Laserfiche WebLink
D-26 <br /> PROCESSING PLANT OPERATIONS <br /> The Keenesburg Project will employ wet and dry processing stages to produce a singular saleable product <br /> comprised of#30/#140 industrial sand. All mined materials will be processed onsite,employing both wet <br /> (wash) and dry(thermal drying followed by screening)process unit operations typical of those utilized in <br /> the sand and gravel industry. <br /> A plan-view layout of the major components of the Keenesburg No.2 Mine's plant facilities is provided as <br /> Figure D-1: Plant Facilities Layout,with major components of the plant facilities being described, in a <br /> process flow sequence, as follows. The process flow sheet is also described following, and graphically <br /> depicted in Figure D-2: Process Flow Schematic. <br /> Overview-General Process Flow <br /> All mined materials will be processed onsite,employing both wet(wash)and dry(thermal drying followed <br /> by screening)process unit operations typical of those utilized in the sand and gravel industry. <br /> CSC notes that no hazardous or toxic process "reagents" will be introduced during the wet (or any other <br /> component) of the process; however, minor quantities of polymers (such as Clearwater Industries, Inc. <br /> "CW3M")will be utilized to facilitate the fines settling process. Such polymers are widely and routinely <br /> utilized in industrial sand mining and processing facilities throughout the U.S. and internationally. These <br /> products have been demonstrated to be non-toxic, with short duration degradation characteristics, as <br /> discussed in the`Barr White Paper—Environmental Impacts of Water Treatment Chemicals at Industrial <br /> Sand Mines" (Barr Engineering Company; 2013). Both the "white paper" and the Material Safety Data <br /> Sheet(MSDS)for the CW3M polymer product are provided in Attachment D-1: Use of Polymers. <br /> The "wet plant"will utilize a wet rinse scalper to initially remove oversize material(i.e., greater than %" <br /> material), which will report to an oversize reject stockpile. A secondary screening process will further <br /> reduce the top size of product to#30 mesh(0.0236 inch),with the 1/2"x#30 fraction also reporting to the <br /> oversize stockpile. As space constraints dictate, the minor quantities of oversize material will be <br /> subsequently utilized in miscellaneous site grading and/or as pit backfill. <br /> Keenesburg No. 2 Mine_112 Reclamation Operation—November 22, 2019 <br />