DAQ-2024-010433

Rio Tinto Kennecott Utah Copper,LLC
4700 Daybreak Parkway
South Jordan, Utah 84009
Tel: [phone]
Mr. Bryce Bird - Director
Department of Environmental Quality
Division of Air Quality
P.O Box 144820
Salt Lake City, Utah 84114-4820
Attn: Mr. Conner Kijowski
RE: Kennecott Utah Copper, Bingham Canyon Mine
DAQE-AN105710047-21
Quarterly Ambient Data Report – 4th Quarter 2023
Dear Mr. Bird,
In accordance with requirements in Approval Order (AO) DAQE-AN105710047-
21, Condition II.B.4.f, Kennecott Utah Copper LLC is hereby submitting the
Ambient Data Report for the fourth Quarter of 2023
If you have any questions or concerns please contact me or Sean Daly at 801-
204-2563.
Yours sincerely,
Brendan Murphy
General Manager – Minerals
Date
14 February 2024
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SUMMARY OF PM10 AND
METEOROLOGICAL DATA FROM
RIO TINTO KENNECOTT’S
COPPERTON AND HI-COUNTRY
MONITORING STATIONS
FOURTH QUARTER 2023
Rio Tinto Kennecott

Prepared By:

TRINITY CONSULTANTS
4525 Wasatch Blvd.
Suite 200
Salt Lake City, Utah
801-272-3000

January 2024

Project 234501.0019

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TABLE OF CONTENTS
1.0 INTRODUCTION 1-1 
1.1 Monitoring Station Description ................................................................................. 1-1 
1.2 Data Acquisition ........................................................................................................ 1-4 
2.0 DATA SUMMARY 2-1 
2.1 Copperton C3 PM10 and Meteorological Data ........................................................... 2-1 
2.1.1 Copperton C3 PM10 ..................................................................................................... 2-1 
2.1.2 Copperton C3 Wind Speed and Horizontal Wind Direction ............................................. 2-3 
2.1.3 Temperature .............................................................................................................. 2-5 
2.2 Hi-Country PM10 and Meteorological Data ................................................................ 2-5 
2.2.1 Hi-Country PM10 ......................................................................................................... 2-6 
2.2.2 Wind Speed and Horizontal Wind Direction .................................................................. 2-7 
2.2.3 Temperature ............................................................................................................ 2-10 
2.3 Data Recovery......................................................................................................... 2-10 
3.0 QUALITY CONTROL AND QUALITY ASSURANCE 3-1 
3.1 Visual Inspection of Equipment ................................................................................ 3-1 
3.2 Equipment Calibration .............................................................................................. 3-1 
3.3 PM10 Flow Checks ..................................................................................................... 3-1 
3.4 Arithmetic and Geometric Mean ............................................................................... 3-3 
3.5 Statistics for PM10 Checks ......................................................................................... 3-3 
3.6 Quality Assurance Audits .......................................................................................... 3-4 
APPENDIX A: HOURLY WIND DATA FOR FOURTH QUARTER 2023 A 
APPENDIX B: HOURLY TEMPERATURE DATA FOR FOURTH QUARTER 2023 B 
APPENDIX C: EQUIPMENT CALIBRATIONS FOR FOURTH QUARTER 2023 D 
APPENDIX D: PM10 MONTHLY FLOW CHECKS FOR FOURTH QUARTER 2023 E 
APPENDIX E: PERFORMANCE AUDIT REPORT FOURTH QUARTER 2023 F 
List of Figures
Figure 1.1 Location of Rio Tinto Kennecott’s Copperton C3 and Hi-Country Monitoring Stations 1-2 
Figure 1.2 Photograph of Copperton C3 Monitoring Station 1-2 
Figure 1.3 Photograph of Hi-Country Monitoring Station 1-3 
Figure 2.1 Wind Rose for October 2023 – Copperton C3 2-3 
Figure 2.2 Wind Rose for November 2023 – Copperton C3 2-4 
Figure 2.3 Wind Rose for December 2023 – Copperton C3 2-4 
Figure 2.4 Wind Rose for Fourth Quarter (October - December) 2023 – Copperton C3 2-5 
Figure 2.5 Wind Rose for October 2023 – Hi-Country 2-8 
Figure 2.6 Wind Rose for November 2023 - Hi-Country 2-8 
Figure 2.7 Wind Rose for December 2023 – Hi-Country 2-9 
Figure 2.8 Wind Rose for Fourth Quarter (October - December) 2023 – Hi-Country 2-9 

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List of Tables
Table 1-1 Instrumentation at Rio Tinto Kennecott’s Copperton C3 and Hi-Country Monitoring Stations 1-4 
Table 2-1 PM10 Concentration Results for Copperton C3 Monitoring Station in Micrograms per Cubic Meter
Fourth Quarter 2023 2-2 
Table 2-2 High and Second-High 24-Hour PM10 Concentrations – Copperton C3 2-2 
Table 2-3 Summary of Temperature in Degrees Fahrenheit (°F) for Fourth Quarter 2023 – Copperton C3 2-5 
Table 2-4 PM10 Concentration Results for Hi-Country Monitoring Station in Micrograms per Cubic Meter
Fourth Quarter 2023 2-6 
Table 2-5 High and Second-High 24-Hour PM10 Concentrations – Hi-Country 2-7 
Table 2-6 Summary of Temperature in Degrees Fahrenheit (°F) for Fourth Quarter 2023 – Hi- Country 2-10 
Table 2-7 Data Recovery in Percent for Meteorological Parameters for Fourth Quarter 2023 2-10 
Table 2-8 Data Recovery in Percent for PM10 for Fourth Quarter 2023 2-10 
Table 3-1 Fourth Quarter PM10 Monthly Flow Check Results 3-2 
Table 3-2 Arithmetic and Geometric Means – Fourth Quarter 2023 3-3 
Table 3-3 Fourth Quarter 2023 Bias Statistics for PM10 Samplers 3-4 
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1.0 INTRODUCTION
This fourth quarter 2023 data report, prepared for Rio Tinto Kennecott by Trinity Consultants (Trinity),
summarizes the ambient particulate concentration data less than 10 microns in size (PM10) and
meteorological data collected at the Copperton C3 and Hi-Country monitoring stations. Condition
II.B.4.a of Rio Tinto Kennecott’s Bingham Canyon Mine (BCM) Approval Order (AO) requires that two
ambient monitoring stations be operated to measure PM10 until a minimum of 234,000,000 tons per
year (TPY) of material moved from the mine has been achieved. The purpose of the monitoring is to
measure PM10 concentrations in the vicinity of the mine and to maintain compliance with the National
Ambient Air Quality Standards (NAAQS) for 24-hour PM10.
1.1 Monitoring Station Description
PM10 measurements are collected every three days for 24 hours, midnight to midnight, in accordance
with US Environmental Protection Agency’s (EPA’s) three-day sampling schedule at the Copperton C3
and Hi-Country monitoring stations. The Copperton C3 monitoring station is located near the town of
Copperton, Utah. The Hi-Country monitoring station is operated in the vicinity of one of the top five
highest modeled ground level PM10 concentrations.

A meteorological station is installed at the Copperton C3 PM10 station. This station collects continuous
measurements of wind speed, wind direction, temperature, relative humidity, and barometric
pressure. A 10-meter meteorological tower is also installed at the Hi-Country PM10 monitoring station
which collects continuous measurements of wind speed, wind direction, temperature, relative
humidity, and barometric pressure.

The latitude/longitude coordinates and elevations of the Copperton C3 and Hi-Country monitoring sites
are as follows:

Site Latitude
(decimal degrees)
Longitude
(decimal degrees)
Elevation
(feet)
Copperton C3 40.56265° -112.10257° 5,480
Hi-Country 40.50335° -112.10294° 6,003

Figure 1.1 presents a map showing the locations of Rio Tinto Kennecott’s Copperton and Hi-Country
monitoring stations relative to the mine. Photographs of the monitoring stations are presented in
Figures 1.2 and 1.3. The instrumentation that is installed at the Copperton and Hi-Country monitoring
sites is presented in Table 1-1.

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Figure 1.1 Location of Rio Tinto Kennecott’s Copperton C3 and Hi-Country Monitoring
Stations

Figure 1.2 Photograph of Copperton C3 Monitoring Station

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Figure 1.3 Photograph of Hi-Country Monitoring Station

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Table 1-1 Instrumentation at Rio Tinto Kennecott’s Copperton C3 and Hi-Country
Monitoring Stations
Parameter Equipment
Manufacturer
Model
Number Serial Number

Sample
ID
Copperton C3
PM10 Wedding & Associates High Volume Model 600 60058706319 A
PM10 Wedding & Associates High Volume Model 600 60058707319 B
PM10 Wedding & Associates High Volume Model 600 60058716319 C
PM10 Wedding & Associates High Volume Model 600 60058705319 D
PM10 Wedding & Associates High Volume Model 600 60058717319 E
Wind Speed RM Young 05305-AQ 146853 NA
Wind Direction RM Young 05305-AQ 146853 NA
Temperature E+E Elektronic EE181-L 164016000096C7 NA
Data Acquisition Campbell Scientific CR1000x 14370 NA
Hi-Country
PM10 Tisch Environmental Model TE-6070V P8017 A
PM10 Tisch Environmental Model TE-6070V P8018 B
PM10 Tisch Environmental Model TE-6070V P8019 C
PM10 Tisch Environmental Model TE-6070V P8020 D
PM10 Tisch Environmental Model TE-6070V P8021 E
PM10 Tisch Environmental Model TE-6070V P8022 F
PM10 Tisch Environmental Model TE-6070V P8023 G
PM10 Tisch Environmental Model TE-6070V P8024 H
Wind Speed Met One 020C Y4271 NA
Wind Direction Met One 010C W4849 NA
Temperature E+E Elektronic EE181-L 192916000065B5 NA
Data Acquisition Campbell Scientific CR1000x 14844 NA
1.2 Data Acquisition
Campbell Scientific CR1000x data acquisition systems (DAS’s) at each monitoring station are used
record differential pressure readings from each PM10 sampler's transducer as one-minute averages.
Meteorological data are stored in the data logger as five-minute and hourly averages computed from
secondly values.

PM10 filter samples are collected every three days in accordance with US EPA’s sampling schedule.
High volume quartz filters are later processed by Rio Tinto Kennecott’s environmental laboratory to
determine filter weight and PM10 concentrations.

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2.0 DATA SUMMARY
This section of the report summarizes the data results and data recovery for October 1 through
December 31, 2023. Filter data as well as hourly meteorological data for the period are tabulated in
the appendices. These appendix tables display the meteorological hourly average of measurements
recorded in the hour "ending"; that is, the first hour of the day is labeled 01, meaning the hour
beginning at 00:00:01 and ending at 01:00:00 a.m. The second hour is labeled 02, meaning the values
collected from 01:00:01 a.m. to 02:00:00 a.m.
2.1 Copperton C3 PM10 and Meteorological Data

PM10 and meteorological data are collected at the Copperton C3 monitoring station. Summaries of
these data for the fourth quarter 2023 are presented below.
2.1.1 Copperton C3 PM10
Wedding & Associates High Volume Model 600 filter-based samplers are used to measure PM10 at the
Copperton C3 monitoring station. PM10 samples are exposed in accordance with EPA’s three-day
sampling schedule. The 8” x 10” quartz filters required for the samplers are obtained from Rio Tinto
Kennecott’s gravimetric laboratory.

Table 2-1 presents the PM10 concentration results, based on standard temperature and pressure (STP)
conditions, for the fourth quarter 2023 for the Copperton monitoring site. Table 2-2 presents the high
and second-high 24-hour PM10 concentrations for the fourth quarter at Copperton C3.
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Table 2-1 PM10 Concentration Results for Copperton C3 Monitoring Station in Micrograms per
Cubic Meter Fourth Quarter 2023
Sampling
Date
STP
PM10 Conc.
(μg/m3)
Flow
(m3) Comment
10/03/2023 9.2 1429.92
10/06/2023 19.2 1393.92
10/09/2023 12.3 1376.64
10/12/2023 3.2 1419.84
10/15/2023 10.7 1404
10/18/2023 12.2 1409.76
10/21/2023 12.6 1362.24
10/24/2023 VOID Motor failure
10/27/2023 11.0 1415.52
10/30/2023 VOID Motor failure
11/02/2023 VOID Motor failure
11/05/2023 11.5 1396.8
11/08/2023 VOID Negative weight from lab
11/11/2023 4.7 1434.24
11/14/2023 12.7 1389.6
11/17/2023 9.0 1427.04
11/20/2023 8.7 1448.64
11/23/2023 9.0 1428.48
11/26/2023 26.3 1451.52
11/29/2023 12.9 1440
12/02/2023 45.7 1424.16
12/05/2023 11.1 1437.12
12/08/2023 8.3 1434.24
12/11/2023 25.8 1434.24
12/14/2023 19.6 1441.44
12/17/2023 46.8 1451.52
12/20/2023 7.8 1411.2
12/23/2023 10.4 1435.68
12/26/2023 22.1 1455.84
12/29/2023 21.0 1454.4
Table 2-2 High and Second-High 24-Hour PM10 Concentrations – Copperton C3
Number 24-hour Concentration
(μg/m3)
Date of Occurrence
1 46.8 December 17
2 45.7 December 2

There were no ambient PM10 samples greater than 135 ug/m3 and no exceedances of the NAAQS during any
24-hour sampling period during the quarter; thus, no laboratory filter analyses were conducted.
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Meteorological data records from the Copperton C3 meteorological monitoring site include wind speed and
horizontal wind direction measured at 10 meters, ambient temperature, and relative humidity at 10 meters,
and barometric pressure at 1.5 meters.
2.1.2 Copperton C3 Wind Speed and Horizontal Wind Direction
The most frequent (and predominant) winds during the fourth quarter at Copperton C3 were from the west
followed by the west-northwest sector. Reported wind directions represent the directions from which the wind
is blowing.

Wind speed records show there were 1.7 percent calm winds during the fourth quarter 2023. The percentage
of wind speeds that were not calm but were less than or equal to 10.8 meters per second (m/s) or 24.2 miles
per hour (mph) was 98.3 percent for the fourth quarter. There were 0.0 percent of wind records showing
greater than 10.8 m/s during the fourth quarter. The sectors with the highest average wind speed were the
southeast and south-southeast at 2.8 m/s. The maximum wind gust during the quarter was 19.8 m/s which
occurred on December 8 at 06:00.

Figures 2.1 through 2.3 provide diagrams of the joint frequency of occurrence distributions (wind rose) of the
vector wind speed and wind direction by month for October through December 2023. Figure 2.4 presents the
wind rose for the fourth quarter 2023. Summary tables of hourly average wind direction and wind speed by
month for the fourth quarter are presented in Appendix A.
Figure 2.1 Wind Rose for October 2023 – Copperton C3

10%
20%
30%
40%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott C3
October 2023
10-m Level
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Figure 2.2 Wind Rose for November 2023 – Copperton C3

Figure 2.3 Wind Rose for December 2023 – Copperton C3

4%
8%
12%
16%
20%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott C3
November 2023
10-m Level
4%
8%
12%
16%
20%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott C3
December 2023
10-m Level
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Figure 2.4 Wind Rose for Fourth Quarter (October - December) 2023 – Copperton C3

2.1.3 Temperature
Ambient daily mean temperatures during the fourth quarter ranged from a low of 22.0F in December to a
high of 65.4°F in October. The hourly minimum was 18.2F on December 25 at 08:00 and the hourly maximum
was 74.4°F which occurred on October 9 at 15:00. Fourth quarter data are summarized in Table 2-3. Hourly
averages of the temperature data by month for the fourth quarter are presented in Appendix B.
Table 2-3 Summary of Temperature in Degrees Fahrenheit (°F) for Fourth Quarter 2023 –
Copperton C3
Month
Monthly
Mean
(˚F)
Maximum
Daily Mean
(˚F)
Minimum
Daily Mean
(˚F)
Maximum
Hour
(˚F)
Minimum
Hour
(˚F)
October 51.7 65.4 30.0 74.4 25.0
November 40.5 57.3 24.6 64.1 20.5
December 34.9 48.4 22.0 54.3 18.2
Fourth Quarter 2023 42.4 65.4 22.0 74.4 18.2
2.2 Hi-Country PM10 and Meteorological Data
PM10 and meteorological data are collected at the Hi-Country monitoring station. Summaries of these data for
the fourth quarter 2023 are presented below.
5%
10%
15%
20%
25%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott C3
Quarter 4 2023
10-m Level
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2.2.1 Hi-Country PM10
Tisch Environmental Model TE-6070V filter-based samplers are used to measure PM10 at the Hi-Country
monitoring station. PM10 samples are exposed in accordance with EPA’s three-day sampling schedule. The 8”
x 10” quartz filters required for the samplers are obtained from Rio Tinto Kennecott’s gravimetric laboratory.
Table 2-4 presents the PM10 concentration results, based on standard temperature and pressure (STP)
conditions, for the fourth quarter 2023 for the Hi-Country monitoring site. Table 2-5 presents the high and
second-high 24-hour PM10 concentrations for the fourth quarter at Hi-Country.

Table 2-4 PM10 Concentration Results for Hi-Country Monitoring Station in Micrograms per
Cubic Meter Fourth Quarter 2023
Sampling
Date
STP
PM10 Conc.
(μg/m3)
Flow
(m3) Comment
10/03/2023 6.6 1395.36
10/06/2023 15.3 1363.68
10/09/2023 6.7 1333.44
10/12/2023 2.1 1395.36
10/15/2023 9.7 1378.08
10/18/2023 15.4 1356.48
10/21/2023 VOID Motor failure
10/24/2023 VOID Motor failure
10/27/2023 7.1 1402.56
10/30/2023 11.9 1408.32
11/02/2023 11.8 1365.12
11/05/2023 12.5 1365.12
11/08/2023 3.3 1415.52
11/11/2023 6.7 1379.52
11/14/2023 27.4 1376.64
11/17/2023 9.6 1379.52
11/20/2023 5.1 1431.36
11/23/2023 24.6 1375.20
11/26/2023 12.5 1416.96
11/29/2023 36.2 1404.00
12/02/2023 9.2 1408.32
12/05/2023 5.7 1379.52
12/08/2023 33.4 1414.08
12/11/2023 23.6 1396.80
12/14/2023 19.6 1421.28
12/17/2023 26.4 1392.48
12/20/2023 4.7 1366.56
12/23/2023 14.2 1405.44
12/26/2023 24.0 1432.80
12/29/2023 15.9 1386.72
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Table 2-5 High and Second-High 24-Hour PM10 Concentrations – Hi-Country
Number 24-hour Concentration
(μg/m3)
Date of Occurrence
1 36.2 November 29
2 33.4 December 8

There were no ambient PM10 samples greater than 135 ug/m3 and no exceedances of the NAAQS during any
24-hour sampling period during the quarter; thus, no laboratory filter analyses were conducted.

Meteorological data records from the Hi-Country meteorological monitoring site include wind speed and
horizontal wind direction measured at 10 meters, ambient temperature, and relative humidity at 10 meters,
and barometric pressure at 1.5 meters.
2.2.2 Wind Speed and Horizontal Wind Direction
The most frequent (and predominant) winds during the fourth quarter at the Hi-Country monitoring site were
from the southwest. The second most frequent winds were from the south sector. Reported wind directions
represent the directions from which the wind is blowing.

Wind speed records show there were 0.4 percent calm winds durin g the fourth quarter 2023 at the Hi-Country
site. The percentage of wind speeds that were not calm but were less than or equal to 10.8 m/s (24.2 mph)
was 98.8 percent. 0.8 percent of the winds were greater than 10.8 m/s (24.2 mph) during the fourth quarter.
The sector with the highest average wind speed was south at 5.0 m/s. The maximum wind gust during the
quarter was 25.8 m/s which occurred on December 8 at 07:00.

Figures 2.5 through 2.7 provide diagrams of the joint frequency of occurrence distributions (wind rose) of
wind speed and wind direction by month for October through December 2023 at the Hi-Country monitoring
site. Figure 2.8 presents the wind rose for the fourth quarter 2023. Summary tables of hourly average wind
direction and wind speed by month for the fourth quarter are presented in Appendix A.
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Figure 2.5 Wind Rose for October 2023 – Hi-Country

Figure 2.6 Wind Rose for November 2023 - Hi-Country

5%
10%
15%
20%
25%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott Hi-Country
October 2023
10-m Level
4%
8%
12%
16%
20%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott Hi-Country
November 2023
10-m Level
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Figure 2.7 Wind Rose for December 2023 – Hi-Country

Figure 2.8 Wind Rose for Fourth Quarter (October - December) 2023 – Hi-Country

4%
8%
12%
16%
20%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott Hi-Country
December 2023
10-m Level
4%
8%
12%
16%
20%
N
E
S
W
N-E
S-ES-W
N-W
Rio Tinto Kennecott HiCountry
Quarter 4 2023
10-m Level
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2.2.3 Temperature
Ambient daily mean temperatures during the fourth quarter ranged from a low of 21.4F in December to a
high of 65.5°F in October. The hourly minimum was 19.4F which occurred on December 25 at 08:00. The
hourly maximum was 72.4°F which occurred on October 9 at 15:00. Fourth quarter data are summarized in
Table 2-6. Hourly averages of the temperature data by month for the fourth quarter are presented in Appendix
B.
Table 2-6 Summary of Temperature in Degrees Fahrenheit (°F) for Fourth Quarter 2023 – Hi-
Country
Month
Monthly
Mean
(˚F)
Maximum
Daily Mean
(˚F)
Minimum
Daily Mean
(˚F)
Maximum
Hour
(˚F)
Minimum
Hour
(˚F)
October 51.3 65.5 28.5 72.4 22.2
November 40.2 57.0 23.7 62.0 19.5
December 35.6 49.7 21.4 54.1 19.4
Fourth Quarter 2023 42.4 65.5 21.4 72.4 19.4
2.3 Data Recovery
Data recoveries in percent possible for the fourth quarter are provided in Tables 2-7 and 2-8.
Table 2-7 Data Recovery in Percent for Meteorological Parameters for Fourth Quarter 2023
Month

Oct.
(%)

Nov.
(%)

Dec.
(%)
4th Qtr.
2023
(%)

Oct.
(%)

Nov.
(%)

Dec.
(%)
4th Qtr.
2023
(%)
Parameter C3 Hi-Country
Wind Speed 100 98.6 99.6 99.4 100 99.6 100 99.9
Wind Direction 100 98.6 99.6 99.4 100 99.6 100 99.9
Temperature 100 99.7 100 99.9 100 99.7 100 99.9

Table 2-8 Data Recovery in Percent for PM10 for Fourth Quarter 2023
Station

October
(%)

November
(%)

December
(%)
Fourth Quarter
2023
(%)
Copperton C3 80.0 80.0 100 86.7
Hi-Country 80.0 100 100 93.3
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3.0 QUALITY CONTROL AND QUALITY ASSURANCE
The PM10 samples collected at the Rio Tinto Kennecott monitoring stations have been subjected to a series of
quality control procedures to document the validity of the data and increase the integrity of the data sets.
The quality control performed for these data is described in this section.
3.1 Visual Inspection of Equipment
Visual inspection of the samplers is performed when a site technician visits each site to perform filter
exchanges and to check the status of the PM10 monitoring equipment. Abnormal conditions are logged and
reported immediately to the program manager for corrective action.
3.2 Equipment Calibration
PM10 sampler calibrations are performed at installation, when audits indicate the need or when problems are
identified, and every three months. Meteorological sensors are calibrated every six months. Calibration
verifications were conducted on the PM10 samplers at Copperton C3 and Hi-Country on December 15, 2023.
The meteorological sensors at Copperton C3 were calibrated on August 3, 2023; the meteorological sensors
at Hi-Country were calibrated on August 3, 2023. Copies of the field calibration data sheets are presented in
Appendix C.
3.3 PM10 Flow Checks
Field quality control activities include flow rate, temperature, and pressure checks and collection of field
blanks. All PM10 sampler quality control checks and calibrations are performed using a certified flow transfer
standard. The flow provided by the sample pump is audited with an external flow rate transfer standard at
least every three months.
Monthly PM10 flow checks were conducted on the samplers at Copperton and Hi-Country on October 20,
November 22, and December 4, 2023. The measured flow rates of the PM10 samplers should not exceed ±7
percent of the transfer standard flow rate or within ±10 percent of the designed flow rates for the high-
volume samplers. The results of the monthly flow checks are presented in Table 3-1 and in Appendix D
The Copperton sampler “E” was taken out of service after poor performance was documented in October.
The sampler was out of service for November and December 2023, samples were collected on the other four
samplers.
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Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants 3-2
Table 3-1 Fourth Quarter PM10 Monthly Flow Check Results
Month Sampler ID Reference
Standard
(m3/min)
Sampler
Flow
(m3/min)
% Difference
(Transfer
Standard)

% Difference
(Design)
Copperton
October
A 1.1123 1.1098 -0.2 0.7
B 1.1005 1.1141 1.2 -0.1
C 1.1202 1.1094 -1.0 1.7
D 1.1084 1.1140 0.5 0.4
E 1.0702 1.1148 4.2 -3.3
November
A 1.1177 1.0981 -1.8 1.4
B 1.1060 1.1021 -0.3 0.4
C 1.0981 1.0975 -0.1 -0.1
D 1.1119 1.1022 -0.9 0.8
E N/A N/A N/A N/A
December
A 1.1083 1.0917 -1.5 0.3
B 1.1083 1.0992 -0.8 0.5
C 1.1121 1.0994 -1.1 0.8
D 1.1121 1.0962 -1.4 0.9
E N/A N/A N/A N/A
Hi-Country
October
A 1.1117 1.1260 1.3 -0.4
B 1.1016 1.1180 1.5 -1.3
C 1.1117 1.1274 0.9 -0.2
D 1.1117 1.1260 1.3 -0.4
E 1.1117 1.1300 1.6 -0.2
F 1.1016 1.1120 0.9 -1.6
G 1.1117 1.1260 1.3 -0.2
H 1.1117 1.1230 1.0 -0.3
November
A 1.0961 1.1090 1.2 -1.6
B 1.0942 1.1010 0.6 -1.9
C 1.1001 1.1050 0.4 -1.3
D 1.1040 1.1090 0.5 -1.2
E 1.1001 1.1130 1.2 -1.3
F 1.0942 1.0950 0.1 -2.3
G 1.0942 1.1090 1.4 -1.9
H 1.1060 1.1050 -0.1 -0.8
December
A 1.1399 1.1260 -1.2 1.9
B 1.1079 1.0950 -1.2 -0.5
C 1.1268 1.0980 -2.6 1.1
D 1.1098 1.1010 -0.8 -0.4
E 1.0925 1.1070 1.3 -1.9
F 1.1250 1.0880 -3.3 0.8
G 1.1098 1.1030 -0.6 -0.4
H 1.1060 1.0990 -0.6 -0.7
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Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants 3-3
3.4 Arithmetic and Geometric Mean
The arithmetic and geometric mean were calculated using the following formulas,

1) Arithmetic mean - 𝑥̅ ൌ ଵ
௡ ∑𝑋𝑖௡௜ୀଵ
2) Geometric mean - 𝑋௚ തതതത ൌ ሺ𝑋ଵ ൈ 𝑋ଶ ൈ..𝑋௡ ሻ ଵ
௡

Table 3-2 contains the arithmetic and geometric means, in micrograms per cubic meter, by station. PM10
concentrations are corrected to standard temperature and pressure conditions. Invalidated filters were not
used in these calculations.
Table 3-2 Arithmetic and Geometric Means – Fourth Quarter 2023
Station
Arithmetic
Mean
(STD)
Geometric
Mean
(STD)
Copperton 15.5 9.2
Hi-Country 14.3 9.8
3.5 Statistics for PM10 Checks
Calculations for the PM10 data quality assessment were made based 40 CFR 58 Appendix A. The percent
difference is calculated using the following formula:

d YX
X xi
ii
i
100

Where Yi = concentration indicated by the sampler and Xi = the known concentration.

The coefficient of variation upper bound is calculated using the following equation:

CV = ට௡ ൈ∑ௗ೔మି൫∑ௗభ೙೔సభ൯మ೙೔సభ
ଶ௡ሺ௡ିଵሻ ൈ ට ௡ିଵ
௫బ.భ,೙షభమ

Where: X2 0.1,n-1 is the 10th percentile of a chi-squared distribution with n-1 degrees of freedom.

The absolute volume bias upper bound is then calculated using the following equation:
|𝐴𝐵|ൌ𝐴𝐵൅𝑡଴.ଽହ,௡ିଵ
𝐴𝑆
√𝑛
Where: n is the number of flow rate audits being aggregated; t0.95,n-1 is the 95th quantile of a t-distribution
with n-1 degrees of freedom.

The quantity AB is the mean of the absolute values of the di's and is calculated using the following equation:
AB = ଵ
௡ ∑|𝑑௜ |௡௜ୀ଴

AS is the standard deviation of the absolute values if the di's and is calculated using the following equation:
𝐴𝑆 ൌ
ඨ𝑛 ൈ ∑|𝑑ଵ |ଶ െ ൫∑|𝑑௜ |௡௜ୀଵ ൯ଶ௡௜ୀଵ
𝑛ሺ𝑛 െ 1ሻ

DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants 3-4
A summary of the precision, accuracy, and bias statistics for the collocated PM10 is presented in Table 3-3.

Table 3-3 Fourth Quarter 2023 Bias Statistics for PM10 Samplers
Statistics Copperton Hi-Country
Mean Percent Difference -0.246 0.276
AB 1.091 1.105
AS 1.020 0.687
Bias Estimate -1.59 ±1.35
3.6 Quality Assurance Audits
To comply with the monitoring requirements, a performance audit of PM10 samplers is conducted with 30 days
of installation and quarterly. The PM10 samplers at Copperton and Hi-Country were audited on November 1,
2023; the meteorological sensors at each station were audited on November 1, 2023. A copy of the November
1, 2023 audit report is presented in Appendix E.
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Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants
APPENDIX A: HOURLY WIND DATA FOR FOURTH QUARTER 2023

DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3 Page 1
Wind Speed and Direction in mps for October, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13
Day
1 200/05.5 176/02.5 129/00.9 245/03.3 161/04.5 133/04.0 148/04.7 153/04.4 138/07.3 140/07.1 146/07.5 152/07.4 167/05.9
2 198/01.8 238/02.4 281/01.1 123/02.8 138/02.0 168/02.2 238/01.9 042/00.8 324/00.6 192/01.1 126/04.1 318/02.3 091/01.7
3 349/01.5 289/01.9 134/00.7 249/00.8 281/01.1 186/00.5 280/01.1 073/00.9 145/01.4 115/01.9 057/01.7 007/01.7 054/01.3
4 299/00.7 308/00.4 359/00.7 229/00.9 193/00.7 309/00.6 320/00.9 316/00.6 111/01.7 105/02.3 095/01.3 119/01.0 065/01.3
5 281/01.2 288/01.9 280/01.8 279/01.7 287/01.8 278/01.9 264/01.7 238/00.7 071/01.2 089/01.2 076/01.5 056/01.7 069/01.8
6 273/02.5 282/01.4 282/01.9 292/01.7 291/01.2 313/00.7 286/01.4 288/00.2 122/01.1 098/01.2 045/01.8 054/01.6 013/01.4
7 262/02.3 251/01.8 260/02.5 262/02.6 262/02.6 269/02.3 268/02.0 157/01.1 110/01.5 107/02.2 113/01.9 104/01.9 116/02.2
8 271/02.0 264/03.0 264/02.9 261/02.6 263/03.2 271/03.5 263/02.8 129/00.6 121/01.3 106/01.9 104/02.0 112/02.4 100/01.8
9 254/03.7 258/04.0 264/04.2 247/03.1 266/02.7 258/03.5 275/03.6 249/01.6 109/01.7 110/01.8 102/02.4 108/03.5 110/03.7
10 270/01.6 266/01.1 273/00.9 283/01.4 048/01.6 290/01.5 259/01.6 125/00.9 148/04.3 152/06.4 138/07.2 132/07.1 158/06.3
11 299/02.5 308/01.9 258/01.2 312/01.7 318/02.1 323/04.2 330/03.2 339/02.9 016/02.1 031/01.7 066/01.4 123/02.0 289/04.6
12 093/00.6 087/01.0 274/03.5 277/03.4 290/02.3 323/00.9 006/01.8 048/00.9 151/01.8 119/00.8 114/01.1 070/01.3 328/01.3
13 283/01.2 256/01.6 271/01.5 271/01.9 269/02.1 276/02.1 105/00.9 217/01.7 126/03.4 110/03.2 124/04.4 131/05.1 131/04.6
14 260/02.0 249/01.8 238/01.9 243/01.7 257/01.1 244/01.0 285/00.8 276/00.8 137/00.9 162/00.9 189/01.2 126/03.5 122/03.8
15 261/02.9 264/03.1 266/02.7 266/03.4 263/03.0 271/02.3 269/02.5 224/01.7 112/00.9 110/01.9 115/01.6 118/01.7 099/01.7
16 260/03.4 261/03.6 261/03.2 268/02.3 266/02.5 270/02.6 263/03.2 054/01.1 108/01.5 120/01.9 113/01.5 099/01.9 102/02.4
17 260/03.4 265/03.6 271/03.0 271/02.4 272/02.2 273/02.0 268/02.6 270/01.1 106/00.5 132/01.0 115/01.8 092/01.5 048/02.3
18 220/01.6 275/01.8 278/01.8 270/01.3 277/02.0 226/01.5 270/02.2 001/01.2 118/01.3 127/01.4 112/01.7 047/02.2 030/02.8
19 263/02.3 275/01.6 263/02.2 261/02.1 251/02.7 260/03.2 260/02.9 244/01.8 108/01.2 116/01.6 111/02.1 107/01.8 120/02.0
20 265/02.4 265/02.7 264/03.5 261/03.7 262/03.0 280/01.8 263/01.9 252/00.9 137/01.1 124/01.9 113/01.7 090/01.8 119/02.1
21 280/02.1 268/02.5 265/02.4 273/01.8 281/02.4 248/01.9 264/01.5 265/02.3 128/00.9 116/01.2 063/01.7 106/02.2 116/01.9
22 256/02.9 260/03.2 263/03.5 262/03.5 264/03.1 269/02.6 261/02.8 229/01.7 134/01.8 127/03.1 128/05.3 116/05.6 128/05.0
23 185/02.1 176/02.5 210/02.0 252/03.3 271/04.5 333/02.1 280/01.7 272/01.0 242/01.4 125/01.7 054/01.8 088/01.9 054/02.0
24 251/01.2 282/00.7 278/00.7 287/01.2 288/00.8 298/01.0 289/01.8 043/00.9 155/00.9 118/01.2 106/01.5 119/02.4 124/02.0
25 156/04.2 163/05.0 165/04.2 167/05.0 166/05.6 162/04.1 160/03.1 004/01.3 133/04.2 152/05.7 135/07.2 152/07.5 144/07.1
26 177/02.1 155/01.2 091/01.6 113/01.3 287/03.7 327/04.3 008/03.0 024/02.3 334/01.7 299/03.2 297/04.3 295/03.3 283/04.0
27 252/02.0 234/02.7 244/02.3 265/01.8 277/01.5 255/01.2 266/01.1 180/00.7 150/01.0 115/01.5 119/02.1 115/02.1 136/01.7
28 316/01.7 325/02.0 302/01.1 067/00.9 340/00.6 128/00.8 151/00.9 094/00.8 209/01.3 027/03.2 345/03.7 278/06.0 281/06.7
29 305/03.3 355/03.4 355/05.1 345/03.7 332/02.3 321/03.4 353/01.7 010/01.6 135/01.3 061/02.2 025/02.5 039/02.5 030/02.9
30 281/01.7 263/01.9 263/02.1 263/02.0 268/02.1 280/01.5 276/01.4 284/00.9 066/01.3 116/02.2 142/01.7 118/01.7 100/01.5
31 260/01.4 282/01.3 274/01.6 266/02.1 276/01.6 283/01.7 273/01.9 291/00.8 132/01.1 127/01.6 114/02.0 113/02.1 138/01.9
MEAN 260/02.2 263/02.2 265/02.2 264/02.3 272/02.3 272/02.2 274/02.1 286/01.3 124/01.7 116/02.3 104/02.7 100/02.9 098/03.0
MAX 200/05.5 163/05.0 355/05.1 167/05.0 166/05.6 327/04.3 148/04.7 153/04.4 138/07.3 140/07.1 146/07.5 152/07.5 144/07.1
MIN 093/00.6 308/00.4 359/00.7 249/00.8 340/00.6 186/00.5 285/00.8 288/00.2 106/00.5 119/00.8 114/01.1 119/01.0 065/01.3
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3 Page 2
Wind Speed and Direction in mps for October, 2023
Hr Beg 13 14 15 16 17 18 19 20 21 22 23
Hr End 14 15 16 17 18 19 20 21 22 23 24
Day MEAN MAX SPD MIN SPD
1 161/05.8 183/05.4 201/04.4 168/03.2 151/05.1 201/02.2 202/01.3 138/01.5 154/00.6 305/01.2 245/00.8 169/04.0 146/07.5 154/00.6
2 124/01.9 117/02.1 156/00.8 148/01.5 170/00.8 212/00.8 278/00.9 280/01.3 282/01.2 319/00.6 339/00.9 198/01.6 126/04.1 324/00.6
3 071/01.3 023/01.9 049/01.8 049/01.2 119/00.7 156/01.0 146/01.0 269/00.6 315/00.9 296/01.0 284/01.2 037/01.2 115/01.9 186/00.5
4 022/01.6 036/01.6 031/01.6 009/01.5 349/02.0 327/01.6 313/01.3 292/01.3 273/01.6 263/02.0 284/01.6 336/01.3 105/02.3 308/00.4
5 047/02.4 036/02.0 027/02.2 006/02.3 031/01.3 279/00.8 300/01.3 284/01.6 276/01.6 281/02.2 280/02.2 320/01.7 047/02.4 238/00.7
6 044/02.3 089/02.6 042/02.2 016/02.3 350/01.3 297/01.6 270/01.4 269/02.4 262/01.5 264/02.0 276/01.9 317/01.6 089/02.6 288/00.2
7 121/01.9 110/01.8 074/01.6 044/01.8 348/01.2 286/01.5 268/01.9 264/02.4 268/02.2 284/01.9 268/02.2 244/02.0 262/02.6 157/01.1
8 116/01.7 080/01.3 048/01.7 042/01.6 305/01.1 273/01.8 270/02.0 268/02.2 256/03.8 259/03.8 256/03.5 251/02.3 256/03.8 129/00.6
9 108/03.9 103/03.1 109/02.4 143/01.9 268/01.7 272/02.0 269/02.3 268/04.2 277/02.4 278/02.7 285/01.6 237/02.8 264/04.2 285/01.6
10 188/05.3 195/04.3 175/03.9 203/03.5 307/04.8 265/03.2 160/01.8 293/01.2 276/02.3 269/02.3 267/03.1 225/03.2 138/07.2 125/00.9
11 294/05.3 313/03.1 313/02.6 005/02.7 001/03.2 030/02.2 026/00.7 114/00.7 097/01.4 354/01.1 348/02.0 345/02.4 294/05.3 026/00.7
12 351/01.9 098/01.4 118/02.0 096/01.0 120/01.2 204/00.7 027/00.3 105/00.9 316/01.5 347/01.4 314/01.3 049/01.4 274/03.5 027/00.3
13 129/04.7 139/03.1 133/03.0 130/02.4 277/01.2 273/01.9 273/02.2 290/01.7 274/01.6 275/01.1 282/01.2 225/02.4 131/05.1 105/00.9
14 105/02.3 102/01.8 095/02.1 082/01.4 273/01.4 257/02.1 271/01.9 264/03.2 272/02.7 270/02.4 268/02.5 232/01.9 122/03.8 276/00.8
15 112/01.6 077/01.4 059/01.6 055/01.2 281/01.0 281/01.5 281/01.9 279/02.4 272/03.0 262/02.6 259/02.9 256/02.1 266/03.4 112/00.9
16 106/02.5 113/01.9 120/01.5 139/01.4 262/01.1 263/01.9 273/02.1 280/01.6 262/03.0 266/03.0 266/03.3 232/02.3 261/03.6 054/01.1
17 045/01.9 071/02.0 065/01.5 150/01.1 291/01.2 269/01.3 272/02.1 259/01.7 272/01.7 280/01.2 270/01.8 271/01.9 265/03.6 106/00.5
18 023/02.7 054/02.4 061/01.6 033/01.6 319/00.9 290/01.2 279/02.2 269/02.1 267/02.3 270/02.3 262/02.7 301/01.9 030/02.8 319/00.9
19 128/01.9 104/01.2 060/01.2 079/00.8 290/01.5 266/02.5 273/02.0 269/02.1 267/02.4 270/01.6 271/01.8 244/01.9 260/03.2 079/00.8
20 126/01.6 125/01.7 138/01.5 086/00.7 299/00.9 280/02.1 270/02.8 270/02.3 270/01.0 281/02.0 267/01.8 240/01.9 261/03.7 086/00.7
21 121/01.7 111/02.2 053/01.4 059/01.2 280/01.1 261/01.6 279/01.7 271/01.8 275/01.8 271/03.0 262/03.2 260/01.9 262/03.2 128/00.9
22 145/05.1 144/05.5 142/04.2 133/02.8 232/00.9 282/01.1 212/02.2 241/02.4 196/03.6 216/02.5 162/02.6 202/03.2 116/05.6 232/00.9
23 359/01.5 299/02.4 294/02.1 168/02.7 304/02.4 342/02.1 300/01.0 325/00.7 346/02.0 296/01.4 264/01.0 290/02.0 271/04.5 325/00.7
24 041/02.0 031/01.6 007/01.1 110/01.0 267/01.2 270/01.7 273/01.1 285/01.4 272/01.4 221/02.6 209/01.8 274/01.4 221/02.6 282/00.7
25 157/05.5 174/04.8 174/04.7 171/04.1 180/03.7 155/04.5 154/04.1 351/03.0 001/03.1 151/02.6 173/02.3 156/04.4 152/07.5 004/01.3
26 274/03.9 293/04.3 302/02.4 357/02.2 320/01.3 274/01.6 271/01.6 262/02.3 274/01.7 280/01.3 265/01.1 297/02.5 297/04.3 265/01.1
27 104/01.8 060/01.9 047/01.8 024/01.5 340/01.4 327/00.8 277/01.9 288/01.5 274/01.7 279/01.4 298/01.2 262/01.6 234/02.7 180/00.7
28 279/06.5 270/05.9 286/05.3 325/02.4 322/02.6 287/04.6 281/05.3 327/03.8 319/04.4 317/03.4 302/02.7 310/03.2 281/06.7 340/00.6
29 015/03.1 045/03.1 039/03.2 020/02.2 338/01.7 328/01.8 308/01.5 288/01.0 270/02.2 267/01.9 277/01.9 350/02.5 355/05.1 288/01.0
30 072/01.9 051/02.3 030/02.3 011/01.3 328/01.0 310/01.2 294/01.5 287/01.4 271/01.8 264/01.9 263/02.2 296/01.7 030/02.3 284/00.9
31 141/01.6 140/01.6 093/01.4 102/00.7 285/00.7 278/01.6 277/01.2 274/01.8 248/01.0 276/01.2 273/01.1 245/01.5 113/02.1 102/00.7
MEAN 093/02.9 090/02.6 073/02.3 075/01.9 301/01.7 276/01.8 274/01.8 278/01.9 275/02.0 277/02.0 271/02.0 265/02.2
MAX 279/06.5 270/05.9 286/05.3 171/04.1 151/05.1 287/04.6 281/05.3 268/04.2 319/04.4 259/03.8 256/03.5 152/07.5
MIN 071/01.3 104/01.2 156/00.8 102/00.7 285/00.7 204/00.7 027/00.3 269/00.6 154/00.6 319/00.6 245/00.8 288/00.2
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE = 100.0%
MONTHLY MEAN = 265/02.2 MAXIMUM WIND SPEED =07.5 AT 152 DEGREES DATE OF OCCURRENCE = 10/25 AT 1200
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3 Page 1
Wind Speed and Direction in mps for November, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13
Day
1 258/00.7 226/00.9 279/01.5 283/00.9 285/01.9 266/01.4 290/01.0 201/00.5 128/01.0 116/01.8 117/01.9 112/01.4 ---
2 278/01.8 265/01.8 272/02.7 255/02.5 264/02.4 258/02.6 264/01.7 330/00.8 187/00.6 124/02.4 124/02.8 128/03.3 111/04.3
3 101/01.0 219/00.8 291/01.1 344/00.5 308/01.1 285/02.1 299/01.6 247/01.5 160/01.2 170/01.0 109/02.4 077/01.5 114/02.1
4 259/03.2 259/03.1 263/03.2 264/03.1 263/03.3 265/03.7 265/03.1 264/01.6 122/01.1 126/02.3 117/02.0 107/03.0 108/02.9
5 142/03.7 158/02.8 165/03.8 137/02.0 247/01.5 274/01.1 329/01.1 357/02.2 333/02.8 033/01.7 130/02.5 138/01.9 135/01.7
6 173/01.7 169/01.3 247/01.1 354/01.0 326/00.9 103/01.9 181/02.2 161/01.9 153/01.7 147/04.5 156/03.7 141/06.2 150/04.9
7 351/03.8 345/02.8 358/03.3 011/02.7 010/02.3 360/02.2 004/02.0 004/01.9 295/00.8 316/02.1 335/02.3 085/01.8 131/01.7
8 319/02.8 330/02.6 330/02.9 325/02.9 326/02.1 321/02.3 002/02.1 351/02.2 043/02.0 030/02.7 021/03.3 021/03.6 012/03.0
9 309/01.5 287/01.2 280/00.9 277/00.6 252/00.8 270/01.3 272/01.6 270/02.0 126/01.4 132/01.8 096/01.7 055/01.3 061/01.6
10 265/02.2 270/01.8 266/02.2 267/00.9 273/01.1 269/01.1 266/01.6 294/01.3 113/01.3 123/01.6 113/01.5 118/02.6 115/03.0
11 263/02.3 269/02.4 292/01.5 290/00.8 286/01.6 254/01.1 261/02.1 272/01.8 117/01.4 146/00.6 115/01.7 114/02.2 110/02.6
12 270/02.6 263/02.5 265/02.9 266/03.0 265/03.1 267/02.8 264/03.1 252/02.8 143/00.5 134/01.7 132/01.7 116/03.1 110/02.6
13 163/01.8 132/04.2 155/05.8 135/06.1 192/03.7 213/02.9 178/03.5 179/02.8 211/02.1 124/04.2 135/06.1 136/08.0 134/07.0
14 148/03.9 154/03.1 160/02.7 196/03.5 219/03.8 209/04.4 186/02.8 215/03.7 146/03.3 158/04.1 137/06.4 141/07.1 134/06.5
15 193/03.2 177/03.7 195/03.5 171/03.6 182/02.3 071/01.7 250/01.7 164/03.8 141/04.3 143/04.7 135/06.1 122/06.9 134/07.7
16 206/02.9 158/04.8 165/04.2 137/03.7 156/03.6 008/03.0 290/03.3 186/01.3 302/01.3 081/01.5 062/01.7 171/00.9 087/01.6
17 271/03.5 271/03.3 261/02.5 264/02.5 260/02.3 272/01.0 283/01.1 288/01.3 192/01.1 137/01.6 108/02.4 109/01.8 119/02.2
18 284/00.9 183/02.7 284/00.8 252/02.1 166/01.9 287/01.1 241/03.3 205/03.3 109/01.9 286/01.1 117/03.5 209/01.0 143/01.6
19 317/00.9 196/02.5 159/02.6 150/01.0 209/02.6 155/02.5 190/01.9 324/01.7 304/03.5 293/02.9 161/01.0 139/01.4 345/02.7
20 015/02.4 020/02.2 021/02.2 350/03.4 337/04.9 339/04.4 005/03.1 347/04.4 335/03.2 349/02.9 352/04.1 350/02.3 006/02.0
21 300/01.6 262/01.5 253/01.7 273/02.3 265/02.6 248/01.4 258/01.4 254/01.9 244/01.1 116/02.1 116/01.8 122/01.6 118/01.5
22 216/01.7 272/01.2 328/01.1 345/01.3 295/00.7 287/01.5 273/00.9 282/01.0 144/00.6 172/01.0 126/02.0 133/02.0 144/01.7
23 278/01.4 315/01.1 334/01.0 296/00.5 067/00.8 010/00.8 301/00.8 334/00.6 180/01.1 180/01.5 092/01.7 134/00.6 050/01.5
24 ---------------012/02.0 016/01.8 357/03.1 356/02.8 359/02.0 353/02.1 355/02.3 009/01.7
25 340/02.3 357/02.9 350/03.6 342/02.9 019/01.4 018/01.1 116/00.8 074/00.8 024/01.1 152/02.6 131/02.5 133/01.9 177/02.4
26 078/00.2 128/01.0 229/00.7 300/00.9 319/00.9 258/01.1 240/00.6 254/00.2 235/00.6 032/01.0 158/00.7 118/00.8 064/01.1
27 269/01.8 274/02.1 262/02.0 266/02.0 269/01.9 275/02.2 290/01.5 281/01.4 264/00.9 164/00.7 126/01.8 151/01.3 148/01.4
28 290/00.7 295/00.8 297/01.1 293/01.0 313/01.2 291/00.9 285/00.8 293/01.2 162/00.7 145/00.8 131/02.1 135/01.6 117/02.0
29 324/00.5 290/00.9 276/01.1 269/01.5 282/00.7 313/00.6 273/00.3 293/00.5 055/00.7 128/01.3 121/01.7 128/01.6 120/01.6
30 267/01.0 063/01.0 015/00.8 261/01.4 306/00.8 290/01.2 306/01.2 280/00.8 059/00.5 050/00.4 181/00.5 159/00.8 111/01.3
MEAN 271/02.0 250/02.2 273/02.2 280/02.1 277/02.0 288/01.9 275/01.8 277/01.8 147/01.5 124/02.0 117/02.5 121/02.5 109/02.7
MAX 148/03.9 158/04.8 155/05.8 135/06.1 337/04.9 339/04.4 178/03.5 347/04.4 141/04.3 143/04.7 137/06.4 136/08.0 134/07.7
MIN 078/00.2 219/00.8 229/00.7 344/00.5 295/00.7 313/00.6 273/00.3 254/00.2 059/00.5 050/00.4 181/00.5 134/00.6 064/01.1
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3 Page 2
Wind Speed and Direction in mps for November, 2023
Hr Beg 13 14 15 16 17 18 19 20 21 22 23
Hr End 14 15 16 17 18 19 20 21 22 23 24
Day MEAN MAX SPD MIN SPD
1 ---124/01.9 096/01.8 086/00.9 263/00.9 292/01.4 286/01.4 288/01.3 304/01.1 273/02.0 268/02.0 255/01.3 268/02.0 201/00.5
2 108/03.2 107/02.3 132/01.7 224/01.2 281/01.6 272/02.1 262/02.9 262/02.6 274/01.9 286/01.7 269/01.9 244/02.2 111/04.3 187/00.6
3 110/01.4 118/01.9 085/01.7 014/02.0 303/01.7 261/02.0 265/02.9 278/03.3 268/04.0 257/03.3 261/04.0 260/01.9 261/04.0 344/00.5
4 094/02.1 106/02.8 091/02.1 335/00.7 265/00.9 034/01.1 247/01.1 193/02.1 149/04.4 152/04.3 145/04.3 189/02.6 149/04.4 335/00.7
5 121/01.4 117/01.2 137/01.5 273/01.7 270/02.2 260/03.1 272/02.2 271/01.6 143/02.8 125/03.0 153/01.9 171/02.1 165/03.8 274/01.1
6 193/04.0 222/04.0 169/02.3 140/02.3 163/01.1 158/02.1 225/04.0 271/04.4 307/04.9 359/03.7 357/03.5 177/02.9 141/06.2 326/00.9
7 124/01.7 145/01.9 182/01.5 163/01.8 179/01.0 341/01.1 097/01.2 056/01.5 296/03.4 323/03.1 313/02.7 005/02.1 351/03.8 295/00.8
8 038/03.3 021/02.8 356/02.1 291/03.5 322/02.2 321/01.6 313/02.1 312/01.8 310/01.8 317/02.0 313/02.1 342/02.5 021/03.6 321/01.6
9 051/01.9 045/02.2 041/02.0 023/01.2 282/01.2 275/01.9 267/02.3 265/02.2 270/02.0 275/01.5 265/01.9 296/01.6 267/02.3 277/00.6
10 125/02.1 086/01.3 087/01.6 110/00.7 306/00.8 280/01.6 266/02.1 261/01.3 268/01.4 262/02.6 264/02.7 248/01.7 115/03.0 110/00.7
11 116/02.2 122/02.4 154/01.2 257/01.5 275/01.6 270/02.4 262/02.4 264/03.2 266/03.0 262/02.5 274/01.9 245/01.9 264/03.2 146/00.6
12 122/03.9 136/03.9 148/02.8 263/01.4 284/01.4 266/02.1 281/01.1 243/01.6 235/01.1 149/02.6 136/03.5 218/02.4 122/03.9 143/00.5
13 140/06.2 158/05.1 149/03.6 177/01.7 197/01.0 314/00.9 241/01.1 264/01.5 154/01.4 163/02.4 174/02.9 169/03.6 136/08.0 314/00.9
14 139/05.6 193/02.8 247/02.6 324/01.8 269/02.3 271/01.5 270/02.2 271/01.9 278/01.6 256/02.0 239/03.1 204/03.4 141/07.1 271/01.5
15 133/06.8 124/07.2 135/06.7 137/04.0 163/03.4 155/04.0 233/02.7 194/02.9 171/03.1 152/04.9 214/03.3 161/04.3 134/07.7 071/01.7
16 077/00.9 074/01.4 174/01.0 143/00.7 288/00.9 292/01.7 270/02.5 276/02.4 266/03.3 273/03.0 281/01.5 201/02.2 158/04.8 143/00.7
17 085/01.8 115/01.4 092/01.3 318/00.9 273/00.9 273/01.3 270/01.6 272/01.1 244/00.7 293/00.9 285/00.7 258/01.6 271/03.5 244/00.7
18 062/01.2 143/02.5 058/01.3 130/00.8 256/00.7 288/00.9 208/02.2 206/02.0 172/01.7 283/00.7 288/00.8 215/01.7 117/03.5 256/00.7
19 322/03.3 311/05.2 296/07.8 308/07.4 310/07.0 006/03.1 017/02.5 001/03.6 011/03.6 015/02.6 028/02.2 319/03.1 296/07.8 317/00.9
20 003/01.8 336/02.2 346/02.9 332/02.6 308/02.7 304/02.5 325/02.0 312/03.0 324/02.1 316/02.0 307/01.7 342/02.8 337/04.9 307/01.7
21 060/01.0 100/01.0 066/01.5 018/00.9 288/00.9 272/01.6 250/00.9 285/01.2 284/01.4 270/01.4 239/01.6 260/01.5 265/02.6 250/00.9
22 129/01.7 127/01.6 140/01.2 169/00.3 288/01.3 291/01.3 286/01.7 294/01.1 281/01.1 274/00.8 284/00.9 249/01.2 126/02.0 169/00.3
23 041/01.8 042/01.9 027/01.7 333/01.5 302/01.6 125/01.7 161/01.6 238/01.1 ---------360/01.2 042/01.9 296/00.5
24 015/02.1 017/01.7 013/01.5 001/02.2 351/02.1 342/01.5 357/01.8 348/01.8 353/01.8 015/01.6 009/01.7 002/02.0 357/03.1 013/01.5
25 322/02.5 336/02.4 360/01.9 306/02.6 290/03.4 333/01.1 300/01.1 284/01.2 260/00.9 252/00.5 289/00.5 335/01.8 350/03.6 252/00.5
26 058/01.3 056/01.3 092/01.1 129/01.3 253/00.3 115/00.4 335/00.5 289/01.4 265/01.7 273/01.6 262/01.8 254/00.9 262/01.8 254/00.2
27 145/01.6 136/01.2 133/01.3 177/00.6 300/01.1 289/01.1 277/01.1 284/01.0 288/01.1 286/01.2 293/01.1 251/01.4 275/02.2 177/00.6
28 144/01.7 137/01.7 162/01.1 200/00.4 293/01.3 280/01.5 280/01.2 278/01.2 248/01.4 220/02.6 203/01.2 240/01.3 220/02.6 200/00.4
29 141/01.5 137/01.6 125/01.7 219/00.9 194/00.2 271/00.4 283/00.7 033/00.6 129/00.4 154/01.2 166/01.0 202/01.0 121/01.7 194/00.2
30 074/01.2 137/01.2 208/01.1 208/00.7 247/00.5 163/00.4 199/00.4 272/00.6 292/00.8 309/00.5 295/01.1 256/00.8 261/01.4 050/00.4
MEAN 095/02.5 109/02.4 111/02.1 242/01.7 274/01.6 286/01.6 271/01.8 277/01.9 268/02.1 272/02.1 268/02.1 254/02.0
MAX 133/06.8 124/07.2 296/07.8 308/07.4 310/07.0 155/04.0 225/04.0 271/04.4 307/04.9 152/04.9 145/04.3 136/08.0
MIN 077/00.9 100/01.0 174/01.0 169/00.3 194/00.2 271/00.4 199/00.4 272/00.6 129/00.4 252/00.5 289/00.5 254/00.2
POSSIBLE NUMBER OF OBSERVATIONS =720 ACTUAL NUMBER OF OBSERVATIONS =710 DATA RECOVERY RATE = 98.6%
MONTHLY MEAN = 254/02.0 MAXIMUM WIND SPEED =08.0 AT 136 DEGREES DATE OF OCCURRENCE = 11/13 AT 1200
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3 Page 1
Wind Speed and Direction in mps for December, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13
Day
1 280/01.1 248/01.4 023/00.9 024/01.2 330/00.6 237/00.8 264/00.7 119/00.7 220/00.8 118/01.4 126/03.7 132/03.2 132/02.8
2 330/04.3 291/05.1 308/04.4 319/03.9 305/03.3 062/01.5 135/01.6 178/01.1 129/01.4 133/03.5 130/03.9 171/03.2 181/05.0
3 245/04.3 086/02.3 126/02.4 138/00.9 097/00.9 029/00.9 092/00.9 ---------299/00.5 264/00.5 111/00.8
4 322/04.2 097/01.2 283/00.8 278/01.3 257/01.3 280/02.2 278/01.6 263/01.9 275/01.4 261/00.9 127/02.5 148/02.1 131/02.2
5 269/03.0 274/02.3 261/03.2 272/02.8 264/02.0 269/02.6 250/03.0 250/01.5 254/01.3 154/01.3 158/01.8 123/02.7 119/02.4
6 267/02.5 262/01.7 271/01.5 260/01.3 293/01.3 295/01.1 346/01.2 331/01.1 144/04.4 144/06.5 130/07.8 130/07.7 138/06.6
7 216/09.9 184/07.4 212/05.2 257/06.7 259/02.5 272/02.3 287/04.7 279/10.2 277/11.9 280/10.1 287/09.8 290/09.4 286/04.5
8 272/03.1 323/02.3 275/02.8 274/05.1 292/08.8 298/10.6 291/10.2 296/09.2 300/07.3 292/06.5 295/06.2 289/08.5 284/09.7
9 307/01.9 319/01.9 320/01.8 309/02.2 344/02.9 322/01.9 297/01.7 295/01.3 280/01.6 223/01.2 133/01.5 122/01.7 116/02.0
10 273/01.1 276/00.8 238/01.0 260/01.0 253/00.6 177/01.4 057/00.7 355/00.9 358/00.7 049/00.5 050/01.9 092/01.2 129/01.1
11 266/01.2 069/00.9 026/00.6 295/01.7 287/01.0 300/01.1 284/01.1 310/01.3 302/00.8 273/01.0 140/01.1 127/02.1 132/01.7
12 285/01.5 295/01.2 308/00.9 330/00.7 328/00.6 298/00.6 283/01.3 286/00.4 261/00.7 327/00.4 105/00.9 051/01.5 049/02.1
13 298/01.7 306/02.0 312/03.0 310/03.2 313/03.3 314/03.6 309/03.9 322/03.9 336/03.6 342/04.8 006/03.5 017/02.7 029/02.1
14 289/01.5 284/01.6 312/00.8 315/01.4 286/01.4 282/00.9 271/00.6 285/01.4 214/00.8 134/00.9 127/02.1 101/01.9 066/01.7
15 272/01.4 287/01.1 305/01.0 285/01.2 255/00.9 268/01.0 255/01.6 274/01.4 274/01.6 184/00.5 123/02.0 160/01.1 123/01.7
16 293/01.1 298/00.9 291/01.4 259/00.8 280/00.9 283/01.4 271/01.0 299/00.7 330/00.4 189/00.6 151/01.5 126/01.8 124/01.8
17 288/01.2 307/01.1 299/00.9 290/01.4 299/00.8 311/00.8 321/00.8 240/00.4 300/00.9 153/00.8 108/01.3 138/01.5 120/02.2
18 312/00.8 294/01.1 308/01.1 281/01.2 334/00.8 319/00.7 046/00.9 314/00.8 005/01.4 019/00.9 130/01.1 126/02.3 108/02.7
19 165/05.2 189/04.4 180/03.7 127/01.3 173/02.2 160/02.6 304/00.9 266/00.9 324/01.6 264/01.6 229/01.9 137/04.5 142/06.2
20 143/03.3 138/03.4 179/02.1 161/01.2 187/01.0 220/02.2 227/03.1 232/02.9 145/03.0 133/01.9 137/02.6 167/02.1 116/05.6
21 259/03.2 258/02.9 253/00.8 267/00.6 304/00.8 279/01.3 276/01.3 274/01.3 315/00.7 139/00.7 156/02.8 103/03.2 102/02.5
22 277/01.7 265/01.4 263/02.2 258/01.4 299/00.9 240/01.3 232/01.4 250/01.9 194/02.0 139/03.9 121/03.6 123/06.6 129/06.4
23 266/00.8 245/01.0 194/01.8 202/01.0 311/01.0 357/02.4 172/01.9 076/01.2 339/01.5 329/03.0 010/02.8 357/02.9 359/04.1
24 342/03.1 333/03.2 337/03.4 338/03.8 322/03.0 334/02.9 346/03.3 333/02.5 350/02.7 359/02.5 024/02.2 141/02.3 041/02.1
25 264/02.0 262/02.4 261/02.5 259/02.2 254/02.5 260/02.7 291/01.2 272/01.4 275/01.3 149/00.7 133/02.2 126/02.3 045/01.4
26 282/01.4 281/01.1 274/01.4 274/01.5 277/01.5 325/00.9 283/01.5 251/00.9 249/01.7 108/01.1 127/01.9 133/01.4 094/01.6
27 154/01.5 244/00.5 139/00.3 271/00.7 136/00.3 084/00.8 244/00.3 088/00.8 286/00.4 119/00.9 102/01.4 118/02.5 116/02.2
28 337/01.0 283/00.9 283/01.1 197/00.6 281/00.6 307/00.6 024/01.0 293/01.3 282/01.2 182/00.5 134/01.9 111/01.9 132/01.8
29 276/00.9 295/00.9 322/00.7 288/01.2 089/00.8 305/00.8 009/00.8 317/01.3 056/00.9 151/00.7 147/01.2 130/01.4 128/02.2
30 222/02.0 231/01.7 174/01.0 198/01.8 202/02.1 128/02.1 112/01.5 135/01.3 148/02.3 147/02.8 104/01.4 118/02.6 112/02.0
31 289/01.2 267/02.3 327/01.4 289/01.0 257/00.5 320/01.2 287/00.7 264/01.4 236/01.3 108/01.4 120/02.0 127/01.9 127/02.0
MEAN 276/02.4 276/02.0 280/01.8 274/01.8 283/01.6 293/01.8 290/01.8 283/01.9 283/02.0 154/02.1 123/02.6 125/02.9 111/03.0
MAX 216/09.9 184/07.4 212/05.2 257/06.7 292/08.8 298/10.6 291/10.2 279/10.2 277/11.9 280/10.1 287/09.8 290/09.4 284/09.7
MIN 312/00.8 244/00.5 139/00.3 197/00.6 136/00.3 298/00.6 244/00.3 240/00.4 330/00.4 327/00.4 299/00.5 264/00.5 111/00.8
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3 Page 2
Wind Speed and Direction in mps for December, 2023
Hr Beg 13 14 15 16 17 18 19 20 21 22 23
Hr End 14 15 16 17 18 19 20 21 22 23 24
Day MEAN MAX SPD MIN SPD
1 113/01.5 068/01.4 116/02.0 138/00.8 161/01.1 177/01.2 129/02.1 134/01.9 112/01.3 336/01.3 352/02.8 130/01.5 126/03.7 330/00.6
2 155/06.1 154/05.2 165/05.0 131/04.2 107/02.2 071/02.1 241/02.9 271/03.6 018/03.3 223/03.2 241/03.1 171/03.5 155/06.1 178/01.1
3 358/00.6 279/00.6 137/00.6 311/00.5 284/00.9 277/01.5 272/00.8 278/00.8 282/00.6 294/01.2 302/02.8 291/01.2 245/04.3 299/00.5
4 147/01.5 110/01.5 194/01.4 279/01.7 268/02.6 282/02.7 266/03.1 269/02.6 273/02.2 272/04.0 267/04.0 256/02.1 322/04.2 283/00.8
5 125/02.3 132/02.2 153/01.5 276/01.7 288/01.6 287/01.9 273/02.3 261/00.9 269/01.9 263/02.6 268/02.6 245/02.1 261/03.2 261/00.9
6 141/07.0 138/05.9 168/02.9 151/02.6 138/01.3 141/03.2 225/05.1 225/04.9 156/04.3 143/05.6 160/05.1 180/03.9 130/07.8 295/01.1
7 032/01.8 094/02.6 136/01.0 278/01.0 276/02.0 266/01.8 265/01.3 270/01.9 267/01.7 272/01.2 223/01.6 263/04.7 277/11.9 278/01.0
8 283/10.5 288/10.4 294/09.8 297/07.7 301/05.9 316/04.8 355/02.5 345/02.2 316/02.4 312/02.0 307/01.6 299/06.2 298/10.6 307/01.6
9 113/01.2 118/01.2 235/01.7 260/01.1 265/01.7 259/02.3 258/02.5 233/02.7 242/02.5 276/01.4 247/01.2 269/01.8 344/02.9 260/01.1
10 135/01.5 095/01.1 151/01.6 175/00.8 218/01.2 063/00.6 295/01.1 070/00.8 254/00.7 163/00.9 283/00.7 173/01.0 050/01.9 049/00.5
11 125/01.7 114/01.8 095/01.2 267/00.9 289/01.5 291/00.9 283/01.2 278/00.8 286/01.4 295/01.0 284/01.0 287/01.2 127/02.1 026/00.6
12 041/01.3 044/01.6 003/01.6 331/01.8 328/02.1 313/02.1 308/02.2 317/02.5 321/02.6 304/02.3 316/02.2 326/01.5 321/02.6 327/00.4
13 034/01.7 038/01.6 035/01.6 290/00.9 296/01.4 278/01.9 279/01.5 275/01.9 281/01.4 301/01.8 328/02.0 323/02.5 342/04.8 290/00.9
14 106/01.8 125/01.3 147/01.2 259/01.0 278/01.4 289/01.2 287/01.5 279/01.7 282/01.1 277/01.2 274/01.1 271/01.3 127/02.1 271/00.6
15 124/01.7 146/01.4 098/01.6 276/00.8 299/00.9 284/01.6 285/01.2 263/00.8 310/00.5 292/01.4 267/00.8 261/01.2 123/02.0 184/00.5
16 122/02.1 120/01.9 126/01.5 153/00.7 305/01.1 283/01.5 268/00.8 281/00.7 298/01.2 281/01.4 263/01.1 263/01.2 122/02.1 330/00.4
17 127/02.0 135/01.8 124/01.3 168/00.7 244/00.7 296/01.1 296/00.9 334/00.6 305/00.6 287/01.0 288/01.1 276/01.1 120/02.2 240/00.4
18 128/02.1 142/01.5 120/02.1 112/01.3 342/01.1 203/01.3 189/01.8 171/02.8 144/03.1 144/01.7 183/01.7 127/01.5 144/03.1 319/00.7
19 145/06.6 134/06.0 144/03.6 191/01.9 157/01.0 154/01.9 187/03.0 179/01.9 233/02.6 210/03.9 187/03.5 182/03.0 145/06.6 266/00.9
20 127/03.9 124/04.1 131/04.0 159/02.5 241/02.6 251/03.1 277/01.7 268/02.2 272/01.6 263/02.5 266/03.3 187/02.7 116/05.6 187/01.0
21 152/01.1 105/01.3 175/01.3 279/00.8 277/00.9 274/01.0 271/01.2 270/01.1 272/01.7 267/02.6 270/01.9 256/01.5 103/03.2 267/00.6
22 134/06.3 133/04.4 122/03.2 342/01.1 281/01.1 290/00.9 321/00.8 291/01.0 310/00.8 288/01.0 267/01.2 251/02.4 123/06.6 321/00.8
23 340/03.2 280/02.9 311/02.6 360/02.6 340/02.4 326/02.7 352/01.8 358/02.3 352/02.3 334/02.6 327/03.1 330/02.2 359/04.1 266/00.8
24 037/02.4 036/02.3 345/02.6 345/02.3 343/02.2 296/01.5 266/01.3 266/02.2 266/02.1 260/01.9 261/02.1 333/02.5 338/03.8 266/01.3
25 073/01.5 063/02.2 044/02.0 055/00.9 290/00.5 303/01.0 290/01.4 284/01.7 280/02.0 281/01.6 281/01.7 283/01.7 260/02.7 290/00.5
26 131/01.6 127/01.2 120/01.2 118/01.5 193/00.7 189/00.5 166/00.6 152/01.2 150/01.4 148/00.9 150/00.9 178/01.2 127/01.9 189/00.5
27 133/01.6 117/01.8 132/01.3 037/01.0 326/00.8 240/01.1 292/00.6 271/01.3 138/01.2 341/00.6 339/00.9 138/01.0 118/02.5 139/00.3
28 089/01.9 055/01.4 119/01.7 221/00.5 283/01.0 293/01.3 192/00.8 273/01.5 292/01.0 289/01.0 292/01.1 271/01.1 089/01.9 182/00.5
29 133/02.0 141/01.4 196/01.1 248/00.8 268/00.6 262/00.9 283/01.4 272/01.8 281/01.0 277/00.7 245/01.2 260/01.1 128/02.2 268/00.6
30 228/01.1 229/01.4 188/02.1 285/00.8 036/00.9 192/01.0 273/00.9 295/01.1 299/00.7 283/01.7 279/01.4 196/01.6 147/02.8 299/00.7
31 134/02.2 134/01.8 127/01.8 228/00.6 287/01.3 284/01.0 278/01.7 288/00.7 343/00.4 292/00.3 275/01.0 266/01.3 267/02.3 292/00.3
MEAN 115/02.7 115/02.5 136/02.2 254/01.5 282/01.5 272/01.7 271/01.7 272/01.8 282/01.7 277/01.8 272/01.9 263/02.0
MAX 283/10.5 288/10.4 294/09.8 297/07.7 301/05.9 316/04.8 225/05.1 225/04.9 156/04.3 143/05.6 160/05.1 277/11.9
MIN 358/00.6 279/00.6 137/00.6 311/00.5 290/00.5 189/00.5 292/00.6 334/00.6 343/00.4 292/00.3 283/00.7 292/00.3
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =741 DATA RECOVERY RATE = 99.6%
MONTHLY MEAN = 263/02.0 MAXIMUM WIND SPEED =11.9 AT 277 DEGREES DATE OF OCCURRENCE = 12/7 AT 900
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
Joint Frequency Distribution for October, 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 1.3 1.6 0.4 0.0 0.0 0.0 3.4 2.0
NNE 11.25 - 33.75 0.5 2.4 0.1 0.0 0.0 0.0 3.1 2.1
NE 33.75 - 56.25 1.1 3.1 0.3 0.0 0.0 0.0 4.4 1.8
ENE 56.25 - 78.75 1.7 1.3 0.0 0.0 0.0 0.0 3.1 1.5
E 78.75 - 101.25 2.2 1.2 0.0 0.0 0.0 0.0 3.4 1.4
ESE 101.25 - 123.75 3.5 6.9 0.9 0.1 0.0 0.0 11.4 1.9
SE 123.75 - 146.25 2.3 2.7 1.6 1.1 0.0 0.0 7.7 2.9
SSE 146.25 - 168.75 1.5 0.8 1.9 1.3 0.0 0.0 5.5 3.6
S 168.75 - 191.25 0.4 0.7 0.7 0.3 0.0 0.0 2.0 3.1
SSW 191.25 - 213.75 0.8 0.7 0.5 0.1 0.0 0.0 2.2 2.3
SW 213.75 - 236.25 0.4 0.9 0.0 0.0 0.0 0.0 1.3 1.8
WSW 236.25 - 258.75 1.5 2.4 1.1 0.0 0.0 0.0 5.0 2.0
W 258.75 - 281.25 5.9 19.9 3.8 0.5 0.0 0.0 30.1 2.2
WNW 281.25 - 303.75 5.1 2.6 1.1 0.4 0.0 0.0 9.1 1.9
NW 303.75 - 326.25 2.4 1.5 0.8 0.0 0.0 0.0 4.7 1.9
NNW 326.25 - 348.75 1.1 1.3 0.7 0.0 0.0 0.0 3.1 2.1
0.5
31.7 50.0 13.8 3.9 0.0 0.0 100.0 2.2
TOTAL NUMBER OF OBSERVATIONS =744
POSSIBLE NUMBER OF OBSERVATIONS =744
DATA RECOVERY =100.0%

Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
Joint Frequency Distribution for November, 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 0.3 3.9 1.4 0.0 0.0 0.0 5.6 2.5
NNE 11.25 - 33.75 1.3 2.4 0.3 0.0 0.0 0.0 3.9 1.9
NE 33.75 - 56.25 0.8 0.8 0.1 0.0 0.0 0.0 1.8 1.7
ENE 56.25 - 78.75 1.8 0.4 0.0 0.0 0.0 0.0 2.3 1.3
E 78.75 - 101.25 1.1 1.4 0.0 0.0 0.0 0.0 2.5 1.5
ESE 101.25 - 123.75 2.0 4.4 0.8 0.3 0.0 0.0 7.5 2.3
SE 123.75 - 146.25 2.7 5.4 1.4 2.0 0.0 0.0 11.4 2.8
SSE 146.25 - 168.75 2.1 2.4 2.4 0.3 0.0 0.0 7.2 2.6
S 168.75 - 191.25 1.7 1.8 0.4 0.0 0.0 0.0 3.9 1.9
SSW 191.25 - 213.75 1.0 1.4 1.0 0.0 0.0 0.0 3.4 2.4
SW 213.75 - 236.25 1.0 0.4 0.7 0.0 0.0 0.0 2.1 2.1
WSW 236.25 - 258.75 2.7 1.5 0.6 0.0 0.0 0.0 4.8 1.7
W 258.75 - 281.25 5.8 10.6 2.3 0.0 0.0 0.0 18.6 2.0
WNW 281.25 - 303.75 9.0 1.8 0.6 0.1 0.0 0.0 11.5 1.4
NW 303.75 - 326.25 1.8 3.4 0.6 0.4 0.0 0.0 6.2 2.3
NNW 326.25 - 348.75 1.8 1.8 0.6 0.0 0.0 0.0 4.2 2.1
3.0
36.9 43.9 13.1 3.1 0.0 0.0 100.0 2.1
TOTAL NUMBER OF OBSERVATIONS =710
POSSIBLE NUMBER OF OBSERVATIONS =720
DATA RECOVERY =98.6%

Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
Joint Frequency Distribution for December, 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 0.7 1.6 0.3 0.0 0.0 0.0 2.6 2.2
NNE 11.25 - 33.75 0.8 0.5 0.1 0.0 0.0 0.0 1.5 1.6
NE 33.75 - 56.25 1.3 1.3 0.0 0.0 0.0 0.0 2.7 1.5
ENE 56.25 - 78.75 0.9 0.5 0.0 0.0 0.0 0.0 1.5 1.3
E 78.75 - 101.25 1.2 0.8 0.0 0.0 0.0 0.0 2.0 1.4
ESE 101.25 - 123.75 2.8 3.4 0.4 0.3 0.0 0.0 6.9 2.0
SE 123.75 - 146.25 3.4 5.4 2.3 1.6 0.0 0.0 12.7 2.7
SSE 146.25 - 168.75 3.0 1.8 0.4 0.4 0.0 0.0 5.5 2.0
S 168.75 - 191.25 1.3 1.3 0.7 0.1 0.0 0.0 3.5 2.2
SSW 191.25 - 213.75 1.1 0.5 0.1 0.1 0.0 0.0 1.9 1.8
SW 213.75 - 236.25 1.3 1.3 0.4 0.0 0.1 0.0 3.2 2.3
WSW 236.25 - 258.75 3.1 1.5 0.4 0.1 0.0 0.0 5.1 1.8
W 258.75 - 281.25 10.4 8.1 0.9 0.0 0.3 0.1 19.8 1.8
WNW 281.25 - 303.75 11.9 1.8 0.4 0.7 1.5 0.0 16.2 2.3
NW 303.75 - 326.25 3.8 2.8 1.3 0.0 0.0 0.0 8.0 1.9
NNW 326.25 - 348.75 2.2 1.9 1.2 0.0 0.0 0.0 5.3 2.1
1.6
49.3 34.7 9.0 3.4 1.9 0.1 100.0 2.1
TOTAL NUMBER OF OBSERVATIONS =741
POSSIBLE NUMBER OF OBSERVATIONS =744
DATA RECOVERY =99.6%

Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
Joint Frequency Distribution for October - December 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 0.8 2.4 0.7 0.0 0.0 0.0 3.8 2.3
NNE 11.25 - 33.75 0.9 1.8 0.2 0.0 0.0 0.0 2.8 1.9
NE 33.75 - 56.25 1.1 1.8 0.1 0.0 0.0 0.0 3.0 1.7
ENE 56.25 - 78.75 1.5 0.8 0.0 0.0 0.0 0.0 2.3 1.4
E 78.75 - 101.25 1.5 1.1 0.0 0.0 0.0 0.0 2.6 1.4
ESE 101.25 - 123.75 2.8 4.9 0.7 0.2 0.0 0.0 8.6 2.0
SE 123.75 - 146.25 2.8 4.5 1.8 1.5 0.0 0.0 10.6 2.8
SSE 146.25 - 168.75 2.2 1.6 1.5 0.7 0.0 0.0 6.1 2.8
S 168.75 - 191.25 1.1 1.3 0.6 0.1 0.0 0.0 3.1 2.3
SSW 191.25 - 213.75 1.0 0.9 0.5 0.1 0.0 0.0 2.5 2.2
SW 213.75 - 236.25 0.9 0.9 0.4 0.0 0.0 0.0 2.2 2.2
WSW 236.25 - 258.75 2.4 1.8 0.7 0.0 0.0 0.0 5.0 1.8
W 258.75 - 281.25 7.4 12.9 2.3 0.2 0.1 0.0 22.9 2.0
WNW 281.25 - 303.75 8.7 2.1 0.7 0.4 0.5 0.0 12.3 1.9
NW 303.75 - 326.25 2.7 2.6 0.9 0.1 0.0 0.0 6.3 2.0
NNW 326.25 - 348.75 1.7 1.7 0.8 0.0 0.0 0.0 4.2 2.1
1.7
39.3 42.9 12.0 3.5 0.6 0.0 100.0 2.1
TOTAL NUMBER OF OBSERVATIONS =2195
POSSIBLE NUMBER OF OBSERVATIONS =2208
DATA RECOVERY =99.4%
Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
WIND GUST in mps for OCTOBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 16.4 11.4 3.1 12.0 13.7 10.4 10.4 10.7 15.0 15.1 16.0 16.3 13.9 13.1 12.3 10.3 7.5 12.1 8.5 3.7 3.4 1.9 2.5 2.2 10.1 16.4 1.9
2 5.6 6.2 2.5 8.0 5.4 4.9 3.7 3.5 2.3 5.6 7.7 7.9 5.4 5.5 5.0 2.5 3.3 2.8 1.6 1.9 2.4 2.5 1.6 1.8 4.2 8.0 1.6
3 4.1 5.1 3.0 1.4 2.4 1.4 2.6 2.2 3.3 3.6 4.1 4.3 3.3 4.5 5.2 4.2 3.9 1.8 2.6 1.9 1.4 1.8 2.4 2.6 3.0 5.2 1.4
4 1.5 1.4 2.7 2.7 1.9 1.6 2.5 1.7 3.4 5.1 3.4 4.2 3.8 5.3 4.6 4.6 4.3 5.5 4.3 2.5 2.8 3.5 3.5 4.4 3.4 5.5 1.4
5 2.6 3.1 2.9 3.6 3.2 3.5 3.1 2.5 3.2 3.2 5.4 4.7 5.3 6.0 5.4 5.9 5.5 4.3 1.8 2.7 3.0 2.9 4.8 3.8 3.8 6.0 1.8
6 5.7 3.9 4.0 3.4 3.6 1.6 2.4 0.9 3.3 3.7 5.2 4.6 5.0 6.8 7.5 5.6 5.4 4.3 2.7 2.8 4.4 2.6 3.4 3.5 4.0 7.5 0.9
7 4.4 4.1 4.2 4.1 3.8 3.9 3.0 2.6 2.7 4.3 4.1 4.8 4.4 4.6 5.8 5.2 4.0 3.6 2.8 3.1 3.6 3.9 3.3 3.7 3.9 5.8 2.6
8 3.7 4.7 4.6 4.1 5.0 5.8 5.6 2.9 2.7 4.4 4.8 4.5 4.6 4.3 4.0 5.3 3.8 2.8 3.1 3.5 5.5 7.3 6.8 6.0 4.6 7.3 2.7
9 6.1 7.1 7.2 5.3 6.3 5.8 6.3 5.3 3.6 4.0 6.0 7.7 6.8 6.8 6.5 4.6 4.0 3.2 4.0 4.3 6.6 5.2 4.5 3.5 5.4 7.7 3.2
10 3.7 3.3 2.3 4.0 9.9 6.0 3.6 4.1 10.2 12.8 12.3 12.6 13.9 16.1 10.8 9.8 15.2 12.5 12.6 4.5 3.2 5.1 4.3 9.4 8.4 16.1 2.3
11 10.0 4.8 3.2 4.8 6.7 11.3 8.2 6.8 6.8 5.3 3.6 6.3 13.0 13.5 10.3 9.7 8.1 8.1 5.2 2.9 2.7 7.1 4.7 5.1 7.0 13.5 2.7
12 3.4 3.8 8.0 7.4 4.9 2.6 5.4 3.0 3.0 2.3 2.5 3.3 4.5 4.9 3.9 3.5 2.8 3.4 2.0 0.9 3.0 3.9 2.7 3.0 3.7 8.0 0.9
13 2.4 3.8 2.5 3.8 4.3 3.6 3.0 5.0 6.2 5.4 10.1 10.7 10.0 8.4 6.0 6.5 5.7 2.2 3.9 3.9 3.4 3.8 2.5 3.4 5.0 10.7 2.2
14 3.5 3.7 4.1 4.8 4.0 2.9 1.9 2.4 4.0 2.8 3.4 7.4 6.7 5.0 5.0 5.7 4.0 2.9 3.6 4.1 6.3 5.8 4.0 4.4 4.3 7.4 1.9
15 4.3 5.4 4.8 5.2 5.2 4.3 4.3 4.7 2.4 3.7 3.2 3.5 4.2 4.0 3.6 3.9 4.0 2.2 2.9 3.7 4.1 4.9 5.0 6.2 4.2 6.2 2.2
16 5.9 5.8 5.9 4.7 5.6 4.7 5.8 5.1 3.5 3.8 4.2 5.2 4.8 5.0 4.1 3.5 2.8 2.5 3.7 4.2 3.9 5.3 5.9 5.9 4.7 5.9 2.5
17 5.7 5.7 5.6 4.9 4.1 3.8 4.4 2.7 1.4 2.8 3.7 4.3 5.7 5.6 4.9 3.7 2.4 2.3 3.7 4.0 3.5 3.2 3.1 5.3 4.0 5.7 1.4
18 4.3 3.9 5.1 2.8 5.6 4.5 5.0 4.7 3.2 3.7 4.6 6.0 7.0 6.2 6.6 4.4 3.4 2.2 2.9 3.6 4.1 4.1 4.2 4.8 4.5 7.0 2.2
19 3.8 4.5 4.2 4.5 4.7 5.1 4.7 3.8 2.9 3.8 4.0 3.9 4.4 4.3 4.1 3.4 3.2 3.3 3.8 3.4 3.4 4.2 4.4 3.1 3.9 5.1 2.9
20 4.1 4.4 6.1 6.1 5.1 3.9 4.7 2.3 3.3 3.8 3.7 4.7 4.8 4.1 3.7 3.4 2.8 2.3 4.3 4.4 4.0 3.3 3.6 4.3 4.0 6.1 2.3
21 3.9 4.5 4.4 4.1 4.5 4.3 3.5 4.7 2.6 3.0 3.8 5.3 4.2 5.6 4.7 3.7 3.5 2.0 2.7 3.8 3.1 4.5 5.5 5.7 4.1 5.7 2.0
22 4.2 4.8 5.8 5.7 5.7 4.9 4.9 3.8 3.5 8.2 9.8 9.5 8.7 9.7 10.1 9.7 6.5 2.7 2.2 4.8 6.0 14.1 6.1 6.5 6.6 14.1 2.2
23 5.1 5.2 5.4 6.5 8.4 5.9 4.5 2.6 3.1 3.6 4.9 4.6 6.0 5.7 7.3 5.6 4.6 5.7 3.9 2.7 2.4 3.8 3.7 2.5 4.7 8.4 2.4
24 2.9 1.7 1.8 2.9 1.9 2.0 3.5 2.6 2.9 4.0 4.4 5.4 5.6 5.8 6.2 3.2 2.4 3.0 3.7 2.4 2.4 4.8 6.1 5.6 3.6 6.2 1.7
25 9.6 8.5 8.1 9.8 9.5 11.0 7.6 6.0 9.5 12.5 13.1 13.5 13.7 13.7 11.8 12.1 11.6 10.2 9.6 9.1 9.0 7.7 5.4 5.4 9.9 13.7 5.4
26 4.2 3.6 4.7 10.3 11.1 13.5 8.2 6.2 7.5 10.8 11.1 9.6 8.3 9.8 9.9 6.5 6.9 3.6 3.0 3.4 4.5 3.8 2.8 2.6 6.9 13.5 2.6
27 5.3 5.3 5.2 4.2 3.2 2.5 2.7 1.7 3.1 3.9 4.3 5.1 4.4 4.2 5.5 4.0 3.9 3.3 2.7 3.5 3.3 3.3 2.7 3.5 3.8 5.5 1.7
28 3.8 5.2 3.0 2.8 2.5 1.9 2.5 3.3 4.4 8.4 10.4 11.2 12.5 11.7 10.9 10.6 7.2 5.4 8.9 10.4 7.9 10.9 8.8 5.8 7.1 12.5 1.9
29 6.7 7.4 9.8 7.5 7.1 7.9 6.3 5.9 3.5 4.8 5.5 6.5 7.2 6.6 7.8 7.0 5.4 3.5 3.5 2.6 1.9 3.6 4.1 3.6 5.6 9.8 1.9
30 3.1 3.8 3.8 3.2 3.6 2.6 2.4 2.2 3.4 4.0 3.5 4.0 4.3 5.9 5.4 5.8 3.7 1.9 2.3 2.7 2.6 2.9 4.1 3.4 3.5 5.9 1.9
31 3.7 2.4 2.8 3.4 3.2 2.7 3.3 2.4 2.6 3.7 4.0 4.3 4.1 3.7 4.5 3.5 2.4 2.2 3.1 2.2 3.0 2.3 2.2 2.0 3.0 4.5 2.0
MEAN 5.0 4.8 4.5 5.1 5.4 4.9 4.5 3.8 4.3 5.3 6.0 6.6 6.8 7.0 6.6 5.7 5.0 4.1 4.0 3.7 3.9 4.6 4.1 4.3 5.0
MAX 16.4 11.4 9.8 12.0 13.7 13.5 10.4 10.7 15.0 15.1 16.0 16.3 13.9 16.1 12.3 12.1 15.2 12.5 12.6 10.4 9.0 14.1 8.8 9.4 16.4
MIN 1.5 1.4 1.8 1.4 1.9 1.4 1.9 0.9 1.4 2.3 2.5 3.3 3.3 3.7 3.6 2.5 2.4 1.8 1.6 0.9 1.4 1.8 1.6 1.8 0.9
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =5.0 mps
MAXIMUM WIND GUST =16.4 mps DATE OF OCCURRENCE =10/1 AT 0100 MAXIMUM DAILY MEAN =10.1 mps DATE OF OCCURRENCE =10/1
MINIMUM WIND GUST =0.9 mps DATE OF OCCURRENCE =10/6 AT 0800 MINUMUM DAILY MEAN =3.0 mps DATE OF OCCURRENCE =10/3
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
WIND GUST in mps for NOVEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 2.0 2.3 3.5 2.6 4.1 3.3 2.3 2.2 2.6 3.3 3.8 3.6 ------4.0 4.4 3.3 1.8 2.2 2.6 2.4 2.5 3.5 3.6 3.0 4.4 1.8
2 4.5 3.9 4.6 5.0 5.4 5.1 4.4 1.8 1.4 4.9 4.8 7.2 8.1 6.1 5.6 3.7 2.7 3.6 4.7 4.9 4.9 5.6 4.0 4.5 4.7 8.1 1.4
3 3.8 3.5 3.1 1.5 2.2 4.4 3.2 2.7 3.0 3.6 6.6 4.2 4.5 3.4 4.9 4.5 4.3 3.8 3.6 4.9 6.6 6.5 5.4 6.1 4.2 6.6 1.5
4 5.7 6.1 5.2 5.2 5.5 5.9 5.6 4.2 3.4 4.4 4.9 7.7 5.3 4.5 4.8 3.8 3.1 2.4 2.6 4.3 7.7 9.1 8.5 8.7 5.4 9.1 2.4
5 8.0 8.5 10.1 5.2 7.0 3.7 3.1 9.7 6.3 4.8 5.1 4.5 4.2 3.3 3.9 3.3 2.9 4.1 5.4 4.8 4.1 7.6 8.0 5.9 5.6 10.1 2.9
6 6.0 4.9 2.5 2.9 2.6 5.9 5.7 5.4 8.8 9.4 8.8 13.2 11.4 11.6 8.3 6.2 5.1 2.9 6.8 11.4 10.2 9.3 8.9 9.5 7.4 13.2 2.5
7 9.3 5.9 7.1 6.3 6.1 5.0 5.1 5.5 2.4 6.1 5.3 4.2 4.8 3.2 3.9 3.9 3.7 2.5 3.5 2.9 5.2 9.2 6.2 5.2 5.1 9.3 2.4
8 5.6 4.7 4.7 6.2 4.7 4.0 3.8 4.9 4.7 5.9 7.3 8.3 7.5 6.6 6.8 4.5 5.9 6.6 3.2 3.8 2.8 2.8 3.3 3.4 5.1 8.3 2.8
9 3.3 3.1 1.6 1.7 2.7 3.7 3.5 3.8 3.3 3.6 4.0 3.9 4.9 4.6 6.0 4.6 3.0 2.0 3.3 4.3 3.5 3.5 3.4 3.3 3.5 6.0 1.6
10 4.0 3.2 4.3 2.8 2.6 2.8 3.6 2.8 2.9 4.2 5.0 5.5 5.8 4.6 3.7 3.5 2.7 1.6 2.8 3.5 2.8 3.1 5.0 4.3 3.6 5.8 1.6
11 4.1 4.8 3.5 2.2 2.8 2.9 3.7 3.8 3.0 2.0 4.2 4.3 4.7 4.9 4.5 2.8 2.5 2.5 3.8 5.3 5.8 4.9 5.4 4.7 3.9 5.8 2.0
12 4.7 4.4 5.1 4.8 5.2 5.1 5.8 6.1 1.4 3.6 4.6 6.0 7.2 7.5 8.0 5.5 2.9 3.2 3.2 2.2 5.7 3.3 6.7 8.7 5.0 8.7 1.4
13 6.2 7.8 12.6 12.0 9.5 5.3 6.5 5.6 4.5 7.8 11.9 13.4 10.9 11.4 13.3 8.8 4.1 3.2 2.4 3.5 4.4 6.1 6.7 7.7 7.7 13.4 2.4
14 11.4 7.7 7.4 8.9 8.6 10.1 6.7 8.2 7.8 10.0 11.3 11.7 12.1 11.7 6.3 5.7 5.3 3.8 4.1 4.3 4.1 2.8 4.6 5.5 7.5 12.1 2.8
15 5.7 7.1 6.2 5.5 5.3 4.2 7.3 7.7 7.8 9.3 10.8 11.9 12.7 11.9 11.4 13.0 8.6 8.6 9.8 7.1 10.3 9.8 13.1 7.9 8.9 13.1 4.2
16 8.8 9.8 10.8 9.2 7.3 12.9 13.6 3.0 2.6 3.4 4.4 3.8 3.9 2.7 3.3 2.9 1.8 3.6 3.1 4.6 4.3 6.3 5.4 3.6 5.6 13.6 1.8
17 6.8 6.8 4.8 4.3 4.1 2.3 2.2 2.5 2.8 3.6 4.2 4.0 4.4 4.1 3.6 3.7 2.0 2.6 2.7 2.6 2.3 1.8 1.9 2.2 3.4 6.8 1.8
18 3.7 5.1 2.4 7.0 6.7 5.1 7.2 7.5 5.2 3.1 6.3 4.1 4.3 3.8 10.6 3.3 2.2 1.8 1.9 5.1 4.4 4.9 2.6 2.4 4.6 10.6 1.8
19 2.2 7.9 7.0 5.1 7.4 6.8 4.6 4.8 7.6 8.0 1.9 7.9 10.8 10.7 13.8 17.2 16.7 17.4 6.5 7.1 7.5 9.0 6.3 5.5 8.3 17.4 1.9
20 6.3 5.3 5.5 8.6 9.7 9.3 7.0 7.9 6.6 5.6 7.1 4.7 4.3 3.9 5.6 6.7 5.1 4.8 4.3 5.5 5.7 3.8 3.5 2.7 5.8 9.7 2.7
21 3.3 3.0 3.7 4.1 5.5 2.9 2.6 3.5 3.3 3.4 4.1 3.5 4.0 3.6 3.0 3.5 3.0 1.7 3.1 1.8 1.8 2.0 2.6 3.3 3.2 5.5 1.7
22 3.6 2.6 2.4 2.4 1.7 3.5 2.5 2.4 2.3 3.6 3.6 3.6 3.9 3.7 4.0 2.8 1.1 2.3 2.0 2.6 2.2 2.6 1.8 2.2 2.7 4.0 1.1
23 2.9 1.9 1.9 1.7 1.7 2.2 1.7 1.7 3.3 3.5 3.7 1.9 4.3 4.4 3.8 4.0 3.3 3.8 3.3 3.0 2.8 ---------2.9 4.4 1.7
24 ---------------5.0 4.8 7.0 6.3 7.5 4.9 5.4 4.8 4.3 4.9 3.9 4.9 4.8 3.2 3.9 3.7 3.7 3.7 4.4 4.8 7.5 3.2
25 4.6 5.6 6.3 6.0 4.5 3.9 2.8 2.2 3.5 4.1 4.4 3.6 6.8 7.1 5.4 4.5 6.3 6.9 2.5 2.2 1.9 2.2 1.3 1.7 4.2 7.1 1.3
26 1.2 1.8 1.5 1.7 1.6 1.6 1.5 0.7 2.3 2.2 2.5 3.4 2.9 3.4 3.0 2.9 2.6 1.0 1.4 1.4 2.8 3.2 2.8 3.1 2.2 3.4 0.7
27 3.1 3.3 3.3 3.7 3.2 3.7 3.2 2.6 2.3 2.4 3.5 3.8 3.2 3.4 2.8 3.2 1.7 1.5 2.2 1.9 1.9 1.6 1.7 1.9 2.7 3.8 1.5
28 1.5 1.8 2.0 1.7 2.3 1.4 1.6 1.8 1.5 2.2 3.5 3.0 4.0 3.5 3.4 2.6 1.4 2.2 2.3 2.0 1.8 4.6 5.5 2.6 2.5 5.5 1.4
29 2.2 2.0 2.2 2.9 1.7 1.5 1.1 1.5 1.8 3.3 3.1 3.2 3.0 3.6 3.1 3.7 1.8 0.9 1.3 1.5 1.5 1.3 2.6 2.5 2.2 3.7 0.9
30 2.2 2.8 2.0 2.5 2.0 2.4 2.5 1.9 1.2 1.3 2.2 2.3 3.0 3.2 2.4 2.7 1.6 1.1 1.1 1.6 1.8 2.0 1.3 2.0 2.0 3.2 1.1
MEAN 4.7 4.7 4.7 4.6 4.6 4.5 4.3 4.2 3.9 4.7 5.3 5.6 5.9 5.5 5.6 4.9 3.9 3.6 3.4 3.9 4.2 4.7 4.7 4.4 4.6
MAX 11.4 9.8 12.6 12.0 9.7 12.9 13.6 9.7 8.8 10.0 11.9 13.4 12.7 11.9 13.8 17.2 16.7 17.4 9.8 11.4 10.3 9.8 13.1 9.5 17.4
MIN 1.2 1.8 1.5 1.5 1.6 1.4 1.1 0.7 1.2 1.3 1.9 1.9 2.9 2.7 2.4 2.6 1.1 0.9 1.1 1.4 1.5 1.3 1.3 1.7 0.7
POSSIBLE NUMBER OF OBSERVATIONS =720 ACTUAL NUMBER OF OBSERVATIONS =710 DATA RECOVERY RATE =
MONTHLY MEAN =4.6 mps
MAXIMUM WIND GUST =17.4 mps DATE OF OCCURRENCE =11/19 AT 1800 MAXIMUM DAILY MEAN =8.9 mps DATE OF OCCURRENCE =11/15
MINIMUM WIND GUST =0.7 mps DATE OF OCCURRENCE =11/26 AT 0800 MINUMUM DAILY MEAN =2.0 mps DATE OF OCCURRENCE =11/30
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
98.6%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
WIND GUST in mps for DECEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 3.1 3.1 3.0 3.4 2.3 2.6 2.6 1.8 3.1 4.7 6.7 5.5 5.6 3.1 4.0 3.8 2.0 3.0 2.8 4.4 4.9 3.4 5.7 8.8 3.9 8.8 1.8
2 12.3 11.8 10.2 9.7 8.0 4.5 3.7 3.7 3.9 6.5 7.8 8.8 10.4 11.4 10.1 10.8 8.9 7.4 5.0 11.3 11.2 10.8 17.1 12.6 9.1 17.1 3.7
3 13.1 8.0 5.1 3.2 3.1 2.8 3.3 ---------1.7 1.6 2.7 1.8 1.5 1.9 2.6 2.3 2.7 2.6 2.2 2.4 2.5 8.9 3.6 13.1 1.5
4 10.8 4.7 2.0 2.8 3.1 3.7 3.3 3.3 3.6 2.4 6.0 4.1 5.5 5.0 3.3 2.8 3.0 4.2 4.4 6.5 5.6 4.0 6.6 5.8 4.4 10.8 2.0
5 5.5 4.5 4.9 5.1 3.7 4.4 6.0 3.8 3.8 3.4 4.0 4.5 4.4 3.6 3.8 2.6 2.9 2.4 3.2 3.8 2.8 3.6 4.3 5.4 4.0 6.0 2.4
6 4.6 3.2 3.4 3.2 2.9 2.7 2.7 2.7 11.2 11.8 12.1 11.6 11.1 12.4 9.6 8.6 8.9 4.7 8.3 11.9 12.1 9.9 13.2 14.1 8.2 14.1 2.7
7 19.7 19.6 11.3 18.5 7.7 6.0 10.8 19.3 18.8 18.2 16.5 16.9 12.6 5.6 8.3 3.0 2.2 3.4 3.1 2.4 3.2 3.4 2.4 6.7 10.0 19.7 2.2
8 9.7 7.8 7.4 12.7 17.2 19.8 17.6 16.8 14.6 14.2 14.0 15.9 17.7 17.5 17.9 15.5 14.2 12.7 12.8 6.7 5.8 5.2 3.5 2.8 12.5 19.8 2.8
9 3.4 3.1 2.9 3.8 5.0 3.8 3.0 2.3 2.8 2.5 3.2 4.2 4.2 3.2 2.4 3.0 2.2 2.7 4.2 4.0 5.2 5.0 4.1 3.5 3.5 5.2 2.2
10 2.5 3.0 2.6 2.3 1.7 3.3 1.9 2.4 2.5 1.9 4.0 3.2 2.7 3.9 3.1 3.3 2.6 2.9 2.0 2.4 2.6 2.5 1.9 1.9 2.6 4.0 1.7
11 2.9 1.9 1.9 2.8 2.8 2.3 2.3 2.5 1.9 2.6 2.6 3.9 3.6 3.2 3.4 3.7 2.6 2.5 1.9 2.0 1.4 1.8 1.9 1.8 2.5 3.9 1.4
12 2.5 2.3 2.0 1.6 1.5 1.3 2.0 1.2 1.9 1.7 2.5 4.8 5.4 4.6 4.2 3.9 3.8 3.2 4.5 4.2 4.3 4.7 4.0 4.1 3.2 5.4 1.2
13 3.5 4.0 6.3 6.1 6.0 8.0 7.2 7.6 7.2 10.7 8.6 6.7 4.7 4.6 4.4 4.3 1.9 2.4 3.8 3.3 3.1 3.3 3.7 3.4 5.2 10.7 1.9
14 2.9 2.5 2.4 2.9 2.6 2.5 2.0 2.8 2.3 2.9 4.1 3.9 4.3 4.4 3.1 2.5 1.8 2.6 2.2 2.5 3.1 2.2 2.5 2.4 2.8 4.4 1.8
15 3.4 2.7 2.4 2.3 2.2 3.6 2.9 2.7 2.5 1.5 3.6 2.6 4.2 3.4 2.6 3.4 2.2 2.0 2.7 2.0 1.8 1.4 2.0 2.0 2.6 4.2 1.4
16 2.2 2.0 2.7 2.7 1.9 2.5 2.0 1.6 1.5 1.5 3.9 3.2 4.2 3.8 3.5 2.5 1.5 2.0 3.3 1.9 1.9 2.7 2.5 1.8 2.5 4.2 1.5
17 2.8 2.3 1.9 2.2 1.9 1.7 1.9 1.2 2.0 2.9 3.3 3.3 4.6 4.0 3.1 2.2 2.0 2.6 2.3 1.8 1.6 1.6 1.8 1.9 2.4 4.6 1.2
18 2.2 2.7 2.4 2.7 1.7 1.7 1.8 2.5 3.3 2.8 2.7 4.8 4.6 3.7 4.3 3.8 3.3 3.1 6.2 5.6 4.8 7.6 5.2 7.7 3.8 7.7 1.7
19 11.0 12.1 11.8 3.8 6.8 8.0 3.1 3.1 7.4 8.7 6.1 9.3 10.7 11.4 10.4 8.6 4.0 2.9 5.6 9.9 7.0 6.0 8.5 8.8 7.7 12.1 2.9
20 6.7 5.3 4.7 3.1 2.8 7.1 8.2 6.5 6.1 4.5 6.8 7.3 8.9 6.9 7.1 6.5 5.0 5.5 5.1 4.1 5.1 3.1 4.2 4.9 5.6 8.9 2.8
21 5.8 4.7 3.9 1.8 1.7 2.4 2.2 2.6 1.7 3.1 7.4 7.7 7.3 3.4 3.2 3.6 1.4 2.4 2.3 2.3 1.8 2.9 4.2 4.3 3.5 7.7 1.4
22 3.4 2.9 3.3 3.2 1.7 3.1 3.6 3.9 5.1 7.1 7.8 10.3 11.0 10.4 9.0 6.5 2.6 2.4 1.5 1.9 1.8 1.7 2.0 2.2 4.5 11.0 1.5
23 2.0 2.5 4.2 2.9 2.6 5.5 5.2 4.0 5.5 7.2 6.8 7.8 8.6 7.6 6.6 7.9 5.4 3.8 6.1 3.9 4.5 5.7 5.1 5.2 5.3 8.6 2.0
24 5.4 4.8 5.6 5.7 5.1 5.0 5.4 4.4 4.9 4.7 5.2 4.5 5.2 5.6 5.3 4.5 3.8 3.4 2.6 2.9 3.6 3.4 3.3 3.0 4.5 5.7 2.6
25 3.0 4.0 4.4 3.5 4.4 4.4 2.8 3.0 2.7 1.6 3.9 4.6 3.9 4.9 5.4 4.4 3.1 1.4 1.8 2.6 2.6 3.0 2.7 2.5 3.3 5.4 1.4
26 2.3 1.8 2.8 2.9 3.3 2.7 2.8 3.0 3.3 3.0 3.7 3.8 4.5 4.3 3.4 3.3 3.3 1.9 2.0 1.9 2.2 2.7 2.2 1.8 2.9 4.5 1.8
27 3.2 1.9 1.2 1.6 1.1 1.7 1.1 2.5 1.0 2.3 2.8 4.7 4.9 4.2 4.1 2.8 2.6 1.8 3.0 1.5 2.2 2.9 1.5 2.6 2.5 4.9 1.0
28 1.7 1.6 2.3 1.4 1.4 1.7 1.9 1.9 3.0 2.2 3.9 3.6 4.0 4.6 3.5 3.4 1.9 2.2 2.4 2.4 2.3 1.8 2.0 2.2 2.5 4.6 1.4
29 2.2 1.9 1.7 1.8 1.8 2.0 2.4 2.5 2.5 2.4 2.6 2.9 4.1 4.1 2.4 2.2 1.8 2.2 2.2 2.7 2.8 2.4 2.6 4.0 2.5 4.1 1.7
30 5.5 4.2 4.5 6.6 5.5 5.2 5.1 5.7 7.6 8.1 5.4 7.1 6.7 4.2 3.4 3.7 2.7 3.3 3.0 1.7 2.3 2.0 2.5 2.4 4.5 8.1 1.7
31 3.3 4.9 3.5 1.9 2.0 2.5 1.6 3.3 3.1 3.1 3.6 3.4 3.7 3.9 3.8 3.1 2.0 2.0 1.8 2.8 2.8 1.4 1.4 1.6 2.8 4.9 1.4
MEAN 5.2 4.6 4.1 4.1 3.7 4.1 3.9 4.1 4.7 5.0 5.6 6.0 6.3 5.6 5.2 4.6 3.5 3.3 3.7 3.9 3.8 3.7 4.1 4.6 4.5
MAX 19.7 19.6 11.8 18.5 17.2 19.8 17.6 19.3 18.8 18.2 16.5 16.9 17.7 17.5 17.9 15.5 14.2 12.7 12.8 11.9 12.1 10.8 17.1 14.1 19.8
MIN 1.7 1.6 1.2 1.4 1.1 1.3 1.1 1.2 1.0 1.5 1.7 1.6 2.7 1.8 1.5 1.9 1.4 1.4 1.5 1.5 1.4 1.4 1.4 1.6 1.0
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =741 DATA RECOVERY RATE =
MONTHLY MEAN =4.5 mps
MAXIMUM WIND GUST =19.8 mps DATE OF OCCURRENCE =12/8 AT 0600 MAXIMUM DAILY MEAN =12.5 mps DATE OF OCCURRENCE =12/8
MINIMUM WIND GUST =1.0 mps DATE OF OCCURRENCE =12/27 AT 0900 MINUMUM DAILY MEAN =2.4 mps DATE OF OCCURRENCE =12/17
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
99.6%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
RELATIVE HUMIDITY in % for OCTOBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 68 79 86 79 74 80 72 71 64 55 46 41 34 33 28 29 30 43 53 52 50 56 61 59 56 86 28
2 54 61 67 78 90 89 84 80 88 88 84 85 85 93 94 92 83 83 85 86 83 77 81 73 82 94 54
3 76 78 86 87 85 79 79 73 75 71 68 70 69 70 81 84 87 90 93 95 94 93 87 84 81 95 68
4 81 82 87 91 89 91 90 87 78 74 74 71 66 62 62 60 58 64 69 69 69 62 62 61 73 91 58
5 64 62 67 66 63 66 65 56 58 57 55 52 50 52 53 55 55 59 65 67 64 62 62 57 60 67 50
6 55 59 59 57 56 62 61 55 54 51 46 44 37 39 50 45 48 50 53 55 56 57 57 59 53 62 37
7 62 63 63 62 60 59 59 55 54 52 51 47 44 39 38 40 45 50 56 57 56 55 54 54 53 63 38
8 51 50 49 49 46 44 45 45 45 44 42 39 35 30 29 32 36 42 44 44 40 36 33 31 41 51 29
9 29 28 27 30 31 30 28 29 34 37 33 28 25 21 18 18 20 26 27 26 25 24 21 22 27 37 18
10 23 26 29 27 27 30 34 31 27 26 28 27 23 19 19 18 22 27 29 39 40 40 39 39 29 40 18
11 43 53 53 47 44 67 80 80 86 86 77 74 61 69 59 68 83 82 86 85 88 87 81 87 72 88 43
12 89 90 90 88 88 89 90 92 93 94 94 93 87 81 91 95 95 95 93 91 90 83 71 77 89 95 71
13 77 76 77 76 77 73 72 67 66 70 63 56 52 49 47 45 43 53 56 54 56 57 57 58 62 77 43
14 59 55 54 49 51 52 54 54 50 51 46 40 37 36 34 31 29 42 45 47 47 44 48 47 46 59 29
15 42 42 42 41 39 41 42 40 39 39 37 34 33 31 34 41 45 55 49 47 47 44 41 38 41 55 31
16 36 36 36 38 37 37 36 35 37 37 36 32 28 26 24 23 29 46 38 38 38 31 29 29 34 46 23
17 28 28 28 29 31 33 34 35 34 32 29 28 34 31 32 34 35 43 40 40 39 36 36 37 34 43 28
18 38 42 42 46 46 46 48 42 42 41 38 39 35 34 35 37 39 47 50 48 46 47 47 45 43 50 34
19 48 49 48 50 50 49 50 46 44 42 43 40 38 37 35 36 41 50 51 50 50 47 46 46 45 51 35
20 43 39 36 37 38 42 43 39 36 36 36 34 33 31 29 29 36 43 45 45 43 42 43 40 38 45 29
21 42 42 41 42 40 41 43 38 35 37 39 36 35 34 39 33 34 42 43 44 44 44 43 38 39 44 33
22 36 34 33 32 32 33 32 33 40 31 30 28 28 26 25 24 26 30 31 27 28 34 39 35 31 40 24
23 29 27 29 30 32 37 45 49 50 43 45 45 46 46 59 45 59 53 56 62 63 66 68 65 48 68 27
24 69 71 73 78 78 76 73 68 75 72 67 62 55 55 56 55 52 59 59 58 58 49 46 45 63 78 45
25 47 46 45 52 54 49 46 44 43 33 34 29 27 25 23 23 25 27 30 31 50 64 66 70 41 70 23
26 71 72 80 93 81 83 91 92 78 59 57 51 47 44 39 32 41 55 62 62 60 58 57 57 63 93 32
27 52 49 47 41 45 46 48 49 47 48 47 47 44 40 40 40 44 53 58 60 56 53 48 43 48 60 40
28 42 49 48 57 62 65 67 69 65 62 61 56 59 56 52 48 47 50 51 56 66 59 57 58 57 69 42
29 60 54 50 56 59 58 53 52 51 54 50 37 38 32 32 39 45 51 53 53 53 54 55 52 50 60 32
30 44 49 50 51 52 54 54 52 48 51 50 48 44 42 42 40 39 46 49 50 48 49 46 42 48 54 39
31 44 48 45 42 44 45 41 40 41 42 45 43 40 38 36 35 39 46 49 46 44 43 47 45 43 49 35
MEAN 52 53 54 55 55 56 57 55 54 52 50 47 44 43 43 43 45 52 54 54 55 53 53 51 51
MAX 89 90 90 93 90 91 91 92 93 94 94 93 87 93 94 95 95 95 93 95 94 93 87 87 95
MIN 23 26 27 27 27 30 28 29 27 26 28 27 23 19 18 18 20 26 27 26 25 24 21 22 18
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =51 %
MAXIMUM RELATIVE HUMIDITY =95 %DATE OF OCCURRENCE =10/12 AT 1700 MAXIMUM DAILY MEAN =89 %DATE OF OCCURRENCE =10/12
MINIMUM RELATIVE HUMIDITY =18 %DATE OF OCCURRENCE =10/10 AT 1600 MINUMUM DAILY MEAN =27 %DATE OF OCCURRENCE =10/9
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
RELATIVE HUMIDITY in % for NOVEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 44 40 35 37 34 35 35 32 30 30 32 28 ------27 32 36 42 44 40 39 37 34 28 35 44 27
2 26 26 26 26 26 25 24 25 27 27 26 20 18 17 19 19 22 27 29 28 30 29 29 30 25 30 17
3 43 45 44 39 39 54 56 55 48 44 44 43 41 38 40 41 48 53 53 52 50 49 48 45 46 56 38
4 45 43 44 45 45 44 44 44 42 41 37 34 34 32 31 31 33 35 35 32 30 30 31 33 37 45 30
5 27 21 20 21 23 23 23 31 39 37 50 50 39 32 29 25 29 31 30 27 27 22 22 25 29 50 20
6 26 28 30 29 30 28 25 25 27 26 25 25 22 19 18 21 24 27 23 22 28 40 58 61 29 61 18
7 73 77 78 87 88 90 89 88 89 80 79 86 85 87 82 75 73 75 84 91 94 92 79 72 83 94 72
8 71 72 73 73 77 77 75 75 74 74 65 59 60 59 58 57 58 57 55 53 56 58 59 59 65 77 53
9 58 59 61 65 66 69 70 71 66 65 63 58 52 53 56 60 64 72 69 66 62 55 55 52 62 72 52
10 44 41 41 43 46 48 42 38 50 57 50 50 46 43 40 40 45 53 55 52 49 46 38 35 46 57 35
11 32 31 31 34 36 40 34 33 36 42 34 30 29 27 25 25 30 37 40 36 33 30 30 30 33 42 25
12 32 32 33 33 33 33 34 32 29 26 26 25 24 21 20 18 24 29 29 30 21 19 20 21 27 34 18
13 20 20 17 16 18 18 18 18 19 17 14 14 16 16 15 17 18 19 22 25 25 23 26 29 19 29 14
14 29 31 33 33 35 36 37 37 36 34 33 33 33 31 26 28 33 35 33 37 38 38 36 36 34 38 26
15 38 39 40 41 41 43 45 43 42 41 38 38 37 36 33 32 36 38 37 37 38 38 39 40 39 45 32
16 42 50 78 79 82 90 79 93 93 91 92 92 91 92 89 86 87 90 85 78 73 70 68 69 81 93 42
17 66 61 62 65 63 67 71 74 70 66 69 66 63 59 59 62 69 79 80 75 74 74 76 70 68 80 59
18 65 55 61 59 57 55 50 48 61 68 66 66 64 66 64 67 67 77 81 75 69 68 73 77 65 81 48
19 77 66 66 73 72 77 81 84 78 79 83 85 76 74 74 75 79 82 91 94 96 96 95 93 81 96 66
20 87 83 81 79 74 72 74 76 78 79 79 73 63 59 58 58 64 65 66 66 62 60 64 66 70 87 58
21 68 70 71 70 69 71 71 69 66 67 69 67 67 65 62 64 69 77 78 73 75 76 76 78 70 78 62
22 74 66 70 69 69 71 70 68 68 68 74 69 65 62 62 62 69 78 78 75 77 75 72 65 70 78 62
23 59 56 62 60 62 63 67 71 76 76 71 75 71 74 79 81 80 76 83 89 93 94 95 95 75 95 56
24 96 96 96 97 97 96 95 90 82 86 85 77 75 75 77 80 86 83 82 84 84 81 84 85 86 97 75
25 81 81 78 77 73 82 84 85 84 79 78 72 70 63 66 72 75 71 70 67 66 69 71 72 74 85 63
26 74 80 86 87 82 82 81 81 81 77 70 71 71 67 68 66 69 72 73 72 72 76 77 77 75 87 66
27 76 77 76 74 77 73 72 77 71 67 67 67 66 66 65 65 71 77 79 79 80 82 82 81 74 82 65
28 80 79 77 72 72 67 69 70 64 69 74 71 70 68 65 63 72 80 82 80 81 74 47 62 71 82 47
29 73 79 70 58 54 60 67 72 67 64 69 74 77 75 72 79 84 87 90 91 92 92 94 95 76 95 54
30 95 95 95 95 95 95 95 95 95 96 96 96 97 96 95 91 86 87 88 89 90 89 77 71 92 97 71
MEAN 57 57 58 58 58 59 59 60 60 59 59 57 56 54 52 53 57 60 61 61 60 59 58 58 58
MAX 96 96 96 97 97 96 95 95 95 96 96 96 97 96 95 91 87 90 91 94 96 96 95 95 97
MIN 20 20 17 16 18 18 18 18 19 17 14 14 16 16 15 17 18 19 22 22 21 19 20 21 14
POSSIBLE NUMBER OF OBSERVATIONS =720 ACTUAL NUMBER OF OBSERVATIONS =718 DATA RECOVERY RATE =
MONTHLY MEAN =58 %
MAXIMUM RELATIVE HUMIDITY =97 %DATE OF OCCURRENCE =11/24 AT 0400 MAXIMUM DAILY MEAN =92 %DATE OF OCCURRENCE =11/30
MINIMUM RELATIVE HUMIDITY =14 %DATE OF OCCURRENCE =11/13 AT 1100 MINUMUM DAILY MEAN =19 %DATE OF OCCURRENCE =11/13
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
99.7%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
RELATIVE HUMIDITY in % for DECEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 79 70 72 85 89 87 82 81 83 89 85 85 90 94 95 95 94 93 90 89 89 93 95 89 87 95 70
2 77 75 69 62 62 78 79 77 80 80 84 72 72 77 78 77 77 75 73 63 57 62 62 55 72 84 55
3 61 85 92 95 95 96 96 97 97 97 97 95 93 92 93 94 95 96 95 93 93 94 93 88 93 97 61
4 75 80 82 84 85 85 84 81 77 69 71 73 73 67 72 74 75 74 71 70 70 71 68 65 75 85 65
5 64 65 62 62 62 64 61 67 58 60 59 59 54 59 58 54 67 67 59 56 56 51 45 44 59 67 44
6 42 40 42 45 44 46 52 55 37 34 36 35 35 38 42 41 40 36 36 35 37 44 41 36 40 55 34
7 31 35 34 38 39 44 57 53 38 37 42 55 53 55 62 57 63 66 61 61 60 55 56 53 50 66 31
8 57 68 85 73 69 69 61 53 50 52 53 51 53 57 60 59 66 57 60 75 86 78 69 74 64 86 50
9 80 78 79 72 71 80 80 75 75 73 71 72 72 70 64 63 68 72 70 69 66 65 62 59 71 80 59
10 59 57 61 57 56 53 56 51 53 47 37 46 41 38 38 42 43 48 49 50 48 53 55 50 50 61 37
11 50 52 56 61 56 56 56 54 52 49 48 47 48 45 51 60 66 71 69 70 70 72 73 74 59 74 45
12 77 77 73 68 71 77 77 78 76 73 73 65 64 61 61 62 64 65 69 70 69 66 62 62 69 78 61
13 66 65 65 67 67 68 68 66 62 59 57 56 55 53 52 55 61 65 65 64 65 66 66 66 62 68 52
14 69 68 66 68 71 71 73 72 68 64 63 64 65 66 64 64 69 73 74 75 76 74 75 69 69 76 63
15 62 60 64 65 65 67 64 63 60 57 66 63 59 59 58 61 72 75 77 70 70 70 56 58 64 77 56
16 55 52 58 58 64 61 53 52 55 57 58 57 53 54 54 59 66 70 74 74 70 55 50 52 59 74 50
17 61 58 63 61 61 57 56 61 59 51 56 56 60 63 63 65 71 77 77 61 51 55 49 43 60 77 43
18 56 48 54 49 50 46 50 60 67 62 64 45 47 54 51 68 77 73 42 38 33 35 37 38 52 77 33
19 34 37 38 35 35 37 37 40 44 51 53 44 36 38 39 40 44 46 57 57 59 64 64 59 45 64 34
20 68 65 61 59 64 56 53 52 53 57 59 57 58 58 56 57 59 61 63 64 66 67 65 64 60 68 52
21 62 61 63 64 66 70 70 69 66 62 56 55 54 54 52 55 61 65 67 69 68 64 62 60 62 70 52
22 61 61 62 63 65 66 66 64 63 57 55 53 52 52 51 53 57 61 62 61 62 64 66 67 60 67 51
23 67 67 67 68 72 79 86 94 95 92 88 79 78 60 53 55 65 61 65 86 81 81 76 68 74 95 53
24 69 75 79 72 64 60 66 65 61 67 69 81 65 53 58 55 55 60 62 63 66 67 67 68 65 81 53
25 65 64 65 65 61 58 60 61 60 55 60 63 58 56 60 62 66 71 75 75 70 67 66 65 64 75 55
26 66 65 65 63 60 61 63 62 60 61 66 64 55 54 55 53 53 59 60 61 69 78 79 78 63 79 53
27 75 74 73 72 73 74 77 75 73 67 64 62 63 61 61 61 66 73 78 79 79 73 76 75 71 79 61
28 74 75 75 71 71 69 67 74 67 73 66 64 62 62 63 66 70 73 67 67 72 68 64 64 69 75 62
29 62 67 69 71 67 67 62 66 67 69 66 60 56 54 52 52 57 59 60 58 50 46 46 48 60 71 46
30 45 43 41 42 40 39 41 41 35 35 41 38 37 39 44 50 51 62 53 56 55 56 59 56 46 62 35
31 53 53 55 56 61 62 63 60 53 58 62 65 60 60 61 63 70 74 73 64 65 73 75 69 63 75 53
MEAN 62 63 64 64 64 65 65 65 63 62 62 61 59 58 59 60 65 67 66 66 65 65 64 62 63
MAX 80 85 92 95 95 96 96 97 97 97 97 95 93 94 95 95 95 96 95 93 93 94 95 89 97
MIN 31 35 34 35 35 37 37 40 35 34 36 35 35 38 38 40 40 36 36 35 33 35 37 36 31
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =63 %
MAXIMUM RELATIVE HUMIDITY =97 %DATE OF OCCURRENCE =12/3 AT 1000 MAXIMUM DAILY MEAN =93 %DATE OF OCCURRENCE =12/3
MINIMUM RELATIVE HUMIDITY =31 %DATE OF OCCURRENCE =12/7 AT 0100 MINUMUM DAILY MEAN =40 %DATE OF OCCURRENCE =12/6
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country Page 1
Wind Speed and Direction in mps for October, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13
Day
1 193/06.5 191/03.2 183/04.9 206/05.2 181/09.8 180/07.8 175/06.9 169/08.5 168/09.9 173/12.0 178/12.2 181/11.7 183/11.1
2 208/03.2 220/04.0 220/03.0 169/03.1 155/02.7 178/02.2 224/02.5 192/03.6 189/03.4 171/03.9 176/05.0 265/03.8 303/04.6
3 298/01.4 174/02.0 184/01.2 219/01.9 226/02.5 229/02.8 213/03.9 214/03.2 177/02.9 152/01.6 061/01.7 017/03.1 057/02.1
4 251/01.4 240/01.3 360/01.4 259/01.7 232/01.7 291/01.5 097/01.0 320/00.8 061/01.4 064/02.1 048/02.8 041/02.4 055/02.0
5 216/02.0 346/01.5 271/01.3 267/01.0 308/01.0 274/01.6 251/01.7 306/01.3 029/01.6 028/01.9 039/02.1 050/02.3 041/02.5
6 298/02.4 301/02.5 326/02.9 337/02.6 355/01.7 326/01.5 017/00.8 331/00.7 018/02.2 011/03.3 026/03.2 015/03.7 005/03.7
7 222/02.4 223/02.6 222/02.3 227/02.5 229/02.0 249/01.1 256/01.2 190/01.6 058/01.5 059/02.0 038/02.4 037/02.6 037/02.4
8 221/02.1 226/02.0 228/03.1 229/03.4 224/03.5 218/03.9 245/03.1 113/00.5 054/01.1 061/01.6 058/02.2 032/02.8 034/02.4
9 227/04.7 229/04.2 227/04.6 231/03.9 231/04.3 227/04.8 224/04.8 180/01.9 125/02.0 125/02.6 166/04.4 162/04.7 149/04.6
10 195/05.0 189/06.8 194/06.6 217/04.8 303/02.4 332/02.2 220/04.6 190/06.4 178/07.7 170/07.7 165/07.8 166/07.7 184/07.1
11 196/02.2 173/02.1 200/02.3 303/02.5 344/04.2 321/06.6 327/05.7 314/06.8 354/05.1 020/03.9 046/02.6 041/02.7 317/07.4
12 038/02.6 121/01.7 138/01.6 236/01.5 274/01.8 303/02.7 011/03.2 128/01.3 138/01.5 049/01.4 049/01.4 039/01.7 354/02.9
13 243/01.6 229/01.7 221/03.1 212/02.5 222/03.4 204/03.5 202/04.4 194/04.9 171/04.3 159/04.9 159/05.5 155/06.0 147/05.7
14 211/04.3 210/05.1 218/04.8 217/05.8 208/06.7 216/04.4 223/01.1 256/01.2 189/04.4 187/05.2 185/05.2 171/05.9 167/04.9
15 218/02.0 235/02.2 224/02.9 228/02.6 233/02.8 211/02.2 218/02.1 222/01.5 022/00.9 057/01.5 026/01.9 034/01.8 061/02.0
16 225/03.2 230/03.5 243/02.4 247/01.8 233/02.2 227/02.6 221/04.6 191/03.5 170/04.4 171/06.7 167/05.8 155/05.0 103/03.3
17 216/04.5 208/05.1 234/02.9 238/02.5 271/01.9 312/01.3 291/01.6 294/00.7 016/00.9 076/01.1 058/02.4 039/02.5 047/03.2
18 178/01.1 233/02.3 260/01.8 352/00.7 245/02.2 264/01.5 206/01.9 034/00.6 031/01.2 112/01.9 044/02.1 046/03.2 034/03.9
19 223/02.6 232/03.2 217/02.1 217/01.7 218/01.9 215/02.2 227/02.4 187/01.5 048/01.0 064/01.7 066/02.1 052/01.8 043/02.4
20 221/02.2 228/01.8 221/02.8 223/02.6 214/01.9 262/00.9 209/02.2 164/01.2 046/00.8 067/01.6 026/01.9 033/02.8 041/02.1
21 258/01.5 235/02.4 251/01.5 230/01.3 232/02.2 309/01.4 224/02.5 233/02.7 313/01.2 041/01.4 039/02.2 028/02.4 059/02.3
22 225/04.1 219/03.8 216/04.2 220/04.1 226/04.2 223/04.0 214/04.5 194/06.1 175/05.4 176/06.0 175/05.9 170/05.9 177/06.5
23 194/04.3 184/04.8 211/04.4 218/04.4 219/02.9 187/01.9 199/02.8 239/02.3 033/01.3 123/02.0 082/02.6 046/03.2 055/02.8
24 152/01.5 207/02.3 127/00.9 215/01.2 185/01.6 268/00.9 298/01.2 102/01.4 159/00.6 123/01.8 102/02.6 075/02.3 080/01.4
25 170/04.1 123/02.1 154/01.4 188/01.7 200/04.9 024/01.6 210/03.9 191/05.9 189/10.4 182/08.8 167/08.7 173/07.9 166/08.7
26 129/01.0 205/01.2 118/01.2 058/02.6 296/06.4 313/08.6 354/04.9 352/05.9 349/05.1 007/03.9 297/03.1 319/03.8 315/05.0
27 199/02.3 215/03.4 213/04.4 195/03.8 215/02.4 188/05.6 190/05.1 176/03.7 159/03.7 147/04.1 137/03.7 036/02.6 052/02.1
28 101/01.2 172/02.0 173/02.2 166/02.4 164/02.0 167/01.7 157/01.8 151/01.1 076/01.7 014/04.3 348/06.2 313/06.9 307/08.0
29 313/05.9 323/06.2 338/04.3 316/02.6 311/03.8 189/02.0 163/01.9 142/01.3 095/01.6 054/02.0 027/02.7 019/04.5 014/04.7
30 232/03.1 221/03.1 226/03.2 231/03.2 240/01.7 230/02.1 218/02.0 219/01.5 015/01.1 050/01.9 036/01.9 044/02.3 070/02.3
31 250/01.5 214/02.4 219/02.5 221/01.8 240/01.7 217/01.7 230/01.4 259/01.2 358/00.9 069/01.6 080/01.7 050/02.1 039/02.1
MEAN 217/02.8 215/03.0 216/02.8 229/02.7 236/03.0 244/02.9 224/03.0 204/02.7 084/02.9 093/03.4 077/03.7 053/03.9 053/04.1
MAX 193/06.5 189/06.8 194/06.6 217/05.8 181/09.8 313/08.6 175/06.9 169/08.5 189/10.4 173/12.0 178/12.2 181/11.7 183/11.1
MIN 129/01.0 205/01.2 127/00.9 352/00.7 308/01.0 268/00.9 017/00.8 113/00.5 159/00.6 076/01.1 049/01.4 039/01.7 080/01.4
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country Page 2
Wind Speed and Direction in mps for October, 2023
Hr Beg 13 14 15 16 17 18 19 20 21 22 23
Hr End 14 15 16 17 18 19 20 21 22 23 24
Day MEAN MAX SPD MIN SPD
1 182/09.3 184/07.7 192/05.7 200/04.2 176/05.9 215/02.9 219/03.8 197/03.1 204/02.5 221/02.6 212/03.7 190/06.7 178/12.2 204/02.5
2 072/02.7 038/01.8 317/00.8 160/01.5 191/02.1 223/02.3 224/03.7 222/04.0 197/03.1 220/04.0 196/01.9 202/03.0 176/05.0 317/00.8
3 045/01.7 025/02.6 053/02.2 046/01.4 069/01.1 141/00.9 157/00.8 250/00.9 236/01.6 221/01.5 227/01.7 181/02.0 213/03.9 157/00.8
4 041/02.4 022/03.6 018/02.7 015/02.2 005/03.0 102/01.0 354/00.9 243/02.6 198/01.7 240/03.3 274/01.3 354/01.9 022/03.6 320/00.8
5 048/02.8 033/03.2 027/03.4 027/02.8 033/01.9 260/01.4 237/02.1 302/01.5 301/01.5 276/01.6 280/01.5 328/01.9 027/03.4 308/01.0
6 042/03.5 059/03.1 028/03.2 022/03.6 011/02.8 275/01.7 290/01.8 259/02.1 224/02.4 219/03.0 226/03.7 341/02.6 005/03.7 331/00.7
7 053/02.3 042/02.0 068/02.0 039/02.6 005/01.7 225/01.6 240/01.8 229/02.8 228/02.1 223/01.5 229/02.9 238/02.1 229/02.9 249/01.1
8 048/02.8 033/02.4 049/02.3 032/02.4 304/01.9 235/01.4 235/03.1 230/04.1 228/04.0 228/04.1 226/04.5 239/02.7 226/04.5 113/00.5
9 148/04.6 140/03.2 078/01.8 004/01.2 252/02.5 228/03.8 227/04.1 226/04.7 227/04.5 224/05.1 227/04.3 201/03.8 224/05.1 004/01.2
10 193/06.5 202/05.1 212/04.5 236/03.6 179/02.8 172/02.3 188/02.8 195/01.8 246/02.1 218/03.1 247/02.7 203/04.8 165/07.8 195/01.8
11 308/07.4 346/04.0 353/04.9 352/05.3 355/05.5 040/04.2 046/02.6 017/03.2 349/05.3 020/03.9 023/03.3 353/04.3 317/07.4 173/02.1
12 032/02.5 344/02.5 086/01.6 325/02.9 360/02.4 241/01.6 314/01.6 346/02.2 317/02.4 006/02.5 272/01.4 003/02.0 011/03.2 128/01.3
13 147/05.1 163/04.3 156/03.4 172/02.7 217/03.3 229/04.0 223/03.9 204/03.1 224/04.3 214/04.2 223/04.3 196/03.9 155/06.0 243/01.6
14 137/03.4 148/03.1 137/02.7 085/02.0 266/02.1 223/03.5 209/02.6 238/02.8 247/02.3 232/01.7 222/03.4 203/03.7 208/06.7 223/01.1
15 041/02.2 043/02.3 039/02.2 038/01.6 274/01.6 235/02.6 222/02.1 212/00.9 210/02.1 228/03.3 229/03.7 236/02.1 229/03.7 022/00.9
16 073/02.8 040/02.3 035/01.9 096/01.5 213/02.3 227/04.1 211/03.2 224/04.4 222/04.1 217/03.4 222/01.8 201/03.4 171/06.7 096/01.5
17 041/03.3 044/02.7 029/02.6 030/01.4 209/01.2 216/01.1 278/01.8 247/01.7 257/01.4 284/03.2 284/02.8 298/02.2 208/05.1 294/00.7
18 032/03.8 038/03.3 041/01.9 027/01.7 334/01.3 243/01.8 319/01.5 240/01.9 219/03.3 230/03.1 230/02.1 317/02.1 034/03.9 034/00.6
19 047/02.2 029/02.0 019/01.7 039/01.4 226/01.0 224/02.1 224/01.6 230/02.8 220/03.4 243/01.1 251/01.3 221/02.0 220/03.4 226/01.0
20 053/01.8 046/01.8 031/01.5 053/01.0 203/01.7 215/01.7 242/02.1 222/01.7 216/02.5 213/02.0 212/02.5 208/01.9 033/02.8 046/00.8
21 049/02.2 051/02.2 038/02.3 041/02.2 214/01.7 218/03.3 198/01.9 224/02.2 227/01.7 228/01.8 221/03.5 252/02.1 221/03.5 313/01.2
22 163/05.3 157/05.5 164/04.8 168/04.9 184/04.1 201/04.5 216/04.7 220/04.8 204/04.1 213/04.3 211/04.1 196/04.8 177/06.5 219/03.8
23 032/03.5 017/02.7 135/02.0 018/02.5 288/03.2 354/02.4 349/02.2 304/01.8 286/01.9 304/01.8 177/01.6 254/02.7 184/04.8 033/01.3
24 111/02.2 013/03.4 021/01.9 016/01.2 220/03.6 222/04.1 223/03.5 222/04.4 208/04.3 191/05.5 179/05.6 168/02.5 179/05.6 159/00.6
25 178/07.7 198/07.1 191/06.4 179/07.1 174/07.9 177/09.3 173/08.1 296/03.7 066/02.9 136/02.1 100/01.6 171/05.6 189/10.4 154/01.4
26 314/05.9 348/02.3 011/02.2 026/03.7 349/02.5 243/02.1 234/02.5 229/03.8 224/04.3 224/04.3 222/04.2 311/03.8 313/08.6 129/01.0
27 023/02.2 065/02.2 045/02.2 026/01.9 308/00.8 228/01.0 213/02.2 319/01.6 301/01.5 321/01.3 327/01.3 208/02.7 188/05.6 308/00.8
28 310/07.7 307/07.3 311/07.2 321/06.8 321/07.1 315/07.8 306/06.4 330/06.2 340/08.3 336/05.7 317/05.5 316/04.9 340/08.3 151/01.1
29 023/04.7 036/04.3 039/03.6 024/03.2 357/03.1 331/02.7 318/02.0 316/01.8 269/01.3 256/02.2 249/02.5 347/03.1 323/06.2 142/01.3
30 044/02.6 044/02.7 026/03.0 017/02.0 018/01.3 171/00.9 266/02.1 289/01.8 234/02.3 231/03.8 226/02.2 266/02.3 231/03.8 171/00.9
31 047/01.8 061/01.9 057/01.7 104/01.1 214/00.8 206/02.3 200/02.4 245/02.3 223/02.0 206/02.1 204/01.5 207/01.8 219/02.5 214/00.8
MEAN 057/03.8 044/03.4 047/02.9 037/02.7 273/02.7 225/02.8 239/02.8 249/02.8 238/02.9 235/03.0 233/02.9 224/03.1
MAX 182/09.3 184/07.7 311/07.2 179/07.1 174/07.9 177/09.3 173/08.1 330/06.2 340/08.3 336/05.7 179/05.6 178/12.2
MIN 045/01.7 038/01.8 317/00.8 053/01.0 214/00.8 171/00.9 157/00.8 250/00.9 269/01.3 243/01.1 274/01.3 113/00.5
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE = 100.0%
MONTHLY MEAN = 224/03.1 MAXIMUM WIND SPEED =12.2 AT 178 DEGREES DATE OF OCCURRENCE = 10/1 AT 1100
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country Page 1
Wind Speed and Direction in mps for November, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13
Day
1 237/02.0 228/02.2 248/02.4 261/01.8 236/02.0 283/01.8 227/03.0 230/01.6 166/02.8 ------060/01.9 041/02.2
2 232/03.7 277/01.4 228/02.8 228/02.8 218/03.1 201/02.9 199/02.2 360/01.1 110/00.8 044/01.2 158/02.7 167/05.3 171/04.4
3 136/01.1 207/02.7 314/01.8 201/02.2 281/02.4 273/02.4 275/02.3 203/02.0 172/01.5 038/01.8 096/02.3 039/02.7 046/02.4
4 226/04.1 227/03.3 216/03.4 224/03.7 225/05.1 221/05.4 208/04.6 200/03.5 046/01.8 106/01.7 171/04.5 171/05.4 137/04.3
5 176/09.4 175/09.5 186/07.8 177/06.9 175/06.7 180/06.8 206/03.9 301/04.3 009/03.5 091/02.1 090/01.3 120/01.7 072/01.2
6 187/06.4 189/05.4 183/05.8 176/04.9 178/05.9 176/06.5 180/06.6 195/04.2 185/04.7 188/05.4 167/07.4 182/06.2 196/07.0
7 356/08.5 005/05.8 008/05.0 009/05.4 022/04.0 011/04.2 012/03.7 011/03.8 340/02.0 004/02.9 346/05.1 062/02.5 242/02.5
8 341/07.2 347/06.9 352/06.7 346/07.5 351/06.1 357/04.8 003/03.1 014/03.1 026/03.4 020/04.2 006/04.4 005/05.0 005/04.5
9 341/02.0 323/01.5 299/02.0 289/01.6 300/00.8 263/01.2 233/01.6 270/02.0 338/01.4 054/01.6 044/02.2 048/01.9 045/02.2
10 234/02.4 230/02.8 215/03.6 224/03.3 249/01.8 237/02.7 228/03.3 235/02.8 300/01.2 162/02.2 177/03.7 120/02.8 087/02.1
11 229/03.8 216/03.9 227/03.7 354/02.2 177/01.3 215/02.6 228/03.2 221/03.0 194/02.0 202/03.0 183/02.6 148/04.5 132/03.0
12 216/04.8 221/04.4 226/03.5 225/03.8 237/02.5 232/02.4 234/03.3 230/02.7 180/03.1 166/04.4 164/04.5 145/04.6 150/04.4
13 191/08.7 192/07.8 186/08.9 189/08.5 189/07.6 209/05.3 221/03.9 209/04.5 248/02.5 182/07.8 178/09.2 178/09.2 176/07.3
14 194/05.1 210/03.4 225/03.2 207/04.8 187/06.8 184/06.8 186/07.7 200/07.2 184/07.5 177/08.6 169/08.1 165/07.3 166/06.0
15 189/07.3 189/05.8 227/02.1 184/02.8 287/02.4 132/01.7 163/02.9 289/01.1 312/01.3 175/04.4 145/06.6 160/08.2 161/07.7
16 164/06.7 178/06.8 179/05.1 180/06.9 195/04.8 225/03.6 248/05.2 205/02.6 221/02.5 188/01.9 088/02.1 054/02.1 097/01.9
17 230/04.3 228/04.9 228/03.5 234/02.9 235/02.9 227/03.6 244/01.3 136/00.7 166/01.5 174/04.3 148/03.3 135/04.0 148/03.3
18 190/04.0 212/03.0 235/02.3 235/03.5 210/05.1 193/07.4 196/06.5 198/05.3 195/04.8 186/04.0 170/05.4 174/05.2 178/04.8
19 189/07.3 194/06.5 193/07.6 183/08.0 195/05.0 188/04.2 199/04.4 271/02.7 303/06.3 323/06.7 346/04.8 023/03.1 326/06.9
20 007/05.9 003/06.2 008/05.7 360/04.0 335/06.4 326/07.2 327/07.5 319/05.8 320/07.1 350/04.9 003/03.8 355/03.8 003/03.2
21 327/02.0 285/01.3 224/02.5 235/02.9 230/02.7 223/02.4 226/03.4 224/03.1 189/01.7 064/01.8 060/01.8 058/01.9 045/01.5
22 214/03.0 242/01.9 257/01.4 047/01.0 171/01.5 179/01.8 250/01.8 224/02.5 198/01.4 021/01.3 018/02.1 012/02.0 042/02.0
23 219/02.8 311/01.6 236/02.3 206/02.3 249/01.9 007/02.0 245/01.5 203/01.3 003/01.2 197/01.4 076/01.5 003/01.1 034/02.4
24 025/00.2 030/01.1 033/01.2 015/02.7 021/03.3 014/04.2 013/04.2 008/04.0 004/03.3 010/03.7 019/02.2 359/02.2 019/03.4
25 005/04.1 347/03.6 086/01.2 105/01.6 145/01.3 125/01.7 170/02.2 153/02.2 161/02.5 151/03.3 120/02.3 050/02.1 077/02.3
26 058/00.7 082/00.8 228/01.0 217/00.6 045/00.5 304/00.3 220/01.2 218/01.8 233/01.6 042/01.6 112/01.8 044/01.6 040/02.1
27 230/02.9 241/02.7 233/02.7 224/02.2 223/01.6 217/01.8 289/01.4 317/01.0 268/00.9 083/01.3 062/01.7 060/01.6 042/01.5
28 174/00.7 141/01.7 257/01.9 220/01.4 287/01.1 261/01.0 118/00.7 181/01.0 175/00.7 126/01.5 051/01.2 016/01.2 046/01.7
29 150/01.1 145/01.7 172/01.9 243/01.4 187/02.4 161/01.8 006/01.4 253/01.4 353/01.3 358/01.3 014/01.2 027/01.3 058/01.3
30 187/01.6 003/01.4 360/01.8 348/01.2 173/01.3 338/01.4 343/01.6 316/01.3 246/01.7 348/01.1 346/00.9 031/01.2 045/01.6
MEAN 210/04.1 230/03.7 233/03.5 226/03.5 223/03.3 227/03.4 231/03.3 238/02.8 234/02.6 101/03.2 095/03.5 075/03.5 079/03.4
MAX 176/09.4 175/09.5 186/08.9 189/08.5 189/07.6 193/07.4 186/07.7 200/07.2 184/07.5 177/08.6 178/09.2 178/09.2 161/07.7
MIN 025/00.2 082/00.8 228/01.0 217/00.6 045/00.5 304/00.3 118/00.7 136/00.7 175/00.7 348/01.1 346/00.9 003/01.1 072/01.2
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country Page 2
Wind Speed and Direction in mps for November, 2023
Hr Beg 13 14 15 16 17 18 19 20 21 22 23
Hr End 14 15 16 17 18 19 20 21 22 23 24
Day MEAN MAX SPD MIN SPD
1 055/02.2 057/01.8 088/01.7 028/01.7 235/01.1 226/01.8 155/00.8 222/03.2 215/01.5 218/03.1 239/02.8 223/02.1 222/03.2 155/00.8
2 149/03.4 142/02.9 043/02.2 044/01.1 225/03.5 218/02.8 218/03.4 222/04.3 227/02.0 239/02.2 328/02.0 205/02.7 167/05.3 110/00.8
3 038/02.6 046/02.2 068/01.7 023/02.6 303/02.5 226/03.8 228/03.8 229/04.3 228/04.4 223/04.3 217/04.6 238/02.7 217/04.6 136/01.1
4 159/03.1 164/03.3 176/03.6 182/02.8 177/04.2 164/04.3 166/04.7 199/03.5 188/03.9 190/06.5 181/07.1 185/04.1 181/07.1 106/01.7
5 077/01.3 150/02.5 085/01.7 031/01.2 231/03.7 230/03.4 215/04.0 188/04.9 185/05.6 198/05.0 188/06.4 165/04.4 175/09.5 031/01.2
6 218/05.6 218/04.6 193/04.7 188/05.0 179/04.9 188/05.7 222/05.5 290/05.9 235/03.7 055/05.4 356/07.6 193/05.6 356/07.6 235/03.7
7 057/02.1 040/01.0 181/02.1 184/02.9 213/01.9 318/04.1 008/01.1 081/02.0 352/06.2 340/07.1 340/07.6 005/03.9 356/08.5 040/01.0
8 024/04.5 003/04.6 360/04.5 324/03.5 326/03.5 336/02.9 327/02.8 321/02.7 329/02.8 329/02.5 317/03.0 350/04.3 346/07.5 329/02.5
9 044/02.5 027/02.8 019/02.4 014/01.6 247/01.3 231/01.8 230/01.7 229/02.8 227/03.3 222/02.3 225/02.9 304/02.0 227/03.3 300/00.8
10 034/02.1 038/01.9 029/02.0 039/01.2 219/01.4 205/01.8 207/02.2 227/03.3 226/03.3 229/02.6 232/03.0 219/02.5 177/03.7 300/01.2
11 031/03.0 017/03.0 010/01.4 290/01.4 221/02.7 222/03.3 225/03.9 221/04.8 213/05.0 203/05.5 212/05.6 214/03.3 212/05.6 177/01.3
12 158/05.0 160/04.9 168/04.2 212/03.2 329/01.5 319/01.1 183/05.4 178/05.6 175/05.0 188/07.8 181/08.5 197/04.2 181/08.5 319/01.1
13 166/06.7 164/06.8 179/05.0 205/04.8 207/05.4 203/06.0 195/06.0 183/05.9 187/06.4 179/05.7 183/05.6 191/06.5 178/09.2 248/02.5
14 186/05.7 178/04.8 185/04.2 206/03.7 225/04.9 226/04.4 206/01.9 212/02.5 223/02.7 209/04.0 182/05.1 195/05.3 177/08.6 206/01.9
15 154/06.3 165/08.0 176/06.7 187/07.6 191/08.8 194/11.2 182/07.8 171/06.0 174/05.2 175/05.4 173/06.1 182/05.6 194/11.2 289/01.1
16 022/02.0 043/01.7 340/00.9 010/00.8 206/01.5 262/02.0 242/03.3 229/03.9 234/03.1 233/02.6 228/01.2 208/03.1 180/06.9 010/00.8
17 026/03.1 019/03.1 046/02.0 053/01.1 209/01.9 209/02.8 226/03.4 224/03.5 225/04.2 222/04.6 213/04.8 202/03.1 228/04.9 136/00.7
18 182/04.3 214/04.2 155/01.9 023/01.5 156/01.5 179/02.8 175/04.0 180/02.2 176/01.4 177/04.7 190/06.2 188/04.0 193/07.4 176/01.4
19 314/07.3 294/08.4 295/10.9 303/11.1 309/10.9 323/08.5 335/07.8 357/06.1 002/07.6 006/06.5 005/06.0 301/06.9 303/11.1 271/02.7
20 002/03.8 344/03.7 359/04.5 016/03.6 324/02.1 318/03.4 354/02.1 133/00.9 341/02.5 320/02.2 313/02.1 346/04.3 327/07.5 133/00.9
21 031/01.5 042/02.0 035/01.3 003/01.8 210/02.8 223/02.3 232/02.0 335/01.5 043/00.6 169/01.2 205/02.5 254/02.0 226/03.4 043/00.6
22 045/01.7 061/01.5 077/01.2 083/00.9 176/00.9 139/01.3 036/00.7 182/01.8 185/01.7 197/01.3 237/01.6 158/01.6 214/03.0 036/00.7
23 034/02.8 044/02.6 039/02.7 042/01.1 312/01.6 069/01.0 144/01.2 260/00.7 ---208/00.9 123/00.3 335/01.7 219/02.8 123/00.3
24 025/03.1 031/02.4 042/02.1 033/02.3 017/03.3 040/01.6 345/02.1 342/03.2 007/03.4 019/03.9 018/03.9 017/02.8 014/04.2 025/00.2
25 331/03.7 323/04.2 336/03.8 314/05.0 308/04.4 077/01.9 214/01.1 268/01.1 237/00.5 193/01.2 210/01.0 134/02.4 314/05.0 237/00.5
26 027/02.0 043/01.8 075/01.7 118/01.2 227/00.5 200/01.7 221/01.5 252/01.4 239/02.4 235/02.6 228/03.0 197/01.5 228/03.0 304/00.3
27 019/01.8 023/01.6 047/01.4 096/00.8 215/00.3 191/01.1 068/00.7 211/01.4 104/01.1 231/01.1 254/01.0 228/01.5 230/02.9 215/00.3
28 054/01.5 041/01.2 068/01.2 076/00.9 115/00.9 188/01.4 179/01.0 202/01.0 182/02.8 193/03.6 138/02.3 147/01.4 193/03.6 118/00.7
29 073/01.5 060/01.7 072/01.4 065/01.0 193/00.9 138/00.7 218/00.9 324/01.2 057/01.0 154/01.0 179/01.3 106/01.3 187/02.4 138/00.7
30 032/01.6 007/01.2 057/01.4 138/00.9 127/01.3 081/01.1 166/00.9 201/01.3 195/01.3 201/01.6 220/01.2 015/01.3 360/01.8 138/00.9
MEAN 051/03.3 049/03.2 063/02.9 045/02.6 226/02.9 211/03.1 210/02.9 224/03.1 214/03.3 211/03.6 218/03.9 207/03.3
MAX 314/07.3 294/08.4 295/10.9 303/11.1 309/10.9 194/11.2 335/07.8 357/06.1 002/07.6 188/07.8 181/08.5 194/11.2
MIN 077/01.3 040/01.0 340/00.9 010/00.8 215/00.3 138/00.7 068/00.7 260/00.7 237/00.5 208/00.9 123/00.3 025/00.2
POSSIBLE NUMBER OF OBSERVATIONS =720 ACTUAL NUMBER OF OBSERVATIONS =717 DATA RECOVERY RATE = 99.6%
MONTHLY MEAN = 207/03.3 MAXIMUM WIND SPEED =11.2 AT 194 DEGREES DATE OF OCCURRENCE = 11/15 AT 1900
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country Page 1
Wind Speed and Direction in mps for December, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13
Day
1 214/01.3 220/03.8 211/03.1 021/01.4 056/00.6 215/01.5 196/02.3 220/03.8 204/03.0 188/03.8 181/04.4 182/05.3 177/04.0
2 015/02.8 283/05.0 326/05.5 332/07.5 321/06.6 057/02.7 168/02.5 224/01.3 192/03.8 186/04.7 182/07.8 188/09.9 176/09.3
3 264/06.2 243/04.4 175/04.7 207/03.8 140/01.6 180/04.3 173/05.1 189/02.3 207/02.1 208/02.0 203/02.7 211/02.8 216/02.7
4 311/07.0 345/03.5 080/01.6 155/01.6 201/01.9 250/01.9 199/02.2 227/02.4 219/03.5 183/03.7 166/04.7 184/04.8 186/03.6
5 230/03.5 227/02.7 235/03.0 239/03.6 261/02.4 236/02.6 229/03.8 239/01.9 191/01.0 190/01.5 160/02.2 154/03.1 153/03.5
6 252/02.5 199/08.0 189/10.1 188/10.5 188/10.2 186/08.5 184/07.6 198/08.2 199/08.0 200/06.9 166/06.6 163/06.2 161/07.1
7 196/13.4 195/10.6 197/07.9 226/03.8 234/04.0 273/07.5 301/07.1 287/10.6 288/11.9 285/11.8 281/09.5 300/08.1 314/04.2
8 229/02.2 293/03.3 276/05.2 290/05.0 300/10.5 312/10.1 294/14.4 303/10.5 295/07.3 318/05.0 325/06.6 306/06.4 303/09.1
9 351/04.1 334/03.5 329/02.3 304/03.2 340/03.2 338/03.0 341/02.3 235/02.7 338/01.5 010/01.3 089/01.7 082/01.9 100/01.8
10 201/06.0 191/07.7 193/06.1 230/02.8 305/01.6 194/06.0 203/05.5 198/04.3 206/02.7 184/05.1 170/04.0 023/02.7 015/02.0
11 041/01.6 358/01.4 003/01.6 150/01.2 168/01.0 193/01.9 157/01.3 191/02.0 228/01.8 057/01.2 055/00.9 049/01.6 020/01.5
12 198/01.3 196/01.2 101/01.0 345/01.4 302/00.8 094/00.8 213/00.9 234/01.0 044/00.9 053/01.0 005/01.4 030/01.9 036/02.9
13 318/02.9 321/02.2 326/04.3 335/05.7 334/06.0 332/06.5 328/05.7 334/03.3 279/01.4 026/00.9 006/04.8 016/03.5 019/02.6
14 331/01.6 247/01.6 001/01.0 352/01.3 326/01.3 020/01.1 207/00.8 195/01.1 287/00.7 100/01.1 092/01.7 043/02.2 022/03.1
15 232/02.6 237/01.8 357/02.3 159/00.8 171/01.1 213/01.7 202/02.2 173/01.2 236/01.2 107/01.3 056/01.5 032/01.4 028/01.7
16 215/02.0 305/01.8 228/01.8 286/01.4 293/01.8 209/01.9 222/01.5 209/02.0 157/01.2 055/01.1 032/01.4 029/01.3 038/01.8
17 204/02.2 209/01.6 204/02.1 172/01.7 139/00.9 249/01.3 345/01.3 308/01.7 189/01.9 139/01.3 061/01.5 064/01.4 025/01.7
18 188/01.7 333/01.0 177/01.3 161/03.1 159/02.3 163/02.7 175/03.3 130/02.0 177/02.9 203/05.5 138/03.7 068/03.0 038/02.3
19 156/03.7 221/04.2 194/08.5 190/09.0 185/07.4 191/07.7 193/08.2 219/04.0 177/08.1 189/06.4 192/04.0 191/05.1 189/08.5
20 151/02.4 228/02.2 192/02.9 204/03.9 191/05.9 190/06.3 187/05.1 198/04.9 195/04.7 194/04.7 173/05.0 174/05.8 170/06.1
21 233/04.4 205/06.6 197/05.9 190/06.8 197/06.5 212/04.8 237/02.4 216/03.6 212/03.9 190/05.2 191/07.9 178/07.8 173/07.6
22 211/02.7 205/03.1 203/05.3 206/05.3 206/03.2 193/04.1 175/02.6 164/01.9 160/02.5 148/03.9 174/07.3 173/07.7 178/05.5
23 181/02.5 176/02.4 204/03.8 211/04.7 194/06.1 357/03.8 100/02.1 304/04.4 343/04.8 326/07.3 333/06.3 334/06.9 344/06.6
24 316/05.0 304/03.8 352/02.3 187/02.1 298/02.7 225/01.7 141/01.3 167/01.5 018/02.1 106/02.1 070/02.4 035/02.4 050/02.3
25 225/03.6 223/02.4 264/01.8 233/02.6 227/03.9 242/03.0 325/01.5 350/00.8 296/00.9 015/01.2 057/02.2 053/02.3 039/02.4
26 230/00.7 278/00.9 236/02.1 228/03.7 229/01.9 339/02.1 247/02.1 228/02.3 227/02.7 037/01.6 006/01.4 016/01.9 026/02.4
27 174/01.3 358/01.1 185/01.6 222/01.3 182/01.2 295/01.1 220/01.1 230/00.9 281/00.8 048/01.3 055/01.7 077/01.9 062/02.2
28 337/02.0 341/01.9 226/01.0 298/01.0 249/00.7 207/01.9 348/01.9 298/01.1 144/00.9 024/00.9 010/01.4 018/01.8 022/01.6
29 227/02.0 091/01.2 150/00.8 191/01.8 215/01.8 219/02.8 251/01.7 270/01.4 080/01.0 121/01.2 066/01.2 056/01.2 037/01.9
30 182/06.0 187/06.7 168/04.9 171/03.9 196/04.1 203/06.8 200/07.5 195/08.3 198/07.8 194/05.2 190/04.3 187/04.0 180/02.9
31 220/03.6 217/04.3 244/02.9 268/02.2 239/01.4 237/01.9 189/01.2 224/03.2 177/01.8 004/01.6 034/01.6 041/01.5 027/01.9
MEAN 228/03.4 248/03.4 217/03.5 223/03.5 227/03.4 227/03.7 213/03.5 226/03.3 217/03.2 131/03.3 100/03.7 071/03.8 058/03.8
MAX 196/13.4 195/10.6 189/10.1 188/10.5 300/10.5 312/10.1 294/14.4 287/10.6 288/11.9 285/11.8 281/09.5 188/09.9 176/09.3
MIN 230/00.7 278/00.9 150/00.8 159/00.8 056/00.6 094/00.8 207/00.8 350/00.8 287/00.7 024/00.9 055/00.9 056/01.2 020/01.5
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country Page 2
Wind Speed and Direction in mps for December, 2023
Hr Beg 13 14 15 16 17 18 19 20 21 22 23
Hr End 14 15 16 17 18 19 20 21 22 23 24
Day MEAN MAX SPD MIN SPD
1 187/01.9 352/04.0 034/02.9 042/01.3 169/01.3 214/02.0 181/02.6 192/02.0 184/02.5 245/03.1 256/04.2 199/02.8 182/05.3 056/00.6
2 169/08.6 169/08.8 169/07.5 176/07.2 182/08.6 205/04.6 235/04.8 244/05.3 240/05.1 244/04.6 219/05.2 210/05.8 188/09.9 224/01.3
3 213/02.6 278/01.5 216/02.7 232/02.4 230/01.2 200/01.6 239/01.7 237/01.8 221/01.6 203/01.6 314/05.0 215/02.9 264/06.2 230/01.2
4 155/02.4 137/02.1 225/01.1 228/02.5 227/03.7 230/04.2 232/03.3 219/02.5 220/04.2 228/03.6 231/04.0 209/03.2 311/07.0 225/01.1
5 065/02.5 049/01.7 066/01.1 236/02.4 216/02.0 231/02.1 222/01.9 208/02.6 225/02.1 247/01.6 215/02.3 214/02.4 229/03.8 191/01.0
6 148/07.3 180/07.2 192/09.9 190/10.2 183/07.9 191/07.5 184/08.1 171/09.4 173/07.9 182/12.1 185/12.9 185/08.4 185/12.9 252/02.5
7 330/06.0 027/03.1 353/01.4 349/01.2 270/02.2 209/02.9 212/01.9 210/03.3 197/02.3 203/03.8 176/02.6 257/05.9 196/13.4 349/01.2
8 300/12.3 315/12.3 322/12.5 324/13.7 328/10.1 327/09.7 324/08.5 357/06.0 326/03.1 344/02.3 327/02.6 311/07.9 294/14.4 229/02.2
9 041/01.5 242/01.2 225/01.4 222/02.6 222/03.6 220/03.3 218/03.5 219/03.3 224/03.2 211/05.1 204/05.9 276/02.8 204/05.9 242/01.2
10 078/01.3 018/02.1 344/01.5 187/01.6 190/02.1 242/02.0 200/02.1 352/01.3 244/02.2 341/02.1 230/02.7 218/03.2 191/07.7 352/01.3
11 036/01.7 038/01.4 053/01.6 036/00.9 214/00.7 021/00.5 237/01.3 149/01.8 149/01.3 227/02.0 071/01.1 085/01.4 191/02.0 021/00.5
12 054/02.7 046/02.7 070/01.9 360/04.1 352/04.8 352/04.5 345/05.5 335/03.6 312/03.1 254/02.6 283/01.7 003/02.2 345/05.5 094/00.8
13 019/02.6 017/02.4 021/03.1 351/01.9 261/01.6 337/02.2 329/01.3 325/01.2 254/01.2 292/01.4 350/01.1 337/02.9 332/06.5 026/00.9
14 041/02.2 056/01.4 088/01.6 187/01.5 180/01.1 217/01.7 328/01.2 288/00.8 214/01.1 207/01.7 217/03.1 308/01.5 022/03.1 287/00.7
15 031/01.6 019/01.2 043/01.7 080/00.9 175/01.3 239/00.8 185/00.7 217/02.1 203/02.7 208/01.5 261/02.0 188/01.6 203/02.7 185/00.7
16 063/01.2 057/01.2 090/01.0 082/01.1 335/00.9 337/01.1 281/00.8 278/01.2 297/01.4 245/01.6 190/01.7 295/01.4 215/02.0 281/00.8
17 048/01.6 043/01.3 028/00.8 201/01.0 226/01.3 228/01.1 242/01.6 208/01.5 197/01.8 185/01.9 133/01.1 186/01.5 204/02.2 028/00.8
18 038/01.6 060/02.4 350/01.7 155/03.7 189/06.7 148/04.0 160/02.2 080/02.1 112/01.9 175/03.5 158/03.8 143/02.9 189/06.7 333/01.0
19 179/05.4 169/05.3 163/03.6 183/03.6 208/04.7 201/05.2 200/04.6 184/04.5 176/02.5 205/06.8 208/03.9 190/05.6 190/09.0 176/02.5
20 187/06.1 181/06.3 186/04.8 182/03.2 233/03.4 227/04.3 224/04.5 224/04.2 214/03.6 204/02.6 218/03.2 197/04.4 181/06.3 228/02.2
21 173/05.6 133/02.3 005/01.7 293/01.6 236/02.6 243/02.1 220/02.3 215/02.1 232/01.5 241/02.1 190/02.1 210/04.1 191/07.9 232/01.5
22 191/05.8 182/05.3 181/05.5 201/04.5 213/03.5 186/02.7 213/03.0 227/02.5 092/01.3 289/00.8 083/00.8 187/03.8 173/07.7 289/00.8
23 330/05.8 327/04.7 332/05.2 341/04.9 339/04.8 349/04.2 010/04.4 003/05.4 360/04.0 333/04.4 317/05.7 331/04.8 326/07.3 100/02.1
24 048/02.7 028/03.2 012/03.6 011/02.5 231/00.9 262/01.6 230/02.5 231/01.5 233/02.7 226/03.4 225/03.5 293/02.5 316/05.0 231/00.9
25 050/02.8 042/02.4 030/02.4 026/02.4 335/01.2 227/01.4 216/02.0 206/02.5 202/01.8 221/01.1 228/00.9 282/02.1 227/03.9 350/00.8
26 056/01.6 085/01.5 046/01.6 070/01.3 221/00.8 034/00.6 134/00.6 127/01.3 168/01.1 199/01.2 085/01.1 158/01.6 228/03.7 034/00.6
27 069/02.0 074/01.9 047/01.1 072/01.4 161/01.1 177/01.5 126/00.7 219/03.1 229/02.6 254/01.6 352/01.6 152/01.5 219/03.1 126/00.7
28 052/02.1 041/02.2 054/01.6 199/02.0 225/04.6 231/02.3 044/01.1 200/01.7 221/02.6 320/01.5 247/01.8 312/01.7 225/04.6 249/00.7
29 028/01.5 030/01.4 022/00.8 352/00.9 185/01.6 208/00.9 189/03.0 197/06.1 201/04.9 188/05.4 195/04.6 170/02.1 197/06.1 022/00.8
30 180/06.8 168/05.7 140/02.6 161/02.8 203/02.3 178/01.4 225/04.0 214/03.6 191/01.9 193/02.7 217/04.2 189/04.6 195/08.3 178/01.4
31 038/01.9 044/01.7 043/01.3 074/01.1 204/01.6 233/02.4 219/02.6 226/02.8 216/02.7 194/02.0 223/01.7 223/02.1 217/04.3 074/01.1
MEAN 068/03.6 054/03.3 045/02.9 165/03.0 220/03.0 229/02.8 222/02.8 222/03.0 214/02.6 229/03.0 222/03.2 216/03.3
MAX 300/12.3 315/12.3 322/12.5 324/13.7 328/10.1 327/09.7 324/08.5 171/09.4 173/07.9 182/12.1 185/12.9 294/14.4
MIN 063/01.2 019/01.2 022/00.8 036/00.9 214/00.7 021/00.5 134/00.6 288/00.8 214/01.1 289/00.8 083/00.8 021/00.5
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE = 100.0%
MONTHLY MEAN = 216/03.3 MAXIMUM WIND SPEED =14.4 AT 294 DEGREES DATE OF OCCURRENCE = 12/8 AT 700
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country
Joint Frequency Distribution for October, 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 0.7 1.5 0.8 0.7 0.0 0.0 3.6 3.1
NNE 11.25 - 33.75 1.2 4.2 2.8 0.0 0.0 0.0 8.2 2.6
NE 33.75 - 56.25 1.3 8.1 1.3 0.0 0.0 0.0 10.8 2.3
ENE 56.25 - 78.75 0.7 3.4 0.1 0.0 0.0 0.0 4.2 2.0
E 78.75 - 101.25 0.4 0.8 0.0 0.0 0.0 0.0 1.2 1.7
ESE 101.25 - 123.75 0.7 0.9 0.1 0.0 0.0 0.0 1.7 1.8
SE 123.75 - 146.25 0.8 0.8 0.4 0.0 0.0 0.0 2.0 2.0
SSE 146.25 - 168.75 0.9 1.1 2.0 1.1 0.4 0.0 5.5 4.1
S 168.75 - 191.25 0.5 2.4 1.9 3.8 0.8 0.5 9.9 5.3
SSW 191.25 - 213.75 0.7 3.5 4.0 1.1 0.0 0.0 9.3 3.5
SW 213.75 - 236.25 1.6 10.5 11.2 0.1 0.0 0.0 23.4 3.0
WSW 236.25 - 258.75 1.7 3.6 0.1 0.0 0.0 0.0 5.5 1.9
W 258.75 - 281.25 1.3 1.6 0.1 0.0 0.0 0.0 3.1 1.7
WNW 281.25 - 303.75 0.9 1.5 0.7 0.1 0.0 0.0 3.2 2.4
NW 303.75 - 326.25 1.5 1.3 0.4 2.3 0.1 0.0 5.6 4.1
NNW 326.25 - 348.75 0.5 0.8 0.5 0.5 0.1 0.0 2.6 3.6
0.1
15.6 46.0 26.6 9.7 1.5 0.5 100.0 3.1
TOTAL NUMBER OF OBSERVATIONS =744
POSSIBLE NUMBER OF OBSERVATIONS =744
DATA RECOVERY =100.0%

Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country
Joint Frequency Distribution for November, 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 1.5 1.0 2.9 1.8 0.1 0.0 7.4 3.9
NNE 11.25 - 33.75 1.4 3.2 2.4 0.0 0.0 0.0 7.0 2.6
NE 33.75 - 56.25 2.1 4.9 0.0 0.1 0.0 0.0 7.1 1.8
ENE 56.25 - 78.75 2.2 2.0 0.0 0.0 0.0 0.0 4.2 1.5
E 78.75 - 101.25 1.0 1.1 0.0 0.0 0.0 0.0 2.1 1.6
ESE 101.25 - 123.75 0.7 0.8 0.0 0.0 0.0 0.0 1.5 1.5
SE 123.75 - 146.25 1.4 1.0 0.4 0.1 0.0 0.0 2.9 2.2
SSE 146.25 - 168.75 1.0 1.4 2.0 1.5 0.0 0.0 5.9 4.0
S 168.75 - 191.25 1.8 2.5 3.6 7.0 1.3 0.0 16.2 5.0
SSW 191.25 - 213.75 1.8 2.9 3.2 2.0 0.1 0.1 10.2 3.8
SW 213.75 - 236.25 1.8 7.4 8.1 0.4 0.0 0.0 17.7 3.0
WSW 236.25 - 258.75 1.3 2.4 0.1 0.1 0.0 0.0 3.9 2.0
W 258.75 - 281.25 0.8 1.0 0.0 0.0 0.0 0.0 1.8 1.7
WNW 281.25 - 303.75 1.0 0.7 0.1 0.3 0.1 0.3 2.5 3.6
NW 303.75 - 326.25 0.8 1.1 1.0 0.7 0.1 0.1 3.9 3.8
NNW 326.25 - 348.75 1.1 1.5 1.0 1.3 0.0 0.0 4.9 3.7
0.8
21.8 34.9 24.8 15.3 1.8 0.6 100.0 3.3
TOTAL NUMBER OF OBSERVATIONS =717
POSSIBLE NUMBER OF OBSERVATIONS =720
DATA RECOVERY =99.6%

Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country
Joint Frequency Distribution for December, 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 1.9 1.1 1.3 0.3 0.0 0.0 4.6 2.5
NNE 11.25 - 33.75 1.7 3.1 0.7 0.0 0.0 0.0 5.5 2.0
NE 33.75 - 56.25 2.4 4.4 0.0 0.0 0.0 0.0 6.9 1.7
ENE 56.25 - 78.75 1.7 1.5 0.0 0.0 0.0 0.0 3.2 1.7
E 78.75 - 101.25 1.6 1.1 0.0 0.0 0.0 0.0 2.7 1.4
ESE 101.25 - 123.75 0.3 0.3 0.0 0.0 0.0 0.0 0.5 1.6
SE 123.75 - 146.25 1.1 0.7 0.1 0.0 0.0 0.0 1.9 1.6
SSE 146.25 - 168.75 1.3 1.7 1.3 0.8 0.0 0.0 5.2 3.1
S 168.75 - 191.25 2.0 3.6 3.2 5.2 1.7 0.3 16.1 4.9
SSW 191.25 - 213.75 1.2 5.9 3.9 3.4 0.5 0.1 15.1 3.9
SW 213.75 - 236.25 3.4 7.4 5.6 0.1 0.0 0.0 16.5 2.6
WSW 236.25 - 258.75 0.9 3.2 0.7 0.1 0.0 0.0 5.0 2.3
W 258.75 - 281.25 0.9 0.9 0.0 0.4 0.1 0.0 2.4 2.8
WNW 281.25 - 303.75 1.5 0.5 0.5 0.4 0.5 0.5 4.0 5.0
NW 303.75 - 326.25 0.4 0.8 0.9 0.8 0.3 0.4 3.6 5.3
NNW 326.25 - 348.75 1.5 1.6 1.5 1.7 0.3 0.0 6.6 3.8
0.1
23.9 37.9 19.9 13.3 3.5 1.3 100.0 3.3
TOTAL NUMBER OF OBSERVATIONS =744
POSSIBLE NUMBER OF OBSERVATIONS =744
DATA RECOVERY =100.0%

Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott HiCountry
Joint Frequency Distribution for October - December 2023
Percentage frequency of occurence of hourly wind velocities for all stability classes
OVER 1.54 -3.09 -5.14 -8.23 -OVER AVG
0.5 3.09 5.14 8.23 10.8 10.8 SPEED
N 348.75 - 11.25 1.4 1.2 1.7 0.9 0.0 0.0 5.2 3.3
NNE 11.25 - 33.75 1.5 3.5 2.0 0.0 0.0 0.0 6.9 2.4
NE 33.75 - 56.25 2.0 5.8 0.5 0.0 0.0 0.0 8.3 2.0
ENE 56.25 - 78.75 1.5 2.3 0.0 0.0 0.0 0.0 3.9 1.7
E 78.75 - 101.25 1.0 1.0 0.0 0.0 0.0 0.0 2.0 1.5
ESE 101.25 - 123.75 0.5 0.7 0.0 0.0 0.0 0.0 1.3 1.7
SE 123.75 - 146.25 1.1 0.8 0.3 0.0 0.0 0.0 2.3 2.0
SSE 146.25 - 168.75 1.1 1.4 1.8 1.1 0.1 0.0 5.5 3.7
S 168.75 - 191.25 1.5 2.9 2.9 5.3 1.3 0.3 14.1 5.0
SSW 191.25 - 213.75 1.2 4.1 3.7 2.1 0.2 0.1 11.5 3.8
SW 213.75 - 236.25 2.3 8.4 8.3 0.2 0.0 0.0 19.2 2.9
WSW 236.25 - 258.75 1.3 3.1 0.3 0.1 0.0 0.0 4.8 2.1
W 258.75 - 281.25 1.0 1.2 0.0 0.1 0.0 0.0 2.4 2.0
WNW 281.25 - 303.75 1.1 0.9 0.5 0.3 0.2 0.3 3.3 3.8
NW 303.75 - 326.25 0.9 1.1 0.8 1.3 0.2 0.2 4.4 4.3
NNW 326.25 - 348.75 1.0 1.3 1.0 1.2 0.1 0.0 4.7 3.7
0.4
20.4 39.6 23.8 12.7 2.3 0.8 100.0 3.2
TOTAL NUMBER OF OBSERVATIONS =2205
POSSIBLE NUMBER OF OBSERVATIONS =2208
DATA RECOVERY =99.9%
Wind Speed (mps)
TOTALWind Direction
CALM
TOTAL
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants
APPENDIX B: HOURLY TEMPERATURE DATA FOR FOURTH QUARTER
2023

DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
TEMPERATURE in Deg F for OCTOBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 51.9 48.2 47.2 48.7 47.7 45.3 46.1 47.0 49.3 52.2 54.5 55.9 58.4 59.6 61.2 61.3 61.4 57.7 54.3 54.2 54.5 52.8 51.3 52.1 53.0 61.4 45.3
2 53.3 51.0 49.6 47.9 45.5 45.2 45.8 46.2 45.1 46.2 46.9 45.6 44.2 41.7 41.1 42.8 44.3 44.5 44.0 43.3 43.1 43.8 42.4 44.5 45.3 53.3 41.1
3 44.5 44.5 42.9 42.7 42.6 43.8 43.3 45.1 46.3 48.5 50.1 49.1 49.6 49.7 48.4 47.7 46.9 46.2 45.5 45.1 45.2 44.7 45.0 45.5 45.9 50.1 42.6
4 46.5 46.6 45.8 45.0 45.9 45.2 45.0 46.4 50.0 50.9 51.3 52.7 54.6 55.6 55.5 56.0 56.2 53.1 50.4 49.0 49.2 49.8 48.4 48.6 49.9 56.2 45.0
5 48.2 48.7 47.4 47.2 47.1 46.7 46.2 51.3 54.7 55.5 57.2 58.9 60.1 60.3 60.3 60.0 59.3 56.8 54.1 53.0 52.4 51.7 51.8 51.6 53.4 60.3 46.2
6 52.6 52.5 53.2 53.0 52.8 50.4 50.0 54.8 57.7 60.3 62.0 63.8 65.3 66.4 65.2 64.3 62.9 60.0 57.5 56.7 56.4 55.7 55.2 55.0 57.7 66.4 50.0
7 54.6 53.7 53.9 53.7 53.8 53.3 53.1 57.3 58.8 60.0 61.7 64.5 65.6 67.6 68.8 69.4 67.3 62.7 60.0 59.3 58.8 58.0 57.4 56.7 59.6 69.4 53.1
8 56.9 56.6 56.4 55.7 57.1 57.7 56.1 58.3 60.5 62.8 65.8 66.8 68.9 70.6 72.4 71.5 69.9 65.8 63.1 61.5 61.9 63.6 62.0 62.2 62.7 72.4 55.7
9 62.0 61.4 61.4 60.2 59.3 60.2 61.0 62.4 61.8 63.8 67.1 70.0 71.8 73.3 74.4 74.0 72.3 67.3 64.6 64.3 65.5 64.3 64.3 63.0 65.4 74.4 59.3
10 61.8 58.6 57.2 59.7 61.3 60.2 58.4 61.0 65.5 66.8 67.1 69.2 71.7 73.0 72.9 72.6 70.8 67.7 66.7 62.2 59.8 59.2 58.7 58.8 64.2 73.0 57.2
11 57.8 55.4 53.7 54.8 55.1 50.1 46.3 45.2 44.2 44.9 47.5 48.8 49.2 44.4 48.3 45.6 42.2 42.3 41.0 40.5 39.8 40.1 39.7 37.2 46.4 57.8 37.2
12 36.9 36.7 35.8 36.5 36.6 36.8 36.5 36.6 36.9 37.7 38.9 39.6 40.4 40.9 40.3 39.5 40.0 40.0 39.9 40.7 41.3 42.1 42.8 40.9 38.9 42.8 35.8
13 41.0 40.9 40.2 40.0 39.8 41.1 41.0 43.9 46.2 46.8 48.5 49.6 51.4 52.0 52.5 53.3 53.9 51.2 49.4 49.4 48.1 47.8 47.7 47.1 46.8 53.9 39.8
14 46.1 46.4 45.6 46.8 45.4 46.4 45.9 46.5 50.6 50.1 52.5 56.1 57.7 59.8 61.1 61.6 61.1 56.2 54.3 52.9 52.2 52.6 51.5 51.6 52.1 61.6 45.4
15 52.3 51.9 51.3 51.4 52.9 51.7 50.3 53.8 55.7 57.4 59.4 61.3 63.6 65.5 66.3 65.1 63.8 59.8 58.2 57.6 56.1 56.1 56.7 58.1 57.3 66.3 50.3
16 58.6 57.9 58.1 55.6 56.0 55.5 55.7 57.9 59.8 62.1 64.7 67.2 68.6 69.5 71.0 71.4 69.8 63.5 62.8 61.3 62.0 62.4 62.2 61.4 62.3 71.4 55.5
17 61.6 60.9 60.5 59.4 58.8 58.0 57.8 58.9 61.8 64.1 66.3 68.2 67.5 68.0 67.6 66.9 66.1 61.4 60.4 59.1 58.6 58.5 58.6 58.3 62.0 68.2 57.8
18 57.4 55.4 56.2 54.7 54.7 54.6 53.1 56.1 58.1 60.0 62.5 62.9 63.6 64.1 64.5 64.6 63.3 59.0 57.5 57.0 56.6 56.5 57.0 57.7 58.6 64.6 53.1
19 55.7 55.0 55.2 54.4 54.3 54.3 53.9 57.0 59.5 61.9 62.4 65.0 66.3 67.4 69.4 69.7 68.5 62.8 61.0 60.2 59.2 59.5 59.8 57.8 60.4 69.7 53.9
20 57.7 57.7 58.6 58.9 58.4 56.8 56.0 59.3 63.3 64.9 66.8 68.6 68.1 70.1 71.2 71.7 70.8 64.8 62.4 61.6 61.5 62.0 60.8 61.9 63.1 71.7 56.0
21 60.2 59.7 59.6 58.7 59.0 58.5 56.7 60.4 64.0 64.7 64.4 65.4 66.6 67.9 68.3 69.1 67.6 62.5 60.8 59.2 58.7 58.7 58.1 59.3 62.0 69.1 56.7
22 59.7 59.2 58.7 59.3 59.6 58.5 58.1 59.3 60.2 65.0 65.3 67.0 67.7 70.3 70.8 70.4 68.3 65.9 64.1 65.9 65.4 64.1 60.5 61.2 63.5 70.8 58.1
23 62.0 62.1 60.6 59.5 58.5 56.1 51.4 53.5 57.7 61.4 62.1 62.4 62.3 61.1 58.3 61.8 57.9 57.4 55.6 52.7 52.0 51.4 50.6 51.0 57.5 62.4 50.6
24 49.0 48.4 47.0 45.7 45.9 46.8 47.1 48.5 47.6 50.1 52.7 54.3 56.1 56.2 56.6 56.1 56.3 52.7 52.5 51.9 50.2 52.9 55.3 55.2 51.5 56.6 45.7
25 53.6 53.1 52.9 50.8 49.1 48.8 49.3 50.7 52.7 57.3 58.1 61.9 63.8 65.6 67.0 66.6 64.8 63.3 61.3 60.5 55.5 48.7 47.1 46.1 56.2 67.0 46.1
26 45.4 45.4 44.4 42.6 40.2 36.1 34.6 32.7 33.7 34.3 35.2 36.8 36.7 38.2 39.7 41.1 39.3 35.4 33.8 32.7 32.8 33.2 33.1 32.5 37.1 45.4 32.5
27 32.7 32.5 31.6 32.1 31.6 31.9 32.1 33.8 37.6 40.4 42.1 43.4 44.8 46.4 46.7 46.5 44.5 40.5 39.3 38.0 37.9 37.5 37.5 36.9 38.3 46.7 31.6
28 34.8 34.5 34.4 31.9 30.8 30.3 29.6 30.1 33.3 34.6 35.7 36.6 35.6 35.9 36.2 35.2 34.3 32.0 31.8 31.1 31.3 31.0 30.9 30.7 33.0 36.6 29.6
29 29.5 27.7 26.7 26.5 26.7 26.2 25.0 25.4 27.6 29.4 31.0 33.6 35.3 36.1 36.9 35.6 34.1 31.1 29.7 29.6 29.5 29.0 28.5 28.6 30.0 36.9 25.0
30 28.5 28.5 27.8 27.6 27.3 26.9 26.5 28.3 32.7 32.7 34.3 36.6 39.0 39.9 39.3 38.4 37.4 33.6 32.2 31.6 31.5 31.1 31.2 32.0 32.3 39.9 26.5
31 31.7 30.2 30.4 31.0 30.5 30.2 30.7 32.5 35.8 37.1 39.0 41.1 42.6 44.8 46.1 46.5 44.5 40.8 39.4 39.5 40.0 39.5 37.4 38.2 37.5 46.5 30.2
MEAN 49.8 49.1 48.5 48.1 47.9 47.2 46.5 48.4 50.6 52.4 54.0 55.6 56.7 57.5 58.0 57.9 56.8 53.5 51.9 51.0 50.6 50.3 49.8 49.7 51.7
MAX 62.0 62.1 61.4 60.2 61.3 60.2 61.0 62.4 65.5 66.8 67.1 70.0 71.8 73.3 74.4 74.0 72.3 67.7 66.7 65.9 65.5 64.3 64.3 63.0 74.4
MIN 28.5 27.7 26.7 26.5 26.7 26.2 25.0 25.4 27.6 29.4 31.0 33.6 35.3 35.9 36.2 35.2 34.1 31.1 29.7 29.6 29.5 29.0 28.5 28.6 25.0
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =51.7 Deg F
MAXIMUM TEMPERATURE =74.4 Deg F DATE OF OCCURRENCE =10/9 AT 1500 MAXIMUM DAILY MEAN =65.4 Deg F DATE OF OCCURRENCE =10/9
MINIMUM TEMPERATURE =25.0 Deg F DATE OF OCCURRENCE =10/29 AT 0700 MINUMUM DAILY MEAN =30.0 Deg F DATE OF OCCURRENCE =10/29
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
TEMPERATURE in Deg F for NOVEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 38.7 39.5 41.1 38.7 39.9 39.7 39.3 41.3 44.4 45.7 46.0 49.4 ------52.4 51.8 48.8 45.1 43.4 43.7 43.5 43.4 43.2 45.0 43.8 52.4 38.7
2 45.0 45.0 45.0 46.1 46.0 46.9 46.7 45.4 47.6 50.4 53.1 57.2 58.6 59.9 59.8 60.0 57.3 54.2 53.5 54.5 53.4 53.3 53.3 52.6 51.9 60.0 45.0
3 45.7 45.2 46.1 47.0 47.1 48.9 48.4 49.9 51.7 53.4 55.2 55.6 56.6 58.7 59.3 59.0 56.5 52.6 52.1 52.2 52.7 52.2 51.7 52.6 52.1 59.3 45.2
4 51.8 52.0 51.5 51.1 51.1 51.6 51.1 51.2 54.4 55.9 58.7 60.6 60.9 62.4 62.6 62.3 60.2 59.0 57.8 59.3 60.3 59.6 59.4 57.8 56.8 62.6 51.1
5 59.7 59.3 59.2 57.2 54.7 53.9 52.4 53.0 52.9 53.9 51.5 53.0 55.4 57.0 58.7 60.4 58.1 55.0 55.4 56.7 56.6 58.7 57.8 55.3 56.1 60.4 51.5
6 55.1 54.2 52.7 54.2 53.8 55.5 56.8 57.0 56.0 56.7 58.0 59.1 61.7 63.7 64.1 62.6 61.3 58.9 60.2 62.4 59.1 54.6 49.4 48.2 57.3 64.1 48.2
7 44.9 43.7 42.9 41.0 39.4 38.7 38.3 37.1 37.5 39.2 38.9 37.6 38.1 38.6 38.7 39.4 39.4 39.2 37.2 35.5 34.5 33.2 35.5 35.2 38.5 44.9 33.2
8 34.3 34.2 33.8 34.1 33.5 33.0 32.3 32.8 34.9 35.9 38.8 39.8 40.1 39.6 39.8 40.0 39.1 37.1 36.1 36.2 35.4 35.0 34.5 35.0 36.1 40.1 32.3
9 34.0 33.0 32.4 32.0 31.5 30.9 30.9 31.7 35.5 36.5 38.6 40.3 42.1 42.3 41.4 40.3 38.5 35.2 34.8 34.2 33.6 33.3 32.7 32.9 35.4 42.3 30.9
10 32.7 33.0 33.7 33.4 32.0 31.3 32.0 33.1 35.0 36.7 40.4 40.9 42.2 43.9 45.3 45.1 44.0 40.5 38.6 38.2 37.6 37.4 38.5 38.9 37.7 45.3 31.3
11 39.4 39.3 38.4 36.2 35.3 35.1 36.8 38.2 39.7 40.2 43.8 45.4 47.2 48.6 48.1 48.6 46.8 44.4 43.8 44.0 43.9 45.0 45.0 43.3 42.4 48.6 35.1
12 43.2 42.9 43.1 42.9 42.8 42.8 43.0 44.8 46.0 49.1 50.6 52.3 54.3 55.8 57.1 57.4 53.3 49.6 49.2 48.1 52.6 53.1 52.1 51.0 49.0 57.4 42.8
13 50.6 50.2 51.2 50.9 49.4 47.9 47.6 46.9 49.0 52.0 56.3 56.9 56.4 58.3 59.5 58.3 56.8 54.1 52.6 50.7 51.4 51.5 53.4 53.0 52.7 59.5 46.9
14 51.7 50.9 50.4 51.2 51.4 51.1 50.8 51.4 52.2 55.2 55.3 56.2 57.1 58.8 60.5 60.0 56.8 53.0 52.4 49.4 49.4 50.6 52.6 53.3 53.4 60.5 49.4
15 53.1 51.2 50.5 50.7 50.4 49.2 47.6 49.5 52.4 54.1 56.3 55.8 57.8 58.5 59.8 59.6 56.9 55.7 56.6 57.5 56.4 55.5 55.7 55.8 54.4 59.8 47.6
16 55.7 53.3 48.3 48.2 48.3 45.7 45.7 43.9 44.7 46.2 45.4 45.2 44.8 44.7 45.5 45.5 45.2 43.5 43.4 43.4 44.2 44.0 43.6 43.0 45.9 55.7 43.0
17 43.5 45.2 43.7 42.3 43.2 41.9 41.0 40.9 44.7 47.9 48.3 49.7 51.4 52.7 53.0 52.9 49.8 46.0 44.6 44.5 44.9 44.4 43.1 44.3 46.0 53.0 40.9
18 45.5 48.6 45.9 47.4 47.9 47.8 49.0 49.1 44.8 44.1 45.6 46.8 47.9 47.8 46.7 46.0 45.7 43.4 42.5 43.9 45.3 44.9 42.8 40.8 45.8 49.1 40.8
19 40.7 44.5 44.3 42.4 42.6 41.8 41.1 40.7 39.8 39.2 39.4 39.7 40.8 40.4 39.2 37.3 34.8 33.3 31.5 30.5 30.1 29.6 30.1 30.2 37.7 44.5 29.6
20 30.1 30.4 30.4 30.8 31.6 31.5 31.5 31.3 31.5 32.0 32.2 35.9 37.4 37.5 38.2 37.7 35.3 34.4 34.2 33.6 33.6 33.0 32.2 31.7 33.3 38.2 30.1
21 30.8 29.7 29.0 29.9 29.4 28.6 28.6 29.0 31.8 33.5 35.0 36.2 36.6 38.1 39.7 39.1 36.6 34.2 34.1 34.5 33.1 32.4 31.8 31.6 33.1 39.7 28.6
22 32.9 33.6 33.3 32.8 31.4 30.8 31.6 31.9 35.0 36.9 36.9 38.6 40.7 42.2 43.0 43.1 40.2 36.8 36.3 35.8 34.8 34.4 35.0 35.3 36.0 43.1 30.8
23 35.4 35.8 34.4 35.2 34.8 33.8 33.4 33.4 33.2 34.2 36.0 35.7 37.1 36.5 35.5 34.5 34.5 35.3 33.6 32.4 31.2 31.0 30.9 30.7 34.1 37.1 30.7
24 30.5 30.1 29.9 28.8 27.8 26.5 26.3 25.9 26.0 25.4 26.3 27.3 27.9 27.7 28.1 27.8 27.5 27.3 27.4 27.3 27.4 27.2 26.6 25.6 27.4 30.5 25.4
25 25.9 25.2 24.7 24.3 25.2 23.8 23.7 23.1 22.6 24.2 25.8 27.3 27.4 28.0 27.9 27.5 26.9 26.8 25.2 24.9 25.4 25.8 25.6 25.7 25.5 28.0 22.6
26 25.8 25.1 24.5 23.8 23.6 24.1 24.4 24.7 25.2 25.6 26.1 26.3 26.9 27.2 27.3 27.2 26.4 25.6 25.4 25.6 24.8 22.8 22.0 21.9 25.1 27.3 21.9
27 21.5 21.0 21.2 21.0 20.8 20.9 21.0 20.5 23.5 27.0 27.2 28.4 29.7 30.5 31.6 31.1 28.8 26.9 26.1 26.0 24.9 24.3 24.2 24.3 25.1 31.6 20.5
28 24.3 24.2 24.7 25.3 24.5 25.1 23.9 24.5 28.2 30.1 29.5 31.7 32.8 34.2 35.0 35.5 31.9 29.3 28.5 28.3 27.6 29.2 35.2 29.6 28.9 35.5 23.9
29 26.8 25.7 27.4 29.6 30.1 28.4 26.5 25.6 29.9 31.8 30.6 31.1 31.7 33.7 34.7 33.1 30.8 29.2 27.5 27.1 26.8 25.7 25.1 24.4 28.9 34.7 24.4
30 23.4 22.2 21.7 21.7 21.0 21.7 22.4 22.4 22.6 23.5 23.9 24.7 25.3 25.9 26.6 27.4 27.4 26.6 26.4 25.6 25.4 25.6 27.9 29.3 24.6 29.3 21.0
MEAN 39.1 38.9 38.5 38.3 38.0 37.6 37.5 37.7 39.1 40.6 41.7 42.8 43.7 44.6 45.3 45.0 43.2 41.1 40.3 40.2 40.0 39.7 39.7 39.3 40.5
MAX 59.7 59.3 59.2 57.2 54.7 55.5 56.8 57.0 56.0 56.7 58.7 60.6 61.7 63.7 64.1 62.6 61.3 59.0 60.2 62.4 60.3 59.6 59.4 57.8 64.1
MIN 21.5 21.0 21.2 21.0 20.8 20.9 21.0 20.5 22.6 23.5 23.9 24.7 25.3 25.9 26.6 27.2 26.4 25.6 25.2 24.9 24.8 22.8 22.0 21.9 20.5
POSSIBLE NUMBER OF OBSERVATIONS =720 ACTUAL NUMBER OF OBSERVATIONS =718 DATA RECOVERY RATE =
MONTHLY MEAN =40.5 Deg F
MAXIMUM TEMPERATURE =64.1 Deg F DATE OF OCCURRENCE =11/6 AT 1500 MAXIMUM DAILY MEAN =57.3 Deg F DATE OF OCCURRENCE =11/6
MINIMUM TEMPERATURE =20.5 Deg F DATE OF OCCURRENCE =11/27 AT 0800 MINUMUM DAILY MEAN =24.6 Deg F DATE OF OCCURRENCE =11/30
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
99.7%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott C3
TEMPERATURE in Deg F for DECEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 27.2 28.3 27.2 25.5 25.4 26.1 27.0 27.2 27.8 28.6 29.3 29.4 28.8 29.2 29.1 28.8 28.0 27.0 27.6 27.0 26.5 25.5 25.8 27.7 27.5 29.4 25.4
2 29.4 30.0 30.7 31.7 31.4 28.5 28.5 28.8 28.4 29.5 29.7 32.8 32.6 31.5 31.9 32.2 32.0 32.2 33.0 37.5 39.8 38.6 39.2 41.1 32.5 41.1 28.4
3 39.7 34.1 32.5 32.2 32.0 31.8 31.5 31.4 31.7 32.5 34.6 35.8 36.4 37.1 37.0 36.9 36.4 35.9 36.6 36.9 36.8 36.9 37.7 39.8 35.2 39.8 31.4
4 42.3 40.4 39.8 38.5 38.1 38.0 38.6 39.1 40.8 44.5 45.6 44.8 45.1 46.5 46.1 45.2 43.0 42.1 42.9 42.7 42.2 41.5 42.1 42.8 42.2 46.5 38.0
5 42.6 40.9 41.4 41.0 41.2 40.2 41.3 40.2 42.8 44.1 46.9 48.6 50.5 49.6 49.3 48.8 44.7 43.9 44.1 43.7 43.9 43.8 45.1 44.7 44.3 50.5 40.2
6 45.4 45.8 44.1 43.3 43.0 42.1 41.2 40.0 49.5 51.7 51.5 51.6 52.2 51.8 51.0 52.6 51.5 50.8 51.4 52.1 50.7 47.2 49.2 51.4 48.4 52.6 40.0
7 54.3 52.1 52.1 50.3 49.1 46.4 43.7 42.2 42.5 42.3 41.8 39.4 39.2 38.8 37.5 38.0 36.1 34.3 34.7 34.2 33.8 34.1 33.5 35.5 41.1 54.3 33.5
8 34.8 33.0 30.6 32.0 30.9 28.8 29.2 29.2 29.6 29.7 28.4 28.5 27.9 27.3 26.9 27.1 26.3 27.4 26.8 25.4 24.1 23.9 22.5 23.6 28.1 34.8 22.5
9 22.9 22.6 21.6 21.7 22.2 20.9 19.9 19.6 21.2 25.5 26.9 26.2 26.1 26.5 27.8 27.5 25.4 23.9 23.8 23.5 23.9 23.6 23.5 23.1 23.7 27.8 19.6
10 22.3 23.3 23.2 25.1 26.2 27.0 27.0 28.1 28.7 31.9 34.9 33.9 35.1 36.8 37.5 35.4 33.3 31.9 31.8 31.7 32.9 31.2 30.8 32.2 30.5 37.5 22.3
11 34.3 33.7 30.5 28.8 30.4 29.6 30.2 31.0 32.0 34.5 36.6 38.5 38.8 39.8 39.8 37.5 33.8 32.6 32.4 31.2 31.1 29.9 29.6 28.9 33.1 39.8 28.8
12 28.2 29.1 30.9 30.9 30.2 28.7 28.9 28.6 29.7 32.6 33.9 36.7 36.3 37.2 37.3 37.0 35.5 34.3 33.5 32.9 32.1 32.4 33.5 32.7 32.6 37.3 28.2
13 32.1 32.3 33.1 32.8 32.4 32.1 31.9 32.2 34.0 35.5 37.1 38.0 39.5 40.8 41.6 40.1 36.7 34.7 34.5 34.5 33.8 33.0 33.1 32.4 34.9 41.6 31.9
14 31.4 31.5 32.4 31.2 30.3 30.0 29.0 30.0 32.7 35.7 36.8 37.3 37.7 37.5 37.9 37.5 34.8 33.5 33.2 32.0 31.4 31.6 31.1 32.7 33.3 37.9 29.0
15 34.0 34.1 31.8 31.0 31.0 30.5 31.5 31.6 33.7 38.6 36.3 38.0 40.1 40.1 40.4 39.6 35.7 34.0 33.0 33.9 33.4 33.2 35.2 34.9 34.8 40.4 30.5
16 34.6 34.6 31.9 33.2 30.9 31.4 33.6 32.9 34.0 36.1 37.9 38.6 39.1 38.7 39.8 38.3 36.3 33.7 32.5 31.9 32.3 34.9 34.8 33.7 34.8 39.8 30.9
17 31.1 31.5 31.6 31.6 31.5 31.3 30.4 28.8 31.2 36.5 36.8 38.6 38.1 37.9 37.9 36.5 33.2 30.8 30.8 33.5 34.7 33.8 34.6 35.9 33.7 38.6 28.8
18 32.7 34.7 32.4 34.1 33.2 35.0 34.1 31.1 29.4 33.1 33.4 42.4 41.2 39.3 40.5 36.6 32.5 34.1 41.7 43.1 44.5 43.9 43.2 42.8 37.0 44.5 29.4
19 44.8 44.4 45.6 43.9 43.3 42.0 41.9 40.5 40.0 41.5 44.9 48.7 51.5 51.2 51.4 51.1 49.3 47.1 43.7 46.3 45.3 45.9 45.8 46.1 45.7 51.5 40.0
20 43.0 43.2 44.8 45.4 42.5 46.5 47.9 47.6 47.1 43.7 43.4 45.3 48.3 48.5 49.2 48.4 47.5 46.7 45.9 45.5 44.4 43.5 43.8 43.5 45.7 49.2 42.5
21 43.1 43.3 42.5 42.2 41.1 39.7 39.7 40.4 42.1 44.9 47.1 47.6 48.3 48.6 50.1 47.6 45.6 43.4 41.9 40.8 41.0 42.0 42.6 43.5 43.7 50.1 39.7
22 42.8 42.7 42.0 40.8 39.9 39.5 39.9 40.4 40.9 44.0 45.2 45.8 46.8 46.5 47.1 46.1 44.7 43.1 42.2 42.4 41.8 41.2 40.0 39.9 42.7 47.1 39.5
23 39.7 39.3 38.6 38.0 37.2 37.3 35.6 32.3 31.7 31.9 31.1 31.0 29.6 30.2 28.7 27.5 26.4 26.3 26.1 25.0 25.4 24.9 24.1 24.7 30.9 39.7 24.1
24 25.1 23.7 23.1 23.0 23.7 23.3 21.3 20.8 22.6 25.1 26.7 24.6 26.6 27.2 27.1 26.3 25.0 23.4 22.0 21.6 21.0 20.3 20.6 20.3 23.5 27.2 20.3
25 20.3 20.4 19.0 18.7 19.4 19.6 19.0 18.2 19.9 24.9 24.9 25.0 27.6 29.5 28.2 26.6 24.1 21.7 20.9 20.2 20.2 20.1 20.2 19.4 22.0 29.5 18.2
26 19.5 19.3 19.2 19.7 21.3 20.1 19.1 19.4 22.1 23.9 24.0 26.4 28.8 28.5 28.5 29.8 28.7 26.8 27.0 26.6 26.1 25.4 25.0 25.1 24.2 29.8 19.1
27 24.7 25.1 25.3 25.8 25.9 25.8 25.5 26.6 27.5 29.1 30.4 30.9 32.1 33.9 34.3 34.0 32.5 29.5 28.1 27.6 27.5 29.8 28.4 29.2 28.7 34.3 24.7
28 28.9 28.6 29.2 30.6 30.5 31.9 31.9 29.5 32.4 31.0 34.6 35.8 36.6 37.3 37.2 35.6 33.4 32.6 35.9 34.3 31.9 33.6 35.0 34.5 33.0 37.3 28.6
29 35.2 32.6 31.4 31.1 32.4 32.6 34.9 31.9 32.3 32.8 35.0 38.5 40.7 40.7 42.3 42.7 39.7 36.9 36.6 37.7 40.7 41.4 41.0 40.3 36.7 42.7 31.1
30 41.5 42.4 43.4 42.7 43.6 44.2 43.0 42.8 45.2 44.8 43.7 45.4 45.6 46.2 45.2 42.8 42.0 38.5 42.2 39.3 39.4 38.1 37.2 38.7 42.4 46.2 37.2
31 40.4 40.2 38.2 36.8 33.9 33.3 32.8 34.0 37.7 37.1 36.5 36.4 39.0 39.5 40.1 39.5 36.7 34.5 34.9 35.4 34.8 32.8 31.9 32.5 36.2 40.4 31.9
MEAN 34.5 34.1 33.5 33.3 33.0 32.7 32.6 32.1 33.6 35.4 36.3 37.4 38.3 38.5 38.7 37.9 35.8 34.4 34.6 34.5 34.4 34.1 34.2 34.6 34.9
MAX 54.3 52.1 52.1 50.3 49.1 46.5 47.9 47.6 49.5 51.7 51.5 51.6 52.2 51.8 51.4 52.6 51.5 50.8 51.4 52.1 50.7 47.2 49.2 51.4 54.3
MIN 19.5 19.3 19.0 18.7 19.4 19.6 19.0 18.2 19.9 23.9 24.0 24.6 26.1 26.5 26.9 26.3 24.1 21.7 20.9 20.2 20.2 20.1 20.2 19.4 18.2
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =34.9 Deg F
MAXIMUM TEMPERATURE =54.3 Deg F DATE OF OCCURRENCE =12/7 AT 0100 MAXIMUM DAILY MEAN =48.4 Deg F DATE OF OCCURRENCE =12/6
MINIMUM TEMPERATURE =18.2 Deg F DATE OF OCCURRENCE =12/25 AT 0800 MINUMUM DAILY MEAN =22.0 Deg F DATE OF OCCURRENCE =12/25
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country
TEMPERATURE in Deg F for OCTOBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 48.6 45.9 45.7 46.0 45.3 44.3 44.6 44.8 47.4 50.2 52.4 54.1 56.0 57.3 59.1 58.9 59.0 54.8 51.1 51.1 52.1 50.7 50.8 50.5 50.9 59.1 44.3
2 50.4 47.3 48.0 46.8 44.6 43.3 43.6 44.4 44.1 45.2 44.6 42.8 41.0 40.0 39.7 41.0 42.4 42.6 42.6 42.7 42.8 42.8 42.9 44.2 43.7 50.4 39.7
3 43.9 42.7 42.2 42.6 43.4 43.8 43.2 44.1 44.7 47.3 49.0 48.1 47.0 47.1 46.4 45.3 44.5 44.0 43.7 43.5 43.5 45.4 46.1 46.3 44.9 49.0 42.2
4 46.3 46.5 45.3 43.6 45.4 44.4 45.6 46.0 48.5 50.3 50.2 51.1 51.9 52.8 52.7 52.5 53.1 51.4 50.2 49.6 48.8 49.7 48.6 50.0 48.9 53.1 43.6
5 50.5 50.2 48.9 49.0 48.9 47.9 48.2 50.1 51.4 52.3 53.7 55.8 57.1 58.0 58.2 58.0 57.2 55.0 53.4 53.0 53.7 53.3 53.2 53.5 52.9 58.2 47.9
6 54.4 54.3 53.9 54.3 53.7 53.4 51.5 53.5 56.0 57.1 59.2 60.4 62.2 63.2 61.5 61.6 60.5 58.1 57.2 57.7 57.1 56.7 56.3 56.0 57.1 63.2 51.5
7 56.7 56.3 56.3 55.9 56.0 55.9 55.6 57.0 58.3 59.3 60.2 62.1 63.4 64.9 66.1 66.8 65.3 61.8 60.2 60.1 59.7 59.5 58.9 58.5 59.8 66.8 55.6
8 59.7 58.8 57.7 58.3 58.6 58.4 58.8 60.2 61.0 62.6 65.9 66.0 66.6 67.9 68.9 68.9 67.7 64.9 63.9 63.2 62.6 63.4 63.5 62.5 62.9 68.9 57.7
9 62.3 62.4 62.2 61.4 61.4 61.2 61.2 62.4 64.0 65.5 67.8 69.5 72.0 72.3 72.4 71.6 68.9 66.8 65.1 64.9 64.2 64.7 64.2 63.3 65.5 72.4 61.2
10 63.2 63.4 63.6 63.2 60.7 59.3 58.4 61.8 63.3 64.4 65.4 67.8 69.9 70.8 71.6 70.9 68.8 65.0 61.4 60.1 60.1 59.4 59.5 58.8 63.8 71.6 58.4
11 56.3 53.1 52.4 53.9 52.7 47.9 44.3 43.3 42.7 42.0 44.6 45.3 46.7 41.1 44.8 45.0 40.8 41.6 39.9 37.9 38.8 40.6 38.3 35.8 44.6 56.3 35.8
12 35.8 35.1 33.6 33.7 34.3 35.8 36.0 34.9 34.9 35.7 36.6 37.7 38.3 39.0 38.8 38.7 40.4 39.9 38.2 41.2 41.5 42.3 41.7 41.2 37.7 42.3 33.6
13 41.2 41.3 40.7 40.7 40.6 41.8 42.0 43.4 45.6 46.8 47.4 48.7 50.5 50.5 50.8 51.6 51.7 49.9 48.8 49.1 50.1 48.5 48.4 48.1 46.6 51.7 40.6
14 47.7 47.6 47.7 47.5 46.9 46.2 48.3 47.2 50.4 50.2 53.2 55.2 57.2 59.1 59.4 60.1 58.6 55.9 54.1 53.3 53.0 53.6 53.4 53.1 52.5 60.1 46.2
15 54.7 53.5 53.5 54.0 53.8 53.2 54.0 54.8 56.1 57.5 58.1 59.9 61.7 62.8 63.5 63.0 61.5 59.0 59.0 59.3 58.6 58.3 59.6 59.3 57.9 63.5 53.2
16 59.9 59.7 60.1 58.8 58.2 58.1 57.5 60.3 63.1 64.3 65.4 67.1 68.3 68.2 68.2 68.4 67.4 64.8 63.7 63.1 64.2 63.9 63.7 63.8 63.3 68.4 57.5
17 62.9 63.6 63.0 62.9 61.7 60.4 59.6 59.4 60.1 62.7 64.5 64.2 64.5 64.3 64.5 63.8 63.5 61.6 62.1 61.3 59.9 61.1 60.3 59.2 62.1 64.5 59.2
18 58.8 57.7 57.8 55.7 55.6 56.1 55.0 57.0 55.3 58.6 59.9 60.6 61.1 61.8 61.8 61.7 61.1 58.6 58.1 58.4 57.8 57.0 58.3 59.3 58.5 61.8 55.0
19 57.4 57.1 57.4 56.9 56.3 56.1 56.3 58.2 58.5 60.1 61.6 63.4 64.4 65.2 66.2 66.8 65.9 63.4 62.0 62.0 61.2 61.4 61.7 59.7 60.8 66.8 56.1
20 60.1 60.5 60.7 61.3 60.7 59.8 59.4 60.6 62.6 63.7 65.2 66.2 66.3 68.0 68.8 68.9 68.4 65.4 63.0 63.2 63.4 63.3 62.7 63.3 63.6 68.9 59.4
21 62.2 61.7 61.6 61.8 62.2 60.3 60.7 61.9 61.9 64.4 64.4 63.8 64.2 64.9 65.7 65.5 64.5 62.1 60.8 59.7 60.5 61.4 60.5 59.8 62.4 65.7 59.7
22 60.2 61.0 60.5 60.1 60.2 60.0 59.7 61.1 62.9 63.9 64.7 67.0 67.1 68.8 69.3 68.0 67.1 65.4 64.2 62.8 62.4 61.4 59.7 60.0 63.2 69.3 59.7
23 60.6 60.0 58.3 58.4 57.5 55.1 53.1 53.1 55.1 59.1 60.8 60.0 59.7 59.2 57.1 57.1 55.8 54.9 54.3 53.9 53.3 52.3 51.4 51.6 56.3 60.8 51.4
24 50.7 49.0 46.7 46.2 45.9 47.4 47.8 48.0 46.8 49.2 51.5 52.6 53.2 55.7 53.9 54.7 54.4 52.0 51.9 52.2 52.6 53.7 53.5 52.6 50.9 55.7 45.9
25 51.7 51.1 51.1 48.9 51.7 47.4 51.9 54.5 54.8 55.5 57.7 61.1 62.0 64.0 64.9 64.3 62.5 61.3 60.2 59.2 56.7 47.1 45.4 44.4 55.4 64.9 44.4
26 43.6 43.3 43.3 41.3 38.0 34.2 32.2 30.9 29.5 30.0 31.9 32.8 34.1 35.6 37.3 38.4 36.1 33.6 32.7 32.2 31.3 31.4 32.4 32.0 34.9 43.6 29.5
27 31.5 31.4 31.9 33.1 32.4 34.1 33.8 35.5 38.6 40.0 41.7 41.5 42.6 43.7 44.8 44.1 42.6 40.0 39.4 38.5 38.8 38.8 38.8 38.7 38.2 44.8 31.4
28 36.7 34.1 33.2 31.6 30.0 29.5 29.1 29.2 30.4 32.1 33.5 34.4 33.4 32.9 33.2 32.5 31.5 30.2 30.0 29.4 29.0 29.8 29.8 29.2 31.4 36.7 29.0
29 28.7 28.2 27.0 26.0 25.8 23.9 22.2 23.7 24.1 26.0 28.3 31.0 32.5 34.2 34.1 33.1 31.5 29.2 29.3 29.2 29.1 29.0 28.9 29.3 28.5 34.2 22.2
30 28.7 29.1 28.5 28.3 28.7 28.3 28.1 28.8 30.4 31.5 32.5 34.2 35.6 37.0 37.3 36.6 35.4 32.9 32.3 32.1 32.3 31.9 31.9 33.7 31.9 37.3 28.1
31 31.7 31.6 32.4 32.3 32.0 33.1 33.0 33.2 34.5 36.6 38.2 40.0 41.2 42.6 43.9 43.9 43.4 40.8 41.4 42.1 41.9 41.5 40.1 41.0 38.0 43.9 31.6
MEAN 50.2 49.6 49.2 48.8 48.5 47.8 47.6 48.5 49.6 51.1 52.6 53.7 54.6 55.3 55.6 55.5 54.6 52.5 51.4 51.2 51.0 50.8 50.5 50.3 51.3
MAX 63.2 63.6 63.6 63.2 62.2 61.2 61.2 62.4 64.0 65.5 67.8 69.5 72.0 72.3 72.4 71.6 68.9 66.8 65.1 64.9 64.2 64.7 64.2 63.8 72.4
MIN 28.7 28.2 27.0 26.0 25.8 23.9 22.2 23.7 24.1 26.0 28.3 31.0 32.5 32.9 33.2 32.5 31.5 29.2 29.3 29.2 29.0 29.0 28.9 29.2 22.2
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =51.3 Deg F
MAXIMUM TEMPERATURE =72.4 Deg F DATE OF OCCURRENCE =10/9 AT 1500 MAXIMUM DAILY MEAN =65.5 Deg F DATE OF OCCURRENCE =10/9
MINIMUM TEMPERATURE =22.2 Deg F DATE OF OCCURRENCE =10/29 AT 0700 MINUMUM DAILY MEAN =28.5 Deg F DATE OF OCCURRENCE =10/29
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country
TEMPERATURE in Deg F for NOVEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 41.2 43.2 44.0 42.1 43.1 42.3 43.4 43.7 46.6 ------49.0 49.5 50.5 50.1 50.4 46.5 44.7 45.6 45.5 47.5 46.4 46.6 47.6 45.9 50.5 41.2
2 48.5 47.2 47.4 47.6 47.3 48.0 48.7 48.0 49.0 50.2 55.2 55.7 58.0 59.5 60.1 58.0 56.5 54.4 54.9 54.8 54.5 55.9 55.1 54.1 52.9 60.1 47.2
3 46.6 45.7 46.8 48.1 50.9 50.1 49.3 49.1 50.1 52.4 54.4 53.9 55.5 56.4 56.3 56.5 55.1 52.4 51.2 51.3 51.6 52.0 52.5 53.2 51.7 56.5 45.7
4 53.0 52.8 52.8 52.0 51.0 51.0 51.4 53.1 55.0 57.0 59.3 60.4 62.0 61.3 61.4 60.6 59.5 58.7 59.1 58.9 58.8 59.2 60.2 59.8 57.0 62.0 51.0
5 59.1 58.7 57.0 56.4 55.9 55.3 57.4 57.0 52.6 51.6 51.2 53.3 54.9 56.0 57.8 58.8 58.0 55.9 56.2 56.0 57.0 56.7 56.0 54.5 56.0 59.1 51.2
6 55.0 54.5 54.7 55.3 55.5 55.2 55.1 54.7 54.2 54.5 55.4 58.5 59.9 62.0 61.0 60.6 61.5 59.5 59.3 61.2 58.0 54.1 48.1 46.5 56.4 62.0 46.5
7 43.6 42.0 41.4 39.7 37.6 36.8 36.5 35.3 35.4 36.6 36.8 35.7 36.2 36.9 37.0 37.0 36.5 36.4 35.1 34.2 33.7 31.5 32.5 34.1 36.6 43.6 31.5
8 34.1 33.8 33.4 33.0 32.4 32.2 31.6 31.6 31.6 33.2 35.0 36.1 37.2 37.0 36.7 37.5 37.0 36.1 35.1 34.3 34.6 34.6 34.5 34.5 34.5 37.5 31.6
9 34.7 33.7 34.1 33.7 32.6 32.3 32.5 32.5 33.9 34.6 35.8 36.8 38.6 39.8 39.6 38.3 36.4 34.9 35.0 35.1 34.2 34.5 34.5 34.0 35.1 39.8 32.3
10 34.3 34.8 34.9 34.5 34.7 34.3 34.2 33.7 34.4 38.5 41.1 41.3 41.6 42.7 43.4 43.1 42.1 40.5 39.0 38.0 39.7 40.5 40.1 40.1 38.4 43.4 33.7
11 41.1 40.3 39.6 37.1 36.7 37.6 38.7 39.0 42.6 43.1 45.1 46.1 47.7 47.8 46.3 46.0 45.3 44.3 44.2 44.6 44.7 44.8 45.4 44.4 43.0 47.8 36.7
12 44.7 45.5 45.2 45.8 45.3 45.2 45.3 45.9 48.6 49.9 51.7 53.6 54.4 55.1 55.3 55.3 53.5 51.2 50.2 53.0 52.8 52.3 53.4 52.4 50.2 55.3 44.7
13 51.4 50.4 50.4 51.0 51.5 51.4 49.1 50.5 49.6 54.6 54.5 54.1 54.3 56.4 57.1 56.3 54.9 53.6 53.3 52.7 52.9 52.3 51.8 50.0 52.7 57.1 49.1
14 48.0 47.3 46.9 47.1 48.5 48.7 48.8 48.5 51.1 52.5 53.7 54.4 56.2 58.0 58.3 57.9 55.6 52.9 52.3 50.5 50.3 52.9 52.2 50.8 51.8 58.3 46.9
15 51.8 52.0 49.8 50.4 49.9 49.3 47.2 47.1 49.2 53.9 54.9 54.5 55.9 57.9 58.7 58.1 56.9 56.5 56.5 55.8 54.1 53.3 53.3 53.5 53.4 58.7 47.1
16 53.4 49.6 46.0 45.9 45.6 45.2 44.9 43.1 44.0 44.3 44.5 43.6 43.0 42.4 42.6 42.8 42.6 42.0 44.1 43.7 43.4 43.9 44.2 44.3 44.5 53.4 42.0
17 43.2 44.3 45.0 44.0 43.8 43.8 43.9 42.9 44.5 46.9 49.0 50.2 51.5 50.4 49.7 48.8 47.7 45.8 44.9 47.0 46.9 46.9 46.5 47.0 46.4 51.5 42.9
18 48.4 47.5 46.5 45.8 45.8 46.4 47.1 47.4 46.5 44.8 46.0 46.3 47.1 45.5 43.6 44.8 43.7 42.0 42.8 42.9 42.8 43.5 42.0 42.6 45.1 48.4 42.0
19 43.1 42.7 42.1 42.3 42.2 40.3 39.4 39.6 38.0 37.2 37.5 37.8 38.4 37.9 36.8 35.2 33.3 31.4 30.6 30.4 29.6 28.7 28.6 28.5 36.3 43.1 28.5
20 28.1 28.5 28.4 28.6 30.8 30.7 30.9 30.7 31.2 31.6 32.3 34.5 34.9 35.4 35.5 35.1 33.8 33.0 33.1 32.8 31.8 31.1 31.1 31.3 31.9 35.5 28.1
21 30.9 30.1 29.7 30.0 29.8 29.8 29.2 29.6 31.4 32.5 33.0 33.8 34.3 36.2 36.9 37.3 35.3 34.2 34.5 34.9 33.4 32.6 32.1 31.9 32.6 37.3 29.2
22 34.0 35.1 34.3 33.1 32.0 32.9 33.4 34.3 36.9 36.2 35.9 37.1 38.6 40.1 40.9 41.1 39.5 37.8 37.3 36.4 35.4 36.5 38.3 37.5 36.4 41.1 32.0
23 37.3 38.2 37.0 38.4 36.9 35.2 34.4 35.2 32.9 35.3 36.1 34.1 34.9 34.3 33.5 32.5 31.9 32.9 32.9 31.0 30.0 29.9 30.1 30.1 34.0 38.4 29.9
24 30.0 29.4 28.9 27.7 26.6 25.7 24.8 24.6 24.5 23.7 24.4 24.9 24.8 24.8 24.9 24.9 25.4 25.0 24.8 25.2 25.6 25.2 24.4 23.4 25.6 30.0 23.4
25 23.5 24.5 23.4 22.5 22.5 21.4 21.1 21.0 20.7 21.8 23.2 24.8 25.7 26.4 26.1 25.8 25.2 24.8 24.6 24.5 24.9 25.0 24.8 24.5 23.9 26.4 20.7
26 24.6 23.8 23.6 23.6 23.6 22.8 23.0 23.3 23.3 23.9 24.0 24.7 24.9 25.1 25.2 25.0 24.5 23.9 23.6 23.2 22.7 22.0 22.0 21.6 23.7 25.2 21.6
27 21.5 21.5 21.4 21.5 21.6 21.6 21.5 21.3 21.9 24.6 25.2 26.3 27.3 28.0 28.7 28.9 28.1 27.4 26.9 26.3 25.4 25.9 25.7 26.2 24.8 28.9 21.3
28 26.8 27.8 28.5 27.9 27.5 28.1 27.8 27.7 30.4 31.7 31.1 31.3 32.1 32.5 33.2 33.6 32.3 30.4 30.1 31.4 31.7 33.8 36.5 35.3 30.8 36.5 26.8
29 32.2 31.9 31.6 33.2 35.8 35.8 30.2 31.3 32.4 32.3 30.9 31.0 30.8 32.4 33.0 32.2 29.7 29.3 29.3 30.1 33.8 27.7 23.9 22.3 31.0 35.8 22.3
30 28.5 29.8 21.7 19.5 21.0 19.9 20.7 20.6 25.2 22.6 23.1 24.1 25.3 25.0 25.7 26.0 25.9 26.0 25.2 24.8 26.4 28.2 29.0 29.3 24.7 29.8 19.5
MEAN 39.7 39.6 38.9 38.6 38.6 38.3 38.0 38.1 38.9 39.7 40.7 41.6 42.5 43.1 43.2 42.9 41.8 40.6 40.4 40.4 40.3 40.1 39.8 39.5 40.2
MAX 59.1 58.7 57.0 56.4 55.9 55.3 57.4 57.0 55.0 57.0 59.3 60.4 62.0 62.0 61.4 60.6 61.5 59.5 59.3 61.2 58.8 59.2 60.2 59.8 62.0
MIN 21.5 21.5 21.4 19.5 21.0 19.9 20.7 20.6 20.7 21.8 23.1 24.1 24.8 24.8 24.9 24.9 24.5 23.9 23.6 23.2 22.7 22.0 22.0 21.6 19.5
POSSIBLE NUMBER OF OBSERVATIONS =720 ACTUAL NUMBER OF OBSERVATIONS =718 DATA RECOVERY RATE =
MONTHLY MEAN =40.2 Deg F
MAXIMUM TEMPERATURE =62.0 Deg F DATE OF OCCURRENCE =11/4 AT 1300 MAXIMUM DAILY MEAN =57.0 Deg F DATE OF OCCURRENCE =11/4
MINIMUM TEMPERATURE =19.5 Deg F DATE OF OCCURRENCE =11/30 AT 0400 MINUMUM DAILY MEAN =23.7 Deg F DATE OF OCCURRENCE =11/26
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
99.7%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Rio Tinto Kennecott Hi-Country
TEMPERATURE in Deg F for DECEMBER, 2023
Hr Beg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hr End 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Day
1 29.4 29.6 29.5 25.5 24.8 25.8 27.3 28.4 28.4 27.9 28.2 28.1 27.3 28.3 28.1 27.7 26.5 25.6 25.3 25.7 25.6 25.7 25.9 28.1 27.2 29.6 24.8
2 28.7 28.1 28.8 30.1 30.3 29.0 28.0 27.4 27.2 28.4 27.9 28.3 29.3 29.2 29.7 30.3 31.0 32.1 34.1 37.0 37.8 38.4 39.4 37.8 31.2 39.4 27.2
3 39.0 36.1 32.6 32.8 33.2 32.4 31.7 31.7 31.7 32.3 33.6 35.1 35.5 36.1 36.2 36.9 37.1 36.6 36.5 37.5 37.9 37.2 37.8 40.3 35.3 40.3 31.7
4 40.9 40.8 40.3 39.2 38.5 38.8 39.2 39.6 40.4 42.6 42.9 42.0 43.6 45.3 45.1 44.6 43.8 42.4 42.5 43.3 43.3 42.5 43.1 43.3 42.0 45.3 38.5
5 43.9 43.4 43.7 43.6 43.0 42.2 43.1 42.0 44.4 45.4 46.8 50.3 50.7 49.4 47.3 47.6 46.3 46.7 47.2 47.6 47.8 46.5 47.8 48.2 46.0 50.7 42.0
6 48.4 48.5 48.4 47.8 47.7 48.2 48.5 48.6 48.7 49.4 50.3 49.6 50.3 50.3 52.8 54.1 52.3 51.1 50.3 49.5 48.2 48.4 50.7 50.5 49.7 54.1 47.7
7 50.8 49.7 48.9 48.1 47.2 47.1 43.3 39.9 40.8 40.3 39.5 38.1 37.7 37.8 35.0 35.1 34.8 34.4 33.6 34.1 33.9 34.5 33.9 34.4 39.7 50.8 33.6
8 33.7 32.2 29.1 30.9 29.4 27.2 27.9 27.6 27.2 27.7 26.6 26.2 25.8 25.0 24.8 25.0 25.6 25.7 25.4 24.7 22.5 21.7 20.9 20.6 26.4 33.7 20.6
9 20.8 20.2 20.5 20.7 20.7 20.2 20.4 20.1 21.1 22.5 24.0 24.2 24.6 25.1 25.2 25.8 24.4 23.6 23.6 23.2 22.7 23.0 23.2 24.2 22.7 25.8 20.1
10 25.2 25.7 25.4 25.8 26.1 28.8 31.3 32.3 31.4 33.9 36.3 34.3 33.8 36.3 35.8 34.3 34.4 36.0 38.1 38.1 35.9 36.0 33.9 36.2 32.7 38.1 25.2
11 37.9 35.1 32.4 31.2 31.9 33.7 34.2 35.6 36.1 36.9 38.4 39.0 37.1 37.5 37.7 35.7 33.5 32.7 33.4 33.7 33.4 31.3 34.5 29.9 34.7 39.0 29.9
12 30.0 33.6 33.6 31.3 30.8 30.0 29.1 30.8 30.0 30.7 31.3 33.0 33.4 33.9 33.7 33.4 33.2 33.3 32.5 32.3 31.8 31.8 32.5 32.9 32.0 33.9 29.1
13 32.2 32.9 32.3 32.4 32.3 32.0 31.7 31.0 32.2 35.0 34.7 35.9 36.9 37.9 38.5 37.7 35.8 35.2 34.6 35.3 34.5 34.2 34.4 33.2 34.3 38.5 31.0
14 32.7 32.8 32.5 31.8 31.5 30.6 30.1 31.4 32.9 35.5 36.5 36.0 35.6 35.1 35.8 35.7 34.5 34.2 34.9 33.4 32.6 32.2 33.6 35.3 33.6 36.5 30.1
15 36.2 36.7 32.8 31.7 32.3 32.6 32.7 33.8 34.6 37.3 36.9 36.9 37.9 37.7 38.4 38.1 35.4 35.2 34.6 34.9 36.2 37.9 37.8 37.1 35.6 38.4 31.7
16 39.2 36.3 35.6 37.0 34.1 35.5 36.2 37.9 38.0 38.1 38.8 39.1 38.7 37.9 38.0 36.8 36.4 34.8 33.6 33.7 36.4 39.9 37.3 37.5 36.9 39.9 33.6
17 38.6 38.3 37.0 36.1 36.0 36.0 32.6 31.1 36.7 39.8 39.2 39.2 37.7 37.0 36.8 36.5 34.6 34.3 39.0 40.6 40.7 39.9 41.6 40.6 37.5 41.6 31.1
18 39.9 39.9 39.6 44.0 42.8 44.3 45.2 43.4 44.9 48.4 47.9 45.5 42.0 40.1 41.6 38.4 42.1 47.4 46.8 45.4 44.4 43.6 44.8 42.5 43.5 48.4 38.4
19 41.8 43.4 47.6 46.5 45.9 45.2 45.7 45.2 43.6 44.1 46.1 48.2 49.0 49.4 49.7 49.7 48.8 48.6 47.9 46.4 45.1 43.6 42.4 44.5 46.2 49.7 41.8
20 41.8 42.8 44.5 45.3 45.5 45.5 45.1 45.4 45.6 45.6 44.9 46.3 46.9 46.7 47.0 46.6 45.3 44.3 44.2 44.2 44.3 44.9 45.3 43.6 45.1 47.0 41.8
21 43.5 44.6 44.3 44.8 43.8 43.4 41.7 41.4 42.8 44.3 45.7 47.3 47.8 49.1 49.4 46.8 45.7 44.5 44.1 42.3 43.5 44.5 43.9 44.0 44.7 49.4 41.4
22 45.3 43.9 42.9 42.7 41.2 42.1 41.6 42.3 42.1 44.4 44.6 44.4 44.5 44.5 44.9 44.8 43.8 44.1 44.2 44.2 43.4 41.9 40.9 40.8 43.3 45.3 40.8
23 40.5 39.8 38.8 38.0 38.7 37.2 32.9 31.4 31.0 31.1 30.2 29.9 28.2 27.1 26.8 25.6 25.2 24.9 24.8 23.0 23.4 22.9 24.0 24.8 30.0 40.5 22.9
24 24.7 24.2 22.8 21.8 22.7 21.9 20.9 20.8 21.8 21.8 22.0 23.5 24.0 25.0 24.9 24.4 23.3 22.2 21.9 21.5 21.4 20.7 20.0 20.1 22.4 25.0 20.0
25 20.3 20.7 19.9 19.9 19.6 20.1 19.8 19.4 20.5 21.5 22.4 22.7 23.9 25.4 25.4 24.6 22.5 20.9 20.6 20.5 20.4 20.9 21.0 20.8 21.4 25.4 19.4
26 20.9 20.1 20.2 20.3 22.1 20.9 20.3 21.3 22.9 24.1 22.0 24.4 25.7 26.2 26.9 27.3 26.3 25.7 25.9 25.3 24.2 24.2 24.3 24.1 23.6 27.3 20.1
27 24.1 24.0 25.0 25.6 25.6 26.9 27.4 28.5 28.0 27.5 28.5 29.4 30.2 31.6 31.9 31.8 31.3 28.6 28.0 27.6 28.8 33.6 32.9 28.5 28.6 33.6 24.0
28 28.2 27.9 28.6 30.7 31.2 32.8 33.6 32.3 33.9 33.2 34.1 34.0 34.8 35.6 34.6 33.5 33.3 35.3 38.7 34.3 34.0 37.8 36.9 38.1 33.6 38.7 27.9
29 37.9 35.2 34.0 35.3 37.6 38.9 40.1 36.8 35.8 37.2 36.8 39.7 40.9 39.9 40.9 41.9 40.2 41.6 40.2 44.3 45.6 46.5 44.9 46.5 40.0 46.5 34.0
30 45.2 43.9 41.6 42.9 44.3 44.7 44.7 44.1 44.6 45.0 45.3 45.7 45.9 47.0 48.0 44.8 44.8 45.1 45.9 44.9 43.9 43.1 42.9 43.2 44.6 48.0 41.6
31 43.3 41.8 41.1 39.2 38.3 36.7 36.6 37.8 39.3 36.7 37.0 36.4 37.6 37.4 37.9 38.0 36.6 35.4 37.6 37.6 37.3 36.5 36.9 36.8 37.9 43.3 35.4
MEAN 35.6 35.2 34.7 34.6 34.5 34.5 34.3 34.2 34.8 35.7 36.1 36.5 36.7 36.9 37.1 36.6 35.8 35.6 35.8 35.7 35.5 35.7 35.8 35.8 35.6
MAX 50.8 49.7 48.9 48.1 47.7 48.2 48.5 48.6 48.7 49.4 50.3 50.3 50.7 50.3 52.8 54.1 52.3 51.1 50.3 49.5 48.2 48.4 50.7 50.5 54.1
MIN 20.3 20.1 19.9 19.9 19.6 20.1 19.8 19.4 20.5 21.5 22.0 22.7 23.9 25.0 24.8 24.4 22.5 20.9 20.6 20.5 20.4 20.7 20.0 20.1 19.4
POSSIBLE NUMBER OF OBSERVATIONS =744 ACTUAL NUMBER OF OBSERVATIONS =744 DATA RECOVERY RATE =
MONTHLY MEAN =35.6 Deg F
MAXIMUM TEMPERATURE =54.1 Deg F DATE OF OCCURRENCE =12/6 AT 1600 MAXIMUM DAILY MEAN =49.7 Deg F DATE OF OCCURRENCE =12/6
MINIMUM TEMPERATURE =19.4 Deg F DATE OF OCCURRENCE =12/25 AT 0800 MINUMUM DAILY MEAN =21.4 Deg F DATE OF OCCURRENCE =12/25
MEANS REQUIRE 75% VALID DATA MISSING DATA DENOTED BY ---
MEAN MAX MIN
100.0%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants
APPENDIX C: EQUIPMENT CALIBRATIONS FOR FOURTH QUARTER
2023
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK C3 Date 12/15/23 Time 13:58
Sampler Model Wedding & Associates S/N A Operator Alex
Pa(mm Hg)631.6 Ta (°C)4.3 Ta (°K)277.5
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.76 24.000 44.824 586.803 0.929 1.079 0.0648
1 2.70 25.280 47.214 584.413 0.925 1.067 0.0641
2 2.65 26.500 49.493 582.134 0.922 1.058 0.0635
3 2.60 27.680 51.696 579.930 0.918 1.048 0.0629
4 2.50 30.180 56.366 575.261 0.911 1.028 0.0617
Operational Flow Rate 20.0 37.353 594.274 0.9409
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.079 1.090 1.0% -4.5%
1.067 1.081 1.3%
1.058 1.075 1.6%
1.048 1.066 1.7%
1.028 1.051 2.2%
1.6%
Sampler Calibration Relationship
1.1142 Lookup Table Validated (I.e., % difference ≤4)
1.1111 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =6.019 b =0.53937 r =0.99975
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1142 m
3/min (Look-up Table) or 1.1111 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK C3 Date 12/15/23 Time 14:05
Sampler Model Wedding & Associates S/N B Operator Alex
Pa(mm Hg)631.5 Ta (°C)4.3 Ta (°K)277.5
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.80 23.300 43.516 587.961 0.931 1.087 0.0652
1 2.75 24.130 45.066 586.411 0.929 1.077 0.0647
2 2.70 24.600 45.944 585.533 0.927 1.068 0.0641
3 2.65 25.930 48.428 583.049 0.923 1.058 0.0635
4 2.60 27.450 51.267 580.210 0.919 1.048 0.0629
Operational Flow Rate 19.6 36.606 594.871 0.9420
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.087 1.097 1.0% -3.8%
1.077 1.0925 1.4%
1.068 1.088 1.9%
1.058 1.0782 1.9%
1.048 1.0685 1.9%
1.6%
Sampler Calibration Relationship
1.1215 Lookup Table Validated (I.e., % difference ≤4)
1.1198 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =5.167 b =0.59469 r =0.98012
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1215 m
3/min (Look-up Table) or 1.1198 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK C3 Date 12/15/23 Time 14:10
Sampler Model Wedding & Associates S/N C Operator Alex
Pa(mm Hg)631.5 Ta (°C)4.3 Ta (°K)277.5
Wx Cond:Sunny and clear.
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.85 21.600 40.341 591.136 0.936 1.096 0.0658
1 2.80 22.960 42.881 588.596 0.932 1.087 0.0652
2 2.75 24.500 45.757 585.720 0.928 1.077 0.0647
3 2.68 25.880 48.335 583.142 0.923 1.064 0.0639
4 2.62 27.600 51.547 579.930 0.918 1.052 0.0632
Operational Flow Rate 18.2 34.066 597.411 0.9461
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.096 1.106 0.9% -3.0%
1.087 1.0973 1.0%
1.077 1.088 1.0%
1.064 1.0761 1.2%
1.052 1.0639 1.1%
1.0%
Sampler Calibration Relationship
1.1274 Lookup Table Validated (I.e., % difference ≤4)
1.1220 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =6.588 b =0.50226 r =0.99765
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1274 m
3/min (Look-up Table) or 1.1220 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK C3 Date 12/15/23 Time 14:15
Sampler Model Wedding & Associates S/N D Operator Alex
Pa(mm Hg)631.5 Ta (°C)4.3 Ta (°K)277.5
Wx Cond:Sunny and clear.
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.85 20.550 38.380 593.097 0.939 1.096 0.0658
1 2.80 21.980 41.051 590.426 0.935 1.087 0.0652
2 2.73 23.960 44.749 586.728 0.929 1.073 0.0644
3 2.65 25.190 47.046 584.431 0.925 1.058 0.0635
4 2.50 28.630 53.471 578.006 0.915 1.028 0.0617
Operational Flow Rate 16.7 31.134 600.343 0.9507
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.096 1.115 1.7% -3.0%
1.087 1.1069 1.9%
1.073 1.094 1.9%
1.058 1.0852 2.6%
1.028 1.0627 3.3%
2.3%
Sampler Calibration Relationship
1.1394 Lookup Table Validated (I.e., % difference ≤4)
1.1320 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =5.729 b =0.56131 r =0.99577
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1394 m
3/min (Look-up Table) or 1.1320 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK C3 Date 8/17/23 Time 12:13
Sampler Model Wedding & Associates S/N E Operator Alex
Pa(mm Hg)626.2 Ta (°C)29.4 Ta (°K)302.6
Wx Cond:Sunny, breezy
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.31 22.900 42.769 583.457 0.932 1.036 0.0596
1 2.26 24.690 46.112 580.114 0.926 1.025 0.0589
2 2.20 25.400 47.438 578.788 0.924 1.012 0.0582
3 2.15 26.450 49.399 576.827 0.921 1.001 0.0575
4 2.10 27.770 51.865 574.362 0.917 0.989 0.0569
Operational Flow Rate 20.2 37.652 588.575 0.9399
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.036 1.141 10.1% -8.3%
1.025 1.1267 9.9%
1.012 1.122 10.8%
1.001 1.1141 11.3%
0.989 1.104 11.6%
10.8%
Sampler Calibration Relationship
1.1458 Lookup Table Validated (I.e., % difference ≤4)
1.0674 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =5.012 b =0.63230 r =0.98780
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1458 m
3/min (Look-up Table) or 1.0674 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 11:25
Sampler Model Wedding & Associates S/N A Operator Alex L
Pa(mm Hg)620.4 Ta (°C)2.3 Ta (°K)275.5
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.82 24.130 45.066 575.334 0.927 1.096 0.0660
1 2.78 25.100 46.878 573.522 0.924 1.088 0.0656
2 2.73 29.770 55.600 564.800 0.910 1.079 0.0650
3 2.60 36.920 68.954 551.446 0.889 1.053 0.0635
4 2.45 41.420 77.358 543.042 0.875 1.023 0.0617
Operational Flow Rate 18.9 35.299 585.101 0.9431
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.096 1.097 0.1% -3.0%
1.088 1.094 0.5%
1.079 1.080 0.1%
1.053 1.059 0.5%
1.023 1.045 2.1%
0.7%
Sampler Calibration Relationship
1.1180 Lookup Table Validated (I.e., % difference ≤4)
1.1185 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =12.452 b =0.10397 r =0.98336
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1180 m
3/min (Look-up Table) or 1.1185 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 11:34
Sampler Model Tisch Environmental S/N B Operator Alex
Pa(mm Hg)620.4 Ta (°C)3.1 Ta (°K)276.3
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.85 23.580 44.039 576.361 0.929 1.103 0.0664
1 2.81 25.260 47.177 573.223 0.924 1.096 0.0659
2 2.75 27.800 51.921 568.479 0.916 1.084 0.0652
3 2.70 32.280 60.288 560.112 0.903 1.075 0.0647
4 2.51 38.220 71.381 549.019 0.885 1.037 0.0624
Operational Flow Rate 20.2 37.726 582.674 0.9392
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.103 1.091 -1.1% -2.4%
1.096 1.086 -0.9%
1.084 1.078 -0.6%
1.075 1.065 -0.9%
1.037 1.047 1.0%
-0.5%
Sampler Calibration Relationship
1.1030 Lookup Table Validated (I.e., % difference ≤4)
1.1200 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =11.246 b =0.18135 r =0.98417
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1030
m3/min (Look-up Table) or 1.1200 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 11:52
Sampler Model Tisch Environmental S/N C Operator: Alex
Pa(mm Hg)620.3 Ta (°C)3.0 Ta (°K)276.2
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.94 23.820 44.487 575.813 0.928 1.120 0.0674
1 2.89 26.000 48.559 571.741 0.922 1.111 0.0668
2 2.85 27.690 51.715 568.585 0.917 1.103 0.0664
3 2.80 32.000 59.765 560.535 0.904 1.094 0.0658
4 2.50 41.630 77.750 542.550 0.875 1.035 0.0623
Operational Flow Rate 21.4 39.968 580.332 0.9356
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.120 1.094 -2.3% -0.9%
1.111 1.088 -2.0%
1.103 1.083 -1.8%
1.094 1.07 -2.2%
1.035 1.041 0.6%
-1.6%
Sampler Calibration Relationship
1.1040 Lookup Table Validated (I.e., % difference ≤4)
1.1352 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =10.346 b =0.22879 r =0.98691
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1040 m
3/min (Look-up Table) or 1.1352 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 11:56
Sampler Model Tisch Environmental S/N D Operator Alex
Pa(mm Hg)620.2 Ta (°C)3.0 Ta (°K)276.2
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.87 23.670 44.207 576.023 0.929 1.107 0.0666
1 2.80 24.850 46.411 573.819 0.925 1.094 0.0658
2 2.75 28.280 52.817 567.413 0.915 1.084 0.0652
3 2.70 31.190 58.252 561.978 0.906 1.075 0.0647
4 2.65 34.920 65.218 555.012 0.895 1.065 0.0641
Operational Flow Rate 19.2 35.859 584.371 0.9422
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.107 1.098 -0.8% -2.0%
1.094 1.094 0.0%
1.084 1.084 0.0%
1.075 1.075 0.0%
1.065 1.064 -0.1%
-0.2%
Sampler Calibration Relationship
1.1140 Lookup Table Validated (I.e., % difference ≤4)
1.1191 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =13.712 b =0.01880 r =0.97621
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1140 m
3/min (Look-up Table) or 1.1191 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 12:02
Sampler Model Tisch Environmental S/N E Operator Alex
Pa(mm Hg)620.2 Ta (°C)3.2 Ta (°K)276.4
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.80 23.450 43.796 576.404 0.929 1.094 0.0658
1 2.75 26.150 48.839 571.361 0.921 1.085 0.0652
2 2.69 28.930 54.031 566.169 0.913 1.073 0.0645
3 2.64 31.830 59.447 560.753 0.904 1.063 0.0640
4 2.45 37.570 70.168 550.033 0.887 1.025 0.0617
Operational Flow Rate 19.3 36.046 584.154 0.9419
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.094 1.103 0.8% -3.2%
1.085 1.095 1.0%
1.073 1.087 1.3%
1.063 1.078 1.4%
1.025 1.061 3.5%
1.6%
Sampler Calibration Relationship
1.1190 Lookup Table Validated (I.e., % difference ≤4)
1.1190 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =10.110 b =0.26136 r =0.98762
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1190 m
3/min (Look-up Table) or 1.1190 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 12:12
Sampler Model Tisch Environmental S/N F Operator Alex
Pa(mm Hg)620.2 Ta (°C)3.1 Ta (°K)276.3
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.89 23.890 44.618 575.582 0.928 1.111 0.0668
1 2.80 27.460 51.286 568.914 0.917 1.094 0.0658
2 2.75 30.800 57.524 562.676 0.907 1.084 0.0652
3 2.65 35.380 66.077 554.123 0.893 1.065 0.0641
4 2.53 40.560 75.752 544.448 0.878 1.041 0.0626
Operational Flow Rate 19.4 36.232 583.968 0.9416
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.111 1.084 -2.4% -1.7%
1.094 1.073 -1.9%
1.084 1.063 -2.0%
1.065 1.049 -1.5%
1.041 1.034 -0.7%
-1.7%
Sampler Calibration Relationship
1.1010 Lookup Table Validated (I.e., % difference ≤4)
1.1294 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =12.155 b =0.11564 r =0.99796
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1010 m
3/min (Look-up Table) or 1.1294 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 12:17
Sampler Model Tisch Environmental S/N G Operator Alex
Pa(mm Hg)620.2 Ta (°C)3.3 Ta (°K)276.5
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.91 24.250 45.290 574.910 0.927 1.115 0.0671
1 2.85 26.380 49.269 570.931 0.921 1.104 0.0664
2 2.79 29.040 54.236 565.964 0.913 1.092 0.0657
3 2.65 35.000 65.368 554.832 0.895 1.065 0.0641
4 2.50 39.000 72.838 547.362 0.883 1.036 0.0623
Operational Flow Rate 20.0 37.260 582.940 0.9399
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.115 1.098 -1.5% -1.3%
1.104 1.092 -1.1%
1.092 1.084 -0.8%
1.065 1.066 0.1%
1.036 1.054 1.8%
-0.3%
Sampler Calibration Relationship
1.1140 Lookup Table Validated (I.e., % difference ≤4)
1.1392 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =9.515 b =0.28798 r =0.99447
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1140 m
3/min (Look-up Table) or 1.1392 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DATA SHEET
Station Location RTK Hi Country Date 12/15/23 Time 12:21
Sampler Model Tisch Environmental S/N H Operator Alex
Pa(mm Hg)620.2 Ta (°C)3.4 Ta (°K)276.6
Wx Cond:Sunny
Orifice S/N 2023 Calibration Date 1/5/2023
Orifice cal relationship: m=1.04634 b =-0.0279 r =0.99997
Plate No. Orifice ΔPstg ΔPstg P1 = Pa - ΔPstg P1/Pa Qa (Orifice) Qa (Orifice)
ΔH2O (in H20)(mm Hg) (mm Hg) (mm Hg)
flow rate b [Ta]1/2
(in)(m3/min)
open 2.85 23.970 44.768 575.433 0.928 1.104 0.0664
1 2.80 25.900 48.372 571.828 0.922 1.095 0.0658
2 2.75 27.550 51.454 568.746 0.917 1.085 0.0652
3 2.67 32.330 60.381 559.819 0.903 1.069 0.0643
4 2.55 36.920 68.954 551.246 0.889 1.046 0.0629
Operational Flow Rate 19.6 36.606 583.594 0.9410
(a) mm Hg =25.4 (in. H2O/13.6)Qa Qa (Sampler) % REF % Design
(b) Qa(Orifice) = {[ΔH20)(Ta/Pa)]1/2 - b} {1/m}(Orifice) (Lookup Table)
Difference c Difference c
(c) % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 1.104 1.095 -0.8% -2.3%
1.095 1.089 -0.5%
1.085 1.084 -0.1%
1.069 1.070 0.1%
1.046 1.056 1.0%
-0.1%
Sampler Calibration Relationship
1.1110 Lookup Table Validated (I.e., % difference ≤4)
1.1224 New Calibration Relationship
X = Qa (orifice)/[Ta]1/2
Y = (P1/Pa)
m =11.439 b =0.16895 r =0.99620
For subsequent calculation of sampler flow rate :
Qa = {[P1/Pa - b][Ta]1/2} {1/m}
Operational Flow Rate: 1.1110 m
3/min (Look-up Table) or 1.1224 (Using new m & b)
VFC HIVOL PM10 SAMPLER CALIBRATION
AVERAGE
CAL criteria: < 10.1%
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
Trinity Consultants
APPENDIX D: PM10 MONTHLY FLOW CHECKS FOR FOURTH QUARTER
2023

DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 10/20/2023 Time 11:00
Sampler Model S/N A Operator RTK
Pa(mm Hg)627.7 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.76 in. of H20Qa(orifice)a 1.1123 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.4 in H20 21.4 in H20
Stagnation Pressure (ΔPstg)47.438 mm Hg 39.968 mm Hg
Absolute Stagnation Pressure (P1)b 580.2618 mm Hg 587.7324 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.924 (see note) 0.936 (see note)
Qa (sampler) c 1.1098 m3/min 1.1356 m3/min
QC - Check Percentage Difference d -0.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1382 m3/min
Design flow rate percentage difference f 0.7 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100)where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Mike Peterson
Pass
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/22/2023 Time 11:00
Sampler Model S/N A Operator RTK
Pa(mm Hg)619.8 Ta (°C)15.5 Ta (°K)288.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.80 in. of H20Qa(orifice)a 1.1177 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.4 in H20 21.4 in H20
Stagnation Pressure (ΔPstg)47.438 mm Hg 39.968 mm Hg
Absolute Stagnation Pressure (P1)b 572.3618 mm Hg 579.8324 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.936 (see note)
Qa (sampler) c 1.0981 m3/min 1.1259 m3/min
QC - Check Percentage Difference d -1.8 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1457 m3/min
Design flow rate percentage difference f 1.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
Pass
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 12/4/2023 Time 11:00
Sampler Model S/N A Operator RTK
Pa(mm Hg)629.3 Ta (°C)6.9 Ta (°K)279.9
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.88 in. of H20Qa(orifice)a 1.1083 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.1 in H20 20.2 in H20
Stagnation Pressure (ΔPstg)45.010 mm Hg 37.652 mm Hg
Absolute Stagnation Pressure (P1)b 584.2897 mm Hg 591.6482 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.928 (see note) 0.940 (see note)
Qa (sampler) c 1.0917 m3/min 1.1166 m3/min
QC - Check Percentage Difference d -1.5 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1333 m3/min
Design flow rate percentage difference f 0.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
Pass
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 10/20/2023 Time 11:05
Sampler Model S/N B Operator RTK
Pa(mm Hg)627.7 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1005 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.1 in H20 21.2 in H20
Stagnation Pressure (ΔPstg)46.878 mm Hg 39.501 mm Hg
Absolute Stagnation Pressure (P1)b 580.8221 mm Hg 588.1993 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.937 (see note)
Qa (sampler) c 1.1141 m3/min 1.1425 m3/min
QC - Check Percentage Difference d 1.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1284 m3/min
Design flow rate percentage difference f -0.1 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 10/20/2023 Time 11:05
Sampler Model S/N B Operator RTK
Pa(mm Hg)619.8 Ta (°C)15.5 Ta (°K)288.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.74 in. of H20Qa(orifice)a 1.1060 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.1 in H20 21.2 in H20
Stagnation Pressure (ΔPstg)46.878 mm Hg 39.501 mm Hg
Absolute Stagnation Pressure (P1)b 572.9221 mm Hg 580.2993 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.924 (see note) 0.936 (see note)
Qa (sampler) c 1.1021 m3/min 1.1305 m3/min
QC - Check Percentage Difference d -0.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1344 m3/min
Design flow rate percentage difference f 0.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 12/4/2023 Time 11:05
Sampler Model S/N B Operator RTK
Pa(mm Hg)629.3 Ta (°C)6.9 Ta (°K)279.9
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.88 in. of H20Qa(orifice)a 1.1083 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.5 in H20 19.7 in H20
Stagnation Pressure (ΔPstg)43.834 mm Hg 36.718 mm Hg
Absolute Stagnation Pressure (P1)b 585.4663 mm Hg 592.5821 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.930 (see note) 0.942 (see note)
Qa (sampler) c 1.0992 m3/min 1.1260 m3/min
QC - Check Percentage Difference d -0.8 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1353 m3/min
Design flow rate percentage difference f 0.5 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 10/20/2023 Time 11:09
Sampler Model S/N C Operator RTK
Pa(mm Hg)627.7 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.80 in. of H20Qa(orifice)a 1.1202 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.6 in H20 21.4 in H20
Stagnation Pressure (ΔPstg)47.812 mm Hg 39.968 mm Hg
Absolute Stagnation Pressure (P1)b 579.8882 mm Hg 587.7324 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.924 (see note) 0.936 (see note)
Qa (sampler) c 1.1094 m3/min 1.1379 m3/min
QC - Check Percentage Difference d -1.0 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1489 m3/min
Design flow rate percentage difference f 1.7 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/22/2023 Time 11:09
Sampler Model S/N C Operator RTK
Pa(mm Hg)619.8 Ta (°C)15.5 Ta (°K)288.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.0981 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.6 in H20 21.4 in H20
Stagnation Pressure (ΔPstg)47.812 mm Hg 39.968 mm Hg
Absolute Stagnation Pressure (P1)b 571.9882 mm Hg 579.8324 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.936 (see note)
Qa (sampler) c 1.0975 m3/min 1.1282 m3/min
QC - Check Percentage Difference d -0.1 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1288 m3/min
Design flow rate percentage difference f -0.1 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 12/4/2023 Time 11:09
Sampler Model S/N C Operator RTK
Pa(mm Hg)629.3 Ta (°C)6.9 Ta (°K)279.9
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.90 in. of H20Qa(orifice)a 1.1121 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.2 in H20 19.35 in H20
Stagnation Pressure (ΔPstg)43.385 mm Hg 36.139 mm Hg
Absolute Stagnation Pressure (P1)b 585.9146 mm Hg 593.1610 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.931 (see note) 0.943 (see note)
Qa (sampler) c 1.0994 m3/min 1.1257 m3/min
QC - Check Percentage Difference d -1.1 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1385 m3/min
Design flow rate percentage difference f 0.8 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
:
Station Location Date 10/20/2023 Time 11:11
Sampler Model S/N D Operator RTK
Pa(mm Hg)627.7 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.74 in. of H20Qa(orifice)a 1.1084 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.5 21.5 in H20
Stagnation Pressure (ΔPstg)47.625 mm Hg 40.154 mm Hg
Absolute Stagnation Pressure (P1)b 580.0750 mm Hg 587.5456 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.924 (see note) 0.936 (see note)
Qa (sampler) c 1.1140 m3/min 1.1408 m3/min
QC - Check Percentage Difference d 0.5 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1350 m3/min
Design flow rate percentage difference f 0.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
:
Station Location Date 11/22/2023 Time 11:11
Sampler Model S/N D Operator RTK
Pa(mm Hg)619.8 Ta (°C)15.5 Ta (°K)288.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.77 in. of H20Qa(orifice)a 1.1119 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.5 21.5 in H20
Stagnation Pressure (ΔPstg)47.625 mm Hg 40.154 mm Hg
Absolute Stagnation Pressure (P1)b 572.1750 mm Hg 579.6456 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.935 (see note)
Qa (sampler) c 1.1022 m3/min 1.1289 m3/min
QC - Check Percentage Difference d -0.9 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1387 m3/min
Design flow rate percentage difference f 0.8 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
:
Station Location Date 12/4/2023 Time 11:11
Sampler Model S/N D Operator RTK
Pa(mm Hg)629.3 Ta (°C)6.9 Ta (°K)279.9
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.90 in. of H20Qa(orifice)a 1.1121 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.1 20.0 in H20
Stagnation Pressure (ΔPstg)45.010 mm Hg 37.297 mm Hg
Absolute Stagnation Pressure (P1)b 584.2897 mm Hg 592.0031 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.928 (see note) 0.941 (see note)
Qa (sampler) c 1.0962 m3/min 1.1239 m3/min
QC - Check Percentage Difference d -1.4 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1399 m3/min
Design flow rate percentage difference f 0.9 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 10/20/2023 Time 11:14
Sampler Model S/N E Operator RTK
Pa(mm Hg)627.7 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.55 in. of H20Qa(orifice)a 1.0702 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.3 in H20 20.5 in H20
Stagnation Pressure (ΔPstg)45.384 mm Hg 38.193 mm Hg
Absolute Stagnation Pressure (P1)b 582.3162 mm Hg 589.5066 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.928 (see note) 0.939 (see note)
Qa (sampler) c 1.1148 m3/min 1.1401 m3/min
QC - Check Percentage Difference d 4.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.0926 m3/min
Design flow rate percentage difference f -3.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 10/20/2023 Time 11:33
Sampler Model S/N E Operator RTK
Pa(mm Hg)627.7 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: Pass/Fail?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.40 in. of H20Qa(orifice)a 1.039 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.0 in H20 20.3 in H20
Stagnation Pressure (ΔPstg)44.824 mm Hg 37.913 mm Hg
Absolute Stagnation Pressure (P1)b 582.8765 mm Hg 589.7868 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.940 (see note)
Qa (sampler) c 1.1148 m3/min 1.1401 m3/min
QC - Check Percentage Difference d 7.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.0570 m3/min
Design flow rate percentage difference f -6.5 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100)where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Mike Peterson
PASS
As left
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:25
Sampler Model S/N A Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.2 in H20 20.8 in H20
Stagnation Pressure (ΔPstg)47.065 mm Hg 38.754 mm Hg
Absolute Stagnation Pressure (P1)b 567.7353 mm Hg 576.0463 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.937 (see note)
Qa (sampler) c 1.1260 m3/min 1.1400 m3/min
QC - Check Percentage Difference d 1.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1253 m3/min
Design flow rate percentage difference f -0.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 13:00
Sampler Model S/N A Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.71 in. of H20Qa(orifice)a 1.0961 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.2 in H20 20.8 in H20
Stagnation Pressure (ΔPstg)47.065 mm Hg 38.754 mm Hg
Absolute Stagnation Pressure (P1)b 567.7353 mm Hg 576.0463 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.937 (see note)
Qa (sampler) c 1.10900 m3/min 1.1250 m3/min
QC - Check Percentage Difference d 1.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1118 m3/min
Design flow rate percentage difference f -1.6 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:25
Sampler Model S/N A Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)3.00 in. of H20Qa(orifice)a 1.1399 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.2 in H20 19.8 in H20
Stagnation Pressure (ΔPstg)45.122 mm Hg 36.979 mm Hg
Absolute Stagnation Pressure (P1)b 572.1776 mm Hg 580.3206 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.927 (see note) 0.940 (see note)
Qa (sampler) c 1.1260 m3/min 1.1380 m3/min
QC - Check Percentage Difference d -1.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1519 m3/min
Design flow rate percentage difference f 1.9 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:28
Sampler Model S/N B Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.65 in. of H20Qa(orifice)a 1.1016 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.8 in H20 20.6 in H20
Stagnation Pressure (ΔPstg)46.318 mm Hg 38.474 mm Hg
Absolute Stagnation Pressure (P1)b 568.4824 mm Hg 576.3265 mm Hg
Stagnation Pressure Ratio (P1/Pa)lookup table 0.925 (see note) 0.937 (see note)
Qa (sampler) c 1.1180 m3/min 1.132 m3/min
QC - Check Percentage Difference d 1.5 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1151 m3/min
Design flow rate percentage difference f -1.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 13:10
Sampler Model S/N B Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.0942 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.8 in H20 20.6 in H20
Stagnation Pressure (ΔPstg)46.318 mm Hg 38.474 mm Hg
Absolute Stagnation Pressure (P1)b 568.4824 mm Hg 576.3265 mm Hg
Stagnation Pressure Ratio (P1/Pa)lookup table 0.925 (see note) 0.937 (see note)
Qa (sampler) c 1.1010 m3/min 1.115 m3/min
QC - Check Percentage Difference d 0.6 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1080 m3/min
Design flow rate percentage difference f -1.9 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:28
Sampler Model S/N B Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.83 in. of H20Qa(orifice)a 1.1079 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.9 in H20 19.66 in H20
Stagnation Pressure (ΔPstg)44.711 mm Hg 36.718 mm Hg
Absolute Stagnation Pressure (P1)b 572.5885 mm Hg 580.5821 mm Hg
Stagnation Pressure Ratio (P1/Pa)lookup table 0.928 (see note) 0.941 (see note)
Qa (sampler) c 1.095 m3/min 1.111 m3/min
QC - Check Percentage Difference d -1.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1239 m3/min
Design flow rate percentage difference f -0.5 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:31
Sampler Model S/N C Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.8 in H20 20.5 in H20
Stagnation Pressure (ΔPstg)46.318 mm Hg 38.287 mm Hg
Absolute Stagnation Pressure (P1)b 568.4824 mm Hg 576.5132 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.938 (see note)
Qa (sampler) c 1.1220 m3/min 1.138 m3/min
QC - Check Percentage Difference d 0.9 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1274 m3/min
Design flow rate percentage difference f -0.2 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 14:31
Sampler Model S/N C Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.73 in. of H20Qa(orifice)a 1.1001 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.8 in H20 20.5 in H20
Stagnation Pressure (ΔPstg)46.318 mm Hg 38.287 mm Hg
Absolute Stagnation Pressure (P1)b 568.4824 mm Hg 576.5132 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.938 (see note)
Qa (sampler) c 1.1050 m3/min 1.120 m3/min
QC - Check Percentage Difference d 0.4 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1150 m3/min
Design flow rate percentage difference f -1.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:31
Sampler Model S/N C Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.93 in. of H20Qa(orifice)a 1.1268 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.2 in H20 19.74 in H20
Stagnation Pressure (ΔPstg)45.104 mm Hg 36.867 mm Hg
Absolute Stagnation Pressure (P1)b 572.1963 mm Hg 580.4326 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.927 (see note) 0.940 (see note)
Qa (sampler) c 1.098 m3/min 1.114 m3/min
QC - Check Percentage Difference d -2.6 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1425 m3/min
Design flow rate percentage difference f 1.1 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:34
Sampler Model S/N D Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.8 in H20 20.6 in H20
Stagnation Pressure (ΔPstg)46.318 mm Hg 38.474 mm Hg
Absolute Stagnation Pressure (P1)b 568.4824 mm Hg 576.3265 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.937 (see note) lookup table
Qa (sampler) c 1.1260 m3/min 1.140 m3/min
QC - Check Percentage Difference d 1.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1253 m3/min
Design flow rate percentage difference f -0.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator: NOTES:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 14:34
Sampler Model S/N D Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.75 in. of H20Qa(orifice)a 1.1040 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.8 in H20 20.6 in H20
Stagnation Pressure (ΔPstg)46.318 mm Hg 38.474 mm Hg
Absolute Stagnation Pressure (P1)b 568.4824 mm Hg 576.3265 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.937 (see note) lookup table
Qa (sampler) c 1.1090 m3/min 1.122 m3/min
QC - Check Percentage Difference d 0.5 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1169 m3/min
Design flow rate percentage difference f -1.2 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator: NOTES:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:34
Sampler Model S/N D Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.84 in. of H20Qa(orifice)a 1.1098 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.0 in H20 19.7 in H20
Stagnation Pressure (ΔPstg)44.824 mm Hg 36.793 mm Hg
Absolute Stagnation Pressure (P1)b 572.4765 mm Hg 580.5074 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.927 (see note) 0.940 (see note) lookup table
Qa (sampler) c 1.101 m3/min 1.117 m3/min
QC - Check Percentage Difference d -0.8 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1259 m3/min
Design flow rate percentage difference f -0.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator: NOTES:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:36
Sampler Model S/N E Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.6 in H20 20.1 in H20
Stagnation Pressure (ΔPstg)45.851 mm Hg 37.540 mm Hg
Absolute Stagnation Pressure (P1)b 568.9493 mm Hg 577.2603 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.939 (see note)lookup table
Qa (sampler) c 1.1300 m3/min 1.147 m3/min
QC - Check Percentage Difference d 1.6 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1281 m3/min
Design flow rate percentage difference f -0.2 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 14:36
Sampler Model S/N E Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.73 in. of H20Qa(orifice)a 1.1001 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.6 in H20 20.1 in H20
Stagnation Pressure (ΔPstg)45.851 mm Hg 37.540 mm Hg
Absolute Stagnation Pressure (P1)b 568.9493 mm Hg 577.2603 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.939 (see note)lookup table
Qa (sampler) c 1.1130 m3/min 1.129 m3/min
QC - Check Percentage Difference d 1.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1157 m3/min
Design flow rate percentage difference f -1.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:36
Sampler Model S/N E Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.75 in. of H20Qa(orifice)a 1.0925 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.9 in H20 19.61 in H20
Stagnation Pressure (ΔPstg)44.693 mm Hg 36.625 mm Hg
Absolute Stagnation Pressure (P1)b 572.6072 mm Hg 580.6754 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.928 (see note) 0.941 (see note)lookup table
Qa (sampler) c 1.107 m3/min 1.123 m3/min
QC - Check Percentage Difference d 1.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1081 m3/min
Design flow rate percentage difference f -1.9 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:38
Sampler Model S/N F Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.65 in. of H20Qa(orifice)a 1.1016 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.6 in H20 21.7 in H20
Stagnation Pressure (ΔPstg)45.944 mm Hg 40.528 mm Hg
Absolute Stagnation Pressure (P1)b 568.8559 mm Hg 574.2721 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.934 (see note)
Qa (sampler) c 1.1120 m3/min 1.122 m3/min
QC - Check Percentage Difference d 0.9 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1114 m3/min
Design flow rate percentage difference f -1.6 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 14:38
Sampler Model S/N F Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.0942 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.6 in H20 21.7 in H20
Stagnation Pressure (ΔPstg)45.944 mm Hg 40.528 mm Hg
Absolute Stagnation Pressure (P1)b 568.8559 mm Hg 574.2721 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.925 (see note) 0.934 (see note)
Qa (sampler) c 1.0950 m3/min 1.105 m3/min
QC - Check Percentage Difference d 0.1 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1042 m3/min
Design flow rate percentage difference f -2.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:38
Sampler Model S/N F Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.92 in. of H20Qa(orifice)a 1.125 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.2 in H20 19.9 in H20
Stagnation Pressure (ΔPstg)45.160 mm Hg 37.166 mm Hg
Absolute Stagnation Pressure (P1)b 572.1403 mm Hg 580.1338 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.927 (see note) 0.940 (see note)
Qa (sampler) c 1.088 m3/min 1.103 m3/min
QC - Check Percentage Difference d -3.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1392 m3/min
Design flow rate percentage difference f 0.8 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:41
Sampler Model S/N G Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.3 in H20 20.9 in H20
Stagnation Pressure (ΔPstg)47.251 mm Hg 39.034 mm Hg
Absolute Stagnation Pressure (P1)b 567.5485 mm Hg 575.7662 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.937 (see note)
Qa (sampler) c 1.1260 m3/min 1.142 m3/min
QC - Check Percentage Difference d 1.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1273 m3/min
Design flow rate percentage difference f -0.2 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 14:41
Sampler Model S/N G Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.0942 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.3 in H20 20.9 in H20
Stagnation Pressure (ΔPstg)47.251 mm Hg 39.034 mm Hg
Absolute Stagnation Pressure (P1)b 567.5485 mm Hg 575.7662 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.923 (see note) 0.937 (see note)
Qa (sampler) c 1.109 m3/min 1.124 m3/min
QC - Check Percentage Difference d 1.4 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1088 m3/min
Design flow rate percentage difference f -1.9 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:41
Sampler Model S/N G Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.84 in. of H20Qa(orifice)a 1.1098 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.3 in H20 19.93 in H20
Stagnation Pressure (ΔPstg)45.384 mm Hg 37.222 mm Hg
Absolute Stagnation Pressure (P1)b 571.9162 mm Hg 580.0778 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.926 (see note) 0.940 (see note)
Qa (sampler) c 1.103 m3/min 1.119 m3/min
QC - Check Percentage Difference d -0.6 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1259 m3/min
Design flow rate percentage difference f -0.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 10/20/2023 Time 14:43
Sampler Model S/N H Operator RTK
Pa(mm Hg)614.8 Ta (°C)20.5 Ta (°K)293.5
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.70 in. of H20Qa(orifice)a 1.1117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.1 in H20 20.75 in H20
Stagnation Pressure (ΔPstg)46.878 mm Hg 38.754 mm Hg
Absolute Stagnation Pressure (P1)b 567.9221 mm Hg 576.0463 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.924 (see note) 0.937 (see note)
Qa (sampler) c 1.1230 m3/min 1.138 m3/min
QC - Check Percentage Difference d 1.0 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1264 m3/min
Design flow rate percentage difference f -0.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Mike Peterson
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/22/2023 Time 14:43
Sampler Model S/N H Operator RTK
Pa(mm Hg)614.8 Ta (°C)11.1 Ta (°K)284.1
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.76 in. of H20Qa(orifice)a 1.1060 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)25.1 in H20 20.75 in H20
Stagnation Pressure (ΔPstg)46.878 mm Hg 38.754 mm Hg
Absolute Stagnation Pressure (P1)b 567.9221 mm Hg 576.0463 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.924 (see note) 0.937 (see note)
Qa (sampler) c 1.105 m3/min 1.120 m3/min
QC - Check Percentage Difference d -0.1 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1210 m3/min
Design flow rate percentage difference f -0.8 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 12/4/2023 Time 14:43
Sampler Model S/N H Operator RTK
Pa(mm Hg)617.3 Ta (°C)6.2 Ta (°K)279.2
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 2023 CAL Calibration Date
Orifice cal relationship: m=1.04634 b =-0.02788 r =0.99997
Orifice Press. Drop (ΔH2O)2.82 in. of H20Qa(orifice)a 1.1060 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.1 in H20 19.86 in H20
Stagnation Pressure (ΔPstg)45.085 mm Hg 37.091 mm Hg
Absolute Stagnation Pressure (P1)b 572.2150 mm Hg 580.2085 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.927 (see note) 0.940 (see note)
Qa (sampler) c 1.099 m3/min 1.115 m3/min
QC - Check Percentage Difference d -0.6 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1220 m3/min
Design flow rate percentage difference f -0.7 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100)where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
Calibrator:
VFC HIVOL PM10 FLOW CHECK/CAL SHEET
RTK Hi Country
Tisch
1/5/2023
Tyson John
PASS
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Rio Tinto Kennecott / Fourth Quarter 2023 Summary Report
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APPENDIX E: PERFORMANCE AUDIT REPORT FOURTH QUARTER 2023

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PERFORMANCE AUDIT OF
PARTICULATE AND METEOROLOGICAL
MONITORING EQUIPMENT AT
RIO TINTO KENNECOTT’S
COPPERTON AND HI-COUNTRY
MONITORING STATIONS
NOVEMBER 2023
Prepared By:
TRINITY CONSULTANTS
4525 Wasatch Blvd.
Suite 200
Salt Lake City, Utah
801-272-3000
November 2023
Project No. 234501.0019
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Trinity Consultants i
TABLE OF CONTENTS
 INTRODUCTION 1-1 
 PERFORMANCE AUDIT EQUIPMENT 2-1 
 PERFORMANCE AUDIT PROCEDURES 3-1 
3.1 Copperton C3 and Hi-Country Monitoring Sites ........................................................ 3-1 
3.2 Performance Audit Methods ..................................................................................... 3-2 
3.2.1 PM10 .......................................................................................................................... 3-2 
3.2.2 Wind Direction ........................................................................................................... 3-3 
3.2.3 Horizontal Wind Speed ............................................................................................... 3-3 
3.2.4 Temperature .............................................................................................................. 3-3 
3.2.5 Relative Humidity ....................................................................................................... 3-3 
3.2.6 Barometric Pressure ................................................................................................... 3-3 
3.2.7 Precipitation .............................................................................................................. 3-3 
 PERFORMANCE AUDIT RESULTS 4-1 
4.1 Copperton C3 Monitoring Station ............................................................................. 4-1 
4.1.1 PM10 .......................................................................................................................... 4-1 
4.1.2 Wind Direction ........................................................................................................... 4-1 
4.1.3 Wind Speed ............................................................................................................... 4-2 
4.1.4 Temperature .............................................................................................................. 4-2 
4.1.5 Relative Humidity ....................................................................................................... 4-2 
4.1.6 Barometric Pressure ................................................................................................... 4-2 
4.1.7 Precipitation .............................................................................................................. 4-2 
4.2 Hi-Country Monitoring Station ................................................................................. 4-2 
4.2.1 PM10 .......................................................................................................................... 4-2 
4.2.2 Wind Direction ........................................................................................................... 4-3 
4.2.3 Wind Speed ............................................................................................................... 4-3 
4.2.4 Temperature .............................................................................................................. 4-3 
4.2.5 Relative Humidity ....................................................................................................... 4-3 
4.2.6 Barometric Pressure ................................................................................................... 4-4 
4.2.7 Precipitation .............................................................................................................. 4-4 
 CONCLUSION 5-1 
APPENDIX A. AUDIT EQUIPMENT CERTIFICATIONS A 
APPENDIX B. PERFORMANCE AUDIT FIELD DATA SHEETS – COPPERTON C3 B 
APPENDIX C. PERFORMANCE AUDIT FIELD DATA SHEETS – HI-COUNTRY C 

List of Tables
Table 2-1 Trinity Performance Audit Equipment .................................................................................... 2-1 
Table 3-1 Instrumentation at Rio Tinto Kennecott’s Copperton C3 and Hi-Country PM10 Monitoring Stations 3-
2 
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Trinity Consultants ii
Table 3-2 Performance Audit Methods and Acceptable Tolerances ......................................................... 3-4 
Table 4-1 Copperton C3 PM10 Hi-Volume Sampler Flow Audit Results ..................................................... 4-1 
Table 4-2 Hi-Country PM10 Hi-Volume Sampler Flow Audit Results .......................................................... 4-3 
Table 5-1 Performance Audit Results of Rio Tinto Kennecott’s Copperton C3 and Hi-Country Monitoring
Stations ............................................................................................................................................. 5-1 

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INTRODUCTION
Condition II.B.4.a of Rio Tinto Kennecott’s Bingham Canyon Mine (BCM) Approval Order (AO) requires that
two ambient monitoring stations, referred to as Copperton C3 and Hi-Country, be operated to measure
particulate matter with an aerodynamic diameter of less than 10 microns (PM10) until a minimum of
234,000,000 tons per year (TPY) of material moved from the mine has been achieved. The purpose of the
monitoring is to measure PM10 concentrations in the vicinity of the mine and to maintain compliance with the
National Ambient Air Quality Standards (NAAQS) for 24-hour PM10. At each of these stations, meteorological
measurements consisting of wind speed, wind direction, temperature, relative humidity, barometric pressure,
and precipitation are collected on 10-meter towers.

On November 1, 2023, Trinity Consultants (Trinity) conducted a quality assurance performance audit of the
Copperton C3 and Hi-Country PM10 and meteorological monitoring equipment to meet Utah Division of Air
Quality (UDAQ) and US EPA quality assurance requirements. This report summarizes the performance audit
activities conducted on the filter based PM10 samplers and meteorological sensors on this day.

PM10 sampler and meteorological sensor performance audits at the Rio Tinto Kennecott monitoring sites were
conducted in accordance with the following guidelines:

► Quality Assurance Handbook for Air Pollution Measurement Systems, Vol. II: Ambient Air Quality
Monitoring Program, January 2017,
► 40 CFR Part 50, Appendix J,
► EPA’s Ambient Monitoring Guidelines for Prevention of Significant Deterioration (PSD), 1987,
► Quality Assurance Handbook for Air Pollution Measurement Systems, Vol. IV: Meteorological
Measurements, Final, March 2008, and,
► EPA’s Meteorological Monitoring Guidance for Regulatory Modeling Applications, February 2000.

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PERFORMANCE AUDIT EQUIPMENT
Presented in Table 2-1 are the Trinity audit reference standard instruments which were used to conduct quality
assurance performance audits.
Table 2-1 Trinity Performance Audit Equipment
Parameter Equipment Serial Number
PM10 Flow Tisch Environmental HiVol Orifice 0379
Wind Direction

Brunton Model 5008 Pocket Transit
RM Young Model 18212 Vane Angle Fixture
RM Young Torque Gauge Model 18331
2610408987
NA
NA
Met One Model 040 Direction Template
Waters Torque Gauge Model 366-1M
NA
4689
Wind Speed

RM Young Model 18802 Anemometer Drive
RM Young Torque Disc Model 18310
Waters Torque Gauge Model 366-3M
CA3678
NA
4690
Temperature ReoTemp TM99A 082818048
Barometric Pressure Vaisala Model PTB110 V0920825
Relative Humidity Vaisala HMP45AC F1450005
Precipitation Polylab 100 ml Burette NA
NA = Not Available.

Copies of audit equipment certifications are included in Appendix A.
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PERFORMANCE AUDIT PROCEDURES
The following sections describe the PM10 sampler and meteorological quality assurance performance
checks conducted by Trinity at Rio Tinto Kennecott’s Copperton C3 and Hi-Country monitoring stations
on November 1, 2023.
3.1 Copperton C3 and Hi-Country Monitoring Sites
PM10 measurements are collected every three days for 24 hours, midnight to midnight, in accordance
with US EPA’s three-day sampling schedule at the Copperton C3 and Hi-Country monitoring stations.
The Hi-Country monitoring station is operated in the vicinity of one of the top five highest modeled
ground level PM10 concentrations; the Copperton C3 monitoring station is located near the town of
Copperton, Utah. 10-meter meteorological towers are also installed at the Hi-Country and Copperton
stations which collect continuous measurements of wind speed, wind direction, temperature, relative
humidity, barometric pressure, and precipitation.

The latitude/longitude coordinates and elevations of the Copperton and Hi-Country air quality and
meteorological monitoring sites are as follows:

Site Latitude
(decimal degrees)
Longitude
(decimal degrees)
Elevation
(feet)
Copperton C3 40.56265° North -112.10257° West 5,480
Hi-Country 40.50335° North -112.10294° West 6,003

The PM10 and meteorological instrumentation that is installed at the monitoring sites is presented in
Table 3-1.
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Table 3-1 Instrumentation at Rio Tinto Kennecott’s Copperton C3 and Hi-Country PM10
Monitoring Stations
Parameter Equipment
Manufacturer
Model
Number
Serial Number
Copperton
PM10 Wedding & Associates High Volume Model 600 A
PM10 Wedding & Associates High Volume Model 600 B
PM10 Wedding & Associates High Volume Model 600 C
PM10 Wedding & Associates High Volume Model 600 D
PM10 Wedding & Associates High Volume Model 600 E
Wind Speed RM Young 05305-AQ 146853
Wind Direction RM Young 05305-AQ 146853
Temperature E+E Elektronic EE 181 164016000096C7
Relative Humidity E+E Elektronic EE 181 164016000096C7
Barometric Pressure Setra 278 7538091
Precipitation Texas Electronics TR525 92237-0822
Hi-Country
PM10 Tisch Environmental Model TE-6070V A
PM10 Tisch Environmental Model TE-6070V B
PM10 Tisch Environmental Model TE-6070V C
PM10 Tisch Environmental Model TE-6070V D
PM10 Tisch Environmental Model TE-6070V E
PM10 Tisch Environmental Model TE-6070V F
PM10 Tisch Environmental Model TE-6070V G
PM10 Tisch Environmental Model TE-6070V H
Wind Speed Met One 010C NA
Wind Direction Met One 020C NA
Temperature E+E Elektronic EE 181-L 192916000065B5
Relative humidity E+E Elektronic EE 181-L 192916000065B5
Barometric Pressure Vaisala PTB101B Z3120033
Precipitation Texas Electronics TR525 92238-0822
3.2 Performance Audit Methods

This section describes the audit methods used to verify the performance of the PM10 and meteorological
monitoring equipment installed at the Copperton C3 and Hi-Country monitoring stations.
3.2.1 PM10
The sampler is audited using an orifice transfer standard that is traceable to a primary standard. The orifice
transfer standard is referenced to 25°C and 760 mmHg. The audit device, whether it be one that uses multi-
hole adapter plates or an adjustable flow restrictor, is connected to a differential pressure gauge or tube
manometer. Flow rates are calculated using the certification equation for the transfer standard.
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3.2.2 Wind Direction
The orientation of the wind direction sensor at the tower was checked using a professional magnetic compass.
The compass was set using a magnetic declination of 11.0 degrees east of north. In addition, the wind
direction sensor linearity was verified by checking the sensor output at 30-degree increments throughout the
entire 0 to 360-degree range in both clockwise and counterclockwise directions. The sensor starting threshold
was determined by measuring shaft rotational torque using a torque gauge.
3.2.3 Horizontal Wind Speed
The calibration of the wind speed sensor at the tower was verified by applying known revolutions per minute
using a variable speed motor drive. The shaft of the synchronous motor was attached to the bearing shaft of
the anemometer with the prop removed. Synchronous motor speeds were translated into calculated wind
speeds in meters per second using manufacturer's specifications. The sensor response was compared to the
calculated wind speeds. Wind speed sensor shaft rotational torque was measured with a torque gauge to
evaluate the starting threshold.
3.2.4 Temperature
The temperature sensor calibration was verified by direct comparison of sensor outputs to a collocated
calibrated reference standard thermometer at three different temperatures over the measurement range.
3.2.5 Relative Humidity
The relative humidity sensor was audited by comparison of station sensor outputs with a relative humidity
reference sensor collocated at ambient conditions.
3.2.6 Barometric Pressure
The barometric pressure sensor output was verified by comparing the output of a certified reference
barometer with sensor outputs recorded on the data acquisition system.
3.2.7 Precipitation
Precipitation sensor output was audited using a standard burette to add water to the gauge to simulate
rainfall. The volume of water required to produce 10 tips was recorded during three runs making sure that
both sides of the tip bucket were similar. The volume was divided by the area of the gauge opening to
determine the calculated amount of simulated rainfall. This amount was compared with the amount of
precipitation recorded by the station data logger.

A summary of the audit methods and the acceptable tolerance for each method is presented in Table 3-2.
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Table 3-2 Performance Audit Methods and Acceptable Tolerances
Parameter Audit Method Acceptable Tolerances
PM10 Sampler Flow Multi-hole Adapter Plates or
Adjustable Flow Restrictor
<±7.1% of transfer
standard
<±10.1% from design
Wind Direction Orientation plus Linearity
Starting Threshold
±5°
<0.5 m/s
Horizontal Wind Speed Synchronous Motor
Starting Threshold
±.20 m/s
<0.5 m/s
Temperature Collocated Reference
Thermometer Comparison
±0.5°C

Barometric Pressure Collocated Reference Comparison ±3mb
Relative Humidity Collocated Reference Comparison ±7%RH
Precipitation Calibrated Volumetric Addition ±10%

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PERFORMANCE AUDIT RESULTS
The following sections present the November 1, 2023 performance audit results for the PM10 samplers and
the meteorological sensors located at Rio Tinto Kennecott’s Copperton C3 and Hi-Country monitoring stations.
4.1 Copperton C3 Monitoring Station
The performance audit results for the Copperton monitoring station are summarized below. Copies of the PM10
and meteorological performance audit field data sheets are included in Appendix B.
4.1.1 PM10
On November 1, 2023, the Copperton C3 site volumetric flow controlled high-volume PM10 samplers were
audited using a certified high-volume calibration orifice with a filter mounted in the sampler. The audit flowrate
percent differences using the Qa or actual flowrate method are presented in Table 4-1.
Table 4-1 Copperton C3 PM10 Hi-Volume Sampler Flow Audit Results
Sampler ID Reference
Standard
(m3/min)
Sampler
Flow
(m3/min)
% Difference
(Transfer
Standard)
% Difference
(Design)
A 1.117 1.1078 -0.8 1.3
B 1.091 0.9298 2.4 -1.5
C 1.091 1.1178 2.5 -1.6
D 1.094 0.9289 2.1 -1.4
E As found, the sampler was not in service and could not be audited

As seen from Table 4-1, with the exception of Sampler E, all samplers were within the allowable tolerance of
<±7.1% of the transfer standard and within <±10% of the design flow rate and were operating within the
allowable average 1.13 m3/minute flow range.
4.1.2 Wind Direction
The 10-meter wind direction sensor orientation checks indicated that the cross-arm alignment was 0.0 degrees
with reference to true north. The vane was positioned parallel to the crossarm in the 0- and 180-degree
positions and the data system reported 3.0 and 178.2 degrees, respectively. Sensor linearity was checked at
30-degree increments in both clockwise and counterclockwise directions and found to be within 2.6 degrees.
The wind direction sensor orientation plus linearity were 2.6 degrees which are within the acceptable tolerance
of ±5°.

Sensor shaft rotational torque was less than 10.0 gram-centimeters (gm-cm) clockwise and counterclockwise,
which translates to a starting threshold of less than (<) 0.5 meters per second (m/s). The starting threshold
was within the allowable tolerance of <0.5 m/s.
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4.1.3 Wind Speed
The 10-meter wind speed sensor responses were checked over the range of 0-41 m/s and were identical to
the audit inputs. The allowable tolerances for wind speed are ±0.20 m/s. Shaft rotational torque was <0.20
gm-cm counterclockwise translating to a starting threshold <0.5 m/s which is within the allowable tolerance
of <0.5 m/s.
4.1.4 Temperature
A reference standard digital thermometer was collocated with th e tower sensors in water baths and at ambient
conditions for intercomparison. Temperature sensor outputs were within a maximum of ±0.5°C of the
reference standard which is within the acceptable tolerance of ±0.5°C.
4.1.5 Relative Humidity
The relative humidity portion of the temperature/relative humidity sensor was checked with a reference sensor
during ambient collocation and showed a maximum percent difference from the reference of 3.5 percent (%).
This is within the allowable tolerance of ±7% relative humidity.
4.1.6 Barometric Pressure
A certified reference barometer was collocated with the site barometric pressure sensor. Sensor output was
within a maximum of 0.3 millibars of the reference which is within the acceptable tolerance of ±3.0 millibars.
4.1.7 Precipitation
Three runs of 10 tips indicated that the rain gauge required an average of 0.9 percent less water to produce
30 tips on the data acquisition system than the calculated calibration. This is within the allowable ±10 percent
tolerance.
4.2 Hi-Country Monitoring Station
The performance audit results for the Hi-Country monitoring station are summarized below. Copies of the
PM10 and meteorological performance audit field data sheets are included in Appendix C.
4.2.1 PM10
On November 1, 2023, the Hi-Country site volumetric flow controlled high-volume PM10 samplers were audited
using a certified high-volume calibration orifice with a filter mounted in the sampler. The audit flowrate percent
differences using the Qa or actual flowrate method are presented in Table 4-2.
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Table 4-2 Hi-Country PM10 Hi-Volume Sampler Flow Audit Results
Sampler
ID
Reference
Standard
(m3/min)
Sampler
Flow
(m3/min)
% Difference
(Transfer
Standard)
% Difference
(Design)
A 1.089 1.113 2.2 -2.6
B 1.089 1.103 1.3 -2.4
C 1.089 1.107 1.6 -2.4
D 1.089 1.110 1.9 -2.4
E 1.115 1.115 0.0 0.0
F 1.089 1.098 0.8 -2.4
G 1.089 1.112 2.1 -2.5
H 1.089 1.108 1.7 -2.5

As seen from Table 4-2, all samplers were within the allowable tolerance of <±7.1% of the transfer standard
and within <±10% of the design flow rate and were operating within the allowable average 1.13 m3/min flow
range.
4.2.2 Wind Direction
The 10-meter wind direction sensor orientation checks indicated that the cross-arm alignment was 359.0
degrees with reference to true north. The vane was positioned parallel to the crossarm in the 0- and 180-
degree positions and the data system reported 359.0 and 178.0 degrees, respectively. Sensor linearity was
checked at 30-degree increments in both clockwise and counterclockwise directions and found to be within
±1.8 degrees. The wind direction sensor orientation plus linearity were ±2.8 degrees which are within the
acceptable tolerance of ±5°.

Sensor shaft rotational torque was <6.0 gm-cm clockwise and counterclockwise, which translates to a starting
threshold of <0.5 m/s. The starting threshold was within the allowable tolerance of <0.5 m/s.
4.2.3 Wind Speed
The 10-meter wind speed sensor responses were checked over the range of 0-49 m/s and were identical to
the audit inputs. The allowable tolerances for wind speed are ±0.20 m/s. Shaft rotational torque was <0.20
gm-cm counterclockwise translating to a starting threshold <0.5 m/s which is within the allowable tolerance
of <0.5 m/s.
4.2.4 Temperature
A reference standard digital thermometer was collocated with th e tower sensors in water baths and at ambient
conditions for intercomparison. Temperature sensor outputs were within 0.10°C of the reference standard
which is within the acceptable tolerance of ±0.5°C.
4.2.5 Relative Humidity
The relative humidity portion of the temperature/relative humidity sensor was checked with a reference sensor
during ambient collocation and showed a maximum percent difference from the reference of 3.0%. This is
within the allowable tolerance of ±7% relative humidity.
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4.2.6 Barometric Pressure
A certified reference barometer was collocated with the site barometric pressure sensor. Sensor output was
within a maximum of -0.1 millibars of the reference which is within the acceptable tolerance of ±3.0 millibars.
4.2.7 Precipitation
Three runs of 10 tips indicated that the rain gauge required an average of 0.5 percent less water to produce
30 tips on the data acquisition system than the calculated calibration. This is within the allowable ±10 percent
tolerance.

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CONCLUSION
On November 1, 2023, a performance audit was conducted by Trini ty on the PM10 samplers and meteorological
sensors at Rio Tinto Kennecott’s Copperton C3 and Hi-Country monitoring station. Table 5-1 presents the
results of this audit.
Table 5-1 Performance Audit Results of Rio Tinto Kennecott’s Copperton C3 and Hi-Country
Monitoring Stations
Parameter Equipment
Manufacturer
Model
Number
Serial Number Audit
Results
Copperton
PM10 Wedding & Associates High Volume Model 600 A Pass
PM10 Wedding & Associates High Volume Model 600 B Pass
PM10 Wedding & Associates High Volume Model 600 C Pass
PM10 Wedding & Associates High Volume Model 600 D Pass
PM10 Wedding & Associates High Volume Model 600 E NA1
Wind Speed RM Young 05305-AQ 146853 Pass
Wind Direction RM Young 05305-AQ 146853 Pass
Temperature E+E Elektronic EE 181-L 164016000096C7 Pass
Relative Humidity E+E Elektronic EE 181-L 164016000096C7 Pass
Barometric Pressure Setra 278 7538091 Pass
Precipitation Texas Electronics TR-525 92237-0822 Pass
Hi-Country
PM10 Tisch Environmental Model TE-6070V A Pass
PM10 Tisch Environmental Model TE-6070V B Pass
PM10 Tisch Environmental Model TE-6070V C Pass
PM10 Tisch Environmental Model TE-6070V D Pass
PM10 Tisch Environmental Model TE-6070V E Pass
PM10 Tisch Environmental Model TE-6070V F Pass
PM10 Tisch Environmental Model TE-6070V G Pass
PM10 Tisch Environmental Model TE-6070V H Pass
Wind Speed Met One 010C NA Pass
Wind Direction Met One 020C NA Pass
Temperature E+E Elektronic EE 181-L 192916000065B5 Pass
Relative humidity E+E Elektronic EE 181-L 192916000065B5 Pass
Barometric Pressure Vaisala PTB101B Z3120033 Pass
Precipitation Texas Electronics TR-525 92238-0822 Pass
1 Sampler E at C3 was not in service at the time of the audit and could not be audited.

As can be seen from Table 5-1, except for Sampler E at C3, all remaining PM10 samplers and meteorological
sensors passed the audit and appeared to be operating within USEPA and UDAQ requirements for PM10 and
meteorological measurements at PSD monitoring stations.
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APPENDIX A. AUDIT EQUIPMENT CERTIFICATIONS

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Brunton s/n 
Model
Date
Location
Declination
Technician(s):
Time
Calculated
 Azimuth
Measured
 Azimuth
Difference
(Degrees)
12:10 171.5 171.0 0.5
12:27 176.4 176.0 0.4
12:37 179.0 179.0 0.0
AVG 0.3
PASS/FAIL PASS Criteria = +/‐ 1.0 degree
Calculated azimuth angle derived from https://www.suncalc.org
Comments:
Audit (Spare)
MSI Upper Parking Lot
10.92
Ryan Evans / Tomy St‐Laurent
BRUNTON 
CALIBRATION SHEET
2610408987
5006 Metal
1/30/2023
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Temperature Sensor
Calibration Record
Sensor Type:Reo Temp
Sensor ID:082818048
Sensor Range:-40.0 to +150.0 C
CALIBRATION:
8/11/2023
8/11/2024
Time:11:30
Location:MSI Lab
Reference Device Cole Parmer
Reference Device ID:122171278
Technician:Ryan Evans
Calibration
Temperature Point
Calibration Reference
Temperature
Observed Sensor
Temperature Difference in Degrees
( C ) ( C ) ( C ) .
Tr Ts
Calibrated on
Next calibration due
0.10
0.19
20.30
0.20
39.30 0.09
20.20
degrees C.
39.21
0.01
1
2
3 Water bath
Water bath
Procedure:
Water baths / blocks used for
medium. Each point stirred 3-5
minutes until stabilized
Values should be within +/- 0.5
Water bath
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

RELATIVE HUMIDITY SENSOR
CALIBRATION RECORD
Sensor Manufacturer:VAISALA HMP45AC
Sensor ID:F1450005
Sensor Range:0 - 100%
02/14/23
02/14/24
Time:8:20
Location:MSI lab
Reference Device:Vaisala HMK 15 Salt Chambers
Reference Device ID:(LiCL) (MgCL2) (NaCL)
Cole Parmer Thermometer S/N 122171278
Technician:TSTL
Comments Lab temperature = 23.50 22.6
Adjustment No adjustment
Reference Reference
Salt Solution Relative Humidity Observed
From To NaCL / LiCL %Sensor Output Difference
2/14/2023 8:20 9:05 NaCL 75.4% 75.7% 0.2%
2/14/2023 9:10 10:05 MgCL 33.0% 31.5% -1.4%
2/15/2023 16:40 17:00 LiCL 11.3% 11.1% -0.2%
Temperature Reference Sensor
Check Temperature Response Difference
2/15/2023 14:40 15:00 Water Bath -0.04 0.22 0.26
2/15/2023 15:00 15:30 Water Bath 41.54 41.89 0.35
2/15/2023 15:30 15:50 Water Bath 23.52 23.66 0.14
Procedure:
Remove sensor cap and insert probe into salt chamber.
After 30 min record value.
Record lab temperature and comparison with HMP sensor using reference thermometer.
Calibration Criteria +/- 3.5% RH
Temperature comparison in ambient and water bath medium with reference until stable.
Calibrated on
Next calibration due
Time
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

Rio Tinto Kennecott Copperton and Hi-Country Stations / PM10 and Meteorological November 2023 Performance Audit
Trinity Consultants B
APPENDIX B. PERFORMANCE AUDIT FIELD DATA SHEETS –
COPPERTON C3

DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/1/2023 Time 13:30
Sampler Model S/N A Operator RTK
Pa(mm Hg)627.6 Ta (°C)16.0 Ta (°K)289.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.10 in. of H20Qa(orifice)a 1.117 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)24.50 in H20 20.1 in H20
Stagnation Pressure (ΔPstg)45.757 mm Hg 37.540 mm Hg
Absolute Stagnation Pressure (P1)b 581.8426 mm Hg 590.0603 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.927 (see note) 0.940 (see note)
Qa (sampler) c (Use Lookup table)1.1078 m3/min 1.1353 m3/min
QC - Check Percentage Difference d -0.8 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1447 m3/min
Design flow rate percentage difference f 1.3 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 AUDIT SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/1/2023 Time 13:36
Sampler Model S/N B Operator RTK
Pa(mm Hg)627.6 Ta (°C)16.0 Ta (°K)289.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.091 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.6 in H20 20.1 in H20
Stagnation Pressure (ΔPstg)44.076 mm Hg 37.540 mm Hg
Absolute Stagnation Pressure (P1)b 583.5235 mm Hg 590.0603 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.930 (see note) 0.940 (see note)
Qa (sampler) c lookup table 1.1176
m3/min 1.1405 m3/min
QC - Check Percentage Difference d 2.4 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1127 m3/min
Design flow rate percentage difference f -1.5 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:= cell contains equation
VFC HIVOL PM10 AUDIT SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/1/2023 Time 13:42
Sampler Model S/N C Operator RTK
Pa(mm Hg)627.6 Ta (°C)16.0 Ta (°K)289.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.091 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.10 in H20 19.9 in H20
Stagnation Pressure (ΔPstg)43.143 mm Hg 37.166 mm Hg
Absolute Stagnation Pressure (P1)b 584.4574 mm Hg 590.4338 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.931 (see note) 0.941 (see note)
Qa (sampler) c lookup table 1.1178
m3/min 1.1403 m3/min
QC - Check Percentage Difference d 2.5 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1123 m3/min
Design flow rate percentage difference f -1.6 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 AUDIT SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/1/2023 Time 13:47
Sampler Model S/N D Operator RTK
Pa(mm Hg)627.6 Ta (°C)16.0 Ta (°K)289.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.01 in. of H20Qa(orifice)a 1.094 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.9 in H20 20.5 in H20
Stagnation Pressure (ΔPstg)44.637 mm Hg 38.287 mm Hg
Absolute Stagnation Pressure (P1)b 582.9632 mm Hg 589.3132 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.939 (see note)
Qa (sampler) c (lookup table)1.1168 m3/min 1.1385 m3/min
QC - Check Percentage Difference d 2.1 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1144 m3/min
Design flow rate percentage difference f -1.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:Note:
VFC HIVOL PM10 AUDIT SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
C3
Station Location Date 11/1/2023 Time
Sampler Model S/N E Operator RTK
Pa(mm Hg) Ta (°C) Ta (°K)
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O) in. of H20Qa(orifice)a #VALUE!m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)in H20in H20
Stagnation Pressure (ΔPstg)mm Hg mm Hg
Absolute Stagnation Pressure (P1)b mm Hg mm Hg
Stagnation Pressure Ratio (P1/Pa)(see note) (see note)
Qa (sampler) c m3/min m
3/min
QC - Check Percentage Difference d %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e m3/min
Design flow rate percentage difference f %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 AUDIT SHEET
RTK C3
Wedding & Assoc.
1/5/2023
Adam Lenkowski
PASS
NOTE: SAMPLER NOT IN SERVICE.
UNABLE TO AUDIT
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 12:30
PROJECT Stop Time 14:13
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:1.5 meters
Sensor s/n:
Sensor Range:mb
AUDIT EQUIPMENT
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
Time
COMMENTS
= cell containing equationsAudited By:
C3
23-19
Trinity
278
7538091
PTB 110
V0920825
13:34
SENSOR RESPONSE
12:40
12:57
Average
Audit Criteria: +/- 3mb
Audit INPUT DIFFERENCE
(mb)(mb) (mb)
0.3
0.1
-0.2
837.0
836.9
836.8
BAROMETRIC PRESSURE
Adam Lenkowski
600-1100
8/7/2023
05/19/2023Setra
Vaisala
0.1
837.3
837.0
836.6
836.2
836.4
836.6
836.8
837.0
837.2
837.4 INPUT RESPONSE
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 12:30
PROJECT Stop Time 14:13
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:10 meters
Sensor s/n:
Sensor Range:%
AUDIT EQUIPMENT
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
Time
COMMENTS
= cell containing equations
RELATIVE HUMIDITY
C3
23-19
Trinity
EE181
164016000096C7
HMP 45AC
05/19/2023E+E Elektronik
F1450005
Audit INPUT SENSOR RESPONSE DIFFERENCE
(%) (%) (%)
12:37 18.0 21.5 3.5
12:57 18.0 21.0 3.0
17.0 20.0 3.0
Audit Criteria: +/- 7% RH
Colocated in aspirated chamber.
Adam LenkowskiAudited By:
0-100
2/14/2023Vaisala
Average 3.2
13:50
0.0
5.0
10.0
15.0
20.0
25.0 INPUT RESPONSE
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 12:30
PROJECT Stop Time 14:13
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model:
Sensor Range:°C Sensor Height Serial Number
10 meters 164016000096C7
AUDIT EQUIPMENT
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
10 METER
RESPONSE DIFF
Time (°C)(°C)(°C)
Audit Criteria: +/- 0.5 deg C
COMMENTS
= cell containing equations
12:44
Audit INPUT
Adam LenkowskiAudited By:
AVERAGE
13:25
Water baths and/or ambient conditions
13:16
EE Elektronic 05/19/2023
TEMPERATURE
C3
23-19
Trinity
EE181
-50 to 50 degrees
REOtemp 2/3/2023
TM99A
0.00
082818048
-0.3
0.5
17.317.6
33.1 33.6
0.0 -0.2 -0.2
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 12:30
PROJECT Stop Time 14:13
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:10 meters
Sensor s/n: Declination:
Sensor Range:°Alignment:
Vane to Crossarm: Difference:
Rotational Torque:
AUDIT EQUIPMENT Starting Threshold:
Audit Device: Certification Date:
Audit Device Model: Compass:
Audit Device s/n:Torque Device:
INPUT
RESPONSE DIFF TOTAL DIFF RESPONSE DIFF TOTAL DIFF
(°)(°)(°)(°)(°)(°)(°)
North 0/360 2.5 2.5 2.5 2.6 2.6 2.6
30 32.5 2.5 2.5 31.8 1.8 1.8
60 62.5 2.5 2.5 62.0 2.0 2.0
East 90 91.9 1.9 1.9 91.5 1.5 1.5
120 121.1 1.1 1.1 121.1 1.1 1.1
150 148.2 -1.8 -1.8 148.0 -2.0 -2.0
South 180 179.1 -0.9 -0.9 180.0 0.0 0.0
210 208.9 -1.1 -1.1 208.5 -1.5 -1.5
240 240.4 0.4 0.4 240.1 0.1 0.1
West 270 270.8 0.8 0.8 269.5 -0.5 -0.5
300 300.2 0.2 0.2 299.9 -0.1 -0.1
330 332.0 2.0 2.0 331.8 1.8 1.8
COMMENTS
= cell containing equationsAudited By:
C3
23-19
Trinity
11.5
0.0
Audit Criteria: Alignment with true North plus Linearity: +/- 5 degrees
Starting Threshold: <=0.5m/s
TOTAL DIFF is the total difference when including Orientation and Linearity
<0.5 m/s
0.0
3.0/178.2 || 2.9/178.9
Brunton 2610408987
RM Young 18331
TOTAL DIFF is the total difference when including
Orientation and Linearity
WIND DIRECTION 10M
Adam Lenkowski
18212
Vane Angle Fixture
05305-AQ
146853
0-360
1/30/2023
05/19/2023RM Young
CLOCKWISE COUNTER-CLOCKWISE
Wind direction bearings at tolerance
RM Young
<= 10 gm-cm
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 12:30
PROJECT Stop Time 14:13
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:10 meters
Sensor s/n:
Sensor Range:m/s
Rotational Torque:
AUDIT EQUIPMENT Starting Threshold:
Audit Device: Certification Date:
Audit Device Model:Torque Device:
Audit Device s/n:
RPM
COMMENTS
= cell containing equations
18802
0.000
WIND SPEED 10M
7/12/2023
05/19/2023RM Young
0.0000
300
C3
23-19
Trinity
Audit INPUT
600
0.000
0.2 gm-cm
<0.5 mps
1.536
3.072
9.216
0.000
Prop disc #18310
SENSOR RESPONSE DIFFERENCE
(m/s)
0.000
CA03678
05305-AQ
146853
0-60
RM Young
(m/s)
0.000
Adam Lenkowski
20.48020.480
Audit Criteria: +/- 0.20 m/s
0.000
Audited By:
2500 12.800
1800
1.536
3.072
4000
(m/s)
8000 40.960 40.960 0.000
6000 30.720 30.720 0.000
12.800
0.000
9.216
900 4.608 4.608 0.000
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit
SITE NAME Date 11/01/2023 Start Time 12:30
PROJECT Stop Time 14:13
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:36 inches
Sensor s/n: Recording Resolution
Sensor Range:inches
Funnel Diameter:20.3 cm
AUDIT EQUIPMENT Funnel Area (A):324.3 cm2
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
(ml.)
1 cc = 1 ml COMMENTS
Funnel (r)adius = funnel (D)iameter ÷ 2
(A)rea of funnel = π*r2
INPUT = Input (ml) ÷ A ÷ cm to inches
= cell containing equations
Audit Criteria: +/- 10% of input
24hr start= 0.0 end= 0.30
Adam LenkowskiCalibrated By:
Average 0.0991 0.10 0.9%
82.0 0.100 0.10 0.5%
81.0 0.098 0.10 1.7%
82.0 0.100 0.10 0.5%
(inches) (inches) (%)
TR-525 Heated
92237-0822 1 tip = 0.01"
Unlimited
Polylab NA
100 mL burette
NA
Audit INPUT SENSOR RESPONSE DIFFERENCE
Texas Electronics N/A
PRECIPITATION
C3
23-19
Trinity
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F

Rio Tinto Kennecott Copperton and Hi-Country Stations / PM10 and Meteorological November 2023 Performance Audit
Trinity Consultants C
APPENDIX C. PERFORMANCE AUDIT FIELD DATA SHEETS – HI-
COUNTRY
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:00
Sampler Model S/N A Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:Windy
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.9103 b =-0.0335 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.5 in H2020in H20
Stagnation Pressure (ΔPstg)43.890 mm Hg 37.353 mm Hg
Absolute Stagnation Pressure (P1)b 572.8103 mm Hg 579.3471 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.939 (see note)
Qa (sampler) c lookup table 1.113
m3/min 1.125 m3/min
QC - Check Percentage Difference d 2.2 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1004 m3/min
Design flow rate percentage difference f -2.6 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:Note:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:04
Sampler Model S/N B Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:Sunny, calm
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99980
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.3 in H20 19.8 in H20
Stagnation Pressure (ΔPstg)43.516 mm Hg 36.979 mm Hg
Absolute Stagnation Pressure (P1)b 573.1838 mm Hg 579.7206 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.940 (see note)
Qa (sampler) c lookup table 1.103
m3/min 1.117 m3/min
QC - Check Percentage Difference d 1.3 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1028 m3/min
Design flow rate percentage difference f -2.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:09
Sampler Model S/N C Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.0335 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.3 in H20 19.9 in H20
Stagnation Pressure (ΔPstg)43.516 mm Hg 37.166 mm Hg
Absolute Stagnation Pressure (P1)b 573.1838 mm Hg 579.5338 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.940 (see note)
Qa (sampler) c lookup table 1.107
m3/min 1.121 m3/min
QC - Check Percentage Difference d 1.6 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1027 m3/min
Design flow rate percentage difference f -2.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:12
Sampler Model S/N D Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.4 in H20 19.8 in H20
Stagnation Pressure (ΔPstg)43.703 mm Hg 36.979 mm Hg
Absolute Stagnation Pressure (P1)b 572.9971 mm Hg 579.7206 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.940 (see note)
Qa (sampler) c lookup table 1.110 m3/min 1.124 m3/min
QC - Check Percentage Difference d 1.9 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1025 m3/min
Design flow rate percentage difference f -2.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:14
Sampler Model S/N E Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.10 in. of H20Qa(orifice)a 1.115 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.3 in H20 19.6 in H20
Stagnation Pressure (ΔPstg)43.516 mm Hg 36.606 mm Hg
Absolute Stagnation Pressure (P1)b 573.1838 mm Hg 580.0941 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.941 (see note)
Qa (sampler) c lookup table ->1.115 m3/min 1.130 m3/min
QC - Check Percentage Difference d 0.0 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1302 m3/min
Design flow rate percentage difference f 0.0 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:18
Sampler Model S/N F Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:Sunny
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.2 in H20 19.6 in H20
Stagnation Pressure (ΔPstg)43.329 mm Hg 36.606 mm Hg
Absolute Stagnation Pressure (P1)b 573.3706 mm Hg 580.0941 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.930 (see note) 0.941 (see note)
Qa (sampler) c lookup table 1.098 m3/min 1.112 m3/min
QC - Check Percentage Difference d 0.8 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1030 m3/min
Design flow rate percentage difference f -2.4 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:21
Sampler Model S/N G Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.7 in H20 20.1 in H20
Stagnation Pressure (ΔPstg)44.263 mm Hg 37.540 mm Hg
Absolute Stagnation Pressure (P1)b 572.4368 mm Hg 579.1603 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.928 (see note) 0.939 (see note)
Qa (sampler) c lookup table 1.112
m3/min 1.125 m3/min
QC - Check Percentage Difference d 2.1 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1014 m3/min
Design flow rate percentage difference f -2.5 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
Note: Motor not functioning as found. Replaced
by site technician, and then audited.
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Hi Country
Station Location Date 11/1/2023 Time 12:28
Sampler Model S/N H Operator RTK
Pa(mm Hg)616.7 Ta (°C)10.0 Ta (°K)283.0
Wx Cond:
Leak Check: PASS/FAIL?
Orifice S/N 0379 Calibration Date
Orifice cal relationship: m=0.91032 b =-0.03349 r =0.99998
Orifice Press. Drop (ΔH2O)2.00 in. of H20Qa(orifice)a 1.089 m3/min
ORIFICE INSTALLED ORIFICE NOT INSTALLED
Stagnation Pressure (ΔPstg)23.6 in H20 20.0 in H20
Stagnation Pressure (ΔPstg)44.076 mm Hg 37.353 mm Hg
Absolute Stagnation Pressure (P1)b 572.6235 mm Hg 579.3471 mm Hg
Stagnation Pressure Ratio (P1/Pa)0.929 (see note) 0.939 (see note)
Qa (sampler) c lookup table 1.108
m3/min 1.121 m3/min
QC - Check Percentage Difference d 1.7 %(≤7.1% of Xfer Std.)
Qa (corrected sampler) e 1.1016 m3/min
Design flow rate percentage difference f -2.5 %(≤10.1 of Design)
(a) Qa(Orifice) = {[(Delta-H20)(Ta/Pa)]1/2 - b} {1/m}
(b) P1 = Pa - ΔPstg
(c) Determine Qa sampler from manufacturer's lookup table (or from alternative calibration relationship)
(d) QC % Difference = ((Qa(sampler - Qa(orifice))/Qa(orifice))*100 where Qa (sampler) is measured
with the orifice installed
(e) Qa(Corrected sampler) = Qa(sampler)*((100- QC % difference)/100) where Qa (sampler) is measured
without the orifice installed.
(f) Design flow rate % difference = ((Qa(corrected sampler)-1.13)/1.13)*100
AUDITOR:
VFC HIVOL PM10 FLOW AUDIT SHEET
RTK Hi Country
Tisch
1/5/2023
Adam Lenkowski
PASS
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 9:30
PROJECT Stop Time 10:58
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:1.5 meters
Sensor s/n:
Sensor Range:mb
AUDIT EQUIPMENT
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
Time
COMMENTS
= cell containing equations
BAROMETRIC PRESSURE
Adam Lenkowski
600-1060
8/7/2023
5/19/2023Vaisala
Vaisala
-0.1
822.6
822.5
822.3
Average
Audit Criteria: +/- 3mb
Audit INPUT DIFFERENCE
(mb)(mb) (mb)
-0.1
-0.1
-0.1
822.7
822.6
822.4
Audited By:
Hi Country
23-19
Trinity
PTB101B
Z3120033
PTB 110
V0920825
10:55
SENSOR RESPONSE
09:45
10:05
822.0
822.2
822.4
822.6
822.8 INPUT RESPONSE
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 09:30
PROJECT Stop Time 10:58
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:10 meters
Sensor s/n:
Sensor Range:%
AUDIT EQUIPMENT
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
Time
COMMENTS
= cell containing equations
Audit Criteria: +/- 7% RH
Adam LenkowskiAudited By:
0-100
2/14/2023Vaisala
Average 2.3
10:55 27.0 28.0 1.0
09:45 28.0 31.0 3.0
10:05 27.0 30.0 3.0
F1450005
Audit INPUT SENSOR RESPONSE DIFFERENCE
(%) (%) (%)
EE181
192916000065B5
HMP 45AC
5/19/2023E+E Elektronik
RELATIVE HUMIDITY
Hi Country
23-19
Trinity
24.0
26.0
28.0
30.0
32.0 INPUT RESPONSE
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 09:30
PROJECT Stop Time 10:58
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model:
Sensor Range:°C Sensor Ht Serial Number
10 192916000065B5
AUDIT EQUIPMENT
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
10 METER
RESPONSE DIFF
Time (°C) (°C) (°C)
Audit Criteria: +/- 0.5 deg C
COMMENTS
= cell containing equations
082818048
0.0
0.1
0.10.1
38.8 38.9
0.021.2
10:15
Audit INPUT
10:32
EE181
-50 to 50 degrees
REOtemp 8/11/2022
TM99A
EE Elektronic 5/19/2023
TEMPERATURE
Hi Country
23-19
Trinity
Audited By:
AVERAGE
10:45
0.0
21.2
Adam Lenkowski
Water baths and/or ambient conditions.
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 09:30
PROJECT Stop Time 10:58
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:10 meters
Sensor s/n: Declination:
Sensor Range:°Alignment:
Vane to Crossarm: Difference:
Rotational Torque:
AUDIT EQUIPMENT Starting Threshold:
Audit Device: Certification Date:
Audit Device Model: Compass:
Audit Device s/n:Torque Device:
INPUT
RESPONSE DIFF TOTAL DIFF RESPONSE DIFF TOTAL DIFF
(°) (°) (°) (°) (°) (°) (°)
North 0/360 0.3 0.3 -0.7 0.3 0.3 -0.7
30 28.4 -1.6 -2.6 28.2 -1.8 -2.8
60 58.5 -1.5 -2.5 58.5 -1.5 -2.5
East 90 88.6 -1.4 -2.4 88.6 -1.4 -2.4
120 118.5 -1.5 -2.5 118.8 -1.2 -2.2
150 148.4 -1.6 -2.6 148.4 -1.6 -2.6
South 180 178.6 -1.4 -2.4 178.5 -1.5 -2.5
210 209.0 -1.0 -2.0 209.1 -0.9 -1.9
240 238.3 -1.7 -2.7 239.1 -0.9 -1.9
West 270 270.1 0.1 -0.9 270.1 0.1 -0.9
300 301.0 1.0 0.0 300.8 0.8 -0.2
330 331.4 1.4 0.4 331.4 1.4 0.4
COMMENTS
= cell containing equations
WIND DIRECTION 10M
Adam Lenkowski
040
Direction Template
020C
n/a
0-360
1/30/2023
5/19/2023Met One
CLOCKWISE COUNTER-CLOCKWISE
Replace Tail Next Vist
Met One
<6 gm-cm
Audited By:
Hi Country
23-19
Trinity
11.0
-1.0
Audit Criteria: Alignment with true North plus Linearity: +/- 5 degrees
Starting Threshold: <=0.5m/s
TOTAL DIFF is the total difference when including Orientation and Linearity
<0.5 m/s
359.0
359/178 || 0.3/180
Brunton 2610505086
Torque Watch 366-1M 4689
TOTAL DIFF is the total difference when including
Orientation and Linearity
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit SHEET
SITE NAME Date 11/01/2023 Start Time 09:30
PROJECT Stop Time 10:58
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:10 meters
Sensor s/n:
Sensor Range:m/s
Rotational Torque:
AUDIT EQUIPMENT Starting Threshold:
Audit Device: Certification Date:
Audit Device Model:Torque Device:
Audit Device s/n:
RPM
COMMENTS
= cell containing equations
32.25
0.00
24.26
600 16.26 16.26 0.00
1800 48.24 48.24 0.00
(m/s)
0.00
Adam Lenkowski
40.2540.25
Audit Criteria: +/- 0.20 m/s
0.00
Audited By:
1200 32.25
900
5.60
8.27
1500
(m/s)
CA3678
010C
n/a
0 - 50
RM Young
< 0.2 gm-cm
<0.5 mps
5.60
8.27
24.26
0.00
Torque Watch 366-3M 4690
SENSOR RESPONSE DIFFERENCE
(m/s)
0.00
18802
0.00
WIND SPEED 10M
7/11/2023
5/19/2023Met One
0.000
200
Hi Country
23-19
Trinity
Audit INPUT
300
0.00
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F
Audit
SITE NAME Date 11/01/2023 Start Time 09:30
PROJECT Stop Time 10:58
SITE OPERATOR
Sensor Mfg: Last Audit Date:
Sensor Model: Sensor Height:36 inches
Sensor s/n: Recording Resolution
Sensor Range:inches
Funnel Diameter:20.3 cm
AUDIT EQUIPMENT Funnel Area (A):324.3 cm2
Audit Device: Certification Date:
Audit Device Model:
Audit Device s/n:
(ml.)
1 cc = 1 ml COMMENTS
Funnel (r)adius = funnel (D)iameter ÷ 2
(A)rea of funnel = π*r2
INPUT = Input (ml) ÷ A ÷ cm to inches
= cell containing equations
Audit Criteria: +/- 10% of input
24hr start= 0.0 end= 0.30
Screen Removed for Winter
Adam LenkowskiCalibrated By:
Average 0.0996 0.10 0.5%
81.0 0.098 0.10 1.7%
84.0 0.102 0.10 -1.9%
81.0 0.098 0.10 1.7%
(inches) (inches) (%)
TR-525 Heated
92238-0822 1 tip = 0.01"
Unlimited
Polylab NA
100 mL burette
NA
Audit INPUT SENSOR RESPONSE DIFFERENCE
Texas Electronics N/A
PRECIPITATION
Hi Country
23-19
Trinity
DocuSign Envelope ID: A1680BB9-5BEE-400C-9E87-D4A0BF937A4F