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Annual Radiological Environmental Operating Report for Calendar Year 2020
	ML21106A213
Person / Time
Site:	Saint Lucie
Issue date:	04/16/2021
From:	Godes W; Florida Power & Light Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	L-2021-083
	Download: ML21106A213 (87)
	v • d • e

April 16, 2021 L-2021-083 10 CFR 50.4 10 CFR 50.36 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Re: St. Lucie Units 1 and 2 Docket Nos. 50-335 and 50-389 Annual Radiological Environmental Operating Report for Calendar Year 2020 The enclosed report is being submitted pursuant to Technical Specification 6.9.1.8. The Annual Radiological Environmental Operating Report provides information summaries and analytical results of the Radiological Environmental Monitoring Program (REMP) for calendar year 2020.

Please contact me at 772-467-7435 with any questions regarding this submittal.

Sincerely, Wyatt Godes Licensing Manager St. Lucie Plant WG/rcs

Enclosure:

2020 Annual Radiological Environmental Operating Report (86 pages) cc: USNRC Senior Resident Inspector, St. Lucie Units 1 and 2 Florida Power & Light Company 6501 S. Ocean Drive, Jensen Beach, FL 34957

2020 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT UNITS 1 & 2 LICENSE NOS. DPR-67, NPF-16 DOCKET NOS. 50-335, 50-389 Data Submitted by:

Prepared by:

TABLE OF CONTENTS DESCRIPTION PAGE

1. Introduction 2

2. Radiological Environmental Monitoring Program 2

3. Discussion and Interpretation of Results 4

4. Environmental Radiological Monitoring Program Annual Summary 7

5. Deviations / Missing Data 16

6. Analyses with LLDs Above Required Detection Capabilities 17

7. Key to Sample Locations 17

8. Ground Water Protection, Industry Initiative 21

9. Radiological Surveillance of Florida Power and Light Companys St. Lucie Site 24

i. First Quarter 2020 ii. Second Quarter 2020 iii. Third Quarter 2020 iv. Fourth Quarter 2020

10. Results from the Interlaboratory Comparison Program 2020 84 1lPage

1. Introduction This report is submitted pursuant to Specification 6.9.1.8 of St. Lucie Unit 1 and St. Lucie Unit 2 Technical Specifications. The Annual Radiological Environmental Operating Report (AREOR) provides information, summaries, and analytical results pertaining to the radiological environmental monitoring program for the calendar year indicated. This report covers surveillance activities meeting the requirements of Unit 1 and Unit 2 Technical Specifications.

2. Radiological Environmental Monitoring Program A. Purpose The purpose of the Radiological Environmental Monitoring Program (REMP) is to provide representative measurements of radiation and of radioactive materials in those exposure pathways and for those radionuclides which lead to the highest potential radiation exposures to members of the public resulting from station operation. The REMP also supplements the radiological effluents monitoring program by verifying that the measurable concentrations of radioactive materials and levels of radiation are not higher than expected based on the effluent measurements and the modeling of the environmental exposure pathways.

B. Program Description The Radiological Environmental Monitoring Program for the St. Lucie Plant (PSL) is conducted pursuant to the St. Lucie Units 1 and 2 Offsite Dose Calculation Manual (ODCM) Section 3/4.12.1 Monitoring Program.

1. Sample Locations, Types, and Frequencies

a. Direct radiation gamma exposure rate is monitored continuously at 27 locations by thermoluminescent dosimeters (TLDs). TLDs are collected and analyzed quarterly.

b. Airborne radioiodine and particulate samplers are operated continuously at five locations. Samples are collected and analyzed weekly. Analyses include Iodine-131, gross beta, and gamma isotopic measurements.

c. Surface water samples are collected from two locations. Samples are collected and analyzed weekly and monthly, respectively. Analyses include gamma isotopic and tritium measurements.

d. Shoreline sediment samples are collected from two locations coinciding with the locations for surface water samples. Samples are collected and analyzed semi-annually. Sediment samples are analyzed by gamma isotopic measurements.

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e. Fish and invertebrate samples are collected from two locations. Samples are collected and analyzed semi-annually. Fish and invertebrate samples are analyzed by gamma isotopic measurements.

f. Broad leaf vegetation samples are collected from three locations. Samples are collected and analyzed monthly. Broad leaf vegetation samples are analyzed by gamma isotopic measurements.

2. Analytical Responsibility Radiological environmental monitoring for the St. Lucie Plant is conducted by the State of Florida, Department of Health (DOH), Bureau of Radiation Control (BRC). Samples are collected and analyzed by DOH personnel.

Samples are analyzed at the DOH BRC Environmental Radiation Control Laboratory in Orlando, Florida.

C. Analytical Results Environmental Radiological Monitoring Program Annual Summary provides a summary for all specified samples collected during the referenced surveillance period. Analysis data for all specified samples analyzed during the surveillance period is provided in Section 4. Deviations from the sample schedule or missing data, if any, are noted and explained in Section 5 - Deviations/Missing Data. Samples not meeting the specified "a priori" LLD, if any, are noted and explained in Section 6 - Analyses with LLDs Above Required Detection Capabilities.

D. Land Use Census A Land Use Census survey out to a five-mile radius from the St. Lucie Plant is conducted annually to determine the location of the nearest milk animal, residence, and garden producing broad leaf vegetation in each of the 16 meteorological sectors. A summary of the Land Use Census for the surveillance year is provided in Section 4.

E. Interlaboratory Comparison Program The interlaboratory comparison program consists of participating in the DOE Mixed Analyte Performance Evaluation Program (MAPEP) and the Environmental Resources Associates (ERA) RadChem Study proficiency testing.

The samples are analyzed using the methods applicable to the REMP (Gamma Spectroscopy, Gross Beta, and Tritium for Water).

The results for nuclides associated with the REMP are listed in Section 10.

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3. Discussion and Interpretation of Results A. Reporting of Results The Annual Radiological Environmental Operating Report contains the summaries, interpretations, and information required by St. Lucie Plant ODCM. The following tables provide a summary of the measurements made for the nuclides required by ODCM Table 4.12-1 for all samples specified by Table 3.12-1. In addition, summaries are provided for other nuclides identified in the specified samples, including those not related to station operation. These include nuclides such as K-40, Th-232, Ra-226, and Be-7, which are common and naturally occurring in the Florida environment.

B. Interpretation of Results

1. Direct Radiation The results of direct radiation monitoring are consistent with past measurements for the specified locations. The exposure rate data showed no indication of any adverse trends attributed to effluents from the plant. The measured exposure rates were consistent with exposure rates that were observed during the pre-operational surveillance program.

2. Air Particulates/Radioiodine The results for radioactive air particulate and radioiodine attributed to plant effluents were consistent with past measurements and indicated no trends attributable to plant effluents. No detectable I-131 was present in any of the radioiodine samples. Gamma isotopic measurements yielded no indication of any nuclides attributed to station operation. The results for air particulate/radioiodine samples were consistent with measurements that were made during the pre-operational surveillance program.

3. Waterborne, Surface Water The results for radioactivity measurements in surface water were consistent with past measurements and with measurements made during the pre-operational surveillance program. Tritium was reported as present in 1 of the 52 ODCM required samples for the indicator location and none of the 12 samples of the control location surface water samples collected. The single tritium value reported was 2.5% of the required lower limit of detection listed in ODCM Table 4.12-1 and 0.25% of the reporting level listed in ODCM Table 3.12-2. There was no indication of any other nuclides attributable to plant effluents.

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4. Waterborne, Sediment and Food Products The results for radioactivity measurements in waterborne sediment, fish, and crustacean samples were consistent with past measurements and with measurements made during the pre-operational surveillance program. For the Fish Ingestion Pathway, Cs-137 was not reported for the two indicator samples or the 2 control samples. There was no indication of any other nuclides attributable to plant effluents.

5. Broad Leaf Vegetation The results for radioactivity measurements in broad leaf vegetation were consistent with past measurements and with measurements made during the pre-operational surveillance program. Cs-137 was not present in any of the 24 ODCM required samples or in any of the 12 Control locations. There were no indications of any other nuclides that could be attributed to plant effluents.

6. Land Use Census One change was identified as compared to the 2019 Land Use Census results; an additional residence was included in the NNW sector. No locations were identified with potential milk-producing animals (cows or goats).

No locations yielding a calculated dose or dose commitment greater than the values currently being calculated were identified by the Land Use Census.

No locations yielding a calculated dose or dose commitment (via the same exposure pathway) 20 percent greater than locations currently being sampled in the radiological environmental monitoring program were identified by the Land Use Census.

7. Interlaboratory Comparison Program The State of Florida laboratory participated in MAPEP Series 42 and 43 and the ERA RadCheM Study 121 and 123. These satisfied the requirements as directed in the PSL Offsite Dose Calculation Manual (ODCM) for the Interlaboratory Comparison Program.

C. Conclusions The data obtained through the St. Lucie Plant REMP verifies that the levels of radiation and concentrations of radioactive materials in environmental samples, representing the highest potential exposure pathways to members of the public, are not increasing.

Measured exposure rates are consistent with the exposure rates observed during the pre-operational surveillance program.

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Results for air particulate/radioiodine samples are consistent with measurements that were made during the pre-operational surveillance program.

The single value for tritium in surface water was 2.5% of the required lower limit of detection listed in ODCM Table 4.12-1 and 0.25% of the reporting level listed in ODCM Table 3.12-1. There was no indication of any other nuclides attributable to plant effluents.

There was no indication of any nuclides in the waterborne sediment or food products that could be attributed to plant effluents.

No indications of any nuclides that could be attributed to plant effluents in the broad leaf vegetation samples were present.

REMP sample analysis results verify that the dose or dose commitment to members of the public, attributable to the operation of St. Lucie Units 1 and 2 during the surveillance year, are well within "as low as reasonably achievable (ALARA) criteria established by 10 CFR 50, Appendix I.

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4. Environmental Radiological Monitoring Program Annual Summary I. Direct Radiation PATHWAY: DIRECT RADIATION SAMPLES COLLECTED: TLD UNITS: micro-R/hr All Indicator Locations Location with Highest Annual Mean Control Location Number of Lower Limit of Mean (f)b Name Mean (f)b Mean (f)b Type of Analyses Detectiona Range Distance & Direction Range Range Analyses Performed (LLD)

Exposured 105 --- 3.27 (101/101) NW-10 4.23 (4/4) 3.49 (4/4) 2.41-4.39 9.6 mi., NW 3.83-4.39 2.98-3.89 Number of Non-Routine Reported Measurements = 0.

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II. Air Particulates/Radioiodine PATHWAY: AIRBORNE SAMPLES COLLECTED: RADIOIODINE AND PARTICULATES UNITS: pico-Ci/M3 All Indicator Locations Location with Highest Annual Mean Control Location Number of Mean (f) b Name Mean (f) b Mean (f)b Type of Analyses Lower Limit of Range Distance & Range Range Analyses Performed Detectiona (LLD) Direction 131 260 0.012 <MDA (208/208) <MDA <MDA I

Gross Beta 260 0.0064 0.0126 (202/208) H30 0.013 (52/52) 0.013 (51/52) 0.004-0.026 2 mi., W 0.006-0.026 0.006-0.024 Composite 80 Gamma 7

Be 16 0.0006 0.1303 (16/16) H14 0.1408 (4/4) 0.1350 (4/4) 0.0893-0.1620 1 mi., SE 0.1030-0.1620 0.1100-0.1580 134 Cs 16 0.0008 <MDA <MDA <MDA 137 Cs 16 0.0008 <MDA <MDA <MDA 210 Pb 16 ---------- 0.0123 (5/16) H34 0.0207 (1/4) 0.0072 (1/4) 0.0095-0.0207 0.5 mi., N Be-7 and Pb-210 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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III. Waterborne, Surface Water PATHWAY: WATERBORNE SAMPLES COLLECTED: SURFACE WATER UNITS: pico-Ci/LITER All Indicator Locations Location with Highest Annual Mean Control Locations Number of Lower Limit of Mean (f)b Name Mean (f)b Mean (f)b Analyses Detectiona Range Distance & Direction Range Range Type of Analyses Performed (LLD)

Tritium 64 172 75 (1/52) H15 75 (1/52) <MDA

<1mi., ENE/E/ESE Gamma Isotopic 64 40 K 58 354 (52/52) H15 354 (52/52) 355 (12/12) 266-431 <1mi., ENE/E/ESE 266-431 323-378 54 3 <MDA <MDA <MDA Mn 59 Fe 6 <MDA <MDA <MDA 58 Co 3 <MDA <MDA <MDA 60 4 <MDA <MDA <MDA Co 65 Zn 7 <MDA <MDA <MDA 95 Zr-Nb 6-3 <MDA <MDA <MDA 131 4 <MDA <MDA <MDA I

134 Cs 4 <MDA <MDA <MDA 137 4 <MDA Cs <MDA <MDA 140 9-3 <MDA <MDA Ba-La <MDA K-40 is naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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IV. Waterborne, Sediment and Food Products PATHWAY: WATERBORNE SAMPLES COLLECTED: SHORELINE SEDIMENT UNITS: pico-Ci/kg DRY All Indicator Locations Location with Highest Annual Mean Control Locations Number of Lower Limit of Mean (f)b Name Mean (f)b Mean (f)b Type of Analyses Detectiona Range Distance & Direction Range Range Analyses Performed (LLD)

Gamma 4

Isotopic 7 56 <MDA <MDA <MDA Be 40 K 100 192 (2/2) H15 192 (2/2) 210 (1/2) 110-274 <1mi, ENE/E/ESE 110-274 58 Co 6 <MDA <MDA <MDA 60 Co 7 <MDA <MDA <MDA 134 7 <MDA <MDA <MDA Cs 137 7 <MDA <MDA <MDA Cs 210 Pb 322 (1/2) H15 322 (1/2) <MDA

<1mi, ENE/E/ESE 226 Ra 15 227 (1/2) H15 227 (1/2) 143 (1/2)

<1mi, ENE/E/ESE 232 Th 25 83 (1/2) H15 83 (1/2) <MDA

<1mi, ENE/E/ESE 235 U 28 (1/2) H15 28 (1/2) 25 (1/2)

<1mi, ENE/E/ESE 238 173 (2/2)

U H15 173 (2/2) 102 (2/2) 105-240 <1mi, ENE/E/ESE 105-240 93-110 Be-7, K-40, Pb-210, Ra-226, Th-232, U-235, and U-238 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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PATHWAY: INGESTION SAMPLES COLLECTED: CRUSTACEA UNITS: pico-Ci/kg WET All Indicator Locations Location with Highest Annual Mean Control Locations Number of Lower Limit of Mean (f)b Name Mean (f)b Mean (f)b Type of Analyses Detectiona Range Distance & Direction Range Range Analyses Performed (LLD)

Gamma 4

Isotopic 40 K 270 2035 (2/2) H-15 2035 (2/2) 1445 (2/2) 1820-2250 <1mi, ENE/E/ESE 1820-2250 1200-1690 54 Mn 16 <MDA <MDA <MDA 58 Co 15 <MDA <MDA <MDA 60 Co 16 <MDA <MDA <MDA 134 Cs 16 <MDA <MDA <MDA 137 Cs 18 <MDA <MDA <MDA 226 Ra 300 <MDA <MDA <MDA 228 Ra 58 <MDA <MDA 554 (2/2) 285-822 59 Fe 28 <MDA <MDA <MDA 65 Zn 32 <MDA <MDA <MDA K-40, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

PATHWAY: INGESTION SAMPLES COLLECTED: FISH UNITS: pico-Ci/kg WET All Indicator Locations Location with Highest Annual Mean Control Locations Number of Lower Limit of Mean (f)b Name Mean (f)b Mean (f)b Type of Analyses Detectiona Range Distance & Direction Range Range Analyses Performed (LLD)

Gamma 4

Isotopic 40 270 2830 (2/2) 2830 (2/2) 2825 (2/2)

K H15 2600-3060 <1mi., ENE/E/ESE 2600-3060 2660-2990 54 16 <MDA <MDA <MDA Mn 58 15 <MDA <MDA <MDA Co 60 16 <MDA <MDA <MDA Co 134 16 <MDA <MDA <MDA Cs 137 Cs 18 <MDA <MDA <MDA 226 <MDA <MDA Ra 300 <MDA 228 58 <MDA <MDA <MDA Ra 59 Fe 28 <MDA <MDA <MDA 65 32 <MDA <MDA <MDA Zn K-40, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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V. Broad Leaf Vegetation PATHWAY: INGESTION SAMPLES COLLECTED: BROADLEAF VEGETATION UNITS: pico-Ci/kg WET All Indicator Locations Location with Highest Annual Mean Control Locations Number of Lower Limit of Mean (f)b Name Mean (f)b Mean (f)b Type of Analyses Detectiona Range Distance & Direction Range Range Analyses Performed (LLD)

Gamma 36 Isotopic 7

Be 64 1229 (24/24) H52 1278 (12/12) 1197 (12/12) 814-2310 1mi., S/SSE 814-1820 867-1530 40 K 120 3804 (24/24) H51 4012 (12/12) 2546 (12/12) 2490-4880 1mi., N/NNW 3140-4850 1780-3880 58 Co 6 <MDA <MDA <MDA 60 Co 8 <MDA <MDA <MDA 131 I 8 <MDA <MDA <MDA 134 Cs 8 <MDA <MDA <MDA 137 Cs 8 <MDA <MDA <MDA 210 Pb 563 (5/24) H52 785 (3/12) 250 (4/12) 165-1140 1mi., S/SSE 165-1140 116-616 212 Pb 25 (7/24) H51 26 (4/12) 22 (4/12) 15-41 1mi., N/NNW 15-41 13-35 226 Ra 189 <MDA <MDA <MDA 228 Ra 58 <MDA <MDA <MDA Be-7, K-40, Pb-210, Pb-212, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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NOTES

a. The LLD is an "a priori" lower limit of detection which establishes the smallest concentration of radioactive material in a sample that will yield a net count above system background that will be detected with 95% probability with only 5% probability of falsely concluding that a blank observation represents a real signal.

LLDs in this column are at time of measurement. The MDAs reported in the Quarterly Reports for the individual samples have been corrected to the time of sample collection.

b. Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f).

c. Specific identifying information for each sample location is provided in Section 7.

d. Results were based upon the average net response of three elements in a TLD (thermoluminescent dosimeter).

Note: MDA refers to minimum detectable activity.

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VI. Land Use Census The St. Lucie Annual Land Use Census Survey was performed during the months of August and September 2020. One change was identified as compared to the 2019 Land Use Census results; an additional residence was included in the NNW sector. No locations were identified with potential milk-producing animals (cows or goats).

2020 St. Lucie Land Use Census: Distance to Nearest Locationa, b Sector Residence Gardend Milk Animalc N Oe O O NNE O O O NE O O O ENE O O O E O O O ESE O O O A: 1.5/142° SE O O B: 1.6/145° A: 1.8/147°g SSE Lf L B: 2.0/149° S 3.3/190° L L SSW 2.2/212° 4.4/207° L SW 1.9/234° L L WSW 1.9/240° 2.0/250° L W 1.9/260° L L WNW 2.3/281° L L NW 3.4/304° L L A: 2.7/344° NNW L L B: 2.8/343° 14 l P a g e

NOTES

a. All categories surveyed out to a 5-mile radius from the St. Lucie Plant.

b. The following format is used to denote the location:

distance (miles) / bearing (degrees)

Ex: A residence located in the southeast sector at 1.5 miles bearing 142 degrees is recorded as 1.5/142°.

c. Potential milk animal locations.

d. Only gardens with an estimated total area of 500 square feet, or more, and producing green leafy vegetables are considered.

e. O denotes that the sector area is predominantly an ocean area.

f. L denotes that the sector area is predominantly a land area unoccupied by the category type.

g. Non-residential occupied buildings in this sector include the following:

Sector Distance Description SSE (A) 1.8/147° Fire Station 15 l P a g e

5. Deviations / Missing Data Several instances of missing data and air sampler partial run times are as follows:

A. Pathway: Direct Radiation Exposure Location: TLD SSE-5 (North of Entrance to Miramar; 5.1 miles)

Dates: 3/10/20 - 6/16/20 Deviation: Failure to Perform Continuous Monitoring

Description:

TLD was missing during Quarter 2 sampling by the State of Florida Bureau of Radiation Control (BRC) at the ODCM required REMP Program sampling location SSE-5.

Corrective Action: Replaced TLD.

B. Pathway: Direct Radiation Exposure Location: TLD WNW-10 (SR 70, Just West of I-95; 10 miles)

Dates: 6/16/20 - 9/22/20 Deviation: Failure to Perform Continuous Monitoring

Description:

TLD was missing during Quarter 3 sampling by the State of Florida Bureau of Radiation Control (BRC) at the ODCM required REMP Program sampling location WNW-10.

Corrective Action: Replaced TLD.

C. Pathway: Direct Radiation Exposure Location: TLD SSE-10 (Elliot Museum; 10.2 miles)

Dates: 6/16/20 - 9/22/20 Deviation: Failure to Perform Continuous Monitoring

Description:

TLD was missing during Quarter 3 sampling by the State of Florida Bureau of Radiation Control (BRC) at the ODCM required REMP Program sampling location SSE-10.

Corrective Action: Replaced TLD.

D. Pathway: Airborne: Radioiodine and Particulates Location: H08 (FPL Substation - Weatherbee Road; 6 miles)

Dates: 10/27/20-11/03/20 Deviation: Failure to perform continuous monitoring

Description:

Pump failure during the sampling week. Estimated run time for the week was 27 hours3.125e-4 days 0.0075 hours 4.464286e-5 weeks 1.02735e-5 months out of 169 (142 hours0.00164 days 0.0394 hours 2.347884e-4 weeks 5.4031e-5 months down time).

Corrective Action: Replaced the pump.

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6. Analyses with LLDs Above Required Detection Capabilities The values specified in the ODCM 4.12-1 Detection Capabilities were achieved for all samples. REMP sampling deviations and missing data are listed in Section 5.

7. Key to Sample Locations Site Area Map & Environmental Sample Locations 17 l P a g e

Environmental Sample Locations (10 Miles) 18 l P a g e

PATHWAY: Direct Radiation SAMPLES COLLECTED: TLD SAMPLE FREQUENCY: Quarterly Location Direction Approximate Name Sector Distance (Miles) Description N-1 N 1 North of Blind Creek (A1A)

NNW-5 NNW 4.8 Frederick Douglas Beach Entrance NNW-10 NNW 8.7 Coast Guard Station NW-5 NW 5.4 Indian River Drive at Rio Vista Drive NW-10 NW 9.6 Intersection of SR 68 and 33rd St (FPL Facility)

WNW-2 WNW 2.3 Cemetery South of 7107 Indian River Drive WNW-5 WNW 5.1 US-1 at SR 712 WNW-10 WNW 10 SR 70, Just West of I-95 W-2 W 2 Power Line - 77609 Indian River Drive W-5 W 5.4 Oleander and Sager Streets W-10 W 10.3 I-95 and SR 709 WSW-2 WSW 1.8 8503 Indian River Drive WSW-5 WSW 5.6 Prima Vista Blvd. at Yacht Club WSW-10 WSW 10 Del Rio and Davis Streets SW-2 SW 2 9205 Indian River Drive SW-5 SW 4.5 FPL Walton Service Center SW-10 SW 10.2 Port St. Lucie Blvd. and Cairo Road SSW-2 SSW 2.6 10307 Indian River Drive SSW-5 SSW 6 Port St. Lucie Blvd. and US-1 SSW-10 SSW 8 Pine Valley and Westmoreland Roads S-5 S 5.2 13189 Indian River Drive S-10 S 10.8 US 1 and Palm City Ave S/SSE-10 SSE 9.9 Indian River Drive and Quail Run Lane SSE-5 SSE 5.1 North of Entrance to Miramar SSE-10 SSE 10.2 Elliot Museum SE-1 SE 1 South of Cooling Canal H32 (Control) NNW 18.1 U. of Florida - IFAS Entomology Lab Vero Beach 19 l P a g e

PATHWAY: Airborne SAMPLES COLLECTED: Radioiodine and Particulates SAMPLE FREQUENCY: Weekly Location Direction Approximate Name Sector Distance (Miles) Description H08 WNW 6 FPL Substation - Weatherbee Road H14 SE 1 On-Site - Near South Property Line H30 W 2 Power Line - 7609 Indian River Drive H34 N 0.5 On-Site - At Meteorological Tower H12 (Control) S 12 FPL Substation, SR-76 Stuart PATHWAY: Waterborne SAMPLES COLLECTED: Surface Water (Ocean)

SAMPLE FREQUENCY: H-15 Weekly; H-59 Monthly Location Direction Approximate Name Sector Distance (Miles) Description H15 ENE/E/ESE <1 Atlantic Ocean Public Beaches, East Side A1A H59 (Control) S/SSE 10-20 Near South End of Hutchinson Island SAMPLES COLLECTED: Shoreline Sediment SAMPLE FREQUENCY: Semi-Annually Location Direction Approximate Name Sector Distance (Miles) Description H15 ENE/E/ESE <1 Atlantic Ocean Public Beaches, East Side A1A H59 (Control) S/SSE 10-20 Near South End of Hutchinson Island PATHWAY: Ingestion - Food Products SAMPLES COLLECTED: Crustacea and Fish SAMPLE FREQUENCY: Semi-Annually Location Direction Approximate Name Sector Distance (Miles) Description H15 ENE/E/ESE <1 Ocean Side, Vicinity of St. Lucie Plant H59 (Control) S/SSE 10-20 Near South End of Hutchinson Island SAMPLES COLLECTED: Broad Leaf Vegetation - Food Products SAMPLE FREQUENCY: Monthly Location Direction Approximate Name Sector Distance (Miles) Description H51 N/NNW 1 Off-Site Near North Property Line H52 S/SSE 1 Off-Site Near South Property Line H59 (Control) S/SSE 10-20 Near South End of Hutchinson Island 20 l P a g e

8. Ground Water Protection, Industry Initiative A. Description of Program Quarterly sampling and analysis for tritium and principle gamma emitters was performed by the State of Florida Department of Health (DOH) and Bureau of Radiation Control (BRC), pursuant to an Agreement between FPL and DOH, as part of the ODCM REMP sampling program.

The wells identified for radiological environmental sampling in support of the industry initiative are listed below and in Appendix B-2 of the ODCM. The 10 wells are on the outside perimeter of the Protected Area. The two St. Lucie Plant ID locations ending in S are shallower wells adjacent (within a few feet) of a deeper well at the same location.

Samples were analyzed for tritium and principle gamma emitters. Tritium was the only fission product identified. Naturally occurring potassium (K-40) was identified occasionally.

State ID St. Lucie Plant ID Location Description H70 GIS-MW-ES West of A1A; Between the Discharge Canal and Gate B H71 GIS-MW-EI West of A1A; Between the Discharge Canal and Gate B H72 GIS-MW-SI South of Intake Canal and the adjacent access road H73 GIS-MW-SWS S/W corner of Intake Canal and the adjacent access road H74 GIS-MW-SWI S/W corner of Intake Canal and the adjacent access road H75 GIS-MW-WI West of plant site and Intake Canal; South of switchyard H76 H76 North of Simulator; South of Big Mud Creek H77 H77 East of Barge Slip; By Land Utilization Building H78 H78 South of North Warehouse H79 H79 West of A1A and East of Parking Lot 21 l P a g e

B. St. Lucie 2020 Tritium Results Summary (pCi/L)

Well Number 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter H70 135 <137 <137 <139 H71 477 648 946 776 H72 <139 <137 <137 <139 H73 <138 <137 <137 <139 H74 <138 <145 <137 <139 H75 <138 <145 <137 <139 H76 <146 <145 <137 <139 H77 <136 <145 <137 <139 H78 <138 <145 <137 <139 H79 <146 <145 <137 <139 22 l P a g e

C. Map of Groundwater Water Protection - Industry Initiative Wells 23 l P a g e

9. Radiological Surveillance of Florida Power & Light Company St. Lucie Site RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FIRST QUARTER 2020 BUREAU OF RADIATION CONTROL 24 l P a g e

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling First Quarter, 2020 Number of Sample Type Collection Frequency Locations Sampled Samples

1. Direct Radiation Quarterly 27 27

2. Airborne 2.a. Air Iodines Weekly 5 65 2.b. Air Particulates Weekly 5 65

3. Waterborne 3.a. Surface Water Weekly 1 13 Monthly 1 3 3.b. Shoreline Sediment Semiannually 2 2

4. Ingestion 4.a. Fish and Invertebrates 4.a.1. Crustacea Semiannually 2 2 4.a.2. Fish Semiannually 2 2 4.b. Broadleaf Vegetation Monthly 3 9 Total: 188 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95%

confidence) for the true activity in the sample.

The marine fauna listed in this report were collected in part, under Florida FWC SAL030.

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1. DIRECT RADIATION - TLDs - (µR/hour)

Sample Deployment 17-Dec-19 Sample Deployment 17-Dec-19 Site Collection 10-Mar-20 Site Collection 10-Mar-20 N-1 3.20 +/- 0.09 SW-2 3.13 +/- 0.11 NNW-5 3.24 +/- 0.33 SW-5 3.95 +/- 0.21 NNW-10 3.97 +/- 0.10 SW-10 3.16 +/- 0.24 NW-5 3.08 +/- 0.27 SSW-2 3.29 +/- 0.23 NW-10 4.39 +/- 0.48 SSW-5 3.97 +/- 0.21 WNW-2 3.31 +/- 0.31 SSW-10 3.21 +/- 0.20 WNW-5 3.55 +/- 0.02 S-5 3.52 +/- 0.65 WNW-10 3.42 +/- 0.22 S-10 3.36 +/- 0.26 W-2 3.15 +/- 0.17 S/SSE-10 3.87 +/- 0.26 W-5 3.53 +/- 0.31 SSE-5 3.22 +/- 0.35 W-10 3.08 +/- 0.16 SSE-10 3.25 +/- 0.24 WSW-2 3.50 +/- 0.32 SE-1 3.14 +/- 0.26 WSW-5 3.32 +/- 0.26 H-32 3.62 +/- 0.12 WSW-10 3.00 +/- 0.18 26 l P a g e

2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 07-Jan-20 <0.02 <0.02 <0.02 <0.02 <0.02 16-Jan-20 <0.02 <0.02 <0.02 <0.02 <0.02 21-Jan-20 <0.03 <0.03 <0.03 <0.03 <0.03 28-Jan-20 <0.02 <0.02 <0.02 <0.03 <0.03 04-Feb-20 <0.02 <0.02 <0.02 <0.02 <0.02 12-Feb-20 <0.01 <0.01 <0.01 <0.01 <0.01 18-Feb-20 <0.02 <0.02 <0.02 <0.02 <0.02 25-Feb-20 <0.02 <0.02 <0.02 <0.02 <0.02 03-Mar-20 <0.02 <0.02 <0.02 <0.02 <0.02 10-Mar-20 <0.02 <0.02 <0.02 <0.02 <0.02 17-Mar-20 <0.02 <0.02 <0.02 <0.02 <0.02 24-Mar-20 <0.03 <0.03 <0.03 <0.03 <0.03 31-Mar-20 <0.02 <0.02 <0.02 <0.02 <0.02 27 l P a g e

2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 07-Jan-20 0.020 +/- 0.002 0.016 +/- 0.002 0.015 +/- 0.002 0.017 +/- 0.002 0.014 +/- 0.002 16-Jan-20 0.013 +/- 0.002 0.010 +/- 0.002 0.012 +/- 0.002 0.011 +/- 0.002 0.016 +/- 0.002 21-Jan-20 0.021 +/- 0.003 0.017 +/- 0.003 0.019 +/- 0.003 0.017 +/- 0.003 0.006 +/- 0.002 28-Jan-20 0.018 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.011 +/- 0.002 04-Feb-20 0.012 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.011 +/- 0.002 12-Feb-20 0.011 +/- 0.002 0.014 +/- 0.002 0.013 +/- 0.002 0.016 +/- 0.002 0.012 +/- 0.002 18-Feb-20 0.010 +/- 0.002 0.010 +/- 0.002 0.006 +/- 0.002 0.008 +/- 0.002 0.009 +/- 0.002 25-Feb-20 0.009 +/- 0.002 0.009 +/- 0.002 <0.008 0.007 +/- 0.002 0.005 +/- 0.002 03-Mar-20 0.011 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 0.014 +/- 0.002 0.009 +/- 0.002 10-Mar-20 0.012 +/- 0.002 0.011 +/- 0.002 0.011 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 17-Mar-20 0.005 +/- 0.002 0.014 +/- 0.002 0.011 +/- 0.002 0.013 +/- 0.002 0.006 +/- 0.002 24-Mar-20 0.011 +/- 0.002 0.011 +/- 0.002 0.008 +/- 0.002 0.010 +/- 0.002 0.010 +/- 0.002 31-Mar-20 0.012 +/- 0.002 0.019 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 0.010 +/- 0.002 Average: 0.013 +/- 0.002 0.013 +/- 0.002 <0.011 0.013 +/- 0.002 0.010 +/- 0.002 2.b.2. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES -

(pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H08 0.1360 +/- 0.0092 <0.0141 <0.0012 <0.0009 <0.0151 H12 0.1360 +/- 0.0090 <0.0146 <0.0012 <0.0010 <0.0135 H14 0.1360 +/- 0.0095 <0.0219 <0.0012 <0.0010 <0.0322 H30 0.1250 +/- 0.0088 <0.0120 <0.0012 <0.0010 <0.0153 H34 0.1110 +/- 0.0086 <0.0251 <0.0011 <0.0009 0.0207 +/- 0.0083 28 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H15 07-Jan-20 <140 355 +/- 26 <4 <3 <6 <4 <8 <5 <3 <3 <3 <12 16-Jan-20 <140 361 +/- 26 <4 <3 <7 <3 <8 <5 <3 <3 <3 <10 21-Jan-20 <146 400 +/- 27 <4 <3 <6 <4 <8 <5 <4 <3 <4 <11 28-Jan-20 <138 393 +/- 27 <3 <3 <7 <3 <8 <5 <4 <3 <4 <6 04-Feb-20 <146 402 +/- 27 <3 <3 <7 <3 <8 <5 <3 <3 <4 <13 13-Feb-20 <135 342 +/- 25 <3 <3 <7 <4 <6 <6 <4 <3 <3 <9 18-Feb-20 <139 386 +/- 27 <3 <3 <7 <3 <7 <6 <4 <3 <3 <12 25-Feb-20 <139 383 +/- 27 <3 <3 <7 <3 <8 <5 <3 <4 <4 <10 03-Mar-20 <139 375 +/- 26 <3 <3 <7 <4 <8 <5 <4 <3 <4 <12 10-Mar-20 <141 431 +/- 28 <3 <3 <7 <4 <7 <5 <3 <3 <4 <11 17-Mar-20 <141 369 +/- 27 <3 <3 <7 <4 <7 <5 <4 <3 <3 <12 24-Mar-20 <145 374 +/- 27 <3 <3 <7 <3 <8 <6 <3 <3 <3 <11 31-Mar-20 <145 391 +/- 27 <3 <3 <7 <4 <7 <6 <4 <3 <4 <11 H59 23-Jan-20 <139 376 +/- 27 <3 <3 <7 <3 <7 <6 <4 <3 <3 <10 13-Feb-20 <135 378 +/- 27 <4 <3 <7 <4 <8 <6 <6 <3 <4 <5 13-Mar-20 <141 331 +/- 25 <3 <3 <7 <4 <8 <5 <4 <3 <4 <5 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

Analysis of these two samples did not meet the required 15 pCi/L limit of detection for Ba-140/La-140 due to an oversight of lab processes. Additional processes and training have been put in place to fix this oversight.

29 l P a g e

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 13-Feb-20 <63 274 +/- 27 <6 <5 <7 <7 322 +/- 61 227 +/- 8 83 +/- 7 28 +/- 3 240 +/- 17 H59 13-Feb-20 <86 210 +/- 38 <10 <8 <9 <10 <791 143 +/- 9 <46 25 +/- 5 110 +/- 44 4.a.1. CRUSTACEA - (pCi/kg, wet weight)

Sample Collection Site Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 16-Jan-20 1820 +/- 199 <24 <22 <44 <25 <58 <17 <23 <50 <104 H59 19-Feb-20 1200 +/- 93 <18 <15 <32 <16 <39 <19 <21 285 +/- 15 <85 4.a.2. FISH - Mixed Species - (pCi/kg, wet weight)

Sample Collection Site Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 20-Feb-20 3060 +/- 210 <22 <24 <56 <24 <57 <18 <20 <51 <119 H59 21-Feb-20 2660 +/- 177 <20 <20 <39 <20 <42 <22 <20 <45 <95 30 l P a g e

4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 23-Jan-20 1200 +/- 68 3660 +/- 180 <13 <14 <14 <1120 <33 <28 <54 13-Feb-20 1100 +/- 63 4850 +/- 211 <13 <11 <15 <928 15 +/- 7 <29 <65 13-Mar-20 1260 +/- 73 4000 +/- 198 <20 <13 <18 <997 <25 <31 <61 H52 23-Jan-20 1320 +/- 66 3270 +/- 161 <10 <11 <12 <907 <22 <28 <54 13-Feb-20 1140 +/- 60 3230 +/- 160 <11 <10 <13 1140 +/- 344 <22 <26 <56 13-Mar-20 1370 +/- 69 3640 +/- 173 <16 <11 <13 <1090 <21 <25 <57 H59 23-Jan-20 1140 +/- 63 2020 +/- 126 <12 <11 <13 <777 24 +/- 7 <20 <48 13-Feb-20 1020 +/- 60 2370 +/- 137 <10 <11 <13 <846 <21 <26 <49 13-Mar-20 982 +/- 54 2450 +/- 130 <13 <9 <12 616 +/- 238 <19 <16 <41 31 l P a g e

ST. LUCIE SITE Supplemental Sampling First Quarter, 2020 Number of Sample Type Collection Frequency Locations Sampled Samples

1. Direct Radiation Quarterly 9 9

2. Airborne 2.a. Air Iodines Weekly 3 39 2.b. Air Particulates Weekly 3 39

3. Waterborne 3.a. Surface Water Monthly 2 6 3.b. Shoreline Sediment Semiannually 4 4 3.c. Beach Sand Semiannually 3 3 3.d. Ground Water Quarterly 10 10

4. Ingestion 4.a. Garden Crops Annually 1 0 4.b. Citrus Annually 1 1 Total: 111 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95%

confidence) for the true activity in the sample.

32 l P a g e

1. DIRECT RADIATION - TLDs - (µR/hour)

Sample Deployment 17-Dec-19 Site Collection 10-Mar-20 H08 3.66 +/- 0.25 H09 3.80 +/- 0.28 H12 7.79 +/- 0.56 H14 3.70 +/- 0.21 H33 3.58 +/- 0.43 H34 3.50 +/- 0.38 H60 3.64 +/- 0.44 H61 4.52 +/- 0.39 H62 3.97 +/- 0.06 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 07-Jan-20 <0.02 <0.02 <0.03 16-Jan-20 <0.02 <0.02 <0.03 21-Jan-20 <0.03 <0.03 <0.03 28-Jan-20 <0.02 <0.02 <0.03 04-Feb-20 <0.02 <0.02 <0.02 12-Feb-20 <0.01 <0.01 <0.01 18-Feb-20 <0.02 <0.02 <0.02 25-Feb-20 <0.02 <0.02 <0.02 03-Mar-20 <0.02 <0.02 <0.02 10-Mar-20 <0.02 <0.02 <0.02 17-Mar-20 <0.02 <0.02 <0.02 24-Mar-20 <0.03 <0.03 <0.03 31-Mar-20 <0.02 <0.02 <0.02 33 l P a g e

2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 07-Jan-20 0.016 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.003 16-Jan-20 0.012 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 21-Jan-20 0.022 +/- 0.003 0.013 +/- 0.003 0.018 +/- 0.003 28-Jan-20 0.017 +/- 0.002 0.018 +/- 0.002 0.010 +/- 0.002 04-Feb-20 0.017 +/- 0.002 0.015 +/- 0.002 0.014 +/- 0.002 12-Feb-20 0.013 +/- 0.002 0.016 +/- 0.002 0.011 +/- 0.002 18-Feb-20 0.006 +/- 0.002 0.008 +/- 0.002 0.008 +/- 0.002 25-Feb-20 <0.007 0.008 +/- 0.002 0.005 +/- 0.002 03-Mar-20 0.008 +/- 0.002 0.008 +/- 0.002 0.011 +/- 0.002 10-Mar-20 0.011 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 17-Mar-20 0.007 +/- 0.002 0.008 +/- 0.002 0.013 +/- 0.002 24-Mar-20 0.008 +/- 0.002 0.010 +/- 0.002 0.013 +/- 0.002 31-Mar-20 0.011 +/- 0.002 0.017 +/- 0.002 0.011 +/- 0.002 Average: <0.012 0.012 +/- 0.002 0.011 +/- 0.002 2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1190 +/- 0.0087 <0.0180 <0.0012 <0.0010 <0.0296 H32 0.1520 +/- 0.0098 <0.0212 <0.0012 <0.0009 0.0272 +/- 0.0091 H33 0.1300 +/- 0.0091 <0.0143 <0.0014 <0.0010 <0.0159 34 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H13 23-Jan-20 <138 328 +/- 25 <3 <3 <7 <3 <7 <6 <4 <3 <3 <12 13-Feb-20 <135 336 +/- 25 <3 <3 <7 <4 <8 <5 <4 <3 <3 <10 13-Mar-20 <141 309 +/- 24 <3 <3 <8 <4 <8 <6 <5 <3 <3 <5 H36 23-Jan-20 2723 +/- 84 309 +/- 25 <3 <3 <7 <4 <7 <6 <3 <3 <3 <10 13-Feb-20 6514 +/- 119 360 +/- 26 <3 <3 <7 <4 <8 <7 <5 <3 <3 <5 13-Mar-20 <141 366 +/- 26 <3 <3 <8 <3 <7 <6 <5 <3 <4 <5 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

35 l P a g e

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 13-Feb-20 <85 660 +/- 54 <9 <9 <9 <10 <742 265 +/- 10 109 +/- 12 42 +/- 5 163 +/- 53 H16 13-Feb-20 <86 190 +/- 37 <9 <8 <8 <10 <831 240 +/- 10 68 +/- 10 41 +/- 5 189 +/- 34 H19 13-Feb-20 <65 173 +/- 22 <6 <6 <7 <6 186 +/- 56 174 +/- 7 59 +/- 6 18 +/- 3 132 +/- 18 H36 13-Feb-20 575 +/- 103 4770 +/- 224 <44 <27 <29 33 +/- 10 4800 +/- 1230 593 +/- 26 311 +/- 47 74 +/- 12 1420 +/- 91 3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 13-Feb-20 <87 198 +/- 34 <8 <8 <8 <8 <670 221 +/- 10 89 +/- 12 <13 171 +/- 47 H16 13-Feb-20 41 +/- 14 158 +/- 21 <6 <5 <7 <7 157 +/- 54 262 +/- 8 84 +/- 7 35 +/- 3 269 +/- 18 H19 13-Feb-20 <100 192 +/- 33 <11 <8 <9 <9 <744 296 +/- 11 88 +/- 12 48 +/- 5 283 +/- 36 36 l P a g e

3.d. GROUND WATER (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H70 24-Jan-20 135 +/- 45 <103 <4 <6 <11 <6 <13 <10 <8 <6 <7 <11 H71 24-Jan-20 477 +/- 52 312 +/- 25 <3 <3 <8 <4 <8 <6 <6 <3 <4 <5 H72 24-Jan-20 <139 317 +/- 24 <3 <3 <7 <4 <10 <6 <6 <4 <4 <6 H73 24-Jan-20 <138 <64 <3 <3 <7 <4 <8 <7 <6 <3 <3 <5 H74 24-Jan-20 <138 283 +/- 23 <3 <3 <7 <4 <7 <6 <6 <4 <4 <6 H75 24-Jan-20 <138 402 +/- 42 <5 <6 <14 <7 <15 <10 <9 <5 <6 <8 H76 24-Jan-20 <146 <97 <7 <6 <9 <6 <13 <11 <9 <5 <6 <10 H77 24-Jan-20 <136 <92 <6 <6 <13 <5 <12 <10 <10 <5 <7 <9 H78 24-Jan-20 <138 <110 <5 <7 <14 <7 <14 <10 <10 <5 <6 <13 H79 24-Jan-20 <146 <78 <6 <7 <11 <5 <14 <9 <9 <5 <6 <10 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

Analysis of these three samples did not meet the required 15 pCi/L limit of detection for Ba-140/La-140 due to an oversight of lab processes. Additional processes and training have been put in place to fix this oversight.

37 l P a g e

4.a. GARDEN CROPS - (pCi/kg, wet weight)

Sample Collection Date Site Be-7 K-40 I-131 Cs-134 Cs-137 H41 This sample not yet collected.

4.b. CITRUS - Oranges - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 H23 21-Jan-20 <29 1870 +/- 70 <4 <3 <4 38 l P a g e

RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT SECOND QUARTER 2020 BUREAU OF RADIATION CONTROL 39 l P a g e

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Second Quarter, 2020 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 27 26

2. Airborne 2.a. Iodines Weekly 5 65 2.b. Air Particulates Weekly 5 65

3. Waterborne 3.a. Surface Water Weekly 1 13 Monthly 1 3 3.b. Shoreline Sediment Semiannually 2 0

4. Ingestion 4.a. Fish and Invertebrates Semiannually 2 0 4.a.1. Crustacea 4.a.2. Fish Semiannually 2 0 4.b. Broadleaf Vegetation Monthly 3 9 Total: 181 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95% confidence) for the true activity in the sample.

The marine fauna listed in this report were collected in part, under Florida FWC SAL030.

40 l P a g e

1. DIRECT RADIATION - DUAL DEPLOYED TLDs - (µR/hour)

Sample Deployment 10-Mar-20 Sample Deployment 10-Mar-20 Site Collection 16-Jun-20 Site Collection 16-Jun-20 N-1 3.19 +/- 0.31 SW-2 3.17 +/- 0.12 NNW-5 3.23 +/- 0.39 SW-5 3.78 +/- 0.11 NNW-10 3.67 +/- 0.12 SW-10 3.19 +/- 0.34 NW-5 3.22 +/- 0.48 SSW-2 3.09 +/- 0.33 NW-10 4.32 +/- 0.06 SSW-5 3.50 +/- 0.19 WNW-2 3.19 +/- 0.16 SSW-10 2.81 +/- 0.33 WNW-5 3.36 +/- 0.29 S-5 3.15 +/- 0.06 WNW-10 3.26 +/- 0.24 S-10 3.24 +/- 0.05 W-2 2.93 +/- 0.33 S/SSE-10 3.70 +/- 0.30 W-5 3.42 +/- 0.19 SSE-5 (A)

W-10 2.82 +/- 0.55 SSE-10 3.17 +/- 0.30 WSW-2 3.29 +/- 0.12 SE-1 2.92 +/- 0.04 WSW-5 3.31 +/- 0.08 H-32 3.45 +/- 0.22 WSW-10 2.95 +/- 0.14 (A) TLD could not be located at time of collection.

41 l P a g e

2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection H08 H12 H14 H30 H34 Date 07-Apr-20 <0.04 <0.04 <0.04 <0.04 <0.04 14-Apr-20 <0.02 <0.02 <0.02 <0.02 <0.02 21-Apr-20 <0.04 <0.04 <0.04 <0.04 <0.04 28-Apr-20 <0.02 <0.02 <0.02 <0.02 <0.02 05-May-20 <0.03 <0.03 <0.03 <0.03 <0.03 12-May-20 <0.03 <0.03 <0.03 <0.03 <0.03 19-May-20 <0.02 <0.02 <0.02 <0.02 <0.02 26-May-20 <0.02 <0.02 <0.02 <0.02 <0.02 02-Jun-20 <0.03 <0.03 <0.03 <0.03 <0.03 09-Jun-20 <0.03 <0.03 <0.03 <0.03 <0.03 16-Jun-20 <0.02 <0.02 <0.02 <0.02 <0.02 24-Jun-20 <0.01 <0.01 <0.01 <0.01 <0.01 30-Jun-20 <0.02 <0.02 <0.02 <0.02 <0.02 42 l P a g e

2.b.1.AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 07-Apr-20 0.016 +/- 0.002 0.015 +/- 0.002 0.010 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 14-Apr-20 0.019 +/- 0.002 0.023 +/- 0.002 0.025 +/- 0.002 0.018 +/- 0.002 0.020 +/- 0.002 21-Apr-20 0.016 +/- 0.002 0.017 +/- 0.002 0.014 +/- 0.002 0.015 +/- 0.002 0.015 +/- 0.002 28-Apr-20 0.018 +/- 0.002 0.020 +/- 0.002 0.015 +/- 0.002 0.017 +/- 0.002 0.009 +/- 0.002 05-May-20 0.017 +/- 0.002 0.016 +/- 0.002 0.017 +/- 0.002 0.020 +/- 0.002 0.020 +/- 0.002 12-May-20 0.015 +/- 0.002 0.015 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 19-May-20 0.011 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 0.016 +/- 0.002 26-May-20 0.013 +/- 0.002 0.006 +/- 0.002 0.019 +/- 0.002 0.012 +/- 0.002 0.018 +/- 0.002 02-Jun-20 0.011 +/- 0.002 0.008 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.012 +/- 0.002 09-Jun-20 0.011 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 16-Jun-20 0.009 +/- 0.002 0.009 +/- 0.002 0.012 +/- 0.002 0.011 +/- 0.002 0.008 +/- 0.002 24-Jun-20 0.006 +/- 0.001 0.009 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 0.006 +/- 0.002 30-Jun-20 0.011 +/- 0.002 0.012 +/- 0.002 0.014 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 Average: 0.013 +/- 0.001 0.013 +/- 0.001 0.015 +/- 0.001 0.014 +/- 0.001 0.013 +/- 0.001 43 l P a g e

2.b.2.AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H08 0.1330 +/- 0.0092 <0.0152 <0.0012 <0.0008 <0.0151 H12 0.1360 +/- 0.0082 <0.0191 <0.0008 <0.0009 0.0072 +/- 0.0022 H14 0.1620 +/- 0.0098 <0.0119 <0.0012 <0.0010 0.0096 +/- 0.0027 H30 0.1440 +/- 0.0099 <0.0206 <0.0010 <0.0009 <0.0311 H34 0.1090 +/- 0.0085 <0.0207 <0.0010 <0.0010 <0.0367 44 l P a g e

3.a.SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H15 07-Apr-20 75 +/- 25 414 +/- 27 <3 <3 <6 <3 <7 <5 <3 <3 <4 <10 14-Apr-20 <137 377 +/- 27 <3 <3 <7 <4 <7 <6 <3 <3 <3 <6 21-Apr-20 <145 341 +/- 26 <3 <3 <8 <3 <7 <6 <4 <3 <3 <7 28-Apr-20 <145 343 +/- 26 <3 <4 <7 <4 <7 <5 <4 <3 <4 <7 05-May-20 <136 348 +/- 26 <3 <3 <6 <3 <7 <5 <4 <3 <4 <10 12-May-20 <136 400 +/- 27 <3 <4 <7 <4 <8 <6 <3 <3 <3 <11 19-May-20 <144 352 +/- 26 <4 <4 <7 <4 <8 <6 <4 <3 <4 <4 26-May-20 <151 339 +/- 27 <4 <3 <5 <4 <8 <6 <3 <4 <4 <4 02-Jun-20 <151 268 +/- 23 <3 <4 <7 <3 <9 <6 <4 <4 <3 <4 09-Jun-20 <150 405 +/- 27 <3 <3 <6 <3 <7 <6 <3 <3 <3 <9 16-Jun-20 <150 345 +/- 26 <3 <3 <6 <4 <8 <5 <4 <3 <4 <4 24-Jun-20 <137 386 +/- 28 <3 <4 <7 <3 <8 <6 <4 <3 <4 <4 30-Jun-20 <150 367 +/- 27 <3 <3 <6 <3 <6 <6 <4 <4 <3 <4 H59 14-Apr-20 <137 374 +/- 27 <3 <3 <7 <4 <7 <6 <4 <3 <4 <5 12-May-20 <151 359 +/- 26 <3 <3 <6 <3 <7 <6 <3 <3 <3 <10 25-Jun-20 <150 354 +/- 27 <3 <3 <6 <4 <7 <6 <4 <3 <3 <4 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

45 l P a g e

3.b.SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 Site Date These samples previously collected.

4.a.1. CRUSTACEA - (pCi/kg, wet weight)

Sample Collection K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 Site Date H15 This sample previously collected.

H59 This sample previously collected.

4.a.2. FISH - (pCi/kg, wet weight)

Sample Collection K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 Site Date H15 This sample previously collected.

H59 This sample previously collected.

46 l P a g e

4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 Site Date H51 14-Apr-20 902 +/- 61 3590 +/- 178 <14 <11 <14 <988 <24 <278 <64 12-May-20 1010 +/- 60 4820 +/- 208 <11 <11 <14 <1180 18 +/- 7 <294 <59 25-Jun-20 815 +/- 42 4410 +/- 173 <8 <8 <9 179 +/- 72 41 +/- 4 <197 <38 H52 14-Apr-20 822 +/- 57 4880 +/- 212 <13 <11 <9 <972 <24 <332 <53 12-May-20 1150 +/- 63 3890 +/- 179 <12 <10 <13 1050 +/- 390 24 +/- 7 <242 <48 25-Jun-20 1150 +/- 67 3850 +/- 194 <13 <12 <13 <842 30 +/- 8 <260 <60 H59 14-Apr-20 1140 +/- 68 2940 +/- 159 <15 <12 <14 <1020 <23 <355 <58 12-May-20 1460 +/- 83 3880 +/- 203 <16 <14 <18 <1440 35 +/- 10 <397 <71 25-Jun-20 1330 +/- 67 3750 +/- 185 <11 <10 <14 <885 17 +/- 8 <266 <55 47 l P a g e

ST. LUCIE SITE Supplemental Sampling Second Quarter, 2020 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 9 9

2. Airborne 2.a Air Iodines Weekly 3 39 2.b. Air Particulates Weekly 3 39

3. Waterborne 3.a. Surface Water Monthly 2 6 3.b. Shoreline Sediment Semiannually 4 0 3.c. Beach Sand Semiannually 3 0 3.d. Ground Water Quarterly 10 10

4. Ingestion 4.a. Garden Crop Annually 1 0 4.b. Citrus Annually 1 0 Total: 103 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95% confidence) for the true activity in the sample.

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1. DIRECT RADIATION - DUAL DEPLOYED TLDs - (µR/hour)

Sample Deployment 10-Mar-20 Site Collection 16-Jun-20 H08 3.61 +/- 0.17 H09 3.70 +/- 0.46 H12 7.52 +/- 0.13 H14 3.60 +/- 0.38 H33 3.54 +/- 0.12 H34 3.35 +/- 0.15 H60 3.43 +/- 0.14 H61 4.34 +/- 0.08 H62 3.76 +/- 0.46 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 07-Apr-20 <0.04 <0.04 <0.04 14-Apr-20 <0.02 <0.02 <0.02 21-Apr-20 <0.04 <0.04 <0.04 28-Apr-20 <0.02 <0.02 <0.02 05-May-20 <0.03 <0.03 <0.03 12-May-20 <0.03 <0.03 <0.03 19-May-20 <0.02 <0.02 <0.02 26-May-20 <0.02 <0.02 <0.02 02-Jun-20 <0.03 <0.03 <0.03 09-Jun-20 <0.03 <0.03 <0.15(A) 16-Jun-20 <0.02 <0.02 <0.02 24-Jun-20 <0.01 <0.01 <0.01 30-Jun-20 <0.02 <0.02 <0.02 (A) No power. Estimated run time 33 out of 167 hours0.00193 days 0.0464 hours 2.761243e-4 weeks 6.35435e-5 months .

49 l P a g e

2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 07-Apr-20 0.014 +/- 0.002 0.015 +/- 0.002 0.017 +/- 0.002 14-Apr-20 0.018 +/- 0.002 0.023 +/- 0.002 0.014 +/- 0.002 21-Apr-20 0.019 +/- 0.002 0.016 +/- 0.002 0.014 +/- 0.002 28-Apr-20 0.014 +/- 0.002 0.018 +/- 0.002 0.013 +/- 0.002 05-May-20 0.016 +/- 0.002 0.020 +/- 0.002 0.015 +/- 0.002 12-May-20 0.021 +/- 0.002 0.014 +/- 0.002 0.014 +/- 0.002 19-May-20 0.013 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 26-May-20 0.013 +/- 0.002 0.014 +/- 0.002 0.013 +/- 0.002 02-Jun-20 0.011 +/- 0.002 0.015 +/- 0.002 0.008 +/- 0.002 09-Jun-20 0.008 +/- 0.002 0.009 +/- 0.002 <0.034(A) 16-Jun-20 0.011 +/- 0.002 0.011 +/- 0.002 0.009 +/- 0.002 24-Jun-20 0.011 +/- 0.002 0.008 +/- 0.002 0.008 +/- 0.001 30-Jun-20 0.009 +/- 0.002 0.013 +/- 0.002 0.012 +/- 0.002 Average: 0.014 +/- 0.001 0.015 +/- 0.001 <0.014 (A) No power. Estimated run time 33 out of 167 hours0.00193 days 0.0464 hours 2.761243e-4 weeks 6.35435e-5 months .

2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1240 +/- 0.0093 <0.0221 <0.0011 <0.0009 <0.0325 H32 0.1240 +/- 0.0082 <0.0196 <0.0007 <0.0007 0.0145 +/- 0.0029 H33 0.1420 +/- 0.0095 <0.0115 <0.0012 <0.0010 <0.0155 50 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H13 14-Apr-20 <137 316 +/- 25 <3 <3 <7 <4 <5 <7 <4 <3 <3 <7 12-May-20 <151 291 +/- 24 <3 <4 <6 <4 <7 <5 <4 <3 <3 <12 25-Jun-20 <137 246 +/- 21 <3 <4 <6 <4 <8 <6 <4 <3 <4 <4 H36 14-Apr-20 <137 401 +/- 28 <3 <4 <7 <4 <7 <5 <4 <3 <3 <5 12-May-20 <145 434 +/- 29 <3 <3 <7 <4 <7 <6 <4 <3 <4 <11 25-Jun-20 <137 313 +/- 25 <3 <3 <6 <3 <7 <6 <4 <3 <3 <4 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 Others These samples previously collected.

3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 Others These samples previously collected.

51 l P a g e

3.d.GROUND WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H70 21-Apr-20 <137 <52 <4 <4 <7 <4 <9 <6 <4 <4 <4 <14 H71 21-Apr-20 648 +/- 54 339 +/- 25 <3 <3 <7 <4 <8 <6 <4 <4 <4 <12 H72 21-Apr-20 <137 334 +/- 26 <4 <4 <7 <4 <9 <6 <5 <4 <4 <15 H73 21-Apr-20 <137 99 +/- 15 <3 <3 <7 <4 <8 <5 <4 <4 <4 <12 H74 21-Apr-20 <145 294 +/- 24 <3 <4 <6 <3 <7 <5 <4 <3 <3 <11 H75 21-Apr-20 <145 283 +/- 23 <3 <4 <7 <3 <8 <6 <4 <4 <4 <7 H76 21-Apr-20 <145 <90 <6 <6 <13 <7 <14 <9 <7 <5 <6 <10 H77 21-Apr-20 <145 <42 <4 <4 <7 <3 <9 <6 <4 <4 <3 <8 H78 21-Apr-20 <145 <52 <4 <3 <7 <4 <10 <6 <4 <4 <4 <10 H79 21-Apr-20 <145 <50 <3 <4 <6 <3 <7 <5 <4 <4 <3 <8 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

52 l P a g e

4.a GARDEN CROP - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 H41 This sample not yet collected.

4.b CITRUS - (pCi/kg, wet weight)

Sample Collection Be-7 K-40 I-131 Cs-134 Cs-137 Site Date H23 This sample previously collected.

53 l P a g e

RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT THIRD QUARTER 2020 BUREAU OF RADIATION CONTROL 54 l P a g e

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Third Quarter, 2020 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 27 25

2. Airborne 2.a. Air Iodines Weekly 5 65 2.b. Air Particulates Weekly 5 65

3. Waterborne 3.a. Surface Water Weekly 1 13 Monthly 1 3 3.b. Shoreline Sediment Semiannually 2 2

4. Ingestion 4.a. Fish and Invertebrates Semiannually 2 0 4.a.1. Crustacea 4.a.2. Fish Semiannually 2 0 4.b. Broadleaf Vegetation Monthly 3 9 Total: 182 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard- deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95% confidence) for the true activity in the sample.

The marine fauna listed in this report were collected in part, under Florida FWC SAL030.

55 l P a g e

1. DIRECT RADIATION - DEPLOYED TLDs - (µR/hour)

Sample Deployment 16-Jun-20 Sample Deployment 16-Jun-20 Site Collection 22-Sep-20 Site Collection 22-Sep-20 N-1 3.15 +/- 0.17 SW-2 3.28 +/- 0.05 NNW-5 3.07 +/- 0.58 SW-5 4.04 +/- 0.30 NNW-10 3.99 +/- 0.47 SW-10 3.24 +/- 0.41 NW-5 2.98 +/- 0.66 SSW-2 3.37 +/- 0.05 NW-10 4.36 +/- 0.41 SSW-5 3.80 +/- 0.15 WNW-2 3.37 +/- 0.40 SSW-10 2.83 +/- 0.61 WNW-5 3.44 +/- 1.15 S-5 3.28 +/- 0.55 WNW-10 (A) S-10 3.38 +/- 0.25 W-2 3.28 +/- 0.15 S/SSE-10 3.86 +/- 0.25 W-5 3.64 +/- 0.49 SSE-5 3.38 +/- 0.46 W-10 2.98 +/- 0.36 SSE-10 (A)

WSW-2 3.29 +/- 0.58 SE-1 3.26 +/- 0.38 WSW-5 3.36 +/- 0.13 H-32 3.89 +/- 0.27 WSW-10 3.16 +/- 0.42 (A) TLD could not be located at time of collection.

56 l P a g e

2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection H08 H12 H14 H30 H34 Date 06-Jul-20 <0.03 <0.03 <0.03 <0.03 <0.03 14-Jul-20 <0.01 <0.01 <0.01 <0.01 <0.01 21-Jul-20 <0.02 <0.02 <0.02 <0.02 <0.02 28-Jul-20 <0.02 <0.02 <0.02 <0.02 <0.02 04-Aug-20 <0.02 <0.02 <0.02 <0.02 <0.02 11-Aug-20 <0.02 <0.02 <0.02 <0.02 <0.02 18-Aug-20 <0.02 <0.02 <0.02 <0.02 <0.02 25-Aug-20 <0.02 <0.02 <0.02 <0.02 <0.02 01-Sep-20 <0.02 <0.02 <0.02 <0.02 <0.02 09-Sep-20 <0.02 <0.02 <0.02 <0.02 <0.02 15-Sep-20 <0.02 <0.02 <0.02 <0.02 <0.02 22-Sep-20 <0.02 <0.02 <0.02 <0.02 <0.02 30-Sep-20 <0.02 <0.02 <0.02 <0.02 <0.02 57 l P a g e

2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 06-Jul-20 0.013 +/- 0.002 0.011 +/- 0.002 0.018 +/- 0.002 0.013 +/- 0.002 0.008 +/- 0.002 14-Jul-20 0.017 +/- 0.002 0.014 +/- 0.002 0.017 +/- 0.002 0.020 +/- 0.002 0.015 +/- 0.002 21-Jul-20 0.014 +/- 0.002 0.017 +/- 0.002 0.016 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 28-Jul-20 0.010 +/- 0.002 0.009 +/- 0.002 0.009 +/- 0.002 0.006 +/- 0.002 0.008 +/- 0.002 04-Aug-20 0.011 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 0.012 +/- 0.002 0.008 +/- 0.002 11-Aug-20 0.013 +/- 0.002 0.011 +/- 0.002 0.007 +/- 0.002 0.009 +/- 0.002 0.006 +/- 0.002 18-Aug-20 0.011 +/- 0.002 0.011 +/- 0.002 0.011 +/- 0.002 0.010 +/- 0.002 0.007 +/- 0.002 25-Aug-20 0.007 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.007 +/- 0.002 01-Sep-20 0.008 +/- 0.002 0.006 +/- 0.002 0.008 +/- 0.002 0.010 +/- 0.002 <0.007 09-Sep-20 0.013 +/- 0.002 0.018 +/- 0.002 0.016 +/- 0.002 0.024 +/- 0.002 0.012 +/- 0.002 15-Sep-20 <0.009 0.006 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 0.004 +/- 0.002 22-Sep-20 0.008 +/- 0.002 0.010 +/- 0.002 0.006 +/- 0.002 0.009 +/- 0.002 0.006 +/- 0.002 30-Sep-20 0.008 +/- 0.002 0.008 +/- 0.002 0.011 +/- 0.002 0.009 +/- 0.002 0.008 +/- 0.002 Average: <0.011 0.012 +/- 0.001 0.012 +/- 0.001 0.012 +/- 0.001 <0.008 2.b.2. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 58 l P a g e

H08 0.0893 +/- 0.0069 <0.0197 <0.0008 <0.0007 0.0116 +/- 0.0024 H12 0.1100 +/- 0.0085 <0.0133 <0.0013 <0.0008 <0.0145 H14 0.1030 +/- 0.0072 <0.0198 <0.0008 <0.0008 0.0095 +/- 0.0029 H30 0.1340 +/- 0.0097 <0.0250 <0.0013 <0.0011 <0.0094 H34 0.0899 +/- 0.0088 <0.0241 <0.0013 <0.0010 <0.0087 59 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H15 06-Jul-20 <142 365 +/- 27 <3 <4 <7 <3 <8 <5 <4 <4 <4 <4 14-Jul-20 <139 377 +/- 27 <3 <3 <7 <3 <7 <6 <4 <4 <4 <4 21-Jul-20 <137 328 +/- 25 <4 <3 <7 <4 <7 <6 <5 <3 <4 <5 28-Jul-20 <137 319 +/- 26 <3 <4 <7 <4 <7 <6 <4 <3 <3 <4 04-Aug-20 <139 354 +/- 27 <3 <3 <8 <3 <7 <6 <4 <4 <4 <4 11-Aug-20 <139 356 +/- 26 <3 <3 <8 <4 <7 <7 <4 <3 <4 <4 18-Aug-20 <141 338 +/- 27 <4 <4 <8 <4 <8 <6 <4 <3 <4 <4 25-Aug-20 <141 346 +/- 26 <4 <3 <6 <3 <7 <5 <4 <3 <4 <4 01-Sep-20 <139 332 +/- 25 <4 <3 <7 <3 <7 <6 <4 <3 <4 <4 09-Sep-20 <139 334 +/- 25 <3 <3 <7 <4 <8 <6 <4 <3 <4 <4 15-Sep-20 <139 273 +/- 25 <3 <3 <7 <3 <8 <6 <3 <3 <4 <4 22-Sep-20 <140 377 +/- 27 <4 <4 <6 <3 <7 <6 <4 <3 <4 <4 30-Sep-20 <140 300 +/- 25 <3 <3 <7 <3 <6 <5 <3 <3 <4 <4 H59 14-Jul-20 <139 323 +/- 25 <3 <4 <6 <4 <8 <7 <4 <3 <3 <4 11-Aug-20 <139 345 +/- 26 <3 <3 <7 <3 <7 <6 <4 <3 <4 <4 15-Sep-20 <139 351 +/- 26 <3 <4 <6 <4 <8 <6 <4 <3 <4 <4 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

60 l P a g e

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 Site Date H15 24-Aug-20 <76 110 +/- 46 <8 <7 <8 <8 <379 <200 <69 <13 105 +/- 22 H59 24-Aug-20 <88 <125 <7 <6 <7 <7 <306 <172 <63 <11 4.a.1. CRUSTACEA - (pCi/kg, wet weight)

Sample Collection K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 Site Date H15 This sample not yet collected.

H59 This sample not yet collected.

4.a.2. FISH - (pCi/kg, wet weight)

Sample Collection K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 Site Date H15 This sample not yet collected.

H59 This sample not yet collected.

61 l P a g e

4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 Site Date H51 14-Jul-20 898 +/- 43 4460 +/- 171 <10 <7 <9 <62 <16 <189 <36 11-Aug-20 912 +/- 50 4530 +/- 189 <10 <11 <11 <641 29 +/- 7 <223 <52 15-Sep-20 1060 +/- 47 3530 +/- 148 <8 <8 <9 <208 <16 <188 <36 H52 14-Jul-20 1140 +/- 54 4380 +/- 181 <12 <9 <11 <277 <19 <220 <42 11-Aug-20 814 +/- 41 3680 +/- 156 <8 <9 <8 165 +/- 58 17 +/- 5 <201 <41 15-Sep-20 1270 +/- 62 3840 +/- 167 <12 <11 <10 <621 <20 <228 <45 H59 14-Jul-20 1360 +/- 71 2490 +/- 138 <13 <10 <14 <852 <22 <249 <54 11-Aug-20 1200 +/- 58 2900 +/- 145 <10 <11 <11 <261 <23 <237 <43 15-Sep-20 867 +/- 47 2190 +/- 116 <10 <9 <11 116 +/- 56 <16 <195 <35 62 l P a g e

SL QR 3Q-2020 ST. LUCIE SITE Supplemental Sampling Third Quarter, 2020 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 9 9

2. Airborne 2.a. Air Iodines Weekly 3 39 2.b. Air Particulates Weekly 3 39 3.Waterborne 3.a. Surface Water Monthly 2 6 3.b. Shoreline Sediment Semiannually 4 4 3.c. Beach Sand Semiannually 3 3 3.d. Ground Water Quarterly 10 10

4. Ingestion 4.a. Garden Crop Annually 1 0 4.b. Citrus Annually 1 0 Total: 110 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95% confidence) for the true activity in the sample.

63 l P a g e

1. DIRECT RADIATION - DEPLOYED TLDs - (µR/hour)

Sample Deployment 16-Jun-20 Site Collection 22-Sep-20 H08 3.96 +/- 0.43 H09 4.15 +/- 0.43 H12 7.51 +/- 1.00 H14 4.03 +/- 0.23 H33 3.90 +/- 0.42 H34 3.48 +/- 0.27 H60 3.47 +/- 0.51 H61 4.38 +/- 0.78 H62 3.73 +/- 0.55 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 06-Jul-20 <0.03 <0.03 <0.03 14-Jul-20 <0.01 <0.01 <0.01 21-Jul-20 <0.02 <0.02 <0.02 28-Jul-20 <0.02 <0.02 <0.02 04-Aug-20 <0.02 <0.02 <0.02 11-Aug-20 <0.02 <0.02 <0.02 18-Aug-20 <0.02 <0.02 <0.02 25-Aug-20 <0.02 <0.02 <0.02 01-Sep-20 <0.02 <0.02 <0.02 09-Sep-20 <0.02 <0.02 <0.02(A) 15-Sep-20 <0.02 <0.02 <0.03(B) 22-Sep-20 <0.02 <0.02 <0.01 30-Sep-20 <0.02 <0.02 <0.02 (A) No power. Estimated run time 173 out of 191 hours0.00221 days 0.0531 hours 3.158069e-4 weeks 7.26755e-5 months .

(B) Power restored 11-Sept-20 at 11:00.

64 l P a g e

2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 06-Jul-20 0.010 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 14-Jul-20 0.019 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.002 21-Jul-20 0.013 +/- 0.002 0.008 +/- 0.002 0.010 +/- 0.002 28-Jul-20 0.009 +/- 0.002 0.008 +/- 0.002 0.005 +/- 0.002 04-Aug-20 0.009 +/- 0.002 0.014 +/- 0.002 0.012 +/- 0.002 11-Aug-20 0.010 +/- 0.002 0.008 +/- 0.002 0.006 +/- 0.002 18-Aug-20 0.008 +/- 0.002 0.009 +/- 0.002 0.006 +/- 0.002 25-Aug-20 0.015 +/- 0.002 0.013 +/- 0.002 0.008 +/- 0.002 01-Sep-20 0.005 +/- 0.002 0.011 +/- 0.002 0.005 +/- 0.002 09-Sep-20 0.014 +/- 0.002 0.016 +/- 0.002 0.021 +/- 0.002(A) 15-Sep-20 <0.008 0.005 +/- 0.002 0.011 +/- 0.003(B) 22-Sep-20 0.009 +/- 0.002 0.008 +/- 0.002 0.007 +/- 0.001 30-Sep-20 0.007 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 Average: <0.011 0.011 +/- 0.001 0.010 +/- 0.001 (A) No power. Estimated run time 173 out of 191 hours0.00221 days 0.0531 hours 3.158069e-4 weeks 7.26755e-5 months .

(B) Power restored 11-Sept-20 at 11:00.

2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1070 +/- 0.0096 <0.0255 <0.0014 <0.0010 <0.0095 H32 0.1130 +/- 0.0083 <0.0136 <0.0010 <0.0009 <0.0149 H33 0.0857 +/- 0.0066 <0.0183 <0.0009 <0.0007 0.0102 +/- 0.0026 65 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H13 14-Jul-20 <139 268 +/- 23 <3 <3 <7 <3 <7 <6 <4 <3 <3 <4 11-Aug-20 <139 304 +/- 25 <3 <3 <7 <4 <7 <6 <3 <3 <3 <4 15-Sep-20 <139 277 +/- 24 <4 <3 <6 <4 <9 <5 <4 <3 <4 <4 H36 14-Jul-20 <139 305 +/- 24 <3 <3 <6 <3 <9 <6 <4 <3 <3 <4 11-Aug-20 <139 344 +/- 26 <3 <4 <7 <4 <7 <5 <3 <3 <4 <4 15-Sep-20 <139 367 +/- 27 <4 <3 <8 <4 <8 <6 <4 <3 <4 <4 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 24-Aug-20 225 +/- 27 524 +/- 49 <8 <7 <7 <7 <274 <278 23 +/- 10 <18 <184 H16 24-Aug-20 <77 132 +/- 29 <7 <6 <7 <7 <343 <229 <48 <14 <113 H19 24-Aug-20 <77 101 +/- 27 <7 <6 <8 <7 <345 187 +/- 72 <47 12 +/- 5 60 +/- 23 H36 24-Aug-20 <139 3570 +/- 143 <19 1030 +/- 19 <15 25 +/- 5 3730 +/- 288 625 +/- 93 67 +/- 21 39 +/- 6 41927 66 l P a g e

3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 24-Aug-20 56 +/- 24 242 +/- 42 <8 <8 <8 <8 <339 199 +/- 94 150 +/- 20 13 +/- 6 195 +/- 49 H16 24-Aug-20 254 +/- 28 270 +/- 40 <7 <8 <7 <7 <278 <286 80 +/- 15 <18 <192 H19 24-Aug-20 65 +/- 30 <135 <8 <8 <7 <7 <351 <206 <65 <13 214 +/- 47 67 l P a g e

3.d. GROUND WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H70 27-Jul-20 <137 <79 <4 <4 <8 <4 <10 <7 <5 <4 <5 <8 H71 27-Jul-20 946 +/- 60 340 +/- 34 <4 <4 <8 <4 <9 <6 <5 <4 <4 <8 H72 27-Jul-20 <137 315 +/- 34 <4 <4 <9 <4 <10 <8 <5 <3 <4 <7 H73 27-Jul-20 <137 82 +/- 13 <3 <3 <8 <4 <7 <7 <5 <4 <4 <5 H74 27-Jul-20 <137 258 +/- 23 <3 <4 <7 <4 <9 <6 <5 <4 <4 <5 H75 27-Jul-20 <137 304 +/- 24 <3 <3 <7 <3 <9 <6 <4 <4 <4 <4 H76 27-Jul-20 <137 <80 <4 <4 <8 <4 <9 <6 <5 <4 <4 <10 H77 27-Jul-20 <137 <75 <4 <4 <8 <4 <9 <7 <6 <4 <4 <7 H78 27-Jul-20 <137 <56 <3 <4 <8 <4 <8 <6 <6 <4 <4 <5 H79 27-Jul-20 <137 <41 <3 <3 <6 <3 <7 <6 <5 <3 <4 <5 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

68 l P a g e

4.a. GARDEN CROP - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 H41 This sample has not been available.

4.b. CITRUS - (pCi/kg, wet weight)

Sample Collection Be-7 K-40 I-131 Cs-134 Cs-137 Site Date H23 This sample previously collected.

69 l P a g e

RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FOURTH QUARTER 2020 BUREAU OF RADIATION CONTROL 70 l P a g e

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Fourth Quarter, 2020 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 27 27

2. Airborne 2.a. Air Iodines Weekly 5 65 2.b. Air Particulates Weekly 5 65

3. Waterborne 3.a. Surface Water Weekly 1 13 Monthly 1 3 3.b. Shoreline Sediment Semiannually 2 0

4. Ingestion 4.a. Fish and Invertebrates 4.a.1. Crustacea Semiannually 2 2 4.a.2. Fish Semiannually 2 2 4.b. Broadleaf Vegetation Monthly 3 9 Total: 186 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95%

confidence) for the true activity in the sample.

The marine fauna listed in this report were collected in part, under Florida FWC SAL030.

71 l P a g e

1. DIRECT RADIATION - DEPLOYED TLDs - (µR/hour)

Sample Deployment 22-Sep-20 Sample Deployment 22-Sep-20 Site Collection 15-Dec-20 Site Collection 15-Dec-20 N-1 2.86 +/- 0.37 SW-2 2.76 +/- 0.64 NNW-5 3.13 +/- 0.37 SW-5 3.47 +/- 0.16 NNW-10 3.57 +/- 0.78 SW-10 2.87 +/- 0.23 NW-5 2.70 +/- 0.34 SSW-2 2.91 +/- 0.25 NW-10 3.83 +/- 0.07 SSW-5 3.21 +/- 0.39 WNW-2 2.73 +/- 0.21 SSW-10 2.66 +/- 0.36 WNW-5 3.21 +/- 0.17 S-5 3.00 +/- 0.23 WNW-10 2.79 +/- 0.18 S-10 2.65 +/- 0.31 W-2 2.71 +/- 0.30 S/SSE-10 3.32 +/- 0.74 W-5 3.28 +/- 0.48 SSE-5 2.88 +/- 0.21 W-10 2.58 +/- 0.46 SSE-10 2.90 +/- 0.66 WSW-2 3.01 +/- 0.12 SE-1 2.85 +/- 0.33 WSW-5 3.03 +/- 0.81 H-32 2.98 +/- 0.47 WSW-10 2.41 +/- 0.05 72 l P a g e

2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 07-Oct-20 <0.02 <0.02 <0.02 <0.02 <0.02 13-Oct-20 <0.02 <0.02 <0.02 <0.02 <0.02 20-Oct-20 <0.02 <0.02 <0.02 <0.02 <0.02 27-Oct-20 <0.02 <0.02 <0.02 <0.02 <0.02 03-Nov-20 <0.11 (A) <0.02 <0.02 <0.02 <0.02 10-Nov-20 <0.04 <0.03 <0.03 <0.03 <0.03 17-Nov-20 <0.03 <0.03 <0.03 <0.03 <0.02 25-Nov-20 <0.02 <0.02 <0.02 <0.02 <0.02 01-Dec-20 <0.02 <0.02 <0.02 <0.02 <0.02 08-Dec-20 <0.02 <0.02 <0.02 <0.02 <0.02 15-Dec-20 <0.02 <0.02 <0.02 <0.02 <0.02 22-Dec-20 <0.02 <0.17 (B) <0.02 <0.02 <0.02 29-Dec-20 <0.03 <0.04 <0.04 <0.04 <0.04 (A) Due to a loss of power, run time was estimated at 27 hours3.125e-4 days 0.0075 hours 4.464286e-5 weeks 1.02735e-5 months out of 169.

(B) Due to a loss of power, run time was estimated at 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months out of 168.

73 l P a g e

2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 07-Oct-20 0.010 +/- 0.002 0.008 +/- 0.002 0.013 +/- 0.002 0.012 +/- 0.002 0.015 +/- 0.002 13-Oct-20 0.011 +/- 0.002 0.011 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.006 +/- 0.002 20-Oct-20 0.017 +/- 0.002 0.015 +/- 0.002 0.018 +/- 0.002 0.020 +/- 0.002 0.012 +/- 0.002 27-Oct-20 0.006 +/- 0.002 0.006 +/- 0.002 0.008 +/- 0.002 0.008 +/- 0.002 0.008 +/- 0.002 03-Nov-20 0.046 +/- 0.011 (A) 0.017 +/- 0.002 0.019 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 10-Nov-20 <0.011 0.007 +/- 0.002 <0.008 0.006 +/- 0.002 0.009 +/- 0.002 17-Nov-20 0.010 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 0.006 +/- 0.002 25-Nov-20 0.010 +/- 0.002 0.009 +/- 0.002 0.008 +/- 0.002 0.007 +/- 0.001 0.007 +/- 0.001 01-Dec-20 0.016 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 08-Dec-20 0.020 +/- 0.002 0.024 +/- 0.002 0.021 +/- 0.002 0.026 +/- 0.002 0.021 +/- 0.002 15-Dec-20 0.020 +/- 0.002 0.023 +/- 0.002 0.022 +/- 0.002 0.024 +/- 0.002 0.020 +/- 0.002 22-Dec-20 0.019 +/- 0.002 0.161 +/- 0.018 (B) 0.017 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 29-Dec-20 0.016 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 Average: <0.016 0.025 +/- 0.001 <0.015 0.015 +/- 0.001 0.013 +/- 0.001 (A) Due to a loss of power, run time was estimated at 27 hours3.125e-4 days 0.0075 hours 4.464286e-5 weeks 1.02735e-5 months out of 169.

(B) Due to a loss of power, run time was estimated at 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months out of 168.

2.b.2. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H08 0.1530 +/- 0.0105 <0.0140 <0.0012 <0.0011 <0.0170 H12 0.1580 +/- 0.0108 <0.0138 <0.0014 <0.0011 <0.0165 H14 0.1620 +/- 0.0093 <0.0160 <0.0010 <0.0008 0.0101 +/- 0.0027 H30 0.1480 +/- 0.0096 <0.0145 <0.0014 <0.0010 <0.0159 H34 0.1490 +/- 0.0101 <0.0156 <0.0013 <0.0009 <0.0146 74 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H15 07-Oct-20 <137 274 +/- 24 <3 <3 <7 <3 <8 <6 <4 <3 <3 <4 13-Oct-20 <134 307 +/- 25 <3 <3 <7 <3 <8 <6 <4 <4 <3 <4 20-Oct-20 <137 391 +/- 28 <4 <4 <8 <4 <7 <5 <3 <3 <4 <4 27-Oct-20 <137 332 +/- 26 <3 <4 <7 <3 <7 <5 <4 <3 <4 <4 03-Nov-20 <137 313 +/- 25 <3 <4 <7 <4 <8 <6 <4 <3 <3 <4 10-Nov-20 <137 303 +/- 24 <3 <3 <8 <3 <7 <6 <4 <3 <4 <4 17-Nov-20 <137 266 +/- 24 <3 <3 <6 <3 <7 <6 <4 <3 <4 <4 25-Nov-20 <139 363 +/- 29 <4 <4 <9 <5 <9 <7 <7 <4 <4 <5 01-Dec-20 <138 284 +/- 24 <3 <3 <7 <3 <8 <6 <4 <4 <3 <4 08-Dec-20 <139 405 +/- 28 <3 <4 <8 <4 <8 <5 <4 <3 <3 <4 15-Dec-20 <139 394 +/- 28 <4 <3 <7 <3 <8 <6 <4 <4 <4 <4 22-Dec-20 <137 370 +/- 27 <3 <3 <8 <4 <8 <5 <4 <4 <3 <4 29-Dec-20 <137 373 +/- 27 <3 <4 <6 <3 <9 <6 <4 <4 <4 <4 H59 20-Oct-20 <137 338 +/- 26 <4 <4 <7 <4 <7 <5 <4 <3 <4 <4 10-Nov-20 <137 365 +/- 34 <4 <4 <8 <4 <9 <7 <5 <4 <4 <7 22-Dec-20 <137 365 +/- 27 <3 <3 <7 <4 <8 <6 <4 <4 <3 <4 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

75 l P a g e

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 Site Date These samples previously collected.

4.a.1. CRUSTACEA - (pCi/kg, wet weight)

Sample Collection Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 Site H15 15-Dec-20 2250 +/- 127 <17 <18 <33 <17 <39 <19 <20 <371 <70 H59 08-Dec-20 1690 +/- 186 <23 <23 <39 <24 <57 <27 17 +/- 8 822 +/- 188 <118 4.a.2. FISH - Mixed Species - (pCi/kg, wet weight)

Sample Collection Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 Site H15 03-Nov-20 2600 +/- 191 <24 <22 <47 <23 <53 <25 <28 <395 <101 H59 04-Nov-20 2990 +/- 218 <22 <20 <35 <25 <53 <22 <25 <427 <93 76 l P a g e

4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 Site Date H51 20-Oct-20 2310 +/- 81 3140 +/- 148 <10 <10 <10 279 +/- 94 <21 <246 <40 10-Nov-20 1180 +/- 51 3720 +/- 156 <9 <8 <9 <545 <16 <189 <39 22-Dec-20 1520 +/- 59 3430 +/- 148 <9 <9 <10 <574 <18 <199 <35 H52 20-Oct-20 1720 +/- 64 2490 +/- 120 <10 <9 <10 <576 <20 <203 <40 10-Nov-20 1620 +/- 63 2830 +/- 125 <10 <8 <10 <593 <16 <188 <36 22-Dec-20 1820 +/- 70 3180 +/- 146 <10 <11 <10 <668 <20 <235 <46 H59 20-Oct-20 1530 +/- 58 1810 +/- 99 <8 <8 <10 <202 13 +/- 6 <193 <32 10-Nov-20 911 +/- 47 1970 +/- 106 <9 <8 <8 120 +/- 59 <18 <188 <35 22-Dec-20 1420 +/- 64 1780 +/- 103 <10 <10 <10 147 +/- 65 <23 <239 <36 77 l P a g e

ST. LUCIE SITE Supplemental Sampling Fourth Quarter, 2020 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 9 9

2. Airborne 2.a. Air Iodines Weekly 3 38 2.b. Air Particulates Weekly 3 38

3. Waterborne 3.a. Surface Water Monthly 2 6 3.b. Shoreline Sediment Semiannually 4 0 3.c. Beach Sand Semiannually 3 0 3.d. Ground Water Quarterly 10 10

4. Ingestion 4.a. Garden Crop Annually 1 0 4.b. Citrus Annually 1 0 Total: 101 NOTE: Measurement results having magnitudes that are significantly above the background of the measurement system are reported as net values plus or minus a one-standard-deviation error term. Measurement results that are not significantly above background are reported as less than a Lower Limit of Detection (<LLD), which is an estimated upper limit (with at least 95%

confidence) for the true activity in the sample.

78 l P a g e

1. DIRECT RADIATION - DEPLOYED TLDs - (µR/hour)

Sample Deployment 22-Sep-20 Site Collection 15-Dec-20 H08 3.39 +/- 0.21 H09 3.40 +/- 0.06 H12 6.71 +/- 0.88 H14 3.21 +/- 0.58 H33 2.98 +/- 0.46 H34 2.91 +/- 0.37 H60 2.89 +/- 0.27 H61 3.82 +/- 0.41 H62 3.49 +/- 0.23 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 07-Oct-20 <0.02 <0.02 <0.02 13-Oct-20 <0.02 <0.02 <0.02 20-Oct-20 <0.02 <0.02 <0.02 27-Oct-20 <0.02 <0.02 <0.03 03-Nov-20 <0.02 <0.02 <0.01 10-Nov-20 <0.03 <0.03 <0.02 17-Nov-20 <0.03 <0.03 <0.02 25-Nov-20 <0.02 <0.02 <0.02 01-Dec-20 <0.02 <0.02 <0.02 08-Dec-20 <0.02 <0.02 <0.02 15-Dec-20 <0.02 <0.02 (A) 22-Dec-20 <0.02 <0.02 <0.02 29-Dec-20 <0.04 <0.04 <0.03 (A) Not collected due to loss of power during the sample run time.

79 l P a g e

2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 07-Oct-20 0.010 +/- 0.002 0.011 +/- 0.002 0.012 +/- 0.002 13-Oct-20 0.012 +/- 0.002 0.015 +/- 0.002 0.008 +/- 0.002 20-Oct-20 0.014 +/- 0.002 0.019 +/- 0.002 0.012 +/- 0.002 27-Oct-20 0.007 +/- 0.002 0.005 +/- 0.002 0.005 +/- 0.002 03-Nov-20 0.019 +/- 0.002 0.017 +/- 0.002 0.017 +/- 0.002 10-Nov-20 <0.007 <0.007 0.009 +/- 0.002 17-Nov-20 0.007 +/- 0.002 0.010 +/- 0.002 0.008 +/- 0.002 25-Nov-20 0.007 +/- 0.001 0.009 +/- 0.002 0.009 +/- 0.002 01-Dec-20 0.012 +/- 0.002 0.013 +/- 0.002 0.009 +/- 0.002 08-Dec-20 0.021 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 15-Dec-20 0.020 +/- 0.002 0.025 +/- 0.002 (A) 22-Dec-20 0.016 +/- 0.002 0.011 +/- 0.002 0.019 +/- 0.002 29-Dec-20 0.018 +/- 0.002 0.016 +/- 0.002 0.020 +/- 0.002 Average: <0.013 <0.014 0.012 +/- 0.001 (B) Not collected due to loss of power during the sample run time.

2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1460 +/- 0.0087 <0.0145 <0.0011 <0.0008 0.0137 +/- 0.0028 H32 0.1420 +/- 0.0090 <0.0146 <0.0008 <0.0006 0.0157 +/- 0.0028 H33 0.1670 +/- 0.0098 <0.0215 <0.0010 <0.0008 <0.0100 80 l P a g e

3.a. SURFACE WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H13 20-Oct-20 <137 201 +/- 21 <4 <4 <6 <3 <8 <6 <4 <3 <4 <4 10-Nov-20 <137 198 +/- 20 <4 <3 <6 <4 <7 <5 <4 <3 <4 <4 22-Dec-20 <137 <35 <3 <3 <6 <4 <7 <6 <4 <3 <4 <4 H36 20-Oct-20 <137 308 +/- 25 <4 <4 <7 <3 <8 <6 <4 <4 <4 <4 10-Nov-20 94 +/- 44 311 +/- 25 <3 <4 <7 <4 <7 <6 <5 <3 <4 <4 22-Dec-20 <137 353 +/- 26 <3 <3 <7 <3 <8 <6 <4 <3 <3 <4 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 Site Date These samples previously collected.

3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Collection Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 Site Date These samples previously collected.

81 l P a g e

3.d. GROUND WATER - (pCi/L)

Sample Collection Zr-95 Ba-140 Site Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Cs-134 Cs-137 La-140 (A) (B)

H70 09-Dec-20 <139 <56 <4 <4 <8 <4 <9 <6 <4 <4 <4 <4 H71 09-Dec-20 776 +/- 57 384 +/- 27 <4 <4 <8 <4 <9 <7 <4 <3 <4 <4 H72 09-Dec-20 <139 319 +/- 26 <5 <4 <9 <5 <11 <7 <5 <5 <4 <5 H73 09-Dec-20 <139 91 +/- 13 <4 <4 <8 <4 <10 <7 <5 <5 <4 <5 H74 09-Dec-20 <139 308 +/- 24 <4 <3 <8 <4 <8 <6 <4 <4 <4 <4 H75 09-Dec-20 <139 294 +/- 24 <3 <4 <7 <4 <10 <5 <4 <4 <4 <4 H76 09-Dec-20 <139 <42 <4 <4 <8 <3 <10 <7 <5 <4 <4 <5 H77 09-Dec-20 <139 <87 <6 <6 <11 <6 <15 <10 <9 <5 <9 <7 H78 09-Dec-20 <139 <53 <3 <4 <7 <4 <8 <6 <5 <4 <4 <4 H79 09-Dec-20 <139 <87 <4 <4 <6 <4 <10 <7 <5 <4 <4 <7 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

(B) - These tabulated LLD values are for Ba-140, either based on direct measurement of Ba-140 or based on ingrowth of La-140, whichever method yields the greater sensitivity for a given sample.

82 l P a g e

4.a. GARDEN CROP - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 H41 This sample has not been available.

4.b. CITRUS - (pCi/kg, wet weight)

Sample Collection Date Site Be-7 K-40 I-131 Cs-134 Cs-137 H23 This sample previously collected.

P a g e l 83

10. Results from the 2020 BRC Interlaboratory Comparison Program DOE MAPEP Series 42 and ERA RAD-121 BRC Results Matrix: RdF Air Filter (Bq/filter)

Flag Acceptance Radionuclide Result Ref. Value (Evaluation) Range Mn-54 0.001 ---- A False Positive Co-57 1.523 1.50 A 1.05-1.95 Co-60 1.270 1.23 A 0.86-1.60 Zn-65 1.380 1.18 A 0.83-1.53 Cs-134 0.585 0.600 A 0.420-0.780 Cs-137 0.766 0.735 A 0.515-0.956 Gross Alpha 1.71 1.24 A 0.37-2.11 Gross Beta 2.13 2.00 A 1.00-3.00 Matrix: MaS Soil (Bq/kg)

Flag Acceptance Radionuclide Result Ref. Value (Evaluation) Range K-40 652.00 625 A 438-813 Mn-54 980.20 945 A 662-1229 Co-57 994.20 1071 A 750-1392 Zn-65 804.80 751 A 526-976 Cs-134 1166.54 1114 A 780-1448 Cs-137 1054.0 1020 A 714-1326 Matrix: MaW Water (Bq/L)

Flag Acceptance Radionuclide Result Ref. Value (Evaluation) Range H-3 (pCi/L) 14511 14100 A 12300-15500 Mn-54 19.95 19.6 A 13.7-25.5 Co-57 19.08 19.7 A 13.8-25.6 Zn-65 22.120 22.2 A 15.5-28.9 Cs-134 17.547 18.5 A 13.0-24.1 Cs-137 11.68 11.3 A 7.9-14.7 Gross Alpha 0.891 1.03 A 0.31-1.75 Gross Beta 4.548 4.24 A 2.12-6.36 P a g e l 84

DOE MAPEP Series 43 and ERA RAD-123 BRC Results Matrix: RdF Air Filter (Bq/filter)

Flag Acceptance Radionuclide Result Ref. Value (Evaluation) Range Mn-54 1.433 1.40 A 0.98-1.82 Co-57 0.005 ---- A False Positive Co-60 1.632 1.73 A 1.21-2.25 Zn-65 2.117 2.00 A 1.40-2.60 Cs-134 1.561 1.83 A 1.28-2.38 Cs-137 0.944 0.996 A 0.697-1.295 Gross Alpha 0.549 0.528 A 0.158-0.898 Gross Beta 1.022 0.915 A 0.458-1.373 Matrix: MaS Soil (Bq/kg)

Flag Acceptance Radionuclide Result Ref. Value (Evaluation) Range K-40 573.94 622 A 435-809 Mn-54 579.44 610 A 427-793 Co-57 936.42 1100 A 770-1430 Zn-65 448.06 470 A 329-611 Cs-134 682.26 710 A 497-923 Cs-137 0.80 ---- A False Positive Matrix: MaW Water (Bq/L)

Flag Acceptance Radionuclide Result Ref. Value (Evaluation) Range H-3 (pCi/L) 23997 23200 A 20300-25500 Mn-54 0.010 ---- A False Positive Co-57 -0.015 ---- A False Positive Zn-65 17.212 16.9 A 11.8-22.0 Cs-134 13.549 15.2 A 10.6-19.8 Cs-137 14.268 14.3 A 10.0-18.6 Gross Alpha 0.847 0.62 A 0.19-1.05 Gross Beta 0.998 0.83 A 0.42-1.25 P a g e l 85

L-2021-083, Annual Radiological Environmental Operating Report for Calendar Year 2020

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L-2021-083, Annual Radiological Environmental Operating Report for Calendar Year 2020

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