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Cyphers Logistic Park AUAR 52 March 2022 • Trout streams: if stormwater discharges will enter or affect a trout stream an evaluation of the impacts on the chemical composition and temperature regime of the stream and the consequent impacts on the trout population (and other species of concern) must be included. Traffic Generated Noise Scenario 1, 2, 3, and 4 The AUAR study area is predominantly existing agricultural land near state highways and county roads. The Union Pacific railroad passes though the southern portion of the AUAR study area. Existing traffic noise sources at the site are from the surrounding roadways. Traffic volumes in the AUAR s tudy area are either on roadways that do not have receivers that are sensitive to noise, or the traffic levels attributable to the project are well below the amount that would generate a sound increase that could be noticeable. The change in traffic noise levels is not anticipated to be readily perceptible. A sound increase of 3 dBA is barely noticeable by the human ear, a 5 dBA increase is clearly noticeable, and a 10 dBA increase is heard as twice as loud. For example, if the sound energy is doubled (i.e., the amount of traffic doubles), there is a 3 dBA increase in noise, which is just barely noticeable to most people. On the other hand, if traffic increases by a factor of 10, the resulting sound level will increase by about 10 dBA and be perceived as twice as loud. Operational Noise Scenario 1, 2, 3, and 4 The Lake Elmo Code of Ordinances regulates mechanical noise associated with building operation by the standards set by the MPCA and Washington County.5 All future development of the study area will be required to comply with these requirements. Construction Noise Scenario 1, 2, 3, and 4 As stated in the AUAR guidelines, construction noise need not be addressed unless there is some unusual reason to do so. No unusual circumstances have been identified that would necessitate a detailed construction noise analysis. The Lake Elmo Code of Ordinances regulates both the hours of operation for construction equipment and allowable noise levels. All construction and development activities in the AUAR s tudy area must comply with these requirements. 18. Transportation AUAR Guidance: For AUAR reviews a detailed traffic analysis will be needed, conforming to the MnDOT guidance as listed on the EAW form. a. Describe traffic-related aspects of project construction and operation. Include 1) existing and proposed additional parking spaces; 2) estimated total average daily traffic generated; 3) estimated maximum peak hour traffic generated and time of occurrence; 4) source of trip generation rates used in the estimates; and 5) availability of transit and/or other alternative transportation modes. Parking 5 Source: Lake Elmo, Minnesota, Municipal Code § 9.04.050 (h)