The U.S. Department of Commerce uses the North American Industrial Classification System, or NAICS to define industries.
The code for “Industrial Sand Mining” is 212322: “This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) operating industrial grade sand pits; (2) dredging for industrial grade sand; and (3) washing, screening, or otherwise preparing industrial grade sand.”
The code for “Construction Sand and Gravel Mining” is 212321: “This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) operating commercial grade (i.e., construction) sand and gravel pits; (2) dredging for commercial grade sand and gravel; and (3) washing, screening, or otherwise preparing commercial grade sand and gravel.”
Minnesota Statute 6125.8100 defines “Industrial Minerals” as “apatite, diamonds, dimension stone, feldspar, gemstones, graphite, kaolin, marl, quartz, silica sand, and other similar minerals of a nonmetalliferous nature.” It goes onto say: “The term industrial minerals does not include,…peat and construction sand and gravel…”.
These two specifications, as well as those specified by Wisconsin, define “a frac sand mine” as “an industrial facility.” So, why is Goodhue County lumping the two definitions together and defining "industrial" activities as an agricultural?
Interactive map: Frac sand facilities in MN &WI View
Minnesota and Wisconsin are four years into a sand mining boom. This map shows facilities that involve the mining, processing or transportation of frac sand. Sites that have permits to do such work and ones that are proposed are shown. (Star Tribune)
MNPCA: Nonmetallic mining and associated activities: Permit MNG490000 View
"The General Permit for Nonmetallic Mining and Associated Activities (MNG490000) is a specific type of permit covering both stormwater and wastewater. It is also a multi-site permit, meaning all qualifying sites can be covered with a single permit application. This permit authorizes stormwater discharges to surface waters of the state..."
OSHA recently released a proposed rule to protect workers exposed to respirable crystalline silica. OSHA estimates that the proposed rule will save nearly 700 lives and prevent 1,600 new cases of silicosis per year, once the full effects of the rule are realized.