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B-19 <br /> through early 2019 (consisting of hollow-stem auger borings typically extending no deeper than 30 ft.bgs) <br /> reported similar shallow(perched)groundwater occurrences in six borings,as shown in the following Table <br /> B-4: Perched Groundwater Occurrences. <br /> TABLE B-4 <br /> PERCHED GROUNDWATER OCCURRENCES <br /> DH No. Coordinates Depth to GW Distance From PA* <br /> GR-02 40.149445 N; -105.506429 W 8 ft. 1,500 ft.North <br /> GR-35 40.158738 N; -104.507770 W 23 ft. 4,800 ft.North <br /> GR-37 40.153462 N; -104.507498 W 27 ft. 2,200 ft.North <br /> GR-38 40.153483 N; -104.499857 W 18 ft. 2,500 ft.Northeast <br /> GR-39 40.153304 N; -104.491942 W 5 ft. 5,000 ft. E-Northeast <br /> GR-40 40.146267 N; -104.491692 W 5 ft. 4,500 ft. East <br /> GR-43 40.147006 N; -104.507979 W 23 ft. Adjacent to NW Line <br /> *PA="Permit Area"(Location/Distance Approximate) <br /> Drill holes GR-39 and GR-40 are both located immediately proximal to the Ennis Draw feature,where the <br /> presence of shallow groundwater would be anticipated, as confirmed by the so-determined 5 ft. depth. <br /> The other five drill holes (GR-2, GR-35, GR-37, and GR-38) are dispersed throughout the remainder of <br /> Section 12 (at locations somewhat distant from the Permit Area), and are demonstrative of the variability <br /> in depth at which shallow(perched)groundwater occurrences are present. <br /> Notably,one drill hole completed adjacent to the Permit Area(GR-43)encountered groundwater at a depth <br /> of approximately 23 ft. bgs; yet, another drill hole (GR-42; not listed in the above table) located <br /> approximately 400-ft. to the southeast of GR-43 (and within the footprint area of the proposed mine pit) <br /> did not encounter groundwater to its terminal depth of approximately 55-ft. This is consistent with another <br /> drill hole completed proximal to the Permit Area(GR-41; also not listed in the above table)which did not <br /> encounter groundwater, with a terminal depth of 18 ft.; although, GR-41 was collared at a location <br /> approximately 2,000 ft. to the east of the Permit Area. This data suggests that there is a high degree of <br /> lateral discontinuity with respect to perched groundwater presence, as well. <br /> In summary, site characterization indicates the presence of random and discontinuous occurrences of <br /> shallow,perched groundwater zones and/or saturated conditions within the uppermost(20 to 30 ft.) depth <br /> interval, which is mainly comprised of eolian sand and/or interspersed clayey sand lenses. Typically, the <br /> Keenesburg Project—Limited Impact 110 Application_May 24,2019 <br />