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B. Any one of the following will not disturb neighbors: noise, odor, smoke, dust, vibration, glare, radiation <br />or late hours of operation. <br />Overview <br />Potential issues identified and evaluated related to this compatibility standard are listed below and <br />discussed in more detail in the subsequent subsections. <br />Those from onsite mining activities <br />1. Vibration <br />2. Subsidence <br />Those related to haul truck traffic on north CR 120 <br />1. Noise/Vibration <br />2. Dust <br />3. Late Hours of Operation <br />Odor, smoke, glare, and radiation have not been identified as significant issues and therefore not <br />addressed within this report. <br />Noise/Vibration Associated with Underground Mine Activities <br />Relevant reports provided by GCC included within the CDS Analytical Data Submittal include: <br />1. Ground Motion Studies, Matheson Mining Consultants, January 16, 2013 <br />2. Underground Miner Ground Motion Study Report, Matheson Mining Consultants, December 1I- <br />31, 2014 <br />The County engaged a third -party consultant to analyze noise and vibration: Review of Noise and <br />Vibrations from CR120 Truck Traffic and Mining Operations at the GCC Energy King II Coal Mine, Dr. <br />Catherine Aimone-Martin, Aimone-Martin Associates, September 7, 2015 (Attachment 12). <br />GCC's investigation into vibration was in response to residents of the Vista del Oro subdivision. Two <br />sources of potential ground vibration were identified - a ventilation fan at the mine portal and the <br />continuous miner machine within the mine. Prior to testing, GCC constructed a concrete sound wall <br />surrounding the ventilation fan as a pre-emptive mitigation measure. <br />GCC did not perform a comprehensive impact assessment, but rather collected data in response to the <br />complaints. There were a total of five test sites, one next to the mine fan, two next to the mine processing <br />operations on the surface, two at residences off-site. The residences were 7,000 feet from the ventilation <br />fan and 9,700 feet from the underground miner. Data results showed no detectable ground motion near <br />residential test location and "low level" ground motion levels within 100 feet of the mine fan. <br />The County's consultant, Aimone-Martin Associates, indicated that the peak vibration at the residences <br />was approximately eight times lower than the threshold for human perception (0.03inches/second) and <br />approximately fourteen times lower than vibrations which could cause hairline cracking in historic plaster <br />walls (minimal). <br />In response to continued resident comment, GCC then took measurements on the ground surface directly <br />above the continuous miner equipment — approximately 300 feet above the continuous miner. No induced <br />vibrations were recorded. Aimone-Martin Associates indicated that in her experience vibrations drop <br />below that detectable by human perception within 25 feet of this type of equipment. <br />Project No. 2012-0089 PC <br />4852-5627-2942, v. 3 <br />Page 21 of 32 <br />(DM, VS, DP) <br />