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� <br />� <br />� <br />� <br />� <br />� <br />� <br />� <br />� <br />Grass clippings, because of their moistuze content, do nat make a <br />very good fuel source in R.DF inaterial and, consequently, will be <br />process sorted in�o the reject stream for landfilling. It is <br />anticipated that most grass clippings will be source separated, <br />and wilJ. not be delivered to the RDF facility. However, if grass <br />cJ.zppings do occur in any vo�.ume, Washington/Ramsey County and <br />NSP are now considering a program to separate and remove them to <br />County compost si�es rather than landfills. <br />Other yard wastes in the fQrm of brush and tree branches not <br />exceeding six inches diameter and five feet long will be <br />processed into RDF. Larger sizes arriv�ng at the RDF faci�ity <br />will be delivered to the landfill. Note: Refuse hauler's <br />compactor trucks •normal.l.y limit brush and branches to tied <br />bund�es not more than four feet �ong, wi�h branches not exceeding <br />three inches diameter. <br />Plastics are pzesently considered an acceptable RDF inaterial, and <br />a11 plastics received will be processed as a fue� item. <br />Acceptable material will be allowed to enter, via conveyor belts, <br />a flail mill. This mil� has the most potential for explosian/tire. <br />To protect against potential problems, the f�ail machinery will <br />be housed in a separate concrete structure with tire and Halon- <br />type explosion suppression equipment. Should an explosion occur, <br />�he impact would pass through a vented roof equipped with mats to <br />stop project�les. This section of the facility wil� be monitored <br />through a closed circuifi. televisian system. <br />7 From the flail �'nill, refuse moves to the shredder foz further <br />� size reduction and processi.ng. At this point, ferrous metals <br />will be magnetically removed fzom the process and recycled. <br />� Aluminum, although mixable with the RDF fuel component, will <br />also most likely be manually removed and recycled by plant <br />personnel. <br />� <br />� <br />� <br />� <br />� <br />� <br />� <br />The remaining material is pzocessed through a series of air and <br />screen sorters, which continue to reduce material down to a size <br />which can be readily burned at the two designated NSP facilities <br />in Red Wing, Minnesata and Mankato, Minnesota. Once the material <br />reaches the appropriate dimensians, it is l.aaded i.nta enclosed <br />tractor/trailer trucks for transportation to the burn facz.lities. <br />Zt is estimated that approxianately torty trailers per day wil� be <br />required to handle the refuse. There will be on--site storage ca- <br />pacity for approximately 300 tons of RDF inaterial. Approximately <br />3Q,OQ0 square feet of trailer parking is available at the site. <br />Processes are sched�Ied to be i.n place throughout the facility to <br />control rodents, errant yard waste, adors, and noise. Rodent <br />control will be handled by standard pest control devices. Yard <br />personnel will maintain surrounding groun�is as necessary. Odor <br />control will uti.lize a chemical control system distributed <br />through pipes and fog nozzles. Noise abatement wil� .include such <br />items as an insulated building far "tipping" activities, <br />presorting to remove elements which would create noise if allowed <br />into the proc�ss�ng equipment, Iow noise fans, and ather noise <br />suppression equipment. <br />m <br />