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113. Concrete noise walls of the size and type evaluated in the Noise Assessment should ensure compliance with MPCA noise standards.108 114. Xcel Energy estimates that noise generated from the transmission line and associated facilities to be no more than 23.3 dBA L5 at the edge of the right-of-way, which is below the most stringent Noise Area Classification level of 50 dB(A) L50 established by the MPCA.109 This is also below the ambient levels measures as part of the Noise Assessment.10 Public Health and Safety 115. Xcel Energy will design the project to be in compliance with local, state, NESC, and Xcel Energy standards for clearance to ground, crossing utilities and buildings, strength of materials, and right-of-way widths, and permit requirements.'11 116. The transmission line would be equipped with protective devices to safeguard the public if an accident occurs. The protective equipment is designed to de-energize the transmission line should such an event occur.'' 117. Substations will be fenced and accessible only by authorized personnel.13 118. The issue of electric and magnetic fields was discussed in the environmental assessment.14 A number of national and international health agencies (the Minnesota Department of Health, the World Health Organization, the National Institute of Environmental Health Sciences) have concluded in their research that there is insufficient evidence to prove a connection between electric and magnetic field exposures and health effects. Research has not been able to establish a cause and effect relationship between exposure to magnetic fields and human disease, nor a plausible biological mechanism by which exposure to electric and magnetic fields could cause disease.15 119. Xcel Energy-has calculated magnetic fields for this project under average and peak load conditions. Models with forecasted peak loads are utilized to determine the maximum flows on transmission lines during normal operating conditions. Under average load conditions, estimated magnetic fields at one meter above the ground and directly beneath the transmission line range from approximately 8 to 67 milligauss depending upon structure type. Under peak load conditions, estimated 108 Ex.24 at pp. 10, 13(Noise Assessment) 109 Ex. 12 at p.28(EA) 110 Ex.24 at p. 5 "' Ex.2 at p.40(Application),Ex. 12 at pp.14,20(EA) 112 Ex.2 at p.40(Application) 113 Ibid.,Ex. 12 at p. 17,20(EA) "'Ex. 12 at pp.29-38(EA) ";Ibid. at pp.36-37 23