L-2019-094, Submittal of Annual Radiological Environmental Operating Report for Calendar Year 2018

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Submittal of Annual Radiological Environmental Operating Report for Calendar Year 2018
ML19112A040
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 04/22/2019
From: Snyder M
Florida Power & Light Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2019-094
Download: ML19112A040 (94)


Text

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APR 2 2 2019 L-2019-094 10 CFR 50.4 10 CFR 50.36 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 RE: St. Lucie Units 1 and 2 Docket. Nos. 50-335 and 50-389 Annual Radiological Environmental Operating Report for Calendar Year 2018 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 2018.

Please contact me at (772) 467-7036 should there be any questions regarding this report.

Sincerely,

/!f~rj-Y~

Michael J. Snyder Licensing Manager St. Lucie Plant

Enclosure:

2018 Annual Radiological Environmental Operating Report (93 pages)

MJS/rcs cc: USNRC Senior Resident Inspector, St. Lucie Units 1 and 2 Florida Power & Ught Company 6501 S. Ooean Drive, Jensen Beach, FL 34957

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT UNITS 1 & 2 LICENSE NOS. DPR-67, NPFw16 DOCKET NOS. 50-335, 50-389

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 TABLE OF CONTENTS DESCRIPTION PAGE Introduction 1 Radiological Environmental Monitoring Program 1 Discussion and Interpretation of Results 3 Environmental Radiological Monitoring Program Annual Summary TABLE 1 Deviations / Missing Data TABLE 1A Analyses with LLDs Above Required Detection Capabilities TABLE 1B Land Use Census TABLE 2 Key to Sample Locations ATTACHMENT A Radiological Surveillance of Florida Power and Light Companys St. Lucie Site ATTACHMENT B First Quarter 2018 Second Quarter 2018 Third Quarter 2018 Fourth Quarter 2018 Results from the Interlaboratory Comparison Program 2018 ATTACHMENT C Ground Water Protection, Industry Initiative ATTACHMENT D

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 I. 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 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.

II. RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM A. Purpose The purpose of the radiological environmental monitoring program 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 radiological effluent monitoring program by verifying that the measurable concentrations of radioactive materials and levels of radiation are not higher than expected on the basis of the effluent measurements and the modeling of the environmental exposure pathways.

B. Program Description The radiological environmental monitoring program (REMP) for the St. Lucie Plant (PSL) is conducted pursuant to the St. Lucie Units 1 and 2 Offsite Dose Calculation Manual (ODCM)

Section 3/4.12.1, Monitoring Program.

1. Sample Locations, Types and Frequencies:
a. Direct radiation gamma exposure rate is monitored continuously at 27 locations by thermoluminescent dosimeters (TLDs). TLDs are collected and analyzed quarterly.
b. Airborne radioiodine and particulate samplers are operated continuously at five locations. Samples are collected and analyzed weekly. Analyses include Iodine-131, gross beta, and gamma isotopic measurements.
c. Surface water samples are collected from two locations. Samples are collected and analyzed weekly and monthly, respectively. Analyses include gamma isotopic and tritium measurements.
d. Shoreline sediment samples are collected from two locations coinciding with the locations for surface water samples. Samples are collected and analyzed semi-annually. Sediment samples are analyzed by gamma isotopic measurements.
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.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2

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.

Attachment A provides specific information pertaining to sample locations, types and frequencies.

Note: Ground Water Protection, NEI Initiative: The program and results are described in Attachment D

2. Analytical Responsibility:

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

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

C. Analytical Results Table 1, Environmental Radiological Monitoring Program Annual Summary provides a summary for all specified samples collected during the referenced surveillance period. Deviations from the sample schedule or missing data, if any, are noted and explained in Table 1A. Samples not meeting the specified "A PRIORI" LLD, if any, are noted and explained in Table 1B. Analysis data for all specified samples analyzed during the surveillance period is provided in Attachment B.

D. Land Use Census A Land Use Census Survey out to a distance of a five mile radius from the St.

Lucie Plant is conducted annually to determine the location of the nearest milk animal, residence, and garden producing broad leaf vegetation, in each of the 16 meteorological sectors. A summary of the Land Use Census for the surveillance year is provided in Table 2, Land Use Census Summary.

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) proficiency Testing, consisting of the MRaD and RadCheM study.

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

The results for nuclides associated with the REMP are listed in ATTACHMENT C, RESULTS FROM THE INTERLABORATORY COMPARISON PROGRAM.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 III. DISCUSSION AND INTERPRETATION OF RESULTS A. Reporting of Results The Annual Radiological Environmental Operating Report contains the summaries, interpretations and information required by St. Lucie Plant ODCM. Table 1 provides a summary of the measurements made for the nuclides required by ODCM, Table 4.12-1, for all samples specified by Table 3.12-1. In addition, summaries are provided for other nuclides identified in the specified samples, including those not related to station operation. These include nuclides such as K-40, Th-232, Ra-226, and Be-7, which are common 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 shows no indication of any adverse trends attributed to effluents from the plant. The measured exposure rates are consistent with exposure rates that were observed during the pre-operational surveillance program.
2. Air Particulates/Radioiodine:

For results attributed to plant effluents: The results for radioactive air particulate and radioiodine monitoring are consistent with past measurements and indicate no trends attributed to plant effluents. All samples for radioiodine yielded no detectable I-131. Gamma isotopic measurements yielded no indication of any nuclides attributed to station operation. The results for air particulate/radioiodine samples are consistent with measurements that were made during the pre-operational surveillance program.

Air particulate and radioiodine monitoring results are summarized in Table 1 and are trended in Figure 2 below.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 Figure 2 - St. Lucie 2018 REMP Program Gross Beta in Air, pCi/m3 0.045 0.040 0.035 Gross Beta in Air Conc. (pCi/m3) 0.030 0.025 0.020 0.015 0.010 0.005 0.000 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 Min All Indicator Locations Week of the Year 2018 Avg All Indicator Locations Max All Indicator Locations Control Location

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2

3. Waterborne, Surface Water:

The results for radioactivity measurements in surface water are consistent with past measurements and with measurements made during the pre-operational surveillance program. Tritium was reported as present in 2 of the 52 ODCM required samples for the indicator location and none of the 12 samples of the control location surface water samples collected. The highest value was 10.0%

of the required lower limit of detection and 1.0% of the reporting level listed in ODCM Table 3.12-2. There were no indications of any other nuclides that could be attributed to plant effluents. Results are summarized in Table 1.

4. Waterborne, Sediment and Food Products:

The results for radioactivity measurements in waterborne sediment, fish, and crustacean samples are consistent with past measurements and with measurements made during the pre-operational surveillance program. For the Fish Ingestion Pathway, Cs-137 was not reported for the two samples at the indicator location as well as the 2 samples at the control location. There were no indications of any other nuclides that could be attributed to plant effluents.

Results for the waterborne sediment, fish, and crustacean samples are summarized in Table 1.

5. Broad Leaf Vegetation:

The results for radioactivity measurements in broad leaf vegetation are consistent with past measurements and with measurements made during the pre-operational surveillance program. Cs-137 was reported in 1 of the 24 ODCM required samples and was not present in any of the 12 Control locations. The highest value was 7.5% of the required lower limit of detection and 0.3% of the reporting level listed in ODCM Table 3.12-2. There were no indications of any other nuclides that could be attributed to plant effluents.

Results for broad leaf vegetation samples are summarized in Table 1.

6. Land Use Census:

There was one change identified in the Land Use Census as compared to last years report. There is no longer a garden present in the WNW Sector, 4 miles at 282°.

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

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

The Land Use Census is summarized in Table 2.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2

7. Interlaboratory Comparison Program:

The State of Florida laboratory participated in MAPEP Series 38, the ERA MRAD-28, and the ERA RadCheM-113. These satisfied the requirements as directed in the PSL Offsite Dose Calculation Manual (ODCM) for the Interlaboratory Comparison Program.

The results are listed in Attachment C.

C. Conclusions The data obtained through the St. Lucie Plant Radiological Environmental Monitoring Program 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 being increased. Measured exposure rates are consistent with exposure rates that were 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 was 10.0% of the required lower limit of detection and 1.0% of the reporting level listed in ODCM Table 3.12-1. There were no indications of any other nuclides that could be attributed to plant effluents.
  • The highest value for Cs-137 in broad leaf vegetation was in the control location, and 7.5% of the required lower limit of detection and 0.3% of the reporting level listed in ODCM Table 3.12-1. There were no indications of any other nuclides that could be attributed to plant effluents.
  • There were no other indications in the waterborne, sediment, or food products of any other nuclides that could be attributed to plant effluents.

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

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: DIRECT RADIATION SAMPLES COLLECTED: TLD UNITS: micro-R/hr Location with Highest Annual Mean Name c Mean (f)b Type and Total Number Lower Limit of All Indicator Distance & Range Control Locations of Analyses Performed Detection a (LLD) Locations Direction Mean (f)b Range Mean (f)b Range d --- 3.43 (103/104) NW-10 4.52 (4/4) 3.57 (4/4)

Exposure Rate, 106 2.89 - 4.69 9.6 mi., NW 4.32 - 4.69 3.48 - 3.69 Number of Non-Routine Reported Measurements = 0 Page 1 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: AIRBORNE SAMPLES COLLECTED: RADIOIODINE AND PARTICULATES UNITS: PICO - Ci/M3 Location with Highest Annual Mean Name c Mean (f)b Type and Total Number Lower Limit of All Indicator Distance & Range Control Locations of Analyses Performed Detection a (LLD) Locations Direction Mean (f)b Range Mean (f)b Range 131 I, 256 0.012 <MDA --- --- <MDA Gross Beta, 257 0.0064 0.0130 (205/208) H-08 0.014 (52/52) 0.015 (52/52) 0.0030 - 0.0390 6 mile, WNW 0.005 - 0.039 0.004 - 0.027 Composite Gamma Isotopic, 20 7

Be 0.006 0.1494 (16/16) H-14 0.1608 (4/4) 0.1621 (4/4) 0.099- 0.205 1 mile, SE 0.1267 - 0.205 0.1387 - 0.205 134 Cs 0.0008 <MDA <MDA <MDA <MDA 137 Cs 0.0008 <MDA <MDA <MDA <MDA 210 Pb --- 0.0218 (16/16) H-14 0.0282 (4/4) 0.0104 (4/4) 0.0138 - 0.0375 1 mile, SE <0.0212 - 0.0375 <0.0367 - 0.0137 Be-7 & Pb-210 are naturally occurring.

Number of Non-Routine Reported Measurements = 0 Page 2 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: WATERBORNE SAMPLES COLLECTED: SURFACE WATER UNITS: PICO - Ci/LITER Location with Highest Annual Mean Namec Mean (f)b Type and Total Number Lower Limit of All Indicator Distance & Range Control Locations of Analyses Performed Detectiona (LLD) Locations Direction Mean (f)b Range Mean (f)b Range Tritium, 64 172 213 (2/52) H-15 213 (2/52) <MDA (0/12) 127 - 299 <1 mi., ENE/E/ESE 127 - 299 Gamma Isotopic, 64 40 K 58 378 (52/52) H-15 378 (52/52) 356 (12/12) 308 - 452 <1 mi., ENE/E/ESE 308 - 452 296 - 424 54 Mn 3 <MDA --- --- <MDA 59 Fe 6 <MDA --- --- <MDA 58 Co 3 <MDA --- --- <MDA 60 Co 4 <MDA --- --- <MDA 65 Zn 7 <MDA --- --- <MDA 95 Zr-Nb 6-3 <MDA --- --- <MDA 131 I 4 <MDA --- --- <MDA 134 Cs 4 <MDA --- --- <MDA 137 Cs 4 <MDA --- --- <MDA 140 Ba-La 9-3 <MDA --- --- <MDA K-40 is naturally occurring.

Number of Non-Routine Reported Measurements = 0 Page 3 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: WATERBORNE SAMPLES COLLECTED: SHORELINE SEDIMENT UNITS: PICO - Ci/Kg, DRY Location with Highest Annual Mean Namec Mean (f)b Type and Total Number of Lower Limit of All Indicator Distance & Direction Range Control Locations Analyses Performed Detectiona (LLD) Locations Mean (f)b Range Mean (f)b Range Gamma Isotopic, 4 7

Be 56 <MDA --- --- <MDA 40 K 100 506 (1/2) H-15 506 (1/2) 218 (1/2)

<1 mi, ENE/E/ESE 58 Co 6 <MDA --- --- <MDA 60 Co 7 <MDA --- --- <MDA 134 Cs 7 <MDA --- --- <MDA 137 Cs 7 <MDA --- --- <MDA 210 Pb --- <MDA --- --- ---

226 Ra 15 H-15 569(1/2) 309(2/2) 569(1/2) <1 mi., ENE/E/ESE 249-368 232 Th 25 160(1/2) H-15 160 (1/2) 64(1/2)

<1 mi., ENE/E/ESE 235 U --- 36 (1/2) H-15 36 (1/2) 23 (1/2)

<1 mi., ENE/E/ESE 238 U --- 229 (2/2) H-15 229 (2/2) 240 (1/2) 101 - 357 <1 mi., ENE/E/ESE 101 - 357 Be-7, K-40, Pb-210, Ra-226, Th-232, U-235 & U-238 are naturally occurring. Number of Non-Routine Reported Measurements = 0 Page 4 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: INGESTION SAMPLES COLLECTED: CRUSTACEA UNITS: PICO - Ci/Kg, WET Location with Highest Annual Mean Namec Mean (f)b Type and Total Number Lower Limit of All Indicator Distance & Direction Range Control Locations of Analyses Performed Detectiona (LLD) Locations Mean (f)b Range Mean (f)b Range Gamma Isotopic, 4 40 K 270 1735 (2/2) H-15 1735 (2/2) 1539 (2/2) 1659-1810 <1 mi., NE/ENE/E 1659-1810 1360-1717 54 Mn 16 <MDA --- --- <MDA 59 Fe 28 <MDA --- --- <MDA 58 Co 15 <MDA --- --- <MDA 60 Co 16 <MDA --- --- <MDA 65 Zn 32 <MDA --- --- <MDA 134 Cs 16 <MDA --- --- <MDA 137 Cs 18 <MDA --- --- <MDA 226 Ra 300 <MDA --- --- 357 (1/2) 228 Ra 58 < MDA --- --- < MDA K-40, Ra-226 & Ra-228 are naturally occurring.

Number of Non-Routine Reported Measurements = 0 Page 5 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: INGESTION SAMPLES COLLECTED: FISH UNITS: PICO - Ci/Kg, WET Location with Highest Annual Mean Namec Mean (f)b Type and Total Number Lower Limit of All Indicator Distance & Direction Range Control Locations of Analyses Performed Detectiona (LLD) Locations Mean (f)b Range Mean (f)b Range Gamma Isotopic, 4 40 K 270 2553 (2/2) H-15 2553 (2/2) 2659 (2/2) 2500-2606 <1 mi., ENE/E/ESE 2500-2606 2590-2727 54 Mn 16 <MDA --- --- <MDA 59 Fe 28 <MDA --- --- <MDA 58 Co 15 <MDA --- --- <MDA 60 Co 16 <MDA --- --- <MDA 65 Zn 32 <MDA --- --- <MDA 134 Cs 16 <MDA --- --- <MDA 137 Cs 18 <MDA --- --- <MDA K-40 is naturally occurring.

Number of Non-Routine Reported Measurements = 0 Page 6 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

PATHWAY: INGESTION SAMPLES COLLECTED: BROAD LEAF VEGETATION UNITS: PICO - Ci/Kg, WET Location with Highest Annual Mean Namec Mean (f)b Type and Total Number of Lower Limit of All Indicator Distance & Direction Range Control Locations Analyses Performed Detectiona (LLD) Locations Mean (f)b Range Mean (f)b Range Gamma Isotopic, 36 7

Be 64 1024 (24/24) H-52 1123 (12/12) 973(12/12) 419 - 2297 1 mi., S/SSE 450- 2297 444 - 1548 40 K 120 4159 (24/24) H-51 4490 (12/12) 3302 (12/12) 2586 - 5934 1 mi., N/NNW 2586 - 5934 2545 - 3917 58 Co 6 <MDA --- --- <MDA 60 Co 8 <MDA --- --- <MDA 131 I 8 <MDA --- --- <MDA 134 Cs 8 <MDA --- --- <MDA 137 Cs 8 <MDA --- --- 8 (2/12) 7-9 210 Pb 443 (5/24) H-52 539 (1/12) 543 (3/12) 142 - 907 1 mi., S/SSE 234-1160 212 Pb --- 28 (11/24) H-52 33 (4/12) 24 (5/12) 10-47 1 mi., S/SSE 13-47 14-38 226 Ra 189 377 (2/24) H-52 408 (1/12) 250 (1/12) 345-408 1 mi., S/SSE Be-7, K-40, Pb-210, Pb-212, & Ra-226 are naturally occurring.

Number of Non-Routine Reported Measurements = 0 Page 7 of 8

TABLE 1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility St. Lucie Units 1 & 2 , Docket No(s). 50-335 & 50-389 Location of Facility St. Lucie, Florida , Reporting Period January 1 - December 31, 2018 (County, State)

NOTES

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

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

b. Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f).
c. Specific identifying information for each sample location is provided in Attachment A.
d. Results were based upon the average net response of three elements in a TLD (thermoluminescent dosimeter).

MDA refers to minimum detectable activity.

Page 8 of 8

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 TABLE 1A DEVIATIONS / MISSING DATA Page 1 of 2 There were several instances of missing data and air sampler partial run times as follows:

A) Pathway: Direct Radiation Exposure Location: TLD: WSW-10 Dates: 12/04/17 - 03/19/18 Deviation: Failure to Perform Continuous Monitoring Description of Problem: TLD was missing and lost during quarter 1 sampling by the State of Florida Bureau of Radiation Control (BRC) at the ODCM required REMP Program sampling location WSW-10; located 10 miles WSW on a utility poll.

Corrective Action: Replaced TLD B) Pathway: Airborne, Particulates and Radioiodines Location: H14, 1 miles SE Dates: 01/16/18 - 01/23/18 Deviation: Failure to Perform Continuous Monitoring Description of Problem: The pump failed during the sampling week.

Estimated run time for the week was 69.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> out of 139.75..

Corrective Action: Replaced the Pump C) Pathway: Radioiodines Location: H34, Site Met Tower 0.5 miles N Dates: 04/24/18 - 05/01/18 Deviation: Failure to Perform Continuous Monitoring Description of Problem: The Iodine cartridge was discovered outside on top of the rain shield at time of collection. No air volume flowed through the cartridge.

Corrective Action: Replaced the Cartridge

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 Page 2 of 2 D) Pathway: Airborne, Particulates and Radioiodines Location: H30, 2 miles W Dates: 09/25/18 - 10/02/18 Deviation: Failure to Perform Continuous Monitoring Description of Problem: Power was lost at the air sample station upon arrival on 10/02/18. Near normal collection volume.

Corrective Action: Power was not restored until 10/11/18 due to the need of temporary power.

E) Pathway: Airborne, Particulates and Radioiodines Location: H30, 2 miles W Dates: 10/02/18 - 10/11/18 Deviation: Failure to Perform Continuous Monitoring Description of Problem: Power was lost at the air sample station from 10/02/18- 10/11/18 .

Corrective Action: Power was restored with alternative power on 10/11/18

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 TABLE 1B ANALYSIS WITH LLDs ABOVE THE REQUIRED DETECTION CAPABILITIES (LLDs) Listed in ODCM TABLE 4.12-1 1/1/2018 - 12/31/2018 The values specified in ODCM Table 4.12-1, Detection Capabilities, were achieved for all samples.

REMP Program sampling deviations and missing data are listed in Table 1A.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 TABLE 2 LAND USE CENSUS Page 1 of 2 The St. Lucie Annual Land Use Census Survey was performed from June through August 2018 -

There was one change identified as compared to the 2017 St. Lucie Annual Land Use Census Survey. No locations were identified of potential milk-producing animals (cows or goats).

Distance to Nearest (a, b)

Sector Residence Garden (d) Milk Animal (c)

N O (e) O O NNE O O O NE O O O ENE O O O E O O O ESE O O O SE 1.5/142 O O 1.6/145 SSE 1.8/147 (g) L (f) L 2.0/149 S 3.3/190 L L SSW 2.2/212 4.4/207 L SW 1.9/234 L L WSW 1.9/240 2.0/250 L W 1.9/260 L L WNW 2.3/281 L L NW 3.4/304 L L NNW 2.7/344 L L

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 TABLE 2 LAND USE CENSUS Page 2 of 2 NOTES

a. All categories surveyed out to a 5-mile radius from the St. Lucie Plant.
b. The following format is used to denote the location:

distance (miles) / bearing (degrees)

For example, a residence located in the southeast sector at a distance of 1.5 miles bearing 142 degrees is recorded as 1.5/142.

c. Potential milk animal locations.
d. Only gardens with an estimated total area of 500 square feet, or more, and producing green leafy vegetables are considered.
e. O denotes that the sector area is predominantly an ocean area.
f. L denotes that the sector area is predominantly a land area unoccupied by the category type.
g. Non-residential occupied buildings in these sectors include the following:

Sector Distance Description SSE 1.8/147 Fire Station

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 ATTACHMENT A KEY TO SAMPLE LOCATIONS

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 SITE AREA MAP & ENVIRONMENTAL SAMPLE LOCATIONS Page 1 of 5

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 ENVIRONMENTAL SAMPLE LOCATIONS (10 MILES)

Page 2 of 5

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 PAGE 3 OF 5 PATHWAY: DIRECT RADIATION SAMPLES COLLECTED: TLD SAMPLE COLLECTION FREQUENCY: QUARTERLY Location Direction Approximate Description Name Sector Distance (miles)

N-1 N 1 A1A, North of Blind Creek NNW-5 NNW 4.8 Frederick Douglas Beach Entrance NNW-10 NNW 8.7 Coast Guard Station NW-5 NW 5.4 Indian River Dr. at Rio Vista Dr.

NW-10 NW 9.6 FPL Facility, S.R. 68 and 33RD St.

WNW-2 WNW 2.3 Cemetery South of 7107 Indian River Dr.

WNW-5 WNW 5.1 U.S. 1 at S.R. 712 WNW-10 WNW 10 S.R. 70, West of Interstate 95 W-2 W 2 Power Line - 77609 Indian River Drive W-5 W 5.4 Oleander and Sager Street W-10 W 10.3 Interstate 95 and S.R. 709 WSW-2 WSW 1.8 8503 Indian River Dr.

WSW-5 WSW 5.6 Prima Vista Blvd. at Yacht Club WSW-10 WSW 10 Del Rio and Davis Street 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 Rd.

SSW-2 SSW 2.6 10307 Indian River Drive SSW-5 SSW 6 U.S. 1 and Port St. Lucie Blvd.

SSW-10 SSW 8 Pine Valley and Westmoreland Rd.

S-5 S 5.2 13189 Indian River Drive S-10 S 10.8 U.S. 1 and Palm City Ave S/SSE-10 SSE 9.9 Indian River Dr. 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 Control:

H32 NNW 18.1 U. of Florida IFAS Entomology Lab Vero Beach

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 PAGE 4 OF 5 PATHWAY: AIRBORNE SAMPLES COLLECTED: RADIOIODINE AND PARTICULATES SAMPLE COLLECTION FREQUENCY: WEEKLY Location Direction Approximate Description Name Sector Distance (miles)

H08 WNW 6 FPL Substation, Weatherbee Rd.

H14 SE 1 On-Site, near south property line H30 W 2 Power Line, 7609 Indian River Drive H34 N 0.5 Onsite at Meteorological Tower Control:

H12 S 12 FPL Substation, SR-76 Stuart PATHWAY: WATERBORNE SAMPLES COLLECTED: SURFACE WATER (OCEAN)

SAMPLE COLLECTION FREQUENCY: H-15 WEEKLY, H-59 MONTHLY Location Direction Approximate Description Name Sector Distance (miles)

H15 ENE/E/SSE <1 Atlantic Ocean, public beaches east side A1A Control:

H59 S/SSE 10-20 Near south end of Hutchinson Island

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 PAGE 5 OF 5 SAMPLES COLLECTED: SHORELINE SEDIMENT SAMPLE COLLECTION FREQUENCY: SEMI-ANNUALLY Location Direction Approximate Description Name Sector Distance (miles)

H15 ENE/E/ESE <1 Atlantic Ocean, public beaches east side A1A Control:

H59 S/SSE 10-20 Near south end of Hutchinson Island PATHWAY: INGESTION - FOOD PRODUCTS SAMPLES COLLECTED: CRUSTACEA AND FISH SAMPLE COLLECTION FREQUENCY: SEMI-ANNUALLY Location Direction Approximate Description Name Sector Distance (miles)

H15 ENE/E/ESE <1 Ocean Side, Vicinity of St. Lucie Plant Control:

H59 S/SSE 10-20 Near south end of Hutchinson Island SAMPLES COLLECTED: BROAD LEAF VEGETATION - FOOD PRODUCTS SAMPLE COLLECTION FREQUENCY: MONTHLY Location Direction Approximate Description Name Sector Distance (miles)

H51 N/NNW 1 Off-Site Near North Property Line H52 S/SSE 1 Off-Site Near South Property Line Control:

H59 S/SSE 10-20 Near south end of Hutchinson Island

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 ATTACHMENT B RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE SITE 2018 First Quarter 2018 Second Quarter 2018 Third Quarter 2018 Fourth Quarter 2018

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FIRST QUARTER 2018 BUREAU OF RADIATION CONTROL

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling First Quarter, 2018 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 27 52
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 1 4.b. Broadleaf Vegetation Monthly 3 9 Total: 210 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.

SL QR 1Q-2018

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

Sample Deployment 04-Dec-17 Sample Deployment 04-Dec-17 Site Collection 19-Mar-18 Site Collection 19-Mar-18 Old New Old New N-1 3.02 +/- 0.18 3.17 +/- 0.28 SW-2 2.93 +/- 0.27 3.28 +/- 0.08 NNW-5 3.21 +/- 0.24 3.61 +/- 0.08 SW-5 3.79 +/- 0.19 3.91 +/- 0.16 NNW-10 3.74 +/- 0.23 4.02 +/- 0.07 SW-10 3.28 +/- 0.22 3.27 +/- 0.18 NW-5 3.04 +/- 0.32 3.24 +/- 0.46 SSW-2 3.18 +/- 0.21 3.30 +/- 0.21 NW-10 4.31 +/- 0.51 4.32 +/- 0.62 SSW-5 3.61 +/- 0.32 3.79 +/- 0.26 WNW-2 3.09 +/- 0.27 3.22 +/- 0.42 SSW-10 2.99 +/- 0.26 3.04 +/- 0.14 WNW-5 3.12 +/- 0.15 3.34 +/- 0.37 S-5 3.39 +/- 0.10 3.41 +/- 0.13 WNW-10 3.10 +/- 0.26 3.20 +/- 0.27 S-10 3.26 +/- 0.27 3.31 +/- 0.24 W-2 3.04 +/- 0.15 3.22 +/- 0.29 S/SSE-10 3.12 +/- 0.40 3.31 +/- 0.35 W-5 3.55 +/- 0.13 3.62 +/- 0.21 SSE-5 3.09 +/- 0.14 3.19 +/- 0.11 W-10 2.83 +/- 0.33 3.08 +/- 0.26 SSE-10 3.45 +/- 0.05 3.43 +/- 0.52 WSW-2 3.16 +/- 0.07 3.36 +/- 0.34 SE-1 3.04 +/- 0.32 3.25 +/- 0.14 WSW-5 3.15 +/- 0.36 3.34 +/- 0.25 H-32 3.40 +/- 0.20 3.48 +/- 0.26 WSW-10 *

  • - Both TLDs missing upon collection; unable to locate in vicinity around utility pole.

1 of 13

SL QR 1Q-2018 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 03-Jan-18 <0.02 <0.02 <0.02 <0.02 <0.02 09-Jan-18 <0.02 <0.02 <0.02 <0.02 <0.02 17-Jan-18 <0.01 <0.01 <0.01 <0.01 <0.01 23-Jan-18 <0.03 <0.03 <0.01(A) <0.03 <0.03 31-Jan-18 <0.01 <0.01 <0.01 <0.01 <0.01 08-Feb-18 <0.01 <0.01 <0.01 <0.01 <0.01 14-Feb-18 <0.02 <0.02 <0.02 <0.02 <0.00 21-Feb-18 <0.03 <0.03 <0.03 <0.03 <0.03 27-Feb-18 <0.02 <0.02 <0.02 <0.02 <0.02 05-Mar-18 <0.03 <0.03 <0.03 <0.03 <0.03 13-Mar-18 <0.02 <0.02 <0.02 <0.02 <0.02 19-Mar-18 <0.03 <0.03 <0.03 <0.02 <0.03 27-Mar-18 <0.02 <0.02 <0.02 <0.02 <0.02 (A) Pump failed and was replaced. Estimated run time 69.4 out of 139.75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br />.

2 of 13

SL QR 1Q-2018 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 03-Jan-18 0.010 +/- 0.002 0.019 +/- 0.002 0.014 +/- 0.002 0.015 +/- 0.002 0.014 +/- 0.002 09-Jan-18 0.022 +/- 0.003 0.019 +/- 0.003 0.023 +/- 0.003 0.019 +/- 0.003 0.020 +/- 0.003 17-Jan-18 0.014 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 0.010 +/- 0.002 23-Jan-18 0.022 +/- 0.003 0.020 +/- 0.003 0.014 +/- 0.004(A) 0.011 +/- 0.002 0.017 +/- 0.003 31-Jan-18 0.011 +/- 0.002 0.014 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 0.011 +/- 0.002 08-Feb-18 0.016 +/- 0.002 0.016 +/- 0.002 0.018 +/- 0.002 0.014 +/- 0.002 0.014 +/- 0.002 14-Feb-18 0.006 +/- 0.002 0.007 +/- 0.002 0.011 +/- 0.002 0.007 +/- 0.002 0.009 +/- 0.002 21-Feb-18 0.009 +/- 0.002 0.014 +/- 0.002 0.012 +/- 0.002 0.010 +/- 0.002 0.007 +/- 0.002 27-Feb-18 0.039 +/- 0.003 0.021 +/- 0.003 0.011 +/- 0.002 0.020 +/- 0.003 0.018 +/- 0.003 05-Mar-18 0.015 +/- 0.002 0.018 +/- 0.002 0.012 +/- 0.002 0.021 +/- 0.003 0.015 +/- 0.002 13-Mar-18 0.017 +/- 0.002 0.019 +/- 0.002 0.018 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 19-Mar-18 0.026 +/- 0.003 0.025 +/- 0.003 0.019 +/- 0.002 0.020 +/- 0.002 0.020 +/- 0.003 27-Mar-18 0.023 +/- 0.002 0.020 +/- 0.002 0.022 +/- 0.002 0.015 +/- 0.002 0.015 +/- 0.002 Average: 0.018 +/- 0.001 0.017 +/- 0.001 0.015 +/- 0.001 0.015 +/- 0.001 0.014 +/- 0.001 (A) Pump failed and was replaced. Estimated run time 69.4 out of 139.75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br />.

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 0.2010 +/- 0.0118 <0.0181 <0.0016 <0.0012 0.0172 +/- 0.0045 H12 0.2050 +/- 0.0121 <0.0187 <0.0014 <0.0012 0.0137 +/- 0.0043 H14 0.2050 +/- 0.0127 <0.0163 <0.0016 <0.0014 0.0250 +/- 0.0049 H30 0.1560 +/- 0.0109 <0.0121 <0.0014 <0.0012 0.0155 +/- 0.0042 H34 0.1780 +/- 0.0113 <0.0164 <0.0016 <0.0012 0.0217 +/- 0.0044 3 of 13

SL QR 1Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H15 03-Jan-18 <153 366 +/- 26 <3 <3 <6 <4 <8 <6 <4 <3 <3 <11 09-Jan-18 <144 348 +/- 25 <3 <3 <7 <4 <8 <5 <4 <3 <3 <10 17-Jan-18 <161 351 +/- 25 <3 <3 <7 <4 <8 <5 <4 <3 <3 <12 23-Jan-18 <159 376 +/- 27 <3 <3 <7 <3 <7 <6 <4 <3 <3 <7 31-Jan-18 <157 395 +/- 27 <3 <3 <6 <4 <7 <6 <4 <3 <3 <8 08-Feb-18 <156 391 +/- 27 <3 <3 <6 <4 <7 <6 <4 <3 <3 <11 14-Feb-18 <147 369 +/- 26 <3 <3 <6 <4 <7 <6 <3 <3 <3 <11 21-Feb-18 <155 394 +/- 27 <3 <3 <7 <3 <7 <6 <4 <3 <3 <7 27-Feb-18 <147 377 +/- 26 <3 <3 <6 <4 <7 <5 <4 <3 <4 <11 05-Mar-18 299 +/- 31 383 +/- 27 <4 <3 <8 <4 <8 <5 <4 <4 <4 <11 13-Mar-18 127 +/- 29 413 +/- 27 <3 <3 <7 <3 <8 <5 <4 <3 <4 <11 20-Mar-18 <152 426 +/- 28 <3 <3 <6 <4 <8 <6 <3 <3 <3 <10 27-Mar-18 <152 330 +/- 25 <3 <3 <7 <3 <8 <6 <3 <3 <4 <13 H59 09-Jan-18 <144 330 +/- 25 <3 <3 <7 <3 <8 <6 <3 <3 <4 <11 13-Feb-18 <156 366 +/- 26 <3 <3 <7 <4 <8 <5 <4 <3 <4 <4 20-Mar-18 <152 375 +/- 26 <4 <3 <6 <3 <6 <6 <4 <3 <3 <9 (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.

4 of 13

SL QR 1Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 13-Feb-18 <72 <167 <9 <10 <7 <9 <760 <220 <53 <14 101 +/- 40 H59 13-Feb-18 <72 <162 <8 <9 <7 <10 <738 249 +/- 72 <55 <14 <175 4.a.1. CRUSTACEA - (pCi/kg, wet weight)

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

H59 This sample not yet collected.

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

Sample Collection Site Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 27-Mar-18 2500 +/- 216 <20 <24 <42 <24 <56 <20 <21 <373 <102 H59 This sample not yet collected.

5 of 13

SL QR 1Q-2018 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 09-Jan-18 1028 +/- 58 3599 +/- 168 <11 <9 <14 <978 <19 <258 <56 13-Feb-18 1063 +/- 63 4059 +/- 186 <12 <11 <13 <922 39 +/- 8 <236 <52 20-Mar-18 602 +/- 64 4981 +/- 242 <16 <15 <19 <1448 <31 <369 <82 H52 09-Jan-18 1299 +/- 76 3193 +/- 178 <14 <12 <16 <1062 <26 <307 <62 13-Feb-18 1320 +/- 76 3938 +/- 198 <15 <14 <18 <1111 47 +/- 7 408 +/- 120 <74 20-Mar-18 682 +/- 61 4114 +/- 206 <15 <13 <16 <1131 <25 <328 <68 H59 09-Jan-18 1548 +/- 81 3531 +/- 183 <15 <13 <16 <1039 <29 <367 <61 13-Feb-18 1068 +/- 62 2745 +/- 144 <12 <9 <15 <902 38 +/- 6 250 +/- 68 <58 20-Mar-18 444 +/- 51 3657 +/- 179 <13 <12 <16 1160 +/- 367 18 +/- 8 <296 <59 6 of 13

SL QR 1Q-2018 ST. LUCIE SITE Supplemental Sampling First Quarter, 2018 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 9 18
2. Airborne 2.a. Air Iodines Weekly 3 39 2.b. Air Particulates Weekly 3 39
3. Waterborne 3.a. Surface Water Monthly 2 6 3.b. Shoreline Sediment Semiannually 4 4 3.c. Beach Sand Semiannually 3 3 3.d. Ground Water Quarterly 10 10
4. Ingestion 4.a. Garden Crops Annually 1 0 4.b. Citrus Annually 1 1 Total: 120 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 of 13

SL QR 1Q-2018

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

Sample Deployment 04-Dec-17 Site Collection 19-Mar-18 Old New H08 3.92 +/- 0.14 3.89 +/- 0.07 H09 3.33 +/- 0.32 3.73 +/- 0.13 H12 7.78 +/- 0.57 7.51 +/- 0.24 H14 3.87 +/- 0.27 3.84 +/- 0.32 H33 3.47 +/- 0.16 3.61 +/- 0.16 H34 3.37 +/- 0.19 3.41 +/- 0.10 H60 3.48 +/- 0.19 3.80 +/- 0.16 H61 4.43 +/- 0.29 4.54 +/- 0.41 H62 3.75 +/- 0.17 4.02 +/- 0.34 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 03-Jan-18 <0.02 <0.02 <0.02 09-Jan-18 <0.02 <0.02 <0.02 17-Jan-18 <0.01 <0.01 <0.01 23-Jan-18 <0.03 <0.03 <0.03 31-Jan-18 <0.01 <0.01 <0.01 08-Feb-18 <0.01 <0.01 <0.01 14-Feb-18 <0.02 <0.02 <0.02 21-Feb-18 <0.03 <0.03 <0.03 27-Feb-18 <0.02 <0.02 <0.02 05-Mar-18 <0.03 <0.03 <0.03 13-Mar-18 <0.02 <0.02 <0.02 19-Mar-18 <0.03 <0.02 <0.02 27-Mar-18 <0.02 <0.02 <0.03 8 of 13

SL QR 1Q-2018 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 03-Jan-18 0.014 +/- 0.002 0.018 +/- 0.002 0.011 +/- 0.002 09-Jan-18 0.016 +/- 0.002 0.020 +/- 0.003 0.013 +/- 0.002 17-Jan-18 0.010 +/- 0.002 0.011 +/- 0.002 <0.006 23-Jan-18 0.023 +/- 0.003 0.024 +/- 0.003 0.017 +/- 0.003 31-Jan-18 0.013 +/- 0.002 0.016 +/- 0.002 0.010 +/- 0.002 08-Feb-18 0.011 +/- 0.002 0.016 +/- 0.002 0.014 +/- 0.002 14-Feb-18 0.008 +/- 0.002 0.008 +/- 0.002 <0.007 21-Feb-18 0.013 +/- 0.002 0.008 +/- 0.002 0.012 +/- 0.002 27-Feb-18 0.022 +/- 0.003 0.023 +/- 0.003 0.011 +/- 0.002 05-Mar-18 0.017 +/- 0.002 0.018 +/- 0.002 0.013 +/- 0.002 13-Mar-18 0.020 +/- 0.002 0.020 +/- 0.002 0.014 +/- 0.002 19-Mar-18 0.030 +/- 0.003 0.027 +/- 0.003 0.019 +/- 0.002 27-Mar-18 0.026 +/- 0.002 0.025 +/- 0.002 0.019 +/- 0.002 Average: 0.017 +/- 0.001 0.018 +/- 0.001 <0.013 2.b.2. AIR PARTICULATES - GAMMA ANALYSIS OF QUARTERLY COMPOSITES - (pCi/m³)

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.2020 +/- 0.0122 <0.0165 <0.0015 <0.0013 0.0147 +/- 0.0044 H32 0.1610 +/- 0.0108 <0.0135 <0.0016 <0.0013 0.0237 +/- 0.0048 H33 0.1470 +/- 0.0119 <0.0318 <0.0017 <0.0012 <0.0404 9 of 13

SL QR 1Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H13 09-Jan-18 <152 351 +/- 25 <3 <3 <8 <3 <8 <5 <4 <3 <3 <11 13-Feb-18 <156 315 +/- 24 <3 <3 <6 <3 <7 <5 <4 <3 <3 <11 20-Mar-18 <152 425 +/- 28 <4 <3 <7 <4 <8 <5 <4 <3 <3 <11 H36 09-Jan-18 <152 345 +/- 25 <3 <3 <7 <4 <8 <5 <4 <3 <3 <12 13-Feb-18 3886 +/- 111 400 +/- 28 <3 <3 <6 <3 <7 <6 <4 <3 <3 <12 20-Mar-18 <152 372 +/- 27 <3 <3 <7 <4 <7 <5 <4 <3 <3 <10 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

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

10 of 13

SL QR 1Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 13-Feb-18 42 +/- 11 908 +/- 55 <7 <6 <7 5+/-2 186 +/- 70 189 +/- 53 32 +/- 8 12 +/- 3 107 +/- 17 H16 13-Feb-18 <69 <167 <8 <9 <8 <8 <692 <252 <55 <16 <152 H19 13-Feb-18 <49 <91 <5 <6 <6 <6 <165 <149 <31 <9 <87 H36 13-Feb-18 2140 +/- 104 5240 +/- 259 <20 54 +/- 6 <18 55 +/- 7 5830 +/- 1430 <437 178 +/- 27 102 +/- 45 2490 +/- 119 3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 13-Feb-18 50 +/- 10 <89 <5 <5 <6 <6 <240 <142 <31 <9 40 +/- 14 H16 13-Feb-18 <81 <162 <9 <9 <8 <10 <765 223 +/- 82 <53 14 +/- 5 <148 H19 13-Feb-18 <64 <95 <7 <7 <8 <8 326 +/- 83 478 +/- 67 78 +/- 9 30 +/- 4 145 +/- 19 11 of 13

SL QR 1Q-2018 3.d. GROUND WATER - (pCi/L)

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

H70 22-Jan-18 <161 <55 <3 <4 <7 <3 <9 <6 <4 <4 <4 <13 H71 22-Jan-18 560 +/- 62 350 +/- 25 <3 <4 <8 <3 <10 <6 <4 <4 <4 <13 H72 22-Jan-18 <161 300 +/- 25 <4 <4 <9 <5 <11 <7 <5 <5 <5 <17 H73 22-Jan-18 <161 88 +/- 13 <4 <4 <7 <3 <8 <6 <4 <4 <4 <11 H74 22-Jan-18 <161 371 +/- 27 <4 <4 <7 <4 <9 <6 <4 <4 <4 <13 H75 22-Jan-18 <161 264 +/- 23 <4 <3 <8 <4 <8 <6 <4 <4 <4 <8 H76 22-Jan-18 <161 <51 <3 <4 <7 <4 <10 <6 <4 <4 <4 <9 H77 22-Jan-18 <159 <47 <3 <3 <6 <3 <7 <5 <4 <3 <4 <7 H78 22-Jan-18 <159 39 +/- 11 <3 <4 <8 <3 <8 <6 <4 <4 <4 <7 H79 22-Jan-18 <159 41 +/- 9 <3 <4 <6 <4 <8 <5 <4 <4 <4 <7 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

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

12 of 13

SL QR 1Q-2018 4.a. GARDEN CROP - Collard Greens - (pCi/kg, wet weight)

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

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

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 H23 31-Jan-18 <34 1660 +/- 67 <4 <4 <5 13 of 13

RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT SECOND QUARTER 2018 BUREAU OF RADIATION CONTROL

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Second Quarter, 2018 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 27 54
2. Airborne 2.a. Air Iodines Weekly 5 65 2.b. Air Particulates Weekly 5 65
3. Waterborne 3.a. Surface Water Weekly 1 13 Monthly 1 3 3.b. Shoreline Sediment Semiannually 2 0
4. Ingestion 4.a. Fish and Invertebrates 4.a.1. Crustacea Semiannually 2 2 4.a.2. Fish Semiannually 2 1 4.b. Broadleaf Vegetation Monthly 3 9 Total: 212 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.

SL QR 2Q-2018

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

Sample Deployment 19-Mar-18 Sample Deployment 19-Mar-18 Site Collection 20-Jun-18 Site Collection 20-Jun-18 Old New Old New N-1 3.20 +/- 0.29 3.45 +/- 0.27 SW-2 3.29 +/- 0.33 3.45 +/- 0.04 NNW-5 3.33 +/- 0.21 3.33 +/- 0.27 SW-5 3.79 +/- 0.24 3.93 +/- 0.18 NNW-10 3.89 +/- 0.39 4.19 +/- 0.36 SW-10 3.28 +/- 0.24 3.62 +/- 0.43 NW-5 3.26 +/- 0.05 3.37 +/- 0.09 SSW-2 3.31 +/- 0.26 3.30 +/- 0.06 NW-10 4.38 +/- 0.51 4.69 +/- 0.26 SSW-5 3.48 +/- 0.30 4.01 +/- 0.18 WNW-2 3.21 +/- 0.29 3.45 +/- 0.11 SSW-10 2.95 +/- 0.21 3.23 +/- 0.22 WNW-5 3.20 +/- 0.26 3.39 +/- 0.21 S-5 3.29 +/- 0.08 3.50 +/- 0.18 WNW-10 3.22 +/- 0.51 3.48 +/- 0.06 S-10 3.25 +/- 0.18 3.45 +/- 0.27 W-2 3.10 +/- 0.35 3.30 +/- 0.14 S/SSE-10 3.16 +/- 0.16 3.36 +/- 0.13 W-5 3.51 +/- 0.11 3.87 +/- 0.19 SSE-5 3.02 +/- 0.30 3.32 +/- 0.18 W-10 3.03 +/- 0.39 3.22 +/- 0.55 SSE-10 3.24 +/- 0.28 3.59 +/- 0.10 WSW-2 3.39 +/- 0.12 3.56 +/- 0.31 SE-1 3.10 +/- 0.21 3.26 +/- 0.21 WSW-5 3.13 +/- 0.25 3.41 +/- 0.21 H-32 3.57 +/- 0.49 3.69 +/-0.26 WSW-10 2.85 +/- 0.16 3.10 +/- 0.09 1 of 12

SL QR 2Q-2018 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 03-Apr-18 <0.03 <0.03 <0.03 <0.03 <0.03 10-Apr-18 <0.03 <0.03 <0.03 <0.02 <0.03 17-Apr-18 <0.02 <0.03 <0.03 <0.02 <0.02 24-Apr-18 <0.02 <0.02 <0.02 <0.02 <0.02 01-May-18 <0.02 <0.02 <0.02 <0.02 (A) 08-May-18 <0.02 <0.02 <0.02 <0.02 <0.02 14-May-18 <0.02 <0.02 <0.02 <0.02 <0.02 23-May-18 <0.01 <0.01 <0.01 <0.01 <0.01 29-May-18 <0.03 <0.03 <0.03 <0.03 <0.03 05-Jun-18 <0.02 <0.02 <0.02 <0.02 <0.02 12-Jun-18 <0.02 <0.02 <0.02 <0.02 <0.02 20-Jun-18 <0.01 <0.01 <0.01 <0.01 <0.01 26-Jun-18 <0.02 <0.02 <0.02 <0.02 <0.02 (A) This is a non-collected sample. The iodine cartridge was discovered outside on top of the rain shield at time of collection, hence no air volume flowed through the cartridge.

2 of 12

SL QR 2Q-2018 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 03-Apr-18 0.012 +/- 0.002 0.010 +/- 0.002 0.013 +/- 0.002 0.004 +/- 0.001 0.018 +/- 0.002 10-Apr-18 0.012 +/- 0.002 0.009 +/- 0.002 0.011 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 17-Apr-18 0.014 +/- 0.002 0.016 +/- 0.002 0.013 +/- 0.002 0.010 +/- 0.002 0.016 +/- 0.002 24-Apr-18 0.017 +/- 0.002 0.022 +/- 0.002 0.021 +/- 0.002 0.012 +/- 0.002 0.021 +/- 0.002 01-May-18 0.019 +/- 0.002 0.021 +/- 0.002 0.024 +/- 0.002 0.009 +/- 0.002 0.020 +/- 0.002 08-May-18 0.016 +/- 0.002 0.012 +/- 0.002 0.016 +/- 0.002 0.008 +/- 0.002 0.016 +/- 0.002 14-May-18 0.015 +/- 0.002 0.013 +/- 0.002 0.014 +/- 0.002 0.008 +/- 0.002 0.014 +/- 0.002 23-May-18 0.008 +/- 0.001 0.005 +/- 0.001 0.010 +/- 0.002 0.007 +/- 0.001 0.008 +/- 0.001 29-May-18 0.007 +/- 0.002 0.007 +/- 0.002 0.009 +/- 0.002 0.008 +/- 0.002 0.011 +/- 0.002 05-Jun-18 0.006 +/- 0.002 0.009 +/- 0.002 0.014 +/- 0.002 0.009 +/- 0.002 0.012 +/- 0.002 12-Jun-18 0.013 +/- 0.002 0.014 +/- 0.002 0.009 +/- 0.002 0.013 +/- 0.002 0.014 +/- 0.002 20-Jun-18 0.011 +/- 0.002 0.015 +/- 0.002 0.013 +/- 0.002 0.006 +/- 0.001 0.012 +/- 0.002 26-Jun-18 0.012 +/- 0.002 0.020 +/- 0.003 0.010 +/- 0.002 0.013 +/- 0.002 0.009 +/- 0.002 Average: 0.013 +/- 0.001 0.013 +/- 0.001 0.014 +/- 0.001 0.009 +/- 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 0.1391 +/- 0.0115 <0.0158 <0.0015 <0.0012 <0.0207 H12 0.1432 +/- 0.0114 <0.0143 <0.0013 <0.0012 0.0071 +/- 0.0036 H14 0.1767 +/- 0.0138 <0.0244 <0.0015 <0.0011 0.0375 +/- 0.0146 H30 0.0990 +/- 0.0096 <0.0139 <0.0010 <0.0012 0.0138 +/- 0.0037 H34 0.1754 +/- 0.0150 <0.0250 <0.0015 <0.0012 <0.0392 3 of 12

SL QR 2Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H15 02-Apr-18 <155 393 +/- 26 <3 <4 <8 <3 <7 <6 <4 <3 <4 <8 10-Apr-18 <155 377 +/- 26 <3 <3 <7 <3 <7 <6 <4 <3 <3 <9 17-Apr-18 <158 366 +/- 27 <3 <3 <7 <3 <7 <5 <4 <3 <4 <11 24-Apr-18 <157 387 +/- 27 <3 <4 <7 <3 <8 <5 <4 <3 <4 <10 01-May-18 <157 403 +/- 27 <3 <3 <6 <4 <9 <6 <3 <3 <3 <11 08-May-18 <157 422 +/- 28 <3 <3 <6 <3 <7 <5 <3 <3 <4 <10 14-May-18 <158 364 +/- 26 <3 <3 <7 <3 <8 <6 <4 <3 <3 <7 23-May-18 <153 353 +/- 25 <3 <3 <6 <3 <7 <5 <3 <3 <3 <12 29-May-18 <153 361 +/- 26 <3 <3 <7 <4 <7 <6 <3 <3 <3 <11 05-Jun-18 <153 382 +/- 27 <3 <3 <7 <4 <7 <5 <3 <3 <4 <11 12-Jun-18 <159 374 +/- 27 <3 <3 <7 <3 <7 <5 <4 <3 <4 <12 20-Jun-18 <155 362 +/- 26 <3 <4 <7 <4 <8 <6 <4 <3 <4 <8 26-Jun-18 <155 391 +/- 28 <3 <3 <7 <3 <6 <5 <4 <3 <4 <12 H59 10-Apr-18 <155 339 +/- 25 <3 <3 <8 <4 <7 <5 <4 <3 <3 <8 11-May-18 <153 424 +/- 39 <5 <5 <15 <6 <16 <8 <8 <5 <6 <9 20-Jun-18 <159 296 +/- 40 <6 <5 <12 <7 <12 <10 <8 <5 <7 <11 (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.

4 of 12

SL QR 2Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

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

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

Sample Collection Site Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 12-Jun-18 1810 +/- 178 <23 <25 <50 <26 <62 <22 <22 <457 <106 H59 01-May-18 1360 +/- 124 <20 <20 <43 <20 <42 <21 <22 357 +/- 90 <99 4.a.2. FISH - Mixed Species - (pCi/kg, wet weight)

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

H59 08-Jun-18 2590 +/- 167 <19 <15 <37 <19 <39 <19 <20 <369 <70 5 of 12

SL QR 2Q-2018 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 10-Apr-18 703 +/- 54 4864 +/- 214 <13 <12 <14 <958 28 +/- 9 345 +/- 86 <56 11-May-18 802 +/- 40 4628 +/- 166 <10 <7 <8 <246 <15 <183 <35 20-Jun-18 1117 +/- 67 4623 +/- 209 <14 <11 <14 907 +/- 354 24 +/- 7 <270 <53 H52 10-Apr-18 739 +/- 53 4002 +/- 188 <13 <11 <14 <1061 43 +/- 9 <274 <60 11-May-18 1224 +/- 64 2868 +/- 142 <12 <9 <14 <758 <21 <227 <43 20-Jun-18 1136 +/- 49 3796 +/- 145 <9 <8 <7 <347 <16 <183 <35 H59 10-Apr-18 632 +/- 60 3412 +/- 181 <15 <14 <16 <1069 <28 <295 <67 11-May-18 835 +/- 44 3458 +/- 140 <11 <8 <9 <371 <17 <197 <36 20-Jun-18 1308 +/- 49 3700 +/- 137 <8 <6 <9 234 +/- 65 <15 <163 <28 6 of 12

SL QR 2Q-2018 ST. LUCIE SITE Supplemental Sampling Second Quarter, 2018 Number of Number of Sample Type Collection Frequency Sample Locations Samples

1. Direct Radiation Quarterly 9 18
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: 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.

7 of 12

SL QR 2Q-2018

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

Sample Deployment 19-Mar-18 Site Collection 20-Jun-18 Old New H08 3.71 +/- 0.17 3.90 +/- 0.50 H09 3.62 +/- 0.01 3.90 +/- 0.26 H12 7.75 +/- 1.01 8.00 +/- 0.52 H14 8.08 +/- 0.20 4.02 +/- 0.50 H33 3.54 +/- 0.21 3.98 +/- 0.21 H34 3.41 +/- 0.47 3.63 +/- 0.25 H60 3.46 +/- 0.33 3.84 +/- 0.11 H61 4.44 +/- 0.52 4.66 +/- 0.47 H62 4.12 +/- 0.22 4.07 +/- 0.39 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 03-Apr-18 <0.03 <0.03 <0.03 10-Apr-18 <0.02 <0.03 <0.03 17-Apr-18 <0.03 <0.02 <0.03 24-Apr-18 <0.02 <0.02 <0.02 01-May-18 <0.02 <0.02 <0.02 08-May-18 <0.02 <0.02 <0.02 14-May-18 <0.02 <0.02 <0.02 23-May-18 <0.01 <0.01 <0.01 29-May-18 <0.03 <0.03 <0.03 05-Jun-18 <0.02 <0.02 <0.02 12-Jun-18 <0.02 <0.02 <0.02 20-Jun-18 <0.01 <0.01 <0.01 26-Jun-18 <0.02 <0.02 <0.03 8 of 12

SL QR 2Q-2018 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 03-Apr-18 0.016 +/- 0.002 0.010 +/- 0.002 0.012 +/- 0.002 10-Apr-18 0.012 +/- 0.002 0.015 +/- 0.002 0.011 +/- 0.002 17-Apr-18 0.015 +/- 0.002 0.017 +/- 0.002 0.011 +/- 0.002 24-Apr-18 0.021 +/- 0.002 0.021 +/- 0.002 0.015 +/- 0.002 01-May-18 0.018 +/- 0.002 0.019 +/- 0.002 0.011 +/- 0.002 08-May-18 0.016 +/- 0.002 0.019 +/- 0.002 0.013 +/- 0.002 14-May-18 0.015 +/- 0.002 0.017 +/- 0.002 0.015 +/- 0.002 23-May-18 0.007 +/- 0.001 0.010 +/- 0.002 0.005 +/- 0.001 29-May-18 0.011 +/- 0.002 0.008 +/- 0.002 0.007 +/- 0.002 05-Jun-18 0.013 +/- 0.002 0.014 +/- 0.002 0.011 +/- 0.002 12-Jun-18 0.012 +/- 0.002 0.014 +/- 0.002 0.017 +/- 0.002 20-Jun-18 0.015 +/- 0.002 0.010 +/- 0.002 0.008 +/- 0.002 26-Jun-18 0.015 +/- 0.002 0.012 +/- 0.002 0.008 +/- 0.002 Average: 0.014 +/- 0.001 0.014 +/- 0.001 0.011 +/- 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 0.1760 +/- 0.0140 <0.0253 <0.0013 <0.0014 <0.0396 H32 0.1491 +/- 0.0130 <0.0231 <0.0013 <0.0008 0.0317 +/- 0.0125 H33 0.1181 +/- 0.0103 <0.0147 <0.0014 <0.0010 <0.0198 9 of 12

SL QR 2Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H13 10-Apr-18 <155 376 +/- 26 <4 <3 <8 <4 <8 <6 <4 <3 <4 <8 11-May-18 <153 337 +/- 25 <3 <3 <7 <4 <8 <6 <5 <3 <3 <5 20-Jun-18 <159 202 +/- 20 <3 <4 <6 <3 <7 <5 <4 <3 <3 <7 H36 10-Apr-18 <155 392 +/- 26 <3 <3 <7 <4 <8 <6 <4 <3 <4 <7 11-May-18 <153 372 +/- 27 <3 <3 <7 <3 <8 <5 <5 <3 <3 <5 20-Jun-18 <159 357 +/- 25 <3 <3 <8 <3 <7 <5 <5 <3 <4 <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.

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

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

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

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

10 of 12

SL QR 2Q-2018 3.d. GROUND WATER - (pCi/L)

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

H70 19-Apr-18 <158 55 +/- 12 <3 <3 <7 <3 <8 <6 <5 <3 <3 <4 H71 19-Apr-18 374 +/- 54 359 +/- 26 <3 <3 <7 <3 <8 <6 <5 <3 <4 <6 H72 19-Apr-18 <158 320 +/- 37 <6 <6 <13 <8 <14 <10 <9 <6 <7 <10 H73 19-Apr-18 <146 93 +/- 14 <3 <4 <6 <3 <7 <6 <5 <4 <4 <6 H74 19-Apr-18 <158 359 +/- 39 <6 <7 <13 <7 <13 <10 <10 <6 <7 <12 H75 19-Apr-18 <146 258 +/- 22 <3 <3 <8 <4 <9 <6 <6 <3 <4 <6 H76 19-Apr-18 <159 <95 <6 <6 <11 <6 <12 <10 <9 <5 <7 <10 H77 19-Apr-18 <158 <41 <3 <3 <7 2 <6 <6 <6 <3 <3 <5 H78 19-Apr-18 <158 <101 <5 <6 <11 <6 <13 <10 <9 <5 <6 <12 H79 19-Apr-18 <158 30 +/- 10 <3 <3 <6 <3 <8 <5 <5 <3 <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.

11 of 12

SL QR 2Q-2018 4.a. GARDEN CROP - Mixed Greens - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 H41 02-Apr-18 <90 2171 +/- 118 <10 <8 <13 4.b. CITRUS - (pCi/kg, wet weight)

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

12 of 12

SL QR 3Q-2018 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT THIRD QUARTER 2018 BUREAU OF RADIATION CONTROL

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Third Quarter, 2018 Number of Sample Type Collection Frequency Locations Sampled Samples

1. Direct Radiation Quarterly 27 54
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 2 4.b. Broadleaf Vegetation Monthly 3 9 Total: 213 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.

SL QR 3Q-2018

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

Sample Deployment 20-Jun-18 Sample Deployment 20-Jun-18 Site Collection 11-Sep-18 Site Collection 11-Sep-18 Old New Old New N-1 3.02 +/- 0.31 3.29 +/- 0.26 SW-2 3.09 +/- 0.47 3.13 +/- 0.43 NNW-5 2.98 +/- 0.24 3.18 +/- 0.39 SW-5 3.69 +/- 0.11 3.86 +/- 0.16 NNW-10 3.81 +/- 0.21 4.01 +/- 0.21 SW-10 3.10 +/- 0.21 3.31 +/- 0.42 NW-5 2.80 +/- 0.28 3.14 +/- 0.22 SSW-2 3.03 +/- 0.12 3.27 +/- 0.31 NW-10 4.14 +/- 0.17 4.60 +/- 0.40 SSW-5 3.62 +/- 0.31 3.71 +/- 0.42 WNW-2 3.11 +/- 0.05 3.12 +/- 0.30 SSW-10 2.89 +/- 0.32 2.89 +/- 0.17 WNW-5 3.06 +/- 0.15 3.19 +/- 0.37 S-5 3.49 +/- 0.38 3.50 +/- 0.33 WNW-10 3.01 +/- 0.10 3.17 +/- 0.24 S-10 3.27 +/- 0.10 3.18 +/- 0.14 W-2 2.79 +/- 0.10 3.11 +/- 0.31 S/SSE-10 3.04 +/- 0.15 3.25 +/- 0.21 W-5 3.44 +/- 0.14 3.66 +/- 0.37 SSE-5 2.91 +/- 0.32 3.18 +/- 0.33 W-10 2.54 +/- 0.35 2.99 +/- 0.17 SSE-10 3.24 +/- 0.61 3.50 +/- 0.14 WSW-2 3.19 +/- 0.17 3.23 +/- 0.40 SE-1 3.10 +/- 0.15 3.03 +/- 0.48 WSW-5 3.16 +/- 0.42 3.34 +/- 0.27 H-32 3.35 +/- 0.09 3.48 +/- 0.19 WSW-10 2.88 +/- 0.14 3.04 +/- 0.17 1 of 13

SL QR 3Q-2018 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 03-Jul-18 <0.02 <0.02 <0.02 <0.02 <0.02 10-Jul-18 <0.02 <0.02 <0.02 <0.02 <0.02 18-Jul-18 <0.02 <0.02 <0.02 <0.02 <0.02 24-Jul-18 <0.03 <0.02 <0.03 <0.03 <0.03 30-Jul-18 <0.03 <0.03 <0.03 <0.03 <0.03 07-Aug-18 <0.02 <0.02 <0.02 <0.02 <0.02 14-Aug-18 <0.02 <0.02 <0.02 <0.02 <0.02 20-Aug-18 <0.03 <0.03 <0.03 <0.03 <0.03 28-Aug-18 <0.02 <0.02 <0.02 <0.02 <0.02 04-Sep-18 <0.02 <0.02 <0.02 <0.02 <0.02 11-Sep-18 <0.02 <0.02 <0.02 <0.02 <0.02 18-Sep-18 <0.02 <0.02 <0.02 <0.02 <0.02 27-Sep-18 <0.02 <0.02 <0.02 <0.02 <0.02 2 of 13

SL QR 3Q-2018 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 03-Jul-18 0.012 +/- 0.002 0.014 +/- 0.002 0.010 +/- 0.002 0.007 +/- 0.002 0.012 +/- 0.002 10-Jul-18 0.021 +/- 0.002 0.014 +/- 0.002 0.018 +/- 0.002 0.015 +/- 0.002 0.018 +/- 0.002 18-Jul-18 0.028 +/- 0.002 0.021 +/- 0.002 0.017 +/- 0.002 0.019 +/- 0.002 0.021 +/- 0.002 24-Jul-18 0.019 +/- 0.002 0.023 +/- 0.003 0.021 +/- 0.003 0.016 +/- 0.002 0.018 +/- 0.002 30-Jul-18 0.008 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 0.009 +/- 0.002 0.012 +/- 0.002 07-Aug-18 0.012 +/- 0.002 0.014 +/- 0.002 0.013 +/- 0.002 0.004 +/- 0.001 0.010 +/- 0.002 14-Aug-18 0.010 +/- 0.002 0.014 +/- 0.002 0.014 +/- 0.002 0.008 +/- 0.002 0.013 +/- 0.002 20-Aug-18 0.014 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 0.007 +/- 0.002 0.009 +/- 0.002 28-Aug-18 0.008 +/- 0.001 0.012 +/- 0.002 0.010 +/- 0.002 0.008 +/- 0.001 0.011 +/- 0.002 04-Sep-18 0.012 +/- 0.002 0.008 +/- 0.002 0.013 +/- 0.002 0.007 +/- 0.002 0.013 +/- 0.002 11-Sep-18 0.011 +/- 0.002 0.011 +/- 0.002 0.013 +/- 0.002 0.010 +/- 0.002 0.013 +/- 0.002 18-Sep-18 0.008 +/- 0.002 0.013 +/- 0.002 0.013 +/- 0.002 0.006 +/- 0.002 0.010 +/- 0.002 27-Sep-18 0.010 +/- 0.002 0.015 +/- 0.002 0.011 +/- 0.002 0.008 +/- 0.001 0.014 +/- 0.002 Average: 0.013 +/- 0.001 0.014 +/- 0.001 0.013 +/- 0.001 0.009 +/- 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 0.1303 +/- 0.0105 <0.0188 <0.0012 <0.0012 <0.0368 H12 0.1387 +/- 0.0105 <0.0246 <0.0013 <0.0011 <0.0367 H14 0.1267 +/- 0.0090 <0.0121 <0.0014 <0.0009 0.0221 +/- 0.0046 H30 0.1060 +/- 0.0095 <0.0222 <0.0015 <0.0014 <0.0364 H34 0.1409 +/- 0.0093 <0.0100 <0.0013 <0.0011 <0.0193 3 of 13

SL QR 3Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H15 03-Jul-18 <148 337 +/- 25 <3 <4 <11 <4 <8 <7 <37 <3 <3 <16 10-Jul-18 <137 331 +/- 40 <6 <6 <15 <6 <14 <10 <33 <5 <7 <22 18-Jul-18 <143 402 +/- 27 <3 <4 <9 <3 <7 <6 <12 <3 <4 <6 24-Jul-18 <143 417 +/- 28 <3 <3 <7 <4 <7 <6 <7 <3 <4 <6 30-Jul-18 <142 406 +/- 27 <3 <4 <7 <4 <8 <6 <7 <3 <4 <5 06-Aug-18 <147 390 +/- 27 <3 <3 <7 <4 <7 <5 <5 <4 <3 <5 14-Aug-18 <143 392 +/- 27 <4 <3 <7 <4 <8 <5 <4 <3 <4 <12 20-Aug-18 <143 383 +/- 27 <4 <3 <7 <4 <7 <6 <4 <3 <3 <12 28-Aug-18 <143 367 +/- 26 <3 <3 <7 <3 <8 <5 <4 <3 <3 <11 04-Sep-18 <143 313 +/- 24 <3 <3 <7 <4 <6 <6 <3 <4 <4 <12 12-Sep-18 <143 373 +/- 26 <3 <3 <6 <3 <8 <6 <3 <3 <4 <11 18-Sep-18 <148 395 +/- 27 <4 <3 <7 <4 <8 <6 <4 <3 <3 <11 27-Sep-18 <142 342 +/- 25 <3 <3 <8 <4 <7 <5 <4 <3 <3 <10 H59 10-Jul-18 <143 316 +/- 39 <5 <8 <19 <6 <17 <13 <33 <5 <6 <24 06-Aug-18 <142 356 +/- 40 <5 <5 <13 <7 <13 <10 <11 <6 <6 <7 12-Sep-18 <148 369 +/- 26 <3 <4 <7 <4 <6 <5 <4 <4 <4 <7 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

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

4 of 13

SL QR 3Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 14-Aug-18 <95 506 +/- 60 <10 <10 <9 <12 <787 569 +/- 89 160 +/- 15 36 +/- 6 357 +/- 35 H59 14-Aug-18 45 +/- 12 218 +/- 23 <6 <5 <7 <7 309 +/- 62 368 +/- 45 64 +/- 6 23 +/- 3 240 +/- 16 4.a.1. CRUSTACEA - (pCi/kg, wet weight)

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

H59 This sample not yet collected.

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

Sample Collection Site Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 13-Sep-18 2606 +/- 189 <21 <20 <48 <22 <53 <17 <19 <358 <86 H59 27-Sep-18 2727 +/- 169 <16 <19 <33 <16 <35 <16 <20 <352 <73 5 of 13

SL QR 3Q-2018 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 10-Jul-18 939 +/- 43 4455 +/- 161 <10 <9 <9 142 +/- 58 <17 <185 <37 06-Aug-18 948 +/- 56 4328 +/- 189 <13 <10 <14 <848 <24 <229 <55 12-Sep-18 1630 +/- 59 4857 +/- 174 <9 <8 <10 326 +/- 52 10 +/- 4 <204 <36 H52 10-Jul-18 961 +/- 39 3909 +/- 142 <10 <8 <8 <237 <15 <166 <34 06-Aug-18 1011 +/- 57 3729 +/- 165 <13 <9 <12 <990 <19 <213 <47 12-Sep-18 1315 +/- 79 4854 +/- 229 <14 <15 <17 <1114 <28 <323 <73 H59 10-Jul-18 703 +/- 33 3456 +/- 129 <9 <8 <8 <215 <16 <160 <32 07-Aug-18 742 +/- 36 3354 +/- 129 <9 <7 <9 <292 <13 <164 <28 12-Sep-18 1445 +/- 74 2545 +/- 143 <14 <12 <17 <1081 <24 <324 <51 6 of 13

SL QR 3Q-2018 ST. LUCIE SITE Supplemental Sampling Third Quarter, 2018 Number of Sample Type Collection Frequency Locations Sampled Samples

1. Direct Radiation Quarterly 9 18
2. Airborne 2.a. Air Iodines Weekly 3 39 2.b. Air Particulates Weekly 3 39
3. Waterborne 3.a. Surface Water Monthly 2 6 3.b. Shoreline Sediment Semiannually 4 4 3.c. Beach Sand Semiannually 3 3 3.d. Ground Water Quarterly 10 10
4. Ingestion 4.a. Garden Crops Annually 1 0 4.b. Citrus Annually 1 0 Total: 119 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 of 13

SL QR 3Q-2018

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

Sample Deployment 20-Jun-18 Site Collection 11-Sep-18 Old New H08 3.61 +/- 0.34 3.71 +/- 0.38 H09 3.57 +/- 0.09 3.77 +/- 0.59 H12 7.63 +/- 0.47 7.71 +/- 0.44 H14 3.52 +/- 0.58 3.67 +/- 0.40 H33 3.47 +/- 0.32 3.57 +/- 0.41 H34 3.17 +/- 0.13 3.40 +/- 0.27 H60 3.50 +/- 0.52 3.61 +/- 0.51 H61 4.43 +/- 0.15 4.66 +/- 0.37 H62 3.68 +/- 0.64 3.86 +/- 0.39 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 03-Jul-18 <0.02 <0.02 <0.02 10-Jul-18 <0.02 <0.02 <0.02 18-Jul-18 <0.02 <0.20(A) <0.02 24-Jul-18 <0.02 <0.02 <0.02 30-Jul-18 <0.03 <0.03 <0.03 07-Aug-18 <0.02 <0.02 <0.02 14-Aug-18 <0.02 <0.02 <0.02 20-Aug-18 <0.03 <0.03 <0.03 28-Aug-18 <0.02 <0.02 <0.02 04-Sep-18 <0.02 <0.02 <0.02 11-Sep-18 <0.02 <0.02 <0.02 18-Sep-18 <0.02 <0.02 <0.02 27-Sep-18 <0.02 <0.02 <0.02 (A) Pump failed and was replaced. Estimated run time 15.8 out of 193.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

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SL QR 3Q-2018 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 03-Jul-18 0.008 +/- 0.002 0.013 +/- 0.002 0.009 +/- 0.002 10-Jul-18 0.018 +/- 0.002 0.021 +/- 0.002 0.017 +/- 0.002 18-Jul-18 0.023 +/- 0.002 <0.062(A) 0.021 +/- 0.002 24-Jul-18 0.022 +/- 0.003 0.019 +/- 0.002 0.020 +/- 0.002 30-Jul-18 0.012 +/- 0.002 0.013 +/- 0.002 0.012 +/- 0.002 07-Aug-18 0.015 +/- 0.002 0.013 +/- 0.002 0.009 +/- 0.002 14-Aug-18 0.013 +/- 0.002 0.015 +/- 0.002 0.013 +/- 0.002 20-Aug-18 0.016 +/- 0.002 0.011 +/- 0.002 0.007 +/- 0.002 28-Aug-18 0.010 +/- 0.002 0.011 +/- 0.002 0.011 +/- 0.002 04-Sep-18 0.010 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 11-Sep-18 0.014 +/- 0.002 0.010 +/- 0.002 0.011 +/- 0.002 18-Sep-18 0.007 +/- 0.002 0.009 +/- 0.002 0.014 +/- 0.002 27-Sep-18 0.012 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 Average: 0.014 +/- 0.001 <0.017 0.013 +/- 0.001 (A) Pump failed and was replaced. Estimated run time 15.8 out of 193.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

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

Sample Site Be-7 K-40 Cs-134 Cs-137 Pb-210 H09 0.1273 +/- 0.0089 <0.0181 <0.0014 <0.0012 0.0138 +/- 0.0038 H32 0.1260 +/- 0.0093 <0.0154 <0.0016 <0.0011 <0.0218 H33 0.0868 +/- 0.0093 <0.0231 <0.0013 <0.0013 <0.0361 9 of 13

SL QR 3Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H13 10-Jul-18 <142 218 +/- 21 <3 <4 <10 <4 <8 <6 <23 <3 <4 <11 06-Aug-18 <147 311 +/- 39 <6 <6 <14 <5 <13 <11 <8 <5 <6 <10 12-Sep-18 <143 302 +/- 24 <3 <3 <6 <4 <7 <5 <3 <3 <3 <10 H36 10-Jul-18 <148 397 +/- 27 <3 <4 <9 <4 <8 <6 <19 <3 <3 <10 06-Aug-18 <143 430 +/- 28 <3 <4 <8 <4 <8 <6 <7 <3 <3 <5 12-Sep-18 327 +/- 50 368 +/- 27 <4 <3 <7 <4 <7 <5 <4 <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.

10 of 13

SL QR 3Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 14-Aug-18 210 +/- 19 272 +/- 28 <5 <5 <6 <6 267 +/- 58 304 +/- 45 58 +/- 6 19 +/- 3 <106 H16 16-Aug-18 <91 261 +/- 48 <10 <9 <8 <10 <810 331 +/- 68 63 +/- 11 21 +/- 4 215 +/- 33 H19 14-Aug-18 <91 372 +/- 50 <8 <9 <8 <10 <957 569 +/- 79 <52 36 +/- 5 129 +/- 39 H36 16-Aug-18 505 +/- 40 4154 +/- 162 <14 132 +/- 5 <13 33 +/- 3 4207 +/- 289 995 +/- 98 257 +/- 15 63 +/- 6 1027 +/- 42 3.c. BEACH SAND - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H15 14-Aug-18 172 +/- 18 132 +/- 21 <6 <5 <6 <6 208 +/- 58 <123 54 +/- 6 18 +/- 9 152 +/- 14 H16 16-Aug-18 52 +/- 12 138 +/- 20 <6 <6 <6 <7 337 +/- 58 494 +/- 52 76 +/- 6 31 +/- 3 241 +/- 16 H19 14-Aug-18 135 +/- 25 168 +/- 41 <8 <9 <8 <9 <888 400 +/- 80 61 +/- 9 25 +/- 5 145 +/- 39 11 of 13

SL QR 3Q-2018 3.d. GROUND WATER (pCi/L)

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

H70 26-Jul-18 <143 33 +/- 9 <3 <4 <7 <3 <8 <5 <9 <3 <3 <6 H71 26-Jul-18 441 +/- 52 314 +/- 40 <6 <7 <14 <7 <13 <11 <17 <5 <6 <14 H72 26-Jul-18 <137 377 +/- 26 <3 <3 <8 <4 <8 <6 <10 <3 <3 <6 H73 26-Jul-18 <143 61 +/- 26 <6 <6 <13 <6 <11 <10 <16 <5 <7 <12 H74 26-Jul-18 <147 318 +/- 25 <3 <3 <8 <3 <8 <6 <10 <4 <3 <5 H75 26-Jul-18 <147 <39 <3 <4 <8 <3 <7 <6 <8 <3 <3 <6 H76 26-Jul-18 <147 335 +/- 40 <6 <7 <15 <6 <14 <11 <16 <5 <7 <12 H77 26-Jul-18 <147 <82 <7 <5 <11 <5 <12 <10 <16 <4 <6 <13 H78 26-Jul-18 <147 42 +/- 10 <3 <4 <7 <4 <7 <5 <10 <3 <4 <7 H79 26-Jul-18 <147 91 +/- 27 <5 <7 <13 <6 <11 <10 <18 <5 <7 <12 (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.

12 of 13

SL QR 3Q-2018 4.a. GARDEN CROPS - (pCi/kg, wet weight)

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

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

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

13 of 13

SL QR 4Q-2018 RADIOLOGICAL SURVEILLANCE OF FLORIDA POWER AND LIGHT COMPANY ST. LUCIE PLANT FOURTH QUARTER 2018 BUREAU OF RADIATION CONTROL

ST. LUCIE SITE Offsite Dose Calculation Manual Sampling Fourth Quarter, 2018 Number of Sample Type Collection Frequency Locations Sampled Samples

1. Direct Radiation Quarterly 27 54
2. Airborne 2.a. Air Iodines Weekly 5 64 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 2 4.a.2. Fish Semiannually 2 0 4.b. Broadleaf Vegetation Monthly 3 9 Total: 209 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.

SL QR 4Q-2018

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

Sample Deployment 11-Sep-18 Sample Deployment 11-Sep-18 Site Collection 05-Dec-18 Site Collection 05-Dec-18 Old New Old New N-1 3.44 +/- 0.50 3.50 +/- 0.71 SW-2 3.59 +/- 0.36 3.21 +/- 0.31 NNW-5 3.60 +/- 0.13 3.44 +/- 0.22 SW-5 4.18 +/- 0.22 3.75 +/- 0.22 NNW-10 4.25 +/- 0.09 3.95 +/- 0.12 SW-10 3.75 +/- 0.13 3.49 +/- 0.20 NW-5 3.48 +/- 0.24 3.25 +/- 0.28 SSW-2 3.43 +/- 0.14 3.44 +/- 0.47 NW-10 4.53 +/- 0.44 4.47 +/- 0.48 SSW-5 3.91 +/- 0.45 3.83 +/- 0.53 WNW-2 3.48 +/- 0.42 3.29 +/- 0.45 SSW-10 3.27 +/- 0.35 3.05 +/- 0.54 WNW-5 3.46 +/- 0.25 3.41 +/- 0.16 S-5 3.69 +/- 0.37 3.39 +/- 0.06 WNW-10 3.52 +/- 0.03 3.36 +/- 0.39 S-10 3.55 +/- 0.67 3.41 +/- 0.08 W-2 3.56 +/- 0.16 3.41 +/- 0.12 S/SSE-10 3.78 +/- 0.36 3.42 +/- 0.10 W-5 3.89 +/- 0.24 3.83 +/- 0.29 SSE-5 3.48 +/- 0.37 3.13 +/- 0.42 W-10 3.22 +/- 0.18 3.09 +/- 0.18 SSE-10 3.61 +/- 0.23 3.62 +/- 0.37 WSW-2 3.68 +/- 0.29 3.41 +/- 0.33 SE-1 3.50 +/- 0.36 3.18 +/- 0.08 WSW-5 3.72 +/- 0.55 3.49 +/- 0.48 H-32 3.76 +/- 0.44 3.62 +/- 0.36 WSW-10 3.23 +/- 0.16 3.02 +/- 0.30 1 of 13

SL QR 4Q-2018 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/ m³)

Collection Date H08 H12 H14 H30 H34 02-Oct-18 <0.02 <0.02 <0.02 <0.02(A) <0.02 09-Oct-18 <0.02 <0.02 <0.02 (B) <0.02 16-Oct-18 <0.02 <0.02 <0.03 <0.04 <0.02 23-Oct-18 <0.02 <0.02 <0.03 <0.03 <0.02 30-Oct-18 <0.02 <0.02 <0.02 <0.02 <0.02 06-Nov-18 <0.03 <0.03 <0.03 <0.02 <0.03 13-Nov-18 <0.02 <0.02 <0.02 <0.02 <0.02 20-Nov-18 <0.02 <0.02 <0.02 <0.02 <0.02 27-Nov-18 <0.02 <0.02 <0.02 <0.02 <0.02 05-Dec-18 <0.01 <0.01 <0.01 <0.01 <0.02 11-Dec-18 <0.03 <0.03 <0.03 <0.03 <0.03 18-Dec-18 <0.02 <0.02 <0.02 <0.02 <0.02 26-Dec-18 <0.02 <0.02 <0.02 <0.02 <0.02 (A) No power but a near normal collection volume.

(B) Still no power; no sample collection. Power restored 11-Oct-18.

2 of 13

SL QR 4Q-2018 2.b.1. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H08 H12 H14 H30 H34 0.007 +/-

02-Oct-18 0.014 +/- 0.003 0.020 +/- 0.003 0.016 +/- 0.003 0.002(A) 0.017 +/- 0.003 09-Oct-18 0.022 +/- 0.002 0.027 +/- 0.003 0.026 +/- 0.003 (B) 0.021 +/- 0.002 16-Oct-18 0.010 +/- 0.002 0.013 +/- 0.002 0.014 +/- 0.002 0.015 +/- 0.003 0.016 +/- 0.002 23-Oct-18 0.010 +/- 0.002 0.013 +/- 0.002 0.014 +/- 0.002 0.015 +/- 0.003 0.016 +/- 0.002 30-Oct-18 0.023 +/- 0.002 0.027 +/- 0.003 0.025 +/- 0.003 0.015 +/- 0.002 0.023 +/- 0.002 06-Nov-18 0.014 +/- 0.002 0.015 +/- 0.002 0.018 +/- 0.002 0.012 +/- 0.002 0.014 +/- 0.002 13-Nov-18 0.005 +/- 0.002 0.004 +/- 0.002 0.004 +/- 0.002 0.003 +/- 0.001 0.007 +/- 0.002 20-Nov-18 0.014 +/- 0.002 0.015 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 0.013 +/- 0.002 27-Nov-18 0.015 +/- 0.002 0.020 +/- 0.002 0.017 +/- 0.002 0.008 +/- 0.002 0.017 +/- 0.002 05-Dec-18 0.015 +/- 0.002 0.015 +/- 0.002 0.018 +/- 0.002 0.012 +/- 0.002 0.015 +/- 0.002 11-Dec-18 0.007 +/- 0.002 0.011 +/- 0.002 0.012 +/- 0.002 0.005 +/- 0.002 0.009 +/- 0.002 18-Dec-18 0.006 +/- 0.002 0.012 +/- 0.002 0.012 +/- 0.002 0.009 +/- 0.002 0.011 +/- 0.002 26-Dec-18 0.014 +/- 0.002 0.012 +/- 0.002 0.015 +/- 0.002 0.009 +/- 0.002 0.013 +/- 0.002 Average: 0.013 +/- 0.001 0.016 +/- 0.001 0.016 +/- 0.001 0.010 +/- 0.001 0.015 +/- 0.001 (A) No power but a near normal collection volume.

(B) Still no power; no sample collection. Power restored 11-Oct-18.

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 0.1342 +/- 0.0109 <0.0152 <0.0014 <0.0012 <0.0371 H12 0.1614 +/- 0.0116 <0.0247 <0.0013 <0.0013 <0.0424 H14 0.1346 +/- 0.0096 <0.0149 <0.0016 <0.0011 <0.0212 H30 0.1384 +/- 0.0118 <0.0301 <0.0013 <0.0011 <0.0499 H34 0.1485 +/- 0.0098 <0.0137 <0.0015 <0.0012 <0.0212 3 of 13

SL QR 4Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H15 02-Oct-18 <144 382 +/- 27 <3 <3 <7 <3 <8 <6 <5 <3 <4 <6 09-Oct-18 <144 308 +/- 24 <4 <3 <6 <3 <7 <5 <3 <3 <3 <9 16-Oct-18 <153 382 +/- 27 <3 <3 <7 <3 <8 <5 <4 <3 <3 <11 23-Oct-18 <153 399 +/- 27 <3 <3 <8 <4 <8 <6 <4 <3 <3 <6 30-Oct-18 <144 335 +/- 26 <3 <3 <8 <3 <9 <6 <3 <3 <4 <12 06-Nov-18 <144 360 +/- 26 <3 <3 <6 <4 <8 <5 <3 <3 <4 <10 13-Nov-18 <133 429 +/- 28 <3 <3 <8 <4 <8 <6 <4 <3 <3 <6 20-Nov-18 <144 344 +/- 26 <3 <3 <7 <3 <8 <6 <3 <3 <4 <11 27-Nov-18 <143 368 +/- 26 <3 <4 <9 <4 <8 <5 <4 <3 <4 <8 05-Dec-18 <142 452 +/- 40 <6 <7 <14 <7 <12 <11 <8 <6 <7 <10 11-Dec-18 <142 376 +/- 40 <6 <6 <15 <7 <15 <11 <9 <5 <6 <8 18-Dec-18 <142 407 +/- 28 <3 <4 <7 <4 <7 <6 <4 <3 <3 <8 26-Dec-18 <143 386 +/- 27 <3 <3 <6 <4 <7 <6 <4 <3 <3 <9 H59 11-Oct-18 <153 398 +/- 38 <6 <5 <11 <7 <13 <10 <6 <5 <6 <17 13-Nov-18 <133 374 +/- 27 <3 <3 <8 <3 <8 <6 <2 <3 <3 <7 11-Dec-18 <142 327 +/- 25 <3 <3 <8 <4 <10 <6 <6 <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.

4 of 13

SL QR 4Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

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

H59 This sample was previously collected.

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

Sample Collection Site Date K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Ra-226 Ra-228 H15 24-Dec-18 1659 +/- 166 <25 <27 <48 <27 <43 <22 <23 <425 <115 H59 27-Nov-18 1717 +/- 140 <22 <22 <34 <16 <44 <20 <24 <458 <98 4.a.2. FISH - Mixed Species - (pCi/kg, wet weight)

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

H59 This sample was previously collected.

5 of 13

SL QR 4Q-2018 4.b. BROADLEAF VEGETATION - Brazilian Pepper - (pCi/kg, wet weight)

Sample Collection Site Date Be-7 K-40 I-131 Cs-134 Cs-137 Pb-210 Pb-212 Ra-226 Ra-228 H51 11-Oct-18 1255 +/- 51 2586 +/- 113 <9 <7 6+/-2 300 +/- 82 16 +/- 3 <197 <33 13-Nov-18 592 +/- 54 4968 +/- 223 <14 <12 <15 <1012 26 +/- 8 <301 <69 11-Dec-18 419 +/- 55 5934 +/- 254 <15 <13 <17 <1076 28 +/- 9 <331 <70 H52 11-Oct-18 1039 +/- 62 3547 +/- 169 <12 <11 <13 <869 13 +/- 6 <252 <58 13-Nov-18 450 +/- 31 3863 +/- 150 <9 <8 <9 <339 30 +/- 4 <194 <37 11-Dec-18 2297 +/- 79 4114 +/- 161 <11 <9 <11 539 +/- 97 <23 <236 <44 H59 11-Oct-18 1546 +/- 56 3917 +/- 147 <9 <7 <9 <346 20 +/- 4 <179 <33 13-Nov-18 689 +/- 56 3157 +/- 173 <15 <12 <16 <1139 31 +/- 8 <310 <66 11-Dec-18 714 +/- 39 2691 +/- 118 <9 <7 <10 235 +/- 63 14 +/- 4 <204 <37 6 of 13

SL QR 4Q-2018 ST. LUCIE SITE Supplemental Sampling Fourth Quarter, 2018 Number of Sample Type Collection Frequency Locations Sampled Samples

1. Direct Radiation Quarterly 9 18
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 Crops Annually 1 0 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.

7 of 13

SL QR 4Q-2018

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

Sample Deployment 11-Sep-18 Site Collection 05-Dec-18 Old New H08 4.06 +/- 0.23 4.03 +/- 0.05 H09 4.10 +/- 0.11 3.86 +/- 0.08 H12 8.05 +/- 0.65 7.71 +/- 1.10 H14 4.24 +/- 0.24 4.10 +/- 0.22 H33 3.92 +/- 0.26 3.56 +/- 0.19 H34 3.89 +/- 0.26 3.67 +/- 0.39 H60 3.76 +/- 0.15 3.70 +/- 0.20 H61 4.85 +/- 0.34 5.08 +/- 0.18 H62 4.35 +/- 0.50 4.06 +/- 0.27 2.a. IODINE-131 IN WEEKLY AIR CARTRIDGES - (pCi/m³)

Collection Date H09 H32 H33 02-Oct-18 <0.02 <0.02 <0.02 09-Oct-18 <0.02 <0.02 <0.02 16-Oct-18 <0.02 <0.02 <0.02 23-Oct-18 <0.02 <0.02 <0.02 30-Oct-18 <0.02 <0.02 <0.02 06-Nov-18 <0.03 <0.03 <0.03 13-Nov-18 <0.02 <0.02 <0.02 20-Nov-18 <0.02 <0.02 <0.02 27-Nov-18 <0.02 <0.02 <0.02 05-Dec-18 <0.01 <0.02 <0.01 11-Dec-18 <0.03 <0.03 <0.03 18-Dec-18 <0.02 <0.02 <0.02 26-Dec-18 <0.02 <0.02 <0.02 8 of 13

SL QR 4Q-2018 2.b. AIR PARTICULATES - GROSS BETA - (pCi/m³)

Collection Date H09 H32 H33 02-Oct-18 0.017 +/- 0.003 0.016 +/- 0.003 0.017 +/- 0.003 09-Oct-18 0.018 +/- 0.002 0.023 +/- 0.002 0.021 +/- 0.002 16-Oct-18 0.009 +/- 0.002 0.013 +/- 0.002 0.011 +/- 0.002 23-Oct-18 0.016 +/- 0.002 0.016 +/- 0.002 0.011 +/- 0.002 30-Oct-18 0.023 +/- 0.002 0.025 +/- 0.003 0.025 +/- 0.002 06-Nov-18 0.016 +/- 0.002 0.016 +/- 0.002 0.014 +/- 0.002 13-Nov-18 0.004 +/- 0.002 0.007 +/- 0.002 0.006 +/- 0.002 20-Nov-18 0.014 +/- 0.002 0.016 +/- 0.002 0.009 +/- 0.002 27-Nov-18 0.014 +/- 0.002 0.018 +/- 0.002 0.014 +/- 0.002 05-Dec-18 0.020 +/- 0.002 0.015 +/- 0.002 0.019 +/- 0.002 11-Dec-18 0.013 +/- 0.002 0.015 +/- 0.003 0.013 +/- 0.003 18-Dec-18 0.008 +/- 0.002 0.010 +/- 0.002 0.009 +/- 0.002 26-Dec-18 0.017 +/- 0.002 0.017 +/- 0.002 0.018 +/- 0.002 Average: 0.015 +/- 0.001 0.016 +/- 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 0.1726 +/- 0.0106 <0.0137 <0.0015 <0.0013 0.0155 +/- 0.0039 H32 0.1448 +/- 0.0096 <0.0147 <0.0014 <0.0011 0.0283 +/- 0.0050 H33 0.1490 +/- 0.0114 <0.0268 <0.0014 <0.0013 <0.0418 9 of 13

SL QR 4Q-2018 3.a. SURFACE WATER - (pCi/L)

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

H13 11-Oct-18 <153 263 +/- 23 <4 <3 <7 <3 <8 <5 <4 <3 <3 <12 13-Nov-18 <133 320 +/- 25 <3 <3 <8 <4 <7 <5 <4 <4 <3 <8 11-Dec-18 <142 360 +/- 26 <3 <3 <8 <4 <7 <6 <6 <3 <4 <5 H36 11-Oct-18 <153 311 +/- 24 <3 <3 <6 <3 <7 <5 <4 <4 <3 <11 13-Nov-18 <133 370 +/- 26 <3 <4 <8 <3 <7 <6 <4 <3 <4 <6 11-Dec-18 <142 432 +/- 40 <6 <5 <13 <7 <12 <10 <10 <6 <6 <11 (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.

10 of 13

SL QR 4Q-2018 3.b. SHORELINE SEDIMENT - (pCi/kg, dry weight)

Sample Collection Site Date Be-7 K-40 Co-58 Co-60 Cs-134 Cs-137 Pb-210 Ra-226 Th-232 U-235 U-238 H13 This sample was previously collected.

H16 This sample was previously collected.

H19 This sample was previously collected.

H36 This sample was previously collected.

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

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

H16 This sample was previously collected.

H19 This sample was previously collected.

11 of 13

SL QR 4Q-2018 3.d. GROUND WATER (pCi/L)

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

H70 18-Oct-18 142 +/- 27 <110 <6 <6 <10 <7 <12 <10 <8 <5 <6 <10 H71 18-Oct-18 332 +/- 53 331 +/- 26 <3 <4 <8 <4 <8 <6 <5 <4 <4 <5 H72 18-Oct-18 <144 383 +/- 39 <6 <7 <13 <7 <15 <10 <9 <5 <7 <9 H73 18-Oct-18 <144 89 +/- 14 <3 <3 <7 <3 <8 <6 <5 <4 <4 <5 H74 18-Oct-18 <153 346 +/- 36 <5 <6 <12 <6 <16 <11 <9 <5 <7 <8 H75 18-Oct-18 <153 342 +/- 36 <7 <7 <14 <5 <13 <9 <10 <5 <7 <10 H76 18-Oct-18 <144 <44 <3 <3 <7 <4 <8 <5 <6 <3 <3 <5 H77 18-Oct-18 <144 <79 <7 <6 <14 <6 <11 <12 <9 <5 <6 <10 H78 18-Oct-18 <144 53 +/- 12 <3 <3 <7 <3 <8 <6 <6 <3 <4 <6 H79 18-Oct-18 <153 <100 <5 <6 <12 <6 <11 <10 <9 <6 <6 <10 (A) - These tabulated LLD values for Zr/Nb-95 are the higher of the individual parent or daughter LLDs.

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

12 of 13

SL QR 4Q-2018 4.a. GARDEN CROPS - (pCi/kg, wet weight)

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

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

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

13 of 13

DOE-MAPEP 38 RESULTS ERA-RadCheM/MRaD Proficiency Test Radionuclide Result Ref. Flag Acceptance Value (Evaluation) Range Matrix: RdF Air Filter (Bq/filter)

MN54 1.106 1.03 A 0.72-1.34 CO57 1.126 1.18 A 0.83-1.53 CO60 0.007 A False Positive Test (within acceptance range)

ZN65 1.473 1.33 A 0.93-1.73 CS134 0.657 0.675 A 0.473-0.878 CS137 0.006 A False Positive Test (within acceptance range)

Matrix: GrF Air Filter (Bq/filter) - (No MAPEP Gross Beta, Unknown from ERA MRAD-258PT Program)

Gross Beta 50.8 52.0 A 31.5-78.6 Matrix: MaS Soil (Bq/kg)

K40 578.43 577 A 404-750 MN54 1044.29 1010 A 707-1313 CO57 823.86 826 A 578-1074 CO60 548.57 560 A 392-728 ZN65 1025.71 960 A 672-1248 CS134 0.61 A False Positive Test (within acceptance range)

CS137 4.73 4.6 A Sensitivity Evaluation Matrix: MaW Water (Bq/L)

H3 -0.336 0 A False Positive Test (within acceptance range)

MN54 0.005 0 A False Positive Test (within acceptance range)

CO57 -0.011 0 A False Positive Test (within acceptance range)

CO60 11.410 11.5 A 8.1-15.0 ZN65 15.360 14.3 A 10.0-18.6 CS134 9.478 10.2 A 7.1-13.3 CS137 12.450 12.2 A 8.5-15.9

Matrix: RdV Vegetation (Bq/sample)

MN54 2.578 2.66 A 1.86-3.46 CO57 4.459 4.42 A 3.09-5.75 CO60 2.138 2.29 A 1.60-2.98 ZN65 0.143 0 A False Positive Test (within acceptance range)

CS134 2.998 3.23 A 2.26-4.20 CS137 3.616 3.67 A 2.57-4.77 Evaluation : A = Acceptable, W = Acceptable with Warning, N = Not Acceptable In MAPEP 38, the results for gamma on air filters, water, soil, and vegetation matrices for those nuclides associated with nuclear power plant operation and using analytical methods used in the REMP are acceptable. There are no relevant data flags.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 ATTACHMENT D Industry Initiative Ground Water Protection Program Tritium in Ground Water Monitoring 2018

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 A. Description of Program:

Quarterly sampling & analysis for Tritium & principle gamma emitters is performed by the State of Florida Department of Health (DOH) and Bureau of Radiation Control (BRC), pursuant to an Agreement between FPL and DOH, as part of the ODCM REMP sampling program.

The wells identified for radiological environmental sampling in support of the industry initiative are listed below, and in Appendix B-2 of the ODCM. The ten wells are on the outside perimeter of the protected area. Two locations where the Plant ID ends with S are shallower wells adjacent, within a few feet, of 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 LU bldg H78 H78 South of North Warehouse H79 H79 West of A1A and East of Parking Lot B. St. Lucie 2018 Tritium Results (1) Summary, pCi/L Well number 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter H70 <161 <158 <143 142 H71 560 374 441 332 H72 <161 <158 <137 <144 H73 <161 <146 <143 <144 H74 <161 <158 <147 <153 H75 <161 <146 <147 <153 H76 <161 <159 <147 <144 H77 <159 <158 <147 <144 H78 <159 <158 <147 <144 H79 <159 <158 <147 <153 Notes

1. Samples analyzed for H3 and principle gamma emitters; tritium is the only fission product identified.

Naturally occurring K-40 is occasionally identified.

2. Laboratory H3 MDA is about 150 pCi/liter Map depicting the well locations follows.

2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ST. LUCIE PLANT - UNITS 1 & 2 RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS IN SUPPORT OF THE INDUSTRY INITIATIVE