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(�co�%I:n�;inc��i:� <br /> Scptcmhcr 2. 19)2 <br /> Gculcrhnii�:d. <br /> f.enencimn menial:md <br /> Grolo�ic Scn ice+ <br /> Rcid Middleton & Associa�e.a <br /> 19031 33rd Avenue Wes�, Suite 301 <br /> Lynnwood, Washington 9803G-(�C>3R <br /> Attention: Mr. Doh GaltclanJ <br /> Nepnn <br /> Ga�tcehnical Gnginccring Scrvices <br /> Gvaluatinn of Stormu;ncr Uc�eniion Paeility <br /> Gverctt, Washington <br /> 7he I3oeing Company <br /> Pilc N��. 0120-ISO-RIO <br /> INTRODUCTION <br /> This repon presents the results of our gaitechnical engincering sen�i�es al the exisling <br /> stormwater detention facility locatul in Uie northeastern purtion uf lhe Uoeing I:verett facility. <br /> The site, which includes an earth dam and deteNion pond, is Iocatul immaliately north of thc <br /> pruposed Nonh Parking Lot and is hordered un the cast hy 1'luke ManufacWring property. Tlic <br /> site and surrounding area are shoH�n on the Vicinily Map, Pigure I. Our services have hecn <br /> cumpleted in accordance with our Confirming Agreement dated August 19, 1992. <br /> PROJECT BACKGROUND AND UNDERSTANDING <br /> Ga�L'ngineers proviJ�l g�Yitechnical design recommendn�ions and moniioring services t��r <br /> runstruc�iun of the detemion punJ and eanl� Jam in 1984, at thc time Ihe property was oµncJ <br /> hy Pluke Manul'ac�uring, Inc. Our specitic invulvement includui cumplciing a suhsurtiirr <br /> exploration program �I ihe sile, g�itechnical ra:ommenJ�tions for design of the detention ponJ, <br /> and mnnitoring services during cunstruc�ion of�he dam and dGemion pond. <br /> We understnnd thnt i� is plannal �n modify the existing de�emion pond in conjunc�inn with <br /> ' conswction of the pruposul North Parking Lut. 7his modificstion w�ill consist of expanding the <br /> pond frum its pre.eent capacity nf appruximatdy 3 �cre-t�et tu appruxim,uely 5 acre-feet. The <br /> � y Gnrt:nginirrs.Inr <br /> M��IU li�ilh A��ruur\ I <br /> Hrlmnnd.IX'A '�Ru;� <br /> , �Prir��I�anCI:INiIH�,l�,u���� <br /> F:��121Ni)Wd 6USii <br /> �"..iM m rwl:ryd n��.• <br />