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Page 2 of 3 to ensure the facility does not exceed maximum notice standards. If necessary, Applicant will take steps to correct any deficiencies.” and “13. Applicant will complete yearly noise studies on Building 14 and provide the results and findings to the City and take steps to correct any deficiencies that are identified by the studies.” Building permits for the addition were issued on September 28, 2021 and the temporary certificate of occupancy was issued as of December 27, 2022, subject to the required noise study once the building was operational. The first noise study was conducted in 2023 and the results were submitted to the City. In the study’s findings, it was identified that the noise from the facility exceeded the maximum noise standards, and the Applicant was required to take corrective action. It was determined that the source of the noise was due to an air compressor that was not part of the replacement equipment with the addition but was in existence prior to the project. The Applicant proposed a mechanical screen wall at the northwest corner of Building 14 for noise barrier and was issued a building permit on October 11, 2023 for its construction. The construction of the screen wall passed final building inspection as of March 18, 2024. Two additional noise studies were conducted in the first half of 2024 that verified the noise levels from the facility were within the permitted MPCA noise standards. The Applicant has remained compliant with the conditions of approval for the PUD Amendment and will need to continue to supply the City with the results from annual noise studies. Discussion Concept Plan Proposal The Applicant has provided a concept plan for the construction of a noise barrier wall to be constructed on the Subject Property between Building 14 and the adjacent city trail and residential properties to the northwest. The stated purpose of the barrier is to further reduce the level of Boston Scientific generated noise that leaves the campus and reaches adjacent neighborhood properties. The barrier wall installation is stated to help reduce noise while preserving a clean, attractive environment. The proposed noise barrier wall would extend 526 lineal feet and range in height from eight (8) feet to 21 feet as measured from existing grade. The proposed location of the wall would be offset from the property line and follow the curvature of the nearest property line which is shared with City-owned property where a trail is located. The proposed materials for the noise barrier wall are treated pine boards and precast concrete. Construction of the proposed wall would require the removal of significant trees on the Subject Property and the Applicant has stated that the proposed project would include significant landscape improvements to the Subject Property on the trail side of the barrier and the Building 14 side of the barrier. Based on an initial review, staff believes a future proposal would require a land use request for a Planned Unit Development Amendment due to the proposed height of the noise barrier wall. Per Section 1325.05 Design Standards Subd. 4 Screening, screens and buffers are designated units of yard or open area where setbacks, landscaping, berming, walls, and fencing help minimize adverse impacts of public nuisances, such as noise. In Section D. Fences of 1325.05, 4. Height of Fences in Business and Industrial Districts. Fences may be up to eight (8) feet in height in the side and rear yards up to the front building line of the principal structure. As the proposed wall would exceed 8 feet, City approval is required.