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Blast Vibration Analysis: Proposed MMRR Quarry <br />Page 7 <br />One critical component of the Duall Odor Control System is a fan motor combination manufactured <br />by New York Blowerb. Their operations manual notes that fan problems may be caused by <br />"excessive vibration" and "externally transmitted vibration." <br />Suspended Equipment - a number of components throughout the plant, notably air handling <br />equipment, aze suspended from the ceiling. While typically less massive than floor-mounted <br />equipment, they are nonetheless highly susceptible to swinging when subjected to horizontal <br />acceleration. The installed vertical bracing was not designed to, and cannot adequatelyrestrainthsse <br />devices from additional blast-induced horizontal forces. Suspended components including air <br />handlers, ductwork, fans, lighting, etc. would have to be reevaluated to determine their vulnerability <br />to additional horizontal loads. Additional bracing in both horizontal directions as well as additional <br />vertical bracing (to increase resistance to an upwazd movement) may be required throughout the <br />plants. <br />Ultraviolet Disinfection -the final step in the wastewater treatment process is disinfection. <br />Pathogen destruction is a key component of wastewater treatment and thus a basic element ofpublic <br />health. It is an especially important consideration when the receiving water body (North Clear <br />Creek) is eventually used as a drinking water source by the Standley Lake Cities. <br />The BHCCSD plant utilizes iJV lights as its disinfectant. iJV lamps aze housed within quartz <br />sleeves in a horizontal array. Precise alignment and calibration of the lamp assembly is required to <br />assure effective pathogen kill. The warranty document for the lamp assembly explicitly states, <br />"...any excess vibration...shall void this warranty." Excessive shock or vibration to the LJV lamp <br />assembly represents a potentially adverse impact to its proper operation and may void the warranty <br />held by BHCCSD. Failure of the iJV system would result in dischazge of pathogens to North Clear <br />~ Creek and present a potential health risk. <br />e The New York Blower Company, 7660 Quincy Street, Willowbrook, Illinois 60527 <br />' Applied Technology CouncillStmctural Engineers Association of Southern California Briefmg Paper No. 5 <br />s Trojani1V3000T"'Plus, Trojan Technologies Inc., 3020 Gore Rd, London, Ontario, Canada, NSV 4T7 <br />©Leonard Rice Engineers, Inc. November 10, 2005 -Job No. 1086BCS03D <br />