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Mr. Steve Pullar May 27, 2022 <br />Elk River Sportsman's Club Noise Measurements Page 6 <br />Table 2 summarizes the hourly Leq(h) measurement results from both monitoring periods, the <br />noise level requirement, and the weather data. The loudest hourly level measured at the <br />proposed development properties was from 6 PM to 7 PM on May 16t" during an active firing <br />period of loud rifles at the 600-yard range. This hourly level was an Leq(h) of 61 d6A, which is <br />2 dBA below the protection act limit for residential receivers. <br />The ambient noise level at the sites was low at 43 dBA. Traffic noise from Meadowvale Road <br />NW to the south and Elk Lake Road NW to the east was noticeable at times but not considered <br />excessive. In our opinion, traffic and other sources did not significantly affect levels when the <br />rifle range was in use. There was some low to moderate wind speed during the monitoring <br />periods, although this did not negatively affect the measurements. Wind speeds were <br />determined on-site using a handheld wind meter and by referring to nearby weather station <br />reports. <br />Table 2— Hourly Monitoring Levels Compared to Statute Requirement <br />Measurement Protection Act <br />Results, dBA Limit Trap Club Weather Conditions <br />Date Hour Leq(h) L10 - 2 dBA Conditions Temp Wind Precip <br />4:00 PM 43 dBA Ambient (a few guns) <br />Monday, 5:00 PM 45 dBA Range in use 68 - 73 °F 1- 11 mph N/A <br />May 16, 2022 <br />63 d BA <br />6:00 PM 61 dBA (Residential) Range in use, very <br />loud guns <br />9:00 AM 43 dBA Trap area in use <br />Wednesday, <br />May 18, 2022 69 - 74 °F 2-11 mph N/A <br />4:00 PM 44 dBA Trap area in use <br />