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2013 <br /> Barr white paper October <br /> 0 Barr Engineering Co. <br /> Environmental Impacts of Water Treatment <br /> Chemicals at Industrial Sand Mines <br /> summary quality degradation by the use of the <br /> The silica sand unique to western two most common flocculants—or set- <br /> Wisconsin and southeastern Minnesota tling agents—at these mines, polyacryl- <br /> is used as a proppant in the hydraulic amide and polydimethyldiallyammonium <br /> fracturing process that is fueling the chloride (polyDADMAC).Although other <br /> resurgence in domestic energy produc- types of flocculants are in use,these <br /> tion. Siting and permitting of these "frac chemicals currently appear to make up a <br /> sand" mines tend to be controversial, majority of our clients'flocculant use. <br /> with opponents focusing on potential introduction <br /> negative impacts of increased truck traf- Polyacrylamide anionic flocculants are <br /> fic, changing land use, air emissions, and commonly used to enhance settling of <br /> concerns about water quality.This paper solids in the clarifier associated with <br /> explores concerns about potential water the wash plant at a silica sand facility. <br /> - • - • • t <br /> Keenesburg No. 2 Mine_112 Reclamation Operation—November 22, 2019 <br />