DERR-2025-001572

David Bird <[e-mail]>
Extell Mayflower Waste Rock Pile Water Monitoring Package
Van King <[e-mail]>Wed, Feb 26, 2025 at 6:10 PM
To: David Bird <[e-mail]>, "[e-mail]" <[e-mail]>
Cc: Allison Stanley <[e-mail]>, "Fawcett, Kent" <[e-mail]>, "[e-mail]"
<[e-mail]>
Dave and Bill,
Please find attached the latest sampling results for the McHenry Campground. Also included are the latest
water level measurements. Let us know if you have questions about these analytical results.

Have a good evening,
[Quoted text hidden]
[Quoted text hidden]
Extell Water Monitoring Package Through 2_25_25.pdf
2701K
3/3/25, 10:53 AM State of Utah Mail - Extell Mayflower Waste Rock Pile Water Monitoring Package
https://mail.google.com/mail/u/0/?ik=9ad96c2360&view=pt&search=all&permmsgid=msg-f:1825170940572727511&simpl=msg-f:1825170940572727511 1/1
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Figure 1
Sampling Locations
BLX Mayflower Water Management
Wasatch County, Utah¯
Legend@?Active Monitoring Wells
@?2023 Active Monitoring Wells
2024 Damaged or Abandoned Monitoring Well
!.McHenry Campground (4997675) Big Dutch Pete Hollow Sampling Location
!.Cunningham Tunnel Sampling Location
!.US40 Culvert Outlet
!.Abandoned Piezometers and Borings
Property Line Sump
••• - -
KING WATER RESOURCES - -H Y DRDGE □L □GY AND WATER RIGHTS
Extell WL Monitoring through 2_25_25.xlsx, 2/25/2025, Prepared by Van F King, PG
6340
6345
6350
6355
6360
6365
6370
6375
6380
6385
6390
6395
6400
6405
6410
6415
6420
6425
6430
6435
6440
6445
6450
6455
6460
6465
6470
6475
6480
6485
6490
6495
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Figure 2
Water Level Trend in Monitoring Wells
Extell Mayflower, Wasatch County, Utah
GW1 GW2 GW4 GW6 GW7b GW7c GW8
GW9 GW9a GW10 GW11 GW12 GW13
Note: Monitoring Wells GW1, GW3,GW5, GW7,
GW7b, GW7c, GW9, and GW14 were decommissioned
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Figure 3
Selected Well Water Level Trends
Extell Mayflower, Wasatch County, Utah
6390
6392
6394
6396
6398
6400
6402
6404
6406
6408
6410
6412
6414
6416
6418
6420
6422
6424
6426
6428
6430
5/9/2020 9/9/2020 1/10/2021 5/13/2021 9/13/2021 1/14/2022 5/17/2022 9/17/2022 1/18/2023 5/21/2023 9/21/2023 1/22/2024 5/24/2024 9/24/2024 1/25/2025 5/28/2025 9/28/2025
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Monitoring Well GW6
6360
6362
6364
6366
6368
6370
6372
6374
6376
6378
6380
6382
6384
6386
6388
6390
6392
6394
6396
6398
6400
5/9/2020 9/9/2020 1/10/2021 5/13/2021 9/13/2021 1/14/2022 5/17/2022 9/17/2022 1/18/2023 5/21/2023 9/21/2023 1/22/2024 5/24/2024 9/24/2024 1/25/2025 5/28/2025 9/28/2025
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Monitoring Well GW8
Waste Rock / Native Soil Interface
Waste Rock / Native Soil Interface
6354
6356
6358
6360
6362
6364
6366
6368
6370
6372
6374
6376
6378
6380
6382
6384
6386
6388
6390
6392
6394
6396
5/9/2020 9/9/2020 1/10/2021 5/13/2021 9/13/2021 1/14/2022 5/17/2022 9/17/2022 1/18/2023 5/21/2023 9/21/2023 1/22/2024 5/24/2024 9/24/2024 1/25/2025 5/28/2025 9/28/2025
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Monitoring Well GW9a
GW9a Waste Rock
/ Native Soil Interface
Extell WL Monitoring through 2_25_25.xlsx, 2/25/2025, Prepared by Van F King, PG
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Table 1
Wasterock Water Management
Water Quality Monitoring
Mayflower - EX Utah, Wasatch County, Utah
Arsenic
(mg/L)
Barium
(mg/L)
Cadmium
(mg/L)
Chromium
(mg/L)
Copper
(mg/L)
Iron
(mg/L)
Lead
(mg/L)
Mercury
(mg/L)
Selenium
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
Turbidity
(NTU)
Surface Water Screening Level
(mg/L)0.010 1.0 0.00239 0.268 0.0305 1.0 0.0186 0.000012 0.0046 0.0411 0.388 None
Established
Groundwater Screening Level
(mg/L)0.010 2.0 0.005 0.1 1.3 14.0 0.015 0.002 0.05 0.10 5.0 None
Established
Sample
Date
Arsenic
(mg/L)
Barium
(mg/L)
Cadmium
(mg/L)
Chromium
(mg/L)
Copper
(mg/L)
Iron
(mg/L)
Lead
(mg/L)
Mercury
(mg/L)
Selenium
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
Turbidity
(NTU)
Surface Water Screening Level
(mg/L)0.010 1.0 0.00239 0.268 0.0305 1.0 0.0186 0.000012 0.0046 0.0411 0.388 None
Established
4/11/2020 0.00409 0.135 0.0925 <0.0400 0.122 4.91 0.0191 <0.0000900 NA <0.00200 10.7 NA
5/19/2020 <0.00200 0.0490 <0.000500 <0.00200 <0.00300 NA <0.00200 <0.0000900 <0.00200 <0.00200 0.0696 NA
12/21/2020 <0.00200 0.0557 <0.000500 <0.00200 <0.00300 0.178 <0.00200 <0.0000900 <0.00200 <0.00200 0.0412 NA
4/6/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0656 NA
4/20/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0434 NA
4/27/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0410 NA
5/4/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0329 NA
5/11/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0367 NA
5/18/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0464 NA
5/25/2021 NA NA <0.000500 NA NA NA NA NA NA NA 0.0323 NA
6/1/2021 NA NA 0.00158 NA NA NA NA NA NA NA 0.348 NA
6/8/2021 NA NA 0.000655 NA NA NA NA NA NA NA 0.181 NA
6/15/2021 NA NA 0.000732 NA NA NA NA NA NA NA 0.271 NA
7/29/2021 <0.00200 0.0572 <0.000500 <0.00200 <0.00300 2.94 <0.00200 <0.0000900 <0.00200 <0.00200 0.1280 NA
7/30/2021 <0.00200 0.0621 <0.000500 <0.00200 <0.00300 3.34 <0.00200 <0.0000900 <0.00200 <0.00200 0.1350 NA
8/3/2021 NA NA 0.000493 NA NA 4.14 NA NA NA NA 0.178 NA
12/17/2021 <0.00200 0.0431 <0.000500 <0.00200 <0.00300 0.538 <0.00200 <0.0000900 <0.00200 <0.00200 0.256 1.98
5/18/2022 0.0005 0.039 <0.0002 0.0016 0.0010 0.84 <0.0005 <0.0002 0.0010 <0.0005 0.270 9.67
Sample
Date
Arsenic
(mg/L)
Barium
(mg/L)
Cadmium
(mg/L)
Chromium
(mg/L)
Copper
(mg/L)
Iron
(mg/L)
Lead
(mg/L)
Mercury
(mg/L)
Selenium
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
Turbidity
(NTU)
Groundwater Screening Level
(mg/L)0.010 2.0 0.005 0.1 1.3 14.0 0.015 0.002 0.05 0.1 5.0 None
Established
4/11/2020 0.0117 0.325 0.152 <0.0400 0.297 18.9 0.0715 <0.0000900 NA <0.00200 17.4 NA
4/22/2020 0.00202 0.0422 0.115 <0.00200 0.544 1.34 0.109 0.000167 <0.00200 <0.00200 11.2 NA
11/10/2020 0.0043 0.146 0.0007 0.0023 0.0111 2.45 0.0115 NA 0.0010 ND 0.09 NA
11/10/2020 0.0020 0.115 0.0002 0.0009 0.0043 0.85 0.0027 ND ND ND 0.03 NA
4/6/2021 NA NA 0.00932 NA NA NA NA NA NA NA 1.25 NA
4/12/2021 <0.00200 0.0653 0.0111 <0.00200 <0.00300 0.637 <0.00200 <0.0000900 <0.00200 <0.00200 1.28 NA
4/12/2021 <0.00200 0.0644 0.0107 <0.00200 <0.00300 0.647 <0.00200 <0.0000900 <0.00200 <0.00200 1.31 NA
4/20/2021 NA NA 0.00957 NA NA NA NA NA NA NA 1.31 NA
4/27/2021 NA NA 0.00795 NA NA NA NA NA NA NA 1.19 NA
5/4/2021 NA NA 0.00636 NA NA NA NA NA NA NA 0.949 NA
5/11/2021 <0.00200 0.0611 0.00508 <0.00200 <0.003000 0.556 <0.00200 <0.0000900 <0.00200 <0.00200 0.828 NA
5/11/2021 <0.00200 0.0620 0.00496 <0.00200 <0.003000 0.638 <0.00200 <0.0000900 <0.00200 <0.00200 0.833 NA
5/18/2021 NA NA 0.00384 NA NA NA NA NA NA NA 0.664 NA
5/25/2021 NA NA 0.00330 NA NA NA NA NA NA NA 0.582 NA
6/1/2021 NA NA 0.00253 NA NA NA NA NA NA NA 0.283 NA
6/8/2021 NA NA 0.000853 NA NA NA NA NA NA NA 0.308 NA
6/15/2021 NA NA 0.000732 NA NA NA NA NA NA NA 0.271 NA
6/15/2021 NA NA 0.000521 NA NA NA NA NA NA NA 0.172 NA
6/17/2021 0.00310 0.0819 0.000652 <0.00200 0.120 6.22 0.00288 <0.0000900 <0.00200 <0.00200 0.350 NA
6/17/2021 0.00252 0.0785 0.000571 <0.00200 0.0726 5.11 0.00246 <0.0000900 <0.00200 <0.00200 0.317 NA
7/2/2021 0.00347 0.0720 0.00240 <0.00200 <0.00300 6.17 <0.00200 <0.0000900 <0.00200 <0.00200 0.175 NA
7/2/2021 0.00376 0.0726 0.00236 <0.00200 <0.00300 6.55 <0.00200 <0.0000900 <0.00200 <0.00200 0.191 NA
9/13/2021 NA NA 0.00478 NA NA 12.6 NA NA NA NA 0.488 NA
11/23/2021 *0.0407 *0.363 *0.00146 *0.0459 *0.0411 *81.8 *0.0733 *0.0000967 <0.00200 <0.00200 *0.547 High Turbidity- Not
Representative
11/23/2021 *0.0388 *0.357 *0.00147 *0.044 *0.0423 *76.5 *0.0734 *0.0000967 <0.00200 <0.00200 *0.546 High Turbidity- Not
Representative
12/8/2021 0.00305 0.0954 <0.000500 0.00251 0.00314 6.66 0.00818 <0.0000900 <0.00200 <0.00200 0.3560 NA
12/14/2021 0.00218 0.0676 <0.000500 <0.00200 <0.00300 4.1 <0.00200 <0.0000900 <0.00200 <0.00200 0.292 5.0
3/15/2022 0.0012 0.062 <0.0002 <0.0005 0.001 4.12 <0.0005 <0.0002 <0.0005 <0.0005 0.18 39.6
5/18/2022 0.0024 0.077 0.0004 0.0020 0.0035 11.1 0.0036 <0.0002 0.0008 <0.0005 1.16 14.8 - 22.6
8/11/2022 0.0009 0.053 0.0004 <0.0005 0.0016 5.73 <0.0005 <0.00015 <0.0005 <0.0005 1.46 2.19
US 40 Culvert Outlet (East Side of US 40)
Total Metals Analysis
Property Line Sump (Well Discharge)
Page 1 of 3 Wasterock Pile Water Quality Monitoring.xlsx, 2/25/2025, Prepared by Van F. King, PG
11/14/2022 0.0020 0.049 0.0003 <0.0005 0.0040 9.08 <0.0005 <0.00015 0.0014 <0.0005 1.07 4.80
6/15/2023 0.0092 0.098 0.0007 <0.0050 <0.005 11.8 <0.0005 <0.0002 <0.0005 0.001 0.324 32.23
6/12/2024 0.0011 0.210 0.0010 <0.0010 <0.0009 0.38 <0.0006 <0.0002 <0.0006 <0.0005 0.25 14.38
Sample
Date
Arsenic
(mg/L)
Barium
(mg/L)
Cadmium
(mg/L)
Chromium
(mg/L)
Copper
(mg/L)
Iron
(mg/L)
Lead
(mg/L)
Mercury
(mg/L)
Selenium
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
Turbidity
(NTU)
Surface Water Screening Level
(mg/L)0.010 1.0 0.00239 0.268 0.0305 1.0 0.0186 0.000012 0.0046 0.0411 0.388 None
Established
5/18/2022 <0.0005 0.048 <0.0002 0.0005 <0.0010 0.02 <0.0005 <0.0002 0.0005 <0.0005 <0.01 1.35
Sample
Date
Arsenic
(mg/L)
Barium
(mg/L)
Cadmium
(mg/L)
Chromium
(mg/L)
Copper
(mg/L)
Iron
(mg/L)
Lead
(mg/L)
Mercury
(mg/L)
Selenium
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
Turbidity
(NTU)
Surface Water Screening Level
(mg/L)0.010 1.0 0.00239 0.268 0.0305 1.0 0.0186 0.000012 0.0046 0.0411 0.388 None
Established
11/15/2021 NA NA <0.000500 NA NA <0.100 NA NA NA NA 0.0222 NA
12/13/2021 <0.00200 0.0301 <0.000500 <0.00200 <0.00300 <0.100 <0.00200 <0.0000900 <0.00200 <0.00200 0.0313 NA
1/14/2022 <0.00200 0.0388 <0.000500 <0.00200 0.00470 0.289 0.00399 <0.0000900 <0.00200 <0.00200 0.0840 6.52
2/22/2022 NA NA <0.000500 NA NA <0.100 NA NA NA NA 0.0288 2.81
3/15/2022 0.0007 0.031 <0.0002 <0.0005 <0.0010 0.06 <0.0005 <0.0002 <0.0005 <0.0005 0.02 1.48
4/12/2022 NA NA <0.0002 NA NA 0.32 NA NA NA NA 0.04 4.95
5/18/2022 0.0005 0.028 <0.0002 0.0007 <0.0010 0.03 <0.0005 <0.0002 <0.0005 <0.0005 0.02 1.30
6/14/2022 NA NA <0.0002 NA NA 0.02 NA NA NA NA 0.02 0.95
7/14/2022 NA NA <0.0002 NA NA 0.07 NA NA NA NA 0.03 1.4
8/11/2022 <0.0005 0.028 <0.0002 0.0009 <0.0010 0.03 <0.0005 <0.00015 <0.0005 <0.0005 0.02 1.50
9/12/2022 NA NA <0.0002 NA NA 0.03 NA NA NA NA 0.02 2.8
10/7/2022 <0.0005 0.030 <0.0002 0.0015 0.0011 <0.02 <0.0005 <0.00015 <0.0005 <0.0005 0.02 0.31
11/14/2022 0.0007 0.028 <0.0002 0.0012 0.0011 0.02 <0.0005 <0.00015 <0.0005 <0.0005 0.02 1.60
12/12/2022 NA NA <0.0002 NA NA 0.04 NA NA NA NA 0.02 0.49
1/6/2023 NA NA <0.0002 NA NA 0.17 NA NA NA NA <0.01 2.74
1/19/2023 NA NA <0.0002 NA NA 0.06 NA NA NA NA 0.03 0.87
2/2/2023 NA NA <0.0002 NA NA 0.05 NA NA NA NA 0.03 0.52
2/13/2023 NA NA <0.0002 NA NA 0.05 NA NA NA NA 0.03 0.56
3/2/2023 NA NA <0.0002 NA NA 0.06 NA NA NA NA 0.02 0.52
3/16/2023 NA NA 0.0002 NA NA 0.13 NA NA NA NA 0.04 1.20
3/28/2023 NA NA 0.0002 NA NA 0.26 NA NA NA NA 0.05 0.43
4/13/2023 0.0007 0.060 0.0003 <0.0005 0.0020 0.18 0.0005 <0.00015 <0.0005 <0.0005 0.11 0.42
4/26/2023 NA NA 0.0003 NA NA 0.09 NA NA NA NA 0.07 2.05
4/26/2023 DUP NA NA 0.0003 NA NA 0.09 NA NA NA NA 0.07 2.05
5/3/2023 0.0008 0.050 0.0004 0.0005 0.0020 0.16 0.0005 <0.00015 0.000700 <0.0005 0.10 2.45
5/9/2023 NA NA 0.0006 NA NA 0.05 NA NA NA NA 0.14 1.05
5/24/2023 NA NA 0.0010 NA NA 0.03 NA NA NA NA 0.33 0.88
6/6/2023 NA NA 0.0010 NA NA 0.04 NA NA NA NA 0.29 1.34
6/6/2023 Dup NA NA 0.0010 NA NA 0.04 NA NA NA NA 0.29 1.34
6/21/2023 NA NA 0.0006 NA NA 0.02 NA NA NA NA 0.22 0.58
7/6/2023 NA NA 0.0003 NA NA <0.02 NA NA NA NA 0.20 0.31
7/19/2023 <0.0005 0.029 0.0002 0.0014 <0.0010 <0.02 <0.0005 <0.00015 0.000500 <0.0005 0.22 0.24
8/3/2023 NA NA 0.0003 NA NA <0.02 NA NA NA NA 0.21 0.42
8/16/2023 NA NA 0.0002 NA NA <0.02 NA NA NA NA 0.20 0.18
8/16/2023 DUP NA NA 0.0002 NA NA <0.02 NA NA NA NA 0.21 0.18
8/30/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.18 0.52
9/15/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.16 0.37
9/27/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.16 0.20
10/11/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.18 0.37
10/25/2023 <0.0005 0.025 <0.0002 0.0016 <0.0010 <0.02 <0.0005 <0.00015 <0.0005 <0.0005 0.14 0.29
10/25/2023 DUP <0.0005 0.026 <0.0002 0.0016 <0.0010 <0.02 <0.0005 <0.00015 <0.0005 <0.0005 0.14 0.29
11/8/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.16 0.32
11/21/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.17 1.09
12/6/2023 NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.17 1.12
12/20/2023 DUP NA NA <0.0002 NA NA <0.02 NA NA NA NA 0.19 0.48
12/20/2023 NA NA 0.0002 NA NA <0.02 NA NA NA NA 0.19 0.48
1/3/2024 NA NA 0.0002 NA NA 0.02 NA NA NA NA 0.19 0.93
1/17/2024 NA NA 0.0004 NA NA 0.15 NA NA NA NA 0.27 0.75
1/31/2024 NA NA 0.0003 NA NA 0.08 NA NA NA NA 0.22 1.32
2/12/2024 NA NA 0.0005 NA NA 0.57 NA NA NA NA 0.32 2.15
3/4/2024 NA NA 0.0002 NA NA <0.02 NA NA NA NA 0.25 1.25
3/4/2024 DUP NA NA 0.0002 NA NA <0.02 NA NA NA NA 0.25 1.25
3/4/2024 Blank NA NA <0.0002 NA NA <0.02 NA NA NA NA <0.01 0.20
3/13/2024 NA NA 0.0003 NA NA 0.02 NA NA NA NA 0.20 0.68
4/2/2024 NA NA 0.0004 NA NA 0.02 NA NA NA NA 0.21 1.16
4/16/2024 <0.0005 0.044 0.0003 <0.0005 <0.0010 0.03 <0.0005 <0.00015 <0.0005 <0.0005 0.22 0.84
Upper Elevation Collection System
Total Metals Analysis
McHenry Campground 4997675 (Big Dutch Pete Hollow Creek)
Total Metals Analysis
Page 2 of 3 Wasterock Pile Water Quality Monitoring.xlsx, 2/25/2025, Prepared by Van F. King, PG
I I I I I I I I I I I I I
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5/1/2024 NA NA 0.0003 NA NA 0.02 NA NA NA NA 0.23 0.83
5/15/2024 NA NA 0.0002 NA NA 0.02 NA NA NA NA 0.19 0.76
5/15/2024 DUP NA NA 0.0002 NA NA 0.02 NA NA NA NA 0.18 0.76
6/3/2024 NA NA 0.0002 NA NA <0.03 NA NA NA NA 0.22 0.64
6/12/2024 NA NA 0.0002 NA NA <0.03 NA NA NA NA 0.19 0.68
6/28/2024 NA NA <0.0002 NA NA <0.03 NA NA NA NA 0.17 0.61
7/16/2024 <0.0005 0.031 <0.0002 0.0005 <0.0012 <0.03 <0.0005 <0.00016 <0.0007 <0.0005 0.17 0.56
8/1/2024 NA NA 0.0002 NA NA 0.05 NA NA NA NA 0.19 1.15
8/1/2024 DUP NA NA 0.0002 NA NA 0.06 NA NA NA NA 0.18 1.15
8/15/2024 NA NA <0.0002 NA NA 0.04 NA NA NA NA 0.18 1.05
8/30/2024 NA NA <0.0002 NA NA 0.04 NA NA NA NA 0.14 0.74
9/16/2024 NA NA 0.0002 NA NA 0.08 NA NA NA NA 0.17 1.85
9/30/2024 NA NA 0.0002 NA NA 0.05 NA NA NA NA 0.14 1.10
10/16/2024 <0.0005 0.030 0.0002 0.0010 <0.0012 0.06 <0.0005 <0.00016 <0.0007 <0.0005 0.16 1.30
10/16/2024 DUP <0.0005 0.030 0.0002 0.0010 <0.0012 0.05 <0.0005 <0.00016 <0.0007 <0.0005 0.16 1.30
11/1/2024 NA NA <0.0002 NA NA <0.03 NA NA NA NA 0.14 0.75
11/17/2024 NA NA <0.0002 NA NA 0.04 NA NA NA NA 0.14 1.25
12/1/2024 NA NA <0.0002 NA NA 0.06 NA NA NA NA 0.14 0.98
12/16/2024 0.0006 0.029 <0.0002 0.0009 <0.0012 0.07 0.0008 <0.00016 <0.0007 <0.0005 0.15 1.46
12/16/2024 DUP 0.0006 0.027 <0.0002 0.0009 <0.0012 0.07 0.0009 <0.00016 <0.0007 <0.0005 0.15 1.46
1/2/2025 NA NA 0.0002 NA NA 0.22 NA NA NA NA 0.21 2.25
1/16/2025 NA NA 0.0003 NA NA 0.21 NA NA NA NA 0.21 1.95
2/2/2025 NA NA 0.0011 NA NA 2.18 NA NA NA NA 0.45 9.82
2/6/2025 NA NA 0.0002 NA NA 0.10 NA NA NA NA 0.19 1.75
2/10/2025 NA NA 0.0004 NA NA 0.48 NA NA NA NA 0.26 5.42
2/21/2025 NA NA 0.0003 NA NA 0.19 NA NA NA NA 0.26 3.85
Sample
Date
Arsenic
(mg/L)
Barium
(mg/L)
Cadmium
(mg/L)
Chromium
(mg/L)
Copper
(mg/L)
Iron
(mg/L)
Lead
(mg/L)
Mercury
(mg/L)
Selenium
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
Turbidity
(NTU)
Surface Water Screening Level
(mg/L)0.010 1.0 0.00239 0.268 0.0305 1.0 0.0186 0.000012 0.0046 0.0411 0.388 None
Established
10/5/1983 (9:40 AM)0.0035 NA NA NA 0.01 0.58 NA NA NA NA 0.01 2.2
10/5/1983 (4:30 PM)0.02 NA 0.001 NA NA 30 NA NA NA NA 0.005 1.2
12/13/2021 <0.00200 0.0293 <0.000500 <0.00200 <0.00300 0.159 <0.00200 <0.0000900 <0.00200 <0.00200 0.00614 NA
1/14/2022 <0.00200 0.0302 <0.000500 <0.00200 <0.00300 0.192 <0.00200 <0.0000900 <0.00200 <0.00200 0.0100 3.90
2/22/2022 NA NA <0.000500 NA NA 0.265 NA NA NA NA <0.00600 1.79
4/12/2022 NA NA <0.0002 NA NA 0.13 NA NA NA NA 0.01 1.25
6/14/2022 NA NA <0.0002 NA NA 0.03 NA NA NA NA <0.01 1.70
7/14/2022 NA NA <0.0002 NA NA 0.08 NA NA NA NA <0.01 2.03
9/12/2022 NA NA <0.0002 NA NA 0.33 NA NA NA NA 0.01 3.47
9/12/2022 NA NA <0.0002 NA NA 0.33 NA NA NA NA 0.01 3.47
10/7/2022 0.0007 0.029 <0.0002 0.0015 <0.0010 0.09 <0.0005 <0.00015 <0.0005 <0.0005 <0.01 0.35
12/12/2022 NA NA <0.0002 NA NA 0.19 NA NA NA NA <0.01 0.47
1/6/2023 NA NA <0.0002 NA NA 0.2 NA NA NA NA 0.03 0.35
1/19/2023 NA NA <0.0002 NA NA 0.15 NA NA NA NA <0.01 0.44
2/2/2023 NA NA <0.0002 NA NA 0.17 NA NA NA NA <0.01 0.39
2/13/2023 NA NA <0.0002 NA NA 0.14 NA NA NA NA <0.01 0.24
3/2/2023 NA NA <0.0002 NA NA 0.19 NA NA NA NA <0.01 0.41
3/16/2023 NA NA <0.0002 NA NA 0.19 NA NA NA NA 0.01 0.64
3/28/2023 NA NA <0.0002 NA NA 0.18 NA NA NA NA 0.02 0.46
4/13/2023 0.0008 0.048 <0.0002 0.0027 <0.0010 0.16 <0.0005 <0.00015 0.0005 <0.0005 0.08 1.15
4/26/2023 NA NA 0.0002 NA NA 0.31 NA NA NA NA 0.09 1.90
5/9/2023 NA NA 0.0002 NA NA 0.19 NA NA NA NA 0.16 1.34
5/24/2023 NA NA 0.0002 NA NA 0.13 NA NA NA NA 0.14 1.30
6/6/2023 NA NA 0.0003 NA NA 0.08 NA NA NA NA 0.14 0.91
6/21/2023 NA NA 0.0003 NA NA 0.11 NA NA NA NA 0.11 0.98
7/6/2023 NA NA 0.0003 NA NA 0.09 NA NA NA NA 0.10 0.75
7/19/2023 0.0005 0.035 0.0002 0.0015 <0.0010 0.08 <0.0005 <0.00015 0.0006 <0.0005 0.06 0.82
8/3/2023 NA NA 0.0006 NA NA 2.52 NA NA NA NA 0.09 1.62
8/16/2023 NA NA 0.0002 NA NA 1.78 NA NA NA NA 0.06 23.1
8/30/2023 NA NA 0.0002 NA NA 0.32 NA NA NA NA 0.05 2.76
9/15/2023 NA NA <0.0002 NA NA 0.38 NA NA NA NA 0.04 3.51
9/27/2023 NA NA <0.0002 NA NA 0.27 NA NA NA NA 0.03 2.90
10/11/2023 NA NA <0.0002 NA NA 0.27 NA NA NA NA 0.03 2.68
10/25/2023 0.0015 0.034 <0.0002 <0.0005 <0.0010 0.75 <0.0005 <0.00015 0.0007 <0.0005 0.03 8.47
11/8/2023 NA NA <0.0002 NA NA 0.28 NA NA NA NA 0.03 2.24
11/21/2023 NA NA <0.0002 NA NA 0.20 NA NA NA NA 0.03 2.10
12/6/2023 NA NA <0.0002 NA NA 0.43 NA NA NA NA 0.02 2.70
12/20/2023 NA NA <0.0002 NA NA 0.17 NA NA NA NA 0.02 1.62
Note: All concentrations are Total Metals Analysis, NA = Not analyzed, ND = Not Detected, Bold = Above Screening Level
Cunningham Tunnel
Page 3 of 3 Wasterock Pile Water Quality Monitoring.xlsx, 2/25/2025, Prepared by Van F. King, PG
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative. If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Client Service Contact: 801.262.7299
King Water Resources
Attn: Van King
2498 East Nantucket Drive
Salt Lake City, UT 84121
Work Order: 25B1658
Project: Extell Mayflower
2/24/2025
Approved By:
Reed Hendricks, Lab Director
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 7
CHEMTECH FORD
,\DO ~ATO ~ 1-s
_____________________________________________________________________________________________
King Water Resources
Project: Extell Mayflower
Project Manager: Van King
Laboratory ID Sample Name
25B1658-01 McHenry Campground (4997675)
______________________________________________________________________________________________
Work Order Report Narrative
Sample Preparation
All samples were prepared within method specified holding times. No preparation issues were noted.
Method Blanks
All blank values were within method acceptance criteria. No blank values exceeded the minimum reporting limit for any
analysis in this work order.
Laboratory Control Samples
All laboratory control samples were within method acceptance criteria.
Method Spikes
All method spike recoveries were within method acceptance criteria, except as noted by qualifying flags.
Method Spike Duplicates
All method spike duplicates were within method acceptance criteria, except as noted by qualifying flags.
Corrective Actions
There are no corrective actions associated with this work order.
www.ChemtechFord.com
Project Name: Extell Mayflower CtF WO#: 25B1658
Page 2 of 7
CH EMTECH-IFORD
L A 9t)fl A TORIES
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
King Water Resources
Van King
2498 East Nantucket Drive
Salt Lake City, UT 84121
PO#:
Receipt:
Date Reported:
Project Name:
2/21/25 14:18 @ 3.9 °C
2/24/2025
Extell Mayflower
Sample ID: McHenry Campground (4997675)
Lab ID: 25B1658-01Matrix: Water
System No.: UTAH
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/21/25 8:25
Preparation
Date/Time
Sampled By: Van F. King, PG
Minimum
Reporting
Limit MethodResult
Metals
mg/L 2/24/252/24/250.0002 EPA 200.8/200.80.0003Cadmium, Total
mg/L 2/24/252/24/250.03 EPA 200.7/200.20.19Iron, Total
mg/L 2/24/252/24/250.01 EPA 200.8/200.80.26Zinc, Total
Project Name: Extell Mayflower CtF WO#: 25B1658
www.ChemtechFord.com
Page 3 of 7Page 3 of 7
CHE MTEC H -FORD
LAll,OR"AIOli:I ES.
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
King Water Resources
Van King
2498 East Nantucket Drive
Salt Lake City, UT 84121
PO#:
Receipt:
Date Reported:
Project Name:
2/21/25 14:18 @ 3.9 °C
2/24/2025
Extell Mayflower
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Project Name: Extell Mayflower CtF WO#: 25B1658
www.ChemtechFord.com
Page 4 of 7Page 4 of 7
CHE MTEC H -FORD
LAll,OR"AIOli:I ES.
Page 5 of 7
CHAIN OF CUSTODY-SAMPLE SUBMITTAL FORM
COMPANY:
ADDRESS :
EX Utah Development, LLC (Extell Mayflower)
Sample Results: King Water Resources I
CITY/STATE/ZIP : 2498 E. Nantucket Drive, Salt Lake City, UT 84121
,----R-U_S_H_D_u_e_D_a_t_e_*_: ___ -.-----:===---==----, CH~A~J~.fr~~~~RD --------------------------------
PHONE#: [phone] S 24 Hr Rush
CONTACT : Van F. King, PG
EMAIL: [e-mail]
QC levels definition:
Extell Mayflower
QCl: none (default If blank) --------,,-,,-p,""dn-,""'d_M_na-,oo-nd,-,u-,b/.,.,ct ______ QC2: Batch QC, random sr
PROJECT:
PO Number· none
INVOICE EMAIL ADDRESS : [e-mail]
Sample condition
Custody Seal 1.,.-Correct Containers
/ Container Intact ,,-'sufficient Sample Volume Delivery Method , COC/Labels Agree Headspace Present (VOC) UPS USPS
x Received on Ice Temperature Blank FedEx Chemtech-Ford Courier
fl\eceived within Holding Time X Walk-in Customer Courier
'Z-513 /~5%
Lab Use Only CLIENT SAMPLE INFORMATION
LOCATION/ IDENTIFICATION DATE TIME MATRIX
0( 1_ McHenry Camprgound (4997675) .z/211~> <'.l~.'2_;-H20
2 .
3 .
4 .
00
ci
0 ~
E :, .E
-0
"' u
)(
toadd/tionald!arge QO : 25%surcharge,"
your sampl e setectl
QC4 : 40% surchi
; Batch QC,
~.~ I
~<,-
;:::-00 /,,.6' ci ci
0 0 ~Q;'" ~ ~
C u e C
N
)( )(
Chemtech•ford Laboratories
9632 So uth 500 West
Sandy, UT 84070
Phone: 801·262•7299
www.chemtechford.com
I
--
5 . Needs QC 6.
7.
8 .
9. hJ 1$ , (/
10. -f ~ttletype
I '\ /2 !-ot#
Sampled by: [print) Van F. King, PG Sampled by: [signature) )--{< \.-CoN1~ NOT ON ICE Temp(C'): 1 .1 \.
Special Instructions: I ft/~ ( Samples received outside the EPA recommended
f\ I
temperature range of~ C' may be rejected .
Relinquished by: (signature)
)~~ Oat2'2 t! 2.) {~·-(◄
J(eceived by: (si71r:J ;t/ r 07/tt/ts Ii /.f' \ ~
Relinqui shed by : {signatur e) \ Date/time ' Received by: [signature¥" I Oate/nme
Relinquished by: [signature) Date/TTme Received by: (sig nature) Date/TTme
Payment Terms ore net 30 days OAC. 1.5% interes t charge per month (18% per ann um). Cl,ent ogress to pay callect,an costs and attorney's fees.
QC Report for Work Order (WO) - 25B1658
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.7
QC Sample ID: BZB0966-BLK1 Batch: BZB0966
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Iron, Total ND 0.03 1.00
LCS - EPA 200.7
QC Sample ID: BZB0966-BS1 Batch: BZB0966
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Iron, Total 96.2 85 - 115 0.192 0.200 0.03 1.00
Matrix Spike - EPA 200.7
QC Sample ID: BZB0966-MS1 QC Source Sample: 25B1658-01Batch: BZB0966
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Iron, Total 115 70 - 130 0.417 0.186 0.200 0.03 1.00
Matrix Spike Dup - EPA 200.7
QC Sample ID: BZB0966-MSD1 QC Source Sample: 25B1658-01Batch: BZB0966
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Iron, Total 107 4.19 70 - 130 20 0.400 0.186 0.200 0.03 1.00
CtF WO#: 25B1658
www.ChemtechFord.com Page 6 of 7
QC Report for Work Order (WO) - 25B1658
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.8
QC Sample ID: BZB0928-BLK1 Batch: BZB0928
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Cadmium, Total ND 0.0002 1.00
Zinc, Total ND 0.01 1.00
LCS - EPA 200.8
QC Sample ID: BZB0928-BS1 Batch: BZB0928
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Cadmium, Total 93.6 85 - 115 0.037 0.0400 0.0002 1.00
Zinc, Total 100 85 - 115 0.04 0.0400 0.01 1.00
Matrix Spike - EPA 200.8
QC Sample ID: BZB0928-MS1 QC Source Sample: 25B1658-01Batch: BZB0928
Date Prepared: 02/24/2025 Date Analyzed: 02/24/2025
Cadmium, Total 89.2 70 - 130 0.036 0.0003 0.0400 0.0002 1.00
Zinc, Total 73.8 70 - 130 0.29 0.26 0.0400 0.01 1.00
CtF WO#: 25B1658
www.ChemtechFord.com Page 7 of 7
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative. If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Client Service Contact: 801.262.7299
King Water Resources
Attn: Van King
2498 East Nantucket Drive
Salt Lake City, UT 84121
Work Order: 25B0799
Project: Extell Mayflower
2/12/2025
Approved By:
Andrew Royer, Project Manager
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 7
CHEMTECH FORD
,\DO ~ATO ~ 1-s
_____________________________________________________________________________________________
King Water Resources
Project: Extell Mayflower
Project Manager: Van King
Laboratory ID Sample Name
25B0799-01 McHenry Campground (4997675)
______________________________________________________________________________________________
Work Order Report Narrative
Sample Preparation
All samples were prepared within method specified holding times. No preparation issues were noted.
Method Blanks
All blank values were within method acceptance criteria. No blank values exceeded the minimum reporting limit for any
analysis in this work order.
Laboratory Control Samples
All laboratory control samples were within method acceptance criteria.
Method Spikes
All method spike recoveries were within method acceptance criteria, except as noted by qualifying flags.
Method Spike Duplicates
All method spike duplicates were within method acceptance criteria, except as noted by qualifying flags.
Corrective Actions
There are no corrective actions associated with this work order.
www.ChemtechFord.com
Project Name: Extell Mayflower CtF WO#: 25B0799
Page 2 of 7
CH EMTECH-IFORD
L A 9t)fl A TORIES
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
King Water Resources
Van King
2498 East Nantucket Drive
Salt Lake City, UT 84121
PO#:
Receipt:
Date Reported:
Project Name:
2/11/25 12:25 @ 19.5 °C
2/12/2025
Extell Mayflower
Sample ID: McHenry Campground (4997675)
Lab ID: 25B0799-01Matrix: Drinking Water
System No.: UTAH
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/10/25 13:20
Preparation
Date/Time
Sampled By: Van F. King, PG
Minimum
Reporting
Limit MethodResult
Metals
mg/L 2/12/252/11/250.0002 EPA 200.8/200.80.0004Cadmium, Total
mg/L 2/12/252/11/250.03 EPA 200.7/200.70.48Iron, Total
mg/L 2/12/252/11/250.01 EPA 200.8/200.80.26Zinc, Total
Project Name: Extell Mayflower CtF WO#: 25B0799
www.ChemtechFord.com
Page 3 of 7Page 3 of 7
CHE MTEC H -FORD
LAll,OR"AIOli:I ES.
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
King Water Resources
Van King
2498 East Nantucket Drive
Salt Lake City, UT 84121
PO#:
Receipt:
Date Reported:
Project Name:
2/11/25 12:25 @ 19.5 °C
2/12/2025
Extell Mayflower
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Project Name: Extell Mayflower CtF WO#: 25B0799
www.ChemtechFord.com
Page 4 of 7Page 4 of 7
CHE MTEC H -FORD
LAll,OR"AIOli:I ES.
Page 5 of 7
CHAIN OF CUSTODY-SAMPLE SUBMITTAL FORM
coMPANv, EX Utah Development, LLC (Extell Mayflower)
ADDRESS: Sample Results: King Water Resources
CITY/STATE/ZIP: 2498 E. Nantucket Drive, Salt Lake City, UT 84121
PHONE#: [phone]
CONTACT: Van F. King, PG
EMAIL : [e-mail]
PROJECT: Extell Mayflower
PO Number: none
INVOICE EMAIL ADDRESS: [e-mail]
Sample condition
Custodv Seal V Correct Containers
,_
RUSH Due Date*:
Z i hr 2.v~~ '
• Ex~dittd turn around subjrct
to additkxlaf charge
(
v Container Intact v Sufficient Sample Volume Delivery Method
1, ,(QC/Labels Agree Headspace Present (VOC) UPS IUSPS
x Received on Ice l;emperature Blank FedEx IChemtech-Ford Courier 00
1....-Received within Holding Time x Walk-in I customer Courier ci
0
'l.5.J' CJ 1e,'? ~ ;:::-00
E ci ci :, 0 0
Lab Use Only CLIENT SAMPLE INFORMATION 1~ ~ ~
,::, C u
LOCATION/ IDENTIFICATION DATE1 TIME MATRIX "' e C u N -\ 1. McHenry Camprgound (4997675) 2/10/zc,-17 :l() H20 X X X
I
2.
3 .
4 .
5.
6.
7.
8.
9 .
10. r -r
I 80~4~ VV\
< (\ ot# f~O (/)
Sampled by: !print) Van F. King, PG Sampled by : (signature)
} _,.--c-' -/ --'-'--1
c
I
I
QC Level
'QC3 With"Narrativ~
QC levels definition:
QCl: none (default if blank)
QC2: Batch QC, random sample
QC3 : 25% surcharge. Narrative plus Batch QC,
your sample selected
QC4: 40% surcharge. Add raw data
TESTS REQUESTED
I I ) I
RUSH
Dl1744 ~ 2. / )2
CoN~ NOT ON ICE
I
CHEMTECH-FORD
LABORATORIES
Chemtech-Ford laboratories
9632 South 500 West
Sandy, UT 84070
Phone: [phone]
www.chemtechford.com
Temp (C"): 1q -•'V Spec/al Instructions: I
1: ~
r I V ' Samples received outside the EPA recommended
/ -temperature range of 0-6 c• may be rejected .
Relinquished by: [signature)
I ;~---Date/rz /11/2,;-(2 "Z) Receivedby,t i'o All ,I ~ (} \.197 A A _/ D~ ,i /2-5 iz.'.2S \. \
.__,
Relinquished by: [signature] I Date/Time Received b.,l [slin:mfre] . ---Date/t.me f
Relinquished by: [signature) Date/Time Received by: [signature) Date/Tlme
Payment Terms ore net 30 days OAC. 1.5% interest charge per month {18% per annum). ct,ent ogress to pay collect,on costs and attorneys fees.
QC Report for Work Order (WO) - 25B0799
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.7
QC Sample ID: BZB0428-BLK1 Batch: BZB0428
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Iron, Total ND 0.03 1.00
LCS - EPA 200.7
QC Sample ID: BZB0428-BS1 Batch: BZB0428
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Iron, Total 102 85 - 115 0.204 0.200 0.03 1.00
Matrix Spike - EPA 200.7
QC Sample ID: BZB0428-MS2 QC Source Sample: 25B0799-01Batch: BZB0428
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Iron, Total 111 70 - 130 0.697 0.475 0.200 0.03 1.00
Matrix Spike Dup - EPA 200.7
QC Sample ID: BZB0428-MSD2 QC Source Sample: 25B0799-01Batch: BZB0428
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Iron, Total 120 2.66 70 - 130 20 0.715 0.475 0.200 0.03 1.00
CtF WO#: 25B0799
www.ChemtechFord.com Page 6 of 7
QC Report for Work Order (WO) - 25B0799
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.8
QC Sample ID: BZB0438-BLK1 Batch: BZB0438
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Cadmium, Total ND 0.0002 1.00
Zinc, Total ND 0.01 1.00
LCS - EPA 200.8
QC Sample ID: BZB0438-BS1 Batch: BZB0438
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Cadmium, Total 96.5 85 - 115 0.039 0.0400 0.0002 1.00
Zinc, Total 109 85 - 115 0.04 0.0400 0.01 1.00
Matrix Spike - EPA 200.8
QC Sample ID: BZB0438-MS3 QC Source Sample: 25B0799-01Batch: BZB0438
Date Prepared: 02/11/2025 Date Analyzed: 02/12/2025
Cadmium, Total 101 70 - 130 0.041 0.0004 0.0400 0.0002 1.00
Zinc, Total 159 70 - 130 0.32 0.26 0.0400 0.01 1.00
QM-4X - The spike recovery was outside of QC acceptance limits for the MS and/or MSD due to analyte concentration at 4
times or greater the spike concentration. The QC batch was accepted based on LCS and/or LCSD recoveries within the
acceptance limits.
CtF WO#: 25B0799
www.ChemtechFord.com Page 7 of 7