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Annual Radiological Environmental Operating Report for Calendar Year 2022
	ML23094A123
Person / Time
Site:	Saint Lucie
Issue date:	04/04/2023
From:	Strand D; Florida Power & Light Co
To:	; Office of Nuclear Reactor Regulation, Document Control Desk
References
	L-2023-041
	Download: ML23094A123 (1)
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Enclosure L-2023-041 (85 pages follow)

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 2022 B. Second Quarter 2022 C. Third Quarter 2022 D. Fourth Quarter 2022

10. Results from the Interlaboratory Comparison Program - 2022 83

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 analyzed semi-annually. Sediment samples are analyzed by gamma isotopic measurements.

3 l P a g e

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.

4 l P a g e 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 6.4% of the required Lower Limit of Detection (LLD) for non-drinking water listed in ODCM Table 4.12-1 and 0.64% 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.

5 l P a g e

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. 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 present in 1 of the 24 ODCM-required indicator samples and was present in 0 of the 12 control location samples. The amount of Cs-137 reported was 23% of the required LLD listed in ODCM Table 4.12-1 and 0.9% 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 5136 Watersong Way is now the closest residence to the power plant in the Watersong development. 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 47, and the ERA RadCheM Study 131 with satisfactory results. This satisfied the requirements for the Interlaboratory Comparison Program as directed in the PSL ODCM.

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

6 l P a g e 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.

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

x The highest value for tritium in surface water, based on 3 positive indicator samples, was 6.4% of the required LLD listed in ODCM Table 4.12-1 and 0.64%

of the reporting level listed in ODCM Table 3.12-2. There was no indication of any other nuclides attributable to plant effluents.

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

x The amount of Cs-137 reported in the single positive broad leaf vegetation Indicator Location H51 sample was 23% of the required LLD listed in ODCM Table 4.12-1 and 0.9% 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.

7 l P a g e 4.

Environmental Radiological Monitoring Program Annual Summary I.

Direct Radiation 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Exposure (R/hr)

Figure 1 - St. Lucie Direct Radiation Gamma Exposure (via TLD)

All Indicator Locations Avg All Indicator Locations Min All Indicator Locations Max Control Location PATHWAY: DIRECT RADIATION SAMPLES COLLECTED: TLD UNITS: micro-R/hr All Indicator Locations Location with Highest Annual Mean Control Location Type of Analyses Number of Analyses Performed Lower Limit of Detectiona (LLD)

Mean (f)b Namec Mean (f)b Mean (f)b Range Distance &

Direction Range Range Exposured 108 3.78 (100/104)

NW-10 4.69 (4/4) 3.99 (4/4) 2.90-5.13 9.6 mi., NW 4.10-5.13 3.60-4.23 Number of Non-Routine Reported Measurements = 0.

8 l P a g e II.

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 0.021

<MDA (0/208)

<MDA (0/52)

Gross Beta 258 0.0064 0.0135 (206/208)

H14 0.014 (51/52) 0.015 (52/52) 0.001-0.026 1 mi., SE 0.003-0.023 0.004-0.030 Composite Gamma 32 7Be 30 0.006 0.1161 (16/16)

H34 0.1184 (4/4) 0.1256 (4/4) 0.0728-0.1490 0.5 mi., N 0.0728-0.1490 0.0982-0.1510 40K 30 0.018

<MDA (0/16)

<MDA (0/4) 134Cs 30 0.0008

<MDA (0/16)

<MDA (0/4) 137Cs 30 0.0008

<MDA (0/16)

<MDA (0/4) 210Pb 30

<MDA (0/16) 0.0080 (1/4) 0.0080-0.0080 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)

9 l P a g e III.

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

Mean (f)b Namec Mean (f)b Mean (f)b Range Distance &

Direction Range Range Tritium 88 172 126 (3/52)

H15 126 (3/52)

<MDA (0/12)84-191

<1mi.,

ENE/E/ESE 84-191 Gamma Isotopic 88 40K 58 329 (51/52)

H15 329 (51/52) 336 (12/12) 245-397

<1mi.,

ENE/E/ESE 245-397 273-417 54Mn 4

<MDA (0/52)

<MDA (0/12) 59Fe 4

<MDA (0/52)

<MDA (0/12) 58Co 4

<MDA (0/52)

<MDA (0/12) 60Co 8

<MDA (0/52)

<MDA (0/12) 65Zn 4

<MDA (0/52)

<MDA (0/12) 95Zr-Nb 8

<MDA (0/52)

<MDA (0/12) 131I 6

<MDA (0/52)

<MDA (0/12) 134Cs 5

<MDA (0/52)

<MDA (0/12) 137Cs 3

<MDA (0/52)

<MDA (0/12) 140Ba-La 4

<MDA (0/52)

<MDA (0/12)

K-40 is naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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 11 7Be 56

<MDA (0/2)

H-15 75 (1/2)

<MDA (0/2)

<1mi, ENE/E/ESE 75-75 40K 100 296 (2/2)

H15 212 (2/2) 231 (2/2) 179-412

<1mi, ENE/E/ESE 184-239 175-287 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 83 (2/2)

H15 285 (1/2) 41 (1/2) 55-110

<1mi, ENE/E/ESE 285-285 41-41 232Th 25

<MDA (0/2)

<MDA (0/2) 235U 16 (1/2)

H15 18 (1/2) 15 (1/2) 16-16

<1mi, ENE/E/ESE 18-18 15-15 238U

<MDA (0/2)

Lower Limit of Detectiona (LLD)

Number of Analyses Performed 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

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 2023.

All Indicator Locations Control Locations Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Gamma Isotopic 3

40K 270 2097 (3/3)

H-15 3420 (3/3) 1760 (2/2) 1250-3420

<1 mi, ENE/E/ESE 1250-3420 1430-2090 54Mn 16

<MDA (0/3)

<MDA (0/2) 58Co 15

<MDA (0/3)

<MDA (0/2) 60Co 16

<MDA (0/3)

<MDA (0/2) 134Cs 16

<MDA (0/3)

<MDA (0/2) 137Cs 18

<MDA (0/3)

<MDA (0/2) 226Ra 300

<MDA (0/3)

<MDA (0/2) 228Ra 58

<MDA (0/3)

<MDA (0/2) 59Fe 28

<MDA (0/3)

<MDA (0/2) 65Zn 32

<MDA (0/3)

<MDA (0/2)

Number of Non-Routine Reported Measurements = 0.

K-40, Ra-226, and Ra-228 are naturally occurring.

PATHWAY: INGESTION SAMPLES COLLECTED: CRUSTACEA UNITS: pico-Ci/kg WET Location with Highest Annual Mean 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 36 7Be 64 1426 (24/24)

H51 1536 (24/24) 974 (12/12) 758-2790 1mi., N/NNW 953-2790 595-1370 40K 120 3743 (24/24)

H52 3806 (24/24) 2767 (12/12) 2240-5600 1mi., S/SSE 3090-5530 1970-3390 131I 20

<MDA (0/24)

<MDA (0/12) 134Cs 11

<MDA (0/24)

<MDA (0/12) 137Cs 13 18 (1/24) 18 (1/24)

<MDA (0/12) 18-18 18-18 210Pb 693 468 (9/24)

H52 528 (9/24) 558 (3/12) 62-1260 1mi., S/SSE 68-1260 210-1070 212Pb 19 20 (2/24)

H52 20 (2/24)

<MDA (0/12) 19-21 1mi., S/SSE 19-21 226Ra 189 297 (1/24)

H51 297 (1/24)

<MDA (0/12) 297-297 1mi., N/NNW 297-297 228Ra 29

<MDA (0/24)

<MDA (0/12)

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

Mean (f)b Namec Mean (f)b Mean (f)b Range Distance & Direction Range Range Gamma Isotopic 4

40K 270 3190 (2/2)

H15 3190 (2/2) 2830 (2/2) 1630-4750

<1mi., ENE/E/ESE 1630-4750 2760-2900 54Mn 23

<MDA (0/2)

<MDA (0/2) 58Co 25

<MDA (0/2)

<MDA (0/2) 60Co 25

<MDA (0/2)

<MDA (0/2) 134Cs 25

<MDA (0/2)

<MDA (0/2) 137Cs 26

<MDA (0/2)

<MDA (0/2) 226Ra 217

<MDA (0/2)

<MDA (0/2) 228Ra 105

<MDA (0/2)

<MDA (0/2) 59Fe 53

<MDA (0/2)

<MDA (0/2) 65Zn 58

<MDA (0/2)

K-40, Ra-226, and Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0.

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 2022. 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.

2022 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

16 l P a g e 5.

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

A. Pathway:

Surface Water: Radioisotopes Location:

H15 (Ocean side vicinity of St. Lucie Plant)

Dates:

11-1-22 (Weekly samples)

Deviation:

Failure to perform environmental surveillance.

==

Description:==

Sample not taken.

Corrective Action:

BRC field team collected and analyzed samples for the following week.

B. Pathway:

Airborne: Radioiodine and Particulates Location:

H30 (Power Line - 7609 Indian River Drive)

Dates:

02-07-22 to 02-16-22 Deviation:

Sample was missing at the time of collection.

==

Description:==

The particulate sample was missing at the time of collection, therefore was not analyzed.

Corrective Action: Particulate filter was replaced and returned to routine sampling.

C. Pathway:

Airborne: Radioiodine and Particulates Location:

H14 (Onsite - SE Near south property line)

Dates:

05-25-22 to 06-01-22 Deviation:

Sample was missing at the time of collection.

==

Description:==

The particulate sample was missing at the time of collection, therefore was not analyzed.

Corrective Action: Particulate filter was replaced and returned to routine sampling.

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.

17 l P a g e 7.

Key to Sample Locations Site Area Map & Environmental Sample Locations Environmental Sample Locations (10 Miles)

18 l P a g e

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 2022 Tritium Results(1) Summary (pCi/L)

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

<134

<132

<134 H71 (2) 715

<135 436 H72 (2)

<140

<135

<134 H73 (2)

<140

<135

<129 H74 (2)

<140

<135

<129 H75 (2)

<140

<135

<129 H76 (2)

<135

<129 H77 (2)

<140

<132

<129 H78 (2)

<140

<132

<134 H79 (2)

<133

<132

<134

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

2. First Quarter Ground Water samples were not collected by the BRC.

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 2022 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FIRST QUARTER 2022 BUREAU OF RADIATION CONTROL ST. LUCIE SITE

25 l P a g e Offsite Dose Calculation Manual Sampling First Quarter, 2022 Sample Type Collection Frequency Number of Sample Locations Number of Samples

1. Direct Radiation Quarterly 27 24

2. Airborne 2.a. Air Iodines Weekly 5

65 2.b. Air Particulates Weekly 5

64

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: 180 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 - (R/hour)

Sample Site Deployment 15-Dec-21 Collection 11-Mar-22 Sample Site Deployment 15-Dec-21 Collection 11-Mar-22 N-1 3.3 +/- 0.4 SW-2 3.19 +/- 0.22 NNW-5 3.4 +/- 0.5 SW-5 3.66 +/- 0.71 NNW-10 4.0 +/- 0.7 SW-10 3.28 +/- 0.57 NW-5 3.13 +/- 0.16 SSW-2 3.23 +/- 0.32 NW-10 4.1 +/- 0.1 SSW-5 3.55 +/- 0.39 WNW-2 3.2 +/- 0.1 SSW-10 3.01 +/- 0.45 WNW-5 3.5 +/- 0.3 S-5 3.36 +/- 0.63 WNW-10 3.3 +/- 0.2 S-10 3.04 +/- 0.11 W-2 3.3 +/- 0.3 S/SSE-10 3.51 +/- 0.16 W-5 2.9 +/- 0.2 SSE-5 3.22 +/- 0.43 W-10 3.6 +/- 0.2 SSE-10 3.14 +/- 0.36 WSW-2 2.9 +/- 0.2 SE-1 3.04 +/- 0.39 WSW-5 3.5 +/- 0.2 H-32 3.27 +/- 0.48 WSW-10 (A)

(A) TLDs were missing when collection was attempted.

(B) TLD was mistakenly not switched out.

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

Collection Date H08 H12 H14 H30 H34 04-Jan-22

<0.02

<0.02 12-Jan-22

<0.02

<0.02 18-Jan-22

<0.02

<0.02 25-Jan-22

<0.02

<0.02 01-Feb-22

<0.02

<0.02 07-Feb-22

<0.02

<0.02 16-Feb-22

<0.02

<0.02 22-Feb-22

<0.03

<0.03 01-Mar-22

<0.02

<0.02 07-Mar-22

<0.03

<0.03 15-Mar-22

<0.02

<0.02 22-Mar-22

<0.02

<0.02 29-Mar-22

<0.02

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

Collection Date H08 H12 H14 H30 H34 04-Jan-22 0.012 +/- 0.002 0.013 +/- 0.002 0.015 +/- 0.002 0.019 +/- 0.002 0.015 +/- 0.002 12-Jan-22 0.018 +/- 0.002 0.015 +/- 0.002 0.016 +/- 0.002 0.015 +/- 0.002 0.017 +/- 0.002 18-Jan-22 0.024 +/- 0.002 0.018 +/- 0.002 0.018 +/- 0.002 0.020 +/- 0.002 0.019 +/- 0.002 25-Jan-22 0.015 +/- 0.002 0.018 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 0.014 +/- 0.002 01-Feb-22 0.015 +/- 0.002 0.014 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 07-Feb-22 0.015 +/- 0.002 0.016 +/- 0.002 0.022 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 16-Feb-22 0.018 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 (A) 0.015 +/- 0.002 22-Feb-22 0.019 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 0.016 +/- 0.002 0.016 +/- 0.002 01-Mar-22 0.008 +/- 0.002 0.006 +/- 0.002 0.010 +/- 0.002 0.007 +/- 0.002 0.007 +/- 0.002 07-Mar-22 0.014 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 0.019 +/- 0.002 0.013 +/- 0.002 15-Mar-22 0.008 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 0.008 +/- 0.002 0.006 +/- 0.001 22-Mar-22 0.013 +/- 0.002 0.012 +/- 0.002 0.008 +/- 0.002 0.011 +/- 0.002 0.017 +/- 0.002 29-Mar-22 0.014 +/- 0.002 0.015 +/- 0.002 0.020 +/- 0.002 0.016 +/- 0.002 0.020 +/- 0.002 Average:

0.015 +/- 0.001 0.015 +/- 0.001 0.016 +/- 0.001 0.013 +/- 0.001 0.014 +/- 0.001 (A) sample was missing at time of collection 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 0.1450 +/- 0.0095

<0.0149

<0.0012

<0.0009

<0.0157 H12 0.1510 +/- 0.0093

<0.0168

<0.0011

<0.0010

<0.0149 H14 0.1390 +/- 0.0096

<0.0164

<0.0010

<0.0006

<0.0317 H30 0.1280 +/- 0.0091

<0.0132

<0.0012

<0.0010

<0.0145 H34 0.1250 +/- 0.0093

<0.0144

<0.0010

<0.0008

<0.0336

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 04-Jan-22

<137 319 +/- 26

<3

<4

<9

<4

<8

<7

<12

<4

<3

<8 12-Jan-22

<137 259 +/- 23

<3

<4

<8

<4

<7

<6

<5

<3

<6 18-Jan-22

<137 317 +/- 25

<3

<6

<4

<8

<6

<4

<3

<4

<4 25-Jan-22

<137 348 +/- 26

<3

<6

<4

<9

<6

<3

<4

<4 02-Feb-22 84 +/- 42 298 +/- 25

<4

<3

<7

<4

<8

<6

<4

<3

<4

<4 07-Feb-22

<131 352 +/- 26

<4

<3

<8

<3

<8

<6

<4

<4 16-Feb-22

<131 343 +/- 27

<4

<3

<6

<4

<8

<6

<4

<3

<4

<4 22-Feb-22

<135 305 +/- 25

<4

<7

<4

<9

<5

<4

<4 01-Mar-22

<135 320 +/- 31

<4

<9

<4

<8

<7

<4

<3

<4

<6 07-Mar-22

<135 273 +/- 25

<3

<7

<4

<7

<6

<4

<3

<4 15-Mar-22

<135 377 +/- 28

<3

<6

<3

<8

<6

<4

<3

<4

<4 22-Mar-22

<143 336 +/- 27

<3

<6

<4

<8

<6

<4

<3

<4 29-Mar-22

<143 293 +/- 28

<3

<7

<3

<8

<6

<4

<3

<4

<4 H59 05-Jan-22

<137 344 +/- 26

<3

<4

<7

<3

<9

<6

<10

<3

<6 02-Feb-22

<133 288 +/- 24

<3

<7

<3

<7

<5

<4

<3

<4

<4 02-Mar-22

<135 355 +/- 27

<4

<3

<6

<4

<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.

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 These samples not yet 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 25-Mar-22 1630 +/- 124

<16

<17

<28

<15

<28

<16

<17

<302

<56 H59 02-Mar-22 2760 +/- 214

<25

<26

<57

<28

<59

<22

<26

<539

<97

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 05-Jan-22 1630 +/- 80 2570 +/- 149

<37

<12

<15

<315

<24

<284

<51 02-Feb-22 2570 +/- 79 2240 +/- 108

<9

<8

<8 584 +/- 99

<18

<212

<34 02-Mar-22 1560 +/- 68 4590 +/- 193

<11

<12 399 +/- 94

<24

<251

<50 H52 05-Jan-22 1140 +/- 56 3450 +/- 152

<30

<9

<10 278 +/- 73

<18

<207

<40 02-Feb-22 1070 +/- 54 3310 +/- 149

<11

<9

<10

<264

<18

<231

<43 02-Mar-22 1650 +/- 63 3860 +/- 161

<10

<9

<9 308 +/- 74

<19

<202

<39 H59 05-Jan-22 781 +/- 57 2430 +/- 135

<35

<10

<12

<260

<22

<255

<42 02-Feb-22 1130 +/- 56 2940 +/- 137

<11

<9

<11 210 +/- 68

<19

<209

<37 02-Mar-22 1370 +/- 65 2050 +/- 117

<12

<10

<12 394 +/- 96

<22

<252

<46

32 l P a g e ST. LUCIE SITE Supplemental Sampling First Quarter, 2022 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

25 2.b. Air Particulates Weekly 3

25

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 0

4. Ingestion 4.a. Garden Crop Annually 1

0 4.b. Citrus Annually 1

1 Total: 66 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 - (R/hour)

Sample Site Deployment 15-Dec-21 Collection 11-Mar-22 H08 3.8 +/- 0.3 H09 3.8 +/- 0.2 H12 7.5 +/- 1.1 H14 3.8 +/- 0.8 H33 3.5 +/- 0.3 H34 3.5 +/- 0.2 H60 3.4 +/- 0.3 H61 4.5 +/- 0.3 H62 4.0 +/- 0.7 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 04-Jan-22

<0.02

<0.02 (B) 12-Jan-22

<0.02

<0.02 (B) 18-Jan-22

<0.02

<0.02 (B) 25-Jan-22

<0.02

<0.03 (B) 01-Feb-22

<0.02 (A)

(B) 07-Feb-22

<0.02 (A)

<0.02 16-Feb-22

<0.02 (A)

<0.02 22-Feb-22

<0.03 (A)

<0.03 01-Mar-22

<0.02 (A)

<0.02 07-Mar-22

<0.03 (A)

<0.03 15-Mar-22

<0.02 (A)

<0.02 22-Mar-22

<0.02 (A)

<0.02 29-Mar-22

<0.02 (A)

<0.02 (A) Site power was out for extended period (B) Site power was out for extended period

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

Collection Date H09 H32 H33 04-Jan-22 0.015 +/- 0.002 0.012 +/- 0.002 (B) 12-Jan-22 0.018 +/- 0.002 0.014 +/- 0.002 (B) 18-Jan-22 0.025 +/- 0.002 0.020 +/- 0.002 (B) 25-Jan-22 0.018 +/- 0.002 0.021 +/- 0.003 (B) 01-Feb-22 0.017 +/- 0.002 (A)

(B) 07-Feb-22 0.017 +/- 0.002 (A) 0.015 +/- 0.002 16-Feb-22 0.018 +/- 0.002 (A) 0.011 +/- 0.001 22-Feb-22 0.017 +/- 0.002 (A) 0.018 +/- 0.002 01-Mar-22 0.007 +/- 0.002 (A) 0.005 +/- 0.001 07-Mar-22 0.019 +/- 0.002 (A) 0.015 +/- 0.002 15-Mar-22 0.009 +/- 0.002 (A) 0.006 +/- 0.001 22-Mar-22 0.012 +/- 0.002 (A) 0.016 +/- 0.002 29-Mar-22 0.015 +/- 0.002 (A) 0.018 +/- 0.002 Average 0.016 +/- 0.001 0.017 +/- 0.001 0.013 +/- 0.001 (A) Site power was out for extended period (B) Site power was out for extended period 2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1260 +/- 0.0095

<0.0143

<0.0010

<0.0338 H32 0.1180 +/- 0.0201

<0.0499

<0.0037

<0.0032

<0.1060 H33 0.1570 +/- 0.0131

<0.0270

<0.0018

<0.0014

<0.0233

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 05-Jan-22

<133 295 +/- 24

<4

<3

<7

<4

<8

<6

<4

<3

<4

<4 02-Feb-22

<131 285 +/- 24

<3

<8

<4

<7

<5

<4

<3

<4

<4 02-Mar-22

<135 367 +/- 27

<3

<6

<4

<7

<6

<4

<3

<4 H36 05-Jan-22 96 +/- 43 286 +/- 25

<3

<8

<4

<7

<5

<4

<3

<4 02-Feb-22

<133 312 +/- 25

<4

<3

<7

<4

<8

<6

<4

<3

<5 02-Mar-22

<135 322 +/- 25

<3

<4

<7

<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 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 These samples have not yet been collected H16 H19 H36

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 These samples have not yet been collected H16 H19

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 These samples were not collected H71 H72 H73 H74 H75 H76 H77 H78 H79 (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 28-Jan-22

<45 1630 +/- 79

<6

<7

39 l P a g e B. Second Quarter 2022 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT SECOND QUARTER 2022 BUREAU OF RADIATION CONTROL ST. LUCIE SITE

40 l P a g e Offsite Dose Calculation Manual Sampling Second Quarter, 2022 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

64

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

0 4.b. Broadleaf Vegetation Monthly 3

9 Total: 18 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 - (R/hour)

Sample Site Deployment 15-March-22 Collection 22-June-22 Sample Site Deployment 15-March-22 Collection 22-June-22 N-1 4.00 +/- 0.28 SW-2 3.93 +/- 0.11 NNW-5 3.67 +/- 0.09 SW-5 4.75 +/- 0.09 NNW-10 4.69 +/- 0.38 SW-10 3.99 +/- 0.11 NW-5 3.84 +/- 0.31 SSW-2 3.86 +/- 0.2 NW-10 5.13 +/- 0.33 SSW-5 4.52 +/- 0.19 WNW-2 3.78 +/- 0.28 SSW-10 3.7 +/- 0.32 WNW-5 4.01 +/- 0.5 S-5 3.84 +/- 0.22 WNW-10 3.84 +/- 0.12 S-10 5.13 +/- 0.39 W-2 3.51 +/- 0.22 S/SSE-10 4.47 +/- 0.19 W-5 4.32 +/- 0.46 SSE-5 3.93 +/- 0.32 W-10 3.56 +/- 0.15 SSE-10 4.31 +/- 0.27 WSW-2 4.00 +/- 0.55 SE-1 4.04 +/- 0.13 WSW-5 4.18 +/- 0.22 H-32 4.23 +/- 0.36 WSW-10 4.49 +/- 0.19

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

Collection Date H08 H12 H14 H30 H34 05-Apr-22

<0.02

<0.02 13-Apr-22

<0.02

<0.02 20-Apr-22

<0.02

<0.02 26-Apr-22

<0.02

<0.02 04-May-22

<0.02

<0.02 11-May-22

<0.02

<0.02 17-May-22

<0.02

<0.02 25-May-22

<0.02

<0.02 01-Jun-22

<0.02

<0.02 08-Jun-22

<0.02

<0.02 15-Jun-22

<0.02

<0.02 23-Jun-22

<0.02

<0.02 28-Jun-22

<0.04

<0.03

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

Collection Date H08 H12 H14 H30 H34 05-Apr-22 0.019 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 0.021 +/- 0.002 0.018 +/- 0.002 13-Apr-22 0.015 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.018 +/- 0.002 0.014 +/- 0.002 20-Apr-22 0.010 +/- 0.002 0.009 +/- 0.002 0.012 +/- 0.002 0.008 +/- 0.002 0.011 +/- 0.002 26-Apr-22 0.017 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 0.016 +/- 0.002 0.015 +/- 0.002 04-May-22 0.014 +/- 0.002 0.020 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 11-May-22 0.013 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 0.015 +/- 0.002 0.015 +/- 0.002 17-May-22 0.008 +/- 0.002 0.010 +/- 0.002 0.017 +/- 0.002 0.009 +/- 0.002 0.014 +/- 0.002 25-May-22 0.016 +/- 0.002 0.019 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 0.017 +/- 0.002 01-Jun-22 0.012 +/- 0.002 0.020 +/- 0.002 (A) 0.015 +/- 0.002 0.017 +/- 0.002 08-Jun-22 0.011 +/- 0.002 0.007 +/- 0.002 0.003 +/- 0.001 0.009 +/- 0.002 0.004 +/- 0.001 15-Jun-22 0.019 +/- 0.002 0.020 +/- 0.002 0.021 +/- 0.002 0.020 +/- 0.002 0.013 +/- 0.002 23-Jun-22 0.018 +/- 0.002 0.017 +/- 0.002 0.023 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 28-Jun-22 0.021 +/- 0.003 0.020 +/- 0.003 0.020 +/- 0.003 0.022 +/- 0.003 0.014 +/- 0.002 Average 0.014 +/- 0.001 0.015 +/- 0.001 0.015 +/- 0.001 0.015 +/- 0.001 0.014 +/- 0.001 (A) Sample was missing at time of collection 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 0.126 +/- 0.0088

<0.0109

<0.0009

<0.001

<0.0109 H12 0.122 +/- 0.089

<0.0107

<0.0010

<0.001 0.008 +/- 0.002 H14 0.109 +/- 0.0088

<0.0171

<0.0007

<0.001

<0.0306 H30 0.12 +/- 0.0092

<0.0140

<0.0009

<0.001

<0.0107 H34 0.120 +/- 0.0092

<0.0126

<0.0009

<0.001

<0.0115

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 05-Apr-22

<133 386 +/- 28

<3

<7

<3

<8

<7

<5

<3

<4

<5 14-Apr-22

<137 362 +/- 28

<4

<3

<6

<3

<8

<6

<4

<3

<4

<4 20-Apr-22

<137 340 +/- 27

<4

<3

<7

<4

<7

<6

<4

<4 26-Apr-22

<140 335 +/- 26

<3

<7

<4

<8

<5

<3

<4

<3

<4 04-May-22

<134 319 +/- 25

<3

<6

<3

<8

<6

<4

<3

<4 11-May-22 191 +/- 45 371 +/- 27

<4

<3

<8

<3

<7

<5

<4

<4 17-May-22

<134 338 +/- 26

<4

<7

<4

<8

<6

<4

<3

<4

<4 25-May-22

<133 346 +/- 26

<3

<7

<4

<8

<5

<4

<3

<4 01-Jun-22

<132 318 +/- 26

<3

<6

<4

<7

<5

<4

<3 08-Jun-22

<132 333 +/- 27

<3

<7

<4

<7

<6

<4

<3 16-Jun-22

<132 342 +/- 27

<4

<3

<7

<4

<7

<5

<3

<3 22-Jun-22

<134 340 +/- 26

<3

<4

<6

<4

<8

<5

<4

<3

<4

<3 28-Jun-22 103 +/- 43 363 +/- 28

<3

<8

<4

<8

<6

<4

<4 H59 05-Apr-22

<133 302 +/- 42

<5

<6

<12

<6

<11

<10

<12

<4

<6

<7 02-May-22

<134 320 +/- 36

<5

<6

<11

<5

<12

<10

<8

<5

<6

<11 08-Jun-22

<198 294 +/- 24

<3

<7

<3

<7

<6

<4

<3

<4

<3 (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 25-Jul-22

<92 179 +/-

<8

<6

<8

<7

<334 55 +/- 10

<48 16 +/- 5

<48 H59 25-Jul-22

<65 175 +/-

40

<7

<9

<6

<8

<80

<180

<40

<60 NOTE: Samples collected late due to scheduling error.

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

Sampl e

Si Collectio n Date K-40 Mn Co-58 Fe-59 Co-60 Zn-65 Cs Cs-137 Ra-226 Ra-228 H15 16-Jun-22 1620 +/- 153

<22

<20

<44

<22

<57

<20

<2 784 +/- 164

<116 H59 16-Jun-22 1430 +/- 166

<22

<24

<51

<20

<46

<18

<23

<539

<117 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 These samples previously collected

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 05-Apr-22 1020 +/-

4940 +/-

<18

<13

<15

<930

<32 297 +/- 136

<70 02-May-22 1140 +/-

3550 +/-

<33

<14

<17

<1010

<32

<414

<69 08-Jun-22 953 +/-

3830 +/-

<16

<13 18 +/- 4

<101

<26

<305

<48 H52 05-Apr-22 1930 +/-

3290 +/-

<19

<12

<15 774 +/- 322

<32

<353

<62 02-May-22 1050 +/-

3660 +/-

<24

<12

<14

<931

<26

<330

<51 08-Jun-22 1680 +/-

3850 +/-

<35

<17

<20

<7860

<43

<542

<65 H59 05-Apr-22 1010 +/-

1970 +/-

<11

<10

<12

<113

<21

<218

<37 02-May-22 1110 +/-

2370 +/-

<19

<10

<11

<120

<20

<228

<38 08-Jun-22 1070 +/-

3130 +/-

<17

<10

<12

<90

<21

<249

<39

47 l P a g e ST. LUCIE SITE Supplemental Sampling Second Quarter, 2022 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

26 2.b. Air Particulates Weekly 3

26

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: 77 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 - (R/hour)

Sample Site Deployment 15-Mar-22 Collection 22-June-22 H08 4.48 +/- 0.15 H09 4.6 +/- 0.49 H12 9.44 +/- 0.23 H14 4.69 +/- 0.46 H33 4.36 +/- 0.24 H34 4.25 +/- 0.11 H60 4.34 +/- 0.17 H61 5.79 +/- 0.22 H62 4.89 +/- 0.31 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 05-Apr-22

<0.02 (A)

<0.02 13-Apr-22

<0.02 (A)

<0.02 20-Apr-22

<0.02 (A)

<0.02 26-Apr-22

<0.02 (A)

<0.02 04-May-22

<0.02 (A)

<0.02 11-May-22

<0.02 (A)

<0.02 17-May-22

<0.02 (A)

<0.02 25-May-22

<0.02 (A)

<0.02 01-Jun-22

<0.02 (A)

<0.02 08-Jun-22

<0.02 (A)

<0.02 15-Jun-22

<0.02 (A)

<0.02 22-Jun-22

<0.02 (A)

<0.02 28-Jun-22

<0.03 (A)

<0.03 (A) Site power was out for an extended period.

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

Collection Date H09 H32 H33 05-Apr-22 0.013 +/- 0.002 (A) 0.013 +/- 0.002 13-Apr-22 0.014 +/- 0.002 (A) 0.016 +/- 0.002 20-Apr-22 0.009 +/- 0.002 (A) 0.012 +/- 0.002 26-Apr-22 0.019 +/- 0.002 (A) 0.018 +/- 0.002 04-May-22 0.017 +/- 0.002 (A) 0.013 +/- 0.002 11-May-22 0.018 +/- 0.002 (A) 0.014 +/- 0.002 17-May-22 0.011 +/- 0.002 (A) 0.012 +/- 0.002 25-May-22 0.017 +/- 0.002 (A) 0.016 +/- 0.002 01-Jun-22 0.014 +/- 0.002 (A) 0.011 +/- 0.002 08-Jun-22 0.004 +/- 0.001 (A) 0.009 +/- 0.002 15-Jun-22 0.019 +/- 0.002 (A) 0.017 +/- 0.002 22-Jun-22 0.021 +/- 0.002 (A) 0.020 +/- 0.002 28-Jun-22 0.009 +/- 0.002 (A) 0.016 +/- 0.002 Average 0.014 +/- 0.001 (A) 0.014 +/- 0.001 (A) Site power was out for an extended period.

2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES -

(pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1130 +/- 0.0090

<0.0134

<0.0008

<0.0009

<0.0009 H32 Site power was out for an extended period.

H33 0.1140 +/- 0.0096

<0.0139

<0.0008

<0.0008 0.0382 +/- 0.0109

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 05-Apr-22

<132 381 +/- 44

<5

<12

<5

<12

<11

<10

<4

<6

<7 02-May-22

<134 325 +/- 35

<5

<11

<6

<14

<9

<8

<5

<21 08-Jun-22

<198 197 +/- 19

<3

<7

<3

<7

<5

<3

<3 H36 05-Apr-22

<132 297 +/- 24

<3

<8

<4

<8

<7

<4

<5 02-May-22

<134 288 +/- 23

<4

<3

<6

<4

<8

<6

<4

<3

<4

<5 08-Jun-22

<198 297 +/- 24

<3

<8

<4

<7

<4

<3

<4

<3 2.

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

3.

- 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 These samples have not yet been collected.

H16 H19 H36

51 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 These samples have not yet been collected.

H16 H19

52 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-22 94 +/- 45

<67

<4

<8

<4

<9

<7

<5

<4

<5

<8 H71 07-Jun-22 413 +/- 50 380 +/- 34

<5

<4

<8

<4

<9

<7

<5

<4

<5

<8 H72 07-Jun-22

<134 296 +/- 25

<4

<7

<4

<10

<7

<5

<4

<4 H73 07-Jun-22

<134 81 +/- 14

<4

<7

<4

<8

<7

<4

<4 H74 07-Jun-22

<134 315 +/- 25

<3

<4

<7

<4

<10

<6

<4

<4 H75 07-Jun-22

<134 235 +/- 22

<3

<4

<7

<4

<10

<6

<4

<4 H76 07-Jun-22

<134

<45

<4

<7

<4

<9

<7

<5

<4

<8 H77 07-Jun-22

<134

<67

<4

<7

<4

<8

<7

<4

<10 H78 07-Jun-22

<139 56 +/- 13

<5

<4

<8

<4

<9

<7

<5

<4

<8 H79 07-Jun-22

<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.

5 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.

5 l P a g e C. Third Quarter 2022 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT THIRD QUARTER 2022 BUREAU OF RADIATION CONTROL ST. LUCIE SITE

5 l P a g e Offsite Dose Calculation Manual Sampling Third Quarter, 2022 Sample Type Collection Frequency Number of Sample Locations Number of Samples

1. Direct Radiation Quarterly 27 27

4. Airborne 4.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 0

0

4. Ingestion 4.a. Fish and Invertebrates 4.a.1. Crustacea Semiannually 1

1 4.a.2. Fish Semiannually 0

0 4.b. Broadleaf Vegetation Monthly 3

9 Total: 183 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.

5 l P a g e

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

Sample Site Deployment 22-June-22 Collection 20-Sep-22 N-1 3.57 +/- 0.2 NNW-5 3.6 +/- 0.5 NNW-10 4.36 +/- 0.23 NW-5 3.49 +/- 0.21 NW-10 4.62 +/- 0.02 WNW-2 3.66 +/- 0.36 WNW-5 3.73 +/- 0.36 WNW-10 3.57 +/- 0.34 W-2 3.51 +/- 44 W-5 4.12 +/- 0.26 W-10 3.16 +/- 0.26 WSW-2 3.71 +/- 0.05 WSW-5 3.83 +/- 0.38 WSW-10 4.08 +/- 0.43 SW-2 3.5 +/- 0.47 SW-5 4.32 +/- 0.36 SW-10 3.56 +/- 0.46 SSW-2 3.5 +/- 0.32 SSW-5 4.18 +/- 0.68 SSW-10 3.32 +/- 0.54 S-5 3.41 +/- 0.29 S-10 4.05 +/- 0.57 S/SSE-10 3.96 +/- 0.21 SSE-5 3.5 +/- 0.31 SSE-10 3.93 +/- 0.26 SE-1 3.3 +/- 0.06 H-32 4.03 +/- 0.39

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

Collection Date H08 H12 H14 H30 H34 06-Jul-22

<0.02

<0.02 12-Jul-22

<0.03

<0.03 18-Jul-22

<0.03

<0.03 26-Jul-22

<0.02

<0.02 02-Aug-22

<0.02

<0.02 09-Aug-22

<0.02

<0.02 16-Aug-22

<0.02

<0.02 22-Aug-22

<0.03

<0.03 30-Aug-22

<0.03

<0.03 07-Sep-22

<0.01

<0.01 13-Sep-22

<0.03

<0.03 20-Sep-22

<0.02

<0.02 27-Sep-22

<0.03

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

Collection Date H08 H12 H14 H30 H34 06-Jul-22 0.007 +/- 0.001 0.005 +/- 0.001 0.010 +/- 0.002 0.008 +/- 0.001 0.007 +/- 0.001 12-Jul-22 0.012 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 0.009 +/- 0.002 0.009 +/- 0.002 18-Jul-22 0.010 +/- 0.002 0.010 +/- 0.002 0.010 +/- 0.002 0.006 +/- 0.002 0.009 +/- 0.002 26-Jul-22 0.015 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 0.014 +/- 0.002 0.013 +/- 0.002 02-Aug-22 0.011 +/- 0.002 0.019 +/- 0.002 0.016 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.002 09-Aug-22 0.014 +/- 0.002 0.019 +/- 0.002 0.016 +/- 0.002 0.012 +/- 0.002 0.016 +/- 0.002 16-Aug-22 0.021 +/- 0.002 0.018 +/- 0.002 0.019 +/- 0.002 0.023 +/- 0.002 0.023 +/- 0.002 22-Aug-22 0.002 +/- 0.001 0.016 +/- 0.002 0.021 +/- 0.002 0.019 +/-.002 0.018 +/- 0.002 30-Aug-22 0.011 +/- 0.002 0.007 +/- 0.001 0.009 +/- 0.001 0.007 +/- 0.001 0.007 +/- 0.001 07-Sep-22 0.008 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 0.011 +/- 0.002 0.010 +/- 0.002 13-Sep-22 0.008 +/- 0.002 0.011 +/- 0.002 0.009 +/- 0.002 0.010 +/- 0.002 0.006 +/- 0.002 20-Sep-22 0.004 +/- 0.001 0.006 +/- 0.001 0.007 +/- 0.002 0.006 +/- 0.001 0.007 +/- 0.002 27-Sep-22 0.013 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 0.016 +/- 0.002 0.014 +/- 0.002 Average 0.010 +/- 0.001 0.012 +/- 0.001 0.012 +/- 0.001 0.012 +/- 0.001 0.012 +/- 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 0.0728 +/- 0.0067

<0.0116

<0.0104

<0.0009

<0.0093 H12 0.0982 +/- 0.0075

<0.0096

<0.0137

<0.0009

<0.0098 H14 0.0830 +/- 0.0071

<0.0097

<0.0139

<0.0007

<0.0303 H30 0.0789 +/- 0.0070

<0.0102

<0.0151

<0.0007

<0.0298 H34 0.0796 +/- 0.0074

<0.0132

<0.0142

<0.0006

<0.0278

5 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-Jul-22

<135 358 +/- 28

<4

<8

<3

<9

<8

<6

<4

<3

<4 12-Jul-22

<135 322 +/- 26

<3

<4

<7

<3

<7

<6

<4

<3

<4

<3 18-Jul-22

<132 350 +/- 27

<3

<7

<4

<8

<6

<5

<3

<3 26-Jul-22

<137 312 +/- 26

<3

<6

<3

<7

<6

<4

<3

<3 02-Aug-22

<136 312 +/- 25

<4

<3

<7

<4

<6

<4

<3

<4

<3 09-Aug-22

<136 365 +/- 40

<5

<9

<7

<14

<11

<6

<5

<12

<3 16-Aug-22

<136 245 +/- 23

<3

<7

<4

<7

<6

<4

<3

<4

<3 22-Aug-22

<133 311 +/- 25

<3

<7

<4

<8

<6

<4

<3 30-Aug-22

<133 294 +/- 24

<3

<6

<4

<8

<6

<4

<3

<4

<4 07-Sep-22

<136 362 +/- 28

<4

<9

<4

<8

<7

<6

<4

<3 13-Sep-22

<136 305 +/- 26

<3

<7

<4

<7

<5

<4

<3

<2 20-Sep-22

<136 319 +/- 26

<3

<7

<4

<8

<6

<4

<3

<9 27-Sep-22

<136 338 +/- 36

<6

<11

<6

<10

<1

<8

<5

<6

<7 H59 06-Jul-22

<135 336 +/- 37

<5

<12

<3

<15

<9

<5

<12 09-Aug-22

<136 365 +/- 40

<6

<5

<9

<7

<14

<11

<6

<5

<3 01-Sep-22

<133 361+/-27

<3

<7

<4

<6

<5

<4

<3

<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.

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 01-Sep-22

<94 412 +/- 46

<9

<11

<1130 110 +/- 13

<75

<22

<233 H59 01-Sep-22

<87 287 +/- 40

<8

<6

<8

<9

<936 41 +/- 11

<65 15 +/- 5

<169 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 14-Jul-22 1250 +/- 115

<14

<16

<33

<19

<36

<16

<18

<408

<64 H59 Sample to be 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 These samples to be collected

6 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 06-Jul-22 1090 +/- 51 3200 +/- 139

<16

<8

<10 62 +/- 18

<17

<205

<38 09-Aug-22 1920 +/- 107 2280 +/- 144

<14

<11

<13

<984

<29

<341

<57 01-Sep-22 984 +/- 68 5600 +/- 240

<12

<11

<13

<796

<18

<307

<58 H52 06-Jul-22 758 +/- 66 3980 +/- 198

<25

<12

<12 481 +/- 317

<27

<341

<60 09-Aug-22 1590 +/- 65 5530 +/- 213

<12

<10

<13

<90

<22

<238

<41 01-Sep-22 1180 +/- 53 4380 +/- 174

<10

<9

<10 68 +/- 18

<19

<210

<36 H59 06-Jul-22 595 +/- 40 3270 +/- 147

<20

<9

<12

<83

<20

<234

<36 09-Aug-22 925 +/- 50 2960 +/- 135

<11

<9

<12

<80

<19

<207

<38 01-Sep-22 739 +/- 64 3390 +/- 179

<15

<11

<17 1070 +/- 295

<32

<315

<64

6 l P a g e ST. LUCIE SITE Supplemental Sampling Third Quarter, 2022 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 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 0

0 4.b. Citrus Annually 0

0 Total: 77 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.

6 l P a g e

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

Sample Site Deployment 22-June-22 Collection 20-Sep-22 H08 4.03 +/- 0.39 H09 4.04 +/- 0.40 H12 7.95 +/- 0.57 H14 4.07 +/- 0.42 H33 3.87 +/- 0.05 H34 3.76 +/- 0.50 H60 3.6 +/- 0.25 H61 3.8 +/- 0.05 H62 4.91 +/- 0.39 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

(A) Site power was out for an extended period.

Collection Date H09 H32 H33 06-Jul-22

<0.02 (A)

<0.02 12-Jul-22

<0.03 (A)

<0.03 18-Jul-22

<0.03 (A)

<0.03 26-Jul-22

<0.02 (A)

<0.02 02-Aug-22

<0.02 (A)

<0.02 09-Aug-22

<0.02

<0.02 16-Aug-22

<0.02

<0.02 22-Aug-22

<0.03

<0.03 30-Aug-22

<0.03

<0.03 07-Sep-22

<0.01

<0.01 13-Sep-22

<0.03

<0.03 20-Sep-22

<0.02

<0.02 27-Sep-22

<0.03

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

Collection Date H09 H32 H33 06-Jul-22 0.004 +/- 0.001 (A) 0.010 +/- 0.002 12-Jul-22 0.010 +/- 0.002 (A) 0.008 +/- 0.002 18-Jul-22 0.011 +/- 0.002 (A) 0.011 +/- 0.002 26-Jul-22 0.015 +/- 0.002 (A) 0.015 +/- 0.002 02-Aug-22 0.015 +/- 0.002 (A) 0.010 +/-0.002 09-Aug-22 0.020 +/- 0.002 0.013 +/- 0.002 0.014 +/- 0.002 16-Aug-22 0.020 +/- 0.002 0.020 +/- 0.002 0.011 +/- 0.002 22-Aug-22 0.018 +/- 0.002 0.017 +/- 0.002 0.016 +/- 0.002 30-Aug-22 0.007 +/- 0.001 0.003 +/- 0.001 0.005 +/- 0.001 07-Sep-22 0.009 +/- 0.002 0.010 +/- 0.002 0.010 +/- 0.002 13-Sep-22 0.009 +/- 0.002 0.007 +/- 0.002 0.010 +/- 0.002 20-Sep-22 0.007 +/- 0.002 0.006 +/- 0.001 0.011 +/- 0.002 27-Sep-22 0.014 +/- 0.002 0.019 +/- 0.002 0.015 +/- 0.002 Average 0.012 +/- 0.001 0.012 +/- 0.001 0.011 +/- 0.001 (A) Site power was out for an extended period.

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

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.0864 +/- 0.0076

<0.0123

<0.0159

<0.0007

<0.0351 H32 Site power was out for an extended period.

H33 0.0757 +/- 0.0072

<0.0137

<0.0111

<0.0009

<0.0093

6l 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 06-Jul-22

<135 306 +/- 35

<6

<5

<11

<5

<14

<10

<8

<5

<8 09-Aug-22

<136 356 +/- 37

<5

<11

<6

<11

<8

<7

<5

<13 01-Sep-22

<133 339 +/- 27

<3

<4

<7

<4

<8

<6

<5

<3

<3 H36 06-Jul-22

<135 367 +/- 27

<3

<4

<8

<4

<8

<6

<3

<3 09-Aug-22

<136 317 +/- 27

<4

<8

<4

<7

<6

<5

<4

<3 01-Sep-22

<133 400 +/- 38

<6

<5 12

<6

<11

<9

<5

<6

<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.

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 01-Sep-22 53 +/- 13 666 +/- 44

<6

<7

<8

<393

<254

<52

<16

<122 H16 01-Sep-22

<75 474 +/- 56

<10

<9

<10

<1096

<341

<69

<22

<205 H19 01-Sep-22

<93 445 +/- 51

<10

<9

<11

<836

<327

<69

<21

<211 H36 13-Sep-22

<126 7860 +/- 272

<15

<11

<18

<16 5280 +/- 398

<552

<96

<35

<324

6 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 01-Sep-22

<88 282 +/- 39

<78

<8

<9

<1010 325 +/- 98

<68 20 +/- 6

<198 H16 01-Sep-22

<81 203 +/- 33

<69

<9

<7

<10

<1090 411 +/- 95

<60 26 +/- 6

<173 H19 01-Sep-22

<98

<157

<10

<11

<10

<11

<916 225 +/- 122 63 +/- 24 16 +/- 8

<203

6 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 14-Jul-22

<132

<82

<5

<12

<6

<12

<9

<7

<5

<19 H71 14-Jul-22

<135 313 +/- 36

<6

<13

<7

<14

<10

<7

<6

<17 H72 14-Jul-22

<135 77 +/- 13

<3

<7

<8

<6

<4

<3 H73 14-Jul-22

<135 318 +/- 38

<5

<10

<6

<11

<10

<6

<5

<17 H74 14-Jul-22

<135 212 +/- 21

<4

<3

<6

<4

<8

<6

<4

<3 H75 14-Jul-22

<135

<86

<5

<6

<11

<5

<11

<10

<8

<5

<6

<10 H76 14-Jul-22

<135

<37

<3

<4

<7

<3

<8

<6

<5

<3

<3 H77 14-Jul-22

<132

<81

<5

<9

<4

<12

<9

<5

<7 H78 14-Jul-22

<132

<63

<5

<4

<10

<5

<11

<9

<4

<6

<8 H79 14-Jul-22

<132

<82

<5

<12

<6

<12

<9

<7

<5

<19 (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.

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

Sample Site Collection Date Be-7 K-40 I-<13<1 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-<13<1 Cs-<134 Cs-

<137 H23 This sample was previously collected.

6 l P a g e D. Fourth Quarter 2022 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FOURTH QUARTER 2022 BUREAU OF RADIATION CONTROL

l P a g e ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Fourth Quarter, 2022 Sample Type Collection Frequency Number of Sample Locations Number of Samples

1. Direct Radiation Quarterly 27 26

2. Airborne 2.a. Air Iodines Weekly 5

60 2.b. Air Particulates Weekly 5

60

3. Waterborne 3.a. Surface Water Weekly 1

12 Monthly 1

3 3.b. Shoreline Sediment Semiannually 0

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: 177 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.

7 l P a g e

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

(A)Missing at time of collection Sample Site Deployment 20-Sep-22 Collection 21-Dec-22 N-1 3.5 +/- 0.3 NNW-5 (A)

NNW-10 4.2 +/- 0.4 NW-5 3.6 +/- 0.3 NW-10 4.9 +/- 0.3 WNW-2 3.6 +/- 0.1 WNW-5 3.8 +/- 0.1 WNW-10 3.5 +/- 0.2 W-2 3.4 +/- 0.2 W-5 4.1 +/- 0.2 W-10 3.2 +/- 0.2 WSW-2 3.8 +/- 0.1 WSW-5 3.9 +/- 0.1 WSW-10 4.3 +/- 0.4 SW-2 3.5 +/- 0.2 SW-5 4.3 +/- 0.1 SW-10 3.7 +/- 0.2 SSW-2 3.6 +/- 0.3 SSW-5 4.1 +/- 0.2 SSW-10 3.5 +/- 0.2 S-5 3.4 +/- 0.3 S-10 4.1 +/- 0.1 S/SSE-10 4.0 +/- 0.2 SSE-5 3.8 +/- 0.3 SSE-10 3.7 +/- 0.3 SE-1 3.4 +/- 0.2 H-32 4.1 +/- 0.2

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

Collection Date H08 H12 H14 H30 H34 04-Oct-22

<0.02

<0.02 11-Oct-22

<0.03

<0.03 18-Oct-22

<0.02

<0.02 24-Oct-22

<0.03

<0.03 02-Nov-22

<0.02

<0.02 08-Nov-22

<0.02

<0.02 14-Nov-22

<0.02

<0.01

<0.02 22-Nov-22

<0.01

<0.01 30-Nov-22

<0.01

<0.01 07-Dec-22

<0.01

<0.01 13-Dec-22

<0.02

<0.02 22-Dec-22

<0.02

<0.01

<0.01 28-Dec-22

<0.02

<0.01

<0.02

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

Collection Date H08 H12 H14 H30 H34 04-Oct-22 0.010 +/- 0.002 0.007 +/- 0.002 0.009 +/- 0.001 0.008 +/- 0.002 0.011 +/- 0.002 11-Oct-22 0.013 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 0.014 +/- 0.002 0.010 +/- 0.002 18-Oct-22 0.015 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 0.016 +/- 0.002 0.010 +/- 0.002 24-Oct-22 0.015 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 0.013 +/- 0.002 0.016 +/- 0.002 02-Nov-22 0.013 +/- 0.002 0.011 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.001 08-Nov-22 0.008 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 0.014 +/- 0.002 0.013 +/- 0.002 14-Nov-22 0.011 +/- 0.002 0.030 +/- 0.003 0.011 +/- 0.002 0.009 +/- 0.002 0.008 +/- 0.002 22-Nov-22 0.008 +/- 0.002 0.004 +/- 0.001 0.008 +/- 0.002 0.007 +/- 0.001 0.006 +/- 0.001 30-Nov-22 0.012 +/- 0.002 0.013 +/- 0.002 0.010 +/- 0.002 0.016 +/- 0.002 0.014 +/- 0.002 07-Dec-22 0.016 +/- 0.002 0.023 +/- 0.002 0.019 +/- 0.002 0.013 +/- 0.002 0.012 +/- 0.002 13-Dec-22 0.017 +/- 0.002 0.019 +/- 0.002 0.012 +/- 0.002 0.015 +/- 0.002 0.013 +/- 0.002 22-Dec-22 0.016 +/- 0.002 0.021 +/- 0.002 0.019 +/- 0.002 0.014 +/- 0.002 0.014 +/- 0.002 28-Dec-22 0.014 +/- 0.002 0.013 +/- 0.002 0.019 +/- 0.002 0.001 +/- 0.001 0.026 +/- 0.003 Average 0.013 +/- 0.001 0.016 +/- 0.001 0.014 +/- 0.001 0.012 +/- 0.001 0.013 +/- 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 0.1230 +/- 0.0098

<0.0112

<0.0009

<0.0011

<0.0010 H12 0.1310 +/- 0.0102

<0.0144

<0.0007

<0.0008

<0.0008 H14 0.1300 +/- 0.0107

<0.0217

<0.0009

<0.0011

<0.0010 H30 0.1290 +/- 0.0098

<0.0146

<0.0008

<0.0010

<0.0008 H34 0.1490 +/- 0.0107

<0.0231

<0.0010

<0.0012

<0.0011

7 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 04-Oct-22

<130 318 +/- 26

<3

<7

<4

<8

<6

<4

<3

<4

<3 11-Oct-22

<129 331 +/- 26

<4

<3

<7

<3

<7

<6

<4

<3

<3 18-Oct-22

<129 332 +/- 25

<3

<7

<4

<7

<6

<4

<3

<4

<3 24-Oct-22

<130 309 +/- 25

<4

<3

<8

<4

<7

<5

<3

<4

<3 08-Nov-22

<134 310 +/- 36

<5

<13

<5

<11

<8

<11

<4

<5

<8 14-Nov-22

<133 310 +/- 26

<3

<6

<3

<6

<5

<4

<3

<4

<3 22-Nov-22

<129 331+/- 27

<3

<4

<8

<3

<8

<6

<3

<4

<4 30-Nov-22

<133 318 +/- 25

<3

<4

<7

<3

<8

<5

<4

<3

<3 07-Dec-22

<128 292 +/- 25

<3

<8

<3

<8

<6

<4

<3 13-Dec-22

<134 397 +/- 27

<3

<7

<4

<8

<6

<4

<3

<4

<3 22-Dec-22

<134 320 +/- 26

<3

<4

<7

<4

<8

<6

<3

<4

<4 28-Dec-22

<134 367 +/- 27

<3

<4

<7

<4

<7

<5

<4

<3

<3 H59 04-Oct-22

<131 273 +/- 24

<3

<7

<3

<7

<6

<4

<3 02-Nov-22

<129 381 +/- 40

<6

<5

<13

<6

<11

<10

<6

<4

<6

<10 07-Dec-22

<134 417 +/- 32

<4

<3

<8

<4

<8

<6

<5

<3

<4

<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.

7 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 H59 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 11-Oct-22 3420 +/-

<20

<23

<41

<22

<41

<21

<23

<457

<87 H59 29-Nov-22 2090 +/-

<218

<23

<18

<45

<28

<51

<21

<498

<129 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 20-Oct-22 4750 +/- 280

<26

<28

<61

<23

<65

<29

<63

<122 H59 14-Dec-22 2900 +/- 207

<20

<23

<45

<26

<52

<21

<23

<371

<98

7 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 04-Oct-22 1660 +/- 103 4560 +/- 226

<17

<13

<16

<976

<28

<334

<70 02-Nov-22 2790 +/- 243 2710 +/- 139

<32

<9

<15

<699

<21

<248

<44 07-Dec-22 1120 +/- 109 4080 +/- 195

<13

<12

<726

<24

<257

<50 H52 04-Oct-22 1110 +/- 73 4060 +/- 196

<14

<10

<14

<830 19 +/- 7

<311

<52 02-Nov-22 1630 +/- 106 3210 +/- 181

<44

<11

<13 1260 +/- 369

<30

<376

<53 07-Dec-22 1010 +/- 68 3090 +/- 164

<13

<12

<709 21 +/- 7

<307

<53 H59 04-Oct-22 933 +/- 70 3390 +/- 186

<16

<11

<15

<834

<30

<334

<54 02-Nov-22 978 +/- 96 2210 +/- 123

<30

<9

<10

<704

<19

<206

<37 07-Dec-22 1050 +/- 47 3330 +/- 139

<9

<7

<9

<69

<18

<187

<33

7 l P a g e ST. LUCIE SITE Supplemental Sampling Fourth Quarter, 2022 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 0

0 3.c. Beach Sand Semiannually 0

0 3.d. Ground Water Quarterly 10 10

4. Ingestion 4.a. Garden Crop Annually 0

0 4.b. Citrus Annually 0

0 Total: 77 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.

7 l P a g e

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

Sample Site Deployment 20-Sep-22 Collection 21-Dec-22 H08 4.10 +/- 0.19 H09 4.04 +/- 0.31 H12 8.02 +/- 0.27 H14 4.10 +/- 0.19 H33 3.88 +/- 0.59 H34 3.58 +/- 0.27 H60 3.67 +/- 0.39 H61 4.93 +/- 0.10 H62 4.43 +/- 0.31 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 04-Oct-22

<0.02

<0.02 11-Oct-22

<0.03

<0.48 (B) 18-Oct-22

<0.02

<0.02 (A) 24-Oct-22

<0.03

<0.03 (A) 02-Nov-22

<0.02

<0.02 (A) 08-Nov-22

<0.02

<0.02 (A) 14-Nov-22

<0.02

<0.02 22-Nov-22

<0.01

<0.01 (A) 30-Nov-22

<0.01

<0.01 07-Dec-22

<0.01

<0.01 13-Dec-22

<0.02

<0.02 21-Dec-22

<0.02

<0.01 28-Dec-22

<0.01

<0.03

<0.02 (A)Site power was out for an extended period.

(B)Measurement due to low volume from power being out

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

Collection Date H09 H32 H33 04-Oct-22 0.011 +/- 0.002 0.012 +/- 0.002 0.011 +/- 0.002 11-Oct-22 0.007 +/- 0.002 0.013 +/- 0.002

<0.020 (B) 18-Oct-22 0.015 +/- 0.002 0.014 +/- 0.002 (A) 24-Oct-22 0.014 +/- 0.002 0.020 +/- 0.002 (A) 02-Nov-22 0.011 +/- 0.002 0.017 +/- 0.002 (A) 08-Nov-22 0.014 +/- 0.002 0.009 +/- 0.002 (A) 14-Nov-22 0.009 +/- 0.002 0.007 +/- 0.002 0.007 +/- 0.002 22-Nov-22 0.007 +/- 0.002 0.006 +/- 0.001 (A) 30-Nov-22 0.015 +/- 0.002 0.017 +/- 0.002 0.003 +/- 0.001 07-Dec-22 0.016 +/- 0.002 0.025 +/- 0.002 0.013 +/- 0.002 13-Dec-22 0.017 +/- 0.002 0.019 +/- 0.002 0.015 +/- 0.002 21-Dec-22 0.018 +/- 0.002 0.021 +/- 0.002 0.009 +/- 0.001 28-Dec-22 0.013 +/- 0.002 0.035 +/- 0.004 0.019 +/- 0.003 Average 0.013 +/- 0.001 0.017 +/- 0.001 0.010 +/- 0.001 (A)Site power was out for an extended period.

(B)Measurement due to low volume from power being out 2.b. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1350 +/- 0.0101

<0.0150

<0.0190

<0.0009

<0.0009 H32 0.1480 +/- 0.0106

<0.0163

<0.0208

<0.0009

<0.0010 H33 0.1230 +/- 0.0125

<0.0184

<0.0273

<0.0014

<0.0012

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 04-Oct-22

<131 285 +/- 25

<3

<7

<3

<7

<5

<4

<3

<4

<3 02-Nov-22

<134 237 +/- 23

<3

<6

<4

<7

<5

<4

<3

<3 07-Dec-22

<134 274 +/- 24

<4

<3

<6

<4

<9

<6

<4

<3

<3 H36 04-Oct-22

<131 253 +/- 24

<3

<7

<3

<7

<6

<4

<2 02-Nov-22 86 +/- 41 324 +/- 27

<4

<7

<4

<8

<6

<4

<3 07-Dec-22

<128 300 +/- 25

<4

<3

<8

<3

<8

<6

<4

<3

<3 (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 H16 These Samples Previously Collected H19 H36

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

Sampl e

Site Collectio n Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 H16 These Samples Previously Collected H19

8 l P a g e 3.e.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) 70 27-Oct-22

<134

<54

<3

<6

<4

<8

<6

<4

<3 71 27-Oct-22 436 +/- 50 315 +/- 27

<4

<8

<4

<9

<7

<6

<4

<4 72 27-Oct-22

<134 339 +/- 36

<5

<6

<10

<7

<12

<10

<9

<4

<6

<10 73 27-Oct-22

<129

<64

<3

<7

<3

<8

<7

<6

<3

<3 74 27-Oct-22

<129 309 +/- 38

<7

<5

<12

<7

<12

<11

<5

<6

<11 75 27-Oct-22

<129 251 +/- 23

<3

<4

<7

<3

<8

<6

<4

<3 76 27-Oct-22

<129

<64

<4

<5

<10

<5

<9

<10

<5

<8 77 27-Oct-22

<129

<40

<3

<4

<5

<3

<8

<5

<6

<4

<3

<6 78 27-Oct-22

<134

<96

<7

<8

<13

<6

<13

<17

<21

<8

<10

<11 79 27-Oct-22

<134

<67

<5

<6

<11

<5

<10

<9

<5

<6

<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.

8 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 was previously collected.

8 l P a g e 10.

Results from the BRC Interlaboratory Comparison Program - 2022 DOE MAPEP Series 47 and ERA RAD-131 BRC Results Matrix: Air Filter (Bq/sample)

Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range Mn-54 2.029 1.880 A

1.32 - 2.44 Co-60 1.954 1.99 A

1.39 - 2.59 Zn-65 1.872 1.580 A

1.11 - 2.05 Cs-134 0.045 A

False Positive Cs-137 1.593 1.53 A

1.07 - 1.99 Gross Alpha 1.11 0.9 A

0.27 - 1.53 Gross Beta 1.22 1.31 A

0.66 - 1.97 Matrix: Soil (Bq/kg)

Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range K-40 534.14 537 A

376 - 698 Mn-54 828.11 841 A

589 - 1093 Co-60 0.15 A

False Positive Zn-65 1156.63 1140 A

798 - 1482 Cs-134 641.82 627 A

439 - 815 Cs-137 1.14 A

False Positive U-238 141.16 157 A

110 - 204 Matrix: Water (Bq/L)

Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range H-3 (pCi/L) 15317 15100 A

13200 - 16600 K-40 1.378 A

False Positive Mn-54 0.198 A

False Positive Co-60 16.46 17 A

11.9 - 22.1 Zn-65 11.824 11.3 A

7.9 - 14.7 Cs-134 16.178 17.1 A

12.0 - 22.2 Cs-137 16.710 16.8 A

11.8 - 21.8 Ra-226 19.760 19 A

14.1 - 21.7 Flag (Evaluation): A = Acceptable, W = Acceptable with Warning, N = Not Acceptable

8 l P a g e DOE MAPEP Series 47 and ERA RAD-131 BRC Results Matrix: Vegetation (Bq/sample)

Radionuclide Result Ref. Value Flag (Evaluation)

Acceptance Range Am-241 0.245 0.189 W

0.132 - 0.246 Mn-54 2.613 2.43 A

1.70 - 3.16 Co-60 4.776 4.620 A

3.23 - 6.01 Zn-65 8.217 7.49 A

5.24 - 9.74 Cs-134

-0.005 A

False Positive Cs-137 1.189 1.083 A

0.758 - 1.408 U-238 0.155 0.13 A

0.091 - 0.169 Flag (Evaluation): A = Acceptable, W = Acceptable with Warning, N = Not Acceptable

L-2023-041, Annual Radiological Environmental Operating Report for Calendar Year 2022

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L-2023-041, Annual Radiological Environmental Operating Report for Calendar Year 2022

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