NEW AUBRUN, WI (WTAQ) - At least one school district in western Wisconsin is working to keep frac-sand out of its classrooms.
New Auburn District Administrator Brian Henning said his schools are using higher-quality air filters, to avoid getting fine silica sand that's being mined at four locations within several miles of the schools.
The new air filters cost around $1,500 for the year -- double of what the New Auburn district is accustomed to spending.
Dust scrapings from the new air filters were sent to a lab in Madison for testing -- and a small amount of silica sand was discovered on the filters.
Wisconsin has over 100 frac sand mines, where silica sand is being removed for use in domestic oil-and-gas drilling equipment.