County Maintenance Inspections * Real Estate Inspections (Done by a licensed septic installer)* DNR License No. 2248 * Septic Tanks & Holding Tanks Pumped * Septic Tank Filter Cleaning. County Maintenance Inspections * Real Estate Inspections (Done by a licensed septic installer)* DNR License No. 2248 * Septic Tanks & Holding Tanks Pumped * Septic Tank Filter Cleaning