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,Mar. 18. 1997 12:54PM BRAUN INTERTEC CORP No. 3987 p, 4/13 1.0 Executive Summary Braun Intertec has prepared an Indirect Source Permit (lSP) application for a proposed office, hotel and restaurant business development between Interstate 35W and Cleveland Avenue in Roseville. Minnesota. This project is expected to begin in April 1997 and be substantially completed in 2000. The project includes 619,600 square feet of new building floor space. An additional 2,130 parking spaces will be installed as a result of this project. Hours of opecation will vary: 24 hours a day for the hotel, daytime and evening operations for the restaurants and daytime operations for the offices. As part of the ISP application, noise impact modeling was conducted. Three receptor locations were used in the evaluation of the noise impact under pre-and post-development conditions. Relative to the Minnesota Noise Standards in Minnesota Rules Chapter 7030. post~evelOPJDel1t traffic noise levels could potentially exceed the LID (65 dB(A)) and below the Lso residential standards (60 dB(A)) at Receivers 1 and 2. However, the predicted Lso noise levels at Receiver 1 are reduced from current levels by 0.4 dB(A). Post~evelopment traffic noise levels are anticipated to be below the ~o [70 dB(A)] and Lso [65 dB(A)] commercial standards at Receiver 3. In addition, the predicted LID and Lso noise levels at Receiver 3 are reduced. by 1.3 and 3.9 dB(A), respectively. The reduced noise levels at Receivers 1 and 3 are due to the attenuation effects of proposed buildings that would sqJarate these receptors from roadways. Since the noise impact modeling predicts a possible violation of the Minnesota Pollution Control Agency's (MPCA) noise rules. Minn. R. ch. 7030, for the post-development scenario, the applicant is seeking a noise exemption. Minn. Stat. i 116.07, subd. 2a(2) (Supp. 1995) exempts from the MPCA's noise rules: "(2) an existing or newly constructed segment of a highway. provided that ail reasonable available noise mitigation measures. as approved by the commissioners of the department of transportation and pollution control agency, are employed to abate noise." If" however, the MPCA is not prepared to address the request for an exemption then the applicant would request a letter of no-action regarding the expected noise generated by the Centre Pointe Business Park DevelopJneDI from the MPCA. The proposed development is eligible fur an exemption because the main source of the noise causing the predicted exceedance is an existing segment of a highway (l-35W), and all reasonably available noise mitigation measures are being employed to abate noise.