DERR-2025-003568

0 140 280 420 560
Feet
!.
!.
!.!.
!.!.!.!.
@?
@?
@?
@?
@?
@?
@?
@?@?
GW8
GW9a
GW2
GW4GW6
(repaired)
GW3
(abandoned)Property
Line Sump
GW7c
(abandoned)
McHenry
Campground
(4997675)
Cunningham Tunnel
Sampling Location
GW5
(abandoned)
GW7b
(abandoned)
GW1
(abandoned)
US40
Culvert
OutletGW9
(abandoned)
GW13
GW12
GW11
GW10
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
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
US 40 Culvert Outlet (East Side of US 40)
Total Metals Analysis
Property Line Sump (Well Discharge)
Page 1 of 4 Wasterock Pile Water Quality Monitoring.xlsx, 5/6/2025, Prepared by Van F. King, PG
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
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
Upper Elevation Collection System
Total Metals Analysis
McHenry Campground 4997675 (Big Dutch Pete Hollow Creek)
Total Metals Analysis
Page 2 of 4 Wasterock Pile Water Quality Monitoring.xlsx, 5/6/2025, Prepared by Van F. King, PG
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
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
3/7/2025 NA NA 0.0003 NA NA 0.22 NA NA NA NA 0.22 2.47
3/7/2025 DUP NA NA 0.0003 NA NA 0.14 NA NA NA NA 0.20 2.47
3/7/2025 Blank NA NA <0.0002 NA NA <0.03 NA NA NA NA <0.01 0.67
3/26/2025 0.0006 0.038 0.0002 0.0011 0.0010 0.09 <0.0005 <0.00015 <0.0006 <0.0005 0.13 1.58
4/15/2025 NA NA 0.0005 NA NA 0.15 NA NA NA NA 0.31 2.05
5/1/2025 NA NA 0.0004 NA NA 0.13 NA NA NA NA 0.26 2.11
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
Cunningham Tunnel
Page 3 of 4 Wasterock Pile Water Quality Monitoring.xlsx, 5/6/2025, Prepared by Van F. King, PG
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
Page 4 of 4 Wasterock Pile Water Quality Monitoring.xlsx, 5/6/2025, Prepared by Van F. King, PG
Extell WL Monitoring.xlsx, 5/3/2025, 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
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
Gr
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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
Gr
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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
Gr
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Monitoring Well GW9a
GW9a Waste Rock
/ Native Soil Interface
Extell WL Monitoring.xlsx, 5/3/2025, 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: 25D1285
Project: Extell Mayflower
4/23/2025
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
_____________________________________________________________________________________________
King Water Resources
Project: Extell Mayflower
Project Manager: Van King
Laboratory ID Sample Name
25D1285-01 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#: 25D1285
Page 2 of 7
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:
4/15/25 15:55 @ 5.7 °C
4/23/2025
Extell Mayflower
Sample ID: McHenry Campground (4997675)
Lab ID: 25D1285-01Matrix: Water
System No.: UTAH
Flag(s)Units
Analysis
Date/Time
Date Sampled: 4/15/25 12:45
Preparation
Date/Time
Sampled By: Van F. King, PG
Minimum
Reporting
Limit MethodResult
Metals
mg/L 4/17/254/16/250.0002 EPA 200.8/200.20.0005Cadmium, Total
mg/L 4/17/254/16/250.03 EPA 200.7/200.20.15Iron, Total
mg/L 4/17/254/16/250.01 EPA 200.8/200.20.31Zinc, Total
Project Name: Extell Mayflower CtF WO#: 25D1285
www.ChemtechFord.com
Page 3 of 7Page 3 of 7
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:
4/15/25 15:55 @ 5.7 °C
4/23/2025
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#: 25D1285
www.ChemtechFord.com
Page 4 of 7Page 4 of 7
Page 5 of 7
QC Report for Work Order (WO) - 25D1285
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.7
QC Sample ID: BZD0876-BLK1 Batch: BZD0876
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Iron, Total ND 0.03 1.00
LCS - EPA 200.7
QC Sample ID: BZD0876-BS1 Batch: BZD0876
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Iron, Total 96.5 85 - 115 0.193 0.200 0.03 1.00
Matrix Spike - EPA 200.7
QC Sample ID: BZD0876-MS1 QC Source Sample: 25D1285-01Batch: BZD0876
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Iron, Total 107 70 - 130 0.361 0.148 0.200 0.03 1.00
Matrix Spike Dup - EPA 200.7
QC Sample ID: BZD0876-MSD1 QC Source Sample: 25D1285-01Batch: BZD0876
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Iron, Total 103 2.04 70 - 130 20 0.354 0.148 0.200 0.03 1.00
CtF WO#: 25D1285
www.ChemtechFord.com Page 6 of 7
QC Report for Work Order (WO) - 25D1285
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.8
QC Sample ID: BZD0888-BLK1 Batch: BZD0888
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Cadmium, Total ND 0.0002 1.00
Zinc, Total ND 0.01 1.00
LCS - EPA 200.8
QC Sample ID: BZD0888-BS1 Batch: BZD0888
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Cadmium, Total 98.3 85 - 115 0.039 0.0400 0.0002 1.00
Zinc, Total 98.6 85 - 115 0.04 0.0400 0.01 1.00
Matrix Spike - EPA 200.8
QC Sample ID: BZD0888-MS1 QC Source Sample: 25D1285-01Batch: BZD0888
Date Prepared: 04/16/2025 Date Analyzed: 04/17/2025 mg/LUnits:
Cadmium, Total 95.3 70 - 130 0.039 0.0005 0.0400 0.0002 1.00
Zinc, Total 100 70 - 130 0.35 0.31 0.0400 0.01 1.00
CtF WO#: 25D1285
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: 25E0091
Project: Extell Mayflower
5/6/2025
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
_____________________________________________________________________________________________
King Water Resources
Project: Extell Mayflower
Project Manager: Van King
Laboratory ID Sample Name
25E0091-01 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#: 25E0091
Page 2 of 7
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:
5/1/25 15:50 @ 16.4 °C
5/6/2025
Extell Mayflower
Sample ID: McHenry Campground (4997675)
Lab ID: 25E0091-01Matrix: Water
Site ID: 4997675 System No.: UTAH
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/1/25 13:42
Preparation
Date/Time
Sampled By: Van F. King, PG
Minimum
Reporting
Limit MethodResult
Metals
mg/L 5/2/255/2/250.0002 EPA 200.8/200.20.0004Cadmium, Total
mg/L 5/2/255/2/250.03 EPA 200.7/200.20.13Iron, Total
mg/L 5/2/255/2/250.01 EPA 200.8/200.20.26Zinc, Total
Project Name: Extell Mayflower CtF WO#: 25E0091
www.ChemtechFord.com
Page 3 of 7Page 3 of 7
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:
5/1/25 15:50 @ 16.4 °C
5/6/2025
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#: 25E0091
www.ChemtechFord.com
Page 4 of 7Page 4 of 7
Page 5 of 7
QC Report for Work Order (WO) - 25E0091
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.7
QC Sample ID: BZE0114-BLK1 Batch: BZE0114
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Iron, Total ND 0.03 1.00
LCS - EPA 200.7
QC Sample ID: BZE0114-BS1 Batch: BZE0114
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Iron, Total 100 85 - 115 0.200 0.200 0.03 1.00
Matrix Spike - EPA 200.7
QC Sample ID: BZE0114-MS1 QC Source Sample: 25E0091-01Batch: BZE0114
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Iron, Total 98.6 70 - 130 0.331 0.134 0.200 0.03 1.00
Matrix Spike Dup - EPA 200.7
QC Sample ID: BZE0114-MSD1 QC Source Sample: 25E0091-01Batch: BZE0114
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Iron, Total 101 1.62 70 - 130 20 0.336 0.134 0.200 0.03 1.00
CtF WO#: 25E0091
www.ChemtechFord.com Page 6 of 7
QC Report for Work Order (WO) - 25E0091
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 200.8
QC Sample ID: BZE0073-BLK1 Batch: BZE0073
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Cadmium, Total ND 0.0002 1.00
Zinc, Total ND 0.01 1.00
LCS - EPA 200.8
QC Sample ID: BZE0073-BS1 Batch: BZE0073
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Cadmium, Total 94.2 85 - 115 0.038 0.0400 0.0002 1.00
Zinc, Total 103 85 - 115 0.04 0.0400 0.01 1.00
Matrix Spike - EPA 200.8
QC Sample ID: BZE0073-MS1 QC Source Sample: 25E0091-01Batch: BZE0073
Date Prepared: 05/02/2025 Date Analyzed: 05/02/2025 mg/LUnits:
Cadmium, Total 89.7 70 - 130 0.036 0.0004 0.0400 0.0002 1.00
Zinc, Total 69.0 70 - 130 0.29 0.26 0.0400 0.01 1.00
QM-05 - The spike recovery was outside acceptance limits for the MS and/or MSD due to matrix interference. The analytical
batch was accepted based on the acceptable data provided by the Laboratory Control Sample(s) [LCS] and/or LCS Duplicates.
CtF WO#: 25E0091
www.ChemtechFord.com Page 7 of 7