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On the Need for an Environmental Assessment Worksheet Findings of Fact Bituminous Roadways, Inc. Hot Mix Asphalt Plant Project Conclusions of Law Columbus, Minnesota And Order 10 Air Quality – Dust 53. Minn. R. pt. 7011.0150 requires Bituminous to prevent fugitive dust emissions from becoming airborne at the Project site. The Project design includes primary and secondary filtering systems at the hot mix asphalt production process to capture fine sands and dust emissions. The coarsest particles are captured in the primary collector and returned to the production mix. The finer particles are collected in the secondary collector and returned to the production mix. 54. Bituminous will regularly spray any portable crusher and screens used to crush asphalt and cement rubble to reduce dust. 55. The Bituminous CUP application (Appendix A of the Petition, Attachment 1 to Findings) states it will pave the two access driveways at the Project site as well as the asphalt plant production area, which will reduce dust. Bituminous will have a street sweeper onsite at all times to remove any materials tracked onto County State Aid Highway (CSAH 54). In addition, the areas at the Project site not paved will be surfaced with gravel and watered on an as-needed basis to prevent fugitive dust from leaving the Project site. 56. The Bituminous CUP application states Project traffic will consist of trucks bringing raw materials and hauling finished products, with the amount of trucks per day varying based on local construction activity and product demand. Bituminous estimates traffic of peak day production to generate approximately 250 round-trip truck visits, with approximately 120 trips leaving the Project property with loads of asphalt, and the remainder consisting of trucks bringing aggregate and rubble to the Project property or leaving the Project property with road base materials. 57. The Bituminous CUP application states that trucks importing and exporting materials from the Project property will enter from CSAH 54 using the northernmost access drive as the primary entrance to the Project property, and exit the Project property at the south access drive back out to CSAH 54. Truck traffic from the site may head either north or south on CSAH 54. 58. MnDOT requires trucks be secured and transported to prevent loss of material onto the roadway and surrounding areas. According to the MnDOT commercial vehicle manual, the manner of loading is regulated under Minn. Stat. § 169.81, subd. 5, and, Minnesota has adopted the load securement requirements of the Federal Motor Carrier Safety Regulations: http://www.dot.state.mn.us/cvo/mcr/MnTruckRegl/MNTruckReg.pdf. 59. Bituminous will require truck drivers to clean any spills following loading or unloading, which will help prevent excess dust. 60. The MPCA finds the proposed Project is designed to meet federal, state, and local requirements for air emissions for hot mix asphalt production and materials storage at the Project property. 61. The MPCA finds that the Project, as it is proposed, does not have the potential for significant environmental effects based on the type, extent, and reversibility of impacts related to air quality that are reasonably expected to occur from the Project.