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B-20 <br /> occurrences are within or associated with the deeper, clayey sand lenses; and, are of such limited lateral <br /> and depth extent that they cannot be considered exploitable "aquifers". The one available water well <br /> completion log is indicative that the first encountered and exploitable"economic"aquifer zone is at a depth <br /> in excess of 500 ft. bgs, with an overlying or confining zone (extending from approximately 15 ft. to in <br /> excess of 400 ft.bgs) of alternating"shale"and"rock"strata. <br /> Based on the nature of the proposed mining and processing operations (as further described in Exhibit C: <br /> Mining Plan), no adverse effect on either localized or regional groundwater resources is anticipated: <br /> • While a total of three(3)process water supply alternatives are being evaluated[refer to Exhibit C: <br /> Mining Plan— Sections (h)through 0) for further detail], one (1) of the options being considered <br /> involves the purchase of surface-water derived supplies; and, the remaining two (2) options are <br /> based on the potential purchase of groundwater derived supply sourced from third-party owned <br /> industrial wells completed(or to be completed) in the Laramie-Fox Hills aquifer system, which is <br /> locally present at depths in excess of 500 ft. below ground surface. Thus, no groundwater is <br /> anticipated to be encountered as a direct result of mining; and, to the extent groundwater may be <br /> employed as process water supply, such groundwater will be purchased from fully-permitted <br /> industrial water wells proximal to the area. <br /> • Potential run-on from precipitation will be diverted around the active mining area; and, footprint <br /> area(precipitation) storm water will be contained within the Permit Area boundaries and diverted <br /> to the fines recovery pit(see also Exhibit C: Mining Plan for further discussion in this regard). <br /> • No deleterious process reagents will be employed in the wet plant sand "wash" process (see also <br /> Exhibit C: Mining Plan for further discussion in this regard). <br /> (d) WILDLIFE <br /> The Permit Area(within Section 12) and surrounding areas were reviewed for the potential occurrence of <br /> sensitive wildlife species, to include Federal or State listed species, in order to identify wildlife resources <br /> and document habitat within the immediate Project area. The assessment(refer again to Attachment B-1: <br /> Environmental Resource Report; Rettew Associates, Inc.; 2019) included both a "desktop review" and <br /> subsequent field investigation. Species considered included: (a)those listed by the U.S. Fish and Wildlife <br /> Service (USFWS) at threatened, endangered, proposed, or candidate species; and, (b) State of Colorado <br /> Keenesburg Project—Limited Impact 110 Application_May 24,2019 <br />