phthalate ug/kg SVOCs Dimethyl phthalate ug/kg SVOCs Di-n-butyl phthalate ug/kg SVOCs Di-n-octyl phthalate ug/kg SVOCs Fluoranthene ug/kg SVOCs Fluorene ug/kg SVOCs Hexachlorobenzene ug/kg SVOCs Hexachlorobutadiene ug/kg SVOCs Hexachlorocyclopentadiene ug/kg SVOCs Hexachloroethane ug/kg SVOCs Indeno(1,2,3-cd)pyrene ug/kg SVOCs Isophorone ug/kg SVOCs Naphthalene ug/kg SVOCs Nitrobenzene ug/kg SVOCs N-Nitrosodi-n-propylamine ug/kg SVOCs N-Nitrosodiphenylamine ug/kg SVOCs Pentachlorophenol ug/kg SVOCs Phenanthrene ug/kg SVOCs Phenol ug/kg SVOCs Pyrene ug/kg VOCs (1-Methylethyl)-Benzene ug/kg VOCs 1,1,1-Trichloroethane ug/kg VOCs 1,1,2,2-Tetrachloroethane ug/kg VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/kg VOCs 1,1,2-Trichloroethane ug/kg VOCs 1,1-Dichloroethane ug/kg VOCs 1,1-Dichloroethene ug/kg VOCs 1,2,4-Trichlorobenzene ug/kg VOCs 1,2-Dibromo-3-chloropropane ug/kg VOCs 1,2-Dibromoethane ug/kg VOCs 1,2-Dichlorobenzene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs 1,2-Dichloropropane ug/kg VOCs 1,3-Dichlorobenzene ug/kg VOCs 1,4-Dichlorobenzene ug/kg SED-29 SED-29 SED-30 SED-30 SED-31 SED-31 SED-32 SED-32 SED-33 SED-33 SED-33 SED-34 SED-34 SED-35 SED-35 SED-36 SED-36 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in N

N N

11/20/2019 11/20/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019

< 130 NA

< 620

< 130

< 120

< 640

< 620

< 130

< 130 NA

< 630

< 120

< 130

< 120

< 130

< 320 NA

< 1600

< 320

< 310

< 1600

< 320

< 320 NA

< 1600

< 310

< 320

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 320 NA

< 1600

< 320

< 310

< 1600

< 320

< 320 NA

< 1600

< 310

< 320

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 320 NA

< 1600

< 320

< 310

< 1600

< 320

< 320 NA

< 1600

< 310

< 320

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 65 NA

< 320

< 66

< 63

< 330

< 320

< 66

< 65 NA

< 330

< 64

< 65

< 64

< 66

< 13 NA

< 63

< 64

< 13

< 65

< 63

< 13

< 13 NA

< 65

< 13

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0 Page 5 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Location Depth Type Date VOCs 2-Butanone ug/kg VOCs 2-Hexanone ug/kg VOCs 4-Methyl-2-pentanone ug/kg VOCs Acetone ug/kg VOCs Benzene ug/kg VOCs Bromodichloromethane ug/kg VOCs Bromoform ug/kg VOCs Bromomethane ug/kg VOCs Carbon disulfide ug/kg VOCs Carbon tetrachloride ug/kg VOCs Chlorobenzene ug/kg VOCs Chloroethane ug/kg VOCs Chloroform ug/kg VOCs Chloromethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs cis-1,3-Dichloropropene ug/kg VOCs Cyclohexane ug/kg VOCs Dibromochloromethane ug/kg VOCs Dichlorodifluoromethane ug/kg VOCs Ethylbenzene ug/kg VOCs Methyl acetate ug/kg VOCs Methyl tert-butyl ether ug/kg VOCs Methylcyclohexane ug/kg VOCs Methylene chloride ug/kg VOCs Styrene ug/kg VOCs Tetrachloroethene ug/kg VOCs Toluene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs trans-1,3-Dichloropropene ug/kg VOCs Trichloroethene ug/kg VOCs Trichlorofluoromethane ug/kg VOCs Vinyl chloride ug/kg VOCs Xylenes, Total ug/kg SED-29 SED-29 SED-30 SED-30 SED-31 SED-31 SED-32 SED-32 SED-33 SED-33 SED-33 SED-34 SED-34 SED-35 SED-35 SED-36 SED-36 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 12 - 16 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in N

N N

11/20/2019 11/20/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/21/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019

< 18

< 24 26 25

< 16

< 17 38 76

< 20 45 NA 28 28

< 18

< 17

< 18

< 20

< 8.9

< 12

< 11

< 12

< 8.0

< 8.3

< 12

< 11

< 10

< 11 NA

< 12

< 10

< 8.9

< 8.5

< 8.8

< 10

< 8.9

< 12

< 11

< 12

< 8.0

< 8.3

< 12

< 11

< 10

< 11 NA

< 12

< 10

< 8.9

< 8.5

< 8.8

< 10 420 370 380 530 410 440 450 440 490 400 NA 200 180 390 310 370 350

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 4.5

< 6.0

< 5.3

< 6.1

< 4.0

< 4.2

< 5.9

< 5.4

< 5.0

< 5.6 NA

< 5.9

< 5.2

< 4.4

< 4.3

< 4.4

< 5.0

< 8.9

< 12

< 11

< 12

< 8.0

< 8.3

< 12

< 11

< 10

< 11 NA

< 12

< 10

< 8.9

< 8.5

< 8.8

< 10 Page 6 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Radiological Uranium-234 ug/kg Radiological Uranium-235 ug/kg Radiological Uranium-238 ug/kg Radiological Total Uranium Isotopes ug/kg Chemical Ammonia mg/kg Chemical Nitrate as N mg/kg Chemical Nitrate ion mg/kg Chemical Fluoride mg/kg Chemical Solids Metals Aluminum mg/kg Metals Antimony mg/kg Metals Arsenic mg/kg Metals Barium mg/kg Metals Beryllium mg/kg Metals Cadmium mg/kg Metals Calcium mg/kg Metals Chromium mg/kg Metals Cobalt mg/kg Metals Copper mg/kg Metals Iron mg/kg Metals Lead mg/kg Metals Magnesium mg/kg Metals Manganese mg/kg Metals Mercury ug/kg Metals Nickel mg/kg Metals Potassium mg/kg Metals Selenium mg/kg Metals Silver mg/kg Metals Sodium mg/kg Metals Thallium mg/kg Metals Vanadium mg/kg Metals Zinc mg/kg SVOCs 1,1'-Biphenyl ug/kg SVOCs 2,4,5-Trichlorophenol ug/kg SVOCs 2,4,6-Trichlorophenol ug/kg SVOCs 2,4-Dichlorophenol ug/kg SVOCs 2,4-Dimethylphenol ug/kg SVOCs 2,4-Dinitrophenol ug/kg SVOCs 2,4-Dinitrotoluene ug/kg SVOCs 2,6-Dinitrotoluene ug/kg SVOCs 2-Chloronaphthalene ug/kg SVOCs 2-Chlorophenol ug/kg SVOCs 2-Methylnaphthalene ug/kg SVOCs 2-Methylphenol ug/kg SVOCs 2-Nitroaniline ug/kg SVOCs 2-Nitrophenol ug/kg SVOCs 3,3'-Dichlorobenzidine ug/kg SVOCs 3-Nitroaniline ug/kg SVOCs 4,6-Dinitro-2-methylphenol ug/kg SVOCs 4-Bromophenyl phenyl ether ug/kg SVOCs 4-Chloro-3-methylphenol ug/kg SVOCs 4-Chloroaniline ug/kg SVOCs 4-Chlorophenyl phenyl ether ug/kg SVOCs 4-Methylphenol ug/kg Location Depth Type Date SED-37 SED-37 SED-37 SED-38 SED-39 SED-40 SED-41 SED-42 SED-43 SED-44 SED-45 SED-46 SED-47 SED-48 SED-48 SED-49 0 - 6 in 6 - 12 in 6 - 12 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N FD N

N N

FD N

11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/26/2019 11/26/2019 11/26/2019 11/26/2019 0 ##

0 ##

16.5 #

0 ##

0.995 #

5.94 #

0 ##

6.23 #

2.83 #

0 ##

4.88 2.04 2.33 3.26 1.86 1.90 1.72 6.12 47.5 8.86 5.86 4.02 3.18 2.57 2.43 4.59 0.254 0.149 0.0456 #

0.204 0.0122 #

0.131 0.0394 #

0.285 2.32 0.377 0.268 0.179 0.232 0.0910 #

0.0144 #

0.215 1.78 1.62 1.38 1.68 1.70 1.24 1.41 2.23 12.1 2.62 2.20 2.15 1.46 1.98 1.62 2.11

< 15.9

< 14.5

< 15.0

< 34.6

< 15.9

< 17.4

< 26.9

< 52.5

< 55.9

< 32.5

< 34.5

< 30.6

< 41.0

< 25.8

< 29.6

< 37.2 102 67.4 31.7 31.8 J 26.4 28.4 17.8 J 156 862 238 100 48.9 44 J 40.3 37.4 J 81.9 4850 3930 2910 3380 3040 3020 2390 7220 31300 9690 4920 3190 2560 3140 2650 4840 4950 4000 2940 3410 3070 3050 2410 7380 32200 9930 5020 3240 2600 3180 2690 4920 451 127 178 576 222 242 466 928 774 389 586 371 1540 806 1080 209

< 0.50

< 0.50 0.66

< 0.5

< 0.50 0.63 0.83 0.50

< 0.50 0.82 0.62 0.59 0.63 0.70 0.58

< 1.57

< 1.50

< 1.57 NA NA NA NA NA NA NA NA NA NA NA NA NA 1.35 J 1.60 0.858 J 5.17 1.90 1.65 J 2.68 J 5.15 J 14.9 3.04 J 7.90 3.41 6.02 2.94 3.46 5.44 54.0 66.1 64.5 72.5 57.4 58.9 32.6 18.4 17.5 26.9 34.7 34.5 22.6 47.5 36.3 29.8 14800 18700 19000 23200 30400 20800 27100 27500 15200 27000 19500 25100 22000 26400 20300 14300

< 3.27

< 28.3

< 30

< 6.96

< 3.32

< 3.48

< 5.62

< 10.3

< 11.5

< 7.06

< 6.5

< 6.1

< 8.72

< 5.01

< 5.68

< 7.62 3.34 J 3.7 J 3.88 J 4.3 J 4.05 J 3.47 J 4.25 J 6.15 J 3.57 J 4.38 J 2.38 J 3.99 J 4.19 J 3.85 J 3.38 J 2.12 J 122 134 142 206 167 137 214 220 105 207 150 103 188 154 146 69.2 1.06 1.38 1.5 2.39 3

1.47 2.01 1.67 J 0.858 J 2.32 1.32 J 1.29 J 1.32 J 1.35 1.19 J 0.727 J

< 0.817

< 0.706

< 0.749

< 1.74

< 0.83

< 0.87

< 1.4

< 2.58

< 2.87

< 1.76

< 1.62

< 1.53

< 2.18

< 1.25

< 1.42

< 1.9 394 346 335 914 297 429 754 1520 813 679 1170 620 737 408 435 258 18.5 22.6 23 24.9 35.4 26.5 29.4 31.4 15.6 29.5 23.6 26 27 26.9 23 13.9 6.86 8.53 8.88 14.3 13 10 26.7 17.8 4.78 10.2 7.42 5.51 7.78 7.53 6.39 3.57 14.7 18.2 19.4 22.1 24.6 19.6 25.8 30.9 16.7 21.7 18.9 19.6 22.3 26.4 26.1 11.3 20500 25700 26800 18400 19900 16100 24300 25100 8080 17100 11900 12100 13200 12400 9320 6750 30.1 20.7 22 13.6 21.1 20.4 21.9 105 16 18.8 40.4 33.8 43.1 37.4 80 11.5 2010 2560 2640 2260 3330 2700 2610 1910 1200 2080 2030 1620 1980 1670 1250 1040 215 219 230 498 210 250 395 463 131 254 224 104 242 249 286 75.9 NA NA NA 72.9 J 56.8 J 55.5 J 72.4 J 119 J

< 273 69.9 J 107 J

< 141 106 J 107 J 118 J 87.2 J 8.54 10 10.2 13.9 16.9 11.3 16.9 16.8 10.2 17.5 11.8 10.6 12.9 11.6 9.87 6.89 1050 1130 1160 1210 1400 1420 1580 1150 684 1230 1010 946 1080 929 708 621 0.899 J

< 4.24

< 4.5

< 10.4

< 4.98

< 5.22

< 8.43

< 15.5

< 17.2

< 10.6

< 9.74

< 9.15

< 13.1

< 7.51

< 8.51

< 11.4

< 8.17

< 7.06

< 7.49

< 17.4

< 8.3

< 8.7

< 14

< 25.8

< 2.87

< 17.6

< 16.2

< 15.3

< 2.18

< 12.5

< 1.42

< 1.9 47 51 60.2 83.1 J 59.9 48.5 69 J 88.6 J 83.9 J 80.7 J 126 105 129 93.6 112 78.4 J

< 32.7

< 28.3

< 30

< 69.6

< 33.2

< 34.8

< 56.2

< 103

< 11.5

< 70.6

< 65

< 61

< 87.2

< 50.1

< 56.8

< 7.62 48.5 67.2 67.9 54.3 71.2 62.7 85.8 95.1 36.5 68.8 49.9 68.1 50.3 65.9 57.7 32.4 37.2 41.1 42 54.5 72.1 49.2 68.9 81 53 56.1 49.1 38.6 49.6 46.4 42.1 27

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 310

< 1600

< 330

< 1600

< 330

< 320

< 310

< 320

< 1600

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 320

< 310

< 1600

< 330

< 1600

< 330

< 320

< 310

< 320

< 1600

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 630 Page 7 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Location Depth Type Date SVOCs 4-Nitroaniline ug/kg SVOCs 4-Nitrophenol ug/kg SVOCs Acenaphthene ug/kg SVOCs Acenaphthylene ug/kg SVOCs Acetophenone ug/kg SVOCs Anthracene ug/kg SVOCs Atrazine ug/kg SVOCs Benz(a)anthracene ug/kg SVOCs Benzaldehyde ug/kg SVOCs Benzo(a)pyrene ug/kg SVOCs Benzo(b)fluoranthene ug/kg SVOCs Benzo(g,h,i)perylene ug/kg SVOCs Benzo(k)fluoranthene ug/kg SVOCs Bis(2-chloroethoxy)methane ug/kg SVOCs Bis(2-chloroethyl)ether ug/kg SVOCs Bis(2-chloroisopropyl)ether ug/kg SVOCs Bis(2-ethylhexyl)phthalate ug/kg SVOCs Butyl benzyl phthalate ug/kg SVOCs Caprolactam ug/kg SVOCs Carbazole ug/kg SVOCs Chrysene ug/kg SVOCs Dibenz(a,h)anthracene ug/kg SVOCs Dibenzofuran ug/kg SVOCs Diethyl phthalate ug/kg SVOCs Dimethyl phthalate ug/kg SVOCs Di-n-butyl phthalate ug/kg SVOCs Di-n-octyl phthalate ug/kg SVOCs Fluoranthene ug/kg SVOCs Fluorene ug/kg SVOCs Hexachlorobenzene ug/kg SVOCs Hexachlorobutadiene ug/kg SVOCs Hexachlorocyclopentadiene ug/kg SVOCs Hexachloroethane ug/kg SVOCs Indeno(1,2,3-cd)pyrene ug/kg SVOCs Isophorone ug/kg SVOCs Naphthalene ug/kg SVOCs Nitrobenzene ug/kg SVOCs N-Nitrosodi-n-propylamine ug/kg SVOCs N-Nitrosodiphenylamine ug/kg SVOCs Pentachlorophenol ug/kg SVOCs Phenanthrene ug/kg SVOCs Phenol ug/kg SVOCs Pyrene ug/kg VOCs (1-Methylethyl)-Benzene ug/kg VOCs 1,1,1-Trichloroethane ug/kg VOCs 1,1,2,2-Tetrachloroethane ug/kg VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/kg VOCs 1,1,2-Trichloroethane ug/kg VOCs 1,1-Dichloroethane ug/kg VOCs 1,1-Dichloroethene ug/kg VOCs 1,2,4-Trichlorobenzene ug/kg VOCs 1,2-Dibromo-3-chloropropane ug/kg VOCs 1,2-Dibromoethane ug/kg VOCs 1,2-Dichlorobenzene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs 1,2-Dichloropropane ug/kg VOCs 1,3-Dichlorobenzene ug/kg VOCs 1,4-Dichlorobenzene ug/kg SED-37 SED-37 SED-37 SED-38 SED-39 SED-40 SED-41 SED-42 SED-43 SED-44 SED-45 SED-46 SED-47 SED-48 SED-48 SED-49 0 - 6 in 6 - 12 in 6 - 12 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N FD N

N N

FD N

11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/26/2019 11/26/2019 11/26/2019 11/26/2019

< 130

< 120

< 640

< 130

< 630

< 130

< 120

< 130

< 120

< 130

< 630

< 320

< 310

< 1600

< 330

< 1600

< 330

< 320

< 310

< 320

< 1600

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64 19

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66 76

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64 21

< 13

< 65

< 64

< 13

< 65

< 13

< 64 28

< 13

< 65

< 64

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64 17

< 13

< 65

< 64

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64 28

< 13

< 65

< 64

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 310

< 1600

< 330

< 1600

< 330

< 320

< 310

< 320

< 1600

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 310

< 1600

< 330

< 1600

< 330

< 320

< 310

< 320

< 1600

< 13

< 65

< 13

< 64

< 13

< 65

< 64

< 65

< 64

< 330

< 66

< 320

< 66

< 63

< 66

< 65

< 64

< 65

< 330

< 320

< 13

< 65

< 13

< 64 27

< 13

< 65

< 64

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1 Page 8 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Location Depth Type Date VOCs 2-Butanone ug/kg VOCs 2-Hexanone ug/kg VOCs 4-Methyl-2-pentanone ug/kg VOCs Acetone ug/kg VOCs Benzene ug/kg VOCs Bromodichloromethane ug/kg VOCs Bromoform ug/kg VOCs Bromomethane ug/kg VOCs Carbon disulfide ug/kg VOCs Carbon tetrachloride ug/kg VOCs Chlorobenzene ug/kg VOCs Chloroethane ug/kg VOCs Chloroform ug/kg VOCs Chloromethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs cis-1,3-Dichloropropene ug/kg VOCs Cyclohexane ug/kg VOCs Dibromochloromethane ug/kg VOCs Dichlorodifluoromethane ug/kg VOCs Ethylbenzene ug/kg VOCs Methyl acetate ug/kg VOCs Methyl tert-butyl ether ug/kg VOCs Methylcyclohexane ug/kg VOCs Methylene chloride ug/kg VOCs Styrene ug/kg VOCs Tetrachloroethene ug/kg VOCs Toluene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs trans-1,3-Dichloropropene ug/kg VOCs Trichloroethene ug/kg VOCs Trichlorofluoromethane ug/kg VOCs Vinyl chloride ug/kg VOCs Xylenes, Total ug/kg SED-37 SED-37 SED-37 SED-38 SED-39 SED-40 SED-41 SED-42 SED-43 SED-44 SED-45 SED-46 SED-47 SED-48 SED-48 SED-49 0 - 6 in 6 - 12 in 6 - 12 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in 0 - 6 in N

N FD N

N N

FD N

11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/22/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/25/2019 11/26/2019 11/26/2019 11/26/2019 11/26/2019

< 20

< 18

< 24

< 19

< 21

< 26

< 27

< 29

< 29 29

< 26 160 39 23

< 28

< 9.8

< 8.9

< 12

< 9.7

< 11

< 13

< 14

< 12

< 13

< 14

< 11

< 10

< 14

< 9.8

< 8.9

< 12

< 9.7

< 11

< 13

< 14

< 12

< 13

< 14

< 11

< 10

< 14 300 350 360 400

< 19 260 96 59 79 57 130 110 410 220 280 300

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 4.9

< 4.5

< 4.4

< 6

< 4.9

< 5.3

< 6.5

< 6.8

< 7.2

< 6.1

< 6.5

< 6.9

< 5.3

< 5.2

< 7.1

< 9.8

< 8.9

< 12

< 9.7

< 11

< 13

< 14

< 12

< 13

< 14

< 11

< 10

< 14 Page 9 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Radiological Technetium-99 19 89400 pCi/g Radiological Uranium-233/234 13 3310 pCi/g Radiological Uranium-235/236 8

39 pCi/g Radiological Uranium-238 14 179 pCi/g Radiological Uranium-234 ug/kg Radiological Uranium-235 ug/kg Radiological Uranium-238 ug/kg Radiological Total Uranium Isotopes ug/kg Chemical Ammonia mg/kg Chemical Nitrate as N mg/kg Chemical Nitrate ion mg/kg Chemical Fluoride mg/kg Chemical Solids Metals Aluminum mg/kg Metals Antimony mg/kg Metals Arsenic mg/kg Metals Barium mg/kg Metals Beryllium mg/kg Metals Cadmium mg/kg Metals Calcium mg/kg Metals Chromium mg/kg Metals Cobalt mg/kg Metals Copper mg/kg Metals Iron mg/kg Metals Lead mg/kg Metals Magnesium mg/kg Metals Manganese mg/kg Metals Mercury ug/kg Metals Nickel mg/kg Metals Potassium mg/kg Metals Selenium mg/kg Metals Silver mg/kg Metals Sodium mg/kg Metals Thallium mg/kg Metals Vanadium mg/kg Metals Zinc mg/kg SVOCs 1,1'-Biphenyl ug/kg SVOCs 2,4,5-Trichlorophenol ug/kg SVOCs 2,4,6-Trichlorophenol ug/kg SVOCs 2,4-Dichlorophenol ug/kg SVOCs 2,4-Dimethylphenol ug/kg SVOCs 2,4-Dinitrophenol ug/kg SVOCs 2,4-Dinitrotoluene ug/kg SVOCs 2,6-Dinitrotoluene ug/kg SVOCs 2-Chloronaphthalene ug/kg SVOCs 2-Chlorophenol ug/kg SVOCs 2-Methylnaphthalene ug/kg SVOCs 2-Methylphenol ug/kg SVOCs 2-Nitroaniline ug/kg SVOCs 2-Nitrophenol ug/kg SVOCs 3,3'-Dichlorobenzidine ug/kg SVOCs 3-Nitroaniline ug/kg SVOCs 4,6-Dinitro-2-methylphenol ug/kg SVOCs 4-Bromophenyl phenyl ether ug/kg SVOCs 4-Chloro-3-methylphenol ug/kg SVOCs 4-Chloroaniline ug/kg SVOCs 4-Chlorophenyl phenyl ether ug/kg SVOCs 4-Methylphenol ug/kg Location Depth Type Date SED-50 SED-51 SED-51 SED-52 SED-52 SED-53 SED-53 SED-54 SED-54 SED-55 SED-55 SED-56 SED-56 SED-56 0 - 6 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 0 - 6 in 6 - 12 in N

N N

N FD N

11/26/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 0.910 #

0 ##

4.89 #

0 ##

1.51 #

0 ##

6.19 #

0 ##

2.53 #

0 ##

3.64 2.10 1.27 1.77 1.88 2.15 2.06 1.78 1.48 2.05 1.62 2.02 2.82 1.89 0.104 #

0.178 #

0.0695 #

0.308 #

0.0494 #

0.194 0.0708 #

0.119 #

0.120 #

0 ##

0.155 0.214 0.115 #

0.0276 #

1.86 1.42 1.15 1.72 1.45 1.45 2.34 1.36 1.87 1.74 1.62 1.40 2.11 1.72

< 31.4

< 31.2

< 28.9

< 21.8

< 23.3

< 17.3

< 14.1

< 37.1

< 25.3

< 18.3

< 16.0

< 17.2

< 18.8

< 16.4 72.1 28.2 J 20.6 J 26.8 J 29.5 J 29.2 24.7 22.6 J 26 J 25.4 J 23.2 23 J 24.5 J 21.7 J 4470 2610 2450 2530 2690 3200 3290 2870 2990 3450 3230 3100 3440 2970 4540 2640 2470 2560 2720 3230 3310 2890 3020 3480 3250 3120 3460 2990 750 692 401 465 271 387 196 854 536 321 223 449 325 244 0.53 0.72 0.51

< 0.50 0.61

< 0.50

< 0.50 0.63 0.68

< 0.50

< 0.50 0.52 0.74

< 0.50 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 4.67 2.77 J 2.96 1.48 J 1.69 J 0.838 J 0.607 J 1.93 J 1.01 J

< 1.88

< 1.76

< 1.89

< 1.96 0.690 J 30.7 34.1 31.5 38.5 30.0 54.0 61.4 23.1 33.7 53.5 61.4 49.9 52.4 62.6 22500 20300 19900 24300 23900 23100 24100 27300 26800 29400 29300 27000 27200 27300

< 6.52

< 5.8

< 5.66

< 4.58

< 4.27

< 3.46

< 31.3

< 7.44

< 5.3

< 3.66

< 3.04

< 3.6

< 3.47

< 3.26 3.64 J 2.25 J 3.3 J 4.4 J 3.09 J 3.44 J 3.75 J 6.54 J 4.47 J 4.6 J 4.56 4.54 J 4.87 J 5.26 178 98 191 144 146 146 151 144 124 153 159 166 170 190 1.62 J 1.17 J 1.93 1.6 1.93 1.77 2.52 1.61 J 1.64 1.88 3.39 2.21 2.28 4.25

< 1.63

< 1.45

< 1.41

< 1.15

< 1.07

< 0.865

< 0.782

< 1.86

< 1.32

< 0.914

< 0.759

< 0.899

< 0.867

< 0.815 1120 335 304 452 317 523 337 348 187 191 190 289 297 202 25.7 25.1 26.1 29.7 34.6 30.2 32.5 34.5 33.4 36.4 35.9 33.4 34.1 33 10.5 5.3 11.5 7.14 10.3 8.5 13.7 6.78 7.1 8.47 15.6 8.86 9.36 13.4 25.8 19 20.8 20 19.6 23.5 21.8 25.6 21.1 24.3 26.8 25.4 26.4 28.6 15300 9550 16100 17000 18500 15400 25200 18100 15800 19100 21900 17100 18700 21400 32.1 24.2 17 23.9 23.4 26.9 16.9 29.8 25.9 33.9 17 31.5 30 18.5 2440 1940 2810 2700 3020 2760 3810 2390 2700 2920 3650 2740 3040 3960 368 128 261 156 186 258 281 127 114 175 264 173 194 250 108 J

< 148

< 130 57.1 J 58.5 J 82.5 J 48.3 J 104 J 65.2 J 76.6 J 54.2 J 74.6 J 83.7 41 J 13.8 9.14 12 11.9 11.6 11.6 13.2 12.1 12.6 13.5 15.5 13.5 13.9 17.5 1060 1120 1560 1500 850 1350 1150 1310 1410 1370 834 1170 1280 1150

< 9.78 2 J

< 8.48

< 6.87

< 6.4 1.26 J 1.2 J

< 11.2 1.34 J

< 5.48 1.24 J 1.3 J

< 5.2

< 4.89

< 16.3

< 1.45

< 14.1

< 11.5

< 10.7

< 8.65

< 7.82

< 18.6

< 13.2

< 9.14

< 7.59

< 8.99

< 8.67

< 8.15 71.5 J 91.1 82.4 71.9 76.6 53.8 52.9 88 J 70.6 84.1 87 63.2 71.3 69.8

< 65.2

< 58

< 56.6

< 45.8

< 42.7

< 3.46

< 31.3

< 74.4

< 53

< 36.6

< 30.4

< 36

< 34.7

< 3.26 62.1 54.3 64.8 71.2 81 71 87.6 77.1 78.9 93.2 86.2 81.8 86.9 79.8 67.3 34.7 55.7 51.5 54.7 52.7 63.9 54.1 53.4 56.1 70.8 55.6 59.1 83.5

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 1600

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 1600

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 640 Page 10 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Location Depth Type Date SVOCs 4-Nitroaniline ug/kg SVOCs 4-Nitrophenol ug/kg SVOCs Acenaphthene ug/kg SVOCs Acenaphthylene ug/kg SVOCs Acetophenone ug/kg SVOCs Anthracene ug/kg SVOCs Atrazine ug/kg SVOCs Benz(a)anthracene ug/kg SVOCs Benzaldehyde ug/kg SVOCs Benzo(a)pyrene ug/kg SVOCs Benzo(b)fluoranthene ug/kg SVOCs Benzo(g,h,i)perylene ug/kg SVOCs Benzo(k)fluoranthene ug/kg SVOCs Bis(2-chloroethoxy)methane ug/kg SVOCs Bis(2-chloroethyl)ether ug/kg SVOCs Bis(2-chloroisopropyl)ether ug/kg SVOCs Bis(2-ethylhexyl)phthalate ug/kg SVOCs Butyl benzyl phthalate ug/kg SVOCs Caprolactam ug/kg SVOCs Carbazole ug/kg SVOCs Chrysene ug/kg SVOCs Dibenz(a,h)anthracene ug/kg SVOCs Dibenzofuran ug/kg SVOCs Diethyl phthalate ug/kg SVOCs Dimethyl phthalate ug/kg SVOCs Di-n-butyl phthalate ug/kg SVOCs Di-n-octyl phthalate ug/kg SVOCs Fluoranthene ug/kg SVOCs Fluorene ug/kg SVOCs Hexachlorobenzene ug/kg SVOCs Hexachlorobutadiene ug/kg SVOCs Hexachlorocyclopentadiene ug/kg SVOCs Hexachloroethane ug/kg SVOCs Indeno(1,2,3-cd)pyrene ug/kg SVOCs Isophorone ug/kg SVOCs Naphthalene ug/kg SVOCs Nitrobenzene ug/kg SVOCs N-Nitrosodi-n-propylamine ug/kg SVOCs N-Nitrosodiphenylamine ug/kg SVOCs Pentachlorophenol ug/kg SVOCs Phenanthrene ug/kg SVOCs Phenol ug/kg SVOCs Pyrene ug/kg VOCs (1-Methylethyl)-Benzene ug/kg VOCs 1,1,1-Trichloroethane ug/kg VOCs 1,1,2,2-Tetrachloroethane ug/kg VOCs 1,1,2-Trichlor-1,2,2-trifluoroethane ug/kg VOCs 1,1,2-Trichloroethane ug/kg VOCs 1,1-Dichloroethane ug/kg VOCs 1,1-Dichloroethene ug/kg VOCs 1,2,4-Trichlorobenzene ug/kg VOCs 1,2-Dibromo-3-chloropropane ug/kg VOCs 1,2-Dibromoethane ug/kg VOCs 1,2-Dichlorobenzene ug/kg VOCs 1,2-Dichloroethane ug/kg VOCs 1,2-Dichloropropane ug/kg VOCs 1,3-Dichlorobenzene ug/kg VOCs 1,4-Dichlorobenzene ug/kg SED-50 SED-51 SED-51 SED-52 SED-52 SED-53 SED-53 SED-54 SED-54 SED-55 SED-55 SED-56 SED-56 SED-56 0 - 6 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 0 - 6 in 6 - 12 in N

N N

N FD N

11/26/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019

< 640

< 620

< 630

< 640

< 620

< 640

< 630

< 620

< 630

< 640

< 1600

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 1600

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 1600

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 330

< 320

< 330

< 320

< 330

< 320

< 330

< 66

< 63

< 64

< 66

< 64

< 65

< 63

< 64

< 65

< 66

< 65

< 66

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5 Page 11 of 12

Table A3 - Sediment Analytical Results Westinghouse Columbia Fuel Fabrication Facility, Hopkins, SC Group Analyte RUSL IUSL Units Location Depth Type Date VOCs 2-Butanone ug/kg VOCs 2-Hexanone ug/kg VOCs 4-Methyl-2-pentanone ug/kg VOCs Acetone ug/kg VOCs Benzene ug/kg VOCs Bromodichloromethane ug/kg VOCs Bromoform ug/kg VOCs Bromomethane ug/kg VOCs Carbon disulfide ug/kg VOCs Carbon tetrachloride ug/kg VOCs Chlorobenzene ug/kg VOCs Chloroethane ug/kg VOCs Chloroform ug/kg VOCs Chloromethane ug/kg VOCs cis-1,2-Dichloroethene ug/kg VOCs cis-1,3-Dichloropropene ug/kg VOCs Cyclohexane ug/kg VOCs Dibromochloromethane ug/kg VOCs Dichlorodifluoromethane ug/kg VOCs Ethylbenzene ug/kg VOCs Methyl acetate ug/kg VOCs Methyl tert-butyl ether ug/kg VOCs Methylcyclohexane ug/kg VOCs Methylene chloride ug/kg VOCs Styrene ug/kg VOCs Tetrachloroethene ug/kg VOCs Toluene ug/kg VOCs trans-1,2-Dichloroethene ug/kg VOCs trans-1,3-Dichloropropene ug/kg VOCs Trichloroethene ug/kg VOCs Trichlorofluoromethane ug/kg VOCs Vinyl chloride ug/kg VOCs Xylenes, Total ug/kg SED-50 SED-51 SED-51 SED-52 SED-52 SED-53 SED-53 SED-54 SED-54 SED-55 SED-55 SED-56 SED-56 SED-56 0 - 6 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 6 - 12 in 0 - 6 in 0 - 6 in 6 - 12 in N

N N

N FD N

11/26/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 11/27/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 12/2/2019 190 43

< 27 31

< 26

< 22

< 21 42

< 25

< 19

< 20

< 21

< 19

< 14

< 13

< 12

< 13

< 11

< 10

< 13

< 9.7

< 9.8

< 10

< 9.7

< 7.1

< 13

< 12

< 13

< 11

< 10

< 13

< 9.7

< 9.8

< 10

< 9.7

< 7.1 370 330 180 100

< 26

< 22 170 330 39

< 19 200 220 23

< 14

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2 12

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3 8.7

< 6.7 10

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 6.3

< 6.6

< 6.7

< 6.2

< 6.4

< 5.4

< 5.2

< 6.6

< 6.3

< 4.9

< 5.2

< 4.8

< 3.5

< 13

< 12

< 13

< 11

< 10

< 13

< 9.7

< 9.8

< 10

< 9.7

< 7.1 Notes:

N - normal sample FD - field duplicate sample RUSL - Residential Use Screening Level (NUREG 1757, Appendix H)

IUSL - Industrial Use Screening Level (NUREG 1757, Appendix H)

Bold concentrations indicate detections Concentrations in shaded cells exceed their RUSL/IUSL NA - not analyzed

- value is below minimum detectable concentration

1. - value is reported as a negative number pCi/g - picocuires per gram ug/kg - micrograms per kilogram mg/kg - milligrams per kilogram SVOCs - semivolatile organic compounds VOCs - volatile organic compounds

- sludge sample collected from the Sanitary Lagoon

- - sludge sample collected from the East Lagoon J - Estimated result is less than the practical quantitation limit and greater than the method detection limit Page 12 of 12

ML21187A315

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