L-MT-25-019, 2024 Annual Radiological Environmental Operating Report
| ML25132A075 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 05/10/2025 |
| From: | Brown G Northern States Power Company, Minnesota, Xcel Energy |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| L-MT-25-019 | |
| Download: ML25132A075 (1) | |
Text
(l Xcel Energy*
May 10, 2025 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Monticello Nuclear Generating Plant Docket No. 50-263 Subsequent Renewed Facility Operating License No. DPR-22 2024 Annual Radiological Environmental Operating Report 2807 West County Road 75 Monticello, MN 55362 L-MT-25-019 10 CFR 50, Appendix I Pursuant to 10 CFR 50, Appendix I, Section IV.B.2, IV.B.3, IV.C and, in accordance with Monticello Nuclear Generating Plant (MNGP) Technical Specifications 5.6.1, the Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy, is submitting the following enclosure:
Annual Radiological Environmental Operating Report, under MNGP's "Radiological Environmental Monitoring Program," for year 2024. (Enclosure)
Summary of Commitments This letter makes no new commitments and no revisions to existing commitments.
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Gregory D. Brown Plant Manager, Monticello Nuclear Generating Plant Northern States Power Company - Minnesota Enclosure cc:
Administrator, Region Ill, USNRC Project Manager, Monticello, USNRC Resident Inspector, Monticello, USNRC Minnesota Department of Commerce
ENCLOSURE RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM JANUARY 1 - DECEMBER 31, 2024 187 Pages Follow
Monticello Nuclear Generating Plant 2024 Annual Radiological Environmental Operating Report
Annual Radiological Environmental Operating Report YEAR: 2024 Page 1 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant TABLE OF CONTENTS 1.0 LIST OF ACRONYMS AND DEFINITIONS................................................................................ 3 2.0 EXECUTIVE
SUMMARY
............................................................................................................ 4 2.1 Summary of
Conclusions:
............................................................................................... 5
3.0 INTRODUCTION
........................................................................................................................ 6 4.0 SITE DESCRIPTION AND SAMPLE LOCATIONS..................................................................... 7 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM REQUIREMENTS................ 8 6.0 MAPS OF COLLECTION SITES.............................................................................................. 18 7.0 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES................................................................................................. 23 8.0 SAMPLING PROGRAM, PROGRAM MODIFICATION AND INTEPRETATION OF RESULTS................................................................................................................................ 24 8.1 Environmental Direct Radiation Dosimetry Results....................................................... 25 8.2 Air Particulate and Radioiodine Sample Results........................................................... 26 8.3 Waterborne Sample Results......................................................................................... 27 8.4 Ingestion Pathway Sample Results............................................................................... 31 9.0 LAND USE CENSUS............................................................................................................... 32 10.0 SAMPLE DEVIATIONS, ANOMALIES AND UNAVAILABILITY................................................ 34 11.0 OTHER SUPPLEMENTAL INFORMATION............................................................................. 36 11.1 NEI 07-07 Onsite Radiological Groundwater Monitoring Program................................. 36 11.2 Independent Spent Fuel Storage Installation (ISFSI) Monitoring Program.................... 37 11.3 Corrections to Previous Reports................................................................................... 37 12.0 BIBLIOGRAPHY...................................................................................................................... 38 TABLES Table 1, Radiological Environmental Monitoring Program - Direct Radiation......................................... 8 Table 2, Radiological Environmental Monitoring Program - Airborne..................................................... 9 Table 3, Radiological Environmental Monitoring Program - Waterborne............................................. 10 Table 4, Radiological Environmental Monitoring Program - Ingestion.................................................. 12 Table 5, REMP Sampling Locations - Direct Radiation........................................................................ 14 Table 6, Reporting Levels for Radioactivity Concentrations in Environmental Samples....................... 23 Table 7, Maximum Values for the Limit of Detection............................................................................ 24 Table 8: Land Use Census - Nearest Receptors within 5 miles........................................................... 34 Table 9: Sample Deviation Summary................................................................................................... 35 Table 10: Airborne Cartridge: Radioiodine (pCi/m3)............................................................................. 48 Table 11: Airborne Particulates: Gross Beta (pCi/m3).......................................................................... 52 Table 12: Quarterly Gamma Isotopic Data - Air Station M-1 (pCi/m3)................................................. 55 Table 13: Quarterly Gamma Isotopic Data - Air Station M-2 (pCi/m3)................................................. 56 Table 14: Quarterly Gamma Isotopic Data - Air Station M-3 (pCi/m3)................................................. 57 Table 15: Quarterly Gamma Isotopic Data - Air Station M-4 (pCi/m3)................................................. 58 Table 16: Quarterly Gamma Isotopic Data - Air Station M-5 (pCi/m3)................................................. 59 Table 17: Sediment Gamma Isotopic Data - M-8c Upstream of Plant (pCi/kg).................................... 60
Annual Radiological Environmental Operating Report YEAR: 2024 Page 2 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 18: Sediment Gamma Isotopic Data - M-9 Downstream of Plant (pCi/kg).................................. 61 Table 19: Sediment Gamma Isotopic Data - M-15 Montissippi Park (pCi/kg)...................................... 62 Table 20: Tissue-Fish Gamma Isotopic Data - M-8c Upstream of Plant (pCi/kg, wet)......................... 63 Table 21: Tissue-Fish Gamma Isotopic Data - M-9 Downstream of Plant (pCi/kg, wet)....................... 64 Table 22: Tissue-Plant Gamma Isotopic Data - M-41 Training Center (pCi/kg)................................... 65 Table 23: Tissue-Plant Gamma Isotopic Data - M-42 Biology Station Road (pCi/kg)........................... 66 Table 24: Tissue-Plant Gamma Isotopic Data - M-43c Imholte Farm (pCi/kg)..................................... 67 Table 25: Water Tritium Data (pCi/kg).................................................................................................. 68 Table 26: Drinking Water Gross Beta Data (pCi/kg)............................................................................. 69 Table 27: Groundwater Gamma Isotopic Data - M-11 City of Monticello (pCi/m3)............................... 70 Table 28: Groundwater Gamma Isotopic Data - M-12 Plant Well #11 (pCi/m3)................................... 71 Table 29: Groundwater Gamma Isotopic Data - M-43c Imholte Farm (pCi/m3)................................... 72 Table 30: Groundwater Gamma Isotopic Data - M-55 Hasbrouck Residence (pCi/m3)....................... 73 Table 31: Drinking Water Gamma Isotopic Data - M-14 City of Minneapolis....................................... 74 Table 32: Surface Water Gamma Isotopic Data - M-8c Upstream of Plant.......................................... 75 Table 33: Surface Water Gamma Isotopic Data - M-9 Downstream of Plant....................................... 77 Table 34: Direct Radiation Data - TLD: Gamma (mrem/91 day).......................................................... 78 Table 35: Direct Radiation Data - ISFSI: Gamma (mrem/91 day)........................................................ 81 FIGURES Figure 1, Potential exposure pathways to Members of the Public due to Plant Operations [7]............... 6 Figure 2, REMP Sample Locations (Surface Water, Sediment, Well Water, Air, and Vegetation)........ 18 Figure 3, REMP Sample Locations (5 Mile Ring and Special Interest TLD Locations)......................... 19 Figure 4, REMP Sample Locations (Site Boundary TLD Locations)..................................................... 20 Figure 5, REMP Sample Locations (Control Locations)....................................................................... 21 Figure 6, REMP Sample Locations (ISFSI TLD Locations).................................................................. 22 Figure 7, Air Particulate: Analysis for Gross Beta, Average for All Indicator vs. Control Locations....... 27 Figure 8: Surface Water Tritium Results.............................................................................................. 28 Figure 9: REMP Groundwater Tritium Sample Results........................................................................ 29 Figure 10: Drinking Water Gross Beta Samples Control...................................................................... 30 Figure 11: Drinking Water Tritium Sample Results............................................................................... 30 ATTACHMENTS, Data Table Summary.................................................................................................... 40, Complete Data Table for All Analysis Results Obtained In 2024................................... 48, Cross Check Intercomparison Program......................................................................... 82, Environmental Direct Radiation Dosimetry Results....................................................... 83, Laboratory Quality Assurance Reports (Enclosed)........................................................ 85
Annual Radiological Environmental Operating Report YEAR: 2024 Page 3 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 1.0 LIST OF ACRONYMS AND DEFINITIONS
- 1.
Airborne Activity Sampling: Continuous sampling of air through the collection of particulates and radionuclides on filter media.
- 2.
ARERR: Annual Radioactive Effluent Release Report
- 3.
AREOR: Annual Radiological Environmental Operating Report
- 4.
BWR: Boiling Water Reactor
- 5.
Composite Sample: A series of single collected portions (aliquots) analyzed as one sample. The aliquots making up the sample are collected at time intervals that are very short compared to the composite period.
- 6.
Control: A sampling station in a location not likely to be affected by plant effluents due to its distance and/or direction from the station.
- 7.
Curie (Ci): A measure of radioactivity; equal to 3.7 x 1010 disintegrations per second, or 2.22 x 1012 disintegrations per minute.
- 8.
Direct Radiation Monitoring: The measurement of radiation dose at various distances from the plant is assessed using Thermoluminescent Dosimeters (TLD), Optically Stimulated Luminescence Dosimeters (OSLD) and pressurized ionization chambers.
- 9.
EPA: Environmental Protection Agency
- 10.
GPI: Groundwater Protection Initiative
- 11.
Grab Sample: A single discrete sample drawn at one point in time.
- 12.
Indicator: A sampling location that is likely to be affected by plant effluents due to its proximity and/or direction from the plant.
- 13.
Ingestion Pathway: The ingestion pathway includes milk, fish, drinking water and garden produce. Also sampled (under special circumstances) are other media such as vegetation or animal products when additional information about particular radionuclides is needed.
- 14.
ISFSI: Independent Spent Fuel Storage Installation
- 15.
Lower Limit of Detection (LLD): An a priori measure of the detection capability of a radiochemistry measurement based on instrument setup, calibration, background, decay time, and sample volume. An LLD is expressed as an activity concentration. The MDA is used for reporting results. LLD are specified by a regulator, such as the NRC and are typically listed in the ODCM.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 4 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
- 16.
MDA: Minimum Detectable Activity. For radiochemistry instruments, the MDA is the a posteriori minimum concentration that a counting system detects. The smallest concentration or activity of radioactive material in a sample that will yield a net count above instrument background and that is detected with 95%
probability, with only five % probability of falsely concluding that a blank observation represents a true signal.
- 17.
MDC: Minimum Detectable Concentration. Essentially synonymous with MDA for the purposes of radiological monitoring.
- 18.
Mean: The sum of all of the values in a distribution divided by the number of values in the distribution, synonymous with average.
- 19.
Microcurie: 3.7 x 104 disintegrations per second, or 2.22 x106 disintegrations per minute.
- 20.
N/A: Not Applicable
- 21.
NEI: Nuclear Energy Institute
- 22.
NIST: National Institute of Standards and Technology.
- 23.
NRC: Nuclear Regulatory Commission
- 24.
ODCM: Offsite Dose Calculation Manual
- 25.
OSLD: Optically Stimulated Luminescence Dosimeter
- 26.
pCi/L: picocuries / Liter
- 27.
PWR: Pressurized Water Reactor
- 28.
REMP: Radiological Environmental Monitoring Program
- 29.
TLD: Thermoluminescent Dosimeter 2.0 EXECUTIVE
SUMMARY
Monticello Nuclear Generating Plant (MNGP) Radiological Environmental Monitoring Program (REMP) was established prior to the station becoming operational to provide information on background radiation present in the area. The goal of MNGP REMP is to evaluate the impact of the station on the environment. Environmental samples from different media are monitored as part of the program in accordance with specifications detailed in the Offsite Dose Calculation Manual (ODCM), provisions of NRCs NUREG-1302, NRC Generic Letter 79-65 Branch Technical Position, and MNGP Technical Specifications. The program compares data from Indicator locations near the plant, to Control locations farther away from the site to assess operation impacts.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 5 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant The Annual Radiological Environmental Operating Report (AREOR) provides data obtained through analyses of environmental samples collected at MNGP for the reporting period of January 1st through December 31st, 2024. During that time period 1944 analyses were performed on 821 samples. In assessing all the data gathered for this report and comparing these results with preoperational data and/or 10-year average values, it was concluded that the operation of MNGP did not result in detection of plant related radionuclides in the environment.
2.1 Summary of
Conclusions:
No measurable activities above background levels were detected. All values were consistent with historical results which indicate no adverse radiological environmental impacts associated with the operation of MNGP. Naturally occurring radionuclides are present in the Earth's crust and atmosphere and exists in detectable quantities throughout the world. It is common to detect naturally occurring radionuclides in many of the samples collected for REMP. Some examples of naturally occurring radionuclides that are frequently seen in samples are potassium-40, beryllium-7, actinium-228 (present as a decay product of radium-228), and radium-226.
Additionally, some relatively long-lived anthropogenic radioisotopes, such as strontium-90 and cesium-137, are also seen in some REMP samples; these radionuclides exist in measurable quantities throughout the world as a result of fallout from historic atmospheric nuclear weapons testing. Naturally occurring beryllium-7 and potassium-40 were detected in sediments as part of MNGPs REMP program.
Detailed information on the exposure of the U.S. population to ionizing radiation can be found in NCRP Report No. 160 [1].
Annual Radiological Environmental Operating Report YEAR: 2024 Page 6 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
3.0 INTRODUCTION
The Radiological Environmental Monitoring Program (REMP) provides data on measurable levels of radiation and radioactive materials in the environment. This program also evaluates the relationship between quantities of radioactive materials released from the plant and resultant doses to individuals from principal pathways of exposure. In this capacity, REMP provides a check on the effluent release program and dispersion modeling to ensure that concentrations in the environment due to radioactive effluents conform to the As Low As (is) Reasonably Achievable (ALARA) design objectives of 10 CFR 50, Appendix I [2], and implements the requirements of Section IV.B.2 and IV.B.3 of Appendix I. REMP is designed to conform to the Nuclear Regulatory Commission (NRC) Regulatory Guide 4.1 [3], NUREG 1301/1302
[4] [5], and the 1979 NRC Branch Technical Position [6].
Figure 1, Potential exposure pathways to Members of the Public due to Plant Operations [7]
Quality assurance aspects of the sampling program and TLD/OSLD data collection are conducted in accordance with Regulatory Guides 4.15 [8] and 4.13 [9]. REMP also adheres to the requirements of the State of Minnesota, MNGP Technical Specifications, and Offsite Dose Calculation Manual (ODCM). These governing documents dictate the environmental sampling, sample analysis protocols, data reporting and quality assurance requirements for the environmental monitoring program.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 7 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant The Annual Radiological Environmental Operating Report provides summaries of the environmental data from exposure pathways, interpretations of the data, and analyses of trends of the results. Routinely monitored pathways include ingestion, inhalation, and direct radiation. Routes of exposure are based on site specific information such as meteorology, receptor locations, and water usage around the plant.
4.0 SITE DESCRIPTION AND SAMPLE LOCATIONS Monticello Nuclear Generating Plant is a commercial nuclear power plant that achieved initial criticality in 1971. Located in Wright County, Minnesota, MNGP is located along the Mississippi River and is approximately 40 miles northwest of the Twin Cities of Minneapolis and St. Paul. MNGP generates commercial electrical power via a boiling water reactor with a nominal generating capacity of 681 megawatts electric (MWe).
MNGP sampling media are selected based on site specific information such as meteorology, receptor locations, and water usage around the plant. Sampling and analysis frequencies are documented in the Offsite Dose Calculation Manual and site procedures. Required sampling, analysis frequencies and location of sample collected are captured in the following tables and figures:
Table 1, Radiological Environmental Monitoring Program - Direct Radiation Table 2, Radiological Environmental Monitoring Program - Airborne Table 3, Radiological Environmental Monitoring Program - Waterborne Table 4, Radiological Environmental Monitoring Program - Ingestion Table 5, REMP Sampling Locations - Direct Radiation Figure 2, REMP Sample Locations (Surface Water, Sediment, Well Water, Air, and Vegetation)
Figure 3, REMP Sample Locations (5 Mile Ring and Special Interest TLD Locations)
Figure 4, REMP Sample Locations (Site Boundary TLD Locations)
Figure 5, REMP Sample Locations (Control Locations)
Figure 6, REMP Sample Locations (ISFSI TLD Locations)
Annual Radiological Environmental Operating Report YEAR: 2024 Page 8 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM REQUIREMENTS Table 1, Radiological Environmental Monitoring Program - Direct Radiation Requirement Sample Location Description, Distance, and Direction Sampling Collection/
Frequency Type and Frequency of Analyses Direct Radiation 40 Routine monitoring stations with two or more dosimeters placed as follows:
An inner ring of stations, using the 16 meteorological sectors as guidelines, in the general area of the site boundary.1 An outer ring of stations, one in each compass sector at approximately 5 miles from the site; and Special interest areas, such as population centers, nearby recreation areas, and control stations.2 Three neutron and gamma dosimeter sets along the OCA fence. Three neutron and gamma dosimeters with special interest and inner ring TLDs and four neutron control dosimeters are stationed with the REMP control TLDs.
See Table 5 Quarterly Gamma/Neutron dose/Quarterly 1 Because of inaccessibility, two sectors in the inner ring are not covered.
2 Three control TLD locations only have one dosimeter.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 9 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 2, Radiological Environmental Monitoring Program - Airborne Requirement Sample Location Description, Distance, and Direction Sampling Collection/
Frequency Type and Frequency of Analyses Airborne Radioiodine and Particulates Samples from 5 locations:
Three locations close to the site boundary in different sectors of the highest calculated annual average ground level D/Q.
One sample from the vicinity of a community having the highest calculated annual average D/Q.
One sample from a Control Location, approximately 10 to 20 miles away in the least predominant wind direction Station M-1c: 11 miles 307 degrees Station M-2: 0.8 miles 140 degrees Station M-3: 0.6 miles 104 degrees Station M-4: 0.8 miles 147 degrees Station M-5: 2.6 miles 134 degrees Continuous sampler operation with sample collection weekly Particulate sampler: Analyze for gross beta radioactivity 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following filter change /
Weekly. Perform gamma isotopic analysis on each sample when gross beta activity is > 10 times the yearly mean of control samples.
Perform gamma isotopic analysis on composite sample (by location)/Quarterly.
Radioiodine canister: I-131 analysis/Weekly.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 10 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 3, Radiological Environmental Monitoring Program - Waterborne Requirement Sample Location Description, Distance, and Direction Sampling Collection/
Frequency Type and Frequency of Analyses Surface Water One sample upstream (control) and one sample downstream (indicator)
Station M-8c: 1,000 ft upstream of Plant intake Station M-9: 1,000 ft downstream of Plant discharge Monthly composite of weekly samples (water and ice conditions permitting); samples from monthly composites are combined to form quarterly composite samples to be analyzed for H-3.
Gamma isotopic /Monthly, H-3 /Quarterly Drinking Water One sample of the City of Minneapolis water supply Station M-14: City of Minneapolis 37 miles 132 degrees Composite sample over 2-week period when I-131 is performed; monthly composite otherwise.
I-131 /on each composite when dose calculated for consumption of the water is >1 mrem/year3
/Bi-weekly, Gross beta and gamma
/Monthly, H-3 /Quarterly Groundwater One control location greater than 10 miles from the plant and three indicator locations within 5 miles of the plant.
Station M-43c: Imholte Farm 12.3 miles 313 degrees Station M-11: City of Monticello 3.3 miles 127 degrees Station M-12: Plant Well No. 11 0.26 miles 252 degrees Station M-55: Hasbrouck Residence 1.60 miles 255 degrees Grab samples quarterly Gamma isotopic and H-3
/Quarterly 3 The dose shall be calculated for the maximum organ and age group, using the methodology and parameters in the ODCM.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 11 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 3, Radiological Environmental Monitoring Program - Waterborne Requirement Sample Location Description, Distance, and Direction Sampling Collection/
Frequency Type and Frequency of Analyses Sediment from Shoreline One sample upstream (control),
one sample downstream (indicator), and one sample from the shoreline of the recreational area (indicator).
Station M-8c: Upstream of plant within 1,000 ft of plant intake Station M-9: Downstream of plant within 1,000 ft of plant discharge Station M-15: Montissippi Park 1.27 miles 114 degrees Semiannual Gamma isotopic /Semiannually
Annual Radiological Environmental Operating Report YEAR: 2024 Page 12 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 4, Radiological Environmental Monitoring Program - Ingestion Requirement Sample Location Description, Distance, and Direction Sampling Collection/
Frequency Type and Frequency of Analyses Milk:
One sample from milking animals in three locations within 3 miles distance having the highest dose potential. If there are none, then one sample from milking animals in each of three areas between 3 to 5 miles distant where doses are calculated to be greater than 1 mrem per yr.4 One sample from milking animals at a control location 10 to 20 miles distant and in the least prevalent wind direction.
This pathway is currently unavailable at MNGP.
Biweekly when animals are on pasture; monthly at other times Gamma isotopic and I-131 analysis/ Biweekly when animals are on pasture; monthly at other times Vegetation:5 Samples of vegetation grown closest to each of the two offsite locations of highest predicted annual average D/Q if milk sampling is not performed, and one sample from 10 to 20 miles in the least prevalent wind direction Station M-41: Training center near 0.8 miles 151 degrees Station M-42:6 Biology station road near 0.7 miles 136 degrees Station M-42A: near 0.7 miles 108 degrees Station M-43c: Imholte farm near 12.3 miles 313 degrees Monthly during growing season Gamma Isotopic and Iodine-131 analysis/ Each sample 4 The dose shall be calculated for the maximum organ and age group, using the methodology and parameters in the ODCM.
5 Actual location for vegetation sampling may vary depending on availability of broad leaf plant species. The nearest available broad leaf specimens to the location should be used.
6 M-42 is the preferred sampling location; however, M-42A may be used in place of M-42, if samples are not available at the preferred location.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 13 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 4, Radiological Environmental Monitoring Program - Ingestion Requirement Sample Location Description, Distance, and Direction Sampling Collection/
Frequency Type and Frequency of Analyses Fish:
One sample of one game specie of fish located upstream and downstream of the plant site.
Station M-8c: Upstream of plant within 1,000 ft of plant intake.
Station M-9: Downstream of plant within 1,000 ft of plant discharge.
Semiannually Gamma isotopic analysis on edible portions/ Each sample Food Products:7 One sample of corn and potatoes from any area that is irrigated by water in which liquid plant wastes have been discharged.8 This pathway is currently unavailable at MNGP since there are not any crops irrigated from the Mississippi River within 5 miles downstream from MNGP.
At time of harvest Gamma isotopic analysis of edible portion/ Each sample 7 Collected only if Plant discharges radioactive effluent into the river, then only from river irrigated fields, as determined by Section 2.1 of the ODCM 07.01.
8 As determined by methods outlined in Section 2.3 of the ODCM 07.01.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 14 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 5, REMP Sampling Locations - Direct Radiation Site #9 Location Type Sector Distance Description M01A Inner Ring N
0.75 Sherburne Ave. So.
M02A Inner Ring NNE 0.79 Sherburne Ave. So.
M03A Inner Ring NE 1.29 Sherburne Ave. So.
M04A Inner Ring E
0.5 Biology Station Rd.
M05A Inner Ring ESE 0.48 Biology Station Rd.
M06A Inner Ring SE 0.54 Biology Station Rd.
M07A Inner Ring SSE 0.43 Parking Lot H M08A Inner Ring S
0.45 Parking Lot F M09A Inner Ring SSW 0.38 County Road 75 M10A &
ISFSI-15 (neutron)
Inner Ring SW 0.38 County Road 75 M11A Inner Ring WSW 0.4 County Road 75 M12A &
ISFSI-14 (neutron)
Inner Ring W
0.5 County Road 75 9 Code letters are defined below:
A = Locations in the general area of the site boundary B = Locations about 4 to 5 miles distant from MNGP C = Locations of control samples (used for control air sampler and water control sample)
S = Special interest locations
Annual Radiological Environmental Operating Report YEAR: 2024 Page 15 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 5, REMP Sampling Locations - Direct Radiation Site #9 Location Type Sector Distance Description M13A Inner Ring NW 0.89 North Boundary Rd.
M14A Inner Ring NNW 0.78 North Boundary Rd.
M01B Outer Ring N
4.65 117th Street M02B Outer Ring NNE 4.4 County Road 11 M03B Outer Ring NE 4.3 County Rd. 73 & 81 M04B Outer Ring ENE 4.2 County Rd. 73 (196th Street)
M05B Outer Ring E
4.3 City of Big Lake M06B Outer Ring ESE 4.3 County Rd 14 & 196th Street M07B Outer Ring SE 4.3 Monticello Industrial Dr.
M08B Outer Ring SSE 4.6 Residence Hwy 25 & Davidson Ave M09B Outer Ring S
4.7 Weinand Farm M10B Outer Ring SSW 4.2 Reisewitz Farm - Acacia Ave M11B Outer Ring SW 4.0 Vanlith Farm - 97th Ave M12B Outer Ring WSW 4.2 Lake Maria St. Park M13B Outer Ring W
4.1 Bridgewater Sta.
M14B Outer Ring WNW 4.3 Anderson Res. - Cty Rd 111
Annual Radiological Environmental Operating Report YEAR: 2024 Page 16 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 5, REMP Sampling Locations - Direct Radiation Site #9 Location Type Sector Distance Description M15B Outer Ring NW 4.3 Barton Ave NW M16B Outer Ring NNW 4.4 University Ave and Hancock St, Becker M01C &
Neutron Control D Control NW 11.5 Kirchenbauer Farm M02C &
Neutron Control C Control NE 11.2 Cty Rd 4 & 15 M03C &
Neutron Control A Control SE 11.6 Cty Rd 19 & Jason Ave M04C &
Neutron Control B Control SW 10.3 Maple Lake Water Tower M01S Special Interest WSW 0.66 127th Street NE M02S &
ISFSI-16 (neutron)
Special Interest SW 0.5 Krone Residence M03S Special Interest ESE 1.53 Big Oaks Park M04S Special Interest SE 2.3 Pinewood School M05S Special Interest ESE 3.0 20500 Co. Rd 11, Big Lake M06S Special Interest SE 2.6 Monticello Public Works
Annual Radiological Environmental Operating Report YEAR: 2024 Page 17 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 5, REMP Sampling Locations - Direct Radiation Site #9 Location Type Sector Distance Description I-11 &
ISFSI-11 (neutron)
Special Interest SW 0.31 OCA Fence South, on exit road I-12 &
ISFSI-12 (neutron)
Special Interest SW 0.32 OCA Fence Middle, on exit road I-13 &
ISFSI-13 (neutron)
Special Interest WSW 0.34 OCA Fence North, on exit road
Annual Radiological Environmental Operating Report YEAR: 2024 Page 18 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 6.0 MAPS OF COLLECTION SITES Figure 2, REMP Sample Locations (Surface Water, Sediment, Well Water, Air, and Vegetation)
Annual Radiological Environmental Operating Report YEAR: 2024 Page 19 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 3, REMP Sample Locations (5 Mile Ring and Special Interest TLD Locations)
Annual Radiological Environmental Operating Report YEAR: 2024 Page 20 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 4, REMP Sample Locations (Site Boundary TLD Locations)
Annual Radiological Environmental Operating Report YEAR: 2024 Page 21 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 5, REMP Sample Locations (Control Locations)
Annual Radiological Environmental Operating Report YEAR: 2024 Page 22 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 6, REMP Sample Locations (ISFSI TLD Locations)
Annual Radiological Environmental Operating Report YEAR: 2024 Page 23 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 7.0 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Table 6, Reporting Levels for Radioactivity Concentrations in Environmental Samples Radionuclide Water (pCi/L)
Air Particulates or Gases (pCi/m3)
Fish (pCi/Kg-wet)
Milk (pCi/L)
Food Products (pCi/Kg-wet)
H-3 20,000 (10)
NA NA NA NA Mn-54 1,000 NA 30,000 NA NA Fe-59 400 NA 10,000 NA NA Co-58 1,000 NA 30,000 NA NA Co-60 300 NA 10,000 NA NA Zn-65 300 NA 20,000 NA NA Zr-Nb-95 400 (11)
NA NA NA NA I-131 2 (12) 0.9 NA 3
100 Cs-134 30 10 1,000 60 1,000 Cs-137 50 20 2,000 70 2,000 Ba-La-140 200 (11)
NA NA 300 (11)
NA 10 For drinking water samples: If no drinking water pathway exists, a value of 30,000 pCi/L may be used.
11 Total for parent and daughter product.
12 If no drinking water pathway exists, a value of 20 pCi/L may be used
Annual Radiological Environmental Operating Report YEAR: 2024 Page 24 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 7, Maximum Values for the Limit of Detection Radionuclide Water (pCi/L)
Air Particulates or Gases (pCi/m3)
Fish (pCi/Kg-wet)
Milk (pCi/L)
Food Products (pCi/Kg-wet)
Sediment (pCi/Kg-dry)
Gross Beta 4.0 0.01 NA NA NA NA H-3 2,000 (13)
NA NA NA NA NA Mn-54 15 NA 130 NA NA NA Fe-59 30 NA 260 NA NA NA Co-58, Co-60 15 NA 130 NA NA NA Zn-65 30 NA 260 NA NA NA Zr-Nb-95 15 (14)
NA NA NA NA NA I-131 1 (15) 0.07 1
60 Cs-134 15 0.05 130 15 60 150 Cs-137 18 0.06 150 18 80 180 Ba-La-140 15 (14) 15 8.0 SAMPLING PROGRAM, PROGRAM MODIFICATION AND INTEPRETATION OF RESULTS At most nuclear stations, data was collected prior to plant operation to determine background radioactivity levels in the environment. Annual data is routinely compared to preoperational and/or 10-year average values to determine if changes in the environs are present. Strict comparison is difficult to make due to fallout from historical nuclear weapon testing. Cesium-137 can be routinely found in environmental samples as a results of above ground nuclear weapons testing. It is important to note, levels of Cs-137 in environment are observed to fluctuate, for example as silt distributions shift due to natural erosion and transport processes, Cs-137 may or may not be observed in sediment samples. Results from samples collected and analyzed during the year, 2024, are described below.
In the following sections, results from direct radiation, air, water, and food products analyzed as part of REMP in 2024 will be discussed. Sampling program descriptions and deviations will also be discussed.
13 If no drinking water pathway exists, a value of 3,000 pCi/L may be used. Some states may require a lower LLD for drinking water sources-per 40 CFR 141 Safe drinking water ACT.
14 The specified LLD applies to the daughter nuclide of an equilibrium mixture of the parent and daughter nuclides. Per the Radiological Assessment Branch Technical Position (BTP), the following values may be used for individual nuclide LLDs when equilibrium conditions are not met: 30 pCi/L for zirconium-95, 15 pCi/L for niobium-95, 60 pCi/L for barium-140, and 15 pCi/L for lanthanum-140.
15 If no drinking water pathway exists, a value of 15 pCi/l may be used.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 25 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 8.1 Environmental Direct Radiation Dosimetry Results Dose is measured as net exposure (field reading less transit reading) normalized to 91-day quarters. Data is treated and analyzed consistent with ANSI/HPS N13.37-2014, which compares the measured dose for each location to the baseline background dose for that location. Environmental dose rates vary by location, depending on geological and land use considerations, and remain relatively constant for any given location (unless land use changes). Some facilities observe seasonal variation in environmental doses. Baseline Background Doses have been determined for both quarterly and annual measurements at each location using historical field measurements.
ANSI/HPS N13.37-2014 uses the concept of minimum differential dose (MDD), which is the minimum facility-related dose that can be detected above background. Due to natural background variations and measurement sensitivities and uncertainties, minimum differential dose is not zero. MDD is calculated based on statistical performance of the dosimetry system in the environment and is site specific.
Normalized doses that exceed the Minimum Differential Dose value above the Baseline Background Dose are considered to indicate Facility-Related Dose; a quality assurance review is performed to verify that any results indicating Facility-Related Dose are accurate.
During the calendar year 2024, a total of 40 locations were monitored and data analyzed in accordance with the requirements in Table 1, Radiological Environmental Monitoring Program - Direct Radiation. Attachment 4, Environmental Direct Radiation Dosimetry Results, provides the annual direct radiation dosimetry analysis.
There was no direct radiation dose detected from the facility. All TLD/OSLD measurements were analyzed, and none were found to have radiation levels that had increased over normal background radiation levels.
The TLD at M03A was left in place for two consecutive quarters (Q1 and Q2). The laboratory results were normalized according to the actual time left in place, and the same TLD value was applied to Q1 and Q2. To avoid potential damages, M06A TLD was relocated across the street from its original location to a temporary post during Q3 2024 due to construction activity. Relocation of the TLD will be evaluated following the completion of construction in the area. Results at this location appear close to trend. M13A TLD was missing Q3 2024. The TLD was likely damaged due to weather or other environmental conditions. See Table 9: Sample Deviation Summary in Section 10.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 26 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 8.2 Air Particulate and Radioiodine Sample Results Air particulate filters and charcoal canisters were collected from locations specified in Table 1, Radiological Environmental Monitoring Program - Direct Radiation. During the calendar year 2024, a total of 257 samples were collected and analyzed for iodine-131, gross beta, and/or gamma emitters (not including missed samples, noted below). Particulate samplers are used to continuously collect airborne particulates on a filter. The samples are analyzed for gross beta activity following filter changeout which occurs weekly. Gamma isotopic analysis is also performed on the samples collected at each location and is analyzed quarterly. Radioiodine (I-131) analysis is performed weekly on radioiodine sample cartridges.
Some of the air particulate and radioiodine samples were below detection and some contained radioactivity.
The average annual gross beta concentrations in airborne particulates were similar at the indicator (0.035 +/- 0.013 picocuries per cubic meter (pCi/m3) for 2024) and control locations (0.036 +/- 0.018 pCi/m3 for 2024). Air sampler M-5 was found with a partial sample the week of 1/31/2024 and is considered a missed sample since all partial samples are considered missed samples. The M-2 weekly sample for the week of 05/01/2024 is also considered a missed sample due to the sample head being dropped and a visual observation of dust produced on impact. Sampler M-1c was discovered with its pump out of operation while collecting the weekly sample for the week of 05/15/2024. Further details are provided in Table 9: Sample Deviation Summary, in Section 10.
Air particulate and radioiodine results from this monitoring period, 2024, were compared to the average and range of the previous 10 years of data shown in Figure 7, and there were no changes in the baseline (specifically, the 2024 result was comparable to the previous 10-year dataset).
Annual Radiological Environmental Operating Report YEAR: 2024 Page 27 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 7, Air Particulate: Analysis for Gross Beta, Average for All Indicator vs. Control Locations 8.3 Waterborne Sample Results 8.3.1 Surface Water (i.e., Bay, Lake etc.)
Composite water samples are collected monthly at the upstream control location and at the downstream indicator locations. Monthly composite samples are analyzed for gamma emitters. Aliquots from the monthly composites are combined to form a quarterly composite which is then analyzed for tritium. During the calendar year 2024, a total of 23 surface water samples were collected and analyzed in accordance with the requirements in the ODCM and shown in Table 3, Radiological Environmental Monitoring Program - Waterborne. Lanthanum-140 was detected at a value of 18.1 +/- 16 pCi/L in the control location M-8c May sample. Although this value was below the measured (laboratory-established) MDC of 18.2 pCi/L, it was above the LLD of 15 pCi/L, and therefore it was not assigned a U flag. Although this value is above the reporting level of 15 pCi/L (Table 7), the quarterly average including April and June values (which were below the LLD) is below 15 pCi/L. ODCM 07.01 (Section 2.1.3 C.) states that the results need to be reported to the Commission within 30 days if they exceed the reporting level in Table 3.4-1 when averaged over any calendar quarter. Samples could not be collected from M-8c in December of 2024 due to unsafe conditions for sampling (frozen river surface). Table 9: Sample Deviation Summary further details the missed sample. Tritium concentrations in surface water were well below the EPA tritium drinking water limit of 20,000 pCi/L.
0.000 0.010 0.020 0.030 0.040 0.050 0.060 0.070 0.080 0.090 0.100 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 (pCi/M3)
Year Air Particulate: Gross Beta at Indicator vs. Control Locations Indicators Control
Annual Radiological Environmental Operating Report YEAR: 2024 Page 28 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 8: Surface Water Tritium Results 8.3.2 REMP Groundwater Groundwater samples were collected from control location upgradient from the plant and indicator location down gradient from the plant. During the calendar year 2024, a total of 16 groundwater water samples were collected from offsite monitoring wells and analyzed in accordance with the requirements in the ODCM and shown in Table 3: Radiological Environmental Sampling Program - Exposure Pathway - Waterborne.
A total of four control samples and a total of 12 indicator samples were collected.
These samples were analyzed for tritium and gamma quarterly.
There were no samples containing detectable amounts of radioactivity. Tritium concentrations in groundwater were well below the EPA tritium drinking water limit of 20,000 pCi/L.
-5,000 0
5,000 10,000 15,000 20,000 25,000 2018 2019 2020 2020 2021 2022 2023 2024 2025 Tritium Activity (pCi/L)
Surface Water Tritum Data Indicator Control EPA Limit
Annual Radiological Environmental Operating Report YEAR: 2024 Page 29 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 9: REMP Groundwater Tritium Sample Results 8.3.3 Drinking Water A total of 12 drinking water samples were obtained in 2024. These samples were analyzed for gross beta and gamma analysis monthly and tritium quarterly in accordance with requirements in the ODCM and shown in Table 3, Radiological Environmental Monitoring Program - Waterborne. No samples contained detectable amounts of radioactivity. Because each measurement was below its respective LLD value, the annual dose for drinking water was assumed to be less than 1 mrem/year, and therefore iodine-131 analyses were not conducted in 2024 per ODCM 07.01 Revision 27. Tritium concentrations in drinking water were well below the EPA tritium drinking water limit of 20,000 pCi/L.
-5,000 0
5,000 10,000 15,000 20,000 25,000 Nov-23 Jan-24 Mar-24 Apr-24 Jun-24 Aug-24 Sep-24 Nov-24 Dec-24 Tritium Activity (pCi/L)
REMP Groundwater Tritium Sample Results M-11 City of Monticello M-12 Plant Well #11 M-55 Hasbrouck Residence Control EPA Limit
Annual Radiological Environmental Operating Report YEAR: 2024 Page 30 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Figure 10: Drinking Water Gross Beta Samples Control Figure 11: Drinking Water Tritium Sample Results 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 Gross Beta Activity (pCi/L)
Years Drinking Water Gross Beta Indicator
-5,000 0
5,000 10,000 15,000 20,000 25,000 2019 2020 2021 2022 2023 2024 2025 Tritium Activity (pCi/L)
Drinking Water Tritium Data Indicator EPA Limit
Annual Radiological Environmental Operating Report YEAR: 2024 Page 31 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 8.3.4 Sediment from Shoreline Shoreline sediment collections were made in July and October of 2024 and analyzed for gamma-emitting isotopes. Samples are collected at both indicator and control locations. A total of six shoreline samples were analyzed in accordance with requirements in the ODCM and shown in Table 3, Radiological Environmental Monitoring Program - Waterborne.
Naturally occurring beryllium-7 and potassium-40 were detected. There was no indication of a MNGP effect.
8.4 Ingestion Pathway Sample Results 8.4.1 Milk 8.4.2 Since 2019, one milk cow has been located at 3.25 miles from MNGP in the NNE sector. The animal was infrequently milked and only provided enough for the family usage. The cow gave birth approximately four years ago and discussion with the owner confirmed they now milk the newer cow. Discussion with the owner indicates that when the cow is producing milk there is enough for the family to use, but not enough extra to provide samples in the quantity and frequency required for the site.
There is also a beef cow and garden at this location. Due to the relatively low deposition, the calculated dose at this location is lower than the vegetation sample locations. Milk samples are required for three locations within 3 miles or three locations where doses are calculated to be greater than 1 mrem/year (ODCM 07.01).
The identified Milk animal is greater than 3 miles from the site, and the dose from all pathways at that location is 0.0172 mrem/year to the infant thyroid. Thus, vegetation sampling was performed in lieu of milk sampling. Samples are collected from broad leaf vegetation grown nearest each of two different offsite locations of highest predicated annual average ground level atmospheric deposition factors (D/Q).
Samples were analyzed for gamma isotopic and I-131 monthly.
There were no samples containing detectable amounts of radioactivity.
8.4.3 Fish A total of eight fish samples were collected in 2024 from the indicator and control areas as required by the ODCM. These samples were analyzed for gamma emitting radionuclides in edible portions, in accordance with requirements of the ODCM and summarized in Table 4, Radiological Environmental Monitoring Program - Ingestion.
These samples are collected from the indicator and control areas as required by the ODCM.
Smallmouth bass were unable to be obtained at the M-9 sampling location due to low river level during the second semiannual fish sampling event. However, samples of the red horse species collected at upstream and downstream locations fulfilled the one species at each location requirement per ODCM-07.01.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 32 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 8.4.4 Food Products Food product samples were not analyzed in 2024, as this sample pathway is currently unavailable to MNGP.
There are no crops being irrigated from the Mississippi River within five miles downstream of the plant, based upon the most recent Water Use Resources Permit Index Report from the Minnesota Department of Natural Resources. The nearest downstream drinking water supplies drawn from the Mississippi River remain St. Paul and Minneapolis water supplies as currently documented in the ODCM and Updated Final Safety Analysis Report.
8.4.5 Leafy Vegetation In accordance with the ODCM and as described in Table 4, Radiological Environmental Monitoring Program - Ingestion, in the highest predicted annual average ground level D/Q sectors, 12 broad leaf vegetation samples were collected from the growing locations near the site boundary. Samples are collected and analyzed for gamma isotopic and I-131 from the indicator and control locations monthly during growing season. It is common to detect Cs-137 in broadleaf samples at both indicator and control locations. Cs-137 can be attributed to offsite sources such as weapons testing, Chernobyl, and Fukushima events.
Leafy vegetation samples contained no detectable amounts of radioactivity in 2024.
9.0 LAND USE CENSUS The ODCM requires the performance of an annual land use census, where changes in how the land is used at or beyond the site boundary are documented. These changes are evaluated and modifications to the REMP are made as needed. The land use census satisfies the requirements of Section IV.B.3 of Appendix I to 10 CFR 50 [2]. NUREG-1301/1302 Control 3.12.2 specifies that "a Land Use Census shall be conducted and shall identify within a distance of 8 km (5 mi.) the location in each of the 16 meteorological sectors of the nearest milk animal, the nearest residence and the nearest garden of greater than 50 m2 (500 ft2) producing broad leaf vegetation.
MNGP also located all milk animals, meat animals, and gardens of 500 ft2 or greater with leafy green vegetables within a three-mile radius of the plant. Note, per NUREG-1301/1302, Broad leaf vegetation sampling of at least three different kinds of vegetation may be performed at the SITE BOUNDARY in each of two different direction sectors with the highest predicted D/Qs in lieu of the garden census.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 33 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant The land use census was conducted within the growing season in the calendar year 2024 to identify changes in land use, receptor locations, and new exposure pathways.
The results for the 2024 Land Use Census are listed in Table 8: Land Use Census -
Nearest Receptors within 5 miles. In summary, the highest D/Q locations for nearest garden, nearest residence and nearest milk animal did not change following the 2024 census. The notable change from the previous year (which did not affect the highest D/Q locations) is that the cows previously identified at 4.73 mi in the J (S) sector were no longer present. There were no indicators of animals having grazed the property for some time.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 34 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 8: Land Use Census - Nearest Receptors within 5 miles Sector Direction Nearest Residence (Miles)
Meat Animal (Miles)
Nearest Milk Animal (Miles)
Meat and Garden (Miles)
Nearest Garden (Miles)
A N
2.58 3.78 3.24 3.31 B
NNE 2.63 3.28 3.30 3.30 C
NE 2.24 3.30 2.78 D
ENE 1.35 2.41 E
E 1.38 1.88 F
ESE 1.49 1.50 G
SE 1.00 1.11 H
SSE 0.99 1.14 J
S 0.83 4.40 0.90 K
SSW 0.64 4.54 2.77 1.64 L
SW 0.52 2.27 3.40 2.01 M
WSW 0.72 1.77 2.32 1.22 N
W 1.29 2.15 1.82 1.38 P
WNW 1.32 3.16 3.41 1.34 Q
NW 2.28 3.43 2.49 R
NNW 2.40 2.39 10.0 SAMPLE DEVIATIONS, ANOMALIES AND UNAVAILABILITY Sampling and analysis are performed for media types addressed in the Offsite Dose Calculation Manual. Sampling and analysis challenges may be experienced due to a multitude of reasons including environmental factors, loss of TLDs/OSLDs, contamination of samples, etc. To aid classification of sampling and analysis challenges experienced in 2024, the following three terms are used to describe the issues: Sample Anomalies, Sample Deviation, and Unavailable Samples.
Media that experienced downtime (i.e., air samplers or water samplers) during a surveillance period are classified a Sample Deviation. Sample Anomalies are defined as errors that were introduced to a sample once it arrived in the laboratory, errors that prevents the sample from being analyzed as it normally would, or may have altered the outcome of the analysis (i.e., cross contamination, human error).
Sample Unavailability is defined as sample collection with no available sample (i.e.,
food crop, TLD).
All required samples were collected and analyzed as scheduled except for the following:
Annual Radiological Environmental Operating Report YEAR: 2024 Page 35 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 9: Sample Deviation Summary Sample Type and Analysis Location Collection Date or Period Reason for not conducting REMP sampling as required by ODCM Plans for preventing reoccurrence Surface Water Gamma Isotopic M-8c Jan 2024 Unsafe condition for sampling due to frozen river surface (501000080950).
Sample obtained when water thawed. Not a missed sample.
Updated Department Action Request (DAR; 603000008789) with this Corrective Action Program (CAP) number for tracking.
Airborne Particulate Gross Beta and Radioiodine M-5 Week of 1/31/2024 Sample pump was tripped with only 3 minutes recorded on the timer. Declaring missed sample due to possibility of partial sample.
(501000081471)
Restarted pump, replaced charcoal and particulate filter, checked pump parameters, monitored pump performance.
Updated DAR with this CAP number for tracking.
Surface Water Gamma Isotopic M-8c Feb 2024 Unsafe condition for sampling due to frozen river surface.
(501000082324, 501000082324)
Sample obtained when water thawed. Not a missed sample.
Updated DAR with this CAP number for tracking.
Direct Radiation Gamma Dose M03A Q1 TLD not collected during quarterly TLD changeout.
(501000084645)
Contacted vendor, TLD remained posted for two quarters. Vendor indicated TLDs posted for two quarters get a good result, this is not a missed sample. Updated DAR with this CAP number for tracking.
Airborne Particulate Gross Beta and Radioiodine M-2 Week of 05/01/2024 Sample head was bumped and fell off the air sampler platform. A puff of dust was produced on impact indicating some loosely held particles came off. The sample was still collected but is counted as a missed sample due to likelihood of anomalous result.
(501000084764)
Informed supervision and wrote CAP. Captured lesson learned and provided coaching to staff to prevent a recurrence. Updated DAR with this CAP number for tracking.
Airborne Particulate Gross Beta and Radioiodine M-1c Week of 05/15/2024 Sample pump discovered out of operation. Pump timer indicated sample was not collected for required week-long sample period. This is a missed sample.
(501000085397)
Verified pump was turned on, had power supply and circuit was not tripped. Replaced the pump.
Verified new pump started and operated as expected. Updated DAR with this CAP number for tracking.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 36 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 9: Sample Deviation Summary Direct Radiation Gamma Dose M06A Q3 Does not indicate missed sample or abnormal results.
To avoid damages during construction, M06A TLD was moved on 7/30/2024 to a temporary post across the road from previous location.
(501000088343)
Relocation to be evaluated following completion of construction. Updated DAR with this CAP number for tracking.
Fish Gamma Isotopic M-9 Second Semiannual Smallmouth bass unable to be collected at the downstream river location but were collected upstream.
(501000090278)
Red horse was collected upstream and downstream, and therefore this was not a missed sample. Updated DAR with this CAP number for tracking.
Direct Radiation Gamma Dose M13A Q3 TLD was missing, but holder was intact. Likely missing due to weather or other environmental factors.
(501000090642)
Continued monitoring to determine cause and potential for recurrence. Updated DAR with this CAP number for tracking.
Surface Water Gamma Isotopic M-8c Dec 2024 Unsafe condition for sampling due to frozen river surface.
(501000092967, 501000093180, 501000093439, 501000093604)
Updated DAR with this CAP number for tracking.
Direct Radiation Gamma Dose M06B Q4 Sampler was likely struck by snow removal equipment.
TLD and holder missing.
(501000093819)
Updated DAR with this CAP number for tracking.
11.0 OTHER SUPPLEMENTAL INFORMATION 11.1 NEI 07-07 Onsite Radiological Groundwater Monitoring Program Monticello Nuclear Generating Plant has developed a Groundwater Protection Initiative (GPI) program in accordance with NEI 07-07, Industry Ground Water Protection Initiative - Final Guidance Document. The purpose of the GPI is to ensure timely detection and an effective response to situations involving inadvertent radiological releases to groundwater in order to prevent migration of licensed radioactive material off-site and to quantify impacts on decommissioning. It is important to note, samples and results taken in support of NEI 07-07 on-site groundwater monitoring program are separate from the Radiological Environmental Monitoring Program (REMP). Results of the NEI 07-07 Radiological Groundwater Monitoring Program for onsite groundwater wells are provided in the ARERR.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 37 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 11.2 Independent Spent Fuel Storage Installation (ISFSI) Monitoring Program Gamma and Neutron TLDs are located around the Independent Spent Fuel Storage Installation (ISFSI) to monitor direct radiation from stored fuel for trending purposes.
The ISFSI TLDs are not considered true REMP TLDs and are not representative of the dose to members of the public. Results for monitoring are included in Attachment
- 2.
No additional spent fuel casks were moved to the ISFSI in 2024. Annual data trends at and in the vicinity of the ISFSI are consistent with expectations. There were no detectable dose rate increases observed at the Site boundary TLDs in 2024.
11.3 Corrections to Previous Reports There are no corrections to the 2023 AREOR.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 38 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 12.0 BIBLIOGRAPHY
[1] NCRP, "Report No. 160, Ionizing Radiation Exposure of the Population of the United States,"
National Council on Radiation Protection, Bethesda, 2009.
[2] "10 CFR 50, "Domestic Licensing of Production and Utilization Facilities"," US Nuclear Regulatory Commission, Washington, DC.
[3] "Regulatory Guide 4.1, "Radiological Environmental Monitoring for Nuclear Power Plants",
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[4] "NUREG-1301, Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Pressurized Water Reactors,.," Nuclear Regulatory Commission, April 1991.
[5] "NUREG-1302, Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Boiling Water Reactors,," Nuclear Regulatory Commission, April 1991.
[6] "Branch Technical Position, Revision 1," NRC000096, Submitted March 30, 2012, November 1979.
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[8] "Regulatory Guide 4.15, Quality Assurance for Radiological Monitoring Programs (Inception through Normal Operations to License Termination) -- Effluent Streams and the Environment,"
Nuclear Regulatory Commission, July, 2007.
[9] "Regulatory Guide 4.13, Performance, Testing, and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications, Revision 2," Nuclear Regulatory Commision, June, 2019.
[10] "NUREG/CR-2919, XOQDOQ Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations,," Nuclear Regulatory Commission, September, 1982.
[11] "Measurements of Radionuclides in the environment Sampling and Analysis of plutonium in soil,"
Nuclear Regulatory Commission, 1974.
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[14] "ICRP Publication 60, ICRP Publication 60: 1990 Recommendations of the International Commission on Radiological Protection, 60, Annals of the ICRP Volume 21/1-3,," International Commission on Radiation Protection, October, 1991.
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Nuclear Regulatory Commission, 1987.
[17] "Regulatory Guide 1.109, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Demonstrating Compliance with 10 CFR Part 50, Appendix I,,"
Nuclear Regulatory Commission, Ocotober, 1977.
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[19] "NEI 07-07, Industry Ground Water Protection InitiativeFinal Guidance Document,," Nuclear Energy Institute, Washington, D.C..
Annual Radiological Environmental Operating Report YEAR: 2024 Page 39 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
[20] "ANSI 13.37, Environmental Dosimetry-Criteria for System Design and Implementation," Health Physics Society (HPS), May, 2019.
[21] "40 CFR Part 141, National Primary Drinking Water Regulations,," US Environmental Protection Agency, Washington, DC..
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[23] "NEI 07-07, Industry Ground Water Protection InitiativeFinal Guidance Document, Rev. 1,"
Nuclear Energy Institute, Washington, D.C., 2019.
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[26] "Japan Atomic Energy Agency," 06 November 2020. [Online]. Available:
https://www.jaea.go.jp/english/04/ntokai/houkan/houkan_02.html.
[27] "NRC Resource Page," [Online]. Available: http://www.nrc.gov/about-nrc/radiation.html. [Accessed 10 November 2020].
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Nuclear Regulatory Commission, 1987.
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Nuclear Regulatory Commission, July, 2007.
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Annual Radiological Environmental Operating Report YEAR: 2024 Page 40 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
, Data Table Summary Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Airborne Particulates (pCi/m3)
Gross Beta (257) 0.01 0.035 (206/206) 0.013 - 0.213 M-1c, Air Station 11.0 m @ 307/NW 0.036 (49/51) 0.003-0.102 0.036 (49/51) 0.003-0.102 0
Gamma (20)
Be-718 Mn-54 Co-58 Co-60 Zn-65 Zr-Nb-95 Ru-103 Ru-106 Cs-134 Cs-137 Ba-La-140 Ce-141 Ce-144 0.05 0.06 0.061 (16/16) 0.043 - 0.090
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD M-1c, Air Station 11.0 m @ 307/NW 0.065 (4/4) 0.051 - 0.090 0.065 (4/4) 0.051 - 0.090
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD 0
Airborne Radioiodine (pCi/m3)
I-131 (258) 0.07
<LLD
<LLD 0
16 Mean and range are based upon detectible measurements only.
17 (f) Fraction of detectible measurements at a specific location.
18 Natural and not due to Plant influence.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 41 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Broadleaf Vegetation (pCi/kg-wet)
Gamma (12)
Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 I-131 Cs-134 Cs-137 60 60 80
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD 0
Milk (pCi/L)
I-131 (0) 1 N/A N/A N/A N/A 0
Gamma (0)
N/A N/A N/A N/A N/A 0
Annual Radiological Environmental Operating Report YEAR: 2024 Page 42 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Fish (pCi/kg-wet)
Gamma (8)
K-4020 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 130 260 130 130 260 130 150 3475 (4/4) 3020 - 4330
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD M-9 Downstream of Plant 3475 (4/4) 3020 - 4330 3213 (4/4) 2900 - 3370
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD 0
Annual Radiological Environmental Operating Report YEAR: 2024 Page 43 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Shoreline Sediments (pCi/kg-dry)
Gamma (6)
Be-7(18)
K-40(18)
Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 150 180
- (0/4) 11267 (3/4) 10100 - 12200
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD M-15 Montissippi Park M-15 Montissippi Park 335 (1/2) 335 11500 (2/2) 11000 - 12000 355 (1/2) 335 11500 (2/2) 11000 - 12000
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD 0
Drinking Water (pCi/L)
Gross Beta (12) 4
<LLD None 0
Annual Radiological Environmental Operating Report YEAR: 2024 Page 44 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Drinking Water (pCi/L)
Gamma (12)
Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 15 30 15 15 30 15(19) 15 18 15(19)
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD22
<LLD None None None None None None None None None None 0
I-131 (0) 1 None 0
Tritium (4) 2000
<LLD None 0
19 The specified LLD applies to the daughter nuclide of an equilibrium mixture of the parent and daughter nuclides. Per the BPT, the following values may be used for individual nuclide LLDs when equilibrium conditions are not met: 30 pCi/L for zirconium-95, 15 pCi/L for niobium-95, 60 pCi/L for barium-140, and 15 pCi/L for lanthanum-140.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 45 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Groundwater (pCi/L)
Gamma (16)
Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 15 30 15 15 30 15(19) 15 18 15(19)
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD 0
I-13120 (0) 121
<LLD
<LLD 0
Tritium (4) 2000
<LLD
<LLD 0
20 Not required.
21 If no drinking water pathway exists, a value of 15 pCi/L may be used.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 46 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 River Water (pCi/L)
Gamma (23)
Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 15 30 15 15 30 15(19) 15 18 15(19)
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
- (0/12)
<LLD M-8c Upstream of Plant 18 (1/11) 18
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
<LLD
- (0/10)
<LLD 0
Tritium (8) 2000
<LLD
<LLD 0
Direct Radiation:
Control (10 to 12 miles distant)
(mrem/91 days)
Gamma (16)
N/A M03C 11.6 mi @
130/SE 13.7 (4/4)
(12.9 - 14.8) 10.6 (16/16)
(12.2 - 14.0) 0 Direct Radiation:
Inner Ring (General Area at Site Boundary)
(mrem/91 days)
Gamma (55) 14.1 (55/55)
(10.8 - 17.4)
- M01A, 0.75 mi @ 353/N 16.2 (4/4)
(14.7-17.4) 0
Annual Radiological Environmental Operating Report YEAR: 2024 Page 47 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Medium or Pathway Sampled (Units)
Type, Total Number of Analyses performed ODCM Table 3 Lower Limit of Detection (LLD)
Indicator Mean16 Location with Highest Annual Mean Control Mean16 (f)17 Number of Nonroutine Reported Measurements Name Mean16 Range16 (e.g. I-131, 400)
(f)17 Distance and Direction (f)17 Range16 Range16 Direct Radiation:
Outer Ring (4-5 mi. distant)
(mrem/91 days)
Gamma (63) 13.8 (63/63)
(10.4 - 16.6)
M09B, 4.7 mi @ 117/S 15.1 (4/4)
(13.8 - 16.6) 0 Direct Radiation:
Special Interest Areas (mrem/91 days)
Gamma (36) 14.2 (36/36)
(10.6 - 18.7)
M05S 3.0 mi @ 118/ESE 15.2 (4/4)
(13.6-18.7) 0
Annual Radiological Environmental Operating Report YEAR: 2024 Page 48 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
, Complete Data Table for All Analysis Results Obtained In 2024 Table 10: Airborne Cartridge: Radioiodine (pCi/m3)
Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 1/3/2024 5.73E-03 +/- 1.31E-02 U
-1.82E-04 +/- 9.86E-03 U
1.28E-03 +/- 1.22E-02 U
1.11E-03 +/- 1.12E-02 U
-1.28E-03 +/- 1.54E-02 U
1/10/2024
-2.00E-03 +/- 6.75E-03 U
2.70E-03 +/- 8.93E-03 U
4.36E-03 +/- 8.61E-03 U
-5.02E-03 +/- 9.88E-03 U
-4.62E-03 +/- 1.00E-02 U
1/17/2024
-1.56E-03 +/- 8.56E-03 U
4.54E-04 +/- 1.00E-02 U
3.42E-03 +/- 7.48E-03 U
-2.74E-03 +/- 6.90E-03 U
-2.11E-03 +/- 6.72E-03 U
1/23/2024
-4.77E-03 +/- 1.09E-02 U
5.06E-03 +/- 9.65E-03 U
2.02E-02 +/- 1.21E-02 U
-1.87E-03 +/- 1.03E-02 U
4.73E-03 +/- 8.28E-03 U
1/31/2024 7.68E-03 +/- 6.85E-03 U
-2.40E-03 +/- 7.30E-03 U
6.31E-04 +/- 5.74E-03 U
1.15E-02 +/- 6.12E-03 UI Missed Sample22 2/7/2024
-7.48E-04 +/- 6.13E-03 U
1.22E-03 +/- 8.61E-03 U
-6.24E-04 +/- 6.57E-03 U
-3.08E-03 +/- 5.42E-03 U
1.08E-02 +/- 1.62E-02 U
2/13/2024
-3.42E-03 +/- 1.03E-02 U
-2.81E-03 +/- 1.09E-02 U
-2.69E-04 +/- 9.74E-03 U
9.47E-03 +/- 1.17E-02 U
3.47E-03 +/- 9.32E-03 U
2/20/2024 5.11E-03 +/- 8.30E-03 U
-7.68E-04 +/- 1.00E-02 U
9.34E-04 +/- 7.79E-03 U
-3.68E-03 +/- 8.51E-03 U
-4.65E-03 +/- 9.41E-03 U
2/28/2024
-5.00E-03 +/- 8.05E-03 U
-5.23E-03 +/- 8.60E-03 U
5.96E-03 +/- 1.05E-02 U
3.24E-03 +/- 8.40E-03 U
1.05E-03 +/- 6.59E-03 U
3/6/2024 1.09E-02 +/- 1.89E-02 U
2.14E-02 +/- 1.83E-02 U
-3.84E-03 +/- 1.29E-02 U
-1.70E-03 +/- 1.43E-02 U
-9.08E-03 +/- 1.46E-02 U
3/12/2024
-3.61E-03 +/- 1.62E-02 U
8.01E-03 +/- 1.63E-02 U
-7.81E-03 +/- 1.06E-02 U
8.21E-03 +/- 1.26E-02 U
3.12E-03 +/- 1.50E-02 U
3/20/2024 3.75E-03 +/- 9.73E-03 U
-4.31E-03 +/- 8.23E-03 U
1.98E-03 +/- 9.13E-03 U
-1.15E-03 +/- 6.20E-03 U
-3.57E-03 +/- 1.30E-02 U
3/27/2024
-1.49E-04 +/- 1.40E-02 U
-7.46E-03 +/- 1.16E-02 U
1.58E-04 +/- 8.55E-03 U
8.57E-03 +/- 9.99E-03 U
6.46E-03 +/- 9.85E-03 U
4/3/2024
-5.29E-03 +/- 1.25E-02 U
4.75E-03 +/- 1.13E-02 U
-5.86E-03 +/- 1.58E-02 U
1.93E-03 +/- 1.64E-02 U
8.73E-03 +/- 1.53E-02 U
22 Sample pump was tripped with only 3 minutes recorded on the timer. Declaring missed sample due to possibility of partial sample.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 49 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 10: Airborne Cartridge: Radioiodine (pCi/m3)
Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 4/10/2024
-5.19E-03 +/- 1.85E-02 U
-1.86E-02 +/- 2.44E-02 U
2.25E-02 +/- 2.33E-02 U
-1.99E-02 +/- 2.71E-02 U
9.53E-03 +/- 1.80E-02 U
4/17/2024 1.20E-02 +/- 2.14E-02 U
-3.64E-04 +/- 1.77E-02 U
6.91E-03 +/- 1.72E-02 U
-5.27E-03 +/- 1.29E-02 U
1.82E-03 +/- 2.58E-02 U
4/24/2024
-1.14E-02 +/- 1.20E-02 U
4.33E-03 +/- 9.77E-03 U
4.32E-03 +/- 1.44E-02 U
5.25E-03 +/- 1.16E-02 U
-7.48E-03 +/- 1.28E-02 U
5/1/2024
-6.79E-03 +/- 1.70E-02 U
Missed Sample23 7.11E-05 +/- 1.90E-02 U
-1.29E-02 +/- 1.82E-02 U
4.34E-02 +/- 2.20E-02 UI 5/8/2024
-4.63E-03 +/- 1.72E-02 U
2.26E-03 +/- 1.20E-02 U
8.60E-03 +/- 7.81E-03 U
1.25E-02 +/- 1.61E-02 U
3.68E-03 +/- 1.01E-02 U
5/15/2024 Missed Sample24
-2.62E-03 +/- 2.33E-02 U
1.55E-02 +/- 1.88E-02 U
8.83E-03 +/- 1.86E-02 U
1.23E-03 +/- 1.46E-02 U
5/22/2024 1.69E-02 +/- 1.25E-02 U
-5.88E-03 +/- 1.57E-02 U
9.60E-04 +/- 1.30E-02 U
3.57E-03 +/- 1.67E-02 U
-4.73E-03 +/- 1.77E-02 U
5/29/2024
-6.56E-03 +/- 1.63E-02 U
-3.05E-03 +/- 1.25E-02 U
2.29E-03 +/- 1.60E-02 U
-1.22E-03 +/- 1.63E-02 U
-9.68E-03 +/- 1.51E-02 U
6/5/2024
-1.42E-02 +/- 1.79E-02 U
1.67E-03 +/- 1.68E-02 U
-9.73E-03 +/- 1.47E-02 U
4.35E-05 +/- 1.91E-02 U
1.36E-03 +/- 1.57E-02 U
6/12/2024 6.25E-03 +/- 3.65E-02 U
6.46E-03 +/- 2.83E-02 U
-3.07E-02 +/- 3.14E-02 U
-2.39E-03 +/- 3.30E-02 U
1.06E-04 +/- 2.75E-02 U
6/19/2024 2.51E-02 +/- 3.29E-02 U
9.84E-04 +/- 1.34E-02 U
5.35E-03 +/- 1.86E-02 U
-5.46E-03 +/- 1.73E-02 U
-9.53E-04 +/- 1.14E-02 U
6/26/2024
-1.45E-02 +/- 2.97E-02 U
1.18E-02 +/- 2.40E-02 U
5.17E-03 +/- 2.91E-02 U
9.27E-03 +/- 2.65E-02 U
-1.27E-03 +/- 2.99E-02 U
7/3/2024 1.10E-02 +/- 2.27E-02 U
-7.51E-03 +/- 1.44E-02 U
1.00E-02 +/- 1.39E-02 U
5.41E-03 +/- 1.25E-02 U
-1.80E-03 +/- 1.88E-02 U
7/10/2024 1.21E-02 +/- 2.25E-02 U
8.56E-03 +/- 2.93E-02 U
2.36E-03 +/- 4.00E-02 U
-5.17E-02 +/- 3.97E-02 U
3.62E-02 +/- 8.46E-02 U
23 Sample head was bumped and fell off the air sampler platform. A puff of dust was produced on impact indicating some loosely held particles came off. The sample was still collected but is counted as a missed sample due to likelihood of anomalous result.
24 Sample pump discovered out of operation. Pump timer indicated sample was not collected for required week-long sample period. This is a missed sample.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 50 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 10: Airborne Cartridge: Radioiodine (pCi/m3)
Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 7/17/2024 2.32E-02 +/- 2.50E-02 U
-1.27E-03 +/- 1.95E-02 U
1.82E-02 +/- 1.82E-02 U
-4.04E-03 +/- 1.75E-02 U
-3.30E-05 +/- 2.07E-02 U
7/24/2024 2.00E-02 +/- 3.37E-02 U
-1.96E-02 +/- 4.15E-02 U
1.61E-04 +/- 3.04E-02 U
7.02E-03 +/- 3.74E-02 U
-4.44E-03 +/- 2.58E-02 U
7/31/2024 1.74E-02 +/- 2.75E-02 U
2.94E-02 +/- 2.76E-02 U
6.67E-03 +/- 3.47E-02 U
8.44E-02 +/- 8.96E-02 UI
-7.99E-03 +/- 3.13E-02 U
8/7/2024 6.69E-03 +/- 1.96E-02 U
-1.32E-02 +/- 2.04E-02 U
0.00E+00 +/- 1.93E-02 U
-3.12E-03 +/- 1.91E-02 U
2.52E-02 +/- 3.77E-02 U
8/14/2024 9.49E-03 +/- 1.63E-02 U
-3.68E-03 +/- 1.32E-02 U
-1.30E-03 +/- 1.30E-02 U
1.25E-02 +/- 1.22E-02 U
-1.75E-03 +/- 1.18E-02 U
8/21/2024
-2.87E-02 +/- 3.89E-02 U
-7.57E-03 +/- 2.58E-02 U
9.08E-03 +/- 2.23E-02 U
7.16E-03 +/- 2.12E-02 U
2.35E-02 +/- 3.22E-02 U
8/28/2024
-4.01E-03 +/- 1.64E-02 U
4.67E-05 +/- 1.40E-02 U
7.49E-03 +/- 1.12E-02 U
-3.51E-03 +/- 1.26E-02 U
1.04E-02 +/- 1.26E-02 U
9/4/2024 7.08E-03 +/- 1.77E-02 U
5.83E-03 +/- 2.25E-02 U
-3.72E-03 +/- 2.19E-02 U
2.53E-03 +/- 1.48E-02 U
1.36E-02 +/- 1.62E-02 U
9/11/2024
-8.14E-03 +/- 8.31E-03 U
5.02E-03 +/- 1.24E-02 U
4.19E-03 +/- 1.24E-02 U
-9.71E-03 +/- 1.58E-02 U
4.62E-03 +/- 1.50E-02 U
9/18/2024 2.06E-02 +/- 2.65E-02 U
-2.24E-02 +/- 1.36E-02 U
9.41E-03 +/- 1.67E-02 U
3.58E-03 +/- 1.44E-02 U
3.37E-03 +/- 1.65E-02 U
9/25/2024 1.36E-02 +/- 1.89E-02 U
-2.68E-02 +/- 2.77E-02 U
1.66E-02 +/- 2.45E-02 U
1.40E-02 +/- 1.98E-02 U
-6.23E-03 +/- 2.47E-02 U
10/2/2024 2.28E-03 +/- 1.20E-02 U
2.42E-03 +/- 1.54E-02 U
-2.54E-03 +/- 1.15E-02 U
3.15E-03 +/- 1.72E-02 U
3.01E-03 +/- 1.38E-02 U
10/9/2024 2.38E-03 +/- 1.53E-02 U
9.16E-04 +/- 1.46E-02 U
1.73E-03 +/- 1.62E-02 U
4.69E-04 +/- 9.75E-03 U
-2.76E-03 +/- 1.24E-02 U
10/16/2024 1.47E-04 +/- 1.74E-02 U
2.59E-02 +/- 2.21E-02 U
1.04E-02 +/- 1.30E-02 U
-2.73E-03 +/- 2.80E-02 U
-1.57E-03 +/- 2.47E-02 U
10/23/2024
-4.70E-03 +/- 1.39E-02 U
9.82E-03 +/- 2.13E-02 U
6.95E-03 +/- 1.19E-02 U
2.52E-03 +/- 9.81E-03 U
9.95E-04 +/- 1.55E-02 U
10/30/2024 2.45E-02 +/- 3.45E-02 U
9.79E-03 +/- 2.65E-02 U
1.41E-02 +/- 2.67E-02 U
-2.17E-03 +/- 2.37E-02 U
-1.75E-02 +/- 2.85E-02 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 51 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 10: Airborne Cartridge: Radioiodine (pCi/m3)
Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 11/6/2024
-5.98E-03 +/- 1.52E-02 U
8.03E-03 +/- 1.79E-02 U
-1.73E-03 +/- 1.04E-02 U
2.83E-03 +/- 9.38E-03 U
6.71E-03 +/- 1.51E-02 U
11/13/2024 6.12E-03 +/- 1.42E-02 U
-3.98E-03 +/- 1.84E-02 U
-6.51E-03 +/- 1.60E-02 U
5.91E-03 +/- 1.70E-02 U
2.07E-03 +/- 1.74E-02 U
11/20/2024
-1.89E-02 +/- 2.86E-02 U
-9.33E-03 +/- 3.63E-02 U
4.49E-06 +/- 1.96E-02 U
5.60E-03 +/- 2.27E-02 U
-8.61E-03 +/- 1.83E-02 U
11/26/2024
-3.97E-03 +/- 1.32E-02 U
1.00E-02 +/- 2.40E-02 U
-3.25E-03 +/- 1.07E-02 U
1.58E-02 +/- 1.66E-02 U
1.34E-02 +/- 1.69E-02 U
12/4/2024
-1.94E-02 +/- 2.49E-02 U
5.65E-03 +/- 2.46E-02 U
1.68E-02 +/- 1.81E-02 U
-7.19E-03 +/- 2.49E-02 U
3.53E-02 +/- 2.09E-02 UI 12/11/2024
-4.49E-03 +/- 1.22E-02 U
-7.06E-03 +/- 1.60E-02 U
4.64E-03 +/- 1.60E-02 U
1.66E-02 +/- 1.86E-02 U
8.11E-03 +/- 1.94E-02 U
12/18/2024
-2.91E-03 +/- 1.08E-02 U
-3.83E-03 +/- 1.28E-02 U
-9.83E-05 +/- 9.70E-03 U
6.47E-03 +/- 1.63E-02 U
2.03E-02 +/- 1.47E-02 UI 12/26/2024 7.24E-03 +/- 1.42E-02 U
-1.22E-02 +/- 2.16E-02 U
3.12E-03 +/- 1.71E-02 U
1.72E-02 +/- 2.83E-02 U
-7.35E-03 +/- 1.77E-02 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 52 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 11: Airborne Particulates: Gross Beta (pCi/m3)
Date/ Sample ID Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 1/3/2024 5.20E-02 +/- 4.94E-03 4.47E-02 +/- 4.77E-03 5.04E-02 +/- 5.29E-03 4.51E-02 +/- 4.68E-03 4.49E-02 +/- 4.80E-03 1/10/2024 6.64E-02 +/- 5.53E-03 4.80E-02 +/- 4.86E-03 4.90E-02 +/- 4.89E-03 4.81E-02 +/- 4.76E-03 5.19E-02 +/- 4.85E-03 1/17/2024 4.13E-02 +/- 4.43E-03 4.15E-02 +/- 4.61E-03 4.36E-02 +/- 4.75E-03 4.36E-02 +/- 4.58E-03 4.25E-02 +/- 4.40E-03 1/23/2024 4.65E-02 +/- 5.03E-03 5.74E-02 +/- 5.79E-03 5.29E-02 +/- 5.62E-03 4.86E-02 +/- 5.20E-03 1.67E-02 +/- 3.17E-03 1/31/2024 2.77E-02 +/- 3.45E-03 4.10E-02 +/- 4.06E-03 4.38E-02 +/- 4.22E-03 4.54E-02 +/- 4.52E-03 Missed Sample25 2/7/2024 2.98E-03 +/- 1.68E-03 M
2.87E-02 +/- 3.75E-03 2.89E-02 +/- 3.81E-03 3.05E-02 +/- 3.82E-03 3.34E-02 +/- 3.96E-03 2/13/2024 3.94E-02 +/- 4.99E-03 3.24E-02 +/- 4.34E-03 4.27E-02 +/- 5.10E-03 4.03E-02 +/- 5.02E-03 3.16E-02 +/- 4.30E-03 2/20/2024 3.38E-02 +/- 4.22E-03 3.56E-02 +/- 4.11E-03 3.22E-02 +/- 4.02E-03 3.82E-02 +/- 4.44E-03 3.19E-02 +/- 4.13E-03 2/28/2024 4.67E-02 +/- 4.54E-03 5.48E-02 +/- 4.91E-03 5.73E-02 +/- 5.34E-03 5.06E-02 +/- 4.72E-03 4.28E-02 +/- 4.15E-03 3/6/2024 4.13E-02 +/- 4.61E-03 3.48E-02 +/- 4.37E-03 3.49E-02 +/- 4.31E-03 3.53E-02 +/- 4.24E-03 3.85E-02 +/- 4.49E-03 3/12/2024 3.49E-02 +/- 4.67E-03 4.12E-02 +/- 5.03E-03 3.44E-02 +/- 4.73E-03 4.26E-02 +/- 5.07E-03 3.53E-02 +/- 4.71E-03 3/20/2024 3.02E-02 +/- 3.82E-03 2.60E-02 +/- 3.52E-03 2.86E-02 +/- 3.83E-03 2.60E-02 +/- 3.46E-03 2.08E-02 +/- 3.27E-03 3/27/2024 2.40E-02 +/- 3.72E-03 2.72E-02 +/- 3.87E-03 2.11E-02 +/- 3.60E-03 2.37E-02 +/- 3.54E-03 2.32E-02 +/- 3.68E-03 4/3/2024 3.41E-02 +/- 4.31E-03 3.24E-02 +/- 4.19E-03 3.06E-02 +/- 4.26E-03 2.91E-02 +/- 3.88E-03 3.45E-02 +/- 4.65E-03 4/10/2024 1.90E-02 +/- 3.30E-03 2.00E-02 +/- 3.35E-03 2.10E-02 +/- 3.69E-03 1.95E-02 +/- 3.32E-03 1.29E-02 +/- 2.67E-03 4/17/2024 3.54E-02 +/- 4.39E-03 2.80E-02 +/- 3.92E-03 3.17E-02 +/- 4.27E-03 2.27E-02 +/- 3.48E-03 2.67E-02 +/- 4.19E-03 4/24/2024 2.74E-02 +/- 3.85E-03 2.35E-02 +/- 3.57E-03 2.76E-02 +/- 3.99E-03 2.63E-02 +/- 3.76E-03 2.50E-02 +/- 3.71E-03 5/1/2024 1.57E-02 +/- 3.04E-03 Missed Sample26 1.67E-02 +/- 3.33E-03 1.45E-02 +/- 2.95E-03 1.62E-02 +/- 3.03E-03 5/8/2024 1.74E-02 +/- 3.21E-03 1.67E-02 +/- 3.04E-03 1.95E-02 +/- 3.26E-03 1.70E-02 +/- 3.03E-03 1.69E-02 +/- 3.10E-03 5/15/2024 Missed Sample27 2.17E-02 +/- 3.51E-03 2.00E-02 +/- 3.39E-03 1.78E-02 +/- 3.28E-03 2.02E-02 +/- 3.36E-03 5/22/2024 2.23E-02 +/- 3.63E-03 2.29E-02 +/- 3.42E-03 2.67E-02 +/- 3.85E-03 3.09E-02 +/- 4.15E-03 1.98E-02 +/- 3.58E-03 25 Sample pump was tripped with only 3 minutes recorded on the timer. Declaring missed sample due to possibility of partial sample.
26 Sample head was bumped and fell off the air sampler platform. A puff of dust was produced on impact indicating some loosely held particles came off. The sample was still collected but is counted as a missed sample due to likelihood of anomalous result.
27 Sample pump discovered out of operation. Pump timer indicated sample was not collected for required week-long sample period. This is a missed sample.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 53 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 11: Airborne Particulates: Gross Beta (pCi/m3)
Date/ Sample ID Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 5/29/2024 2.48E-02 +/- 3.74E-03 1.98E-02 +/- 3.28E-03 2.17E-02 +/- 3.41E-03 2.01E-02 +/- 3.28E-03 2.18E-02 +/- 3.50E-03 6/5/2024 2.41E-02 +/- 3.61E-03 2.22E-02 +/- 3.37E-03 2.51E-02 +/- 3.84E-03 2.76E-02 +/- 3.97E-03 3.60E-02 +/- 4.30E-03 6/12/2024 1.71E-02 +/- 3.20E-03 2.00E-02 +/- 3.27E-03 2.26E-02 +/- 3.82E-03 2.24E-02 +/- 3.60E-03 1.50E-02 +/- 3.04E-03 6/19/2024 2.74E-02 +/- 4.36E-03 2.20E-02 +/- 3.43E-03 2.68E-02 +/- 3.82E-03 2.21E-02 +/- 3.50E-03 2.36E-02 +/- 3.53E-03 6/26/2024 2.20E-02 +/- 3.73E-03 1.86E-02 +/- 3.14E-03 2.06E-02 +/- 3.29E-03 1.96E-02 +/- 3.29E-03 2.29E-02 +/- 3.89E-03 7/3/2024 2.05E-02 +/- 3.58E-03 1.98E-02 +/- 3.22E-03 1.89E-02 +/- 3.33E-03 2.10E-02 +/- 3.43E-03 2.11E-02 +/- 3.53E-03 7/10/2024 1.69E-02 +/- 3.12E-03 1.50E-02 +/- 2.93E-03 1.64E-02 +/- 3.03E-03 1.77E-02 +/- 2.99E-03 1.79E-02 +/- 3.04E-03 7/17/2024 2.91E-02 +/- 4.21E-03 3.15E-02 +/- 3.97E-03 2.95E-02 +/- 3.84E-03 3.45E-02 +/- 4.13E-03 2.91E-02 +/- 3.99E-03 7/24/2024 2.98E-02 +/- 4.20E-03 2.76E-02 +/- 3.77E-03 3.27E-02 +/- 4.15E-03 2.40E-02 +/- 3.39E-03 2.59E-02 +/- 3.74E-03 7/31/2024 4.66E-02 +/- 5.19E-03 4.69E-02 +/- 5.02E-03 3.33E-02 +/- 4.42E-03 3.55E-02 +/- 4.06E-03 3.76E-02 +/- 4.26E-03 8/7/2024 3.06E-02 +/- 4.09E-03 2.66E-02 +/- 3.75E-03 2.14E-02 +/- 3.19E-03 2.87E-02 +/- 4.02E-03 2.60E-02 +/- 3.61E-03 8/14/2024 2.48E-02 +/- 3.92E-03 2.78E-02 +/- 4.20E-03 2.84E-02 +/- 4.03E-03 2.36E-02 +/- 3.63E-03 3.40E-02 +/- 4.50E-03 8/21/2024 4.31E-02 +/- 5.04E-03 3.01E-02 +/- 4.11E-03 3.19E-02 +/- 3.86E-03 2.81E-02 +/- 3.92E-03 3.97E-02 +/- 4.60E-03 8/28/2024 6.06E-02 +/- 5.88E-03 4.97E-02 +/- 5.15E-03 3.86E-02 +/- 4.17E-03 4.74E-02 +/- 4.84E-03 4.46E-02 +/- 4.85E-03 9/4/2024 2.58E-02 +/- 3.78E-03 2.64E-02 +/- 3.95E-03 2.97E-02 +/- 3.96E-03 2.36E-02 +/- 3.59E-03 2.32E-02 +/- 3.63E-03 9/11/2024 3.80E-02 +/- 4.43E-03 3.67E-02 +/- 4.50E-03 3.68E-02 +/- 4.08E-03 3.44E-02 +/- 4.15E-03 4.19E-02 +/- 4.62E-03 9/18/2024 5.84E-02 +/- 5.71E-03 5.70E-02 +/- 5.81E-03 5.41E-02 +/- 5.26E-03 4.57E-02 +/- 4.86E-03 5.72E-02 +/- 5.67E-03 9/25/2024 4.49E-02 +/- 5.05E-03 4.00E-02 +/- 4.89E-03 3.03E-02 +/- 3.74E-03 4.02E-02 +/- 4.55E-03 3.66E-02 +/- 4.61E-03 10/2/2024 4.65E-02 +/- 5.12E-03 3.60E-02 +/- 4.64E-03 3.33E-02 +/- 3.96E-03 3.78E-02 +/- 4.39E-03 3.83E-02 +/- 4.69E-03 10/9/2024 3.14E-02 +/- 4.34E-03 2.90E-02 +/- 4.27E-03 2.67E-02 +/- 3.80E-03 3.30E-02 +/- 4.15E-03 2.98E-02 +/- 4.24E-03 10/16/2024 6.95E-02 +/- 6.21E-03 4.42E-02 +/- 5.07E-03 3.06E-02 +/- 3.76E-03 4.29E-02 +/- 4.92E-03 4.32E-02 +/- 5.00E-03 10/23/2024 7.26E-03 +/- 2.47E-03 M
5.97E-02 +/- 5.88E-03 4.85E-02 +/- 5.22E-03 5.61E-02 +/- 5.31E-03 5.58E-02 +/- 5.59E-03 10/30/2024 6.99E-02 +/- 6.32E-03 5.69E-02 +/- 5.81E-03 5.42E-02 +/- 5.41E-03 5.38E-02 +/- 5.15E-03 5.67E-02 +/- 5.73E-03 11/6/2024 3.38E-02 +/- 4.14E-03 4.11E-02 +/- 4.86E-03 3.13E-02 +/- 3.79E-03 4.04E-02 +/- 4.69E-03 4.25E-02 +/- 4.98E-03 11/13/2024 4.31E-02 +/- 4.63E-03 4.23E-02 +/- 4.94E-03 3.90E-02 +/- 4.21E-03 5.11E-02 +/- 5.50E-03 4.87E-02 +/- 5.32E-03 11/20/2024 1.02E-01 +/- 7.30E-03 5.35E-02 +/- 5.55E-03 3.87E-02 +/- 4.20E-03 5.67E-02 +/- 5.94E-03 4.80E-02 +/- 5.30E-03
Annual Radiological Environmental Operating Report YEAR: 2024 Page 54 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 11: Airborne Particulates: Gross Beta (pCi/m3)
Date/ Sample ID Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 11/26/2024 2.61E-02 +/- 3.99E-03 3.20E-02 +/- 5.01E-03 2.40E-02 +/- 3.88E-03 2.88E-02 +/- 4.59E-03 3.40E-02 +/- 5.16E-03 12/4/2024 4.28E-02 +/- 4.32E-03 5.24E-02 +/- 5.17E-03 3.87E-02 +/- 3.92E-03 5.38E-02 +/- 5.20E-03 5.70E-02 +/- 5.37E-03 12/11/2024 3.90E-02 +/- 4.28E-03 4.95E-02 +/- 5.33E-03 3.61E-02 +/- 4.11E-03 5.52E-02 +/- 5.66E-03 5.04E-02 +/- 5.33E-03 12/18/2024 5.52E-02 +/- 5.16E-03 7.26E-02 +/- 6.41E-03 6.56E-02 +/- 5.73E-03 6.83E-02 +/- 6.15E-03 6.51E-02 +/- 6.05E-03 12/26/2024 4.81E-02 +/- 4.56E-03 6.63E-02 +/- 5.77E-03 5.57E-02 +/- 4.91E-03 6.14E-02 +/- 5.52E-03 5.58E-02 +/- 5.30E-03
Annual Radiological Environmental Operating Report YEAR: 2024 Page 55 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 12: Quarterly Gamma Isotopic Data - Air Station M-1 (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140 2.35E-03 +/- 4.35E-03 U
-6.31E-03 +/- 7.81E-03 U
6.20E-03 +/- 8.49E-03 U
-4.89E-03 +/- 1.14E-02 U
Beryllium-7 5.11E-02 +/- 7.85E-03 5.65E-02 +/- 9.96E-03 6.28E-02 +/- 9.63E-03 9.00E-02 +/- 1.30E-02 Cerium-141 1.08E-04 +/- 4.16E-04 U
1.20E-05 +/- 6.97E-04 U
1.70E-04 +/- 6.93E-04 U
1.35E-04 +/- 7.26E-04 U
Cerium-144
-4.45E-04 +/- 9.15E-04 U
-3.68E-04 +/- 1.27E-03 U
4.42E-04 +/- 1.19E-03 U
-2.01E-04 +/- 1.07E-03 U
Cesium-134 6.33E-05 +/- 2.69E-04 U
4.95E-07 +/- 3.62E-04 U
-1.62E-04 +/- 3.04E-04 U
2.81E-05 +/- 2.92E-04 U
Cesium-137 3.98E-05 +/- 2.59E-04 U
1.30E-04 +/- 2.70E-04 U
3.13E-04 +/- 2.76E-04 U
-1.22E-04 +/- 3.22E-04 U
Cobalt-58
-7.59E-05 +/- 3.38E-04 U
4.65E-04 +/- 4.47E-04 U
3.38E-05 +/- 3.26E-04 U
1.29E-04 +/- 4.24E-04 U
Cobalt-60 1.37E-04 +/- 3.39E-04 U
2.49E-04 +/- 3.36E-04 U
4.42E-04 +/- 2.61E-04 U
9.99E-05 +/- 3.08E-04 U
Lanthanum-140
-3.58E-04 +/- 1.48E-03 U
-1.56E-03 +/- 2.84E-03 U
3.22E-03 +/- 3.81E-03 U
-1.50E-03 +/- 5.49E-03 U
Manganese-54 3.58E-05 +/- 3.12E-04 U
-2.54E-04 +/- 4.07E-04 U
-4.91E-05 +/- 3.00E-04 U
-5.64E-05 +/- 3.16E-04 U
Niobium-95 4.03E-04 +/- 3.92E-04 UI
-4.11E-05 +/- 4.57E-04 U
-2.83E-04 +/- 4.43E-04 U
3.06E-04 +/- 4.34E-04 U
Ruthenium-103 1.19E-04 +/- 3.67E-04 U
6.24E-05 +/- 5.06E-04 U
1.89E-04 +/- 5.13E-04 U
1.06E-04 +/- 5.67E-04 U
Ruthenium-106
-1.98E-03 +/- 2.39E-03 U
-6.52E-04 +/- 2.51E-03 U
-9.43E-04 +/- 2.42E-03 U
1.07E-03 +/- 2.31E-03 U
Zinc-65
-4.44E-05 +/- 6.22E-04 U
-1.51E-04 +/- 8.45E-04 U
-5.00E-05 +/- 6.63E-04 U
-4.45E-04 +/- 7.44E-04 U
Zirconium-95 3.96E-04 +/- 5.48E-04 U
4.58E-04 +/- 7.37E-04 U
-2.56E-04 +/- 6.96E-04 U
6.36E-04 +/- 7.80E-04 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 56 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 13: Quarterly Gamma Isotopic Data - Air Station M-2 (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140 5.91E-03 +/- 6.11E-03 U
2.37E-02 +/- 1.25E-02 UI 3.76E-03 +/- 9.21E-03 U
-3.91E-03 +/- 2.63E-02 U
Beryllium-7 4.33E-02 +/- 7.64E-03 5.45E-02 +/- 9.46E-03 6.68E-02 +/- 1.10E-02 6.51E-02 +/- 1.81E-02 Cerium-141 2.38E-05 +/- 4.64E-04 U
-4.86E-04 +/- 7.27E-04 U
3.70E-04 +/- 6.82E-04 U
-6.09E-04 +/- 1.30E-03 U
Cerium-144
-4.44E-04 +/- 9.89E-04 U
1.17E-03 +/- 2.35E-03 U
-9.69E-04 +/- 1.36E-03 U
-6.87E-04 +/- 2.08E-03 U
Cesium-134
-1.37E-04 +/- 2.82E-04 U
2.39E-04 +/- 3.74E-04 U
3.73E-04 +/- 3.71E-04 U
1.80E-04 +/- 6.97E-04 U
-1.83E-04 +/- 2.32E-04 U
3.50E-04 +/- 2.81E-04 U
1.36E-04 +/- 3.04E-04 U
-4.22E-04 +/- 6.81E-04 U
Cobalt-58
-4.84E-04 +/- 3.02E-04 U
8.34E-05 +/- 4.19E-04 U
-2.05E-05 +/- 4.17E-04 U
6.10E-04 +/- 8.01E-04 U
-1.38E-04 +/- 2.56E-04 U
3.49E-04 +/- 4.04E-04 U
-1.62E-04 +/- 3.34E-04 U
1.74E-04 +/- 8.92E-04 U
Lanthanum-140
-9.55E-04 +/- 1.35E-03 U
-7.72E-04 +/- 5.26E-03 U
4.10E-04 +/- 3.12E-03 U
-5.79E-04 +/- 7.03E-03 U
-1.20E-04 +/- 2.31E-04 U
-2.02E-04 +/- 3.72E-04 U
-3.71E-05 +/- 3.48E-04 U
6.31E-04 +/- 7.18E-04 U
Niobium-95 4.84E-05 +/- 2.83E-04 U
-1.04E-04 +/- 3.99E-04 U
8.59E-05 +/- 4.21E-04 U
1.75E-03 +/- 1.24E-03 UI Ruthenium-103
-2.96E-04 +/- 2.91E-04 U
-2.13E-05 +/- 6.50E-04 U
6.86E-04 +/- 6.59E-04 UI
-1.90E-04 +/- 1.03E-03 U
Ruthenium-106 5.89E-04 +/- 1.95E-03 U
-4.08E-04 +/- 2.69E-03 U
4.52E-04 +/- 2.57E-03 U
4.99E-03 +/- 5.46E-03 U
Zinc-65 1.19E-03 +/- 7.24E-04 UI 5.61E-05 +/- 8.17E-04 U
-5.99E-04 +/- 1.03E-03 U
1.39E-04 +/- 1.57E-03 U
Zirconium-95 9.47E-05 +/- 4.16E-04 U
-2.83E-04 +/- 6.98E-04 U
-3.62E-04 +/- 9.25E-04 U
-6.70E-04 +/- 1.87E-03 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 57 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 14: Quarterly Gamma Isotopic Data - Air Station M-3 (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140 2.75E-03 +/- 3.85E-03 U
7.81E-03 +/- 7.21E-03 U
-4.08E-03 +/- 7.83E-03 U
-1.99E-04 +/- 1.28E-02 U
Beryllium-7 4.51E-02 +/- 6.12E-03 5.51E-02 +/- 1.04E-02 6.76E-02 +/- 9.04E-03 9.01E-02 +/- 1.21E-02 Cerium-141 5.72E-05 +/- 4.69E-04 U
-5.48E-05 +/- 5.55E-04 U
-2.93E-05 +/- 5.84E-04 U
8.48E-05 +/- 1.17E-03 U
Cerium-144 4.20E-04 +/- 1.07E-03 U
-1.94E-04 +/- 9.47E-04 U
7.10E-04 +/- 9.93E-04 U
-3.35E-04 +/- 9.60E-04 U
Cesium-134 7.17E-05 +/- 2.56E-04 U
1.78E-04 +/- 2.78E-04 U
8.91E-05 +/- 2.64E-04 U
1.08E-04 +/- 3.48E-04 U
Cesium-137 6.79E-06 +/- 2.07E-04 U
5.76E-05 +/- 2.68E-04 U
1.52E-04 +/- 2.29E-04 U
4.08E-04 +/- 4.76E-04 U
Cobalt-58 1.66E-04 +/- 2.92E-04 U
-1.29E-04 +/- 3.68E-04 U
2.34E-04 +/- 4.39E-04 U
1.22E-04 +/- 4.59E-04 U
-8.99E-06 +/- 2.57E-04 U
0.00E+00 +/- 2.63E-04 U
-2.34E-04 +/- 2.64E-04 U
-2.35E-04 +/- 3.42E-04 U
Lanthanum-140
-1.69E-03 +/- 1.64E-03 U
-4.73E-03 +/- 3.74E-03 U
-3.00E-03 +/- 3.79E-03 U
-5.24E-04 +/- 5.88E-03 U
Manganese-54 9.00E-05 +/- 2.63E-04 U
-8.10E-05 +/- 2.63E-04 U
-1.10E-04 +/- 1.94E-04 U
-2.28E-04 +/- 3.04E-04 U
Niobium-95 2.87E-04 +/- 3.39E-04 U
1.48E-04 +/- 3.30E-04 U
-2.30E-04 +/- 4.18E-04 U
-5.32E-06 +/- 5.00E-04 U
Ruthenium-103 1.61E-04 +/- 3.24E-04 U
3.63E-05 +/- 3.77E-04 U
-3.82E-05 +/- 3.58E-04 U
-3.42E-04 +/- 5.02E-04 U
Ruthenium-106
-5.11E-04 +/- 2.11E-03 U
5.79E-04 +/- 1.92E-03 U
1.03E-03 +/- 2.00E-03 U
1.31E-03 +/- 2.18E-03 U
Zinc-65
-1.17E-04 +/- 5.36E-04 U
4.45E-05 +/- 6.87E-04 U
-2.69E-05 +/- 4.84E-04 U
3.09E-04 +/- 7.92E-04 U
Zirconium-95
-6.03E-05 +/- 5.17E-04 U
4.59E-04 +/- 6.50E-04 U
2.33E-04 +/- 5.53E-04 U
2.28E-04 +/- 9.76E-04 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 58 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 15: Quarterly Gamma Isotopic Data - Air Station M-4 (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140 4.42E-04 +/- 3.77E-03 U
-5.83E-04 +/- 1.03E-02 U
2.84E-03 +/- 9.91E-03 U
1.33E-02 +/- 1.21E-02 U
Beryllium-7 4.84E-02 +/- 6.10E-03 5.19E-02 +/- 1.07E-02 6.19E-02 +/- 8.75E-03 8.26E-02 +/- 1.03E-02 Cerium-141
-2.43E-05 +/- 4.45E-04 U
2.76E-04 +/- 1.14E-03 U
1.35E-04 +/- 7.60E-04 U
-1.27E-03 +/- 7.82E-04 U
Cerium-144 8.18E-05 +/- 9.21E-04 U
-8.91E-04 +/- 1.39E-03 U
1.00E-04 +/- 1.16E-03 U
2.92E-04 +/- 1.04E-03 U
Cesium-134
-1.97E-05 +/- 2.92E-04 U
-3.99E-05 +/- 3.57E-04 U
-6.98E-05 +/- 3.58E-04 U
3.48E-04 +/- 2.87E-04 U
-6.74E-05 +/- 2.34E-04 U
-1.18E-05 +/- 3.01E-04 U
9.65E-05 +/- 3.03E-04 U
-6.79E-05 +/- 2.85E-04 U
Cobalt-58 1.41E-04 +/- 2.88E-04 U
3.73E-04 +/- 4.91E-04 U
3.43E-05 +/- 3.44E-04 U
1.79E-04 +/- 3.88E-04 U
Cobalt-60 1.47E-04 +/- 2.59E-04 U
9.86E-05 +/- 3.51E-04 U
2.01E-04 +/- 3.38E-04 U
6.46E-05 +/- 2.84E-04 U
Lanthanum-140 2.07E-04 +/- 2.01E-03 U
-1.20E-03 +/- 4.10E-03 U
-1.81E-03 +/- 3.93E-03 U
2.25E-03 +/- 5.86E-03 U
Manganese-54 1.28E-04 +/- 3.29E-04 U
-1.41E-04 +/- 3.05E-04 U
-2.89E-04 +/- 2.89E-04 U
2.02E-04 +/- 2.83E-04 U
Niobium-95
-3.72E-04 +/- 3.05E-04 U
-2.81E-05 +/- 4.60E-04 U
1.46E-04 +/- 3.63E-04 U
3.48E-04 +/- 3.76E-04 U
Ruthenium-103
-8.24E-05 +/- 2.82E-04 U
5.18E-05 +/- 5.21E-04 U
-1.66E-04 +/- 5.07E-04 U
8.13E-05 +/- 3.89E-04 U
Ruthenium-106 2.20E-04 +/- 2.07E-03 U
1.86E-03 +/- 2.77E-03 U
5.73E-04 +/- 2.47E-03 U
-8.47E-04 +/- 2.61E-03 U
Zinc-65
-1.03E-04 +/- 5.98E-04 U
2.48E-04 +/- 7.04E-04 U
9.42E-04 +/- 6.83E-04 U
2.36E-04 +/- 8.28E-04 U
Zirconium-95
-6.03E-04 +/- 5.76E-04 U
1.87E-04 +/- 7.95E-04 U
-5.57E-05 +/- 6.97E-04 U
-5.96E-04 +/- 8.82E-04 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 59 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 16: Quarterly Gamma Isotopic Data - Air Station M-5 (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140
-1.79E-04 +/- 3.41E-03 U
1.14E-03 +/- 1.20E-02 U
1.93E-03 +/- 8.83E-03 U
-1.59E-03 +/- 1.22E-02 U
Beryllium-7 4.60E-02 +/- 6.78E-03 5.30E-02 +/- 1.22E-02 6.05E-02 +/- 8.69E-03 8.22E-02 +/- 1.19E-02 Cerium-141 4.07E-04 +/- 7.23E-04 U
-5.58E-04 +/- 9.14E-04 U
-2.76E-04 +/- 7.93E-04 U
4.09E-05 +/- 7.50E-04 U
Cerium-144
-7.86E-04 +/- 9.50E-04 U
-4.74E-04 +/- 1.46E-03 U
-5.09E-04 +/- 1.31E-03 U
6.13E-04 +/- 1.28E-03 U
Cesium-134 8.36E-06 +/- 2.20E-04 U
-9.94E-05 +/- 3.92E-04 U
3.13E-04 +/- 4.62E-04 U
1.55E-04 +/- 3.81E-04 U
-3.70E-05 +/- 2.08E-04 U
1.17E-05 +/- 2.95E-04 U
1.47E-04 +/- 2.41E-04 U
1.94E-04 +/- 2.65E-04 U
Cobalt-58 4.38E-05 +/- 2.66E-04 U
3.67E-04 +/- 5.27E-04 U
3.90E-05 +/- 2.88E-04 U
4.65E-05 +/- 5.13E-04 U
-1.89E-04 +/- 2.36E-04 U
3.26E-04 +/- 1.67E-04 U
-7.74E-05 +/- 2.80E-04 U
9.92E-05 +/- 3.01E-04 U
Lanthanum-140
-9.97E-04 +/- 1.35E-03 U
2.92E-03 +/- 5.28E-03 U
-3.90E-04 +/- 4.22E-03 U
-2.16E-03 +/- 3.75E-03 U
Manganese-54 2.53E-05 +/- 2.40E-04 U
1.39E-04 +/- 2.91E-04 U
1.48E-04 +/- 2.93E-04 U
-1.52E-04 +/- 3.95E-04 U
Niobium-95
-1.33E-04 +/- 3.70E-04 U
6.10E-04 +/- 4.86E-04 U
1.42E-04 +/- 3.58E-04 U
-2.87E-04 +/- 5.49E-04 U
Ruthenium-103
-6.23E-05 +/- 3.16E-04 U
1.97E-04 +/- 5.30E-04 U
-1.04E-07 +/- 4.59E-04 U
1.15E-04 +/- 4.15E-04 U
Ruthenium-106 8.84E-04 +/- 1.90E-03 U
9.66E-05 +/- 3.52E-03 U
1.22E-03 +/- 2.11E-03 U
-1.06E-03 +/- 2.78E-03 U
Zinc-65
-5.05E-04 +/- 6.68E-04 U
5.13E-04 +/- 8.57E-04 U
-6.59E-04 +/- 7.01E-04 U
-5.00E-04 +/- 6.39E-04 U
Zirconium-95 1.96E-04 +/- 4.18E-04 U
1.30E-04 +/- 8.72E-04 U
2.27E-04 +/- 5.75E-04 U
-2.00E-04 +/- 7.95E-04 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 60 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 17: Sediment Gamma Isotopic Data - M-8c Upstream of Plant (pCi/kg)
Nuclide Q1 Q4 Barium-140 2.71E+01 +/- 1.83E+02 U
8.62E+01 +/- 4.47E+02 U
Beryllium-7 3.35E+02 +/- 1.95E+02 8.27E+01 +/- 4.42E+02 U
Cerium-144
-8.12E+01 +/- 7.27E+01 U
4.27E+01 +/- 1.71E+02 U
Cesium-134 2.27E+01 +/- 1.71E+01 U
3.83E+01 +/- 4.47E+01 U
Cesium-137 1.84E+01 +/- 1.67E+01 U
-3.44E+00 +/- 3.89E+01 U
Cobalt-58
-1.21E+01 +/- 2.15E+01 U
-1.48E+01 +/- 4.71E+01 U
Cobalt-60 4.67E+00 +/- 1.77E+01 U
5.39E-01 +/- 4.89E+01 U
Iron-59
-1.35E+01 +/- 5.00E+01 U
-6.24E+01 +/- 1.15E+02 U
Lanthanum-140
-2.43E+01 +/- 6.01E+01 U
5.28E+01 +/- 1.36E+02 U
-6.77E+00 +/- 2.06E+01 U
3.28E+01 +/- 3.76E+01 U
Niobium-95 1.67E+01 +/- 1.92E+01 U
6.62E+00 +/- 3.54E+01 U
Potassium-40 1.10E+04 +/- 7.90E+02 1.20E+04 +/- 1.66E+03 Ruthenium-103
-3.54E+00 +/- 1.72E+01 U
1.13E+01 +/- 4.40E+01 U
Ruthenium-106 6.95E+01 +/- 1.15E+02 U
1.17E+02 +/- 3.13E+02 U
Zinc-65 1.03E+01 +/- 4.49E+01 U
4.89E+01 +/- 1.24E+02 U
Zirconium-95 1.10E+01 +/- 3.44E+01 U
3.10E+00 +/- 7.70E+01 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 61 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 18: Sediment Gamma Isotopic Data - M-9 Downstream of Plant (pCi/kg)
Nuclide Q1 Q4 Barium-140
-5.44E+01 +/- 5.60E+02 U
-1.13E+02 +/- 2.75E+02 U
Beryllium-7
-4.52E+01 +/- 3.19E+02 U
1.77E+02 +/- 2.21E+02 U
Cerium-144
-6.52E+00 +/- 1.73E+02 U
7.18E+01 +/- 1.13E+02 U
Cesium-134
-1.86E+01 +/- 4.22E+01 U
4.61E+00 +/- 3.23E+01 U
Cesium-137 1.15E+02 +/- 6.40E+01 M 1.86E+01 +/- 2.64E+01 U
Cobalt-58 2.91E+01 +/- 3.63E+01 U
4.53E+00 +/- 3.23E+01 U
Cobalt-60 2.02E+01 +/- 4.69E+01 U
-1.27E+01 +/- 2.60E+01 U
Iron-59 7.02E+01 +/- 1.17E+02 U
2.99E+01 +/- 7.49E+01 U
Lanthanum-140 3.67E+01 +/- 1.68E+02 U
-2.68E+00 +/- 1.30E+02 U
Manganese-54 2.85E+01 +/- 3.62E+01 U
3.63E+00 +/- 2.58E+01 U
Niobium-95
-1.36E+00 +/- 4.25E+01 U
-9.13E+00 +/- 3.23E+01 U
Potassium-40 1.01E+04 +/- 1.64E+03 1.11E+04 +/- 1.39E+03 UI Ruthenium-103 1.57E+00 +/- 4.81E+01 U
5.67E+00 +/- 3.32E+01 U
Ruthenium-106 8.55E+01 +/- 2.92E+02 U
-1.21E+02 +/- 1.77E+02 U
Zinc-65
-1.38E+02 +/- 1.36E+02 U
-2.59E+01 +/- 1.16E+02 U
Zirconium-95
-4.81E+01 +/- 7.78E+01 U
-1.16E+01 +/- 5.41E+01 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 62 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 19: Sediment Gamma Isotopic Data - M-15 Montissippi Park (pCi/kg)
Nuclide Q1 Q4 Barium-140 3.30E+02 +/- 2.79E+02 U
-3.18E+01 +/- 2.93E+02 U
Beryllium-7 4.52E+02 +/- 2.73E+02 U
1.35E+02 +/- 2.27E+02 U
Cerium-144
-4.13E+01 +/- 9.51E+01 U
-5.63E+01 +/- 1.11E+02 U
Cesium-134 2.48E+01 +/- 3.45E+01 U
2.50E+01 +/- 2.41E+01 U
Cesium-137 2.54E+01 +/- 5.18E+01 U
5.23E+01 +/- 6.03E+01 UI Cobalt-58 1.32E+01 +/- 3.23E+01 U
-1.95E+01 +/- 2.71E+01 U
Cobalt-60 1.23E+01 +/- 3.05E+01 U
3.49E+01 +/- 2.78E+01 U
Iron-59 1.15E+01 +/- 9.15E+01 U
4.22E+01 +/- 6.67E+01 U
Lanthanum-140
-4.81E+01 +/- 1.18E+02 U
-4.60E-01 +/- 1.17E+02 U
-6.65E+00 +/- 2.70E+01 U
7.31E+00 +/- 2.44E+01 U
Niobium-95 4.72E+00 +/- 3.26E+01 U
-5.43E+00 +/- 3.16E+01 U
Potassium-40 1.22E+04 +/- 1.28E+03 1.15E+04 +/- 1.39E+03 Ruthenium-103
-5.38E+00 +/- 2.95E+01 U
4.30E+00 +/- 2.83E+01 U
Ruthenium-106 1.66E+02 +/- 2.12E+02 U
1.90E+01 +/- 2.08E+02 U
Zinc-65 3.43E+01 +/- 9.86E+01 U
3.39E+01 +/- 5.44E+01 U
Zirconium-95 4.29E+00 +/- 5.29E+01 U
3.23E+00 +/- 5.20E+01 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 63 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 20: Tissue-Fish Gamma Isotopic Data - M-8c Upstream of Plant (pCi/kg, wet)
Nuclide May September Fish 1 Fish 2 Fish 3 Fish 1 Barium-140
-9.65E+01 +/- 1.13E+02 U
2.78E+01 +/- 6.27E+01 U
-5.69E+01 +/- 1.25E+02 U
-2.57E+01 +/- 2.79E+01 U
Cerium-144
-2.12E+01 +/- 4.73E+01 U
-9.00E+00 +/- 2.42E+01 U
-1.74E+01 +/- 3.52E+01 U
-3.70E+00 +/- 2.99E+01 U
Cesium-134 6.40E+00 +/- 1.16E+01 U
6.76E-01 +/- 5.97E+00 U
4.52E-01 +/- 1.21E+01 U
-1.37E+00 +/- 5.19E+00 U
-2.22E+00 +/- 1.06E+01 U
1.24E+00 +/- 5.36E+00 U
1.09E+01 +/- 1.27E+01 U
7.33E+00 +/- 5.32E+00 U
Cobalt-58 5.91E+00 +/- 1.17E+01 U
3.13E-01 +/- 4.71E+00 U
-1.75E+01 +/- 1.59E+01 U
-1.44E+00 +/- 4.56E+00 U
Cobalt-60 9.09E+00 +/- 1.68E+01 U
-3.13E-01 +/- 5.30E+00 U
-2.86E+00 +/- 1.54E+01 U
-2.25E+00 +/- 7.98E+00 U
Iron-59 2.23E+00 +/- 3.70E+01 U
1.21E+00 +/- 1.42E+01 U
3.99E+01 +/- 3.97E+01 U
-3.20E+00 +/- 1.15E+01 U
Lanthanum-140
-3.85E+01 +/- 4.57E+01 U
-9.16E+00 +/- 1.65E+01 U
-2.56E+01 +/- 5.85E+01 U
-5.17E+00 +/- 7.76E+00 U
Manganese-54 6.45E+00 +/- 1.03E+01 U
-3.43E+00 +/- 4.64E+00 U
5.46E-01 +/- 9.72E+00 U
-2.90E+00 +/- 5.33E+00 U
Niobium-95
-1.02E+01 +/- 1.35E+01 U
1.09E+00 +/- 6.13E+00 U
-3.35E+00 +/- 1.25E+01 U
-3.23E+00 +/- 5.59E+00 U
Potassium-40 3.67E+03 +/- 5.17E+02 3.10E+03 +/- 2.76E+02 2.90E+03 +/- 5.66E+02 3.18E+03 +/- 3.13E+02 Zinc-65 4.38E-01 +/- 2.40E+01 U
7.18E+00 +/- 1.60E+01 U
-1.23E+01 +/- 3.41E+01 U
3.03E+00 +/- 1.32E+01 U
Zirconium-95 2.79E+01 +/- 2.64E+01 U
-9.05E+00 +/- 8.87E+00 U
2.44E+00 +/- 2.45E+01 U
3.15E+00 +/- 9.76E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 64 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 21: Tissue-Fish Gamma Isotopic Data - M-9 Downstream of Plant (pCi/kg, wet)
Nuclide May September Fish 1 Fish 2 Fish 3 Fish 1 Barium-140
-8.52E+01 +/- 1.62E+02 U
2.64E+01 +/- 1.61E+02 U
2.26E+01 +/- 2.39E+02 U
1.57E+01 +/- 2.20E+01 U
Cerium-144 1.20E+02 +/- 1.61E+02 UI
-2.51E+01 +/- 8.87E+01 U
-5.39E+01 +/- 1.31E+02 U
5.61E-01 +/- 2.46E+01 U
Cesium-134
-3.07E-01 +/- 1.52E+01 U
3.78E+00 +/- 1.94E+01 U
-2.19E+01 +/- 2.39E+01 U
2.20E+00 +/- 5.36E+00 U
Cesium-137 2.73E+00 +/- 1.60E+01 U
9.34E+00 +/- 1.73E+01 U
4.79E+00 +/- 2.47E+01 U
-3.97E+00 +/- 4.60E+00 U
Cobalt-58
-7.41E+00 +/- 1.76E+01 U
1.70E+01 +/- 2.01E+01 U
1.34E+01 +/- 2.51E+01 U
-1.95E+00 +/- 4.52E+00 U
Cobalt-60 9.25E+00 +/- 1.21E+01 U
-2.34E+00 +/- 1.44E+01 U
-9.53E+00 +/- 3.32E+01 U
-6.65E+00 +/- 6.34E+00 U
Iron-59 2.75E+01 +/- 4.40E+01 U
4.67E+00 +/- 4.17E+01 U
-1.30E+01 +/- 6.65E+01 U
7.63E+00 +/- 9.79E+00 U
Lanthanum-140
-7.14E+00 +/- 6.43E+01 U
1.48E+01 +/- 5.56E+01 U
4.63E+01 +/- 9.69E+01 U
1.91E+00 +/- 5.33E+00 U
-3.50E+00 +/- 1.98E+01 U
-3.71E+00 +/- 1.35E+01 U
-1.75E+01 +/- 2.32E+01 U
-3.81E+00 +/- 4.75E+00 U
Niobium-95
-1.90E+00 +/- 1.72E+01 U
-2.28E+00 +/- 1.57E+01 U
7.96E+00 +/- 2.81E+01 U
-3.42E+00 +/- 5.53E+00 U
Potassium-40 3.02E+03 +/- 5.27E+02 3.48E+03 +/- 6.07E+02 4.33E+03 +/- 6.57E+02 3.07E+03 +/- 2.70E+02 Zinc-65
-1.83E+01 +/- 4.46E+01 U
9.82E-01 +/- 3.56E+01 U
1.39E+01 +/- 5.78E+01 U
1.72E-01 +/- 1.02E+01 U
Zirconium-95 4.05E+01 +/- 2.79E+01 U
2.32E+01 +/- 2.95E+01 U
4.67E+01 +/- 5.05E+01 U
1.13E+00 +/- 7.52E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 65 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 22: Tissue-Plant Gamma Isotopic Data - M-41 Training Center (pCi/kg)
Nuclide June July August September Cesium-134
-1.54E+00 +/- 1.83E+01 U
-6.04E-01 +/- 8.37E+00 U
3.67E-01 +/- 1.05E+01 U
-5.71E+00 +/- 1.41E+01 U
-1.61E+01 +/- 1.50E+01 U
1.04E+00 +/- 1.93E+01 U
8.94E+00 +/- 1.00E+01 U
1.25E+01 +/- 1.63E+01 U
Cobalt-58 4.52E+00 +/- 1.52E+01 U
5.40E+00 +/- 7.97E+00 U
4.30E+00 +/- 9.18E+00 U
3.28E+01 +/- 3.67E+01 U
Cobalt-60 2.28E+01 +/- 1.75E+01 U
-5.17E-02 +/- 1.18E+01 U
-1.93E+01 +/- 2.35E+01 U
-2.61E+00 +/- 1.61E+01 U
-2.00E+00 +/- 3.00E+01 U
1.71E+00 +/- 1.17E+01 U
-5.46E+00 +/- 2.04E+01 U
-7.11E+00 +/- 3.44E+01 U
Iron-59
-6.45E+00 +/- 3.27E+01 U
1.15E+01 +/- 1.90E+01 U
1.33E+00 +/- 2.23E+01 U
-1.27E+01 +/- 4.68E+01 U
Manganese-54 6.61E+00 +/- 1.46E+01 U
6.58E+00 +/- 9.82E+00 U
9.36E-01 +/- 1.00E+01 U
1.93E+00 +/- 1.65E+01 U
Niobium-95
-1.68E-01 +/- 1.54E+01 U
-4.48E+00 +/- 1.08E+01 U
4.90E+00 +/- 1.06E+01 U
-1.57E+01 +/- 1.94E+01 U
Zinc-65 1.97E+01 +/- 3.33E+01 U
-8.53E+00 +/- 1.93E+01 U
-4.19E+00 +/- 2.29E+01 U
-9.58E+00 +/- 4.59E+01 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 66 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 23: Tissue-Plant Gamma Isotopic Data - M-42 Biology Station Road (pCi/kg)
Nuclide June July August September Cesium-134
-8.68E+00 +/- 1.61E+01 U
3.36E+00 +/- 9.20E+00 U
7.01E+00 +/- 9.37E+00 U
4.47E+00 +/- 1.95E+01 U
Cesium-137 6.92E+00 +/- 1.68E+01 U
1.17E+00 +/- 7.64E+00 U
1.03E+01 +/- 9.06E+00 U
-8.73E+00 +/- 1.80E+01 U
Cobalt-58 2.47E+00 +/- 1.58E+01 U
3.67E+00 +/- 8.00E+00 U
-5.74E+00 +/- 8.97E+00 U
6.19E+00 +/- 1.73E+01 U
Cobalt-60 2.28E+00 +/- 1.57E+01 U
-1.63E+00 +/- 8.28E+00 U
-6.93E+00 +/- 9.33E+00 U
1.81E+00 +/- 1.64E+01 U
Iodine-131 6.14E+00 +/- 2.79E+01 U
-2.01E+00 +/- 9.66E+00 U
-1.14E+00 +/- 2.09E+01 U
-6.39E+00 +/- 3.15E+01 U
Iron-59 8.01E+00 +/- 3.22E+01 U
-1.04E-01 +/- 1.54E+01 U
-2.76E+00 +/- 1.89E+01 U
-1.91E+01 +/- 3.06E+01 U
-9.74E+00 +/- 1.48E+01 U
6.09E+00 +/- 7.94E+00 U
-2.25E+00 +/- 7.95E+00 U
-7.09E+00 +/- 1.51E+01 U
Niobium-95 4.97E+00 +/- 1.37E+01 U
-6.16E+00 +/- 8.35E+00 U
1.23E+00 +/- 8.68E+00 U
-6.95E+00 +/- 2.14E+01 U
Zinc-65
-3.65E+01 +/- 3.35E+01 U
-2.04E+00 +/- 1.62E+01 U
1.12E+01 +/- 2.03E+01 U
-2.31E+01 +/- 4.04E+01 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 67 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 24: Tissue-Plant Gamma Isotopic Data - M-43c Imholte Farm (pCi/kg)
Nuclide June July August September Cesium-134 6.62E+00 +/- 1.62E+01 U
-2.87E+00 +/- 9.98E+00 U
9.16E+00 +/- 1.34E+01 U
-1.93E+01 +/- 1.67E+01 U
Cesium-137 1.84E-01 +/- 1.89E+01 U
2.13E+00 +/- 9.18E+00 U
-1.74E+01 +/- 1.52E+01 U
2.39E-01 +/- 1.70E+01 U
Cobalt-58
-6.98E+00 +/- 1.87E+01 U
-4.63E+00 +/- 9.53E+00 U
1.70E+00 +/- 1.07E+01 U
-6.21E+00 +/- 1.22E+01 U
-2.19E+00 +/- 1.84E+01 U
3.87E+00 +/- 1.00E+01 U
-3.15E+00 +/- 1.07E+01 U
-2.30E+00 +/- 1.52E+01 U
Iodine-131 4.17E-02 +/- 3.13E+01 U
-4.36E+00 +/- 1.10E+01 U
9.62E+00 +/- 2.59E+01 U
6.79E+00 +/- 2.85E+01 U
Iron-59 5.32E+00 +/- 5.64E+01 U
2.22E+00 +/- 1.83E+01 U
3.67E+00 +/- 1.95E+01 U
5.86E+00 +/- 3.20E+01 U
Manganese-54 3.03E+00 +/- 1.98E+01 U
3.15E-01 +/- 9.31E+00 U
-4.58E+00 +/- 9.83E+00 U
1.30E+00 +/- 1.47E+01 U
Niobium-95
-6.69E+00 +/- 1.69E+01 U
8.10E+00 +/- 9.68E+00 U
-1.66E+00 +/- 1.08E+01 U
8.98E+00 +/- 1.53E+01 U
Zinc-65
-1.73E+01 +/- 4.49E+01 U
-1.43E+00 +/- 2.16E+01 U
4.72E+00 +/- 2.12E+01 U
-3.16E+01 +/- 6.50E+01 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 68 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 25: Water Tritium Data (pCi/kg)
Location Q1 Q2 Q3 Q4 M-11 City of Monticello
-2.73E+01 +/- 2.42E+02 U
-2.01E+01 +/- 1.80E+02 U
-3.70E+01 +/- 2.08E+02 U
-1.61E+01 +/- 2.18E+02 U
M-12 Plant Well #11 1.68E+02 +/- 2.22E+02 U
8.20E+01 +/- 1.90E+02 U
6.92E+01 +/- 2.26E+02 U
8.04E+01 +/- 2.17E+02 U
M-14 City of Minneapolis
-1.78E+02 +/- 1.94E+02 U
2.49E+02 +/- 2.47E+02 U
-2.69E+02 +/- 2.18E+02 U
2.34E+02 +/- 2.67E+02 U
M-43c Imholte Farm
-1.55E+02 +/- 2.19E+02 U
9.39E+01 +/- 1.91E+02 U
1.24E+02 +/- 2.20E+02 U
-1.18E+02 +/- 1.89E+02 U
M-55 Hasbrouck Residence
-3.22E+02 +/- 2.21E+02 U
-5.22E+01 +/- 1.73E+02 U
5.88E+01 +/- 2.13E+02 U
-5.44E+01 +/- 2.11E+02 U
M-8c Upstream of Plant 2.16E+01 +/- 2.24E+02 U
1.20E+02 +/- 2.38E+02 U
1.04E+02 +/- 2.64E+02 U
4.80E+01 +/- 2.10E+02 U
M-9 Downstream of Plant 1.97E+01 +/- 2.26E+02 U
-6.98E+01 +/- 2.06E+02 U
6.10E+01 +/- 2.64E+02 U
7.33E+01 +/- 2.06E+02 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 69 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 26: Drinking Water Gross Beta Data (pCi/kg)
M-14 City of Minneapolis Gross Beta Jan 2.59E+00 +/- 2.39E+00 U
Feb 2.15E+00 +/- 2.04E+00 U
Mar 1.48E+00 +/- 1.45E+00 U
Apr
-5.22E-01 +/- 1.80E+00 U
May 1.56E+00 +/- 1.96E+00 U
Jun 2.18E+00 +/- 1.96E+00 U
Jul 9.62E-01 +/- 1.47E+00 U
Aug 1.86E+00 +/- 2.01E+00 U
Sep 1.29E+00 +/- 1.71E+00 U
Oct 1.34E+00 +/- 1.93E+00 U
Nov 1.03E+00 +/- 1.46E+00 U
Dec 2.58E+00 +/- 2.03E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 70 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 27: Groundwater Gamma Isotopic Data - M-11 City of Monticello (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140 6.86E+00 +/- 1.53E+01 U
2.35E+00 +/- 8.54E+00 U
4.13E+00 +/- 1.09E+01 U
5.11E+00 +/- 1.22E+01 U
Cerium-144 3.88E+01 +/- 3.47E+01 UI 3.02E-01 +/- 1.32E+01 U
2.10E+00 +/- 1.35E+01 U
1.80E+00 +/- 1.53E+01 U
Cesium-134
-5.79E-01 +/- 3.91E+00 U
3.61E-01 +/- 2.42E+00 U
-6.71E-01 +/- 2.32E+00 U
6.01E-01 +/- 2.61E+00 U
-8.35E-01 +/- 3.05E+00 U
1.21E+00 +/- 1.77E+00 U
-1.96E+00 +/- 2.81E+00 U
-2.79E-01 +/- 2.02E+00 U
Cobalt-58 1.32E+00 +/- 3.56E+00 U
9.60E-01 +/- 2.06E+00 U
1.82E+00 +/- 2.60E+00 U
1.48E+00 +/- 1.74E+00 U
-1.25E-01 +/- 2.18E+00 U
-7.94E-02 +/- 2.17E+00 U
4.14E-01 +/- 2.72E+00 U
1.17E+00 +/- 2.38E+00 U
Iron-59 5.50E+00 +/- 5.61E+00 U
-4.16E-01 +/- 3.66E+00 U
1.79E+00 +/- 5.09E+00 U
-4.85E+00 +/- 5.33E+00 U
Lanthanum-140
-1.73E+00 +/- 4.45E+00 U
8.10E-01 +/- 3.06E+00 U
-3.18E+00 +/- 5.78E+00 U
-1.52E+00 +/- 4.45E+00 U
-8.17E-01 +/- 3.01E+00 U
-8.25E-01 +/- 1.91E+00 U
-1.22E+00 +/- 2.24E+00 U
2.28E-01 +/- 2.11E+00 U
Niobium-95
-2.40E+00 +/- 3.52E+00 U
-2.61E-01 +/- 2.07E+00 U
-1.61E+00 +/- 3.33E+00 U
-5.92E-01 +/- 2.32E+00 U
Zinc-65 1.81E+00 +/- 7.99E+00 U
-2.21E+00 +/- 3.91E+00 U
-6.19E-01 +/- 4.16E+00 U
-1.83E+00 +/- 3.71E+00 U
Zirconium-95
-3.35E+00 +/- 5.63E+00 U
2.84E-01 +/- 3.95E+00 U
4.11E+00 +/- 4.52E+00 U
-1.05E+00 +/- 3.73E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 71 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 28: Groundwater Gamma Isotopic Data - M-12 Plant Well #11 (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140
-3.18E+00 +/- 1.08E+01 U
-2.63E+00 +/- 1.17E+01 U
-4.44E+00 +/- 8.85E+00 U
2.56E+00 +/- 1.02E+01 U
Cerium-144
-6.19E+00 +/- 1.54E+01 U
7.93E+00 +/- 1.71E+01 U
1.09E+01 +/- 1.67E+01 U
2.45E+00 +/- 1.28E+01 U
Cesium-134
-1.11E+00 +/- 2.53E+00 U
-1.01E+00 +/- 2.74E+00 U
5.14E-01 +/- 2.44E+00 U
-1.33E+00 +/- 2.07E+00 U
Cesium-137 2.02E+00 +/- 3.78E+00 U
4.34E-01 +/- 2.40E+00 U
-9.32E-01 +/- 2.49E+00 U
-1.23E+00 +/- 2.06E+00 U
Cobalt-58 8.69E-01 +/- 2.18E+00 U
-1.89E+00 +/- 2.71E+00 U
-1.40E+00 +/- 2.57E+00 U
-1.15E+00 +/- 1.99E+00 U
Cobalt-60 1.18E-01 +/- 1.73E+00 U
-3.35E+00 +/- 3.20E+00 U
-7.86E-01 +/- 1.47E+00 U
1.28E+00 +/- 1.92E+00 U
Iron-59
-5.49E-01 +/- 4.45E+00 U
-1.61E-01 +/- 4.69E+00 U
-2.34E+00 +/- 4.83E+00 U
-1.18E+00 +/- 4.27E+00 U
Lanthanum-140
-3.15E-01 +/- 2.79E+00 U
-1.40E+00 +/- 4.45E+00 U
-9.03E+00 +/- 5.59E+00 U
4.28E-01 +/- 4.58E+00 U
Manganese-54 5.95E-01 +/- 2.14E+00 U
-2.90E+00 +/- 2.55E+00 U
1.02E+00 +/- 2.38E+00 U
3.86E-01 +/- 1.61E+00 U
Niobium-95
-1.60E+00 +/- 2.53E+00 U
1.32E+00 +/- 2.20E+00 U
2.01E-01 +/- 1.83E+00 U
4.30E-01 +/- 1.94E+00 U
Zinc-65 1.45E+00 +/- 5.01E+00 U
8.72E-01 +/- 5.91E+00 U
2.49E+00 +/- 5.53E+00 U
-6.32E-01 +/- 3.20E+00 U
Zirconium-95
-4.11E+00 +/- 4.64E+00 U
-7.85E-01 +/- 4.54E+00 U
5.30E+00 +/- 6.22E+00 U
-4.34E-01 +/- 3.83E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 72 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 29: Groundwater Gamma Isotopic Data - M-43c Imholte Farm (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140
-4.16E+00 +/- 9.29E+00 U
1.74E+01 +/- 1.61E+01 U
3.25E+00 +/- 6.43E+00 U
1.37E+00 +/- 9.98E+00 U
Cerium-144 1.02E+01 +/- 1.54E+01 U
5.45E+00 +/- 1.83E+01 U
-4.72E-02 +/- 7.61E+00 U
7.26E+00 +/- 1.26E+01 U
Cesium-134
-3.66E-01 +/- 2.48E+00 U
-6.11E-02 +/- 2.60E+00 U
6.33E-01 +/- 1.20E+00 U
4.64E-01 +/- 1.98E+00 U
-1.22E+00 +/- 1.96E+00 U
1.06E+00 +/- 2.30E+00 U
2.32E-02 +/- 2.98E+00 U
1.06E+00 +/- 1.92E+00 U
Cobalt-58 8.10E-02 +/- 1.84E+00 U
2.08E-01 +/- 2.83E+00 U
1.81E+00 +/- 9.26E-01 UI
-1.32E+00 +/- 2.20E+00 U
Cobalt-60 2.81E+00 +/- 3.17E+00 U
2.63E+00 +/- 2.84E+00 U
-1.88E-01 +/- 1.13E+00 U
-1.40E+00 +/- 1.84E+00 U
Iron-59 3.66E+00 +/- 4.52E+00 U
1.52E+00 +/- 5.19E+00 U
-4.95E-01 +/- 2.27E+00 U
1.51E+00 +/- 3.72E+00 U
Lanthanum-140 1.42E-01 +/- 3.18E+00 U
-2.27E+00 +/- 3.73E+00 U
-3.50E-01 +/- 2.01E+00 U
-6.71E-01 +/- 4.07E+00 U
-4.66E-01 +/- 2.23E+00 U
9.40E-01 +/- 2.46E+00 U
-8.98E-01 +/- 1.08E+00 U
-3.93E-01 +/- 2.00E+00 U
Niobium-95
-1.76E+00 +/- 2.59E+00 U
2.17E+00 +/- 2.64E+00 U
1.36E-01 +/- 3.30E+00 U
-1.91E-01 +/- 2.21E+00 U
Zinc-65 4.01E+00 +/- 5.48E+00 U
-2.92E+00 +/- 4.40E+00 U
-8.03E-01 +/- 2.58E+00 U
-1.36E+00 +/- 4.50E+00 U
Zirconium-95 2.97E-02 +/- 2.54E+00 U
1.69E+00 +/- 4.05E+00 U
-1.37E+00 +/- 1.89E+00 U
1.63E-02 +/- 3.61E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 73 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 30: Groundwater Gamma Isotopic Data - M-55 Hasbrouck Residence (pCi/m3)
Nuclide Q1 Q2 Q3 Q4 Barium-140
-6.92E-01 +/- 1.20E+01 U
1.97E+01 +/- 1.72E+01 U
1.39E+00 +/- 1.32E+01 U
-6.39E+00 +/- 1.66E+01 U
Cerium-144
-9.72E+00 +/- 1.59E+01 U
-1.13E+01 +/- 1.49E+01 U
-7.29E+00 +/- 1.61E+01 U
-2.97E+00 +/- 1.41E+01 U
Cesium-134
-8.67E-01 +/- 2.18E+00 U
-1.27E+00 +/- 3.51E+00 U
-1.71E+00 +/- 2.40E+00 U
1.31E+00 +/- 2.81E+00 U
-5.80E-01 +/- 2.99E+00 U
8.98E-01 +/- 2.68E+00 U
-1.51E+00 +/- 2.99E+00 U
4.60E+00 +/- 3.79E+00 UI Cobalt-58
-3.18E+00 +/- 2.59E+00 U
3.23E-01 +/- 2.54E+00 U
1.18E+00 +/- 2.05E+00 U
1.12E+00 +/- 2.65E+00 U
-5.88E-01 +/- 2.81E+00 U
-2.41E+00 +/- 2.91E+00 U
1.22E+00 +/- 2.59E+00 U
1.05E+00 +/- 2.37E+00 U
Iron-59 9.98E-02 +/- 5.32E+00 U
-3.68E+00 +/- 7.92E+00 U
-2.74E+00 +/- 4.20E+00 U
1.28E+00 +/- 4.24E+00 U
Lanthanum-140 9.28E-01 +/- 4.38E+00 U
-2.81E+00 +/- 4.48E+00 U
-1.03E-01 +/- 3.04E+00 U
-2.79E+00 +/- 4.45E+00 U
-7.02E-01 +/- 2.97E+00 U
2.40E+00 +/- 3.36E+00 U
3.64E-01 +/- 2.37E+00 U
2.78E-01 +/- 2.52E+00 U
Niobium-95
-2.18E+00 +/- 2.69E+00 U
1.19E+00 +/- 3.21E+00 U
1.95E+00 +/- 2.18E+00 U
1.87E-01 +/- 3.34E+00 U
Zinc-65
-9.83E-01 +/- 6.39E+00 U
6.44E-01 +/- 7.75E+00 U
-1.64E-01 +/- 4.08E+00 U
1.20E+00 +/- 5.04E+00 U
Zirconium-95
-2.21E-01 +/- 5.52E+00 U
-5.17E-01 +/- 5.16E+00 U
2.92E+00 +/- 4.37E+00 U
2.10E+00 +/- 5.30E+00 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 74 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 31: Drinking Water Gamma Isotopic Data - M-14 City of Minneapolis Nuclide Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Barium-140
-9.750 +/-
24.700 U
-12.700 +/-
17.600 U
0.015 +/-
11.100 U
0.881 +/-
12.800 U
30.100 +/-
16.100 U
-4.160 +/-
17.600 U
13.700 +/-
18.800 U
-7.130 +/-
14.800 U
-9.700 +/-
17.200 U
0.019 +/-
11.000 U
5.980 +/-
11.300 U
9.430 +/-
11.500 U
Cerium-144 13.100 +/-
16.900 U
5.150 +/-
18.300 U
-5.150 +/-
12.100 U
10.600 +/-
15.800 U
-6.490 +/-
15.400 U
3.680 +/-
18.000 U
3.820 +/-
16.400 U
-9.580 +/-
13.300 U
30.400 +/-
30.800 UI 11.100 +/-
12.500 U
-3.490 +/-
13.200 U
-3.240 +/-
17.400 U
Cesium-134 1.230 +/-
4.080 U
0.885 +/-
2.870 U
1.640 +/-
1.870 U
2.010 +/-
2.360 U
3.190 +/-
3.000 U
-1.110 +/-
2.650 U
1.820 +/-
3.130 U
0.211 +/-
2.340 U
0.177 +/-
2.950 U
0.302 +/-
1.950 U
1.020 +/-
1.900 U
0.571 +/-
2.680 U
Cesium-137 0.911 +/-
2.810 U
-0.840 +/-
3.800 U
4.390 +/-
2.810 U
-0.280 +/-
2.640 U
0.687 +/-
3.520 U
0.598 +/-
2.370 U
0.193 +/-
2.780 U
-0.829 +/-
2.350 U
0.636 +/-
2.640 U
0.825 +/-
1.730 U
0.827 +/-
2.060 U
0.649 +/-
2.670 U
Cobalt-58 5.070 +/-
4.030 U
-1.910 +/-
3.060 U
0.228 +/-
2.000 U
-1.210 +/-
1.980 U
3.610 +/-
2.910 U
-0.126 +/-
2.460 U
-2.020 +/-
2.650 U
-2.300 +/-
2.130 U
0.590 +/-
1.880 U
0.938 +/-
2.070 U
-1.440 +/-
2.100 U
-1.130 +/-
2.440 U
Cobalt-60 1.460 +/-
2.830 U
-0.457 +/-
3.040 U
-0.903 +/-
2.250 U
-1.250 +/-
1.980 U
-1.690 +/-
2.400 U
1.780 +/-
2.630 U
0.303 +/-
2.580 U
-0.137 +/-
1.900 U
-1.090 +/-
2.370 U
-0.458 +/-
1.980 U
1.480 +/-
2.210 U
-1.290 +/-
2.770 U
Iron-59 3.850 +/-
8.900 U
-2.190 +/-
6.590 U
1.060 +/-
3.640 U
-1.390 +/-
4.180 U
-0.820 +/-
6.200 U
-5.110 +/-
6.770 U
2.780 +/-
6.010 U
1.610 +/-
4.580 U
0.542 +/-
5.050 U
0.427 +/-
3.850 U
0.496 +/-
3.620 U
0.794 +/-
4.580 U
Lanthanum-140
-5.900 +/-
8.330 U
-1.690 +/-
4.580 U
-1.320 +/-
3.460 U
-1.680 +/-
3.630 U
1.690 +/-
5.950 U
3.640 +/-
6.220 U
2.010 +/-
5.350 U
-0.751 +/-
4.020 U
-1.080 +/-
5.320 U
-1.520 +/-
3.240 U
-4.660 +/-
3.630 U
0.267 +/-
2.860 U
-0.922 +/-
3.040 U
1.470 +/-
2.630 U
-0.420 +/-
2.290 U
-1.130 +/-
2.550 U
-0.296 +/-
2.080 U
-0.167 +/-
2.370 U
-1.040 +/-
2.630 U
0.355 +/-
1.820 U
-1.730 +/-
2.110 U
0.553 +/-
1.830 U
0.608 +/-
2.070 U
-2.210 +/-
2.350 U
Niobium-95 1.640 +/-
3.830 U
-0.534 +/-
2.730 U
1.040 +/-
1.740 U
-1.210 +/-
2.370 U
-1.480 +/-
2.830 U
1.530 +/-
2.580 U
-3.270 +/-
3.690 U
-1.720 +/-
2.490 U
0.003 +/-
2.700 U
0.272 +/-
1.910 U
0.854 +/-
2.160 U
1.110 +/-
2.810 U
Zinc-65
-9.140 +/-
9.050 U
2.970 +/-
6.860 U
0.447 +/-
3.420 U
0.542 +/-
4.470 U
-1.540 +/-
5.040 U
-1.630 +/-
4.340 U
-4.080 +/-
7.520 U
2.820 +/-
4.220 U
-1.240 +/-
5.480 U
-0.051 +/-
3.710 U
4.090 +/-
4.080 U
1.900 +/-
5.030 U
Zirconium-95
-5.310 +/-
6.270 U
-3.120 +/-
5.080 U
1.050 +/-
3.700 U
1.990 +/-
4.470 U
-0.070 +/-
4.980 U
3.300 +/-
5.250 U
1.510 +/-
5.640 U
2.660 +/-
3.740 U
-0.263 +/-
4.540 U
-2.850 +/-
3.730 U
-1.540 +/-
3.230 U
3.070 +/-
4.310 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 75 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 28 Unsafe condition for sampling due to frozen river surface.
Table 32: Surface Water Gamma Isotopic Data - M-8c Upstream of Plant Nuclide Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec28 Barium-140
-3.900 +/-
13.000 U
-3.790 +/-
18.000 U
3.040 +/-
9.900 U
-2.660 +/-
15.900 U
6.160 +/-
31.500 U
1.780 +/-
14.900 U
10.500 +/-
17.200 U
28.400 +/-
32.900 U
15.600 +/-
19.000 U
4.210 +/-
10.900 U
15.800 +/-
19.800 U
Cerium-144
-2.230 +/-
9.820 U
-0.074 +/-
15.700 U
0.009 +/-
6.660 U
1.740 +/-
17.700 U
-1.100 +/-
6.540 U
-2.860 +/-
12.200 U
7.870 +/-
9.890 U
-6.760 +/-
8.120 U
3.470 +/-
13.100 U
3.530 +/-
6.650 U
-2.540 +/-
11.500 U
Cesium-134
-1.130 +/-
2.000 U
-3.830 +/-
2.840 U
0.026 +/-
0.934 U
0.190 +/-
2.180 U
0.219 +/-
0.928 U
0.310 +/-
1.750 U
0.669 +/-
1.700 U
1.300 +/-
1.130 U
0.732 +/-
2.690 U
0.360 +/-
0.950 U
2.480 +/-
2.500 U
Cesium-137 0.843 +/-
1.650 U
-0.221 +/-
2.710 U
0.478 +/-
0.993 U
0.634 +/-
2.600 U
0.481 +/-
0.915 U
0.249 +/-
1.790 U
0.812 +/-
1.460 U
-0.192 +/-
1.120 U
-0.727 +/-
2.140 U
0.414 +/-
1.060 U
-0.161 +/-
2.040 U
Cobalt-58 0.502 +/-
2.470 U
-0.759 +/-
2.590 U
0.049 +/-
1.170 U
-1.350 +/-
3.280 U
0.486 +/-
1.130 U
-1.640 +/-
1.890 U
0.168 +/-
1.750 U
-0.054 +/-
1.390 U
-1.540 +/-
2.390 U
-0.155 +/-
0.998 U
0.168 +/-
2.030 U
Cobalt-60 0.437 +/-
1.630 U
0.083 +/-
3.200 U
-0.362 +/-
0.917 U
1.790 +/-
2.860 U
0.135 +/-
0.923 U
-0.823 +/-
2.220 U
0.305 +/-
1.650 U
-0.008 +/-
1.110 U
0.211 +/-
1.900 U
-0.381 +/-
1.200 U
0.418 +/-
1.400 U
Iron-59
-2.860 +/-
4.620 U
-7.020 +/-
6.560 U
-1.420 +/-
2.450 U
-2.380 +/-
5.720 U
0.386 +/-
3.000 U
2.640 +/-
4.210 U
-0.019 +/-
4.510 U
-1.110 +/-
3.670 U
-3.250 +/-
5.310 U
-1.510 +/-
2.500 U
2.720 +/-
7.420 U
Lanthanum-140
-2.090 +/-
4.360 U
-0.692 +/-
7.400 U
-2.170 +/-
3.810 U
-5.600 +/-
5.650 U
18.100 +/-
16.000
-0.097 +/-
5.070 U
1.880 +/-
7.530 U
-14.900 +/-
14.400 U
0.000 +/-
7.330 U
-0.221 +/-
3.840 U
2.650 +/-
7.090 U
Manganese-54 0.620 +/-
1.690 U
0.476 +/-
2.200 U
-0.326 +/-
0.923 U
-2.070 +/-
2.820 U
0.137 +/-
0.895 U
0.542 +/-
1.710 U
-1.220 +/-
1.680 U
-0.106 +/-
1.110 U
0.517 +/-
1.860 U
0.450 +/-
0.906 U
-1.400 +/-
1.710 U
Niobium-95
-2.180 +/-
2.410 U
0.116 +/-
2.770 U
0.361 +/-
1.040 U
-0.987 +/-
2.470 U
-0.467 +/-
1.220 U
-0.399 +/-
2.530 U
-0.236 +/-
1.960 U
1.560 +/-
1.580 U
-1.150 +/-
2.220 U
0.894 +/-
0.922 U
-1.220 +/-
2.130 U
Zinc-65 2.670 +/-
3.690 U
-2.040 +/-
6.090 U
-0.374 +/-
1.940 U
1.170 +/-
4.300 U
-0.709 +/-
1.990 U
-3.670 +/-
3.650 U
0.099 +/-
3.100 U
0.125 +/-
2.440 U
-0.670 +/-
4.500 U
0.439 +/-
2.150 U
0.523 +/-
3.370 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 76 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 32: Surface Water Gamma Isotopic Data - M-8c Upstream of Plant Nuclide Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec28 Zirconium-95 2.080 +/-
3.650 U
0.870 +/-
4.440 U
-1.180 +/-
2.080 U
2.800 +/-
4.510 U
0.001 +/-
2.180 U
-1.600 +/-
3.520 U
0.424 +/-
3.660 U
-0.050 +/-
2.700 U
-3.160 +/-
4.350 U
0.666 +/-
1.910 U
-0.138 +/-
3.530 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 77 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 33: Surface Water Gamma Isotopic Data - M-9 Downstream of Plant Nuclide Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Barium-140
-3.550 +/-
16.400 U
6.780 +/-
10.300 U
2.670 +/-
9.270 U
-9.200 +/-
15.500 U
11.000 +/-
30.400 U
-4.130 +/-
16.600 U
-4.940 +/-
21.600 U
50.500 +/-
43.200 U
-2.830 +/-
20.900 U
-2.800 +/-
8.940 U
-6.270 +/-
26.300 U
1.390 +/-
13.600 U
Cerium-144 4.480 +/-
14.700 U
4.050 +/-
11.800 U
-2.660 +/-
5.720 U
6.850 +/-
14.900 U
3.400 +/-
6.010 U
-9.230 +/-
14.200 U
5.960 +/-
14.500 U
3.900 +/-
6.640 U
-8.350 +/-
20.700 U
-3.310 +/-
5.450 U
-10.400 +/-
14.200 U
0.416 +/-
12.400 U
Cesium-134 1.440 +/-
2.450 U
-0.167 +/-
1.750 U
-0.324 +/-
0.933 U
-1.190 +/-
2.600 U
-0.044 +/-
0.852 U
0.419 +/-
2.540 U
-1.710 +/-
2.170 U
1.030 +/-
1.460 U
1.470 +/-
1.590 U
0.205 +/-
0.865 U
0.511 +/-
2.390 U
-0.028 +/-
1.950 U
Cesium-137 1.520 +/-
2.730 U
-0.617 +/-
2.030 U
0.216 +/-
0.944 U
0.429 +/-
2.270 U
-1.020 +/-
1.430 U
-0.077 +/-
2.770 U
0.675 +/-
1.930 U
0.575 +/-
0.890 U
-1.010 +/-
2.570 U
-0.116 +/-
0.827 U
0.329 +/-
2.010 U
0.635 +/-
1.800 U
Cobalt-58
-0.614 +/-
2.590 U
0.129 +/-
1.780 U
-0.040 +/-
0.951 U
1.620 +/-
2.720 U
0.480 +/-
1.160 U
-0.961 +/-
2.790 U
2.470 +/-
2.320 U
0.695 +/-
1.280 U
-1.880 +/-
2.900 U
0.435 +/-
0.984 U
-0.895 +/-
2.160 U
0.941 +/-
1.990 U
-0.712 +/-
1.880 U
0.178 +/-
1.800 U
-1.870 +/-
1.410 U
0.363 +/-
3.110 U
-0.252 +/-
0.888 U
-0.908 +/-
2.190 U
-0.509 +/-
2.240 U
0.036 +/-
0.891 U
0.362 +/-
2.070 U
0.235 +/-
0.854 U
-0.946 +/-
3.140 U
0.488 +/-
1.730 U
Iron-59 2.680 +/-
5.660 U
-7.260 +/-
4.750 U
0.493 +/-
2.400 U
-1.350 +/-
5.630 U
0.902 +/-
2.590 U
5.030 +/-
4.910 U
-1.820 +/-
5.010 U
-2.290 +/-
3.270 U
1.730 +/-
5.140 U
-0.323 +/-
2.020 U
4.610 +/-
4.760 U
0.576 +/-
3.240 U
Lanthanum-140
-5.380 +/-
6.430 U
1.350 +/-
3.190 U
-2.070 +/-
4.100 U
-3.840 +/-
5.980 U
-15.500 +/-
10.100 U
-2.380 +/-
4.820 U
2.430 +/-
7.490 U
0.304 +/-
9.680 U
1.890 +/-
7.180 U
-0.908 +/-
2.640 U
-3.310 +/-
8.690 U
3.380 +/-
4.030 U
Manganese-54 0.891 +/-
2.420 U
-0.209 +/-
1.840 U
0.497 +/-
0.953 U
-0.620 +/-
2.200 U
0.561 +/-
0.854 U
-0.268 +/-
1.950 U
-0.215 +/-
2.190 U
-0.123 +/-
1.520 U
-0.397 +/-
1.930 U
-0.758 +/-
1.350 U
3.370 +/-
2.080 U
0.302 +/-
2.050 U
Niobium-95
-0.704 +/-
2.470 U
0.274 +/-
1.930 U
0.165 +/-
1.050 U
-0.488 +/-
1.840 U
0.382 +/-
2.370 U
1.990 +/-
2.460 U
0.759 +/-
3.600 U
0.630 +/-
1.890 U
1.800 +/-
2.560 U
1.080 +/-
1.150 U
0.331 +/-
2.670 U
0.344 +/-
1.910 U
Zinc-65
-3.490 +/-
4.820 U
1.180 +/-
3.290 U
-0.652 +/-
1.690 U
2.530 +/-
4.360 U
1.260 +/-
2.040 U
-1.320 +/-
4.500 U
-0.886 +/-
4.350 U
0.457 +/-
1.940 U
-0.378 +/-
6.230 U
-1.620 +/-
1.890 U
-0.887 +/-
5.350 U
3.530 +/-
3.570 U
Zirconium-95
-1.090 +/-
4.520 U
1.470 +/-
3.200 U
1.980 +/-
1.930 U
-0.704 +/-
3.950 U
-3.040 +/-
2.080 U
1.080 +/-
3.640 U
0.148 +/-
4.070 U
5.090 +/-
3.450 UI
-0.756 +/-
4.400 U
0.874 +/-
1.620 U
-1.130 +/-
4.570 U
1.190 +/-
3.720 U
Annual Radiological Environmental Operating Report YEAR: 2024 Page 78 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 29 TLD was missing, but holder was intact. Likely missing due to weather or other environmental factors.
Table 34: Direct Radiation Data - TLD: Gamma (mrem/91 day)
Location Q1 Q2 Q3 Q4 Control M01C Kirchenbauer Farm 13.2 +/- 0.6 12.2 +/- 0.7 14.0 +/- 0.8 13.3 +/- 0.8 M02C Cty Rd 4 & 15 12.2 +/- 0.5 12.1 +/- 0.9 13.1 +/- 0.8 12.8 +/- 0.7 M03C Cty Rd 19 & Jason Ave 13.1 +/- 0.5 12.9 +/- 1.0 14.8 +/- 0.6 14.0 +/- 0.6 M04C Maple Lake Water Tower 12.1 +/- 0.7 12.4 +/- 0.9 14.0 +/- 0.6 12.8 +/- 0.7 Inner M01A Sherburne Ave. So.1 16.1 +/- 0.9 14.7 +/- 1.1 17.4 +/- 0.8 16.7 +/- 0.8 M02A Sherburne Ave. So.
14.4 +/- 0.9 13.8 +/- 0.8 15.9 +/- 0.7 15.6 +/- 0.8 M03A Sherburne Ave. So.
15.0 +/- 0.5 15.0 +/- 0.5 15.8 +/- 0.7 16.3 +/- 0.9 M04A Biology Station Rd.
12.9 +/- 0.6 12.8 +/- 0.7 15.0 +/- 0.7 14.1 +/- 0.8 M05A Biology Station Rd.
13.3 +/- 0.6 11.8 +/- 0.9 15.3 +/- 0.7 14.0 +/- 0.6 M06A Biology Station Rd.
14.5 +/- 0.8 13.1 +/- 0.9 16.3 +/- 0.7 15.8 +/- 0.8 M07A Parking Lot H 14.3 +/- 0.7 12.8 +/- 0.9 15.5 +/- 0.5 15.4 +/- 0.6 M08A Parking Lot F 14.3 +/- 0.6 12.5 +/- 0.7 15.8 +/- 0.6 14.5 +/- 0.5 M09A County Road 75 14.3 +/- 0.6 12.7 +/- 0.9 16.5 +/- 0.8 14.2 +/- 0.8 M10A County Road 75 14.2 +/- 1.0 12.9 +/- 1.1 16.0 +/- 0.6 14.4 +/- 0.9 M11A County Road 75 2 15.0 +/- 0.8 14.5 +/- 1.1 17.2 +/- 0.7 15.9 +/- 0.9 M12A County Road 75 14.3 +/- 0.8 12.9 +/- 0.8 16.0 +/- 0.9 15.4 +/- 0.7 M13A North Boundary Rd.
12.0 +/- 0.6 10.8 +/- 0.7 Missed Sample29 14.5 +/- 0.7 M14A North Boundary Rd.
15.1 +/- 0.9 14.0 +/- 1.1 16.9 +/- 0.6 16.2 +/- 0.6 Outer M01B 117th Street 12.7 +/- 0.6 12.3 +/- 1.3 15.0 +/- 0.8 14.6 +/- 0.7
Annual Radiological Environmental Operating Report YEAR: 2024 Page 79 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant 30 Sampler was likely struck by snow removal equipment. TLD and holder missing.
Table 34: Direct Radiation Data - TLD: Gamma (mrem/91 day)
Location Q1 Q2 Q3 Q4 M02B County Road 11 13.9 +/- 0.5 12.9 +/- 1.0 14.9 +/- 0.8 14.6 +/- 0.9 M03B County Rd. 73 & 81 11.9 +/- 0.6 10.4 +/- 0.7 12.6 +/- 0.7 13.3 +/- 0.6 M04B County Rd. 73 (196th Street) 13.1 +/- 0.8 12.3 +/- 0.9 14.0 +/- 0.7 13.5 +/- 0.5 M05B City of Big Lake 13.8 +/- 0.6 13.5 +/- 1.2 14.9 +/- 0.8 14.4 +/- 0.9 M06B County Rd 14 & 196th Street 14.3 +/- 0.8 13.2 +/- 1.0 15.1 +/- 0.6 Missed Sample30 M07B Monticello Industrial Dr.
14.3 +/- 0.7 12.9 +/- 0.8 15.0 +/- 0.8 14.2 +/- 0.7 M08B Residence Hwy 25 & Davidson Ave 13.2 +/- 0.6 12.4 +/- 0.8 14.7 +/- 0.7 13.2 +/- 0.7 M09B Weinand Farm 14.6 +/- 1.1 13.8 +/- 0.9 16.6 +/- 0.5 15.3 +/- 0.9 M10B Reisewitz Farm - Acacia Ave 14.0 +/- 0.7 13.5 +/- 1.0 15.5 +/- 0.5 14.5 +/- 0.6 M11B Vanlith Farm - 97th Ave 14.5 +/- 0.6 14.0 +/- 1.1 16.4 +/- 0.6 14.9 +/- 0.7 M12B Lake Maria St. Park 13.5 +/- 0.8 13.2 +/- 0.8 15.4 +/- 0.7 14.6 +/- 0.6 M01B 117th Street 14.2 +/- 0.6 14.4 +/- 1.4 15.4 +/- 0.7 15.2 +/- 0.9 M13B Bridgewater Sta.
14.9 +/- 0.8 13.7 +/- 0.7 16.1 +/- 0.5 15.3 +/- 0.6 M14B Anderson Res. - Cty Rd 111 13.3 +/- 0.6 13.2 +/- 1.2 16.3 +/- 1.4 13.9 +/- 0.6 M15B Barton Ave NW 12.9 +/- 0.6 12.7 +/- 1.2 14.2 +/- 0.7 14.6 +/- 0.7 M16B University Ave and Hancock St, Becker 12.7 +/- 0.6 12.3 +/- 1.3 15.0 +/- 0.8 14.6 +/- 0.7 Special Interest M01S 127th St. NE 12.2 +/- 0.6 10.6 +/- 0.9 13.2 +/- 0.7 13.3 +/- 0.8 M02S Krone Residence 12.4 +/- 0.6 11.7 +/- 0.9 13.7 +/- 0.7 12.9 +/- 0.6 M03S Big Oaks Park 13.9 +/- 0.6 13.3 +/- 0.9 15.7 +/- 0.5 14.8 +/- 0.6 M04S Pinewood School 13.8 +/- 0.6 13.7 +/- 1.1 15.6 +/- 0.6 14.4 +/- 0.5 M05S 20500 Co. Rd 11, Big Lake 13.6 +/- 0.6 13.7 +/- 1.1 18.7 +/- 0.9 14.9 +/- 0.8 M06S Monticello Public Works 14.8 +/- 0.6 14.2 +/- 0.7 16.6 +/- 0.7 13.9 +/- 0.5
Annual Radiological Environmental Operating Report YEAR: 2024 Page 80 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 34: Direct Radiation Data - TLD: Gamma (mrem/91 day)
Location Q1 Q2 Q3 Q4 I-11 OCA Fence South, on exit road 14.2 +/- 0.7 13.4 +/- 0.8 15.6 +/- 0.7 14.0 +/- 0.6 I-12 OCA Fence Middle, on exit road 14.9 +/- 0.6 14.0 +/- 0.7 15.8 +/- 0.7 14.6 +/- 0.6 I-13 OCA Fence North, on exit road 14.9 +/- 0.7 14.1 +/- 1.2 16.1 +/- 0.6 14.8 +/- 0.6
Annual Radiological Environmental Operating Report YEAR: 2024 Page 81 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Table 35: Direct Radiation Data - ISFSI: Gamma (mrem/91 day)
Location Q1 Q2 Q3 Q4 I-01 NE corner of ISFSI 41.3 +/- 3.1 44.0 +/- 2.9 43.1 +/- 2.0 40.4 +/- 2.6 I-02 North side of ISFSI, center 35.4 +/- 2.0 38.8 +/- 3.0 40.8 +/- 2.7 35.9 +/- 2.5 I-03 NW corner of ISFSI 29.4 +/- 2.6 31.5 +/- 1.9 30.9 +/- 1.7 29.9 +/- 2.1 I-04 West side of ISFSI, middle 64.4 +/- 4.0 67.5 +/- 4.7 74.9 +/- 8.8 76.9 +/- 6.3 I-05 West side of ISFSI, at center of array 50.2 +/- 3.4 50.7 +/- 2.8 51.8 +/- 4.2 51.7 +/- 3.1 I-06 SW corner of ISFSI 27.3 +/- 2.4 28.0 +/- 2.8 30.9 +/- 2.7 28.6 +/- 2.5 I-07 South side of ISFSI, center 31.5 +/- 1.9 32.5 +/- 4.1 32.5 +/- 1.7 31.4 +/- 2.3 I-08 SE corner of ISFSI 32.0 +/- 2.9 30.2 +/- 2.6 32.7 +/- 2.7 30.4 +/- 2.1 I-09 East side of ISFSI, at center of array 71.5 +/- 4.2 68.3 +/- 6.3 69.1 +/- 2.9 66.2 +/- 3.2 I-10 East side of ISFSI, middle 56.2 +/- 3.1 57.3 +/- 3.6 58.8 +/- 2.4 54.9 +/- 3.5
Annual Radiological Environmental Operating Report YEAR: 2024 Page 82 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
, Cross Check Intercomparison Program Participation in cross check intercomparison studies is mandatory for laboratories performing analyses of REMP samples satisfying the requirements in the Offsite Site Dose Calculation Manual. Intercomparison studies provide a consistent and effective means to evaluate the accuracy and precision of analyses performed by a laboratory.
Study results should fall within specified control limits and results that fall outside the control limits are investigated and corrected.
The analytical laboratory analyzing samples for MNGP, GEL Laboratories, LLC (GEL), participated in the following proficiency testing studies provided by Environmental Resource Associates (ERA), Eckert & Ziegler Analytics, Inc., and the Department of Energy Mixed Analyte Performance Evaluation Program (MAPEP) in 2024. The Laboratorys intercomparison program results for 2024 are summarized below.
Eckert & Ziegler Analytics Environmental Cross-Check Program (including samples for 69 individual environmental analyses)
MAPEP Monitoring Program (including Series 49, Series 50, and Series 51 samples)
ERA Multimedia Radiochemistry Proficiency Test (MRAD PT) Program (including MRAD-40 and MRAD-41 samples)
ERA PT Program (including RAD-136, RAD-137, RAD-138 and RAD-139 samples)
During 2024, forty-one (41) radioisotopes associated with six (6) matrix types (air filter, cartridge, water, milk, soil, and vegetation) were analyzed under GELs Performance Evaluation program in participation with ERA, MAPEP, and Eckert &
Ziegler Analytics, as noted above. Matrix types were representative of client analyses performed during 2024. Of the four hundred sixty-three (463) total results, 96.1% (445 of 463) were found to be acceptable within the PT providers three sigma or other statistical criteria. The results of these analyses are provided in GELs 2024 Annual Quality Assurance Report for the Radiological Environmental Monitoring Program (REMP), included in Attachment 5. The Annual Quality Assurance Status Report provided by the TLD analysis laboratory, Environmental Dosimetry Company, is also provided in Attachment 5.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 83 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
, Environmental Direct Radiation Dosimetry Results Monitoring Location Quarterly Baseline, BQ (mrem)
Normalized Quarterly Monitoring Data, MQ Quarterly Facility Dose, FQ=MQ-BQ Annual
- Baseline, BA (mrem)
Annual Monitoring Data, MA (mrem)
Annual Facility Dose, FA=MA-BA (mrem, or ND if FA MDDA)
(mrem)
(mrem, or ND if FQ MDDQ)
Q1 Q2-Q4 1
2 3
4 1
2 3
4 M01A 13.2 15.1 16.1 14.7 17.4 16.7 ND ND ND ND 58.5 64.9 ND M02A 14.2 16.1 14.4 13.8 15.9 15.6 ND ND ND ND 62.6 59.6 ND M03A 13.9 15.7 15.0 15.8 16.3 ND ND ND 61.0 62.8 ND M04A 13.1 15.6 12.9 12.8 15.0 14.1 ND ND ND ND 59.8 54.8 ND M05A 13.2 15.9 13.3 11.8 15.3 14.0 ND ND ND ND 60.8 54.4 ND M06A 14.1 16.1 14.5 13.1 16.3 15.8 ND ND ND ND 62.4 59.8 ND M07A 13.9 15.9 14.3 12.8 15.5 15.4 ND ND ND ND 61.4 58.0 ND M08A 13.9 15.8 14.3 12.5 15.8 14.5 ND ND ND ND 61.5 57.1 ND M09A 14.3 15.8 14.3 12.7 16.5 14.2 ND ND ND ND 61.5 57.6 ND M10A 14.3 16.4 14.2 12.9 16.0 14.4 ND ND ND ND 63.4 57.4 ND M11A 15.4 16.9 15.0 14.5 17.2 15.9 ND ND ND ND 66.0 62.7 ND M12A 15.5 17.1 14.3 12.9 16.0 15.4 ND ND ND ND 66.5 58.6 ND M13A 13.6 14.6 12.0 10.8 14.5 ND ND ND 57.3 49.8 ND M14A 14.3 16.3 15.1 14.0 16.9 16.2 ND ND ND ND 63.4 62.2 ND M01B 14.3 15.4 12.7 12.3 15.0 14.6 ND ND ND ND 60.7 54.6 ND M02B 14.6 15.4 13.9 12.9 14.9 14.6 ND ND ND ND 60.8 56.3 ND M03B 12.2 12.9 11.9 10.4 12.6 13.3 ND ND ND ND 50.9 48.2 ND M04B 12.9 14.4 13.1 12.3 14.0 13.5 ND ND ND ND 56.1 52.8 ND M05B 14.6 16.0 13.8 13.5 14.9 14.4 ND ND ND ND 62.5 56.6 ND M06B 12.8 15.4 14.3 13.2 15.1 ND ND ND 58.8 56.8 ND M07B 15.3 16.1 14.3 12.9 15.0 14.2 ND ND ND ND 63.5 56.4 ND M08B 13.6 14.8 13.2 12.4 14.7 13.2 ND ND ND ND 58.0 53.5 ND M09B 14.2 16.7 14.6 13.8 16.6 15.3 ND ND ND ND 64.3 60.3 ND M10B 14.5 16.0 14.0 13.5 15.5 14.5 ND ND ND ND 62.5 57.5 ND
Annual Radiological Environmental Operating Report YEAR: 2024 Page 84 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant Monitoring Location Quarterly Baseline, BQ (mrem)
Normalized Quarterly Monitoring Data, MQ Quarterly Facility Dose, FQ=MQ-BQ Annual
- Baseline, BA (mrem)
Annual Monitoring Data, MA (mrem)
Annual Facility Dose, FA=MA-BA (mrem, or ND if FA MDDA)
(mrem)
(mrem, or ND if FQ MDDQ)
Q1 Q2-Q4 1
2 3
4 1
2 3
4 M11B 13.9 16.0 14.5 14.0 16.4 14.9 ND ND ND ND 61.8 59.8 ND M12B 13.5 15.6 13.5 13.2 15.4 14.6 ND ND ND ND 60.3 56.7 ND M13B 13.5 14.4 14.2 14.4 15.4 15.2 ND ND ND ND 56.6 59.2 ND M14B 13.4 15.5 14.9 13.7 16.1 15.3 ND ND ND ND 59.9 59.9 ND M15B 13.5 15.0 13.3 13.2 16.3 13.9 ND ND ND ND 58.4 56.6 ND M16B 13.0 13.5 12.9 12.7 14.2 14.6 ND ND ND ND 53.4 54.3 ND M01S 12.1 13.3 12.2 10.6 13.2 13.3 ND ND ND ND 51.7 49.3 ND M02S 11.5 12.7 12.4 11.7 13.7 12.9 ND ND ND ND 49.7 50.7 ND M03S 13.6 15.3 13.9 13.3 15.7 14.8 ND ND ND ND 59.4 57.7 ND M04S 14.3 15.8 13.8 13.7 15.6 14.4 ND ND ND ND 61.7 57.5 ND M05S 14.1 15.3 13.6 13.7 18.7 14.9 ND ND ND ND 60.1 60.9 ND M06S 15.9 16.9 14.8 14.2 16.6 13.9 ND ND ND ND 66.6 59.4 ND M01C 14.0 14.8 13.2 12.2 14.0 13.3 ND ND ND ND 58.4 52.7 ND M02C 14.0 15.6 12.2 12.1 13.1 12.8 ND ND ND ND 60.9 50.3 ND M03C 15.3 16.3 13.1 12.9 14.8 14.0 ND ND ND ND 64.3 54.8 ND M04C 14.1 14.8 12.1 12.4 14.0 12.8 ND ND ND ND 58.7 51.3 ND MDDQ = Quarterly Minimum Differential Dose = 4.7 mrem MDDA = Annual Minimum Differential Dose = 11.2 mrem ND = Not Detected, where MQ (BQ+MDDQ) or MA (BA+MDDA)
- = TLD was missing in the field.
Annual Radiological Environmental Operating Report YEAR: 2024 Page 85 of 85 Company: Xcel Energy Plant: Monticello Nuclear Generating Plant
, Laboratory Quality Assurance Reports (Enclosed)
2024 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)
pg. 2 2024 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)
Approved By March 17, 2025 Angela A. Johnson Date Director, Quality Systems
pg. 3 TABLE OF CONTENTS
- 1. INTRODUCTION 5
- 2. QUALITY ASSURANCE PROGRAMS FOR INTER-LABORATORY, INTRA-LABORATORY AND THIRD PARTY CROSS-CHECK 5
- 3. QUALITY ASSURANCE PROGRAM FOR INTERNAL AND EXTERNAL AUDITS 7
- 4. PERFORMANCE EVALUATION ACCEPTANCE CRITERIA FOR ENVIRONMENTAL SAMPLE ANALYSIS 7
- 5. PERFORMANCE EVALUATION SAMPLES 7
- 6. QUALITY CONTROL PROGRAM FOR ENVIRONMENTAL SAMPLE ANALYSIS 8
- 7.
SUMMARY
OF DATA RESULTS 9
- 8.
SUMMARY
OF PARTICIPATION IN THE ECKERT & ZIEGLER ANALYTICS ENVIRONMENTAL CROSS-CHECK PROGRAM 9
- 9.
SUMMARY
OF PARTICIPATION IN THE MAPEP MONITORING PROGRAM 9
- 10.
SUMMARY
OF PARTICIPATION IN THE ERA MRAD PT PROGRAM 9
- 11.
SUMMARY
OF PARTICIPATION IN THE ERA PT PROGRAM 9
- 12. CORRECTIVE ACTION REQUEST AND REPORT (CARR) 9
- 13. REFERENCES 11 TABLES TABLES 1-5 RADIOLOGICAL PROFICIENCY TESTING RESULTS 12 TABLES 6-7 INTRA-LABORATORY DATA SUMMARIES 46 TABLE 8 CORRECTIVE ACTIONS 64
pg. 4 TABLE OF CONTENTS (CONTINUED)
FIGURES Figure 1 Cobalt-60 Performance Evaluation Results and % Bias........................................... 37 Figure 2 Cesium-137 Performance Evaluation Results and % Bias....................................... 38 Figure 3 Tritium Performance Evaluation Results and % Bias................................................ 39 Figure 4 Strontium-90 Performance Evaluation Results and % Bias....................................... 40 Figure 5 Gross Alpha Performance Evaluation Results and % Bias........................................ 41 Figure 6 Gross Beta Performance Evaluation Results and % Bias......................................... 42 Figure 7 Iodine-131 Performance Evaluation Results and % Bias.......................................... 43 Figure 8 Americium-241 Performance Evaluation Results and % Bias................................... 44 Figure 9 Plutonium-238 Performance Evaluation Results and % Bias.................................... 45
pg. 5 2024 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)
- 1.
Introduction GEL Laboratories, LLC (GEL) is a privately owned environmental laboratory dedicated to providing personalized client services of the highest quality. GEL was established as an analytical testing laboratory in 1981. Now a full-service lab, our analytical divisions use state of the art equipment and methods to provide a comprehensive array of organic, inorganic, and radiochemical analyses to meet the needs of our clients.
At GEL, quality is emphasized at every level of personnel throughout the company.
Managements ongoing commitment to good professional practice and to the quality of our testing services to our customers is demonstrated by their dedication of personnel and resources to develop, implement, assess, and improve our technical and management operations.
The purpose of GELs quality assurance program is to establish policies, procedures, and processes to meet or exceed the expectations of our clients. To achieve this, all personnel that support these services to our clients are introduced to the program and policies during their initial orientation, and annually thereafter during company-wide training sessions.
GELs primary goals are to ensure that all measurement data generated are scientifically and legally defensible, of known and acceptable quality per the data quality objectives (DQOs), and thoroughly documented to provide sound support for environmental decisions. In addition, GEL continues to ensure compliance with all contractual requirements, environmental standards, and regulations established by local, state, and federal authorities.
GEL administers the QA program in accordance with the Quality Assurance Plan, GL-QS-B-001. Our Quality Systems include all quality assurance (QA) policies and quality control (QC) procedures necessary to plan, implement, and assess the work we perform. GELs QA Program establishes a quality management system (QMS) that governs all of the activities of our organization.
This report entails the quality assurance program for the proficiency testing and environmental monitoring aspects of GEL for 2024. GELs QA Program is designed to monitor the quality of analytical processing associated with environmental, radiobioassay, effluent (10 CFR Part 50), and waste (10 CFR Part 61) sample analysis.
This report covers the category of Radiological Environmental Monitoring Program (REMP) and includes:
Intra-laboratory QC results analyzed during 2024.
Inter-laboratory QC results analyzed during 2024 where known values are available.
- 2.
Quality Assurance Programs for Inter-laboratory, Intra-laboratory and Third Party Cross-Check In addition to internal and client audits, our laboratory participates in annual performance evaluation studies conducted by independent providers. We routinely participate in the following types of performance audits:
Proficiency testing and other inter-laboratory comparisons Performance requirements necessary to retain certifications
pg. 6 Evaluation of recoveries of certified reference and in-house secondary reference materials using statistical process control data.
Evaluation of relative percent difference between measurements through SPC data.
We also participate in a number of proficiency testing programs for federal and state agencies and as required by contracts. It is our policy that no proficiency evaluation samples be analyzed in any special manner. Our annual performance evaluation participation generally includes a combination of studies that support the following:
US Environmental Protection Agency Discharge Monitoring Report, Quality Assurance Program (DMR-QA). Annual national program sponsored by EPA for laboratories engaged in the analysis of samples associated with the NPDES monitoring program.
Participation is mandatory for all holders of NPDES permits. The permit holder must analyze for all of the parameters listed on the discharge permit. Parameters include general chemistry, metals, BOD/COD, oil and grease, ammonia, nitrates, etc.
Department of Energy Mixed Analyte Performance Evaluation Program (MAPEP). A semiannual program developed by DOE in support of DOE contractors performing waste analyses. Participation is required for all laboratories that perform environmental analytical measurements in support of environmental management activities. This program includes radioactive isotopes in water, soil, vegetation and air filters.
ERAs MRAD-Multimedia Radiochemistry Proficiency test program. This program is for labs seeking certification for radionuclides in wastewater and solid waste. The program is conducted in strict compliance with USEPA National Standards for Water Proficiency study.
ERAs InterLaB RadCheM Proficiency Testing Program for radiological analyses. This program completes the process of replacing the USEPA EMSL-LV Nuclear Radiation Assessment Division program discontinued in 1998. Laboratories seeking certification for radionuclide analysis in drinking water also use the study. This program is conducted in strict compliance with the USEPA National Standards for Water Proficiency Testing Studies. This program encompasses Uranium by EPA method 200.8 (for drinking water certification in Utah/Primary NELAP), gamma emitters, Gross Alpha/Beta, Iodine-131, naturally occurring radioactive isotopes, Strontium-89/90, and Tritium.
ERAs Water Pollution (WP) biannual program for waste methodologies includes parameters for both organic and inorganic analytes.
ERAs Water Supply (WS) biannual program for drinking water methodologies includes parameters for organic and inorganic analytes.
Environmental Cross-Check Program administered by Eckert & Ziegler Analytics, Inc.
This program encompasses radionuclides in water, soil, milk, naturally occurring radioactive isotopes in soil and air filters.
GEL procures single-blind performance evaluation samples from Eckert & Ziegler Analytics to verify the analysis of sample matrices processed at GEL. Samples were received on a quarterly basis in 2024. GELs Third-Party Cross-Check Program provides environmental matrices encountered in a typical nuclear utility REMP. The Third-Party Cross-Check Program is intended to meet or exceed the inter-laboratory comparison program requirements discussed in NRC Regulatory Guide 4.15. Once performance evaluation samples have been prepared in accordance with the instructions provided by the PT provider, samples are managed and analyzed in the same manner as environmental samples from GELs clients.
pg. 7
- 3.
Quality Assurance Program for Internal and External Audits During each annual reporting period, at least one internal assessment of each area of the laboratory is conducted in accordance with the pre-established schedule from Standard Operating Procedure for the Conduct of Quality Audits, GL-QS-E-001. The annual internal audit plan is reviewed for adequacy and includes the scheduled frequency and scope of quality control actions necessary to GELs QA program. Internal audits are conducted at least annually in accordance with a schedule approved by the Quality Systems Director.
Supplier audits are contingent upon the categorization of the supplies and may or may not be conducted prior to the use of a supplier or subcontractor. Type I suppliers and subcontractors, regardless of how they were initially qualified, are re-evaluated at least once every three years.
In addition, prospective customers audit GEL during pre-contract audits. GEL hosts several external audits each year for both our clients and other programs. These programs include environmental monitoring, waste characterization, and radiobioassay. The following list of programs may audit GEL at least annually or up to every three years depending on the program.
TNI, The NELAC Institute, National Environmental Laboratory Accreditation Program DOECAP, U.S. Department of Energy Consolidated Audit Program DOELAP, U.S. Department of Energy Laboratory Accreditation Program DOE QSAS, U.S. Department of Energy, Quality Systems for Analytical Services ISO/IEC 17025:2017 A2LA, American Association for Laboratory Accreditation DoD ELAP, US Department of Defense Environmental Accreditation Program NUPIC, Nuclear Procurement Issues Committee South Carolina Department of Health and Environmental Control (SC DHEC)
The annual radiochemistry laboratory internal audit (24-RAD-001) was conducted in September of 2024. There were no findings, three observations and no recommendations for improvement from this assessment.
- 4.
Performance Evaluation Acceptance Criteria for Environmental Sample Analysis GEL utilized an acceptance protocol based upon two performance models. For those inter-laboratory programs that already have established performance criteria for bias (i.e.,
MAPEP, and ERA/ELAP), GEL will utilize the criteria for the specific program. For intra-laboratory or third-party quality control programs that do not have a specific acceptance criteria (i.e. the Eckert-Ziegler Analytics Environmental Cross-check Program), results will be evaluated in accordance with GELs internal acceptance criteria.
- 5.
Performance Evaluation Samples Performance Evaluation (PE) results and internal quality control sample results are evaluated in accordance with GEL acceptance criteria. The first criterion concerns bias, which is defined as the deviation of any one result from the known value. The second criterion concerns precision, which deals with the ability of the measurement to be replicated by comparison of an individual result with the mean of all results for a given sample set.
At GEL, we also evaluate our analytical performance on a regular basis through statistical process control (SPC) acceptance criteria. Where feasible, this criterion is applied to both measures of precision and accuracy and is specific to sample matrix. We establish environmental process control limits at least annually.
For Radiochemistry analysis, quality control evaluation is based on static limits rather than those that are statistically derived. Our current process control limits are maintained in
pg. 8 GELs LIMS. We also measure precision with matrix duplicates and/or matrix spike duplicates. The upper and lower control limits (UCL and LCL respectively) for precision are plus or minus three times the standard deviation from the mean of a series of relative percent differences. The static precision criteria for radiochemical analyses are 0 - 20%,
for activity levels exceeding the contract required detection limit (CRDL).
- 6.
Quality Control Program for Environmental Sample Analysis GELs internal QA Program is designed to include QC functions such as instrumentation calibration checks (to insure proper instrument response), blank samples, instrumentation backgrounds, duplicates, as well as overall staff qualification analyses and statistical process controls. Both quality control and qualification analyses samples are used to be as similar as the matrix type of those samples submitted for analysis by the various laboratory clients. These performance test samples (or performance evaluation samples) are either actual sample submitted in duplicate in order to evaluate the precision of laboratory measurements, or fortified blank samples, which have been given a known quantity of a radioisotope that is in the interest to GELs clients.
Accuracy (or Bias) is measured through laboratory control samples and/or matrix spikes, as well as surrogates and internal standards. The UCLs and LCLs for accuracy are plus or minus three times the standard deviation from the mean of a series of recoveries. The static limit for most radiochemical analyses is 75 - 125%. Specific instructions for out-of-control situations are provided in the applicable analytical SOP.
GELs Laboratory Control Standard (LCS) is an aliquot of reagent water or other blank matrix to which known quantities of the method analytes are added in the laboratory. The LCS is analyzed exactly like a sample, and its purpose is to determine whether the methodology is in control, and whether the laboratory is capable of making accurate and precise measurements. Some methods may refer to these samples as Laboratory Fortified Blanks (LFB). The requirement for recovery is between 75% and 125% for radiological analyses excluding drinking water matrix.
Bias (%) = (observed concentration)
- 100 %
(known concentration)
Precision is a data quality indicator of the agreement between measurements of the same property, obtained under similar conditions, and how well they conform to themselves.
Precision is usually expressed as standard deviation, variance or range in either absolute or relative (percentage) terms.
GELs laboratory duplicate (DUP or LCSD) is an aliquot of a sample taken from the same container and processed in the same manner under identical laboratory conditions. The aliquot is analyzed independently from the parent sample and the results are compared to measure precision and accuracy.
If a sample duplicate is analyzed, it will be reported as Relative Percent Difference (RPD).
The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%.
If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC. The RPD must be 100%
or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.
Difference (%) = (high duplicate result - low duplicate result)
- 100 %
(average of results)
pg. 9
- 7.
Summary of Data Results During 2024, forty-one (41) radioisotopes associated with six (6) matrix types were analyzed under GELs Performance Evaluation program in participation with ERA, MAPEP, and Eckert & Ziegler Analytics. Matrix types were representative of client analyses performed during 2024. Of the four hundred sixty-three (463) total results, 96.1% (445 of 463) were found to be acceptable within the PT providers three sigma or other statistical criteria. The list below contains the type of matrix evaluated by GEL.
Air Filter Cartridge Water Milk Soil Vegetation Graphs are provided in Figures 1-9 of this report to allow for the evaluation of trends or biases. These graphs include radioisotopes Cobalt-60, Cesium-137, Tritium, Strontium-90, Gross Alpha, Gross Beta, Iodine-131, Americium-241, and Plutonium-238.
- 8.
Summary of Participation in the Eckert & Ziegler Analytics Environmental Cross-Check Program Eckert & Ziegler Analytics provided samples for sixty-nine (69) individual environmental analyses. The accuracy of each result reported to Eckert & Ziegler Analytics, Inc. is measured by the ratio of GELs result to the known value. Of the 69 analyses reported, 97% (67 out of 69) fell within the acceptance criteria.
- 9.
Summary of Participation in the MAPEP Monitoring Program MAPEP Series 49, Series 50 and Series 51 were analyzed by the laboratory. Of the two hundred five (205) analyses reported, 97.1% (199 out of 205) fell within the PT providers acceptance criteria.
- 10.
Summary of Participation in the ERA MRaD PT Program The ERA MRad program provided samples (MRAD-40 and MRAD-41) for one hundred forty-eight (148) individual environmental analyses reported. Of the 148 analyses reported, 97.3% (144 of the 148) fell within the PT providers acceptance criteria.
- 11.
Summary of Participation in the ERA PT Program The ERA program provided samples (RAD-136, RAD-137, RAD-138 and RAD-139) for forty-one (41) individual environmental analyses. Of the 41 analyses reported, 80.5% (33 of 41) fell within the PT providers acceptance criteria.
- 12.
Corrective Action Request and Report (CARR)
There are two categories of corrective action at GEL. One is corrective action implemented at the analytical and data review level in accordance with the analytical SOP. The other is formal corrective action documented by the Quality Systems Team in accordance with GL-QS-E-002. A formal corrective action is initiated when a nonconformance reoccurs or is so significant that permanent elimination or prevention of the problem is required. Formal corrective action investigations include root cause analysis.
GEL includes quality requirements in most analytical standard operating procedures to ensure that data are reported only if the quality control criteria are met or the quality control
pg. 10 measures that did not meet the acceptance criteria are documented. A formal corrective action is implemented according to GL-QS-E-002 for Conducting Corrective/Preventive Action and Identifying Opportunities for Improvement. Recording and documentation is performed following guidelines stated in GL-QS-E-012 for Client NCR Database Operation.
Any employee at GEL can identify and report a nonconformance and request that corrective action be taken. Any GEL employee can participate on a corrective action team as requested by the QS team or Group Leaders. The steps for conducting corrective action are detailed in GL-QS-E-002. In the event that correctness or validity of the laboratorys test results in doubt, the laboratory will take corrective action. If investigations show that the results have been impacted, affected clients will be informed of the issue in writing within five (5) calendar days of the discovery.
Table 8 provides the status of CARRs for radiological performance testing during 2024. It has been determined that the causes of the unacceptable results did not impact any data reported to our clients.
pg. 11
- 13.
References
- 1.
GEL Quality Assurance Plan, GL-QS-B-001
- 2.
GEL Standard Operating Procedure for the Conduct of Quality Audits, GL-QS-E-001
- 3.
GEL Standard Operating Procedure for Conducting Corrective/Preventive Action and Identifying Opportunities for Improvement, GL-QS-E-002
- 4.
GEL Standard Operating Procedure for LIMS Documentation of Nonconformance Reporting and Dispositioning and Control of Nonconforming Items, GL-QS-E-004
- 5.
GEL Standard Operating Procedure for Handling Proficiency Evaluation Samples, GL-QS-E-013
- 6.
GEL Standard Operating Procedure for Quality Assurance Measurement Calculations and Processes, GL-QS-E-014
- 7.
40 CFR Part 136 Guidelines Establishing Test Procedures for the Analysis of Pollutants
- 8.
ISO/IEC 17025-2017, General Requirements for the Competence of Testing and Calibration Laboratories
- 9.
ANSI/ASQC E4-1994, Specifications and Guidelines for Quality Systems for Environmental Data Collection and Environmental Technology Programs, American National Standard
- 10.
2016 TNI Standard, The NELAC Institute, National Environmental Accreditation Program
- 11.
MARLAP, Multi-Agency Radiological Laboratory Analytical Protocols
- 12.
10 CFR Part 21, Reporting of Defects and Noncompliance
- 13.
10 CFR Part 50 Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants
- 14.
10 CFR Part 61, Licensing Requirements for Land Disposal and Radioactive Waste
- 15.
NRC REG Guide 4.15 and NRC REG Guide 4.8
pg. 12 TABLE 1 2024 RADIOLOGICAL PROFICIENCY TESTING RESULTS AND ACCEPTANCE CRITERIA PT Provide r
Quarter
/ Year Report Closing /
Received Date Sample Number Sample Media Units Analyte Reporte d Value Assigne d Value Acceptanc e Limits Performanc e Evaluation ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Barium-133 30.1 31.3 19.0 - 43.6 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Cesium-134 31.2 28 16.0 - 40.0 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Cesium-137 52.8 47.7 24.5 - 70.9 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Cobalt-60 96.7 84 66.4 - 102 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Gross Alpha 32.6 35.2 25.7 - 44.7 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Gross Beta 44 55.5 41.1 - 69.9 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Iodine-131 16.1 26.3 22.7-29.9 Not Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Strontium-89 47.4 47.8 33.8-61.8 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Strontium-90 51.3 43.1 36.9 - 49.3 Not Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Tritium 9790 10300 8350 -
12300 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water
µg/L Uranium (mass) 49.25 54.3 47.9 - 60.7 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Uranium (Nat) 38.9 37.2 32.9 - 41.5 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/L Zinc-65 322 284 228 - 340 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Actinium-228 1650 1590 1050-2000 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Americium-241 2450 1880 1020-2660 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Americium-241 65.6 55 39.3-73.3 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Americium-241 156 139 95.4-178 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Americium-241 1080 1210 749-1710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Bismuth-212 1250 1670 478-2490 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Bismuth-214 856 786 377-1170 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Cesium-134 3530 3500 2390-4180 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Cesium-134 262 273 177-335 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Cesium-134 402 415 313-456 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Cesium-134 1220 1290 856-1720 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Cesium-137 10600 9150 6920-11600 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Cesium-137 120 106 87.1-139 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Cesium-137 2400 2310 1980-2630 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Cesium-137 2440 2420 1860-3260 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Cobalt-60 9240 8400 6620-11600 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Cobalt-60 1210 1120 952-1420 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Cobalt-60 1570 1500 1290-1720 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Cobalt-60 2240 2090 1640-2730 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Curium-244 1600 1750 987-2150 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Gross Alpha 112 95.9 50.1-158 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Gross Alpha 144 168 61.3-232 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Gross Beta 33.7 22.2 13.5-33.5 Not Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Gross Beta 180 175 87.5-241 Acceptable
pg. 13 ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Iron-55 325 386 141-616 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Iron-55 2060 2480 1460-3610 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Lead-212 1870 1650 1150-2090 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Lead-214 1060 851 357-1340 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Manganese-54
<31.1
<555 0.00-555 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
<40.1
<35.0 0.00-35.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Manganese-54
<10.2
<71.0 0.00-71.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Manganese-54
<40.1
<207 0.00-207 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Plutonium-238 556 512 255-778 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Plutonium-238 42.9 41.1 31.0-50.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Plutonium-238 59.9 70.4 42.3-91.2 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Plutonium-238 3270 3520 2440-4540 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Plutonium-239 628 545 297-784 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Plutonium-239 57.1 56.1 41.9-67.7 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Plutonium-239 59.5 76.5 47.3-94.3 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Plutonium-239 245 216 149-273 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Potassium-40 44000 41800 28800-49900 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Potassium-40 34600 33300 25000-42200 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Strontium-90 3350 3630 1130-5650 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Strontium-90 143 158 99.9-215 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Strontium-90 397 316 228-391 Not Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Strontium-90 1680 2100 1180-2740 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Thorium-234 6260 4320 1630-7400 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Tritium 12000 13100 9870-15900 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil
µg/kg Uranium (mass) 16000 12900 5820-17400 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter
µg/Filter Uranium (mass) 35.6 34.4 27.6-40.3 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water
µg/L Uranium (mass) 517 537 435-609 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
µg/kg Uranium (mass) 6330 6490 4980-8040 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Uranium-234 4990 4360 2040-5710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Uranium-234 11.9 11.6 8.60-13.6 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Uranium-234 171 181 138-207 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Uranium-234 2160 2190 1540-2790 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Uranium-238 5320 4320 2370-5800 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Uranium-238 11.8 11.5 8.68-13.7 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Uranium-238 172 179 139-211 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Uranium-238 2110 2170 1530-2710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Uranium-Total 10600 8880 4930-11500 Acceptable
pg. 14 ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Uranium-Total 24.7 23.6 17.2-28.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Uranium-Total 353 368 287-420 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Uranium-Total 4400 4450 2840-6000 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Soil pCi/kg Zinc-65 6550 4920 3930-6710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Filter pCi/Filte r
Zinc-65 86.2 77.2 63.3-118 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Water pCi/L Zinc-65 567 503 448-635 Acceptable ERA 2nd/202 4
5/21/2024 MRAD-40 Vegetatio n
pCi/kg Zinc-65 1720 1510 1130-2240 Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/L Iodine-131 20.4 25.1 21.7-28.5 Not Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/L Radium-226 10.1 13.4 11.1-15.7 Not Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/L Radium-228 5.58 6.24 4.17-8.31 Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/L Strontium-90 35.3 37.6 32.0-43.2 Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/L Strontium-90 31.3 37.6 32.0-43.2 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Barium-133 40 38.2 25.2-51.2 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Cesium-134 14.6 18.9 7.81-30.0 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Cesium-137 66.8 57 32.9-81.1 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Cobalt-60 79.5 76.8 59.9-93.7 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Gross Alpha 11.4 13 7.94-18.1 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Gross Alpha 11.1 13 7.94-18.2 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Gross Beta 19.7 20.6 13.2-28.0 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Iodine-131 23.5 27.9 24.2-31.6 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Radium-226 17.4 17.2 14.6-19.8 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Radium-228 5.57 4.63 2.88-6.38 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Radium-228 7.61 7.16 4.50-9.18 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Strontium-89 69.5 64.7 49.0-80.4 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Strontium-89 71.1 64.7 49.0-80.4 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Strontium-90 16.3 21.9 17.9-25.9 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Strontium-90 16.6 21.9 17.9-25.10 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Tritium 7470 7550 5870-9230 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Tritium 7080 7550 5870-9230 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water
µg/L Uranium (mass) 48.1 53.6 47.3-59.9 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Uranium (Nat) 37 36.8 37.5-41.1 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/L Zinc-65 327 312 253-371 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Actinium-228 1290 1150 759 - 1450 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Americium-241 1650 1110 599-1570 Not Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Americium-241 2730 2970 1840 - 4190 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Americium-241 30.6 29.1 20.8 - 38.8 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Americium-241 130 117 80.3 - 150 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Bismuth-212 1240 1120 321 - 1670 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Bismuth-214 651 617 296 - 918 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Cesium-134 1800 1810 1240 - 2160 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Cesium-134 2270 2460 1630 - 3270 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Cesium-134 571 581 377 - 712 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Cesium-134 2060 2190 1650 - 2410 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Cesium-137 1510 1370 1040 - 1730 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Cesium-137 912 889 683 - 1200 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Cesium-137 912 848 696 - 1110 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Cesium-137 1570 1550 1330 - 1760 Acceptable
pg. 15 ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Cobalt-60 3750 4000 3150 - 4940 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Cobalt-60 1040 975 765 - 1270 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Cobalt-60 956 839 713 - 1070 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Cobalt-60 1120 1050 906 - 1200 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Curium-244 739 800 451 - 995 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Gross Alpha 83.9 72.4 37.8-119 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Gross Alpha 33.9 52.1 19.0 - 71.8 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Gross Beta 62.4 47.9 29.0 - 72.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Gross Beta 51.5 51.7 25.8 - 71.1 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Iron-55 963 800 292 - 1280 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Iron-55 1480 1230 723 - 1790 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Lead-212 1470 1160 809 - 1470 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Lead-214 783 652 274 - 1020 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Manganese-54
<32.3
<555
<555 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Manganese-54
<36.0
<207
<207 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Manganese-54
<5.51
<35.0
<35.0 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Manganese-54
<11.3
<71.0
<71.0 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Plutonium-238 1850 1860 928 - 2830 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Plutonium-238 2760 2750 1900 - 3550 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Plutonium-238 22.7 21.5 16.2 - 26.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Plutonium-238 63.7 103 61.9 - 133 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Plutonium-239 963 1030 561 - 1480 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Plutonium-239 3310 3450 2380 - 4370 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Plutonium-239 35.6 32.4 24.2 - 39.1 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Plutonium-239 79 133 82.3 - 164 Not Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Potassium-40 36700 35300 24300 -
42200 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Potassium-40 32100 28500 21400 -
36100 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Strontium-90 3190 4730 1470 - 7370 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Strontium-90 1310 1380 778 - 1800 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Strontium-90 111 105 66.4 - 143 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Strontium-90 276 277 199 - 342 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Thorium-234 3230 2840 1070 - 4860 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Tritium 16400 17600 13300 -
21400 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil
µg/kg Uranium (mass) 8090 8500 3840 -
11500 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil
µg/kg Uranium (mass) 7060 8500 3840 -
11500 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation
µg/kg Uranium (mass) 2750 2550 1960 - 3160 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter
µg/Filter Uranium (mass) 89.7 92.5 74.2 - 108 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter
µg/Filter Uranium (mass) 86.2 92.5 74.2 - 108 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water
µg/L Uranium (mass) 510 522 423 - 592 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water
µg/L Uranium (mass) 458 522 423 - 592 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-234 2700 2860 1340 - 3750 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-234 3250 2860 1340 - 3750 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Uranium-234 853 859 603 - 1100 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-234 30.5 31.1 23.1 - 36.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-234 34.6 31.1 23.1 - 36.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-234 168 176 134 - 201 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-234 191 176 134 - 201 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-238 2700 2840 1560 - 3810 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-238 2360 2840 1560 - 3810 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Uranium-238 914 852 602 - 1070 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-238 29.9 30.9 23.3 - 36.9 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-238 28.8 30.9 23.3 - 36.9 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-238 170 174 135 - 205 Acceptable
pg. 16 ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-238 153 174 135 - 205 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-Total 5550 5830 3240 - 7540 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-Total 5718 5830 3240 - 7540 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Uranium-Total 1830 1750 1120 - 2360 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-Total 62 63.4 46.3 - 75.2 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-Total 64.72 63.4 46.3 - 75.2 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-Total 348 358 279 - 408 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-Total 351 358 279 - 408 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Zinc-65 2980 2860 2280 - 3900 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Zinc-65 2180 2000 1490 - 2970 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Zinc-65 274 239 196 - 365 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Zinc-65 556 526 468 - 664 Acceptable ERA 4th/2024 11/20/24 RAD-139 Water pCi/L Iodine-131 25.8 26.3 22.7-29.0 Acceptable ERA 4th/2024 11/20/24 RAD-139 Water pCi/L Strontium-90 31.2 35.6 30.2-41.0 Acceptable ERA 4th/2024 11/20/24 RAD-139 Water pCi/L Strontium-90 33.3 35.6 30.2-41.0 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Cerium-141 3.79E+0 1
2.88E+01 1.32 Not Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Cerium-141 5.15E+0 1
3.75E+01 1.37 Not Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Cesium-134 1.75E+0 2
1.85E+02 0.94 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Cesium-134 2.32E+0 2
2.42E+02 0.96 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Cesium-137 1.85E+0 2
1.75E+02 1.05 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Cesium-137 2.26E+0 2
2.29E+02 0.99 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Chromium-51 2.64E+0 2
2.24E+02 1.18 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Chromium-51 3.57E+0 2
2.91E+02 1.22 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Cobalt-58 3.60E-01 NA NA Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Cobalt-58
-2.80E-01 NA NA Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Cobalt-60 3.26E+0 2
3.00E+02 1.09 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Cobalt-60 4.10E+0 2
3.91E+02 1.05 Acceptable EZA 2nd/202 4
08/16/24 E14180 Cartridge pCi Iodine-131 8.75E+0 1
9.13E+01 0.96 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Iodine-131 1.07E+0 2
9.19E+01 1.16 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Iodine-131 2.40E+0 1
1.85E+01 1.29 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Iron-59 1.60E+0 2
1.33E+02 1.20 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Iron-59 2.09E+0 2
1.74E+02 1.20 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Manganese-54 1.74E+0 2
1.56E+02 1.11 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Manganese-54 2.22E+0 2
2.04E+02 1.09 Acceptable EZA 2nd/202 4
08/16/24 E14181 Milk pCi/L Strontium-89 7.51E+0 1
8.42E+01 0.89 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Strontium-90 9.92E+0 0
1.32E+01 0.75 Acceptable EZA 2nd/202 4
08/16/24 E14182 Milk pCi/L Zinc-65 7.74E+0 1
7.60E+01 1.02 Acceptable EZA 2nd/202 4
08/16/24 E14183 Water pCi/L Zinc-65 1.21E+0 2
9.91E+01 1.22 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Cerium-141 1.23E+0 2
1.24E+02 0.99 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Cerium-141 1.32E+0 2
1.28E+02 1.03 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Cesium-134 1.63E+0 2
1.87E+02 0.87 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Cesium-134 1.72E+0 2
1.93E+02 0.89 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Cesium-137 1.23E+0 2
1.27E+02 0.97 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Cesium-137 1.33E+0 2
1.32E+02 1.01 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Chromium-51 2.78E+0 2
2.74E+02 1.01 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Chromium-51 2.81E+0 2
2.83E+02 0.99 Acceptable
pg. 17 EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Cobalt-58 1.58E+0 2
1.50E+02 1.06 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Cobalt-58 1.58E+0 2
1.54E+02 1.02 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Cobalt-60 2.41E+0 2
2.36E+02 1.02 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Cobalt-60 2.48E+0 2
2.43E+02 1.02 Acceptable EZA 3rd/2024 9/12/24 E14188 Cartridge pCi Iodine-131 9.71E+0 1
9.26E+01 1.05 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Iodine-131 8.34E+0 1
8.90E+01 0.94 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Iodine-131 1.01E+0 2
9.39E+01 1.08 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Iron-59 1.31E+0 2
1.13E+02 1.15 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Iron-59 1.32E+0 2
1.14E+02 1.13 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Manganese-54 1.60E+0 2
1.62E+02 0.99 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Manganese-54 1.84E+0 2
1.67E+02 1.10 Acceptable EZA 3rd/2024 9/12/24 E14189 Milk pCi/L Strontium-89 9.38E+0 1
9.23E+01 1.02 Acceptable EZA 3rd/2024 9/12/24 E14189 Milk pCi/L Strontium-90 1.19E+0 1
1.52E+01 0.78 Acceptable EZA 3rd/2024 9/12/24 E14190 Milk pCi/L Zinc-65 3.00E+0 2
2.75E+02 1.09 Acceptable EZA 3rd/2024 9/12/24 E14191 Water pCi/L Zinc-65 3.25E+0 2
2.84E+02 1.14 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Cerium-141 7.14E+0 1
7.16E+01 1
Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Cerium-141 9.90E+0 1
9.38E+01 1.06 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Cesium-134 9.91E+0 1
1.11E+02 0.90 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Cesium-134 1.37E+0 2
1.45E+02 0.94 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Cesium-137 1.36E+0 2
1.38E+02 0.98 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Cesium-137 1.87E+0 2
1.81E+02 1.03 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Chromium-51 2.07E+0 2
1.77E+02 1.17 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Chromium-51 2.76E+0 2
2.32E+02 1.19 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Cobalt-58 9.20E+0 1
9.37E+01 0.98 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Cobalt-58 1.32E+0 2
1.23E+02 1.07 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Cobalt-60 2.12E+0 2
2.10E+02 1.01 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Cobalt-60 3.01E+0 2
2.75E+02 1.09 Acceptable EZA 4th/2024 2/3/25 E14192 Cartridge pCi Iodine-131 6.85E+0 1
6.50E+01 1.05 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Iodine-131 5.60E+0 1
5.10E+02 1.10 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Iodine-131 6.63E+0 1
6.73E+01 0.99 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Iron-59 1.12E+0 2
1.02E+02 1.10 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Iron-59 1.57E+0 2
1.34E+02 1.17 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Manganese-54 9.84E+0 1
9.95E+01 0.99 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Manganese-54 1.49E+0 2
1.30E+02 1.14 Acceptable EZA 4th/2024 2/3/25 E14193 Milk pCi/L Strontium-89 6.22E+0 1
7.83E+01 0.79 Acceptable EZA 4th/2024 2/3/25 E14193 Milk pCi/L Strontium-90 8.57E+0 0
1.13E+01 0.76 Acceptable EZA 4th/2024 2/3/25 E14194 Milk pCi/L Zinc-65 1.73E+0 2
1.49E+02 1.16 Acceptable EZA 4th/2024 2/3/25 E14195 Water pCi/L Zinc-65 2.41E+0 2
1.95E+02 1.24 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Americium-241 0.872 1.07 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Americium-241 0.00297 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Americium-241 0.0991 0.942 0.0659-0.1225 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Americium-241 0.129 0.131 0.092-0.170 Acceptable
pg. 18 MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cesium-134 634 693 485-901 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cesium-134 10.1 11.3 7.9-14.7 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cesium-134 1.54 1.6 1.12-2.08 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cesium-134 4.65 4.98 3.49-6.47 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cesium-137 2010 1810 1267-2353 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cesium-137 9.09 8.7 6.1-11.3 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cesium-137 0.0177 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cesium-137 0.0079 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cobalt-57 1240 1060 742-1378 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cobalt-57 19.2 19.3 13.5-25.1 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cobalt-57 1.7 1.63 1.14-2.12 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cobalt-57 4.33 4.24 2.97-5.51 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cobalt-60 889 898 629-1167 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cobalt-60 0.0227 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cobalt-60 0.0136 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cobalt-60 2.89 2.79 1.95-3.63 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrF49 Filter Bq/smpl Gross Alpha 0.463 0.225 0.077-0.434 Not Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrW49 Water Bq/L Gross Alpha 1.44 1.59 0.48-2.70 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrF49 Filter Bq/smpl Gross Beta 1.45 1.49 0.75-2.24 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrW49 Water Bq/L Gross Beta 15.8 16.27 8.14-24.41 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Hydrogen-3 5.01 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Iron-55 1190 1280 896-1164 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Iron-55 34 41.1 28.8-53.4 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Manganese-54 0.0001 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Manganese-54 13.1 12.7 8.9-16.5 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Manganese-54 1.83 1.57 1.10-2.04 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Manganese-54 2.82 2.56 1.79-3.33 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Nickel-63 1520 1370 959-1781 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Nickel-63 0.842 1.11 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Plutonium-238 1.36 0.48 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Plutonium-238 0.69 0.726 0.508-0.944 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Plutonium-238 0.000523 0.00037 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Plutonium-238 0.163 0.186 0.130-0.242 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Plutonium-239/240 90.4 101 71-131 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Plutonium-239/240 0.703 0.784 0.549-1.019 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Plutonium-239/240 0.0516 0.0505 0.0354-0.0657 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Plutonium-239/240 0.163 0.184 0.129-0.239 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Potassium-40 595 574 402-746 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Potassium-40 0.873 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Radium-226 0.813 0.65 0.455-0.845 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Strontium-90 613 554 388-720 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Strontium-90 9.52 7.31 5.12-9.50 Not Acceptable
pg. 19 MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Strontium-90 0.518 0.614 0.430-0.798 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Strontium-90 1.38 1.17 0.82-1.52 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Technetium-99 6.24 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Technetium-99 9.19 8.85 6.20-11.51 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Thorium 228 48.2 44.8 31.4-58.2 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Thorium 230 59.2 41.1 28.8-53.4 Not Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Thorium 232 46.4 45.5 31.9-59.2 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg U-234/233 59.6 59 41-77 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Uranium-234/233 0.68 0.67 0.47-0.87 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Uranium-234/233 0.0926 0.09 0.063-0.117 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Uranium-234/233 0.086 0.091 0.064-0.118 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter ug/smpl Uranium-235 0.0562 0.0503 0.0352-0.0654 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Uranium-238 212 221 155-287 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Uranium-238 0.659 0.67 0.47-0.87 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter ug/smpl Uranium-238 7.91 7.3 5.1-9.5 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Uranium-238 0.0909 0.091 0.064-0.118 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Uranium-238 0.0961 0.092 0.064-0.120 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter ug/smpl Uranium-Total 7.9662 7.4 5.2-9.6 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Zinc-65 1300 1160 812-1508 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Zinc-65 21.1 19.1 13.4-24.8 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Zinc-65 2.34 1.89 1.32-2.46 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Zinc-65 0.0888 False pos.
test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Americium-241 1.35 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Americium-241
-0.0117 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Americium-241 0.0911 0.0897 0.0628-0.1166 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Americium-241 0.00088 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cesium-134 371 404 293-525 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cesium-134 0.00495 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Cesium-134
-0.0036 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Cesium-134 3.28 3.67 2.57-4.77 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cesium-137 1690 1550 1085-2015 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cesium-137 10.6 9.7 6.8-12.6 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Cesium-137 1.51 1.48 1.04-1.92 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Cesium-137 2.82 2.57 1.80-3.34 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cobalt-57 474 401 281-521 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cobalt-57 25.5 25.4 17.8-33.0 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Cobalt-57 0.801 0.819 0.573-1.065 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Cobalt-57 2.64 2.53 1.77-3.29 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cobalt-60 665 660 462-858 Acceptable
pg. 20 MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cobalt-60 10.5 10.27 7.19-13.35 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Cobalt-60 1.62 1.64 1.15-2.13 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Cobalt-60 3.14 2.96 2.07-3.85 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrF50 Filter Bq/smpl Gross Alpha 2.77 1.24 0.37-2.11 Not Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrW50 Water Bq/L Gross Alpha 0.897 1.01 0.30-1.72 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrF50 Filter Bq/smpl Gross Beta 1.84 1.81 0.91-2.72 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrW50 Water Bq/L Gross Beta 5.01 5.57 2.79-8.36 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Hydrogen-3 574 637 446-828 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Iron-55 921 650 455-845 Not Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Iron-55 15 19.7 13.8-25.6 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Manganese-54 368 332 232-432 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Manganese-54 7.87 7.36 5.15-9.57 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Manganese-54 0.575 0.555 0.389-0.722 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Manganese-54 0.0188 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Nickel-63 1130 1530 1071-1989 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Nickel-63 1.03 0.8 Sens.
Eval.
Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Plutonium-238 35.7 34.7 24.3-45.1 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Plutonium-238 0.731 0.745 0.522-0.969 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Plutonium-238 0.123 0.114 0.080-0.148 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Plutonium-238 0.0363 0.0413 0.0302-0.0560 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Plutonium-239/240 1.29 0.37 Sens.
Eval.
Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Plutonium-239/240 0.714 0.769 0.538-1.000 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Plutonium-239/240 0.0976 0.0936 0.0655-0.1217 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Plutonium-239/240 0.0397 0.431 0.0302-0.0560 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Potassium-40 538 485 340-631 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Potassium-40
-0.229 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Radium-226 0.321 0.31 0.217-0.403 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Strontium-90 352 440 308-572 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Strontium-90 3.41 3.68 2.58-4.78 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Strontium-90 1.69 1.56 1.09-2.03 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Strontium-90 0.391 0.529 0.370-0.688 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Technetium-99 283 336 235-437 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Technetium-99 5.96 7.47 5.23-9.71 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Thorium 228 47.8 48.8 34.2-63.4 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Thorium 230 48 54 38-70 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Thorium 232 42.9 45.1 31.6-58.6 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Uranium-234/233 36.8 40.7 28.5-52.9 Acceptable
pg. 21 MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Uranium-234/233 0.943 0.99 0.693-1.287 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Uranium-234/233 0.134 0.125 0.088-0.163 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Uranium-234/233 0.0709 0.067 0.047-0.087 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter ug/smpl Uranium-235 0.0739 0.0743 0.0520-0.0966 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Uranium-238 107 110 77-143 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Uranium-238 1.02 1.028 0.720-1.336 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter ug/smpl Uranium-238 10.1 10.4 7.3-13.5 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Uranium-238 0.136 0.13 0.091-0.169 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Uranium-238 0.077 0.07 0.049-0.091 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter ug/smpl Uranium-Total 10.1739 10.5 7.4-13.7 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Zinc-65 799 703 492-914 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Zinc-65
-0.079 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smpl Zinc-65 0.394 0.332 Sens.
Eval.
Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smpl Zinc-65 8.69 8.02 5.61-10.43 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Americium-241 2.42 0.26 Sens. Eval.
Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Americium-241 0.352 0.363 0.254-0.472 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Americium-241 0.0258 0.0211 0.0148-0.0274 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Americium-241 0.0907 0.087 0.061-0.113 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cesium-134 375 417 292-542 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cesium-134 19.5 22.3 15.6-29.0 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cesium-134 0.279 0.344 0.234-0.434 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cesium-134 2.67 2.89 2.02-3.76 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cesium-137 1790 1650 155-2145 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cesium-137
-0.0164 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cesium-137 0.335 0.269 0.188-0.350 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cesium-137 1.93 1.91 1.34-2.48 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cobalt-57 399 330 231-429 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cobalt-57 25.1 26.4 18.5-34.3 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cobalt-57 0.0109 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cobalt-57 0.00378 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cobalt-60 699 700 490-910 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cobalt-60 15.1 15 10.5-19.5 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cobalt-60 0.394 0.361 0.253-0.469 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cobalt-60 2.06 2.01 1.41-2.61 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrF51 Filter Bq/smpl Gross Alpha 1.2 1.2 0.36-2.04 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrW51 Water Bq/L Gross Alpha 1.07 1.29 0.39-2.19 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrF51 Filter Bq/smpl Gross Beta 0.761 0.644 0.322-0.966 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrW51 Water Bq/L Gross Beta 4.78 5.09 2.55-7.64 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Hydrogen-3 350 374 262-486 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Iron-55 873 780 546-1014 Acceptable
pg. 22 MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Iron-55 46.1 48.1 33.7-62.5 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Iron-59 62.4 57.5 40.3-74.8 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Manganese-54 125 113 79-147 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Manganese-54 0.0424 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Manganese-54
-0.0194 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Manganese-54 3.73 3.73 2.47-4.59 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Nickel-63 1130 1450 1015-1885 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Nickel-63
-1.31 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Plutonium-238 17 17.8 12.5-23.1 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Plutonium-238 0.377 0.439 0.307-0.571 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Plutonium-238 0.0152 0.0157 0.011-0.0204 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Plutonium-238 0.0363 0.0363 0.0258-0.0478 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Plutonium-239/240 49.6 50 35.0-65.0 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Plutonium-239/240 0.405 0.437 0.306-0.568 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Plutonium-239/240 0.0206 0.0215 0.0151-0.0280 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Plutonium-239/240 0.0341 0.0356 0.0249-0.0463 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Potassium-40 562 525 368-683 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Potassium-40
-0.241 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Radium-226 0.475 0.36 0.252-0.468 Not Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Strontium-90 388 487 341-633 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Strontium-90 11.1 11.2 7.8-14.6 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Strontium-90 0.865 0.91 0.64-1.18 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Strontium-90 2.46 2.39 1.67-3.11 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Technetium-99 204 171 120-222 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Technetium-99 10.6 11.2 7.8-14.6 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Thorium 228 45.4 43.3 30.3-56.3 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Thorium 230 43.3 44 30.8-57.2 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Thorium 232 41.9 42.6 29.8-55.4 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Uranium-234/233 46.1 50 35.0-65.0 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Uranium-234/233 0.333 0.38 0.266-0.494 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Uranium-234/233 0.093 0.093 0.065-0.121 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Uranium-234/233 0.0644 0.066 0.0462-0.0858 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter ug/smpl Uranium-235 0.0601 0.056 0.039-0.073 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Uranium-238 150 165 116-215 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Uranium-238 0.339 0.385 0.270-0.501 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter ug/smpl Uranium-238 8.25 7.8 5.5-10.1 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Uranium-238 0.0967 0.096 0.067-0.125 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Uranium-238 0.673 0.0685 0.0480-0.0891 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter ug/smpl Uranium-Total 8.31 7.8 5.5-10.1 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Zinc-65 476 415 291-540 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Zinc-65 24.5 22.8 16.0-29.6 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Zinc-65 0.0686 False Pos.
Test Acceptable
pg. 23 MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Zinc-65 10.1 9.13 6..39-11.87 Acceptable TABLE 2 2024 ECKERT & ZIEGLER ANALYTICS PERFORMANCE EVALUATION RESULTS PT Provider Quarter /
Year Report Closing /
Received Date Sampl e
Numb er Sample Media Units Analyte Reported Value Assigned Value Acceptance Limits Performance Evaluation EZA 2nd/2024 08/16/24 E1418 0
Cartridge pCi Iodine-131 8.75E+01 9.13E+01 0.96 Acceptable EZA 2nd/2024 08/16/24 E1418 1
Milk pCi/L Strontium-89 7.51E+01 8.42E+01 0.89 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Strontium-90 9.92E+00 1.32E+01 0.75 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Cerium-141 3.79E+01 2.88E+01 1.32 Not Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Cobalt-58 3.60E-01 NA NA Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Cobalt-60 3.26E+02 3.00E+02 1.09 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Chromium-51 2.64E+02 2.24E+02 1.18 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Cesium-134 1.75E+02 1.85E+02 0.94 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Cesium-137 1.85E+02 1.75E+02 1.05 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Iron-59 1.60E+02 1.33E+02 1.20 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Iodine-131 1.07E+02 9.19E+01 1.16 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Manganese-54 1.74E+02 1.56E+02 1.11 Acceptable EZA 2nd/2024 08/16/24 E1418 2
Milk pCi/L Zinc-65 7.74E+01 7.60E+01 1.02 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Cerium-141 5.15E+01 3.75E+01 1.37 Not Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Cobalt-58
-2.80E-01 NA NA Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Cobalt-60 4.10E+02 3.91E+02 1.05 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Chromium-51 3.57E+02 2.91E+02 1.22 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Cesium-134 2.32E+02 2.42E+02 0.96 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Cesium-137 2.26E+02 2.29E+02 0.99 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Iron-59 2.09E+02 1.74E+02 1.20 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Iodine-131 2.40E+01 1.85E+01 1.29 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Manganese-54 2.22E+02 2.04E+02 1.09 Acceptable EZA 2nd/2024 08/16/24 E1418 3
Water pCi/L Zinc-65 1.21E+02 9.91E+01 1.22 Acceptable EZA 3rd/2024 9/12/24 E1418 8
Cartridge pCi Iodine-131 9.71E+01 9.26E+01 1.05 Acceptable EZA 3rd/2024 9/12/24 E1418 9
Milk pCi/L Strontium-89 9.38E+01 9.23E+01 1.02 Acceptable EZA 3rd/2024 9/12/24 E1418 9
Milk pCi/L Strontium-90 1.19E+01 1.52E+01 0.78 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Cerium-141 1.23E+02 1.24E+02 0.99 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Cobalt-58 1.58E+02 1.50E+02 1.06 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Cobalt-60 2.41E+02 2.36E+02 1.02 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Chromium-51 2.78E+02 2.74E+02 1.01 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Cesium-134 1.63E+02 1.87E+02 0.87 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Cesium-137 1.23E+02 1.27E+02 0.97 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Iron-59 1.31E+02 1.13E+02 1.15 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Iodine-131 8.34E+01 8.90E+01 0.94 Acceptable EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Manganese-54 1.60E+02 1.62E+02 0.99 Acceptable
pg. 24 EZA 3rd/2024 9/12/24 E1419 0
Milk pCi/L Zinc-65 3.00E+02 2.75E+02 1.09 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Cerium-141 1.32E+02 1.28E+02 1.03 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Cobalt-58 1.58E+02 1.54E+02 1.02 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Cobalt-60 2.48E+02 2.43E+02 1.02 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Chromium-51 2.81E+02 2.83E+02 0.99 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Cesium-134 1.72E+02 1.93E+02 0.89 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Cesium-137 1.33E+02 1.32E+02 1.01 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Iron-59 1.32E+02 1.14E+02 1.13 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Iodine-131 1.01E+02 9.39E+01 1.08 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Manganese-54 1.84E+02 1.67E+02 1.10 Acceptable EZA 3rd/2024 9/12/24 E1419 1
Water pCi/L Zinc-65 3.25E+02 2.84E+02 1.14 Acceptable EZA 4th/2024 2/3/25 E1419 2
Cartridge pCi Iodine-131 6.85E+01 6.50E+01 1.05 Acceptable EZA 4th/2024 2/3/25 E1419 3
Milk pCi/L Strontium-89 6.22E+01 7.83E+01 0.79 Acceptable EZA 4th/2024 2/3/25 E1419 3
Milk pCi/L Strontium-90 8.57E+00 1.13E+01 0.76 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Cerium-141 7.14E+01 7.16E+01 1
Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Cobalt-58 9.20E+01 9.37E+01 0.98 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Cobalt-60 2.12E+02 2.10E+02 1.01 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Chromium-51 2.07E+02 1.77E+02 1.17 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Cesium-134 9.91E+01 1.11E+02 0.90 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Cesium-137 1.36E+02 1.38E+02 0.98 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Iron-59 1.12E+02 1.02E+02 1.10 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Iodine-131 5.60E+01 5.10E+02 1.10 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Manganese-54 9.84E+01 9.95E+01 0.99 Acceptable EZA 4th/2024 2/3/25 E1419 4
Milk pCi/L Zinc-65 1.73E+02 1.49E+02 1.16 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Cerium-141 9.90E+01 9.38E+01 1.06 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Cobalt-58 1.32E+02 1.23E+02 1.07 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Cobalt-60 3.01E+02 2.75E+02 1.09 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Chromium-51 2.76E+02 2.32E+02 1.19 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Cesium-134 1.37E+02 1.45E+02 0.94 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Cesium-137 1.87E+02 1.81E+02 1.03 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Iron-59 1.57E+02 1.34E+02 1.17 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Iodine-131 6.63E+01 6.73E+01 0.99 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Manganese-54 1.49E+02 1.30E+02 1.14 Acceptable EZA 4th/2024 2/3/25 E1419 5
Water pCi/L Zinc-65 2.41E+02 1.95E+02 1.24 Acceptable
pg. 25 TABLE 3 2024 DEPARTMENT OF ENERGY MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP) RESULTS PT Provide r
Quarter
/ Year Report Closing /
Received Date Sample Number Sampl e
Media Units Analyte Reported Value Assigne d Value Acceptance Limits Performanc e
Evaluation MAPEP 4th/2023 1/10/2024 MAPEP GrF49 Filter Bq/smpl Gross Alpha 0.463 0.225 0.077-0.434 Not Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrF49 Filter Bq/smpl Gross Beta 1.45 1.49 0.75-2.24 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrW49 Water Bq/L Gross Alpha 1.44 1.59 0.48-2.70 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP GrW49 Water Bq/L Gross Beta 15.8 16.27 8.14-24.41 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Americium-241 0.872 1.07 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cesium-134 634 693 485-901 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cesium-137 2010 1810 1267-2353 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cobalt-57 1240 1060 742-1378 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Cobalt-60 889 898 629-1167 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Iron-55 1190 1280 896-1164 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Manganese-54 0.0001 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Nickel-63 1520 1370 959-1781 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Plutonium-238 1.36 0.48 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Plutonium-239/240 90.4 101 71-131 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Potassium-40 595 574 402-746 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Strontium-90 613 554 388-720 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Technetium-99 6.24 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Thorium 228 48.2 44.8 31.4-58.2 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Thorium 230 59.2 41.1 28.8-53.4 Not Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Thorium 232 46.4 45.5 31.9-59.2 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg U-234/233 59.6 59 41-77 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Uranium-238 212 221 155-287 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaS49 Soil Bq/Kg Zinc-65 1300 1160 812-1508 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Americium-241 0.00297 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cesium-134 10.1 11.3 7.9-14.7 Acceptable
pg. 26 MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cesium-137 9.09 8.7 6.1-11.3 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cobalt-57 19.2 19.3 13.5-25.1 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Cobalt-60 0.0227 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Hydrogen-3 5.01 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Iron-55 34 41.1 28.8-53.4 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Manganese-54 13.1 12.7 8.9-16.5 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Nickel-63 0.842 1.11 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Plutonium-238 0.69 0.726 0.508-0.944 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Plutonium-239/240 0.703 0.784 0.549-1.019 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Potassium-40 0.873 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Radium-226 0.813 0.65 0.455-0.845 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Strontium-90 9.52 7.31 5.12-9.50 Not Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Technetium-99 9.19 8.85 6.20-11.51 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Uranium-234/233 0.68 0.67 0.47-0.87 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Uranium-238 0.659 0.67 0.47-0.87 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP MaW49 Water Bq/L Zinc-65 21.1 19.1 13.4-24.8 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter ug/smpl Uranium-235 0.0562 0.0503 0.0352-0.0654 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter ug/smpl Uranium-238 7.91 7.3 5.1-9.5 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter ug/smpl Uranium-Total 7.9662 7.4 5.2-9.6 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Americium-241 0.0991 0.942 0.0659-0.1225 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cesium-134 1.54 1.6 1.12-2.08 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cesium-137 0.0177 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cobalt-57 1.7 1.63 1.14-2.12 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Cobalt-60 0.0136 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Manganese-54 1.83 1.57 1.10-2.04 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Plutonium-238 0.000523 0.00037 Sens Eval Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Plutonium-239/240 0.0516 0.0505 0.0354-0.0657 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Strontium-90 0.518 0.614 0.430-0.798 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Uranium-234/233 0.0926 0.09 0.063-0.117 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Uranium-238 0.0909 0.091 0.064-0.118 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 Filter Bq/smpl Zinc-65 2.34 1.89 1.32-2.46 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Americium-241 0.129 0.131 0.092-0.170 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cesium-134 4.65 4.98 3.49-6.47 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cesium-137 0.0079 False pos.
test Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cobalt-57 4.33 4.24 2.97-5.51 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Cobalt-60 2.89 2.79 1.95-3.63 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Manganese-54 2.82 2.56 1.79-3.33 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Plutonium-238 0.163 0.186 0.130-0.242 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Plutonium-239/240 0.163 0.184 0.129-0.239 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Strontium-90 1.38 1.17 0.82-1.52 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Uranium-234/233 0.086 0.091 0.064-0.118 Acceptable MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Uranium-238 0.0961 0.092 0.064-0.120 Acceptable
pg. 27 MAPEP 4th/2023 1/10/2024 MAPEP RdF49 veg Bq/smpl Zinc-65 0.0888 False pos.
test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrF50 Filter Bq/smp l
Gross Alpha 2.77 1.24 0.37-2.11 Not Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrF50 Filter Bq/smp l
Gross Beta 1.84 1.81 0.91-2.72 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrW50 Water Bq/L Gross Alpha 0.897 1.01 0.30-1.72 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP GrW50 Water Bq/L Gross Beta 5.01 5.57 2.79-8.36 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Americium-241 1.35 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cesium-134 371 404 293-525 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cesium-137 1690 1550 1085-2015 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cobalt-57 474 401 281-521 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Cobalt-60 665 660 462-858 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Iron-55 921 650 455-845 Not Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Manganese-54 368 332 232-432 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Nickel-63 1130 1530 1071-1989 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Plutonium-238 35.7 34.7 24.3-45.1 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Plutonium-239/240 1.29 0.37 Sens. Eval.
Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Potassium-40 538 485 340-631 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Strontium-90 352 440 308-572 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Technetium-99 283 336 235-437 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Thorium 228 47.8 48.8 34.2-63.4 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Thorium 230 48 54 38-70 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Thorium 232 42.9 45.1 31.6-58.6 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Uranium-234/233 36.8 40.7 28.5-52.9 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Uranium-238 107 110 77-143 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaS50 Soil Bq/Kg Zinc-65 799 703 492-914 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Americium-241
-0.0117 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cesium-134
-0.00495 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cesium-137 10.6 9.7 6.8-12.6 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cobalt-57 25.5 25.4 17.8-33.0 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Cobalt-60 10.5 10.27 7.19-13.35 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Hydrogen-3 574 637 446-828 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Iron-55 15 19.7 13.8-25.6 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Manganese-54 7.87 7.36 5.15-9.57 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Nickel-63 1.03 0.8 Sens. Eval.
Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Plutonium-238 0.731 0.745 0.522-0.969 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Plutonium-239/240 0.714 0.769 0.538-1.000 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Potassium-40
-0.229 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Radium-226 0.321 0.31 0.217-0.403 Acceptable
pg. 28 MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Strontium-90 3.41 3.68 2.58-4.78 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Technetium-99 5.96 7.47 5.23-9.71 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Uranium-234/233 0.943 0.99 0.693-1.287 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Uranium-238 1.02 1.028 0.720-1.336 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP MaW50 Water Bq/L Zinc-65
-0.079 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter ug/smp l
Uranium-235 0.0739 0.0743 0.0520-0.0966 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter ug/smp l
Uranium-238 10.1 10.4 7.3-13.5 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter ug/smp l
Uranium-Total 10.1739 10.5 7.4-13.7 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Americium-241 0.0911 0.0897 0.0628-0.1166 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Cesium-134
-0.0036 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Cesium-137 1.51 1.48 1.04-1.92 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Cobalt-57 0.801 0.819 0.573-1.065 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Cobalt-60 1.62 1.64 1.15-2.13 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Manganese-54 0.575 0.555 0.389-0.722 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Plutonium-238 0.123 0.114 0.080-0.148 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Plutonium-239/240 0.0976 0.0936 0.0655-0.1217 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Strontium-90 1.69 1.56 1.09-2.03 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Uranium-234/233 0.134 0.125 0.088-0.163 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Uranium-238 0.136 0.13 0.091-0.169 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdF50 Filter Bq/smp l
Zinc-65 0.394 0.332 Sens. Eval.
Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Americium-241 0.00088 4
False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Cesium-134 3.28 3.67 2.57-4.77 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Cesium-137 2.82 2.57 1.80-3.34 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Cobalt-57 2.64 2.53 1.77-3.29 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Cobalt-60 3.14 2.96 2.07-3.85 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Manganese-54 0.0188 False Pos.
Test Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Plutonium-238 0.0363 0.0413 0.0302-0.0560 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Plutonium-239/240 0.0397 0.431 0.0302-0.0560 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Strontium-90 0.391 0.529 0.370-0.688 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Uranium-234/233 0.0709 0.067 0.047-0.087 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Uranium-238 0.077 0.07 0.049-0.091 Acceptable MAPE P
2nd/202 4
7/18/2024 MAPEP RdV50 Veg Bq/smp l
Zinc-65 8.69 8.02 5.61-10.43 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrF51 Filter Bq/smpl Gross Alpha 1.2 1.2 0.36-2.04 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrF51 Filter Bq/smpl Gross Beta 0.761 0.644 0.322-0.966 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrW51 Water Bq/L Gross Alpha 1.07 1.29 0.39-2.19 Acceptable MAPEP 4th/2024 12/17/24 MAPEP GrW51 Water Bq/L Gross Beta 4.78 5.09 2.55-7.64 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Americium-241 2.42 0.26 Sens. Eval.
Acceptable
pg. 29 MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cesium-134 375 417 292-542 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cesium-137 1790 1650 155-2145 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cobalt-57 399 330 231-429 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Cobalt-60 699 700 490-910 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Iron-55 873 780 546-1014 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Manganese-54 125 113 79-147 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Nickel-63 1130 1450 1015-1885 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Plutonium-238 17 17.8 12.5-23.1 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Plutonium-239/240 49.6 50 35.0-65.0 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Potassium-40 562 525 368-683 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Strontium-90 388 487 341-633 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Technetium-99 204 171 120-222 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Thorium 228 45.4 43.3 30.3-56.3 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Thorium 230 43.3 44 30.8-57.2 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Thorium 232 41.9 42.6 29.8-55.4 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Uranium-234/233 46.1 50 35.0-65.0 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Uranium-238 150 165 116-215 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaS51 Soil Bq/Kg Zinc-65 476 415 291-540 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Americium-241 0.352 0.363 0.254-0.472 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cesium-134 19.5 22.3 15.6-29.0 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cesium-137
-0.0164 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cobalt-57 25.1 26.4 18.5-34.3 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Cobalt-60 15.1 15 10.5-19.5 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Hydrogen-3 350 374 262-486 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Iron-55 46.1 48.1 33.7-62.5 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Iron-59 62.4 57.5 40.3-74.8 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Manganese-54 0.0424 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Nickel-63
-1.31 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Plutonium-238 0.377 0.439 0.307-0.571 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Plutonium-239/240 0.405 0.437 0.306-0.568 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Potassium-40
-0.241 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Radium-226 0.475 0.36 0.252-0.468 Not Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Strontium-90 11.1 11.2 7.8-14.6 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Technetium-99 10.6 11.2 7.8-14.6 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Uranium-234/233 0.333 0.38 0.266-0.494 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Uranium-238 0.339 0.385 0.270-0.501 Acceptable MAPEP 4th/2024 12/17/24 MAPEP MaW51 Water Bq/L Zinc-65 24.5 22.8 16.0-29.6 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter ug/smpl Uranium-235 0.0601 0.056 0.039-0.073 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter ug/smpl Uranium-238 8.25 7.8 5.5-10.1 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter ug/smpl Uranium-Total 8.31 7.8 5.5-10.1 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Americium-241 0.0258 0.0211 0.0148-0.0274 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cesium-134 0.279 0.344 0.234-0.434 Acceptable
pg. 30 MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cesium-137 0.335 0.269 0.188-0.350 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cobalt-57 0.0109 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Cobalt-60 0.394 0.361 0.253-0.469 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Manganese-54
-0.0194 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Plutonium-238 0.0152 0.0157 0.011-0.0204 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Plutonium-239/240 0.0206 0.0215 0.0151-0.0280 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Strontium-90 0.865 0.91 0.64-1.18 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Uranium-234/233 0.093 0.093 0.065-0.121 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Uranium-238 0.0967 0.096 0.067-0.125 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdF51 Filter Bq/smpl Zinc-65 0.0686 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Americium-241 0.0907 0.087 0.061-0.113 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cesium-134 2.67 2.89 2.02-3.76 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cesium-137 1.93 1.91 1.34-2.48 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cobalt-57 0.00378 False Pos.
Test Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Cobalt-60 2.06 2.01 1.41-2.61 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Manganese-54 3.73 3.73 2.47-4.59 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Plutonium-238 0.0363 0.0363 0.0258-0.0478 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Plutonium-239/240 0.0341 0.0356 0.0249-0.0463 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Strontium-90 2.46 2.39 1.67-3.11 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Uranium-234/233 0.0644 0.066 0.0462-0.0858 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Uranium-238 0.673 0.0685 0.0480-0.0891 Acceptable MAPEP 4th/2024 12/17/24 MAPEP RdV51 Veg Bq/smpl Zinc-65 10.1 9.13 6..39-11.87 Acceptable
pg. 31 TABLE 4 2024 ERA PROGRAM PERFORMANCE EVALUATION RESULTS PT Provide r
Quarter /
Year Report Closing /
Received Date Sample Number Sample Media Units Analyte Reporte d Value Assigne d Value Acceptance Limits Performance Evaluation ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Barium-133 30.1 31.3 19.0 - 43.6 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Cesium-134 31.2 28 16.0 - 40.0 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Cesium-137 52.8 47.7 24.5 - 70.9 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Cobalt-60 96.7 84 66.4 - 102 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Zinc-65 322 284 228 - 340 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Gross Alpha 32.6 35.2 25.7 - 44.7 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Gross Beta 44 55.5 41.1 - 69.9 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Uranium (Nat) 38.9 37.2 32.9 - 41.5 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water
µg/L Uranium (mass) 49.25 54.3 47.9 - 60.7 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Tritium 9790 10300 8350 -
12300 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Strontium-89 47.4 47.8 33.8-61.8 Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Strontium-90 51.3 43.1 36.9 - 49.3 Not Acceptable ERA 1st/2024 02/26/24 RAD-136 Water pCi/
L Iodine-131 16.1 26.3 22.7-29.9 Not Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/
L Radium-226 10.1 13.4 11.1-15.7 Not Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/
L Radium-228 5.58 6.24 4.17-8.31 Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/
L Strontium-90 35.3 37.6 32.0-43.2 Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/
L Strontium-90 31.3 37.6 32.0-43.2 Not Acceptable ERA 2nd/202 4
5/25/2024 RAD-137 Water pCi/
L Iodine-131 20.4 25.1 21.7-28.5 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Barium-133 40 38.2 25.2-51.2 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Cesium-134 14.6 18.9 7.81-30.0 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Cesium-137 66.8 57 32.9-81.1 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Cobalt-60 79.5 76.8 59.9-93.7 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Zinc-65 327 312 253-371 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Gross Alpha 11.4 13 7.94-18.1 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Gross Alpha 11.1 13 7.94-18.2 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Gross Beta 19.7 20.6 13.2-28.0 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Radium-226 17.4 17.2 14.6-19.8 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Radium-228 5.57 4.63 2.88-6.38 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Radium-228 7.61 7.16 4.50-9.18 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Uranium (Nat) 37 36.8 37.5-41.1 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water
µg/L Uranium (mass) 48.1 53.6 47.3-59.9 Acceptable
pg. 32 ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Tritium 7470 7550 5870-9230 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Tritium 7080 7550 5870-9230 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Strontium-89 69.5 64.7 49.0-80.4 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Strontium-89 71.1 64.7 49.0-80.4 Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Strontium-90 16.3 21.9 17.9-25.9 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Strontium-90 16.6 21.9 17.9-25.10 Not Acceptable ERA 3rd/2024 08/24/24 RAD-138 Water pCi/
L Iodine-131 23.5 27.9 24.2-31.6 Not Acceptable ERA 4th/2024 11/20/24 RAD-139 Water pCi/
L Iodine-131 25.8 26.3 22.7-29.0 Acceptable ERA 4th/2024 11/20/24 RAD-139 Water pCi/
L Strontium-90 31.2 35.6 30.2-41.0 Acceptable ERA 4th/2024 11/20/24 RAD-139 Water pCi/
L Strontium-90 33.3 35.6 30.2-41.0 Acceptable TABLE 5 2024 ERA PROGRAM (MRAD) PERFORMANCE EVALUATION RESULTS PT Provide r
Quarter
/ Year Report Closing /
Received Date Sample Numbe r
Sample Media Units Analyte Reporte d Value Assigne d Value Acceptanc e Limits Performance Evaluation ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Actinium-228 1650 1590 1050-2000 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Americium-241 2450 1880 1020-2660 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Bismuth-212 1250 1670 478-2490 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Bismuth-214 856 786 377-1170 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Cesium-134 3530 3500 2390-4180 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Cesium-137 10600 9150 6920-11600 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Cobalt-60 9240 8400 6620-11600 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Lead-212 1870 1650 1150-2090 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Lead-214 1060 851 357-1340 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Manganese-54
<31.1
<555 0.00-555 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Plutonium-238 556 512 255-778 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Plutonium-239 628 545 297-784 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Potassium-40 44000 41800 28800-49900 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Strontium-90 3350 3630 1130-5650 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Thorium-234 6260 4320 1630-7400 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Uranium-234 4990 4360 2040-5710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Uranium-238 5320 4320 2370-5800 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Uranium-Total 10600 8880 4930-11500 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil
µg/kg Uranium (mass) 16000 12900 5820-17400 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Soil pCi/kg Zinc-65 6550 4920 3930-6710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Americium-241 65.6 55 39.3-73.3 Acceptable
pg. 33 ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Cesium-134 262 273 177-335 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Cesium-137 120 106 87.1-139 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Cobalt-60 1210 1120 952-1420 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Iron-55 325 386 141-616 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
<40.1
<35.0 0.00-35.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Plutonium-238 42.9 41.1 31.0-50.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Plutonium-239 57.1 56.1 41.9-67.7 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Strontium-90 143 158 99.9-215 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Uranium-234 11.9 11.6 8.60-13.6 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Uranium-238 11.8 11.5 8.68-13.7 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Uranium-Total 24.7 23.6 17.2-28.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter
µg/Filter Uranium (mass) 35.6 34.4 27.6-40.3 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Zinc-65 86.2 77.2 63.3-118 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Gross Alpha 112 95.9 50.1-158 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Filter pCi/Filte r
Gross Beta 33.7 22.2 13.5-33.5 Not Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Tritium 12000 13100 9870-15900 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Americium-241 156 139 95.4-178 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Cesium-134 402 415 313-456 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Cesium-137 2400 2310 1980-2630 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Cobalt-60 1570 1500 1290-1720 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Iron-55 2060 2480 1460-3610 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Manganese-54
<10.2
<71.0 0.00-71.0 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Plutonium-238 59.9 70.4 42.3-91.2 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Plutonium-239 59.5 76.5 47.3-94.3 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Strontium-90 397 316 228-391 Not Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Uranium-234 171 181 138-207 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Uranium-238 172 179 139-211 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Uranium-Total 353 368 287-420 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water
µg/L Uranium (mass) 517 537 435-609 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Zinc-65 567 503 448-635 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Gross Alpha 144 168 61.3-232 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Water pCi/L Gross Beta 180 175 87.5-241 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Americium-241 1080 1210 749-1710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Cesium-134 1220 1290 856-1720 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Cesium-137 2440 2420 1860-3260 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Cobalt-60 2240 2090 1640-2730 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Curium-244 1600 1750 987-2150 Acceptable
pg. 34 ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Manganese-54
<40.1
<207 0.00-207 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Plutonium-238 3270 3520 2440-4540 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Plutonium-239 245 216 149-273 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Potassium-40 34600 33300 25000-42200 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Strontium-90 1680 2100 1180-2740 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Uranium-234 2160 2190 1540-2790 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Uranium-238 2110 2170 1530-2710 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Uranium-Total 4400 4450 2840-6000 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
µg/kg Uranium (mass) 6330 6490 4980-8040 Acceptable ERA 2nd/202 4
5/21/2024 MRAD
-40 Vegetatio n
pCi/kg Zinc-65 1720 1510 1130-2240 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Actinium-228 1290 1150 759 - 1450 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Americium-241 1650 1110 599-1570 Not Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Bismuth-212 1240 1120 321 - 1670 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Bismuth-214 651 617 296 - 918 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Cesium-134 1800 1810 1240 - 2160 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Cesium-137 1510 1370 1040 - 1730 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Cobalt-60 3750 4000 3150 - 4940 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Lead-212 1470 1160 809 - 1470 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Lead-214 783 652 274 - 1020 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Manganese-54
<32.3
<555
<555 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Plutonium-238 1850 1860 928 - 2830 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Plutonium-239 963 1030 561 - 1480 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Potassium-40 36700 35300 24300 -
42200 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Strontium-90 3190 4730 1470 - 7370 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Thorium-234 3230 2840 1070 - 4860 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-234 2700 2860 1340 - 3750 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-234 3250 2860 1340 - 3750 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-238 2700 2840 1560 - 3810 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-238 2360 2840 1560 - 3810 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-Total 5550 5830 3240 - 7540 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Uranium-Total 5718 5830 3240 - 7540 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil
µg/kg Uranium (mass) 8090 8500 3840 -
11500 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil
µg/kg Uranium (mass) 7060 8500 3840 -
11500 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Soil pCi/kg Zinc-65 2980 2860 2280 - 3900 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Americium-241 2730 2970 1840 - 4190 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Cesium-134 2270 2460 1630 - 3270 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Cesium-137 912 889 683 - 1200 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Cobalt-60 1040 975 765 - 1270 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Curium-244 739 800 451 - 995 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Manganese-54
<36.0
<207
<207 Acceptable
pg. 35 ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Plutonium-238 2760 2750 1900 - 3550 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Plutonium-239 3310 3450 2380 - 4370 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Potassium-40 32100 28500 21400 -
36100 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Strontium-90 1310 1380 778 - 1800 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Uranium-234 853 859 603 - 1100 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Uranium-238 914 852 602 - 1070 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Uranium-Total 1830 1750 1120 - 2360 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation
µg/kg Uranium (mass) 2750 2550 1960 - 3160 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Vegetation pCi/kg Zinc-65 2180 2000 1490 - 2970 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Americium-241 30.6 29.1 20.8 - 38.8 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Cesium-134 571 581 377 - 712 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Cesium-137 912 848 696 - 1110 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Cobalt-60 956 839 713 - 1070 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Iron-55 963 800 292 - 1280 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Manganese-54
<5.51
<35.0
<35.0 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Plutonium-238 22.7 21.5 16.2 - 26.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Plutonium-239 35.6 32.4 24.2 - 39.1 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Strontium-90 111 105 66.4 - 143 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-234 30.5 31.1 23.1 - 36.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-234 34.6 31.1 23.1 - 36.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-238 29.9 30.9 23.3 - 36.9 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-238 28.8 30.9 23.3 - 36.9 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-Total 62 63.4 46.3 - 75.2 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Uranium-Total 64.72 63.4 46.3 - 75.2 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter
µg/Filter Uranium (mass) 89.7 92.5 74.2 - 108 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter
µg/Filter Uranium (mass) 86.2 92.5 74.2 - 108 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Zinc-65 274 239 196 - 365 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Gross Alpha 83.9 72.4 37.8-119 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Filter pCi/Filter Gross Beta 62.4 47.9 29.0 - 72.4 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Americium-241 130 117 80.3 - 150 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Cesium-134 2060 2190 1650 - 2410 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Cesium-137 1570 1550 1330 - 1760 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Cobalt-60 1120 1050 906 - 1200 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Iron-55 1480 1230 723 - 1790 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Manganese-54
<11.3
<71.0
<71.0 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Plutonium-238 63.7 103 61.9 - 133 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Plutonium-239 79 133 82.3 - 164 Not Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Strontium-90 276 277 199 - 342 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-234 168 176 134 - 201 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-234 191 176 134 - 201 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-238 170 174 135 - 205 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-238 153 174 135 - 205 Acceptable
pg. 36 ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-Total 348 358 279 - 408 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Uranium-Total 351 358 279 - 408 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water
µg/L Uranium (mass) 510 522 423 - 592 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water
µg/L Uranium (mass) 458 522 423 - 592 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Zinc-65 556 526 468 - 664 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Gross Alpha 33.9 52.1 19.0 - 71.8 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Gross Beta 51.5 51.7 25.8 - 71.1 Acceptable ERA 4th/2024 11/18/24 MRAD-41 Water pCi/L Tritium 16400 17600 13300 -
21400 Acceptable
pg. 37 FIGURE 1 COBALT-60 PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-75.0
-50.0
-25.0 0.0 25.0 50.0 75.0 100.0
% Bias 2024 Cobalt-60 Performance Evaluation Results and % Bias Series1 Series2 Series3 January 2024-December 2024
pg. 38 FIGURE 2 CESIUM-137 PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-75.0
-50.0
-25.0 0.0 25.0 50.0 75.0 100.0
% Bias January 2024-December 2024 2024 Cesium-137 Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 39 FIGURE 3 TRITIUM PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-75.0
-50.0
-25.0 0.0 25.0 50.0 75.0 100.0
% Bias January 2024-December 2024 2024 Tritium Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 40 FIGURE 4 STRONTIUM-90 PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-50.0 0.0 50.0 100.0
% Bias January 2024 - December 2024 2024 Strontium-90 Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 41 FIGURE 5 GROSS ALPHA PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-50.0 0.0 50.0 100.0
% Bias January 2024 - December 2024 2024 Gross Alpha Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 42 FIGURE 6 GROSS BETA PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-50.0 0.0 50.0 100.0
% Bias January 2024 - December 2024 2024 Gross Beta Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 43 FIGURE 7 IODINE-131 PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-75.0
-50.0
-25.0 0.0 25.0 50.0 75.0 100.0
% Bias January 2024-December 2024 2024 Iodine-131 Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 44 FIGURE 8 AMERICIUM-241 PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-75.0
-50.0
-25.0 0.0 25.0 50.0 75.0 100.0
% Bias January 2024-December 2024 2024 Americium-241 Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 45 FIGURE 9 PLUTONIUM-238 PERFORMANCE EVALUATION RESULTS AND % BIAS
-100.0
-75.0
-50.0
-25.0 0.0 25.0 50.0 75.0 100.0
% Bias January 2024 - December 2024 2024 Plutonium-238 Performance Evaluation Results and % Bias Series1 Series2 Series3
pg. 46 TABLE 6 REMP INTRA-LABORATORY DATA
SUMMARY
BIAS AND PRECISION BY MATRIX 2024 Bias Criteria (+ / -
25%
Precision Criteria (Note
- 1)
WITHIN OUTSIDE WITHIN OUTSIDE CRITERIA CRITERIA CRITERIA CRITERIA LIQUID Tritium 478 1
632 0
0 166 0
FILTER Gross A & B 930 14 643 0
LIQUID Gas Flow Total Strontium 42 0
50 0
DRINKING WATER Gross Alpha Non Vol Beta 160 2
171 0
LIQUID Gross Alpha Non Vol Beta 77 0
199 0
MILK Gamma Spec Liquid RAD A-013 with Ba, La 63 0
196 0
Gamma Iodine-131 18 0
184 0
AIR CHARCOAL Gamma Iodine 131 RAD A-013 596 7
872 0
VEGETATION Gamma Spec Solid RAD A-013 with Iodine 120 6
157 0
FILTER Gamma Spec Filter 64 0
129 0
DRINKING WATER Tritium 71 0
75 0
TISSUE Gamma Spec Solid RAD A-013 65 3
72 0
MILK Gas Flow Total Strontium 23 1
24 0
LIQUID Gamma Spec Liquid RAD A-013 with Ba, La 148 6
368 0
AIR CHARCOAL Carbon-14 (Ascarite/Soda Lime Filter per Liter) 56 0
56 0
LIQUID
pg. 47 Gas Flow Sr 2nd count 29 0
34 1
MILK Gas Flow Sr 2nd count 82 1
95 1
DRINKING WATER Gamma Spec Liquid RAD A-013 with Ba, La 76 0
117 0
LIQUID Gamma Spec Liquid RAD A-013 with Iodine 55 0
194 0
SOLID Gas Flow Sr 2nd count 10 0
18 0
DRINKING WATER Iodine-131 0
0 59 0
Gas Flow Sr 2nd count 7
0 4
0 LIQUID LSC Iron-55 34 0
43 0
SOLID Gamma Spec Solid RAD A-013 18 1
19 0
Gamma Spec Solid RAD A-013 with Iodine 33 3
54 0
TISSUE Gas Flow Sr 2nd count 17 0
19 0
37 0
DRINKING WATER Gamma Iodine-131 48 0
43 0
FILTER Gas Flow Sr 2nd Count 7
0 9
0 DRINKING WATER Gas Flow Total Strontium 44 0
40 0
LSC Iron-55 32 0
23 0
25 0
SOLID Gas Flow Total Strontium 7
0 7
0 VEGETATION Gamma Spec Solid RAD A-013 14 0
14 0
SOLID LSC Iron-55 7
0 7
0 7
0 TISSUE Gas Flow Total Strontium 8
0 8
0 VEGETATION Gas Flow Sr 2nd count 10 0
10 0
TISSUE Gamma Spec Solid RAD A-013 with Iodine 7
1 10 0
pg. 48 LIQUID Gamma Spec Liquid RAD A-013 5
0 5
0 MILK Gamma Spec Liquid RAD A-013 with Iodine 0
0 2
0 FILTER Carbon-14 (Soda Lime) 0 0
10 0
LIQUID Gamma Iodine-131 0
0 3
0 DRINKING WATER Gamma Spec Liquid RAD A-013 with Iodine 0
0 14 0
SOLID Carbon-14 3
0 3
0 FILTER Gamma Iodine 131 RAD A-013 6
0 6
0 SOLID Tritium 2
0 2
0 TOTAL 3541 4935 Note 1: The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC.
The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.
pg. 49 TABLE 7 ALL RADIOLOGICAL INTRA-LABORATORY DATA
SUMMARY
BIAS AND PRECISION BY MATRIX:
2024 Bias Criteria (+ / -
25%
Precision Criteria (Note
- 1)
WITHIN OUTSIDE WITHIN OUTSIDE CRITERIA CRITERIA CRITERIA CRITERIA LIQUID Plutonium 261 1
327 3
FILTER Carbon-14 (Soda Lime) 0 0
12 0
LIQUID ICP-MS Uranium-233, 234 Prep in Liquid 39 0
61 0
SOLID LSC Promethium 147 107 0
121 0
FILTER Alpha Spec Am243 58 4
125 0
SOLID Technetium-99 1270 13 1481 8
FILTER LSC Plutonium 241 Filter per Liter 0
0 80 1
ICP-MS Uranium-235, 236, 238 in Filter 37 0
125 1
TISSUE Alpha Spec Plutonium 64 1
93 0
FILTER Gross A & B (Americium Calibration)
Liquid 206 6
283 0
VEGETATION Gas Flow Strontium 90 88 1
103 0
31 0
FILTER Gas Flow Sr-90 3
0 116 0
MILK Technetium-99 2
0 2
0 FILTER Gas Flow Total Radium 0
1 11 0
LIQUID ICP-MS Technetium-99 in Water 33 0
81 4
FILTER Alpha Spec Polonium 0
0 50 0
MILK Alpha Spec Uranium 2
0 2
0 FILTER
pg. 50 Gross Alpha/Beta 1
1 2
0 TISSUE Gas Flow Total Strontium 8
0 8
0 SOLID Gas Flow Total Radium 8
0 8
0 Alpha Spec Neptunium (pCi/Sample) 36 1
36 0
DRINKING WATER Gas Flow Sr 2nd count 7
0 4
0 LIQUID Iodine-131 9
0 15 2
DRINKING WATER Iodine-131 0
0 33 12 VEGETATION Gas Flow Strontium 90 5
1 4
0 TISSUE Gross Alpha/Beta 5
1 6
0 FILTER LSC Phosphorus-32 2
0 1
1 SOLID Carbon-14 by Pyrolysis 2
0 2
0 LSC Chlorine-36 in Solids 0
0 1
0 DRINKING WATER Gas Flow Strontium 90 1
0 1
0 MILK Alpha Spec Neptunium 2
0 2
0 LIQUID Alpha Spec Plutonium 794 11 981 0
SOLID Alpha Spec Plutonium 1330 14 1439 1
Alpha Spec Am241 Curium 1250 15 1359 0
FILTER Gamma Iodine-129 0
0 196 0
SOLID ICP-MS Uranium-234, 235, 236, 238 Prep in Solid 371 0
383 0
FILTER Tritium 302 0
682 0
MILK Gas Flow Sr 2nd count 82 1
95 1
LIQUID Alpha Spec Radium 226 79 0
52 0
FILTER Gamma Spec Filter 251 14 316 0
Alpha Spec Plutonium 164 8
335 0
Alpha Spec Thorium 4
0 117 0
pg. 51 SOLID Tritium 55 1
62 0
TISSUE Lucas Cell Radium 226 2
0 2
0 FILTER Alpha Spec Radium 226 12 0
39 0
DRINKING WATER Tritium in Drinking Water by EPA 906.0 215 0
217 14 SOLID ICP-MS Uranium-235, 236, 238 in Solid 412 21 390 12 LSC Selenium 79 137 3
170 0
FILTER Gas Flow Sr 2nd Count 20 2
115 0
LSC Iron-55 1
1 18 0
VEGETATION Alpha Spec Plutonium 53 0
40 0
SOLID Gross Alpha Beta Soil Leach 75 0
75 0
LIQUID Gamma Nickel 59 RAD A-022 88 0
107 0
AIR CHARCOAL Carbon-14 (Ascarite/Soda Lime Filter per Liter) 56 0
56 0
FILTER ICP-MS Tc-99 Prep in Filter 0
0 13 0
TISSUE Alpha Spec Uranium 57 2
74 0
FILTER GFC Chlorine-36 in Filters 3
1 29 0
0 8
0 SOLID Technetium-99 34 0
37 0
LIQUID Gas Flow Strontium 89 & 90 11 0
10 3
Alpha Spec Actinium 2
0 2
0 DRINKING WATER Alpha Spec Uranium 10 1
11 0
MILK Carbon-14 12 0
12 0
SOLID Radium 226 + 228 Sum (Result only) 4 0
8 0
TISSUE Gas Flow Total Radium 2
0 2
0 SOLID
pg. 52 ICP-MS Uranium-233, 234 Prep in Liquid 0
0 2
0 ICP-MS Uranium-233, 234 in Liquid 0
0 2
0 FILTER Carbon-14 by Pyrolysis 1
1 2
0 LIQUID Gamma Iodine-131 0
0 3
0 TISSUE Gamma Nickel 59 RAD A-022 1
0 1
0 Gamma Iodine-129 1
0 1
0 Carbon-14 1
0 1
0 DRINKING WATER ICP-MS Uranium-238 Prep in Liquid 1
0 1
0 FILTER Alphaspec Pu Filter per Liter 12 0
97 0
SOLID Alpha Spec Thorium 1697 99 1852 0
LIQUID Alpha Spec Am241 Curium 763 5
886 0
AIR CHARCOAL Gamma Spec Filter RAD A-013 70 34 96 0
SOLID Gas Flow Strontium 90 1219 19 1289 0
ICP-MS Uranium-234, 235, 236, 238 in Solid 784 36 770 1
FILTER ICP-MS Uranium-233, 234 Prep in Filter 26 0
101 0
Gross Alpha/Beta 52 1
215 0
LIQUID Alpha Spec Total U RAD A-011 66 1
57 0
SOLID Gamma Nickel 59 RAD A-022 534 9
569 2
DRINKING WATER Gamma Spec Liquid RAD A-013 with Ba, La 76 0
117 0
LIQUID Gamma Spec Liquid RAD A-013 with Iodine 166 27 327 0
LSC, Rapid Strontium 89 and 90 26 1
31 0
51 0
TISSUE Alpha Spec Plutonium 6
0 6
0 FILTER Nickel-63 0
0 46 0
Tritium 243 0
312 0
pg. 53 ICP-MS Uranium-235, 236, 238 Prep in Filter 32 0
110 0
SOLID ICP-MS Uranium-235, 236, 238 Prep in Solid 357 0
366 0
FILTER Alpha Spec Neptunium 175 0
360 0
SOLID Alpha Spec Uranium 92 14 109 2
DRINKING WATER Gamma Spec Drinking Water RAD A-013 80 0
123 37 VEGETATION Alpha Spec Thorium 14 1
15 0
TISSUE Gas Flow Strontium 90 81 1
97 0
Alpha Spec Am241 Curium 38 0
64 0
FILTER Carbon-14 42 0
82 0
Direct Count-Gross Alpha/Beta 471 28 32 0
DRINKING WATER LSC Nickel 63 31 0
25 0
Gas Flow Total Alpha Radium 74 2
75 1
SOLID Alpha Spec Plutonium 32 1
33 0
FILTER Gas Flow Pb-210 0
0 55 0
TISSUE Alpha Spec Neptunium 21 0
19 0
SOLID Alpha Spec Total Uranium 9
4 13 0
VEGETATION Gamma Spec Solid RAD A-013 with Iodine 120 6
157 0
LIQUID Gross Alpha Co-precipitation 5
0 72 1
FILTER LSC Promethium 147 8
0 8
0 Alpha Spec Polonium,(Filter/Liter) 0 0
27 0
GFC Chlorine-36 in Filters PL 0
0 7
0 LIQUID Chlorine-36 in Liquids 22 0
22 0
FILTER Gross Alpha/Beta 0
0 4
0 DRINKING WATER Gamma Iodine-129 6
0 6
0
pg. 54 Gas Flow Strontium 89 & 90 3
0 26 25 LIQUID LSC Phosphorus-32 2
0 2
0 SOLID ICP-MS Technetium-99 Prep in Soil 8
0 4
0 ICP-MS Technetium-99 in Soil 8
0 4
0 Gross Alpha/Beta (Americium Calibration) Solid 11 0
11 0
VEGETATION Alpha Spec Plutonium 0
0 4
0 AIR CHARCOAL Alpha Spec Uranium 1
0 1
0 VEGETATION Alpha Spec Neptunium 6
0 3
0 Alpha Spec Uranium 0
0 1
0 LIQUID Gamma Spec Liquid RAD A-013 1623 30 1708 0
FILTER Alpha Spec Am241Curium 182 6
586 0
Alpha Spec Plutonium 72 0
400 0
Alpha Spec Thorium 115 1
319 0
SOLID Gas Flow Radium 228 318 9
333 0
FILTER Alphaspec Am241 Curium Filter per Liter 2
0 143 0
SOLID Alpha Spec Uranium 1691 155 1874 1
LSC Iron-55 413 0
428 0
Gross Alpha/Beta 1105 69 1258 4
FILTER Gamma Nickel 59 RAD A-022 151 4
289 2
LSC Iron-55 135 1
186 0
SOLID Alpha Spec Plutonium 542 14 583 0
Alpha Spec Neptunium 1132 2
1212 6
LIQUID Alpha/Beta (Americium Calibration)
Drinking Water 65 2
67 0
SOLID Gamma Spec Solid RAD A-013 3745 467 4291 2
FILTER LSC, Rapid Strontium 89 and 90 183 1
231 0
LIQUID ICP-MS Uranium-234, 235, 236, 238 Prep in Liquid 162 0
151 0
pg. 55 ICP-MS Uranium-234, 235, 236, 238 in Liquid 321 0
315 3
FILTER Alpha Spec Californium FPL 0
0 26 0
LIQUID Gamma Iodine-129 380 4
416 0
TISSUE Tritium 57 0
54 0
SOLID Alpha Spec Radium 226 148 3
165 1
ICP-MS Uranium-233, 234 in Solid 325 4
332 0
FILTER Lucas Cell Ra-226 0
0 97 0
62 0
Alpha Spec Uranium 23 0
57 0
SOLID GFC Chlorine-36 in Solids 103 1
124 0
Alpha Spec Am241 (pCi/Sample) 36 0
36 0
Alpha Spec Thorium 32 1
33 0
TISSUE Technetium-99 34 0
34 0
LIQUID Alpha Spec Am243 73 2
113 0
FILTER Technetium-99 0
0 77 0
LIQUID Chlorine-36 in Liquids 24 0
44 0
AIR CHARCOAL Gamma Spec Filter 2
0 2
0 7
0 MILK Gamma Spec Liquid RAD A-013 with Iodine 3
2 7
0 VEGETATION Carbon-14 23 1
25 0
DRINKING WATER ECLS-R-GA NJ 48 Hr Rapid Gross Alpha 49 0
37 0
MILK Tritium 3
0 8
0 Alpha Spec Am241 Curium 2
0 2
0 FILTER Gamma Iodine 131 RAD A-013 6
0 6
0 MILK Gamma Iodine-129 16 0
16 0
SOLID
pg. 56 Gross Alpha/Beta - Direct Count of Puck 0
0 4
0 Tritium by Pyrolysis 7
2 9
0 VEGETATION Gas Flow Total Radium 4
1 5
0 AIR CHARCOAL Technetium-99 0
0 1
0 TISSUE Gas Flow Lead 210 1
0 1
0 1
0 VEGETATION Technetium-99 7
0 4
0 LIQUID Gross Alpha Non Vol Beta 2251 92 3121 4
SOLID Alpha Spec Polonium Solid 41 0
48 0
LIQUID Gas Flow Strontium 90 1163 23 1508 3
VEGETATION Gamma Spec Solid RAD A-013 96 2
83 0
SOLID Tritium 999 12 1185 13 FILTER LSC Plutonium Filter 192 2
364 3
LIQUID Tritium 3318 6
3451 9
Alpha Spec Neptunium 505 2
642 1
AIR CHARCOAL Gamma Iodine 131 RAD A-013 596 7
872 0
LIQUID Gross Alpha Beta (Americium Calibration) Liquid 69 2
226 0
265 2
Gross A & B 1019 19 860 0
LIQUID Gas Flow Sr 2nd count 172 3
345 4
Gas Flow Total Radium 728 21 842 3
Gamma Spec Liquid RAD A-013 with Ba, La 148 6
372 0
FILTER Gamma Iodine 129 62 0
58 0
MILK Gamma Iodine 131 RAD A-013 0
0 105 0
FILTER Gamma Spec Charcoal 42 0
42 0
pg. 57 SOLID Gas Flow Lead 210 231 2
231 0
DRINKING WATER LSC Radon 222 106 1
110 0
TISSUE Alpha Spec Uranium 5
0 5
0 LIQUID Gas Flow Strontium 90 48 0
76 0
VEGETATION Alpha Spec Uranium 75 4
70 0
SOLID Alpha Spec Am243 341 14 377 0
FILTER Lucas Cell Radium-226 0
0 21 0
LIQUID LSC Promethium 147 102 5
112 4
SOLID Alpha Spec Polonium Solid 35 4
39 0
LIQUID Alpha Spec Plutonium 83 6
119 0
MILK Gamma Spec Liquid RAD A-013 11 0
132 0
FILTER Alphaspec Np Filter per Liter 0
0 46 0
DRINKING WATER Gas Flow Total Strontium 44 0
40 0
LIQUID ICP-MS Technetium-99 Prep in Water 34 0
90 0
FILTER Alpha Spec Radium,Filter/Liter 0
0 27 0
LIQUID Lucas Cell Radium-226 28 1
27 0
MILK Alpha Spec Plutonium 2
0 2
0 FILTER Gross Alpha Beta (Flame, Unflame) 0 0
17 0
0 28 0
SOLID Gross Alpha/Beta (Am/Cs Calibration)
Solid 4
0 4
0 LIQUID Pyrolysis Oil Liquid units 1
1 2
0 VEGETATION Gas Flow Lead 210 5
0 5
0 DRINKING WATER
pg. 58 ICP-MS Uranium-238 in Liquid 1
0 1
0 SOLID Gross Alpha Non Vol Beta 1
0 1
0 LSC Phosphorus-32 6
0 6
0 LIQUID Alpha Spec Thorium 614 4
807 0
SOLID Gamma Iodine-129 325 1
447 0
LIQUID LSC Iron-55 234 0
416 0
SOLID Gas Flow Sr 2nd count 86 1
102 1
FILTER ICP-MS Uranium-233, 234 in Filter 26 0
91 0
SOLID Lucas Cell Radium 226 468 20 507 1
Gamma Spec Ra226 RAD A-013 65 5
66 0
FILTER ICP-MS Uranium-234, 235, 236, 238 Prep in Filter 4
0 80 0
DRINKING WATER Gross Alpha Non Vol Beta 756 13 798 37 SOLID Carbon-14 802 12 987 0
LIQUID Gas Flow Lead 210 97 2
136 0
SOLID ICP-MS Uranium-233, 234 Prep in Solid 361 0
369 0
TISSUE Gamma Spec Solid RAD A-013 196 10 214 0
VEGETATION Gross Alpha/Beta 39 2
40 0
DRINKING WATER LSC Iron-55 32 0
23 0
Alpha/Beta (Americium Calibration)
Drinking Water 25 1
26 0
Gamma Iodine-131 48 0
43 0
142 0
SOLID Gas Flow Total Strontium 198 2
228 1
Gamma Spec Solid RAD A-013 with Iodine 33 3
54 0
FILTER Gas Flow Radium 228 5
0 16 0
pg. 59 LIQUID ECLS-R-GA NJ 48 Hr Rapid Gross Alpha 9
0 53 0
DRINKING WATER Iodine-131 0
0 59 0
TISSUE Gamma Spec Solid RAD A-013 with Iodine 7
1 10 0
LIQUID Tritium in Drinking Water by EPA 906.0 30 0
34 4
Alpha Spec Polonium 4
0 4
0 SOLID Gross Alpha Beta (F,U) 14 0
14 0
FILTER Total Activity in Filter, 0
0 6
0 VEGETATION Alpha Spec Am241 (pCi/Sample) 0 0
4 0
DRINKING WATER Alpha Spec Neptunium 2
0 2
0 VEGETATION Alpha Spec Am241 Curium 23 0
24 0
0 2
0 TISSUE Alpha Spec Thorium 5
0 5
0 SOLID ICP-MS Uranium-235, 236, 238 Prep in Liquid 0
0 4
0 FILTER Tritium by Pyrolysis 1
1 2
0 VEGETATION Tritium 5
0 5
0 TISSUE Gas Flow Radium 228 2
0 2
0 LIQUID Alpha Spec Polonium 42 2
44 1
761 10 AIR CHARCOAL Gamma Iodine-129 53 1
54 0
LIQUID Carbon-14 529 3
642 1
ICP-MS Uranium-233, 234 in Liquid 37 0
57 0
ICP-MS Uranium-235, 236, 238 Prep in Liquid 54 0
77 0
ICP-MS Uranium-235, 236, 238 in Liquid 71 0
106 5
pg. 60 FILTER Gas Flow Strontium 90 59 2
350 0
LIQUID Gas Flow Radium 228 1531 59 2015 5
FILTER Gas Flow Lead 210 15 0
36 0
LIQUID Gross Alpha Beta (Flame, Unflame) 696 17 754 0
DRINKING WATER Lucas Cell Radium-226 365 0
386 1
SOLID LSC, Rapid Strontium 89 and 90 147 3
150 0
DRINKING WATER Tritium 79 0
82 0
LIQUID Iodine-131 0
0 170 0
FILTER ICP-MS Uranium-234, 235, 236, 238 in Filter 8
0 145 0
DRINKING WATER Gas Flow Radium 228 410 3
470 26 LIQUID Radium 226 + 228 Sum (Result and TPU only) 35 0
98 0
VEGETATION Tritium 54 0
55 0
FILTER Technetium-99 7
0 462 2
SOLID Gamma Spec Solid RAD A-013 (pCi/Sample) 26 6
32 0
Total Activity, 37 0
37 0
FILTER Gas Flow Ra-228 3
0 55 0
TISSUE ICP-MS Uranium-234, 235, 236, 238 Prep in Solid 2
0 2
0 ICP-MS Uranium-234, 235, 236, 238 in Solid 4
0 4
0 DRINKING WATER Gas Flow Strontium 90 141 0
167 27 SOLID Gas Flow Strontium 90 34 2
36 0
FILTER Gas Flow Total Strontium 10 0
16 0
LIQUID
pg. 61 Gamma Spec Drinking Water RAD A-013 10 0
9 1
Gas Flow Radium 228 33 0
29 1
MILK Gas Flow Total Strontium 23 1
24 0
VEGETATION Gas Flow Sr 2nd count 10 0
10 0
FILTER Filter Prep 10 0
0 0
LIQUID Gamma Spec Solid RAD A-013 6
0 6
0 Gross Alpha/Beta 0
0 4
0 DRINKING WATER Alpha Spec Thorium 4
0 20 0
LIQUID Gamma Iodine 131 RAD A-013 0
0 4
0 1
0 FILTER Alpha Spec Uranium 171 8
447 0
LIQUID Alpha Spec Uranium 1337 99 1697 1
FILTER Alpha Spec U 17 0
205 0
LIQUID Technetium-99 1816 7
1806 2
FILTER Gamma Spec Filter RAD A-013 763 112 1022 0
537 3
Gas Flow Total Strontium 387 11 442 0
Lucas Cell Radium 226 1068 29 1319 1
798 10 MILK Gamma Iodine-131 18 0
184 0
FILTER Carbon-14 15 0
281 0
MILK Gamma Spec Liquid RAD A-013 with Ba, La 63 0
196 0
FILTER Gamma Spec Filter RAD A-013 Direct Count 5
0 25 0
SOLID Tritium 54 0
46 0
pg. 62 LIQUID LSC Calcium 45 27 0
44 0
Gas Flow Total Alpha Radium 32 1
35 0
FILTER ICP-MS Tc-99 in Filter 0
0 9
0 SOLID ICP-MS U-234, 235, 236, 238 Prep per sample 59 0
57 0
TISSUE Gas Flow Sr 2nd count 17 0
19 0
VEGETATION Gamma Iodine-129 14 0
15 0
FILTER Carbon-14 Direct Count 0
0 11 0
LIQUID Total Activity, 13 0
21 0
DRINKING WATER Gamma Spec Liquid RAD A-013 with Iodine 0
0 14 0
Gamma Spec Liquid RAD A-013 6
0 6
0 FILTER Gamma I-131, filter 5
0 5
0 Alpha Spec Plutonium 18 0
18 0
MILK Gas Flow Strontium 90 16 0
22 0
VEGETATION Gamma Spec Solid RAD A-013 (pCi/Sample) 4 0
4 0
LIQUID Direct Tritium 0
0 4
0 VEGETATION Alpha Spec Uranium 0
0 4
0 DRINKING WATER Alpha Spec Am241 Curium 2
0 2
0 Alpha Spec Plutonium 2
0 2
0 SOLID ICP-MS Uranium-235, 236, 238 in Liquid 0
0 1
1 FILTER Gross Alpha Beta (Americium Calibration) Liquid 1
0 0
0 VEGETATION Alpha Spec Plutonium 0
0 1
0 TOTAL 58778 74098 Note 1: The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below
pg. 63 the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.
pg. 64 TABLE 8 2024 CORRECTIVE ACTION REPORT
SUMMARY
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 12/20/2024
- 2. CA Requester: GEL-Quality
- 3. Nonconformance, Audit Finding, Problem, Complaint or Improvement Opportunity
==
Description:==
Unacceptable ratings were obtained for the following parameters associated with this study.
Summary of MAPEP-51 Study Unacceptable Ratings Sample ID Parm Reported Value Reference Value Acceptance Range MAPEP-24-MaW51 Cadmium
-0.00396 NA False Positive MAPEP-24-MaW51 Radium-226 0.475 Bq/L 0.360 Bq/L 0.252 - 0.468 Bq/L Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 241220-1580
- 5. CA
Title:
ISO Documentation of PT failures in MAPEP-50
- 6. Leader Assigned Responsibility for Implementation: Jennie Kill-Bowden and Edmund Frampton
- 7. Team Members: Radiochemistry and Metals analysts
- 8. Proposed Implementation Date:
Immediately
- 9. Director, Quality Systems Approval: Date: 12/20/2024
- 10. Containment Actions, if any:
Following receipt of the PT report, the Quality Department initiated an investigation and formed a Corrective Action (CARR) team with representatives from the affected laboratories.
The team reviewed sample preparation, reagents, calibration records, and conducted analyst interviews.
The findings of the investigation confirmed that the laboratory adhered to all quality control criteria and followed internal procedures and policies as required. These failures were documented and tracked through GELs internal non-conformance system, ensuring a systematic approach to addressing and resolving issues.
2 of 3
- 11. Root Cause(s):
Inorganics (Cd): The industry standard for metals data reporting does not incorporate an associated measurement uncertainty. The interpretation of a negative analytical result utilizes the absolute value of the result compared to the analytes Limit of Quantitation (LOQ). Using this approach, the reported value is not considered excessively negative for reporting purposes.
Radium-226: The data for this analysis has been reviewed and no anomalies were noted.
The review of the sample prep and analysis process did not reveal any gross errors or possible contributors to the result. It is possible that an unknown systematic error must have occurred during the procedure resulting in the high bias.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The laboratory is evaluating the potential use of acceptance criteria for evaluating negative results with the uncertainty for reporting metals analysis for this PT type.
The laboratory evaluated and replaced equipment used in the Ra-226 degassing process.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The laboratory successfully completed the analysis of Cadmium in water in PT study WS-342.
The laboratory successfully completed the analysis of Ra-226 in liquid in PT study RAD-140.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue monitoring the recovery of these parameters to ensure there are no continued issues.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data consistently, assuring clients that GEL can meet acceptance criteria for the PT programs that it participates in. Continuous use of Performance Testing Samples benefits both the lab and its clients by demonstrating ongoing proficiency.
3 of 3
- 16. Preparers Name(s):
Amanda Fehr:
Date: 03/04/2025
- 17. Approval of Leader Responsible for implementation:
Jennie Kill-Bowden:
Date: 3/5/2025 Edmund Frampton:
Date: 3/05/2025 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director of Quality Systems:
Date: 3/10/2025
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 11/18/2024
- 2. CA Requester: GEL-QA
- 3. Nonconformance, Audit Finding, Problem, Complaint, or Improvement Opportunity
==
Description:==
Summary of MRAD-41 Drinking Water Study Unacceptable Ratings Sample ID Parameter Reported Value Reference Value Acceptance Range MRAD Soil Americium-241 1650 pCi/kg 1110 pCi/kg 599-1570 pCi/kg MRAD Water Plutonium-239 79.0 pCi/L 133 pCi/L 82.3-164 pCi/L Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 241118-1574
- 5. CA
Title:
ISO Documentation of PT Failures in RAD-141
- 6. Leader Assigned Responsibility for Implementation: Scott Moreland
- 7. Team Members: Alpha Spec analysts
- 8. Proposed Implementation Date: ASAP
- 9. Director, Quality Systems Approval: Date: 11/18/2024
- 10. Containment Actions, if any:
Following receipt of the Proficiency Testing (PT) report, the Quality Department initiated an investigation and formed a Corrective Action (CARR) team with representatives from the affected laboratories. The team reviewed sample preparation, reagents, calibration records, and conducted analyst interviews.
The findings of the investigation confirmed that the laboratory adhered to all quality control criteria and followed internal procedures and policies as required. These failures were documented and tracked through GELs internal non-conformance system, ensuring a systematic approach to addressing and resolving issues.
- 11. Root Cause(s):
Am-241: The laboratory conducted a review of the data and did not identify any specific errors or anomalies that could identify the performance evaluation failure. The soil sample was reanalyzed for Am and the reanalysis result was within the acceptance range.
Pu-239: The laboratory has reviewed the data and found no errors. All batch QC samples, including an in-batch duplicate, met the acceptance criteria. Due to the Am and U analytes
being isotopically separated from the same aliquot and were within the acceptance limits, a dilution error is not suspected. Since all other matrices analyzed for Pu are well within acceptance limits and utilize the same tracer solution, a tracer issue is also not suspected.
The laboratory reanalyzed the water sample for Pu and the reanalysis is consistent with the originally reported results.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
Due to all quality control samples in the batch being within acceptance criteria, the laboratory will continue to investigate all steps of the analytical process.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The laboratory will continue to monitor the analytical processes of these parameters to ensure that there are no continued issues.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The laboratory will complete additional PT samples as they become available.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data consistently, assuring clients that GEL can meet acceptance criteria for the PT programs that it participates in. Continuous use of Performance Testing Samples benefits both the laboratory and its clients by demonstrating ongoing proficiency.
- 16. Preparers Name(s):
Amanda Fehr Date: 12/23/2024
- 17. Approval of Leader Responsible for implementation:
Scott Moreland Date: 12/23/24 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director, Quality Systems:
Date: 12/23/2024
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 8/26/2024
- 2. CA Requester: GEL-QA
- 3. Nonconformance, Audit Finding, Problem, Complaint, or Improvement Opportunity
==
Description:==
Summary of RAD-138 Drinking Water Study Unacceptable Ratings Sample ID Parameter Reported Value Reference Value Acceptance Range Strontium 89/90 Sr-90 (905.0)
Sr-90 (905.0 Mod) 16.3 pCI/L 16.6 pCI/L 21.9 pCI/L 17.9-25.9 pCI/L Iodine-131 I-131 23.5 pCI/L 27.9 pCI/L 24.2-31.6 pCI/L Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 240826-1563
- 5. CA
Title:
ISO Documentation of PT Failures in RAD-138
- 6. Leader Assigned Responsibility for Implementation: Lois Buist
- 7. Team Members: Gas Flow analysts
- 8. Proposed Implementation Date:
ASAP
- 9. Director, Quality Systems Approval: Date: 8/26/2024
- 10. Containment Actions, if any:
Following receipt of the Proficiency Testing (PT) report, the Quality Department initiated an investigation and formed a Corrective Action (CARR) team with representatives from the affected laboratories. The team reviewed sample preparation, reagents, calibration records, and conducted analyst interviews.
The findings of the investigation confirmed that the laboratory adhered to all quality control criteria and followed internal procedures and policies as required. These failures were documented and tracked through GELs internal non-conformance system, ensuring a systematic approach to addressing and resolving issues.
- 11. Root Cause(s):
Sr-90: The laboratory conducted an in-depth review of all available data and did not identify any specific errors or anomalies that could explain the performance evaluation failure. The instrument calibrations were reviewed for possible significant areas of variance when compared to previous calibrations and none were noted. The Quality department conducted direct observations of the analytical processes noting minor areas of improvement during
precipitations and column separations. A definitive root cause was not isolated during the investigation.
I-131: The laboratory has reviewed the data and found no errors. All batch QC samples, including an in-batch duplicate, met the acceptance criteria. As part of the investigation, the Quality department observed the preparation process. During the review, it was identified that a reagent may have been improperly diluted, potentially contributing to the low bias observed in the results. This procedural discrepancy has been noted as a probable cause requiring corrective action.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The laboratory successfully completed a single-blind spiked sample, achieving results within the acceptance criteria for both Sr-90 and I-131. See below for details:
Single-blind Spiked Sample Results Sample ID Parameter Reported Value Reference Value Recovery Strontium 89/90 Sr-90 (905.0)
Sr-90 (905.0 Mod) 51.2 pCI/L 47.6 pCI/L 48.0 pCI/L 107%
99%
Iodine-131 I-131 33.7 pCI/L 34.4 pCI/L 98%
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The laboratory will continue to monitor the analytical processes of these parameters to ensure that there are no continued issues.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The laboratory will continue to monitor the performance of these methods and complete additional PT samples as they become available.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data consistently, assuring clients that GEL can meet acceptance criteria for the PT programs that it participates in. Continuous use of Performance Testing Samples benefits both the laboratory and its clients by demonstrating ongoing proficiency.
- 16. Preparers Name(s):
Amanda Fehr Date: 11/14/2024
- 17. Approval of Leader Responsible for implementation:
Lois Buist Date: 11/15/2024 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director, Quality Systems:
Date: 11/15/2024
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 8/16/2024
- 2. CA Requester: GEL-QA
- 3. Nonconformance, Audit Finding, Problem, Complaint, or Improvement Opportunity
==
Description:==
Summary of ANA2Q24 Study Unacceptable Ratings Sample ID Parameter Reported Value Reference Value Acceptance Ratio E14182 (milk)
Cerium-141 37.9 pCi/L 28.8 pCi/L 1.32 E14183 (Liquid)
Cerium-141 51.5 pCi/L 37.5 pCi/L 1.37 Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 240816-1561
- 5. CA
Title:
ISO Documentation of PT Failures in RAD-138
- 6. Leader Assigned Responsibility for Implementation: Tim Winters
- 7. Team Members: Gamma Spec analysts
- 8. Proposed Implementation Date:
ASAP
- 9. Director, Quality Systems Approval: Date: 8/16/2024
- 10. Containment Actions, if any:
Following receipt of the PT report, the Quality Department initiated an investigation and formed a Corrective Action (CARR) team with representatives from the affected laboratories. The team reviewed sample preparation, reagents, calibration records, and conducted analyst interviews.
The findings of the investigation confirmed that the laboratory adhered to all quality control criteria and followed internal procedures and policies as required. These failures were documented and tracked through GELs internal non-conformance system, ensuring a systematic approach to addressing and resolving issues.
- 11. Root Cause(s):
The data was reviewed and no errors were found. Historical performance evaluation results do not indicate a high bias for this parameter. It was noted that the PT sample was spiked lower than historical trends, indicating a possible bias in the lower end of the calibration.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
None needed at this time. The laboratory will evaluate the method for areas of potential high bias in the lower end of the calibration range.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The laboratory will complete an additional PT study for this parameter during the 4th quarter of 2024.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue to monitor the recovery of this parameter to ensure that there are no continued issues.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data consistently, assuring clients that GEL can meet acceptance criteria for the PT programs that it participates in. Continuous use of Performance Testing Samples benefits both the lab and its clients by demonstrating ongoing proficiency.
- 16. Preparers Name(s):
Amanda Fehr Date: 11/15/2024
- 17. Approval of Leader Responsible for implementation:
Tim Winters Date: 11/15/24 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director, Quality Systems:
Date: 11/15/2024
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 06/29/2024
- 2. CA Requester: GEL-Quality
- 3. Nonconformance, Audit Finding, Problem, Complaint or Improvement Opportunity
==
Description:==
Unacceptable ratings were obtained for the following parameters associated with this study.
Summary of MAPEP-50 Study Unacceptable Ratings Sample ID Parm Reported Value Reference Value Acceptance Range MAPEP-24-GrF50 Gross alpha 2.77 Bq/sample 1.24 Bq/sample 0.37-2.11 Bq/sample MAPEP-24-MaS50 Iron-55 921 Bq/kg 650 Bq/kg 455-845 Bq/kg MAPEP-24-MaSU50 U-238 U total Am-241 U-234 3.08 ng/L 3.35 ng/L 0.190 Bq/L 0.00257 Bq/L False positive False Positive 0.278 Bq/L False Positive N/A N/A 0.195-0.361 Bq/L N/A MAPEP-24-MaW50 Nickel 0.00618 mg/L False Positive N/A MAPEP-24-MaS50 Antimony Thallium 4.74 mg/kg 1.79 mg/kg 8.4 mg/kg 2.85 mg/kg 5.9-10.9 mg/kg 2.00-3.71 mg/kg Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 240629-1549
- 5. CA
Title:
ISO Documentation of PT failures in MAPEP-50
- 6. Leader Assigned Responsibility for Implementation: Lois Buist, Jennie Kill-Bowden, Greg Ramsay, and Edmund Frampton
- 7. Team Members: Radiochemistry, Bioassay and Metals analysts
- 8. Proposed Implementation Date:
Immediately
- 9. Director, Quality Systems Approval: Date: 06/29/2024
- 10. Containment Actions, if any:
Following receipt of the PT report, the Quality Department initiated an investigation and formed a Corrective Action (CARR) team with representatives from the affected laboratories.
The team reviewed sample preparation, reagents, calibration records, and conducted analyst interviews.
2 of 4 The findings of the investigation confirmed that the laboratory adhered to all quality control criteria and followed internal procedures and policies as required. These failures were documented and tracked through GELs internal non-conformance system, ensuring a systematic approach to addressing and resolving issues.
- 11. Root Cause(s):
MAPEP-24-GrF50 (GA): During the review of the laboratory processes, it was noted that the laboratory had not prepared a MAPEP specific filter calibration with recent media. A new calibration was completed, and the current sample recounted recovering at 94% of the known.
MAPEP-24-MaS50 (Fe-55): The laboratory initially reprepped this sample due to a duplication error. The original analysis result met acceptance criteria. When evaluating the counting process, it was noted that the samples were quenched with the laboratorys standard volume of 30uL of colorant. This analysis is particularly sensitive to over quenching which can contribute to a high bias. The laboratory has evaluated traced backgrounds with less volume of quench colorant to determine an acceptable level for this analysis and calibration.
MAPEP-24-MaSU50 (Urine):
The uranium by ICPMS results were reviewed and confirmed that the blank media was used for blank correction. It was found that the results were less than MDA but did not meet the less than three times the uncertainty criteria for False Positive evaluations.
The Am-241 results were reviewed. It was noted that the reported count was the verification count of the initial result and has a tracer recovery of 116%. The initial count has a tracer recovery of 93% and the result meets acceptance range. The reported result is 85% of the expected value.
The positive detection of U-234 was reviewed. The count room analyst suspects that there was an interference from Neptunium in the spectra. The sample was then sent back to the lab for additional clean-up steps. This process removed a significant amount of the interference. The laboratory is working on this procedure to increase the effectiveness of Np removal during the initial separation to prevent a clean-up being needed.
MAPEP-24-MAaW50 (metals): The known value for Nickel is 1.33 ug/L. which is less than the laboratorys PQL by 6010. All instrument and batch QC were within limits including a duplicate in the analysis batch. Due to the duplicate meeting replication criteria, the laboratory suspects the presence of an unidentified interferant contributing to the false positive.
MAPEP-24-MaS50 (metals): For Antimony, the laboratory reviewed the analysis data and noted that there were no calibration or instrument QC issues. It was also noted that the initial analysis run had results within the acceptance range. This run was not reported due to failing PQL in calibration. The duplicate from the second run was also within range and met replication with the reported sample result.
For Thallium, the reference value was 2.85 mg/kg, just above the laboratorys PQL of 2 mg/kg which can be challenging to interpret due to the uncertainty of method 6010. The
3 of 4 Thallium results by method 6020 were within range and this is the more frequent method of analysis for Thallium.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The laboratory recounted current and previous PT samples in this series to ensure that the new calibrations were effective for the matrices in the PT series. Additionally, results that are less than MDA will be further scrutinized against the TPU for potential false positive results.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The laboratory successfully completed the analysis of Gross Alpha in filters in MRAD-40 which was analyzed in the same time frame as MAPEP-50. The laboratory successfully completed metals analysis in additional PTs SOIL-126 and WS-336. Additional Urine PTs are not available and the laboratory will complete them in the next applicable MAPEP cycle.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue monitoring the recoveries of these parameters across all methods to ensure there are no continued issues.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data consistently, assuring clients that GEL can meet acceptance criteria for the PT programs that it participates in. Continuous use of Performance Testing Samples benefits both the lab and its clients by demonstrating ongoing proficiency.
4 of 4
- 16. Preparers Name(s):
Amanda Fehr:
Date: 09/20/2024
- 17. Approval of Leader Responsible for implementation:
Lois Buist:
Date: 9/20/2024 Jennie Kill-Bowden:
Date: 09/20/2024 Greg Ramsay:
Date: 9/23/2024 Edmund Frampton:
Date: 9/20/2024 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director of Quality Systems:
Date: 09/20/2024
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 5/28/2024
- 2. CA Requester: GEL-QA
- 3. Nonconformance, Audit Finding, Problem, Complaint, or Improvement Opportunity
==
Description:==
Summary of RAD-137 Drinking Water Study Unacceptable Ratings Sample ID Parameter Reported Value Reference Value Acceptance Range Naturals Ra-226 10.1 pCi/L 13.4 pCi/L 11.1-15.7 pCi/L Strontium 89/90 Sr-90 31.3 pCi/L 37.6 pCi/L 32.0-43.2 pCi/L Iodine-131 I-131 20.4 pCi/L 25.1 pCi/L 21.7-28.5 pCi/L Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 240528-1538
- 5. CA
Title:
ISO Documentation of PT Failures in RAD-137
- 6. Leader Assigned Responsibility for Implementation: Lois Buist and Jennie Kill-Bowden
- 7. Team Members: Gas Flow and Liquid Scintillation analysts
- 8. Proposed Implementation Date:
ASAP
- 9. Director, Quality Systems Approval: Date: 5/28/2024
- 10. Containment Actions, if any:
Upon receipt of the PT report, an investigation was initiated by the Quality Department and a Corrective Action (CARR) team assembled. The team consisted of representatives from the affected laboratories. The sample preparation and chemical separation processes were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and spectral data review. The investigation determined that the laboratory met all quality control criteria specified in each method.
- 11. Root Cause(s):
Ra-226: The laboratory has reviewed the data. It was noted that the in batch duplicate result met acceptance criteria for replication and was within the acceptance range of the PT recovering at 87%. In addition, the LCS recovered at 99%. The laboratory suspects sample loss at an indeterminate point in the process due to the acceptable batch QC.
Sr-90: The unacceptable result was analyzed by a modified method of 905.0 and recovered 83% of the known value which is acceptable for the laboratorys LCS. The PT sample was also analyzed by EPA DW method 905.0 and achieved an acceptable result recovering
94% of the assigned value. The RPD between the methods was 12%. The laboratory is evaluating calibration, yield determination, techniques, reagents, carriers, and each step of the process for areas of improvement.
I-131: The laboratory has reviewed the data and no errors were noted. All batch QC samples, including an in-batch duplicate, met acceptance criteria. It was noted that the carrier yields were found to be slightly higher than are typically seen in this method including the reference sample used to calculate the LCS, potentially contributing to the low bias in the result.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The laboratory will continue to evaluate all analytical processes for areas of bias including reagents, carrier and sample transfer processes for Ra-226. The laboratory will securitize carrier yield recoveries that do not fall in the recovery ranges typically seen in the method.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The lab will continue to monitor the recoveries of these parameters to ensure that there are no continued issues. During the analysis time period for RAD-137, the laboratory successfully completed the analysis of Ra-226 and Sr-90 in water in PT study MAPEP-
- 50. In which, the samples were prepared and analyzed by the same processes and procedures.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue to monitor the performance of these methods and complete additional PT samples as they become available.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data at all times and assurances to our clients that GEL can meet acceptance criteria for the PT programs that it participates in. The laboratory and its clients benefit from continuous demonstration of laboratory proficiency using Performance Testing Samples.
- 16. Preparers Name(s):
Amanda Fehr Date: 07/05/2024
- 17. Approval of Leader Responsible for implementation:
Date: 07/05/2024 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director, Quality Systems:
Date: 7/15/2024
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 5/24/2024
- 2. CA Requester: GEL-QA
- 3. Nonconformance, Audit Finding, Problem, Complaint, or Improvement Opportunity
==
Description:==
Summary of MRAD-40 Study Unacceptable Ratings Sample ID Parameter Reported Value Reference Value Acceptance Range MRAD Soil Uranium-234 (by ICP-MS) 6090 pCi/kg 4360 pCi/kg 2040-5710 pCi/kg MRAD Air Filter Uranium-234 Total Uranium (by ICP-MS) 16.7 pCi/F 29.6 pCi/F 11.6 pCi/F 23.6 pCi/F 8.60-13.6 pCi/F 17.2-28.0 pCi/F MRAD Air Filter GAB Gross Beta 33.7 pCi/F 22.2 pCi/F 13.5-33.5 pCi/F MRAD Water Strontium-90 Uranium-234 (by ICP-MS) 397 pCi/L 216 pCi/L 316 pCi/L 181 pCi/L 228-391 pCi/L 138-207 pCi/L Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 240524-1537
- 5. CA
Title:
ISO Documentation of PT Failures in MRAD-40
- 6. Leader Assigned Responsibility for Implementation: Lois Buist and Greg Ramsay
- 7. Team Members: Gas Flow and Rad-ICPMS analysts
- 8. Proposed Implementation Date:
ASAP
- 9. Director, Quality Systems Approval: Date: 5/24/2024
- 10. Containment Actions, if any:
Upon receipt of the PT report, an investigation was initiated by the Quality Department and a Corrective Action (CARR) team assembled. The team consisted of representatives from the affected laboratories. The sample preparation and chemical separation processes were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and data review. The investigation determined that the laboratory met all quality control criteria specified in each method.
- 11. Root Cause(s):
Gross Beta: The laboratory reviewed the data and counting process for this sample and no errors were noted. The filter sample was counted again, and the result was within the acceptance criteria of the PT.
Strontium-90: The laboratory has reviewed the data, and no errors were found. The sample was replicated in the analysis batch and the duplicate result was within the acceptance range for the PT. The duplicate met replication criteria within the batch. A sample of known activity was prepared using the same processes as the PT sample and the result recovered at 102% of the known value. The laboratory reweighed the original sample preparation of the PT sample and recounted to confirm the result. The recount result was within the acceptance range of the PT criteria.
Uranium-234: The laboratory reviewed the data and noted that the LCS recoveries for the batches were > than 100% ranging from 112-118%. The CCV sample associated with each matrix batch met acceptance criteria. The sample preparations were not available for recount.
Each matrix preparation was analyzed on different days utilizing different calibrations. It is suspected that the calibration solution may have introduced bias, and this could not be confirmed due to the solution being consumed.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The laboratory will scrutinize carrier yield and spike recoveries that do not fall in the recovery ranges typically seen in the methods.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The lab will continue to monitor the recoveries of these parameters to ensure that there are no continued issues. During the analysis time period for MRAD-40, the laboratory successfully completed the analysis of Gross Beta in filters and Sr-90 in water in PT study MAPEP-50. In which, the samples were prepared and analyzed by the same processes and procedures.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue to monitor the performance of these methods and complete additional PT samples as they become available.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data at all times and assurances to our clients that GEL can meet acceptance criteria for the PT programs that it participates in. The laboratory and its clients benefit from continuous demonstration of laboratory proficiency using Performance Testing Samples.
- 16. Preparers Name(s):
Amanda Fehr:
Date: 07/05/2024
- 17. Approval of Leader Responsible for implementation:
Lois Buist:
Date: 07/05/2024 Greg Ramsay:
Date: 07/05/2024
Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director, Quality Systems:
Date: 7/5/2024
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 02/29/2024
- 2. CA Requester: GEL-Quality
- 3. Nonconformance, Audit Finding, Problem, Complaint or Improvement Opportunity
==
Description:==
Unacceptable ratings were obtained for the following parameters associated with this study.
Summary of RAD-136 Drinking Water Study Unacceptable Ratings Sample ID Parm Reported Value Reference Value Acceptance Range Naturals Radium-226 10.3 pCi/L 18.2 pCi/L 15.5-20.9 pCi/L Naturals Radium-228 6.74 pCi/L 4.43 pCi/L 2.72-6.14 pCi/L Sr-89/90 Sr-90 (905.0)
Sr-90 (905.0 Mod) 49.8 pCi/L 51.3 pCi/L 43.1 pCi/L 43.1 pCi/L 36.9-49.3 pCi/L 36.9-49.3 pCi/L Iodine Iodine-131 16.1 pCi/L 26.3 pCi/L 22.7-29.9 pCi/L Is this issue potentially 10 CFR Part 21 reportable?
Yes No X
- 4. CARR No. 240229-1517
- 5. CA
Title:
ISO Documentation of PT failures in RAD-136
- 6. Leader Assigned Responsibility for Implementation: Jennie Kill-Bowden and Lois Buist
- 7. Team Members: Gas Flow and Ra-226 analysts
- 8. Proposed Implementation Date: Immediately
- 9. Director, Quality Systems Approval: Date: 2/29/2024
- 10. Containment Actions, if any:
Upon receipt of the PT report, an investigation was initiated by the Quality Department and a Corrective Action (CARR) team assembled. The team consisted of representatives from the affected laboratories. The sample preparation and analytical processes were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and interviews with the analysts.
The investigation determined that the laboratory met all quality control criteria specified in the method. Additionally, all internal procedures and policies were performed as required. These failures were tracked through GELs internal non-conformance system.
2 of 3
- 11. Root Cause(s):
Radium-226: The laboratory reviewed the data of the original analysis, and it was noted that the original preparation of the sample resulted in a value that was within limits. The sample was retransferred to confirm the result. A review of the sample preparation processes, and data set did not reveal any gross errors or possible contributors to the low bias. It is possible that an unknown systematic error must have occurred during the transfer steps of the procedure resulting in the low bias.
Radium-228: The sample was prepared in a batch which included a duplicate sample. The duplicate result was within limits of the study and compared to the sample results with an RPD of 21% and an RER 0.7103. No other issues were noted in the review of the data.
Strontium-90: The Group Leader has reviewed the method to identify the bias. The method LCS trend was reviewed for the method and no anomalies were identified. The calibration used for the analysis was compared to the new calibration performed recently and the original reported data was processed with both calibrations for comparison. Data still maintained a high bias but was within the limits of the study. A sample of known Strontium concentration was analyzed, and the result processed using the new calibration. The result was within the mid-range of the acceptance limits. Instrument run logs were reviewed and there was no indication of possible bias from a previously counted sample.
Iodine-131: The laboratory has reviewed the data and found no errors. All batch QC samples, including a duplicate, met acceptance criteria. The carrier yields were found to be slightly higher than typically seen in this method, possibly contributing to the low bias in the result. The laboratory will continue to investigate all steps of the analytical process.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The laboratory will securitize carrier yield recoveries that do not fall in the recovery ranges typically seen in the method as well as review duplicate results that do not meet RPD requirements of 20% to determine a need for possible reanalysis.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The lab will continue to monitor the recoveries of these parameters to ensure that there are no continued issues.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue to monitor the performance of these methods. In addition, additional PT samples will be analyzed as they become available.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data at all times and assurances to our clients that GEL can meet acceptance criteria for the PT programs that it participates in. The laboratory and its clients benefit from continuous demonstration of laboratory proficiency using Performance Testing Samples.
3 of 3
- 16. Preparers Name(s):
Amanda Fehr Date: 05/31/2024
- 17. Approval of Leader Responsible for implementation:
Jennie Kill-Bowden Date: 06/04/24 Lois Buist Date: 6/3/2024 Supplemental Pages Attached? Yes No X
. Reviewed and Approved by Director, Quality Systems:
Date: 6/7/2024 Jennie Kill-Bowden
CORRECTIVE/PREVENTIVE ACTION REQUEST AND REPORT (CARR)
- 1. Date Requested: 01/10/2024
- 2. CA Requester: GEL-Quality
- 3. Nonconformance, Audit Finding, Problem, Complaint or Improvement Opportunity
==
Description:==
Unacceptable ratings were obtained for the following parameters associated with this study.
Summary of MAPEP-49 Study Unacceptable Ratings Sample ID Parm Reported Value Reference Value Acceptance Range MAPEP-23-GrF49 Gross Alpha 0.463 Bq/S 0.255 Bq/S 0.077-0.434 Bq/S MAPEP-23-MaS49 Th-230 59.5 Bq/kg 41.1 Bq/kg 28.8-53.4 Bq/kg MAPEP-23-MaW49 Sr-90 9.52 Bq/L 7.31 Bq/L 5.12-9.50 Bq/L Is this issue potentially 10 CFR Part 21 reportable? Yes No X
- 4. CARR No. 240110-1509
- 5. CA
Title:
ISO Documentation of PT failures in MAPEP-49
- 6. Leader Assigned Responsibility for Implementation: Lois Buist and Scott Moreland
- 7. Team Members: Gas Flow and Alpha spec analysts
- 8. Proposed Implementation Date:
Immediately
- 9. Director, Quality Systems Approval: Date: 01/10/2024
- 10. Containment Actions, if any:
Upon receipt of the PT report, an investigation was initiated by the Quality Department and a Corrective Action (CARR) team assembled. The team consisted of representatives from the affected laboratories. The sample preparation and analytical processes were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and interviews with the analysts.
The investigation determined that the laboratory met all quality control criteria specified in each method. Additionally, all internal procedures and policies were performed as required. These failures were tracked through GELs internal non-conformance system.
2 of 3
- 11. Root Cause(s):
MAPEP-23-GrF49 (GA): The laboratory has reviewed the data and found that the blank filter media provided with the spiked blank sample was not used for blank correction. When the blank correction was applied the gross alpha result was within the acceptance limits of the study.
MAPEP-23-MaS49 (Th-230): The laboratory has reviewed the data, and no errors were found. The Th analysis batch contained duplicate samples that met RER replication criteria.
Due to the Th-228 and Th-232 reported in this study being within acceptance limits, it is possible that the high bias in the Th-230 result is due to peak tailing from the Th-229 tracer ROI.
MAPEP-23-MaW49 (Sr-90): The data for the Sr-90 analysis was reviewed and no anomalies were noted. The QC in the analysis batch met acceptance criteria. The laboratory evaluated both the prep and instrument processes for possible areas of contamination that contributed to the positive bias. A definitive source was not determined.
- 12. Actions to Prevent Potential Occurrence or Recurrence:
The project set-up has been updated to include instructions to use the blank media for blank correction in the Gross alpha beta filter analysis.
- 13. Implementation of Permanent Corrective/Preventive Actions or Improvements:
The laboratory successfully completed the analysis of Gross Alpha in filters and Strontium-90 in water in MRAD-39 which was analyzed in the same time frame as MAPEP-49. Additional PTs for Th-230 were not available and the laboratory will complete them in the next MAPEP cycle.
- 14. Verify Corrective/preventive Action(s) or Improvement(s):
The lab will continue to monitor the recoveries of these parameters in all methods to ensure that there are no continued issues.
- 15. Lessons Learned. Who can benefit from Lessons Learned?
The Laboratorys objective is to provide accurate data at all times and assurance to our clients that GEL can meet acceptance criteria for the PT programs that it participates in. The laboratory and its clients benefit from continuous demonstration of laboratory proficiency using Performance Testing Samples.
3 of 3
- 16. Preparers Name(s):
Amanda Fehr:
Date: 03/08/2024
- 17. Approval of Leader Responsible for implementation:
Lois Buist:
Date: 03/08/2024 Scott Moreland:
Date: 03/08/2024 Supplemental Pages Attached? Yes No X
- 18. Reviewed and Approved by Director of Quality Systems:
Date: 3/8/2024
TABLE OF CONTENTS Page LIST OF TABLES...........................................................................................................................ii EXECUTIVE
SUMMARY
...............................................................................................................iii I.
INTRODUCTION............................................................................................................... 1 A.
QC Program........................................................................................................... 1 B.
QA Program...........................................................................................................1 II.
PERFORMANCE EVALUATION CRITERIA.....................................................................1 A.
Acceptance Criteria for Internal Evaluations..........................................................1 B.
QC Investigation Criteria and Result Reporting.....................................................3 C.
Reporting of Environmental Dosimetry Results to EDC Customers......................3 III.
DATA
SUMMARY
FOR ISSUANCE PERIOD JANUARY-DECEMBER 2024...................3 A.
General Discussion................................................................................................3 B.
Result Trending......................................................................................................4 IV.
STATUS OF EDC CONDITION REPORTS (CR)..............................................................4 V.
STATUS OF AUDITS/ASSESSMENTS............................................................................4 A.
Internal...................................................................................................................4 B.
External.................................................................................................................. 4 VI.
PROCEDURES AND MANUALS REVISED DURING JANUARY - DECEMBER 2024....4 VII.
CONCLUSION AND RECOMMENDATIONS....................................................................4 VIII.
REFERENCES.................................................................................................................. 4 APPENDIX A DOSIMETRY QUALITY CONTROL TRENDING GRAPHS LIST OF TABLES Page 1.
Percentage of Individual Analyses Which Passed EDC Internal Criteria, January - December 2024 5
2.
Mean Dosimeter Analyses (n=6), January - December 2024 5
3.
Summary of Independent QC Results for 2024 5
-iii-EXECUTIVE
SUMMARY
Routine quality control (QC) testing was performed for dosimeters issued by the Environmental Dosimetry Company (EDC).
During this annual period100% (72/72) of the individual dosimeters, evaluated against the EDC internal performance acceptance criteria (high-energy photons only), met the criterion for accuracy and 100% (72/72) met the criterion for precision (Table 1). In addition, 100% (12/12) of the dosimeter sets evaluated against the internal tolerance limits met EDC acceptance criteria (Table 2) and 100% of independent testing passed the performance criteria (Table 3).
Trending graphs, which evaluate performance statistic for high-energy photon irradiations and co-located stations are given in Appendix A.
One internal assessment was performed in 2024.There were no findings.
1of 6 I.
INTRODUCTION The TLD systems at the Environmental Dosimetry Company (EDC) are calibrated and operated to ensure consistent and accurate evaluation of TLDs. The quality of the dosimetric results reported to EDC clients is ensured by in-house performance testing and independent performance testing by EDC clients, and both internal and client directed program assessments.
The purpose of the dosimetry quality assurance program is to provide performance documentation of the routine processing of EDC dosimeters. Performance testing provides a statistical measure of the bias and precision of dosimetry processing against a reliable standard, which in turn points out any trends or performance changes. Two programs are used:
A.
QC Program Dosimetry quality control tests are performed on EDC Panasonic 814 Environmental dosimeters. These tests include: (1) the in-house testing program coordinated by the EDC QA Officer and (2) independent test perform by EDC clients. In-house test are performed using six pairs of 814 dosimeters, a pair is reported as an individual result and six pairs are reported as the mean result.
Results of these tests are described in this report.
Excluded from this report are instrumentation checks. Although instrumentation checks represent an important aspect of the quality assurance program, they are not included as process checks in this report. Instrumentation checks represent between 5-10% of the TLDs processed.
B.
QA Program An internal assessment of dosimetry activities is conducted annually by the Quality Assurance Officer (Reference 1). The purpose of the assessment is to review procedures, results, materials or components to identify opportunities to improve or enhance processes and/or services.
II.
PERFORMANCE EVALUATION CRITERIA A.
Acceptance Criteria for Internal Evaluations 1.
Bias For each dosimeter tested, the measure of bias is the percent deviation of the reported result relative to the delivered exposure. The percent deviation relative to the delivered exposure is calculated as follows:
where:
=
the corresponding reported exposure for the ith dosimeter (i.e., the reported exposure)
Hi =
the exposure delivered to the ith irradiated dosimeter (i.e., the delivered exposure)
2of 6 2.
Mean Bias For each group of test dosimeters, the mean bias is the average percent deviation of the reported result relative to the delivered exposure. The mean percent deviation relative to the delivered exposure is calculated as follows:
where:
=
the corresponding reported exposure for the ith dosimeter (i.e., the reported exposure)
=
the exposure delivered to the ith irradiated test dosimeter (i.e., the delivered exposure) n =
the number of dosimeters in the test group Precision For a group of test dosimeters irradiated to a given exposure, the measure of precision is the percent deviation of individual results relative to the mean reported exposure. At least two values are required for the determination of precision. The measure of precision for the ith dosimeter is:
where:
= the reported exposure for the ith dosimeter (i.e., the reported exposure)
= the mean reported exposure; i.e.,
n = the number of dosimeters in the test group 3.
EDC Internal Tolerance Limits All evaluation criteria are taken from the EDC Quality System Manual, (Reference 2). These criteria are only applied to individual test dosimeters irradiated with high-energy photons (Cs-137) and are as follows for Panasonic Environmental dosimeters: +/- 15% for bias and +/-
12.8% for precision.
3of 6 B.
QC Investigation Criteria and Result Reporting EDC Quality System Manual (Reference 2) specifies when an investigation is required due to a QC analysis that has failed the EDC bias criteria. The criteria are as follows:
1.
No investigation is necessary when an individual QC result falls outside the QC performance criteria for accuracy.
2.
Investigations are initiated when the mean of a QC processing batch is outside the performance criterion for bias.
C.
Reporting of Environmental Dosimetry Results to EDC Customers 1.
All results are to be reported in a timely fashion.
2.
If the QA Officer determines that an investigation is required for a process, the results shall be issued as normal unless if the QC results prompting the investigation have a mean bias from the known of greater than +/-20%, then the results shall be issued with a note indicating that they may be updated in the future, pending resolution of a QA issue.
3.
Environmental dosimetry results do not require updating if the investigation has shown that the mean bias between the original results and the corrected results, based on applicable correction factors from the investigation, does not exceed +/-15%.
III.
DATA
SUMMARY
FOR ISSUANCE PERIOD JANUARY-DECEMBER 2024 A.
General Discussion Results of performance tests conducted are summarized and discussed in the following sections. Summaries of the performance tests for the reporting period are given in Tables 1 through 3 and Figures 1 through 4.
Table 1 provides a summary of individual dosimeter results evaluated against the EDC internal acceptance criteria for high-energy photons only. During this period100% (72/72) of the individual dosimeters, evaluated against these criteria, met the tolerance limits for accuracy and 100% (72/72) met the criterion for precision. A graphical interpretation is provided in Figures 1 and 2.
Table 2 provides the bias and standard deviation results for each group (N=6) of dosimeters evaluated against the internal tolerance criteria. Overall,100% (12/12) of the dosimeter sets, evaluated against the internal tolerance performance criteria, met these criteria. A graphical interpretation is provided in Figure 3.
Table 3 presents the independent blind spike results for dosimeters processed during this annual period. All results passed the performance acceptance criterion. Figure 4 is a graphical interpretation of Seabrook Station blind co-located station results.
4of 6 B.
Result Trending One of the main benefits of performing quality control tests on a routine basis is to identify trends or performance changes. The results of the Panasonic environmental dosimeter performance tests are presented in Appendix A. The results are evaluated against each of the performance criteria listed in Section II, namely: individual dosimeter accuracy, individual dosimeter precision, and mean bias.
All of the results presented in Appendix A are plotted sequentially by processing date.
IV.
STATUS OF EDC CONDITION REPORTS (CR)
No condition reports were issued during this annual period.
V.
STATUS OF AUDITS/ASSESSMENTS 1.
Internal EDC Internal Quality Assurance Assessment was conducted during the fourth quarter 2024. There were no findings identified.
2.
External None.
VI.
PROCEDURES AND MANUALS REVISED DURING JANUARY - DECEMBER 2024 No procedures or manuals were revised in 2024.
VII.
CONCLUSION AND RECOMMENDATIONS The quality control evaluations continue to indicate the dosimetry processing programs at the EDC satisfy the criteria specified in the Quality System Manual. The EDC demonstrated the ability to meet all applicable acceptance criteria.
VIII.
REFERENCES 1.
EDC Quality Control and Audit Assessment Schedule, 2024.
2.
EDC Manual 1, Quality System Manual, Rev. 4, September 28, 2020.
5of 6 TABLE 1 PERCENTAGE OF INDIVIDUAL DOSIMETERS THAT PASSED EDC INTERNAL CRITERIA JANUARY - DECEMBER 2024(1), (2)
Dosimeter Type Number Tested
% Passed Bias Criteria
% Passed Precision Criteria Panasonic Environmental 72 100 100 (1)This table summarizes results of tests conducted by EDC.
(2)Environmental dosimeter results are free in air.
TABLE 2 MEAN DOSIMETER ANALYSES (N=6)
JANUARY - DECEMBER 2024(1), (2)
Process Date Exposure Level Mean Bias %
Standard Deviation %
Tolerance Limit +/-15%
5/05/2024 37
-0.3 2.2 Pass 5/08/2024 51 2.2 1.5 Pass 5/15/2024 83 2.5 2.2 Pass 7/30/2024 27 1.1 1.8 Pass 8/06/2024 63 6.6 1.2 Pass 9/25/2024 95
-3.1 1.8 Pass 10/24/2024 42 4.9 2.6 Pass 10/30/2024 73 6.8 1.6 Pass 11/27/2024 107
-6.7 1.6 Pass 01/20/2025 32 1.9 1.0 Pass 01/26/2025 47 2.8 1.5 Pass 01/29/2025 117 2.6 2.1 Pass (1)This table summarizes results of tests conducted by EDC for TLDs issued in 2024.
(2)Environmental dosimeter results are free in air.
TABLE 3
SUMMARY
OF INDEPENDENT DOSIMETER TESTING JANUARY - DECEMBER 2024(1), (2)
Issuance Period Client Mean Bias %
Standard Deviation %
Pass / Fail 1st Qtr. 2024 Millstone
-.1 0.2 Pass 2nd Qtr.2024 Seabrook 1.7 2.8 Pass 2nd Qtr. 2024 Millstone
-4.3 0.9 Pass 3rd Qtr. 2024 SONGS
-9.7 1.4 Pass 3rd Qtr. 2024 Millstone
-1.4 2.5 Pass 4th Qtr.2024 Millstone 1.5 1.4 Pass 4th Qtr.2024 Seabrook 3.8 1.5 Pass (1)Performance criteria are +/- 15%.
(2)Blind spike irradiations using Cs-137
6of 6 APPENDIX A DOSIMETRY QUALITY CONTROL TRENDING GRAPHS ISSUE PERIOD JANUARY - DECEMBER 2024