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.ROM FRCILITIES EuT a. 2o, 1%? �� �� P• 3 <br /> �ii�ct El��ntas <br /> `:- Th� followinq is en �xpanQeQ Qiocue�ion o! th� prominent proj�ct <br /> •iememt� enA how thay relat� to th� potantisl impects id�ntified <br /> �bov�. <br /> 1�, p�tland�. Beven-t�nths ef one scra o! Metlend� will be <br /> liL1�A by the propo�ed Cavelopment. Th• ar�a is ehown on <br /> Sh�et 2 0! th� ettnctted Environm�ntal Cheokliet. <br /> 8. �!• <br /> short-term - normal construction noise� wi1= ocour at tnA <br /> •ita during th� conatruction phess (�atimnt�A through 4th <br /> quarter o! 1989) . <br /> ��� - the eix work positiong creeted on this flightline <br /> rnmp �xtansion will provl.Qe mor� llexibility for Boeing in <br /> moetinq Curr�nt and project�A produation ratse. Bosing notes <br /> thet Ehc� rxi�tina llightlin� can ecepmmodate thosa rates <br /> except Lor a short-term backup due to dalays in tho <br /> c�rtif'c.�r.�,on enQ deliveriex oi tha 747-400 in th� first h� <br /> ot 19tta . They el�o note that no edditf-��+1 employ�ee wil? <br /> requ� i••:.a tor th��� work etetions. eor �e reesons anely - <br /> o! potentisl noiw trom y�hl��sa, xsm��. .�3L1Qn�r Sllatl� <br /> p�eration�, enQ anaine runyy�! dateLtinineA no •igniPicent <br /> edditional lmpaat would oacur. some of the exi�ting vehi,.l�, <br /> � remp, an4 �nqino runup nois�� would, hawever, bs moved to the <br /> new flightlin� erae. <br /> bitiaat�on Mesaur��: <br /> Th• followinq mitiqation meesures ers found to be necesenry to <br /> malntain identifi�d environm�ntal impacts at accaptable Iav�ls. <br /> i. Th• r�quirement• imposed by the U.B. Ai�ny Corp o! Engineers <br /> throuqh their issuanc� o! a nationwide 404 permit reqerding <br /> the filling of the gevan-t�nthe o! en ecr� df wetlanda. <br /> 2. The Airport�s 111pha/Jepanese Culch ret�ntion pond has e <br /> cepacity of 2,028,OOD cubic f��t (46. 5 acra leet) which is <br /> ad�quata to eocommodate e 3oo-yanr storm includinq the runoff <br /> from this proj�ct�s 25 acrs� of impervious surface. The <br /> project must comply with Snohumiah County's Titls 24 Code <br /> i r�garAing auriac• water managam�nt to racaive necessery <br /> parmite. <br /> 3. The pro�ect itself will not create any edditinnal Song-term <br /> noia� but in the CA/! of vehicla remp and anqina run <br /> operations may move the ar�a whora some of thoss noiees now <br /> occur lrom tha existing fiightline ramp to the new flightline <br /> �' � <br /> - Y - <br />