Text

Annual Radiological Environmental Operating Report for Calendar Year 2021
	ML22103A121
Person / Time
Site:	Saint Lucie
Issue date:	04/13/2022
From:	Godes W; Florida Power & Light Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	L-2022-062
	Download: ML22103A121 (85)
	v • d • e

Florida Power & Light Company 6501 S. Ocean Drive, Jensen Beach, FL 34957 April 13, 2022 L-2022-062 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 2021 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 2021.

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

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

Enclosure:

2021 Annual Radiological Environmental Operating Report cc:

USNRC Senior Resident Inspector, St. Lucie Units 1 and 2

2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERA TING REPORT ST. LUCIE PLANT UNITS 1 & 2 LICENSE NOS. DPR-67, NPF-1 6 DOCKET NOS. 50-335, 50-389 Prepared by:

J

1 l P a g e 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 & Light Company -

St. Lucie Site 24 A. First Quarter 2021 B. Second Quarter 2021 C. Third Quarter 2021 D. Fourth Quarter 2021

10. Results from the Interlaboratory Comparison Program - 2021 82

2 l P a g e

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 radiological environmental monitoring program also supplements the radioactive 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 weekly. Analyses include Iodine-131 and gross beta weekly, and gamma isotopic measurements of composite quarterly by location.

c. Surface water samples are collected from two locations. The indicator samples are collected and analyzed weekly, while control samples are collected and analyzed monthly. 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

3 l P a g e analyzed semi-annually. Sediment samples are analyzed by gamma isotopic measurements.

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 PSL is conducted by the State of Florida, Department of Health (DOH), Bureau of Radiation Control (BRC).

Samples are collected and analyzed by DOH field and laboratory personnel, respectively. The samples are analyzed at the DOH BRC Environmental Radiation Control Laboratory in Orlando, Florida.

C. Analytical Results Summarized analysis data and results for all specified samples collected and 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. Samples not meeting the specified "a priori" LLD, if any, are noted and explained in Section 6. Detailed analysis data and results for all samples collected and analyzed by the BRC during the surveillance period is provided in Section 9.

D. Land Use Census A Land Use Census survey out to a five-mile radius around PSL 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). Results for the interlaboratory comparison program are listed in Section 10.

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3.

Discussion and Interpretation of Results A. Reporting of Results This AREOR contains the summaries, interpretations, and information required by the PSL 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 PSL operation. These include nuclides such as Be-7, K-40, Th-232, and Ra-226 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 indicated no trends attributable to plant effluents and were consistent with past measurements. No detectable I-131 was present in any of the radioiodine samples. Gamma isotopic measurements yielded no indication of any nuclides attributed to PSL 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 surface water in 3 out of 52 weekly ODCM-required indicator location samples and 1 out of 12 monthly control location samples. The highest amount of tritium reported was 12% of the required Lower Limit of Detection (LLD) for non-drinking water listed in ODCM Table 4.12-1 and 1.2% of the reporting level for non-drinking water 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 and fish 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 in any indicator samples or control samples. Crustacean samples were not able to be collected during the surveillance period. 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 indicator samples and was present in 1 of the 12 control location samples. The amount of Cs-137 reported was 15% of the required LLD listed in ODCM Table 4.12-1 and 0.6% of the reporting level listed in ODCM Table 3.12-2.There were no indications of any other nuclides attributable to plant effluents.

6. Land Use Census Two changes were identified as compared to the 2020 Land Use Census results; two previously identified gardens were no longer present. No locations within a 5-mile radius of PSL were identified with gardens or 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% greater than locations currently being sampled as part of the REMP were identified by the Land Use Census.

7. Interlaboratory Comparison Program The State of Florida DOH BRC laboratory participated in MAPEP Series 44, MAPEP Series 45, and the ERA RadCheM Study 125 with satisfactory results.

This satisfied the requirements for the Interlaboratory Comparison Program as directed in the PSL ODCM.

6 l P a g e C. Conclusions The data obtained through the PSL 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 due to station operation. Measured exposure rates are consistent with the exposure rates observed during the pre-operational surveillance program.

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

The highest value for tritium in surface water, based on 3 positive indicator samples, was 12% of the required LLD listed in ODCM Table 4.12-1 and 1.2%

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 product samples that could be attributed to plant effluents.

The amount of Cs-137 reported in the single positive broad leaf vegetation control sample was 15% of the required LLD listed in ODCM Table 4.12-1 and 0.6% of the reporting level listed in ODCM Table 3.12-2. There were no indications of any other nuclides attributable to plant effluents.

REMP sample analyses 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 period, 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 All Indicator Locations Control Location Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Exposured 108 3.22 (104/104)

NW-10 4.09 (4/4) 3.37 (4/4) 2.27-4.35 9.6 mi., NW 3.48-4.35 3.06-3.62 PATHWAY: DIRECT RADIATION SAMPLES COLLECTED: TLD UNITS: micro-R/hr Location with Highest Annual Mean Number of Analyses Performed Lower Limit of Detectiona (LLD)

Type of Analyses Number of Non-Routine Reported Measurements = 0.

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Air Particulates/Radioiodine All Indicator Locations Control Location Mean (f)b Namec Mean (f)b Mean (f)b Range Distance &

Direction Range Range 131I 260 0.012

<MDA (0/208)

<MDA (0/52)

Gross Beta 260 0.0064 0.0147 (202/208)

H30 0.015 (50/52) 0.015 (52/52) 0.004-0.028 2 mi., W 0.004-0.028 0.003-0.025 Composite Gamma 100 7Be 0.006 0.1297 (16/16)

H14 0.1382 (4/4) 0.1344 (4/4) 0.0738-0.1880 1 mi., SE 0.0999-0.1880 0.0967-0.1750 40K 0.018

<MDA (0/16)

<MDA (0/4) 134Cs 0.0008

<MDA (0/16)

<MDA (0/4) 137Cs 0.0008

<MDA (0/16)

<MDA (0/4) 210Pb 0.0105 (4/16)

H30 0.0145 (1/4) 0.0099 (2/4) 0.0063-0.0145 2 mi., W 0.0145-0.0145 0.0065-0.0132 Number of Non-Routine Reported Measurements = 0.

Be-7, K-40, and Pb-210 are naturally occurring.

Location with Highest Annual Mean PATHWAY: AIRBORNE SAMPLES COLLECTED: RADIOIODINE AND PARTICULATES UNITS: pico-Ci/M3 Type of Analyses Number of Analyses Performed Lower Limit of Detectiona (LLD)

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Waterborne, Surface Water All Indicator Locations Control Locations Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Tritium 64 172 206 (3/52)

H15 206 (3/52) 94 (1/12) 106-360

<1mi., ENE/E/ESE 106-360 94-94 Gamma Isotopic 704 40K 58 350 (52/52)

H15 350 (52/52) 343 (12/12) 300-430

<1mi., ENE/E/ESE 300-430 288-382 54Mn 3

<MDA (0/52)

<MDA (0/12) 59Fe 6

<MDA (0/52)

<MDA (0/12) 58Co 3

<MDA (0/52)

<MDA (0/12) 60Co 4

<MDA (0/52)

<MDA (0/12) 65Zn 7

<MDA (0/52)

<MDA (0/12) 95Zr-Nb 6-3

<MDA (0/52)

<MDA (0/12) 131I 4

<MDA (0/52)

<MDA (0/12) 134Cs 4

<MDA (0/52)

<MDA (0/12) 137Cs 4

<MDA (0/52)

<MDA (0/12) 140Ba-La 9-3

<MDA (0/52)

<MDA (0/12)

Lower Limit of Detectiona (LLD)

Type of Analyses Number of Analyses Performed Number of Non-Routine Reported Measurements = 0.

PATHWAY: WATERBORNE SAMPLES COLLECTED: SURFACE WATER UNITS: pico-Ci/LITER Location with Highest Annual Mean K-40 is naturally occurring.

10 l P a g e IV.

Waterborne, Sediment and Food Products All Indicator Locations Control Locations Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Gamma Isotopic 44 7Be 56 75 (1/2)

H-15 75 (1/2)

<MDA (0/2) 75-75

<1mi, ENE/E/ESE 75-75 40K 100 212 (2/2)

H15 212 (2/2) 136 (2/2) 184-239

<1mi, ENE/E/ESE 184-239 102-169 58Co 6

<MDA (0/2)

<MDA (0/2) 60Co 7

<MDA (0/2)

<MDA (0/2) 134Cs 7

<MDA (0/2)

<MDA (0/2) 137Cs 7

<MDA (0/2)

<MDA (0/2) 210Pb

<MDA (0/2)

<MDA (0/2) 226Ra 15 285 (1/2)

H15 285 (1/2) 245 (1/2) 285-285

<1mi, ENE/E/ESE 285-285 245-245 232Th 25 53 (1/2)

H15 53 (1/2)

<MDA (0/2) 53-53

<1mi, ENE/E/ESE 53-53 235U 18 (1/2)

H15 18 (1/2) 15 (1/2) 18-18

<1mi, ENE/E/ESE 18-18 15-15 238U 132 (2/2)

H15 132 (2/2) 120 (2/2)43-220

<1mi, ENE/E/ESE 43-220 80-160 Number of Non-Routine Reported Measurements = 0.

Be-7, K-40, Pb-210, Ra-226, Th-232, U-235, and U-238 are naturally occurring.

Type of Analyses Location with Highest Annual Mean PATHWAY: WATERBORNE SAMPLES COLLECTED: SHORELINE SEDIMENT UNITS: pico-Ci/kg DRY Lower Limit of Detectiona (LLD)

Number of Analyses Performed

11 l P a g e Per Technical Specification 3.12.4 and the ODCM, In the event that some individual results are not available for inclusion with the report, the report shall be submitted noting and explaining the reasons for the missing results. The missing data shall be submitted as soon as possible in a supplementary report. After repeated attempts, crustacean samples were unable to be obtained during the surveillance period. The crabs normally collected live under large rocks in the deepest part of the canal (25+ feet deep). The crabs are collected while free-diving, which only allows a few seconds for a diver on the canal bottom to flip a rock and collect the specimen. Crab traps were deployed but were not able to be placed in the areas where the crabs live. St. Lucie Nuclear Chemistry personnel are continuing to work with the DOH BRC staff on a method to reliably obtain crustaceans for analysis is 2022.

Unable to collect sample during 2021.

All Indicator Locations Control Locations Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Gamma Isotopic 0

40K 270 54Mn 16 58Co 15 60Co 16 134Cs 16 137Cs 18 226Ra 300 228Ra 58 59Fe 28 65Zn 32 PATHWAY: INGESTION SAMPLES COLLECTED: CRUSTACEA UNITS: pico-Ci/kg WET Location with Highest Annual Mean K-40, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

Lower Limit of Detectiona (LLD)

Number of Analyses Performed Type of Analyses

12 l P a g e V.

Broad Leaf Vegetation All Indicator Locations Control Locations Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Gamma Isotopic 40 40K 270 2640 (2/2)

H15 2640 (2/2) 2455 (2/2) 2500-2780

<1mi., ENE/E/ESE 2500-2780 2410-2500 54Mn 16

<MDA (0/2)

<MDA (0/2) 58Co 15

<MDA (0/2)

<MDA (0/2) 60Co 16

<MDA (0/2)

<MDA (0/2) 134Cs 16

<MDA (0/2)

<MDA (0/2) 137Cs 18

<MDA (0/2)

<MDA (0/2) 226Ra 300

<MDA (0/2)

<MDA (0/2) 228Ra 58

<MDA (0/2)

<MDA (0/2) 59Fe 28

<MDA (0/2)

<MDA (0/2) 65Zn 32

<MDA (0/2)

Location with Highest Annual Mean K-40, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

Type of Analyses Number of Analyses Performed Lower Limit of Detectiona (LLD)

PATHWAY: INGESTION SAMPLES COLLECTED: FISH UNITS: pico-Ci/kg WET All Indicator Locations Control Locations Mean (f)b Name Mean (f)b Mean (f)b Range Distance & Direction Range Range Gamma Isotopic 324 7Be 64 1333 (24/24)

H51 1412 (12/12) 976 (12/12) 385-3010 1mi., N/NNW 385-3010 483-1460 40K 120 3519 (24/24)

H51 3929 (12/12) 2514 (12/12) 1830-5110 1mi., N/NNW 1850-5110 2040-3270 131I 8

<MDA (0/24)

<MDA (0/12) 134Cs 8

<MDA (0/24)

<MDA (0/12) 137Cs 8

<MDA (0/24) 12 (1/12) 12-12 210Pb 261 (12/24)

H52 296 (6/12) 126 (2/12) 130-455 1mi., S/SSE 166-455 108-143 212Pb 37 (3/24)

H51 37 (3/12) 35 (3/12) 24-56 1mi., N/NNW 24-56 24-40 226Ra 189

<MDA (0/24)

<MDA (0/12) 228Ra 29

<MDA (0/24)

<MDA (0/12)

Type of Analyses Be-7, K-40, Pb-210, Pb-212, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

PATHWAY: INGESTION SAMPLES COLLECTED: BROADLEAF VEGETATION UNITS: pico-Ci/kg WET Location with Highest Annual Mean Lower Limit of Detectiona (LLD)

Number of Analyses Performed

13 l P a g e NOTES

a. The LLD is an "a priori" value 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 are at the time of sample measurement.

Minimum Detectable Activity (MDA) reported in the Quarterly Reports (Section 9) for the individual samples have been corrected to the time of sample collection.

b. Mean and Range are based upon detectable measurements only. The 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.

14 l P a g e VI.

Land Use Census The PSL Annual Land Use Census Survey was performed during the months of June and July 2021. Two changes were identified as compared to the 2020 Land Use Census; 2 previously identified gardens no longer existed within the SSW and WSW sectors. No locations with a garden or with potential milk-producing animals (cows or goats) were identified within a 5-mile radius of the St. Lucie Plant.

2021 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

SE (A) 1.5 / 142° (B) 1.6 / 145° O

O SSE (A) 1.8 / 147°g (B) 2.0 / 149° Lf L

S 3.3 / 190° L

L SSW 2.2 / 212° L

L SW 1.9 / 234° L

L WSW 1.9 / 240° L

L W

1.9 / 260° L

L WNW 2.3 / 281° L

L NW 3.4 / 304° L

L NNW (A) 2.7 / 344° (B) 2.8 / 343° L

L

15 l P a g e NOTES

a.

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

b.

The format used to denote location is:

distance (miles) / bearing (degrees).

For example, 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 the sector is predominantly an ocean area.

f.

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

g.

Non-residential occupied buildings in this sector include:

Sector Distance Description SSE (A) 1.8 / 147° Fire Station

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5.

Deviations / Missing Data Instances of missing data and air sampler partial run times are listed below.

A. Pathway:

Ingestion - Food Products (Crustacea)

Location:

H15 (Ocean side vicinity of St. Lucie Plant)

Dates:

1/1/21 - 12/31/21 (2 semi-annual indicator samples)

Deviation:

Failure to perform environmental surveillance.

==

Description:==

Crustaceans were not able to be located and collected for semi-annual analysis during 2021.

Corrective Action:

Continue working with BRC field team staff in 2022 to obtain crustacea for analysis. Report results, when available, in a supplemental report per the ODCM.

B. Pathway:

Ingestion - Food Products (Crustacea)

Location:

H59 (Near south end of Hutchinson Island)

Dates:

1/1/21 - 12/31/21 (2 semi-annual control samples)

Deviation:

Failure to perform environmental surveillance.

==

Description:==

Crustaceans were not able to be located and collected for semi-annual analysis during 2021.

Corrective Action:

Continue working with BRC field team staff in 2022 to obtain crustacea for analysis. Report results, when available, in a supplemental report per the ODCM.

C. Pathway:

Airborne: Radioiodine and Particulates Location:

H34 (Onsite - at Meteorological Tower)

Dates:

03/30/21-04/08/21 Deviation:

Failure to perform continuous monitoring.

==

Description:==

Sample pump failure during the sampling week. Estimated run time for the week was 111 hours0.00128 days 0.0308 hours 1.835317e-4 weeks 4.22355e-5 months out of 217 (106 hours0.00123 days 0.0294 hours 1.752645e-4 weeks 4.0333e-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 ODCM Table 4.12-1 Detection Capabilities For Environmental Sample Analysis 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

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

19 l P a g e PATHWAY: Direct Radiation SAMPLES COLLECTED: TLD SAMPLE FREQUENCY: Quarterly 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 Location Name Direction Sector Approximate Distance (Miles)

Description

20 l P a g e PATHWAY: Airborne SAMPLES COLLECTED: Radioiodine and Particulates SAMPLE FREQUENCY: Weekly PATHWAY: Waterborne SAMPLES COLLECTED: Surface Water (Ocean)

SAMPLE FREQUENCY: H-15 Weekly; H-59 Monthly SAMPLES COLLECTED: Shoreline Sediment SAMPLE FREQUENCY: Semi-Annually PATHWAY: Ingestion - Food Products SAMPLES COLLECTED: Crustacea and Fish SAMPLE FREQUENCY: Semi-Annually SAMPLES COLLECTED: Broad Leaf Vegetation - Food Products SAMPLE FREQUENCY: Monthly 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 Location Name Direction Sector Approximate 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 Location Name Direction Sector Approximate 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 Location Name Direction Sector Approximate 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 Location Name Direction Sector Approximate 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 Location Name Direction Sector Approximate Distance (Miles)

Description

21 l P a g e

8.

Ground Water Protection - Industry Initiative A. Description of Program Quarterly ground water sampling was performed by the State of Florida Department of Health (DOH), Bureau of Radiation Control (BRC), pursuant to an agreement between FPL and the DOH as part of the ODCM REMP sampling program. Samples were analyzed for tritium and principle gamma emitters, and tritium was the only fission product identified. Naturally occurring potassium (K-40) was identified occasionally.

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 PSLs Protected Area. The two locations with the St. Lucie Plant ID ending in S (H70 and H73) are shallower wells adjacent (within a few feet) to a deeper well at the same location.

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

22 l P a g e B. St. Lucie 2021 Tritium Results(1) Summary (pCi/L)

State ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter H70

<142 94

<136

<133 H71 511 413 386 541 H72

<142

<134

<136

<133 H73

<136

<134

<136

<133 H74

<136

<134

<136

<131 H75

<142

<134

<136

<131 H76

<142

<134

<136

<133 H77

<142

<134

<136

<131 H78

<142

<139

<136

<131 H79

<142

<139 105

<133

1. Samples analyzed for H3 and principle gamma emitters; tritium was the only fission product identified. Naturally occurring K-40 was occasionally identified.

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

24 l P a g e

9.

Radiological Surveillance of Florida Power & Light Company - St. Lucie Site A. First Quarter 2021 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FIRST QUARTER 2021 BUREAU OF RADIATION CONTROL

25 l P a g e ST. LUCIE SITE Offsite Dose Calculation Manual Sampling First Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of 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

0 4.a.2. Fish Semiannually 2

0 4.b. Broadleaf Vegetation Monthly 3

9 Total: 184 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.

26 l P a g e

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

Sample Site Deployment 15-Dec-20 Collection 11-Mar-21 Sample Site Deployment 15-Dec-20 Collection 11-Mar-21 N-1 3.16 +/- 0.12 SW-2 3.19 +/- 0.22 NNW-5 3.15 +/- 0.37 SW-5 3.66 +/- 0.71 NNW-10 3.88 +/- 0.34 SW-10 3.28 +/- 0.57 NW-5 3.13 +/- 0.16 SSW-2 3.23 +/- 0.32 NW-10 4.35 +/- 0.34 SSW-5 3.55 +/- 0.39 WNW-2 3.22 +/- 0.26 SSW-10 3.01 +/- 0.45 WNW-5 3.56 +/- 0.02 S-5 3.36 +/- 0.63 WNW-10 3.17 +/- 0.39 S-10 3.04 +/- 0.11 W-2 3.28 +/- 0.44 S/SSE-10 3.51 +/- 0.16 W-5 3.67 +/- 0.37 SSE-5 3.22 +/- 0.43 W-10 2.77 +/- 0.36 SSE-10 3.14 +/- 0.36 WSW-2 3.39 +/- 0.30 SE-1 3.04 +/- 0.39 WSW-5 3.48 +/- 0.12 H-32 3.27 +/- 0.48 WSW-10 2.88 +/- 0.25

27 l P a g e 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 05-Jan-21

<0.03

<0.03 13-Jan-21

<0.01

<0.01 20-Jan-21

<0.01

<0.01 26-Jan-21

<0.02

<0.02 03-Feb-21

<0.02

<0.02 09-Feb-21

<0.03

<0.02

<0.03

<0.03 16-Feb-21

<0.02

<0.02 23-Feb-21

<0.02

<0.02 03-Mar-21

<0.01

<0.01 10-Mar-21

<0.02

<0.02 17-Mar-21

<0.02

<0.02 22-Mar-21

<0.04

<0.04 30-Mar-21

<0.02

28 l P a g e 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 05-Jan-21 0.011 +/- 0.002 0.015 +/- 0.002 0.013 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 13-Jan-21 0.024 +/- 0.002 0.025 +/- 0.002 0.023 +/- 0.002 0.024 +/- 0.002 0.021 +/- 0.002 20-Jan-21 0.022 +/- 0.002 0.018 +/- 0.002 0.019 +/- 0.002 0.019 +/- 0.002 0.021 +/- 0.002 26-Jan-21 0.013 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 0.017 +/- 0.002 03-Feb-21 0.016 +/- 0.002 0.011 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.015 +/- 0.002 09-Feb-21 0.021 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.002 16-Feb-21 0.004 +/- 0.001 0.004 +/- 0.001 0.006 +/- 0.002 0.004 +/- 0.001 0.005 +/- 0.001 23-Feb-21 0.011 +/- 0.002 0.010 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 0.010 +/- 0.002 03-Mar-21 0.013 +/- 0.002 0.010 +/- 0.002 0.012 +/- 0.002 0.013 +/- 0.002 0.009 +/- 0.002 10-Mar-21 0.018 +/- 0.002 0.017 +/- 0.002 0.016 +/- 0.002 0.012 +/- 0.002 0.011 +/- 0.002 17-Mar-21 0.019 +/- 0.002 0.025 +/- 0.002 0.024 +/- 0.002 0.024 +/- 0.002 0.023 +/- 0.002 22-Mar-21 0.014 +/- 0.002 0.014 +/- 0.002 0.016 +/- 0.002 0.014 +/- 0.002 0.017 +/- 0.002 30-Mar-21 0.010 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 0.009 +/- 0.002 Average:

0.015 +/- 0.002 0.015 +/- 0.001 0.016 +/- 0.002 0.015 +/- 0.001 0.014 +/- 0.001 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 0.1440 +/- 0.0093

<0.0150

<0.0012

<0.0009

<0.0152 H12 0.1750 +/- 0.0112

<0.0160

<0.0010

<0.0009

<0.0106 H14 0.1880 +/- 0.0104

<0.0125

<0.0013

<0.0009

<0.0157 H30 0.1460 +/- 0.0084

<0.0171

<0.0009

<0.0008 0.0145 +/- 0.0029 H34 0.1300 +/- 0.0080

<0.0182

<0.0009

<0.0008 0.0127 +/- 0.0026

29 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H15 05-Jan-21

<136 370 +/- 31

<4

<9

<4

<7

<8

<4

<6 13-Jan-21

<136 376 +/- 27

<3

<7

<4

<7

<6

<4

<4 20-Jan-21

<137 348 +/- 27

<3

<4

<6

<4

<7

<5

<4

<4 26-Jan-21

<137 414 +/- 29

<3

<7

<3

<8

<6

<4

<3

<4

<4 03-Feb-21

<142 384 +/- 27

<3

<6

<4

<7

<6

<4

<3

<4 09-Feb-21

<136 361 +/- 27

<4

<3

<7

<3

<8

<6

<4

<4 16-Feb-21

<136 345 +/- 26

<3

<7

<4

<8

<7

<4

<3

<4

<4 23-Feb-21

<142 309 +/- 24

<4

<8

<4

<8

<6

<4

<3

<4

<4 03-Mar-21

<136 366 +/- 27

<3

<7

<4

<8

<5

<4

<3

<4

<4 11-Mar-21

<139 346 +/- 26

<3

<7

<4

<8

<6

<4

<4 17-Mar-21

<138 430 +/- 29

<3

<4

<6

<3

<7

<6

<3

<4 22-Mar-21

<138 354 +/- 26

<4

<3

<8

<3

<7

<6

<4

<3

<4

<4 30-Mar-21

<138 425 +/- 29

<3

<8

<3

<7

<4

<3

<4

<4 H59 13-Jan-21

<136 371 +/- 27

<3

<7

<4

<7

<6

<4

<3

<4

<4 17-Feb-21

<136 332 +/- 26

<4

<3

<7

<4

<8

<6

<3

<4

<4 11-Mar-21

<139 288 +/- 24

<3

<7

<3

<8

<7

<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.

30 l P a g e 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 17-Feb-21

<78 184 +/- 32

<7

<6

<7

<339

<232

<49

<34 43 +/- 21 H59 17-Feb-21

<67 169 +/- 43

<8

<7

<330

<188

<62

<12 80 +/- 21 4.a.1. CRUSTACEA - (pCi/kg, wet weight)

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

H59 4.a.2. FISH - (pCi/kg, wet weight)

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

H59

31 l P a g e 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 13-Jan-21 1780 +/- 65 4550 +/- 177

<9

<8

<10 130 +/- 28

<20

<220

<38 17-Feb-21 1250 +/- 55 3400 +/- 150

<9

<248

<18

<213

<40 11-Mar-21 1620 +/- 63 1850 +/- 103

<10

<8

<9

<669

<19

<215

<33 H52 13-Jan-21 1970 +/- 75 3000 +/- 145

<12

<10

<11 455 +/- 84

<21

<235

<49 17-Feb-21 1310 +/- 58 1830 +/- 109

<9

<10

<10 330 +/- 75

<14

<229

<38 11-Mar-21 1490 +/- 60 3910 +/- 158

<14

<8

<9

<107

<18

<200

<38 H59 13-Jan-21 1160 +/- 46 2780 +/- 117

<9

<7

<8

<84

<16

<170

<31 17-Feb-21 715 +/- 44 2040 +/- 113

<9

<10 108 +/- 66 24 +/- 6

<222

<39 11-Mar-21 692 +/- 38 2140 +/- 105

<11

<7

<8

<545

<15

<187

<26

32 l P a g e ST. LUCIE SITE Supplemental Sampling First Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of 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

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.

33 l P a g e

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

Sample Site Deployment 15-Dec-20 Collection 11-Mar-21 H08 3.66 +/- 0.24 H09 3.71 +/- 0.38 H12 7.24 +/- 0.21 H14 3.52 +/- 0.44 H33 3.48 +/- 0.33 H34 3.31 +/- 0.43 H60 3.35 +/- 0.50 H61 4.58 +/- 0.55 H62 3.82 +/- 0.55 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 05-Jan-21

<0.03

<0.03 13-Jan-21

<0.01

<0.01 20-Jan-21

<0.01

<0.01 26-Jan-21

<0.02

<0.02 03-Feb-21

<0.02

<0.02 09-Feb-21

<0.03

<0.03 16-Feb-21

<0.02

<0.03

<0.03 23-Feb-21

<0.02

<0.02 03-Mar-21

<0.01

<0.01 10-Mar-21

<0.02

<0.02 17-Mar-21

<0.02

<0.02 22-Mar-21

<0.04

<0.04 30-Mar-21

<0.02

34 l P a g e 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 05-Jan-21 0.010 +/- 0.002 0.014 +/- 0.002 0.013 +/- 0.002 13-Jan-21 0.027 +/- 0.002 0.025 +/- 0.002 0.022 +/- 0.002 20-Jan-21 0.023 +/- 0.002 0.019 +/- 0.002 0.016 +/- 0.002 26-Jan-21 0.017 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 03-Feb-21 0.015 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 09-Feb-21 0.020 +/- 0.002 0.019 +/- 0.002 0.010 +/- 0.002 16-Feb-21 0.004 +/- 0.001 0.005 +/- 0.002 0.006 +/- 0.002 23-Feb-21 0.008 +/- 0.001 0.011 +/- 0.002 0.011 +/- 0.002 03-Mar-21 0.009 +/- 0.002 0.012 +/- 0.002 0.011 +/- 0.002 10-Mar-21 0.015 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 17-Mar-21 0.019 +/- 0.002 0.024 +/- 0.002 0.017 +/- 0.002 22-Mar-21 0.015 +/- 0.002 0.012 +/- 0.002 0.013 +/- 0.002 30-Mar-21 0.011 +/- 0.002 0.013 +/- 0.002 0.010 +/- 0.002 Average:

0.015 +/- 0.001 0.015 +/- 0.001 0.014 +/- 0.001 2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1630 +/- 0.0087

<0.0184

<0.0010

<0.0007 0.0117 +/- 0.0026 H32 0.1620 +/- 0.0110

<0.0144

<0.0010

<0.0008 0.0123 +/- 0.0036 H33 0.1490 +/- 0.0093

<0.0164

<0.0013

<0.0009

<0.0148

35 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H13 13-Jan-21

<136 262 +/- 23

<3

<6

<4

<7

<6

<4

<4 17-Feb-21

<136 291 +/- 24

<3

<7

<3

<7

<6

<4

<3

<4 11-Mar-21

<139 330 +/- 26

<3

<7

<3

<8

<6

<4

<3

<4 H36 13-Jan-21

<136 308 +/- 25

<4

<3

<8

<4

<8

<7

<4

<4 17-Feb-21 561 +/- 53 371 +/- 28

<3

<7

<4

<9

<6

<3

<4

<4 11-Mar-21

<139 345 +/- 26

<4

<6

<3

<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 Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 17-Feb-21

<93 397 +/- 54

<8

<7

<341

<187

<66

<12 51 +/- 21 H16 17-Feb-21

<73 192 +/- 31

<7

<6

<7

<254

<223

<50

<14 67 +/- 20 H19 17-Feb-21

<62 174 +/- 44

<8

<7

<319

<203

<64

<13 145 +/- 44 H36 17-Feb-21

<159 4280 +/- 177

<22

<18

<17 23 +/- 5 4800 +/- 349 627 +/- 78 119 +/- 25 40 +/- 5 844 +/- 46

36 l P a g e 3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 17-Feb-21

<71 253 +/- 49

<9

<7

<8

<7

<383

<206

<66

<13 77 +/- 20 H16 17-Feb-21

<85 110 +/- 41

<9

<6

<7

<327

<203

<61

<13

<91 H19 17-Feb-21

<89

<129

<8

<7

<302

<204

<63

<13 240 +/- 46

37 l P a g e 3.d. GROUND WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H70 22-Feb-21

<142

<78

<4

<3

<8

<4

<8

<6

<5

<4

<5

<6 H71 22-Feb-21 511 +/- 53 344 +/- 34

<4

<5

<8

<4

<9

<7

<5

<4

<7 H72 22-Feb-21

<142 302 +/- 26

<4

<8

<4

<11

<8

<5

<4

<5

<4 H73 22-Feb-21

<136 65 +/- 13

<4

<3

<7

<4

<10

<7

<4

<4 H74 22-Feb-21

<136 233 +/- 22

<3

<4

<7

<4

<10

<6

<4

<4 H75 22-Feb-21

<142 276 +/- 24

<3

<4

<7

<4

<9

<6

<4

<3

<5

<4 H76 22-Feb-21

<142

<79

<4

<8

<4

<9

<7

<6

<4

<5

<8 H77 22-Feb-21

<142

<42

<3

<7

<3

<8

<5

<4

<3

<5 H78 22-Feb-21

<142

<55

<4

<7

<4

<9

<6

<5

<4

<5 H79 22-Feb-21

<142

<37

<4

<3

<6

<3

<8

<6

<4

<3

<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.

38 l P a g e 4.a. GARDEN CROP - (pCi/kg, wet weight)

Sample Site Collection 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 Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 H23 22-Feb-21

<35 1730 +/- 74

<4

<5

39 l P a g e B. Second Quarter 2021 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT SECOND QUARTER 2021 BUREAU OF RADIATION CONTROL ST. LUCIE SITE

40 l P a g e Offsite Dose Calculation Manual Sampling Second Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of 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

0 4.a.2. Fish Semiannually 2

2 4.b. Broadleaf Vegetation Monthly 3

9 Total: 184 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.

41 l P a g e

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

Sample Site Deployment 11-Mar-21 Collection 16-Jun-21 Sample Site Deployment 11-Mar-21 Collection 16-Jun-21 N-1 3.25 +/- 0.38 SW-2 3.11 +/- 0.27 NNW-5 3.22 +/- 0.35 SW-5 3.62 +/- 0.34 NNW-10 3.96 +/- 0.10 SW-10 3.46 +/- 0.51 NW-5 3.11 +/- 0.30 SSW-2 3.43 +/- 0.18 NW-10 4.21 +/- 0.81 SSW-5 3.79 +/- 0.54 WNW-2 3.30 +/- 0.26 SSW-10 2.93 +/- 0.60 WNW-5 3.30 +/- 0.62 S-5 3.34 +/- 0.11 WNW-10 3.29 +/- 0.21 S-10 3.24 +/- 1.02 W-2 2.79 +/- 0.60 S/SSE-10 3.53 +/- 0.67 W-5 3.33 +/- 0.36 SSE-5 3.20 +/- 0.27 W-10 2.78 +/- 0.25 SSE-10 2.91 +/- 0.28 WSW-2 3.35 +/- 0.20 SE-1 3.25 +/- 0.37 WSW-5 3.60 +/- 0.10 H-32 3.51 +/- 0.24 WSW-10 2.94 +/- 0.37

42 l P a g e 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 08-Apr-21

<0.02

<0.03 (A) 14-Apr-21

<0.02

<0.02 21-Apr-21

<0.02

<0.02 27-Apr-21

<0.02

<0.02 03-May-21

<0.02

<0.02 10-May-21

<0.03

<0.03 17-May-21

<0.02

<0.02 26-May-21

<0.01

<0.01 02-Jun-21

<0.02

<0.01

<0.02

<0.01 08-Jun-21

<0.03

<0.03 15-Jun-21

<0.02

<0.02 22-Jun-21

<0.02

<0.02 28-Jun-21

<0.02

<0.02 (A) Due to failed vacuum pump, run time was estimated at 111 hours0.00128 days 0.0308 hours 1.835317e-4 weeks 4.22355e-5 months out of 217.

43 l P a g e 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 08-Apr-21 0.022 +/- 0.002 0.022 +/- 0.002 0.021 +/- 0.002 0.023 +/- 0.002 0.022 +/- 0.003 (A) 14-Apr-21 0.021 +/- 0.003 0.020 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 0.016 +/- 0.002 21-Apr-21 0.021 +/- 0.002 0.021 +/- 0.002 0.023 +/- 0.002 0.027 +/- 0.002 0.021 +/- 0.002 27-Apr-21 0.023 +/- 0.003 0.023 +/- 0.003 0.023 +/- 0.003 0.024 +/- 0.003 0.021 +/- 0.002 03-May-21 0.020 +/- 0.002 0.015 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 10-May-21 0.017 +/- 0.002 0.017 +/- 0.002 0.014 +/- 0.002 0.015 +/- 0.002 0.014 +/- 0.002 17-May-21 0.013 +/- 0.002 0.011 +/- 0.002 0.014 +/- 0.002 0.012 +/- 0.002 0.011 +/- 0.002 26-May-21 0.013 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 0.014 +/- 0.002 02-Jun-21 0.021 +/- 0.002 0.023 +/- 0.002 0.023 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 08-Jun-21 0.007 +/- 0.002 0.006 +/- 0.002 0.010 +/- 0.002 0.010 +/- 0.002 0.007 +/- 0.002 15-Jun-21 0.007 +/- 0.002 0.009 +/- 0.002 0.008 +/- 0.001 0.006 +/- 0.001 0.011 +/- 0.002 22-Jun-21 0.020 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 0.015 +/- 0.002 0.010 +/- 0.002 28-Jun-21 0.011 +/- 0.002 0.011 +/- 0.002 0.016 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 Average:

0.017 +/- 0.001 0.016 +/- 0.001 0.017 +/- 0.001 0.017 +/- 0.001 0.015 +/- 0.001 (A) Due to failed vacuum pump, run time was estimated at 111 hours0.00128 days 0.0308 hours 1.835317e-4 weeks 4.22355e-5 months out of 217.

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 0.1440 +/- 0.0099

<0.0149

<0.0014

<0.0010

<0.0151 H12 0.1440 +/- 0.0087

<0.0181

<0.0009

<0.0007 0.0132 +/- 0.0027 H14 0.1470 +/- 0.0101

<0.0138

<0.0013

<0.0007

<0.0146 H30 0.1690 +/- 0.0114

<0.0197

<0.0012

<0.0010

<0.0108 H34 0.1410 +/- 0.0112

<0.0168

<0.0011

<0.0008

<0.0114

44 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H15 08-Apr-21

<134 328 +/- 25

<3

<7

<4

<7

<5

<4

<4 14-Apr-21 360 +/- 49 379 +/- 27

<4

<3

<7

<4

<8

<6

<3

<4

<4 21-Apr-21

<134 332 +/- 26

<3

<4

<7

<4

<8

<6

<4

<3

<4

<4 27-Apr-21 152 +/- 44 379 +/- 27

<4

<3

<8

<4

<8

<5

<4

<3

<4 03-May-21

<134 341 +/- 26

<4

<6

<3

<9

<5

<4

<4 10-May-21

<135 331 +/- 32

<4

<7

<4

<8

<7

<5

<4

<5 17-May-21

<140 323 +/- 26

<4

<3

<7

<4

<8

<5

<4

<3

<4 26-May-21

<139 321 +/- 25

<4

<3

<7

<3

<7

<5

<3

<4

<4 02-Jun-21

<139 348 +/- 26

<3

<7

<4

<7

<6

<4

<4 08-Jun-21

<139 344 +/- 26

<4

<6

<4

<7

<6

<4

<3

<4 16-Jun-21

<139 337 +/- 26

<3

<4

<6

<4

<8

<6

<4

<4 22-Jun-21

<139 370 +/- 27

<3

<6

<3

<8

<5

<4

<3

<4

<5 28-Jun-21

<139 339 +/- 25

<3

<7

<3

<7

<6

<4

<3

<4 H59 14-Apr-21 94 +/- 43 327 +/- 26

<3

<6

<3

<8

<6

<4

<4 11-May-21

<135 354 +/- 26

<4

<3

<7

<3

<8

<6

<5

<3

<4 10-Jun-21

<139 340 +/- 26

<3

<4

<7

<4

<7

<5

<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.

45 l P a g e 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 These samples previously collected.

H59 4.a.1. CRUSTACEA - (pCi/kg, wet weight)

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

H59 4.a.2. FISH - (pCi/kg, wet weight)

Sample Site Collection Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 21-Apr-21 2500 +/- 171

<18

<16

<38

<19

<39

<20

<22

<388

<74 H59 23-Apr-21 2410 +/- 159

<18

<17

<35

<18

<41

<16

<21

<379

<66

46 l P a g e 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 14-Apr-21 1320 +/- 58 3990 +/- 170

<9

<10

<11 383 +/- 88 24 +/- 7

<220

<46 11-May-21 587 +/- 38 3660 +/- 150

<10

<8

<585

<17

<198

<32 10-Jun-21 385 +/- 33 4980 +/- 197

<9

<10

<617 56 +/- 8

<210

<37 H52 14-Apr-21 859 +/- 45 3430 +/- 149

<10

<8

<7

<701

<20

<227

<39 11-May-21 998 +/- 53 3480 +/- 156

<11

<9

<9 288 +/- 86

<20

<223

<43 10-Jun-21 583 +/- 36 2730 +/- 123

<8

<7

<9

<536

<16

<189

<32 H59 14-Apr-21 851 +/- 47 2520 +/- 126

<9

<194

<19

<205

<41 11-May-21 483 +/- 37 3270 +/- 146

<10

<9

<10

<216

<13

<218

<40 10-Jun-21 1100 +/- 50 2080 +/- 109

<9

<8

<9

<223 40 +/- 7

<208

<39

47 l P a g e ST. LUCIE SITE Supplemental Sampling Second Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of 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.

48 l P a g e

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

Sample Site Deployment 11-Mar-21 Collection 16-Jun-21 H08 3.46 +/- 0.57 H09 3.78 +/- 0.72 H12 7.73 +/- 0.69 H14 3.64 +/- 0.10 H33 3.49 +/- 0.54 H34 3.44 +/- 0.14 H60 3.43 +/- 0.42 H61 4.70 +/- 0.32 H62 3.75 +/- 0.11 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 08-Apr-21

<0.02

<0.02 14-Apr-21

<0.02

<0.02 21-Apr-21

<0.02

<0.01 27-Apr-21

<0.02

<0.02 03-May-21

<0.02

<0.02 10-May-21

<0.03

<0.03 17-May-21

<0.02

<0.02 26-May-21

<0.01

<0.01 02-Jun-21

<0.02

<0.02 08-Jun-21

<0.03

<0.02 15-Jun-21

<0.02

<0.02 22-Jun-21

<0.02

<0.05 (A)

<0.02 28-Jun-21

<0.02

<0.02 (A) Due to failed vacuum pump, run time was estimated at 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months out of 168.

49 l P a g e 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 08-Apr-21 0.019 +/- 0.002 0.022 +/- 0.002 0.011 +/- 0.001 14-Apr-21 0.021 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.002 21-Apr-21 0.022 +/- 0.002 0.025 +/- 0.002 0.019 +/- 0.002 27-Apr-21 0.022 +/- 0.002 0.021 +/- 0.002 0.020 +/- 0.002 03-May-21 0.018 +/- 0.002 0.018 +/- 0.002 0.011 +/- 0.002 10-May-21 0.018 +/- 0.002 0.019 +/- 0.002 0.020 +/- 0.002 17-May-21 0.007 +/- 0.002 0.008 +/- 0.002 0.006 +/- 0.001 26-May-21 0.013 +/- 0.001 0.014 +/- 0.002 0.011 +/- 0.001 02-Jun-21 0.019 +/- 0.002 0.024 +/- 0.002 0.016 +/- 0.002 08-Jun-21 0.011 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 15-Jun-21 0.007 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 22-Jun-21 0.015 +/- 0.002 0.008 +/- 0.003 0.015 +/- 0.002 28-Jun-21 0.013 +/- 0.002

<0.006 0.010 +/- 0.002 Average:

0.016 +/- 0.001

<0.015 0.013 +/- 0.001 2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1530 +/- 0.0114

<0.0169

<0.0010

<0.0007 0.0072 +/- 0.0033 H32 0.1330 +/- 0.0090

<0.0161

<0.0009

<0.0008

<0.0099 H33 0.1190 +/- 0.0091

<0.0144

<0.0011

<0.0009

<0.0143

50 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H13 14-Apr-21

<135 316 +/- 25

<3

<8

<4

<8

<6

<4

<4 11-May-21

<135 352 +/- 26

<3

<8

<3

<7

<6

<4

<4 10-Jun-21

<139 393 +/- 28

<3

<4

<6

<3

<8

<5

<4

<3

<4 H36 14-Apr-21 22398 +/- 213 298 +/- 24

<4

<3

<7

<4

<7

<6

<4

<4 11-May-21 1065 +/- 61 304 +/- 25

<4

<3

<6

<3

<8

<6

<4

<3

<4 10-Jun-21

<134 346 +/- 26

<3

<8

<4

<8

<6

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

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

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

51 l P a g e 3.d. GROUND WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H70 07-Jun-21 94 +/- 45

<67

<4

<8

<4

<9

<7

<5

<4

<5

<8 H71 07-Jun-21 413 +/- 50 380 +/- 34

<5

<4

<8

<4

<9

<7

<5

<4

<5

<8 H72 07-Jun-21

<134 296 +/- 25

<4

<7

<4

<10

<7

<5

<4

<4 H73 07-Jun-21

<134 81 +/- 14

<4

<7

<4

<8

<7

<4

<4 H74 07-Jun-21

<134 315 +/- 25

<3

<4

<7

<4

<10

<6

<4

<4 H75 07-Jun-21

<134 235 +/- 22

<3

<4

<7

<4

<10

<6

<4

<4 H76 07-Jun-21

<134

<45

<4

<7

<4

<9

<7

<5

<4

<8 H77 07-Jun-21

<134

<67

<4

<7

<4

<8

<7

<4

<10 H78 07-Jun-21

<139 56 +/- 13

<5

<4

<8

<4

<9

<7

<5

<4

<8 H79 07-Jun-21

<139

<51

<3

<4

<6

<3

<7

<6

<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.

52 l P a g e 4.a. GARDEN CROP - (pCi/kg, wet weight)

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

53 l P a g e C. Third Quarter 2021 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT THIRD QUARTER 2021 BUREAU OF RADIATION CONTROL ST. LUCIE SITE

54 l P a g e Offsite Dose Calculation Manual Sampling Third Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of 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

0 4.a.2. Fish Semiannually 2

0 4.b. Broadleaf Vegetation Monthly 3

9 Total: 184 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 Site Deployment 16-Jun-21 Collection 23-Sep-21 Sample Site Deployment 16-Jun-21 Collection 23-Sep-21 N-1 2.68 +/- 0.33 SW-2 2.75 +/- 0.50 NNW-5 2.41 +/- 0.24 SW-5 3.43 +/- 0.93 NNW-10 3.13 +/- 0.38 SW-10 2.75 +/- 0.14 NW-5 2.56 +/- 0.13 SSW-2 2.73 +/- 0.48 NW-10 3.48 +/- 0.56 SSW-5 3.15 +/- 0.54 WNW-2 2.68 +/- 0.29 SSW-10 2.27 +/- 0.45 WNW-5 2.75 +/- 0.22 S-5 2.79 +/- 0.30 WNW-10 2.68 +/- 0.26 S-10 2.72 +/- 0.54 W-2 2.79 +/- 0.38 S/SSE-10 2.89 +/- 0.13 W-5 2.93 +/- 0.35 SSE-5 2.75 +/- 0.50 W-10 2.44 +/- 0.45 SSE-10 3.03 +/- 0.34 WSW-2 2.63 +/- 0.26 SE-1 2.68 +/- 0.61 WSW-5 2.83 +/- 0.17 H-32 3.06 +/- 0.13 WSW-10 2.59 +/- 0.53

56 l P a g e 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 07-Jul-21

<0.01

<0.01 14-Jul-21

<0.02

<0.02 21-Jul-21

<0.02

<0.02 28-Jul-21

<0.02

<0.02 04-Aug-21

<0.03

<0.04 11-Aug-21

<0.03

<0.03 18-Aug-21

<0.02

<0.02 25-Aug-21

<0.02

<0.02 01-Sep-21

<0.02

<0.02 08-Sep-21

<0.02

<0.01

<0.02

<0.01

<0.01 15-Sep-21

<0.01

<0.01 22-Sep-21

<0.02

<0.02 29-Sep-21

<0.02

57 l P a g e 2.b.1 AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 07-Jul-21 0.006 +/- 0.001 0.009 +/- 0.002 0.005 +/- 0.001 0.008 +/- 0.002

<0.005 14-Jul-21 0.011 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 21-Jul-21 0.011 +/- 0.002 0.014 +/- 0.002 0.012 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 28-Jul-21 0.013 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 04-Aug-21 0.010 +/- 0.002 0.006 +/- 0.002 0.006 +/- 0.002 0.012 +/- 0.002 0.015 +/- 0.002 11-Aug-21 0.008 +/- 0.002 0.009 +/- 0.002 0.006 +/- 0.002 0.009 +/- 0.002 0.006 +/- 0.002 18-Aug-21 0.006 +/- 0.001 0.009 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 25-Aug-21 0.013 +/- 0.002 0.017 +/- 0.002 0.014 +/- 0.002

<0.005 0.017 +/- 0.002 01-Sep-21 0.014 +/- 0.002 0.017 +/- 0.002 0.013 +/- 0.002 0.028 +/- 0.003 0.012 +/- 0.002 08-Sep-21 0.016 +/- 0.002 0.018 +/- 0.002 0.020 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 15-Sep-21 0.012 +/- 0.002 0.013 +/- 0.002 0.012 +/- 0.002 0.014 +/- 0.002 0.010 +/- 0.002 22-Sep-21 0.004 +/- 0.002 0.004 +/- 0.001

<0.006

<0.007

<0.005 29-Sep-21 0.018 +/- 0.002 0.020 +/- 0.002 0.016 +/- 0.002 0.016 +/- 0.002 0.019 +/- 0.002 Average:

0.011 +/- 0.001 0.012 +/- 0.001

<0.011

<0.013

<0.011 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 0.0889 +/- 0.0072

<0.0168

<0.0008

<0.0009 0.0084 +/- 0.0022 H12 0.0967 +/- 0.0074

<0.0139

<0.0008

<0.0007 0.0065 +/- 0.0022 H14 0.0999 +/- 0.0083

<0.0100

<0.0012

<0.0009

<0.0137 H30 0.0909 +/- 0.0080

<0.0156

<0.0011

<0.0010

<0.0138 H34 0.0738 +/- 0.0068

<0.0146

<0.0009

<0.0008 0.63 +/- 0.0023

58 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H15 07-Jul-21

<139 360 +/- 27

<3

<4

<6

<4

<8

<5

<4

<3

<4

<4 14-Jul-21

<134 347 +/- 26

<3

<7

<3

<7

<5

<4

<3

<4

<4 21-Jul-21

<142 343 +/- 26

<3

<7

<4

<8

<5

<4

<3

<4

<4 28-Jul-21

<142 377 +/- 27

<3

<8

<3

<7

<5

<4

<4 04-Aug-21

<137 380 +/- 38

<5

<13

<5

<11

<43

<4

<18 11-Aug-21

<137 313 +/- 25

<4

<9

<3

<9

<7

<21

<3

<4

<11 18-Aug-21

<137 322 +/- 28

<4

<10

<4

<7

<8

<13

<4

<8 25-Aug-21

<134 321 +/- 25

<4

<7

<4

<8

<6

<3

<4

<5 01-Sep-21

<136 310 +/- 25

<3

<7

<3

<7

<6

<4

<3

<4

<4 08-Sep-21

<134 352 +/- 34

<4

<9

<4

<9

<8

<4

<8 15-Sep-21

<134 356 +/- 26

<4

<3

<7

<3

<7

<5

<3

<4

<4 22-Sep-21

<136 309 +/- 24

<3

<7

<4

<8

<6

<4

<3

<4

<4 29-Sep-21

<136 366 +/- 26

<3

<6

<3

<7

<5

<4

<3

<4 H59 14-Jul-21

<134 313 +/- 26

<4

<3

<7

<4

<8

<5

<4

<3

<5 04-Aug-21

<137 352 +/- 34

<4

<5

<11

<4

<10

<9

<39

<3

<4

<19 09-Sep-21

<134 382 +/- 27

<3

<8

<3

<9

<6

<4

<3

<4 3

- These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

4

- 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.

59 l P a g e 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 09-Sep-21 75 +/- 30 239 +/- 52

<11

<8

<9

<392 285 +/- 71 53 +/- 15 18 +/- 4 220 +/- 24 H59 09-Sep-21

<89 102 +/- 28

<8

<6

<8

<7

<299 245 +/- 76

<46 15 +/- 5 160+/- 24 4.a.1 CRUSTACEA - (pCi/kg, wet weight)

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

H59 This sample not yet collected.

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

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

H59 This sample not yet collected.

60 l P a g e 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 14-Jul-21 1610 +/- 64 4500 +/- 182

<10

<9

<11

<242

<20

<210

<40 04-Aug-21 938 +/- 57 3610 +/- 159

<52

<9

<10 158 +/- 64

<19

<209

<42 09-Sep-21 1750 +/- 67 3120 +/- 143

<9

<9 160 +/- 69 31 +/- 7

<230

<37 H52 14-Jul-21 1480 +/- 68 2830 +/- 150

<13

<11

<278

<23

<261

<49 04-Aug-21 1810 +/- 72 3070 +/- 133

<45

<8

<11

<98

<18

<217

<33 09-Sep-21 1350 +/- 58 3140 +/- 146

<10

<8

<10 259 +/- 81

<20

<231

<40 H59 14-Jul-21 1460 +/- 66 2760 +/- 139

<13

<11 12 +/- 3

<128

<24

<289

<51 04-Aug-21 1330 +/- 60 2110 +/- 102

<41

<8

<10

<90

<16

<196

<34 09-Sep-21 1100 +/- 55 2810 +/- 138

<10

<12 143 +/- 77 40 +/- 6

<229

<40

61 l P a g e ST. LUCIE SITE Supplemental Sampling Third Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of Samples

1. Direct Radiation Quarterly 9

8

2. Airborne 2.a. Air Iodines Weekly 3

39 2.b. Air Particulates Weekly 3

39 4 Waterborne 4.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

3 4.b. Citrus Annually 1

0 Total: 112 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.

62 l P a g e

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

Sample Site Deployment 16-Jun-21 Collection 23-Sep-21 H08 3.25 +/- 0.51 H09 3.31 +/- 0.54 H12 6.00 +/- 0.74 H14 2.78 +/- 0.42 H33 2.85 +/- 0.87 H34 2.58 +/- 0.51 H60 2.75 +/- 0.71 H61 3.35 +/- 0.29 H62 (A)

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

Collection Date H09 H32 H33 07-Jul-21

<0.01

<0.01 14-Jul-21

<0.02

<0.02 21-Jul-21

<0.02

<0.02 28-Jul-21

<0.02

<0.02 04-Aug-21

<0.03

<0.04

<0.04 11-Aug-21

<0.03

<0.03 18-Aug-21

<0.02

<0.02 25-Aug-21

<0.02

<0.02 01-Sep-21

<0.02

<0.02 08-Sep-21

<0.01

<0.02 15-Sep-21

<0.01

<0.01 22-Sep-21

<0.02

<0.02 29-Sep-21

<0.02

<0.03

63 l P a g e 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 07-Jul-21 0.007 +/- 0.001 0.008 +/- 0.001 0.003 +/- 0.001 14-Jul-21 0.013 +/- 0.002 0.017 +/- 0.002 0.011 +/- 0.002 21-Jul-21 0.016 +/- 0.002 0.016 +/- 0.002 0.009 +/- 0.002 28-Jul-21 0.010 +/- 0.002 0.009 +/- 0.002 0.013 +/- 0.002 04-Aug-21 0.009 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 11-Aug-21 0.007 +/- 0.002 0.007 +/- 0.002 0.010 +/- 0.002 18-Aug-21 0.010 +/- 0.002 0.007 +/- 0.002 0.009 +/- 0.001 25-Aug-21 0.020 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.001 01-Sep-21 0.012 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 08-Sep-21 0.012 +/- 0.002 0.013 +/- 0.002 0.004 +/- 0.002 15-Sep-21 0.017 +/- 0.002 0.015 +/- 0.002 0.015 +/- 0.002 22-Sep-21 0.005 +/- 0.002

<0.006

<0.007 29-Sep-21 0.013 +/- 0.002 0.016 +/- 0.002 0.015 +/- 0.002 Average:

0.012 +/- 0.001

<0.012

<0.010 2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1170 +/- 0.0096

<0.0111

<0.0011

<0.0009

<0.0143 H32 0.0828 +/- 0.0068

<0.0137

<0.0006

<0.0008 0.0091 +/- 0.0026 H33 0.0971 +/- 0.0083

<0.0124

<0.0012

<0.0009

<0.0148

64 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H13 14-Jul-21

<134 343 +/- 26

<3

<4

<6

<4

<7

<6

<4

<3

<4

<4 04-Aug-21

<137 200 +/- 21

<4

<5

<11

<3

<7

<36

<4

<14 09-Sep-21

<134 255 +/- 23

<3

<4

<7

<3

<7

<5

<4

<3

<4 H36 14-Jul-21

<134 288 +/- 24

<4

<3

<8

<4

<7

<6

<5

<4

<4 04-Aug-21

<137 364 +/- 27

<4

<12

<4

<9

<7

<38

<3

<4

<16 09-Sep-21

<134 285 +/- 24

<3

<6

<4

<7

<6

<4

<3

<4

3. - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

4. - 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 Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 09-Sep-21 125 +/- 24 720 +/- 66

<10

<7

<348 257 +/- 64

<58 16 +/- 4 81 +/- 22 H16 09-Sep-21

<79 169 +/- 48

<9

<7

<350

<195

<63

<12 91 +/- 20 H19 09-Sep-21 109 +/- 27 89 +/- 44

<9

<7

<366

<185

<58

<12 107 +/- 27 H36 09-Sep-21

<194 7640 +/- 379

<22

<19

<15 16 +/- 6 4680 +/- 313

<344 373 +/- 30 60 +/- 12 849 +/- 49

65 l P a g e 3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Site Collection Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 09-Sep-21

<98 104 +/- 44

<9

<7

<8

<383 319 +/- 66 33 +/- 14 20 +/- 4 146 +/- 22 H16 09-Sep-21

<96 68 +/- 27

<8

<6

<7

<293

<235

<38

<15 165 +/- 41 H19 09-Sep-21 109 +/- 29

<139

<9

<6

<7

<326 171 +/- 62

<58 11 +/- 4 102 +/- 21

66 l P a g e 3.d. GROUND WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H70 29-Sep-21

<136

<50

<4

<7

<4

<10

<6

<5

<4

<4 H71 29-Sep-21 386 +/- 49 346 +/- 26

<4

<7

<4

<10

<7

<4

<4 H72 29-Sep-21

<136 323 +/- 25

<4

<8

<4

<12

<7

<5

<5 H73 29-Sep-21

<136

<66

<3

<8

<4

<8

<7

<4

<5 H74 29-Sep-21

<136 294 +/- 24

<3

<4

<7

<3

<8

<7

<6

<4

<6 H75 29-Sep-21

<136 253 +/- 23

<4

<6

<4

<8

<6

<4

<4 H76 29-Sep-21

<136

<46

<4

<7

<4

<8

<6

<3

<4

<5 H77 29-Sep-21

<136

<71

<4

<8

<3

<8

<7

<4

<5

<7 H78 29-Sep-21

<136 68 +/- 24

<4

<8

<4

<10

<7

<3

<4

<6 H79 29-Sep-21 105 +/- 44

<43

<4

<3

<8

<3

<7

<6

<3

<6 (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.

67 l P a g e 4.a. GARDEN CROP - (pCi/kg, wet weight)

Sample Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 H41 (WNW-10) 04-Aug-21 1150 +/- 61 2920 +/- 131

<87

<9 12 +/- 3 H41A (WNW) 11-Aug-21 1440 +/- 67 4700 +/- 184

<47

<9

<10 H41B (NW) 11-Aug-21 791 +/- 58 2550 +/- 135

<69

<11

<11 Note: In lieu of garden crop, which was unavailable, broad leaf vegetation sampling was performed at the site boundary in each of two different direction sectors with the highest predicted D/Qs (WNW and NW) and one sample of similar broad leaf vegetation at an available location 15-30 kilometers distant in the least prevalent wind direction based upon historical data in the ODCM (WNW-10).

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

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

68 l P a g e D. Fourth Quarter 2021 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FOURTH QUARTER 2021 BUREAU OF RADIATION CONTROL

69 l P a g e ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Fourth Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of 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

0 4.a.2. Fish Semiannually 2

2 4.b. Broadleaf Vegetation Monthly 3

9 Total: 184 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 SAL030A.

70 l P a g e

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

Sample Site Deployment 23-Sep-21 Collection 16-Dec-21 Sample Site Deployment 23-Sep-21 Collection 16-Dec-21 N-1 3.01 +/- 0.46 SW-2 3.15 +/- 0.16 NNW-5 3.31 +/- 0.55 SW-5 3.96 +/- 0.26 NNW-10 4.10 +/- 0.41 SW-10 3.46 +/- 0.18 NW-5 3.25 +/- 0.24 SSW-2 3.29 +/- 0.17 NW-10 4.30 +/- 0.36 SSW-5 3.82 +/- 0.05 WNW-2 3.24 +/- 0.12 SSW-10 3.16 +/- 0.34 WNW-5 3.82 +/- 0.32 S-5 3.26 +/- 0.33 WNW-10 3.38 +/- 0.50 S-10 3.27 +/- 0.27 W-2 3.25 +/- 0.05 S/SSE-10 3.75 +/- 0.40 W-5 3.75 +/- 0.49 SSE-5 3.44 +/- 0.43 W-10 3.05 +/- 0.15 SSE-10 3.60 +/- 0.09 WSW-2 3.50 +/- 0.57 SE-1 3.29 +/- 0.36 WSW-5 3.42 +/- 0.26 H-32 3.62 +/- 0.18 WSW-10 2.89 +/- 0.15

71 l P a g e 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 06-Oct-21

<0.03

<0.03 13-Oct-21

<0.02

<0.01

<0.01 20-Oct-21

<0.03

<0.03 26-Oct-21

<0.02

<0.02 02-Nov-21

<0.02

<0.02 10-Nov-21

<0.02

<0.02 16-Nov-21

<0.02

<0.02 23-Nov-21

<0.02

<0.03

<0.03 02-Dec-21

<0.02

<0.02 08-Dec-21

<0.02

<0.02 15-Dec-21

<0.03

<0.02

<0.03

<0.02 21-Dec-21

<0.01

<0.02

<0.02 29-Dec-21

<0.02

72 l P a g e 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 06-Oct-21 0.021 +/- 0.002 0.021 +/- 0.002 0.016 +/- 0.002 0.021 +/- 0.002 0.021 +/- 0.002 13-Oct-21 0.009 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 0.012 +/- 0.002 0.013 +/- 0.002 20-Oct-21 0.023 +/- 0.002 0.022 +/- 0.002 0.020 +/- 0.002 0.025 +/- 0.002 0.022 +/- 0.002 26-Oct-21 0.016 +/- 0.002 0.016 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 0.018 +/- 0.002 02-Nov-21 0.015 +/- 0.002 0.016 +/- 0.002 0.016 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 10-Nov-21 0.014 +/- 0.002 0.003 +/- 0.001 0.013 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 16-Nov-21 0.017 +/- 0.002 0.019 +/- 0.002 0.022 +/- 0.003 0.019 +/- 0.003 0.017 +/- 0.002 23-Nov-21

<0.006 0.008 +/- 0.002 0.011 +/- 0.002 0.008 +/- 0.002 0.007 +/- 0.002 02-Dec-21 0.018 +/- 0.002 0.018 +/- 0.002 0.025 +/- 0.002 0.022 +/- 0.002 0.019 +/- 0.002 08-Dec-21 0.021 +/- 0.002 0.016 +/- 0.002 0.022 +/- 0.002 0.023 +/- 0.003 0.018 +/- 0.002 15-Dec-21 0.011 +/- 0.002 0.014 +/- 0.002 0.014 +/- 0.002 0.010 +/- 0.002 0.014 +/- 0.002 21-Dec-21 0.011 +/- 0.002 0.007 +/- 0.002 0.004 +/- 0.002 0.005 +/- 0.002 0.007 +/- 0.002 29-Dec-21 0.018 +/- 0.002 0.018 +/- 0.002 0.024 +/- 0.002 0.021 +/- 0.002 0.022 +/- 0.002 Average:

<0.015 0.015 +/- 0.001 0.016 +/- 0.002 0.016 +/- 0.002 0.016 +/- 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 0.1320 +/- 0.0093

<0.0136

<0.0013

<0.0009

<0.0159 H12 0.1220 +/- 0.0089

<0.0155

<0.0014

<0.0009

<0.0147 H14 0.1180 +/- 0.0079

<0.0140

<0.0009

<0.0007 0.0127 +/- 0.0029 H30 0.1340 +/- 0.0096

<0.0142

<0.0013

<0.0010 0.0133 +/- 0.0031 H34 0.1300 +/- 0.0082

<0.0149

<0.0009

<0.0007

<0.0096

73 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H15 06-Oct-21

<136 353 +/- 34

<4

<7

<4

<9

<6

<4

<8 13-Oct-21 106 +/- 44 343 +/- 26

<4

<8

<4

<7

<3

<4

<5 20-Oct-21

<136 300 +/- 26

<4

<3

<7

<3

<8

<6

<4

<4 26-Oct-21

<136 333 +/- 25

<3

<7

<3

<8

<6

<4

<3

<4 02-Nov-21

<135 393 +/- 28

<3

<7

<3

<9

<6

<4

<3

<4 10-Nov-21

<140 302 +/- 25

<4

<3

<8

<3

<8

<6

<4

<4 16-Nov-21

<139 332 +/- 26

<3

<7

<4

<7

<5

<3

<4

<4 23-Nov-21

<139 364 +/- 27

<3

<8

<3

<7

<5

<3

<4

<4 02-Dec-21

<132 358 +/- 29

<3

<8

<4

<8

<5

<6

<3

<4

<5 08-Dec-21

<136 335 +/- 25

<3

<4

<7

<3

<7

<6

<4

<3

<4

<4 15-Dec-21

<132 363 +/- 35

<4

<7

<4

<8

<7

<6

<3

<4

<6 21-Dec-21

<131 350 +/- 26

<3

<7

<3

<8

<6

<4

<4 29-Dec-21

<132 321 +/- 34

<4

<10

<4

<9

<7

<8

<4

<6 H59 07-Oct-21

<136 380 +/- 27

<3

<7

<3

<9

<6

<3

<4 03-Nov-21

<135 321 +/- 25

<3

<6

<4

<8

<5

<3

<4

<3

<4 01-Dec-21

<136 355 +/- 32

<4

<8

<5

<8

<7

<6

<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.

74 l P a g e 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

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

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

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

H59 This sample unable to be collected.

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

Sample Site Collection Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 03-Dec-21 2780 +/- 216

<20

<50

<21

<53

<23

<20

<414

<89 H59 27-Dec-21 2500 +/- 197

<19

<22

<42

<21

<53

<22

<24

<395

<98

75 l P a g e 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 07-Oct-21 3010 +/- 96 3880 +/- 163

<17

<9

<11 156 +/- 35

<22

<261

<47 03-Nov-21 1070 +/- 59 4500 +/- 190

<11

<12

<13 365 +/- 99

<19

<262

<50 01-Dec-21 1620 +/- 62 5110 +/- 192

<10

<8

<9

<101

<18

<217

<37 H52 07-Oct-21 1010 +/- 51 3180 +/- 140

<13

<8

<11 280 +/- 77

<17

<190

<38 03-Nov-21 920 +/- 51 3460 +/- 152

<10

<11 166 +/- 69

<22

<228

<43 01-Dec-21 1280 +/- 54 3240 +/- 141

<9

<8

<9

<611

<16

<201

<35 H59 07-Oct-21 756 +/- 46 2750 +/- 130

<12

<8

<11

<202

<16

<193

<32 03-Nov-21 837 +/- 49 2470 +/- 123

<11

<10

<12

<240

<20

<215

<43 01-Dec-21 1230 +/- 56 2440 +/- 122

<11

<8

<11

<221

<19

<222

<41

76 l P a g e ST. LUCIE SITE Supplemental Sampling Fourth Quarter, 2021 Sample Type Collection Frequency Number of Sample Locations Number of Samples

1. Direct Radiation Quarterly 9

9

2. Airborne 2.a. Air Iodines Weekly 3

34 2.b. Air Particulates Weekly 3

34

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: 93 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.

77 l P a g e

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

Sample Site Deployment 23-Sep-21 Collection 16-Dec-21 H08 3.85 +/- 0.08 H09 3.90 +/- 0.35 H12 8.02 +/- 0.72 H14 3.87 +/- 0.48 H33 3.73 +/- 0.29 H34 3.54 +/- 0.37 H60 3.62 +/- 0.16 H61 4.85 +/- 0.50 H62 4.12 +/- 0.37 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 06-Oct-21

<0.03

<0.03 13-Oct-21

<0.01

<0.02 20-Oct-21

<0.03

<0.03 26-Oct-21

<0.02

<0.02 02-Nov-21

<0.02

<0.02 10-Nov-21

<0.02

<0.03 16-Nov-21

<0.02

<0.02 23-Nov-21

<0.03

<0.04 02-Dec-21

<0.02

<0.02 (A) 08-Dec-21

<0.02

<0.02 (A) 15-Dec-21

<0.02

<0.03 (A) 21-Dec-21

<0.01

<0.02 (A) 29-Dec-21

<0.02

<0.02 (A)

(A) No power at air station.

78 l P a g e 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 06-Oct-21 0.020 +/- 0.002 0.020 +/- 0.002 0.019 +/- 0.002 13-Oct-21 0.013 +/- 0.002 0.013 +/- 0.002 0.010 +/- 0.002 20-Oct-21 0.022 +/- 0.002 0.025 +/- 0.002 0.015 +/- 0.002 26-Oct-21 0.016 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 02-Nov-21 0.018 +/- 0.002 0.018 +/- 0.002 0.018 +/- 0.002 10-Nov-21 0.012 +/- 0.002 0.012 +/- 0.002 0.016 +/- 0.002 16-Nov-21 0.013 +/- 0.002 0.015 +/- 0.002 0.018 +/- 0.002 23-Nov-21 0.006 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.003 02-Dec-21 0.021 +/- 0.002 0.023 +/- 0.002 (A) 08-Dec-21 0.023 +/- 0.003 0.027 +/- 0.003 (A) 15-Dec-21 0.010 +/- 0.002 0.012 +/- 0.002 (A) 21-Dec-21 0.004 +/- 0.002 0.003 +/- 0.001 (A) 29-Dec-21 0.024 +/- 0.002 0.022 +/- 0.002 (A)

Average:

0.016 +/- 0.001 0.017 +/- 0.001 0.015 +/- 0.003 (A) No power at air station.

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

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1450 +/- 0.0096

<0.0142

<0.0011

<0.0007

<0.0152 H32 0.1380 +/- 0.0082

<0.0166

<0.0010

<0.0007 0.0120 +/- 0.0027 H33 0.0954 +/- 0.0112

<0.0302

<0.0025

<0.0016

<0.0253

79 l P a g e 3.a. SURFACE WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H13 07-Oct-21

<136 343 +/- 26

<3

<6

<3

<8

<6

<4

<3

<4 03-Nov-21 105 +/- 43 288 +/- 24

<3

<4

<6

<4

<8

<6

<4

<3

<4

<4 01-Dec-21

<136 388 +/- 33

<4

<8

<4

<9

<7

<6

<4

<6 H36 07-Oct-21

<136 314 +/- 25

<3

<6

<3

<8

<5

<4

<3

<4

<4 03-Nov-21

<135 332 +/- 26

<3

<8

<4

<8

<6

<4

<3

<4 01-Dec-21

<136 372 +/- 28

<3

<8

<3

<7

<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.

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

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

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

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

80 l P a g e 3.d. GROUND WATER - (pCi/L)

Sample Site Collection Date H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 (A)

I-131 Cs-134 Cs-137 Ba-140 La-140 (B)

H70 20-Dec-21

<133

<78

<4

<7

<4

<8

<7

<8

<4

<6 H71 20-Dec-21 541 +/- 52 363 +/- 27

<3

<4

<8

<4

<8

<6

<8

<4

<5 H72 20-Dec-21

<133 319 +/- 25

<4

<9

<4

<11

<8

<5

<4

<5 H73 20-Dec-21

<133 101 +/- 14

<4

<7

<4

<7

<8

<3

<4

<6 H74 20-Dec-21

<131 293 +/- 24

<4

<7

<4

<10

<6

<5

<4

<4 H75 20-Dec-21

<131 291 +/- 24

<4

<3

<7

<4

<9

<6

<4

<4 H76 20-Dec-21

<133

<83

<4

<5

<8

<4

<10

<8

<5

<4

<5

<9 H77 20-Dec-21

<131

<82

<4

<8

<4

<9

<7

<5

<4

<5

<8 H78 20-Dec-21

<131

<86

<4

<5

<9

<5

<10

<7

<5

<4

<5

<10 H79 20-Dec-21

<133

<59

<4

<9

<3

<10

<7

<8

<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.

81 l P a g e 4.a. GARDEN CROP - (pCi/kg, wet weight)

Sample Site Collection Date Be-7 K-40 I-131 Cs-134 Cs-137 H41 This sample previously collected.

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

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

82 l P a g e

10.

Results from the BRC Interlaboratory Comparison Program - 2021 Flag (Evaluation): A = Acceptable, W = Acceptable with Warning, N = Not Acceptable Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range Mn-54 0.300 0.312 A

0.218 - 0.406 Co-60 0.018 A

False Positive Zn-65 0.358 0.352 A

0.246 - 0.458 Cs-134 1.841 2.14 A

1.50 - 2.78 Cs-137 0.004 A

False Positive Gross Alpha 2.01 1.77 A

0.53 - 3.01 Gross Beta 0.7915 0.649 A

0.325 - 0.974 Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range K-40 620.25 618 A

433 - 803 Mn-54 0.70 A

False Positive Co-60 1320.00 1370 A

423 - 785 Zn-65 630.88 604 A

423 - 785 Cs-134 0.12 A

False Positive Cs-137 1541.25 1550 A

1085 - 2015 U-238 177.62 208 A

146 - 270 Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range H-3 (pCi/L) 15364 14600 A

12800 - 16100 K-40 0.795 A

False Positive Mn-54 16.200 15.5 A

10.9 - 20.2 Co-60 0.10 A

False Positive Zn-65 11.500 10.5 A

7.4 - 13.7 Cs-134 10.908 11.5 A

8.1 - 15.0 Cs-137 8.270 7.9 A

5.5 - 10.3 Ra-226 0.574 0.632 A

0.442 - 0.822 Gross Alpha 0.9495 0.87 A

0.26 - 1.48 Gross Beta 2.712 2.50 A

1.25 - 3.75 DOE MAPEP Series 44 and ERA RAD-125 BRC Results Matrix: Air Filter (Bq/sample)

Matrix: Soil (Bq/kg)

Matrix: Water (Bq/L)

83 l P a g e Flag (Evaluation): A = Acceptable, W = Acceptable with Warning, N = Not Acceptable Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range Mn-54 1.540 1.460 A

1.02 - 1.90 Co-60 2.23 2.28 A

1.60 - 2.96 Zn-65 0.014 A

False Positive Cs-134 1.202 1.32 A

0.92 - 1.72 Cs-137 1.305 1.28 A

0.90 - 1.66 Gross Alpha 1.247 0.96 A

0.288 - 1.632 Gross Beta 0.66 0.553 A

0.277 - 0.830 Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range K-40 578.61 607 A

425 - 789 Mn-54 404.87 410 A

287 - 533 Co-60 679.30 722 A

505 - 939 Zn-65 913.99 907 A

635 - 1179 Cs-134 1152.05 1170 A

819 - 1521 Cs-137 553.85 572 A

400 - 744 U-238 153.89 168 A

118 - 218 Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range K-40 0.547 A

False Positive Mn-54 9.053 9

A 6.3 - 11.7 Co-60 13.45 14 A

9.8 - 18.2 Zn-65 0.277 A

False Positive Cs-134 9.349 10.4 A

7.3 - 13.5 Cs-137

-0.010 A

False Positive Ra-226 0.237 0.226 A

0.158 - 0.294 Gross Alpha 0.254 0.232 A

0.070 - 0.394 Gross Beta 2.642 2.81 A

1.404 - 4.211 DOE MAPEP Series 45 Results Matrix: Air Filter (Bq/sample)

Matrix: Soil (Bq/kg)

Matrix: Water (Bq/L)

L-2022-062, Annual Radiological Environmental Operating Report for Calendar Year 2021

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L-2022-062, Annual Radiological Environmental Operating Report for Calendar Year 2021

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Enclosure:

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