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• <br /> • <br /> designed to monitor the production of ozone under transmission lines have been <br /> unable to detect any increase attributable to the transmission line facility.'25 <br /> 129. Minnesota sets an ozone limit of 0.08 parts per million (ppm) as the highest eight <br /> hour average; the federal limit is 0.075 ppm as the fourth-highest eight hour daily <br /> maximum average.126 <br /> 130. Calculations according to the Bonneville Power Administration Corona and Field <br /> Effects Program Version 3 for a standard single-circuit 115 kV project predicted a <br /> maximum concentration of 0.006 ppm near the conductor and 0.002 ppm at one <br /> meter above ground during foul weather or worst case conditions with rain at one <br /> inch per hour.127 <br /> 131. Air quality impacts caused by construction vehicle emissions and fugitive dust <br /> from right-of-way clearing and construction are expected to occur, but will be <br /> temporary and limited.128 <br /> 132. Temporary impacts due to construction vehicle emissions and fugitive dust would <br /> be minimized by using best management practices to reduce dust emissions. <br /> Tracking control practices and wetting of roads and temporary roads would be done <br /> to control fugitive dust. Proper maintenance of the contractor's equipment would <br /> be done to prevent excessive emissions.129 <br /> 133. There would be no anticipated permanent impacts on air quality as a result of the <br /> proposed project. <br /> Transportation and Utilities <br /> 134. U.S. Highway 12 provides a major east-west corridor to the western Twin Cities <br /> Metropolitan area. U.S. Highway 12 widens from two to four lanes at the eastern <br /> edge of the project, approaching the intersection with Hennepin County Road 6 <br /> (also known as 6th Avenue North in this area). MnDOT has completed the U.S. <br /> Highway 12 Bypass project adjacent to and north of the project; no additional work <br /> in this area is planned at this time. Hennepin County Road 6 borders the project to <br /> the south and east.'30 <br /> 135. No new transportation facilities will be required for the project. Delivery of <br /> project components, such as poles and conductors, may have temporary impacts <br /> '25 Ex. 12 at p. 39(EA) <br /> 126 Ibid. <br /> 127 Ibid. <br /> 128 Ibid. at pp.39-40 <br /> 129 Ex.2 at p.53 (Application),Ex. 12 at p.40(EA) <br /> 130 Ex. 12 at p.40(EA) <br /> 26 <br />