2408 RAVENNA ST 2016-01-01 MF Import

........ � � � '% ' Geotechnical Engineerin�t RcFwrt � Lowdl 5 ��rt Plat lune 2, 1999 NCA Fiie No. 259499 Page 3 water seepage wns obseNed flowing over the ground surface nenr a concrou vault aloug the existin¢ sanitary sewer main itnmediately eazt of the existing iesidence. A drainage ditch or smail stream is iocated along the north side of Ravenna Street. An e�cistiug resider;e is located wid�in Lot i in the northem poRion of the site. '�he rosidence is cuaendy accessed by��co•,�retr drivewuy on the west side and a erushed rock dtive�•vay east side of the house. M existing two-caz gazage is located within Lot 2. Scattered build'mg debris was located in a lerge area soutlt of the garage,where an old building foundntion was observed. Geolo4Y . 'Ihe geolog:: units �napped for this acea are shown on the C3eoloaic Man of the Everctt 7.5 - Minute Ouadrangle. SnnF1,-, sh Counrv, Washingson. by hunes P. Minard (LJ.S.G.S., 1985). 'Ibe site aies is mapp:d ss'xing u� '_rlain by glacial till(Qvt)and transidona! beds(Qtb). Glecial till is characterized as a dense, unsorted-r,�ixture of sand, silt and grevel, which was deposited at the base of the continental glaciers. Transitio�il beds are described as consisting of clay, silt and very fine send. Our explorntions encouuterod fill an� ;uierbedded silts and fine sands, which appeared co be siunilat to description of the transitiond beds in the above nfecsnced map. � � � � E=plorxtians Ilie sub�•irfece conditions at the site were explored on April 28, 1999. Eight test piu wae excevated with a rubber-tired, tractor-mountcd backhoe. The depths of the backhoe test pits raaged itont 6 to I 1 feet below the e!cisting ground surface. The approximate locations of the rest piU ere shown on the Site Plan in Figuee 2. A geologist from our fum was present during t6e explorarions to exacnine the soils end ceologic: conditions ancountercd,and to maintain logs of the Lest pits. The soils we_c oisually claasiSed in genecal accordwce with the Unified Soil Classificatioa 5ystem,a copy of which is shown on Figure 3. The logs of the test pits, edited to reflect exnmination of soil samples in our labotatory, arc shown on Fi6ures 4 tivough 6. ' Sabsurface Coaditions A su�cial Iayer of sod and topsoil waz encountered in aU of our explordtions ea:cept Test Pit 6,to a depth of'between 0.4 to I.0 feet. In Test Pit 6 the su�cial materiel consisted of various types of conshuction and I�ousehold debris to a depth of 1 fat. This e.rploration was located within an old building footprint. � . . NELSON-COCIVRE'7TE&ASSOCfATES, 1NC.