1812_DukeMarshall _ILF Biweekly Monitoring Data_FID1772614_20211209

Monitoring Location Northing Easting Installation Date Final Depth (feet BGS) Piezometer Depth (feet BGS) Piezometer Screen Interval (feet BGS) Ground Surface Elevation (feet NAVD
88) Top of Casing Elevation (feet NAVD 88) 44342 44362 7/19/2021* 44404 44417 8/11/2021^ 44434 44453 9/30/2021* 44470 44475 10/14-15/2021 44490 44497 44503 11/15/2021* 11/18/2021(3)
44533
Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation
(feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater
Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC)
Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water
(feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88)
Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation
(feet NAVD 88) Depth to Water (feet BTOC) Groundwater Elevation (feet NAVD 88)
CLF-301 685838.4 1413513.3 05/21/2021 65 62 52-62 844.46 847.46 20.49 826.97 29.74 817.72 30.1 817.36 30.24 817.22 30.29 817.17 30.35 817.11 30.6 816.86 30.75 816.71 31.47 815.99 31.02
816.44 NM NM 31.19 816.27 31.25 816.21 31.36 816.1 31.49 815.97 31.6 815.86 31.58 815.88 31.46 816
CLF-302 685373 1413718.8 05/13/2021 52 50 40-50 829.06 832.1 17.5 814.6 18.03 814.07 19.14 812.96 19.12 812.98 19.8 812.3 19.91 812.19 19.28 812.82 20.51 811.59 21.11 810.99 21.13 810.97
NM NM 21.48 810.62 21.54 810.56 21.85 810.25 22.09 810.01 22.08 810.02 22.17 809.93 22.66 809.44
CLF-303 684951.1 1413840.3 05/12/2021 42 40 30-40 821.16 824.31 22.48 801.83 22.9 801.41 23.63 800.68 23.79 800.52 23.95 800.36 23.99 800.32 24.17 800.14 24.41 799.9 24.62 799.69 24.55
799.76 NM NM 24.73 799.58 24.78 799.53 24.84 799.47 24.91 799.4 24.95 799.36 24.97 799.34 24.93 799.38
CLF-304 684062.2 1413563.4 05/24/2021 62 60 50-60 820.56 823.28 23.84 799.44 24.23 799.05 24.6 798.68 24.71 798.57 24.82 798.46 24.85 798.43 24.97 798.31 25.1 798.18 25.29 797.99 25.17
798.11 NM NM 25.26 798.02 25.21 798.07 25.32 797.96 25.38 797.9 25.43 797.85 25.41 797.87 25.51 797.77
CLF-401 685783.5 1412779.5 05/17/2021 41 39 29-39 829.3 832.44 16.02 816.42 16.01 816.43 16.73 815.71 16.8 815.64 17.01 815.43 17.05 815.39 17.1 815.34 17.13 815.31 17.84 814.6 17.53
814.91 NM NM 17.56 814.88 17.78 814.66 17.95 814.49 18.16 814.28 18.19 814.25 18.1 814.34 18.46 813.98
CLF-402 685598.8 1413217.8 05/21/2021 52 50 40-50 815.41 818.41 17.29 801.12 6.28 812.13 6.39 812.02 6.43 811.98 6.94 811.47 7.02 811.39 7.19 811.22 7.23 811.18 7.98 810.43 7.6 810.81
NM NM 8.13 810.28 8.31 810.1 8.45 809.96 8.54 809.87 8.59 809.82 8.44 809.97 8.64 809.77
CLF-403 685408.1 1412807.2 05/19/2021 58 56 46-56 823.47 826.39 14.24 812.15 14.14 812.25 14.2 812.19 14.46 811.93 14.91 811.48 15.01 811.38 14.84 811.55 15.35 811.04 16.75 809.64 15.71
810.68 NM NM 15.78 810.61 16.09 810.3 16.25 810.14 16.16 810.23 16.14 810.25 15.85 810.54 16.17 810.22
CLF-404 685024.8 1412910.8 05/17/2021 41 39 29-39 825.12 828.14 16.71 811.43 16.74 811.4 16.75 811.39 16.99 811.15 17.42 810.72 17.49 810.65 17.45 810.69 17.83 810.31 18.3 809.84 18.03
810.11 NM NM 18.52 809.62 18.41 809.73 18.56 809.58 18.53 809.61 18.56 809.58 18.41 809.73 18.33 809.81
CLF21-10 687020.1 1412353.4 08/06/2021 32 32 22-32 857.7 857.74927 NI NI NI NI NI NI NI NI NI NI 16.69 841.05927 16.7 841.04927 16.65 841.09927 16.81 840.93927 16.88 840.86927 NM NM
16.82 840.92927 16.79 840.95927 16.83 840.91927 17.03 840.71927 16.96 840.78927 16.87 840.87927 16.93 840.81927
CLF21-11 686572.3 1412572.2 08/05/2021 40 40 30-40 848.3 848.52515 NI NI NI NI NI NI NI NI NI NI 19.75 828.77515 19.96 828.56515 20.4 828.12515 21.62 826.90515 21.72 826.80515 NM NM
22.9 825.62515 22.61 825.91515 22.65 825.87515 22.86 825.66515 22.95 825.57515 22.95 825.57515 23.13 825.39515
CLF21-12 686217.4 1412518.2 08/05/2021 42 40 30-40 837.7 837.83968 NI NI NI NI NI NI NI NI NI NI 14.82 823.01968 14.68 823.15968 15.68 822.15968 17.93 819.90968 18.08 819.75968 NM NM
18.3 819.53968 18.19 819.64968 18.17 819.66968 18.25 819.58968 18.26 819.57968 18.3 819.53968 18.49 819.34968
CLF21-13 686092.2 1412818.3 08/05/2021 35 35 25-35 836.6 836.76302 NI NI NI NI NI NI NI NI NI NI 17.57 819.19302 16.68 820.08302 16.58 820.18302 17.11 819.65302 17.09 819.67302 NM NM
17.4 819.36302 17.61 819.15302 NM NM AB AB AB AB AB AB AB AB
CLF21-13R 686085.92 1412818.66 11/04/2021 37 35 25-35 835.52 835.75 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 17.21 818.54 17.19 818.56
17.46 818.29
CLF21-14 686027.1 1414268.7 08/10/2021 36 36 26-36 838.4 841.56162 NI NI NI NI NI NI NI NI NI NI 19.96 821.60162 20.55 821.01162 20.9 820.66162 21.54 820.02162 21.73 819.83162 NM NM
21.95 819.61162 22.07 819.49162 22.24 819.32162 22.44 819.12162 22.75 818.81162 22.79 818.77162 22.26 819.30162
CLF21-15 686307.7 1414410 08/10/2021 55 55 45-55 861.2 864.37482 NI NI NI NI NI NI NI NI NI NI NM NM 38.54 825.83482 38.9 825.47482 39.29 825.08482 39.41 824.96482 NM NM 39.61 824.76482
39.68 824.69482 39.82 824.55482 40.01 824.36482 40.24 824.13482 40.22 824.15482 40.59 823.78482
CLF21-16 686542.7 1413113.4 08/06/2021 26.5 26 16-26 827.6 830.84749 NI NI NI NI NI NI NI NI NI NI 8.28 822.56749 8.56 822.28749 7.93 822.91749 9.16 821.68749 9.61 821.23749 NM NM AB
AB AB AB AB AB AB AB AB AB AB AB AB AB
CLF21-17 686175.2 1413059.8 08/06/2021 30 30 20-30 827.6 830.75871 NI NI NI NI NI NI NI NI NI NI 10.95 819.80871 10.51 820.24871 10.7 820.05871 11.18 819.57871 NM NM NM NM 11.91 818.84871
11.72 819.03871 11.71 819.04871 12.15 818.60871 12.13 818.62871 12.2 818.55871 12.36 818.39871
CLF21-18 686685.41518 1412751.78604 10/08/2021 25 25 15-25 834.79 834.7936 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 10.12 824.6736 10.12 824.6736 10.22 824.5736 10.29
824.5036 10.27 824.5236 10.3 824.4936 10.3 824.4936 10.41 824.3836
CLF21-19 686656.92213 1413082.17758 10/08/2021 25 25 15-25 827.73 830.48029 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 7.81 822.67029 7.81 822.67029 7.61 822.87029 7.63
822.85029 8.1 822.38029 8 822.48029 8.04 822.44029 8.13 822.35029
CLF21-20 686373.5564 1413106.91142 10/08/2021 30 30 20-30 831.55 831.55335 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 10.75 820.80335 10.75 820.80335 10.91 820.64335
10.53 821.02335 11.02 820.53335 10.8 820.75335 10.91 820.64335 10.99 820.56335
GWA-04D 686783.39 1411776.91 06/12/2015 87 86 81-86 899.3796 902.45 NM NM NM NM 50.54 851.91 NM NM NM NM NM NM NM NM NM NM 51.48 850.97 NM NM 51.61 850.84 51.74 850.71 51.8 850.65 51.91
850.54 52.05 850.4 52.15 850.3 52.17 850.28 52.34 850.11
GWA-04S 686776.57 1411777.35 05/19/2015 65 64 49-62 898.9754 901.97 NM NM NM NM 50.79 851.18 NM NM NM NM NM NM NM NM NM NM 51.71 850.26 NM NM 51.82 850.15 51.95 850.02 51.92 850.05 52.07
849.9 52.26 849.71 52.4 849.57 52.3 849.67 52.49 849.48
ILF-02D 687699.24 1413205.78 03/31/2019 107 102 92-102 885.57 885.14 NM NM NM NM 40.12 845.02 NM NM NM NM NM NM NM NM NM NM 39.9 845.24 NM NM 40.82 844.32 39.81 845.33 39.71 845.43 39.74
845.4 39.82 845.32 39.79 845.35 39.66 845.48 39.59 845.55
ILF-02S 687699.26 1413214.68 03/31/2019 52 52 42-52 885.21 884.79 NM NM NM NM 43 841.79 NM NM NM NM NM NM NM NM NM NM 42.8 841.99 NM NM 42.8 841.99 41.44 843.35 42.6 842.19 42.63 842.16
42.78 842.01 43.7 841.09 42.55 842.24 42.51 842.28
MW-04 686658 1414395 06/30/1989 49 47 37-47 863.75 867.15 NM NM NM NM 34.6 832.55 NM NM NM NM NM NM NM NM NM NM 35.39 831.76 NM NM 35.77 831.38 35.8 831.35 35.71 831.44 35.82 831.33
35.98 831.17 35.12 832.03 36.09 831.06 36.25 830.9

MW-04D 686715 1414462 10/12/2006 60.5 60 55-60 863.37 866.74 NM NM NM NM 34.77 831.97 NM NM NM NM NM NM NM NM NM NM 35.52 831.22 NM NM 35.65 831.09 35.75 830.99 35.8 830.94 35.83 830.91
35.25 831.49 36.45 830.29 36.25 830.49 36.61 830.13
MW-07 (OB-3) 685380.1 1414418 12/16/2010 54 54 39-54 856.56 859.16 NM NM NM NM 41.05 818.11 NM NM NM NM NM NM NM NM NM NM 41.44 817.72 NM NM 41.48 817.68 41.61 817.55 41.55 817.61 41.6
817.56 42.29 816.87 41.85 817.31 41.97 817.19 41.98 817.18
CLF-UD (Underdrain Sump)(1) 686346.15 1412653.7484 10/21/2021 NA NA NA NA NA NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NA 811.17 (± 0.2) NA 811.18 (± 0.2)
NA 812.37 (± 0.5) NA See note (2) NA 811.28 (± 0.04) NA 811.1 (± 0.2)
Notes:
Coordinates shown in NAD83/2001 North Carolina State Plan Grid Coordinates.
Horizontal Datum used is NAD 83/2011 (US Survey Feet), Vertical Datum used is NAVD 88 (US Survey Feet).
* - Depth to water measurements collected by Pace Analytical, Inc. during a site-wide water level sweep
^ - Depth to water measurement for CLF21-10 was collected on 8/10/2021.
(1) CLF-UD location is the transducer installed in the underdrain sump side slope riser. The groundwater elevation is the average elevation from the entire transducer record on that
date.
(2) Transducer data for the underdrain on this date will be provided in the next update. Data files downloaded and provided to Duke by consultants for this update incidentally excluded
data prior to 11/18/21. All data is stored on the transducer, the miss is related to a function of how the data was downloaded.
(3) The underdrain sump's construction dewatering pump was replaced with the temporary pump on 11/16/21.
BGS- Below Ground Surface
BTOC - Below Top of Casing
NI - Not Installed
NM - Not Measured
NAVD 88 - North American Vertical Datum of 1988